tahoe-lafs/src/allmydata/test/test_web.py

import os.path, re, urllib
import simplejson
from StringIO import StringIO
from twisted.application import service
from twisted.trial import unittest
from twisted.internet import defer, reactor
from twisted.web import client, error, http
from twisted.python import failure, log
from nevow import rend
from allmydata import interfaces, uri, webish
from allmydata.storage.shares import get_share_file
from allmydata.storage_client import StorageFarmBroker
from allmydata.immutable import upload, download
from allmydata.dirnode import DirectoryNode
from allmydata.nodemaker import NodeMaker
from allmydata.unknown import UnknownNode
from allmydata.web import status, common
from allmydata.scripts.debug import CorruptShareOptions, corrupt_share
from allmydata.util import fileutil, base32
from allmydata.test.common import FakeCHKFileNode, FakeMutableFileNode, \
     create_chk_filenode, WebErrorMixin, ShouldFailMixin, make_mutable_file_uri
from allmydata.interfaces import IMutableFileNode
from allmydata.mutable import servermap, publish, retrieve
import common_util as testutil
from allmydata.test.no_network import GridTestMixin
from allmydata.test.common_web import HTTPClientGETFactory, \
     HTTPClientHEADFactory
from allmydata.client import Client

# create a fake uploader/downloader, and a couple of fake dirnodes, then
# create a webserver that works against them

timeout = 480 # Most of these take longer than 240 seconds on Francois's arm box.

class FakeStatsProvider:
    def get_stats(self):
        stats = {'stats': {}, 'counters': {}}
        return stats

class FakeNodeMaker(NodeMaker):
    def _create_lit(self, cap):
        return FakeCHKFileNode(cap)
    def _create_immutable(self, cap):
        return FakeCHKFileNode(cap)
    def _create_mutable(self, cap):
        return FakeMutableFileNode(None, None, None, None).init_from_uri(cap)
    def create_mutable_file(self, contents="", keysize=None):
        n = FakeMutableFileNode(None, None, None, None)
        return n.create(contents)

class FakeUploader(service.Service):
    name = "uploader"
    def upload(self, uploadable, history=None):
        d = uploadable.get_size()
        d.addCallback(lambda size: uploadable.read(size))
        def _got_data(datav):
            data = "".join(datav)
            n = create_chk_filenode(data)
            results = upload.UploadResults()
            results.uri = n.get_uri()
            return results
        d.addCallback(_got_data)
        return d
    def get_helper_info(self):
        return (None, False)

class FakeHistory:
    _all_upload_status = [upload.UploadStatus()]
    _all_download_status = [download.DownloadStatus()]
    _all_mapupdate_statuses = [servermap.UpdateStatus()]
    _all_publish_statuses = [publish.PublishStatus()]
    _all_retrieve_statuses = [retrieve.RetrieveStatus()]

    def list_all_upload_statuses(self):
        return self._all_upload_status
    def list_all_download_statuses(self):
        return self._all_download_status
    def list_all_mapupdate_statuses(self):
        return self._all_mapupdate_statuses
    def list_all_publish_statuses(self):
        return self._all_publish_statuses
    def list_all_retrieve_statuses(self):
        return self._all_retrieve_statuses
    def list_all_helper_statuses(self):
        return []

class FakeClient(Client):
    def __init__(self):
        # don't upcall to Client.__init__, since we only want to initialize a
        # minimal subset
        service.MultiService.__init__(self)
        self.nodeid = "fake_nodeid"
        self.nickname = "fake_nickname"
        self.introducer_furl = "None"
        self.stats_provider = FakeStatsProvider()
        self._secret_holder = None
        self.helper = None
        self.convergence = "some random string"
        self.storage_broker = StorageFarmBroker(None, permute_peers=True)
        self.introducer_client = None
        self.history = FakeHistory()
        self.uploader = FakeUploader()
        self.uploader.setServiceParent(self)
        self.nodemaker = FakeNodeMaker(None, None, None,
                                       self.uploader, None, None,
                                       None, None)

    def startService(self):
        return service.MultiService.startService(self)
    def stopService(self):
        return service.MultiService.stopService(self)

    MUTABLE_SIZELIMIT = FakeMutableFileNode.MUTABLE_SIZELIMIT

class WebMixin(object):
    def setUp(self):
        self.s = FakeClient()
        self.s.startService()
        self.staticdir = self.mktemp()
        self.ws = webish.WebishServer(self.s, "0", staticdir=self.staticdir)
        self.ws.setServiceParent(self.s)
        self.webish_port = port = self.ws.listener._port.getHost().port
        self.webish_url = "http://localhost:%d" % port

        l = [ self.s.create_dirnode() for x in range(6) ]
        d = defer.DeferredList(l)
        def _then(res):
            self.public_root = res[0][1]
            assert interfaces.IDirectoryNode.providedBy(self.public_root), res
            self.public_url = "/uri/" + self.public_root.get_uri()
            self.private_root = res[1][1]

            foo = res[2][1]
            self._foo_node = foo
            self._foo_uri = foo.get_uri()
            self._foo_readonly_uri = foo.get_readonly_uri()
            self._foo_verifycap = foo.get_verify_cap().to_string()
            # NOTE: we ignore the deferred on all set_uri() calls, because we
            # know the fake nodes do these synchronously
            self.public_root.set_uri(u"foo", foo.get_uri(),
                                     foo.get_readonly_uri())

            self.BAR_CONTENTS, n, self._bar_txt_uri = self.makefile(0)
            foo.set_uri(u"bar.txt", self._bar_txt_uri, self._bar_txt_uri)
            self._bar_txt_verifycap = n.get_verify_cap().to_string()

            foo.set_uri(u"empty", res[3][1].get_uri(),
                        res[3][1].get_readonly_uri())
            sub_uri = res[4][1].get_uri()
            self._sub_uri = sub_uri
            foo.set_uri(u"sub", sub_uri, sub_uri)
            sub = self.s.create_node_from_uri(sub_uri)

            _ign, n, blocking_uri = self.makefile(1)
            foo.set_uri(u"blockingfile", blocking_uri, blocking_uri)

            unicode_filename = u"n\u00fc.txt" # n u-umlaut . t x t
            # ok, unicode calls it LATIN SMALL LETTER U WITH DIAERESIS but I
            # still think of it as an umlaut
            foo.set_uri(unicode_filename, self._bar_txt_uri, self._bar_txt_uri)

            _ign, n, baz_file = self.makefile(2)
            self._baz_file_uri = baz_file
            sub.set_uri(u"baz.txt", baz_file, baz_file)

            _ign, n, self._bad_file_uri = self.makefile(3)
            # this uri should not be downloadable
            del FakeCHKFileNode.all_contents[self._bad_file_uri]

            rodir = res[5][1]
            self.public_root.set_uri(u"reedownlee", rodir.get_readonly_uri(),
                                     rodir.get_readonly_uri())
            rodir.set_uri(u"nor", baz_file, baz_file)

            # public/
            # public/foo/
            # public/foo/bar.txt
            # public/foo/blockingfile
            # public/foo/empty/
            # public/foo/sub/
            # public/foo/sub/baz.txt
            # public/reedownlee/
            # public/reedownlee/nor
            self.NEWFILE_CONTENTS = "newfile contents\n"

            return foo.get_metadata_for(u"bar.txt")
        d.addCallback(_then)
        def _got_metadata(metadata):
            self._bar_txt_metadata = metadata
        d.addCallback(_got_metadata)
        return d

    def makefile(self, number):
        contents = "contents of file %s\n" % number
        n = create_chk_filenode(contents)
        return contents, n, n.get_uri()

    def tearDown(self):
        return self.s.stopService()

    def failUnlessIsBarDotTxt(self, res):
        self.failUnlessEqual(res, self.BAR_CONTENTS, res)

    def failUnlessIsBarJSON(self, res):
        data = simplejson.loads(res)
        self.failUnless(isinstance(data, list))
        self.failUnlessEqual(data[0], u"filenode")
        self.failUnless(isinstance(data[1], dict))
        self.failIf(data[1]["mutable"])
        self.failIf("rw_uri" in data[1]) # immutable
        self.failUnlessEqual(data[1]["ro_uri"], self._bar_txt_uri)
        self.failUnlessEqual(data[1]["verify_uri"], self._bar_txt_verifycap)
        self.failUnlessEqual(data[1]["size"], len(self.BAR_CONTENTS))

    def failUnlessIsFooJSON(self, res):
        data = simplejson.loads(res)
        self.failUnless(isinstance(data, list))
        self.failUnlessEqual(data[0], "dirnode", res)
        self.failUnless(isinstance(data[1], dict))
        self.failUnless(data[1]["mutable"])
        self.failUnless("rw_uri" in data[1]) # mutable
        self.failUnlessEqual(data[1]["rw_uri"], self._foo_uri)
        self.failUnlessEqual(data[1]["ro_uri"], self._foo_readonly_uri)
        self.failUnlessEqual(data[1]["verify_uri"], self._foo_verifycap)

        kidnames = sorted([unicode(n) for n in data[1]["children"]])
        self.failUnlessEqual(kidnames,
                             [u"bar.txt", u"blockingfile", u"empty",
                              u"n\u00fc.txt", u"sub"])
        kids = dict( [(unicode(name),value)
                      for (name,value)
                      in data[1]["children"].iteritems()] )
        self.failUnlessEqual(kids[u"sub"][0], "dirnode")
        self.failUnless("metadata" in kids[u"sub"][1])
        self.failUnless("ctime" in kids[u"sub"][1]["metadata"])
        self.failUnless("mtime" in kids[u"sub"][1]["metadata"])
        self.failUnlessEqual(kids[u"bar.txt"][0], "filenode")
        self.failUnlessEqual(kids[u"bar.txt"][1]["size"], len(self.BAR_CONTENTS))
        self.failUnlessEqual(kids[u"bar.txt"][1]["ro_uri"], self._bar_txt_uri)
        self.failUnlessEqual(kids[u"bar.txt"][1]["verify_uri"],
                             self._bar_txt_verifycap)
        self.failUnlessEqual(kids[u"bar.txt"][1]["metadata"]["ctime"],
                             self._bar_txt_metadata["ctime"])
        self.failUnlessEqual(kids[u"n\u00fc.txt"][1]["ro_uri"],
                             self._bar_txt_uri)

    def GET(self, urlpath, followRedirect=False, return_response=False,
            **kwargs):
        # if return_response=True, this fires with (data, statuscode,
        # respheaders) instead of just data.
        assert not isinstance(urlpath, unicode)
        url = self.webish_url + urlpath
        factory = HTTPClientGETFactory(url, method="GET",
                                       followRedirect=followRedirect, **kwargs)
        reactor.connectTCP("localhost", self.webish_port, factory)
        d = factory.deferred
        def _got_data(data):
            return (data, factory.status, factory.response_headers)
        if return_response:
            d.addCallback(_got_data)
        return factory.deferred

    def HEAD(self, urlpath, return_response=False, **kwargs):
        # this requires some surgery, because twisted.web.client doesn't want
        # to give us back the response headers.
        factory = HTTPClientHEADFactory(urlpath, method="HEAD", **kwargs)
        reactor.connectTCP("localhost", self.webish_port, factory)
        d = factory.deferred
        def _got_data(data):
            return (data, factory.status, factory.response_headers)
        if return_response:
            d.addCallback(_got_data)
        return factory.deferred

    def PUT(self, urlpath, data, **kwargs):
        url = self.webish_url + urlpath
        return client.getPage(url, method="PUT", postdata=data, **kwargs)

    def DELETE(self, urlpath):
        url = self.webish_url + urlpath
        return client.getPage(url, method="DELETE")

    def POST(self, urlpath, followRedirect=False, **fields):
        url = self.webish_url + urlpath
        sepbase = "boogabooga"
        sep = "--" + sepbase
        form = []
        form.append(sep)
        form.append('Content-Disposition: form-data; name="_charset"')
        form.append('')
        form.append('UTF-8')
        form.append(sep)
        for name, value in fields.iteritems():
            if isinstance(value, tuple):
                filename, value = value
                form.append('Content-Disposition: form-data; name="%s"; '
                            'filename="%s"' % (name, filename.encode("utf-8")))
            else:
                form.append('Content-Disposition: form-data; name="%s"' % name)
            form.append('')
            if isinstance(value, unicode):
                value = value.encode("utf-8")
            else:
                value = str(value)
            assert isinstance(value, str)
            form.append(value)
            form.append(sep)
        form[-1] += "--"
        body = "\r\n".join(form) + "\r\n"
        headers = {"content-type": "multipart/form-data; boundary=%s" % sepbase,
                   }
        return client.getPage(url, method="POST", postdata=body,
                              headers=headers, followRedirect=followRedirect)

    def shouldFail(self, res, expected_failure, which,
                   substring=None, response_substring=None):
        if isinstance(res, failure.Failure):
            res.trap(expected_failure)
            if substring:
                self.failUnless(substring in str(res),
                                "substring '%s' not in '%s'"
                                % (substring, str(res)))
            if response_substring:
                self.failUnless(response_substring in res.value.response,
                                "response substring '%s' not in '%s'"
                                % (response_substring, res.value.response))
        else:
            self.fail("%s was supposed to raise %s, not get '%s'" %
                      (which, expected_failure, res))

    def shouldFail2(self, expected_failure, which, substring,
                    response_substring,
                    callable, *args, **kwargs):
        assert substring is None or isinstance(substring, str)
        assert response_substring is None or isinstance(response_substring, str)
        d = defer.maybeDeferred(callable, *args, **kwargs)
        def done(res):
            if isinstance(res, failure.Failure):
                res.trap(expected_failure)
                if substring:
                    self.failUnless(substring in str(res),
                                    "%s: substring '%s' not in '%s'"
                                    % (which, substring, str(res)))
                if response_substring:
                    self.failUnless(response_substring in res.value.response,
                                    "%s: response substring '%s' not in '%s'"
                                    % (which,
                                       response_substring, res.value.response))
            else:
                self.fail("%s was supposed to raise %s, not get '%s'" %
                          (which, expected_failure, res))
        d.addBoth(done)
        return d

    def should404(self, res, which):
        if isinstance(res, failure.Failure):
            res.trap(error.Error)
            self.failUnlessEqual(res.value.status, "404")
        else:
            self.fail("%s was supposed to Error(404), not get '%s'" %
                      (which, res))


class Web(WebMixin, WebErrorMixin, testutil.StallMixin, unittest.TestCase):
    def test_create(self):
        pass

    def test_welcome(self):
        d = self.GET("/")
        def _check(res):
            self.failUnless('Welcome To Tahoe-LAFS' in res, res)

            self.s.basedir = 'web/test_welcome'
            fileutil.make_dirs("web/test_welcome")
            fileutil.make_dirs("web/test_welcome/private")
            return self.GET("/")
        d.addCallback(_check)
        return d

    def test_provisioning(self):
        d = self.GET("/provisioning/")
        def _check(res):
            self.failUnless('Tahoe Provisioning Tool' in res)
            fields = {'filled': True,
                      "num_users": int(50e3),
                      "files_per_user": 1000,
                      "space_per_user": int(1e9),
                      "sharing_ratio": 1.0,
                      "encoding_parameters": "3-of-10-5",
                      "num_servers": 30,
                      "ownership_mode": "A",
                      "download_rate": 100,
                      "upload_rate": 10,
                      "delete_rate": 10,
                      "lease_timer": 7,
                      }
            return self.POST("/provisioning/", **fields)

        d.addCallback(_check)
        def _check2(res):
            self.failUnless('Tahoe Provisioning Tool' in res)
            self.failUnless("Share space consumed: 167.01TB" in res)

            fields = {'filled': True,
                      "num_users": int(50e6),
                      "files_per_user": 1000,
                      "space_per_user": int(5e9),
                      "sharing_ratio": 1.0,
                      "encoding_parameters": "25-of-100-50",
                      "num_servers": 30000,
                      "ownership_mode": "E",
                      "drive_failure_model": "U",
                      "drive_size": 1000,
                      "download_rate": 1000,
                      "upload_rate": 100,
                      "delete_rate": 100,
                      "lease_timer": 7,
                      }
            return self.POST("/provisioning/", **fields)
        d.addCallback(_check2)
        def _check3(res):
            self.failUnless("Share space consumed: huge!" in res)
            fields = {'filled': True}
            return self.POST("/provisioning/", **fields)
        d.addCallback(_check3)
        def _check4(res):
            self.failUnless("Share space consumed:" in res)
        d.addCallback(_check4)
        return d

    def test_reliability_tool(self):
        try:
            from allmydata import reliability
            _hush_pyflakes = reliability
        except:
            raise unittest.SkipTest("reliability tool requires NumPy")

        d = self.GET("/reliability/")
        def _check(res):
            self.failUnless('Tahoe Reliability Tool' in res)
            fields = {'drive_lifetime': "8Y",
                      "k": "3",
                      "R": "7",
                      "N": "10",
                      "delta": "100000",
                      "check_period": "1M",
                      "report_period": "3M",
                      "report_span": "5Y",
                      }
            return self.POST("/reliability/", **fields)

        d.addCallback(_check)
        def _check2(res):
            self.failUnless('Tahoe Reliability Tool' in res)
            r = r'Probability of loss \(no maintenance\):\s+<span>0.033591'
            self.failUnless(re.search(r, res), res)
        d.addCallback(_check2)
        return d

    def test_status(self):
        h = self.s.get_history()
        dl_num = h.list_all_download_statuses()[0].get_counter()
        ul_num = h.list_all_upload_statuses()[0].get_counter()
        mu_num = h.list_all_mapupdate_statuses()[0].get_counter()
        pub_num = h.list_all_publish_statuses()[0].get_counter()
        ret_num = h.list_all_retrieve_statuses()[0].get_counter()
        d = self.GET("/status", followRedirect=True)
        def _check(res):
            self.failUnless('Upload and Download Status' in res, res)
            self.failUnless('"down-%d"' % dl_num in res, res)
            self.failUnless('"up-%d"' % ul_num in res, res)
            self.failUnless('"mapupdate-%d"' % mu_num in res, res)
            self.failUnless('"publish-%d"' % pub_num in res, res)
            self.failUnless('"retrieve-%d"' % ret_num in res, res)
        d.addCallback(_check)
        d.addCallback(lambda res: self.GET("/status/?t=json"))
        def _check_json(res):
            data = simplejson.loads(res)
            self.failUnless(isinstance(data, dict))
            active = data["active"]
            # TODO: test more. We need a way to fake an active operation
            # here.
        d.addCallback(_check_json)

        d.addCallback(lambda res: self.GET("/status/down-%d" % dl_num))
        def _check_dl(res):
            self.failUnless("File Download Status" in res, res)
        d.addCallback(_check_dl)
        d.addCallback(lambda res: self.GET("/status/up-%d" % ul_num))
        def _check_ul(res):
            self.failUnless("File Upload Status" in res, res)
        d.addCallback(_check_ul)
        d.addCallback(lambda res: self.GET("/status/mapupdate-%d" % mu_num))
        def _check_mapupdate(res):
            self.failUnless("Mutable File Servermap Update Status" in res, res)
        d.addCallback(_check_mapupdate)
        d.addCallback(lambda res: self.GET("/status/publish-%d" % pub_num))
        def _check_publish(res):
            self.failUnless("Mutable File Publish Status" in res, res)
        d.addCallback(_check_publish)
        d.addCallback(lambda res: self.GET("/status/retrieve-%d" % ret_num))
        def _check_retrieve(res):
            self.failUnless("Mutable File Retrieve Status" in res, res)
        d.addCallback(_check_retrieve)

        return d

    def test_status_numbers(self):
        drrm = status.DownloadResultsRendererMixin()
        self.failUnlessEqual(drrm.render_time(None, None), "")
        self.failUnlessEqual(drrm.render_time(None, 2.5), "2.50s")
        self.failUnlessEqual(drrm.render_time(None, 0.25), "250ms")
        self.failUnlessEqual(drrm.render_time(None, 0.0021), "2.1ms")
        self.failUnlessEqual(drrm.render_time(None, 0.000123), "123us")
        self.failUnlessEqual(drrm.render_rate(None, None), "")
        self.failUnlessEqual(drrm.render_rate(None, 2500000), "2.50MBps")
        self.failUnlessEqual(drrm.render_rate(None, 30100), "30.1kBps")
        self.failUnlessEqual(drrm.render_rate(None, 123), "123Bps")

        urrm = status.UploadResultsRendererMixin()
        self.failUnlessEqual(urrm.render_time(None, None), "")
        self.failUnlessEqual(urrm.render_time(None, 2.5), "2.50s")
        self.failUnlessEqual(urrm.render_time(None, 0.25), "250ms")
        self.failUnlessEqual(urrm.render_time(None, 0.0021), "2.1ms")
        self.failUnlessEqual(urrm.render_time(None, 0.000123), "123us")
        self.failUnlessEqual(urrm.render_rate(None, None), "")
        self.failUnlessEqual(urrm.render_rate(None, 2500000), "2.50MBps")
        self.failUnlessEqual(urrm.render_rate(None, 30100), "30.1kBps")
        self.failUnlessEqual(urrm.render_rate(None, 123), "123Bps")

    def test_GET_FILEURL(self):
        d = self.GET(self.public_url + "/foo/bar.txt")
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_GET_FILEURL_range(self):
        headers = {"range": "bytes=1-10"}
        d = self.GET(self.public_url + "/foo/bar.txt", headers=headers,
                     return_response=True)
        def _got((res, status, headers)):
            self.failUnlessEqual(int(status), 206)
            self.failUnless(headers.has_key("content-range"))
            self.failUnlessEqual(headers["content-range"][0],
                                 "bytes 1-10/%d" % len(self.BAR_CONTENTS))
            self.failUnlessEqual(res, self.BAR_CONTENTS[1:11])
        d.addCallback(_got)
        return d

    def test_GET_FILEURL_partial_range(self):
        headers = {"range": "bytes=5-"}
        length  = len(self.BAR_CONTENTS)
        d = self.GET(self.public_url + "/foo/bar.txt", headers=headers,
                     return_response=True)
        def _got((res, status, headers)):
            self.failUnlessEqual(int(status), 206)
            self.failUnless(headers.has_key("content-range"))
            self.failUnlessEqual(headers["content-range"][0],
                                 "bytes 5-%d/%d" % (length-1, length))
            self.failUnlessEqual(res, self.BAR_CONTENTS[5:])
        d.addCallback(_got)
        return d

    def test_HEAD_FILEURL_range(self):
        headers = {"range": "bytes=1-10"}
        d = self.HEAD(self.public_url + "/foo/bar.txt", headers=headers,
                     return_response=True)
        def _got((res, status, headers)):
            self.failUnlessEqual(res, "")
            self.failUnlessEqual(int(status), 206)
            self.failUnless(headers.has_key("content-range"))
            self.failUnlessEqual(headers["content-range"][0],
                                 "bytes 1-10/%d" % len(self.BAR_CONTENTS))
        d.addCallback(_got)
        return d

    def test_HEAD_FILEURL_partial_range(self):
        headers = {"range": "bytes=5-"}
        length  = len(self.BAR_CONTENTS)
        d = self.HEAD(self.public_url + "/foo/bar.txt", headers=headers,
                     return_response=True)
        def _got((res, status, headers)):
            self.failUnlessEqual(int(status), 206)
            self.failUnless(headers.has_key("content-range"))
            self.failUnlessEqual(headers["content-range"][0],
                                 "bytes 5-%d/%d" % (length-1, length))
        d.addCallback(_got)
        return d

    def test_GET_FILEURL_range_bad(self):
        headers = {"range": "BOGUS=fizbop-quarnak"}
        d = self.shouldFail2(error.Error, "test_GET_FILEURL_range_bad",
                             "400 Bad Request",
                             "Syntactically invalid http range header",
                             self.GET, self.public_url + "/foo/bar.txt",
                             headers=headers)
        return d

    def test_HEAD_FILEURL(self):
        d = self.HEAD(self.public_url + "/foo/bar.txt", return_response=True)
        def _got((res, status, headers)):
            self.failUnlessEqual(res, "")
            self.failUnlessEqual(headers["content-length"][0],
                                 str(len(self.BAR_CONTENTS)))
            self.failUnlessEqual(headers["content-type"], ["text/plain"])
        d.addCallback(_got)
        return d

    def test_GET_FILEURL_named(self):
        base = "/file/%s" % urllib.quote(self._bar_txt_uri)
        base2 = "/named/%s" % urllib.quote(self._bar_txt_uri)
        d = self.GET(base + "/@@name=/blah.txt")
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(base + "/blah.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(base + "/ignore/lots/blah.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(base2 + "/@@name=/blah.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        save_url = base + "?save=true&filename=blah.txt"
        d.addCallback(lambda res: self.GET(save_url))
        d.addCallback(self.failUnlessIsBarDotTxt) # TODO: check headers
        u_filename = u"n\u00e9wer.txt" # n e-acute w e r . t x t
        u_fn_e = urllib.quote(u_filename.encode("utf-8"))
        u_url = base + "?save=true&filename=" + u_fn_e
        d.addCallback(lambda res: self.GET(u_url))
        d.addCallback(self.failUnlessIsBarDotTxt) # TODO: check headers
        return d

    def test_PUT_FILEURL_named_bad(self):
        base = "/file/%s" % urllib.quote(self._bar_txt_uri)
        d = self.shouldFail2(error.Error, "test_PUT_FILEURL_named_bad",
                             "400 Bad Request",
                             "/file can only be used with GET or HEAD",
                             self.PUT, base + "/@@name=/blah.txt", "")
        return d

    def test_GET_DIRURL_named_bad(self):
        base = "/file/%s" % urllib.quote(self._foo_uri)
        d = self.shouldFail2(error.Error, "test_PUT_DIRURL_named_bad",
                             "400 Bad Request",
                             "is not a file-cap",
                             self.GET, base + "/@@name=/blah.txt")
        return d

    def test_GET_slash_file_bad(self):
        d = self.shouldFail2(error.Error, "test_GET_slash_file_bad",
                             "404 Not Found",
                             "/file must be followed by a file-cap and a name",
                             self.GET, "/file")
        return d

    def test_GET_unhandled_URI_named(self):
        contents, n, newuri = self.makefile(12)
        verifier_cap = n.get_verify_cap().to_string()
        base = "/file/%s" % urllib.quote(verifier_cap)
        # client.create_node_from_uri() can't handle verify-caps
        d = self.shouldFail2(error.Error, "GET_unhandled_URI_named",
                             "400 Bad Request", "is not a file-cap",
                             self.GET, base)
        return d

    def test_GET_unhandled_URI(self):
        contents, n, newuri = self.makefile(12)
        verifier_cap = n.get_verify_cap().to_string()
        base = "/uri/%s" % urllib.quote(verifier_cap)
        # client.create_node_from_uri() can't handle verify-caps
        d = self.shouldFail2(error.Error, "test_GET_unhandled_URI",
                             "400 Bad Request",
                             "GET unknown URI type: can only do t=info",
                             self.GET, base)
        return d

    def test_GET_FILE_URI(self):
        base = "/uri/%s" % urllib.quote(self._bar_txt_uri)
        d = self.GET(base)
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_GET_FILE_URI_badchild(self):
        base = "/uri/%s/boguschild" % urllib.quote(self._bar_txt_uri)
        errmsg = "Files have no children, certainly not named 'boguschild'"
        d = self.shouldFail2(error.Error, "test_GET_FILE_URI_badchild",
                             "400 Bad Request", errmsg,
                             self.GET, base)
        return d

    def test_PUT_FILE_URI_badchild(self):
        base = "/uri/%s/boguschild" % urllib.quote(self._bar_txt_uri)
        errmsg = "Cannot create directory 'boguschild', because its parent is a file, not a directory"
        d = self.shouldFail2(error.Error, "test_GET_FILE_URI_badchild",
                             "400 Bad Request", errmsg,
                             self.PUT, base, "")
        return d

    def test_GET_FILEURL_save(self):
        d = self.GET(self.public_url + "/foo/bar.txt?filename=bar.txt&save=true")
        # TODO: look at the headers, expect a Content-Disposition: attachment
        # header.
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_GET_FILEURL_missing(self):
        d = self.GET(self.public_url + "/foo/missing")
        d.addBoth(self.should404, "test_GET_FILEURL_missing")
        return d

    def test_PUT_overwrite_only_files(self):
        # create a directory, put a file in that directory.
        contents, n, filecap = self.makefile(8)
        d = self.PUT(self.public_url + "/foo/dir?t=mkdir", "")
        d.addCallback(lambda res:
            self.PUT(self.public_url + "/foo/dir/file1.txt",
                     self.NEWFILE_CONTENTS))
        # try to overwrite the file with replace=only-files
        # (this should work)
        d.addCallback(lambda res:
            self.PUT(self.public_url + "/foo/dir/file1.txt?t=uri&replace=only-files",
                     filecap))
        d.addCallback(lambda res:
            self.shouldFail2(error.Error, "PUT_bad_t", "409 Conflict",
                 "There was already a child by that name, and you asked me "
                 "to not replace it",
                 self.PUT, self.public_url + "/foo/dir?t=uri&replace=only-files",
                 filecap))
        return d

    def test_PUT_NEWFILEURL(self):
        d = self.PUT(self.public_url + "/foo/new.txt", self.NEWFILE_CONTENTS)
        # TODO: we lose the response code, so we can't check this
        #self.failUnlessEqual(responsecode, 201)
        d.addCallback(self.failUnlessURIMatchesChild, self._foo_node, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"new.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_PUT_NEWFILEURL_not_mutable(self):
        d = self.PUT(self.public_url + "/foo/new.txt?mutable=false",
                     self.NEWFILE_CONTENTS)
        # TODO: we lose the response code, so we can't check this
        #self.failUnlessEqual(responsecode, 201)
        d.addCallback(self.failUnlessURIMatchesChild, self._foo_node, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"new.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_PUT_NEWFILEURL_range_bad(self):
        headers = {"content-range": "bytes 1-10/%d" % len(self.NEWFILE_CONTENTS)}
        target = self.public_url + "/foo/new.txt"
        d = self.shouldFail2(error.Error, "test_PUT_NEWFILEURL_range_bad",
                             "501 Not Implemented",
                             "Content-Range in PUT not yet supported",
                             # (and certainly not for immutable files)
                             self.PUT, target, self.NEWFILE_CONTENTS[1:11],
                             headers=headers)
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self._foo_node, u"new.txt"))
        return d

    def test_PUT_NEWFILEURL_mutable(self):
        d = self.PUT(self.public_url + "/foo/new.txt?mutable=true",
                     self.NEWFILE_CONTENTS)
        # TODO: we lose the response code, so we can't check this
        #self.failUnlessEqual(responsecode, 201)
        def _check_uri(res):
            u = uri.from_string_mutable_filenode(res)
            self.failUnless(u.is_mutable())
            self.failIf(u.is_readonly())
            return res
        d.addCallback(_check_uri)
        d.addCallback(self.failUnlessURIMatchesChild, self._foo_node, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessMutableChildContentsAre(self._foo_node,
                                                             u"new.txt",
                                                             self.NEWFILE_CONTENTS))
        return d

    def test_PUT_NEWFILEURL_mutable_toobig(self):
        d = self.shouldFail2(error.Error, "test_PUT_NEWFILEURL_mutable_toobig",
                             "413 Request Entity Too Large",
                             "SDMF is limited to one segment, and 10001 > 10000",
                             self.PUT,
                             self.public_url + "/foo/new.txt?mutable=true",
                             "b" * (self.s.MUTABLE_SIZELIMIT+1))
        return d

    def test_PUT_NEWFILEURL_replace(self):
        d = self.PUT(self.public_url + "/foo/bar.txt", self.NEWFILE_CONTENTS)
        # TODO: we lose the response code, so we can't check this
        #self.failUnlessEqual(responsecode, 200)
        d.addCallback(self.failUnlessURIMatchesChild, self._foo_node, u"bar.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"bar.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_PUT_NEWFILEURL_bad_t(self):
        d = self.shouldFail2(error.Error, "PUT_bad_t", "400 Bad Request",
                             "PUT to a file: bad t=bogus",
                             self.PUT, self.public_url + "/foo/bar.txt?t=bogus",
                             "contents")
        return d

    def test_PUT_NEWFILEURL_no_replace(self):
        d = self.PUT(self.public_url + "/foo/bar.txt?replace=false",
                     self.NEWFILE_CONTENTS)
        d.addBoth(self.shouldFail, error.Error, "PUT_NEWFILEURL_no_replace",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        return d

    def test_PUT_NEWFILEURL_mkdirs(self):
        d = self.PUT(self.public_url + "/foo/newdir/new.txt", self.NEWFILE_CONTENTS)
        fn = self._foo_node
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"newdir/new.txt")
        d.addCallback(lambda res: self.failIfNodeHasChild(fn, u"new.txt"))
        d.addCallback(lambda res: self.failUnlessNodeHasChild(fn, u"newdir"))
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, u"newdir/new.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_PUT_NEWFILEURL_blocked(self):
        d = self.PUT(self.public_url + "/foo/blockingfile/new.txt",
                     self.NEWFILE_CONTENTS)
        d.addBoth(self.shouldFail, error.Error, "PUT_NEWFILEURL_blocked",
                  "409 Conflict",
                  "Unable to create directory 'blockingfile': a file was in the way")
        return d

    def test_DELETE_FILEURL(self):
        d = self.DELETE(self.public_url + "/foo/bar.txt")
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self._foo_node, u"bar.txt"))
        return d

    def test_DELETE_FILEURL_missing(self):
        d = self.DELETE(self.public_url + "/foo/missing")
        d.addBoth(self.should404, "test_DELETE_FILEURL_missing")
        return d

    def test_DELETE_FILEURL_missing2(self):
        d = self.DELETE(self.public_url + "/missing/missing")
        d.addBoth(self.should404, "test_DELETE_FILEURL_missing2")
        return d

    def test_GET_FILEURL_json(self):
        # twisted.web.http.parse_qs ignores any query args without an '=', so
        # I can't do "GET /path?json", I have to do "GET /path/t=json"
        # instead. This may make it tricky to emulate the S3 interface
        # completely.
        d = self.GET(self.public_url + "/foo/bar.txt?t=json")
        d.addCallback(self.failUnlessIsBarJSON)
        return d

    def test_GET_FILEURL_json_missing(self):
        d = self.GET(self.public_url + "/foo/missing?json")
        d.addBoth(self.should404, "test_GET_FILEURL_json_missing")
        return d

    def test_GET_FILEURL_uri(self):
        d = self.GET(self.public_url + "/foo/bar.txt?t=uri")
        def _check(res):
            self.failUnlessEqual(res, self._bar_txt_uri)
        d.addCallback(_check)
        d.addCallback(lambda res:
                      self.GET(self.public_url + "/foo/bar.txt?t=readonly-uri"))
        def _check2(res):
            # for now, for files, uris and readonly-uris are the same
            self.failUnlessEqual(res, self._bar_txt_uri)
        d.addCallback(_check2)
        return d

    def test_GET_FILEURL_badtype(self):
        d = self.shouldHTTPError("GET t=bogus", 400, "Bad Request",
                                 "bad t=bogus",
                                 self.GET,
                                 self.public_url + "/foo/bar.txt?t=bogus")
        return d

    def test_GET_FILEURL_uri_missing(self):
        d = self.GET(self.public_url + "/foo/missing?t=uri")
        d.addBoth(self.should404, "test_GET_FILEURL_uri_missing")
        return d

    def test_GET_DIRURL(self):
        # the addSlash means we get a redirect here
        # from /uri/$URI/foo/ , we need ../../../ to get back to the root
        ROOT = "../../.."
        d = self.GET(self.public_url + "/foo", followRedirect=True)
        def _check(res):
            self.failUnless(('<a href="%s">Return to Welcome page' % ROOT)
                            in res, res)
            # the FILE reference points to a URI, but it should end in bar.txt
            bar_url = ("%s/file/%s/@@named=/bar.txt" %
                       (ROOT, urllib.quote(self._bar_txt_uri)))
            get_bar = "".join([r'<td>FILE</td>',
                               r'\s+<td>',
                               r'<a href="%s">bar.txt</a>' % bar_url,
                               r'</td>',
                               r'\s+<td>%d</td>' % len(self.BAR_CONTENTS),
                               ])
            self.failUnless(re.search(get_bar, res), res)
            for line in res.split("\n"):
                # find the line that contains the delete button for bar.txt
                if ("form action" in line and
                    'value="delete"' in line and
                    'value="bar.txt"' in line):
                    # the form target should use a relative URL
                    foo_url = urllib.quote("%s/uri/%s/" % (ROOT, self._foo_uri))
                    self.failUnless(('action="%s"' % foo_url) in line, line)
                    # and the when_done= should too
                    #done_url = urllib.quote(???)
                    #self.failUnless(('name="when_done" value="%s"' % done_url)
                    #                in line, line)
                    break
            else:
                self.fail("unable to find delete-bar.txt line", res)

            # the DIR reference just points to a URI
            sub_url = ("%s/uri/%s/" % (ROOT, urllib.quote(self._sub_uri)))
            get_sub = ((r'<td>DIR</td>')
                       +r'\s+<td><a href="%s">sub</a></td>' % sub_url)
            self.failUnless(re.search(get_sub, res), res)
        d.addCallback(_check)

        # look at a directory which is readonly
        d.addCallback(lambda res:
                      self.GET(self.public_url + "/reedownlee", followRedirect=True))
        def _check2(res):
            self.failUnless("(read-only)" in res, res)
            self.failIf("Upload a file" in res, res)
        d.addCallback(_check2)

        # and at a directory that contains a readonly directory
        d.addCallback(lambda res:
                      self.GET(self.public_url, followRedirect=True))
        def _check3(res):
            self.failUnless(re.search('<td>DIR-RO</td>'
                                      r'\s+<td><a href="[\.\/]+/uri/URI%3ADIR2-RO%3A[^"]+">reedownlee</a></td>', res), res)
        d.addCallback(_check3)

        # and an empty directory
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/empty/"))
        def _check4(res):
            self.failUnless("directory is empty" in res, res)
            MKDIR_BUTTON_RE=re.compile('<input type="hidden" name="t" value="mkdir" />.*<legend class="freeform-form-label">Create a new directory in this directory</legend>.*<input type="submit" value="Create" />', re.I)
            self.failUnless(MKDIR_BUTTON_RE.search(res), res)
        d.addCallback(_check4)

        return d

    def test_GET_DIRURL_badtype(self):
        d = self.shouldHTTPError("test_GET_DIRURL_badtype",
                                 400, "Bad Request",
                                 "bad t=bogus",
                                 self.GET,
                                 self.public_url + "/foo?t=bogus")
        return d

    def test_GET_DIRURL_json(self):
        d = self.GET(self.public_url + "/foo?t=json")
        d.addCallback(self.failUnlessIsFooJSON)
        return d


    def test_POST_DIRURL_manifest_no_ophandle(self):
        d = self.shouldFail2(error.Error,
                             "test_POST_DIRURL_manifest_no_ophandle",
                             "400 Bad Request",
                             "slow operation requires ophandle=",
                             self.POST, self.public_url, t="start-manifest")
        return d

    def test_POST_DIRURL_manifest(self):
        d = defer.succeed(None)
        def getman(ignored, output):
            d = self.POST(self.public_url + "/foo/?t=start-manifest&ophandle=125",
                          followRedirect=True)
            d.addCallback(self.wait_for_operation, "125")
            d.addCallback(self.get_operation_results, "125", output)
            return d
        d.addCallback(getman, None)
        def _got_html(manifest):
            self.failUnless("Manifest of SI=" in manifest)
            self.failUnless("<td>sub</td>" in manifest)
            self.failUnless(self._sub_uri in manifest)
            self.failUnless("<td>sub/baz.txt</td>" in manifest)
        d.addCallback(_got_html)

        # both t=status and unadorned GET should be identical
        d.addCallback(lambda res: self.GET("/operations/125"))
        d.addCallback(_got_html)

        d.addCallback(getman, "html")
        d.addCallback(_got_html)
        d.addCallback(getman, "text")
        def _got_text(manifest):
            self.failUnless("\nsub " + self._sub_uri + "\n" in manifest)
            self.failUnless("\nsub/baz.txt URI:CHK:" in manifest)
        d.addCallback(_got_text)
        d.addCallback(getman, "JSON")
        def _got_json(res):
            data = res["manifest"]
            got = {}
            for (path_list, cap) in data:
                got[tuple(path_list)] = cap
            self.failUnlessEqual(got[(u"sub",)], self._sub_uri)
            self.failUnless((u"sub",u"baz.txt") in got)
            self.failUnless("finished" in res)
            self.failUnless("origin" in res)
            self.failUnless("storage-index" in res)
            self.failUnless("verifycaps" in res)
            self.failUnless("stats" in res)
        d.addCallback(_got_json)
        return d

    def test_POST_DIRURL_deepsize_no_ophandle(self):
        d = self.shouldFail2(error.Error,
                             "test_POST_DIRURL_deepsize_no_ophandle",
                             "400 Bad Request",
                             "slow operation requires ophandle=",
                             self.POST, self.public_url, t="start-deep-size")
        return d

    def test_POST_DIRURL_deepsize(self):
        d = self.POST(self.public_url + "/foo/?t=start-deep-size&ophandle=126",
                      followRedirect=True)
        d.addCallback(self.wait_for_operation, "126")
        d.addCallback(self.get_operation_results, "126", "json")
        def _got_json(data):
            self.failUnlessEqual(data["finished"], True)
            size = data["size"]
            self.failUnless(size > 1000)
        d.addCallback(_got_json)
        d.addCallback(self.get_operation_results, "126", "text")
        def _got_text(res):
            mo = re.search(r'^size: (\d+)$', res, re.M)
            self.failUnless(mo, res)
            size = int(mo.group(1))
            # with directories, the size varies.
            self.failUnless(size > 1000)
        d.addCallback(_got_text)
        return d

    def test_POST_DIRURL_deepstats_no_ophandle(self):
        d = self.shouldFail2(error.Error,
                             "test_POST_DIRURL_deepstats_no_ophandle",
                             "400 Bad Request",
                             "slow operation requires ophandle=",
                             self.POST, self.public_url, t="start-deep-stats")
        return d

    def test_POST_DIRURL_deepstats(self):
        d = self.POST(self.public_url + "/foo/?t=start-deep-stats&ophandle=127",
                      followRedirect=True)
        d.addCallback(self.wait_for_operation, "127")
        d.addCallback(self.get_operation_results, "127", "json")
        def _got_json(stats):
            expected = {"count-immutable-files": 3,
                        "count-mutable-files": 0,
                        "count-literal-files": 0,
                        "count-files": 3,
                        "count-directories": 3,
                        "size-immutable-files": 57,
                        "size-literal-files": 0,
                        #"size-directories": 1912, # varies
                        #"largest-directory": 1590,
                        "largest-directory-children": 5,
                        "largest-immutable-file": 19,
                        }
            for k,v in expected.iteritems():
                self.failUnlessEqual(stats[k], v,
                                     "stats[%s] was %s, not %s" %
                                     (k, stats[k], v))
            self.failUnlessEqual(stats["size-files-histogram"],
                                 [ [11, 31, 3] ])
        d.addCallback(_got_json)
        return d

    def test_POST_DIRURL_stream_manifest(self):
        d = self.POST(self.public_url + "/foo/?t=stream-manifest")
        def _check(res):
            self.failUnless(res.endswith("\n"))
            units = [simplejson.loads(t) for t in res[:-1].split("\n")]
            self.failUnlessEqual(len(units), 7)
            self.failUnlessEqual(units[-1]["type"], "stats")
            first = units[0]
            self.failUnlessEqual(first["path"], [])
            self.failUnlessEqual(first["cap"], self._foo_uri)
            self.failUnlessEqual(first["type"], "directory")
            baz = [u for u in units[:-1] if u["cap"] == self._baz_file_uri][0]
            self.failUnlessEqual(baz["path"], ["sub", "baz.txt"])
            self.failIfEqual(baz["storage-index"], None)
            self.failIfEqual(baz["verifycap"], None)
            self.failIfEqual(baz["repaircap"], None)
            return
        d.addCallback(_check)
        return d

    def test_GET_DIRURL_uri(self):
        d = self.GET(self.public_url + "/foo?t=uri")
        def _check(res):
            self.failUnlessEqual(res, self._foo_uri)
        d.addCallback(_check)
        return d

    def test_GET_DIRURL_readonly_uri(self):
        d = self.GET(self.public_url + "/foo?t=readonly-uri")
        def _check(res):
            self.failUnlessEqual(res, self._foo_readonly_uri)
        d.addCallback(_check)
        return d

    def test_PUT_NEWDIRURL(self):
        d = self.PUT(self.public_url + "/foo/newdir?t=mkdir", "")
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"newdir"))
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_NEWDIRURL_initial_children(self):
        (newkids, filecap1, filecap2, filecap3,
         dircap) = self._create_initial_children()
        d = self.POST(self.public_url + "/foo/newdir?t=mkdir-with-children",
                     children=simplejson.dumps(newkids))
        def _check(uri):
            n = self.s.create_node_from_uri(uri.strip())
            d2 = self.failUnlessNodeKeysAre(n, newkids.keys())
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"child-imm", filecap1))
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"child-mutable",
                                                     filecap2))
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"child-mutable-ro",
                                                     filecap3))
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"dirchild", dircap))
            return d2
        d.addCallback(_check)
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"newdir"))
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, newkids.keys())
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessChildURIIs, u"child-imm", filecap1)
        return d

    def test_PUT_NEWDIRURL_exists(self):
        d = self.PUT(self.public_url + "/foo/sub?t=mkdir", "")
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"sub"))
        d.addCallback(lambda res: self._foo_node.get(u"sub"))
        d.addCallback(self.failUnlessNodeKeysAre, [u"baz.txt"])
        return d

    def test_PUT_NEWDIRURL_blocked(self):
        d = self.shouldFail2(error.Error, "PUT_NEWDIRURL_blocked",
                             "409 Conflict", "Unable to create directory 'bar.txt': a file was in the way",
                             self.PUT,
                             self.public_url + "/foo/bar.txt/sub?t=mkdir", "")
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"sub"))
        d.addCallback(lambda res: self._foo_node.get(u"sub"))
        d.addCallback(self.failUnlessNodeKeysAre, [u"baz.txt"])
        return d

    def test_PUT_NEWDIRURL_mkdir_p(self):
        d = defer.succeed(None)
        d.addCallback(lambda res: self.POST(self.public_url + "/foo", t='mkdir', name='mkp'))
        d.addCallback(lambda res: self.failUnlessNodeHasChild(self._foo_node, u"mkp"))
        d.addCallback(lambda res: self._foo_node.get(u"mkp"))
        def mkdir_p(mkpnode):
            url = '/uri/%s?t=mkdir-p&path=/sub1/sub2' % urllib.quote(mkpnode.get_uri())
            d = self.POST(url)
            def made_subsub(ssuri):
                d = self._foo_node.get_child_at_path(u"mkp/sub1/sub2")
                d.addCallback(lambda ssnode: self.failUnlessEqual(ssnode.get_uri(), ssuri))
                d = self.POST(url)
                d.addCallback(lambda uri2: self.failUnlessEqual(uri2, ssuri))
                return d
            d.addCallback(made_subsub)
            return d
        d.addCallback(mkdir_p)
        return d

    def test_PUT_NEWDIRURL_mkdirs(self):
        d = self.PUT(self.public_url + "/foo/subdir/newdir?t=mkdir", "")
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self._foo_node, u"newdir"))
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"subdir"))
        d.addCallback(lambda res:
                      self._foo_node.get_child_at_path(u"subdir/newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_DELETE_DIRURL(self):
        d = self.DELETE(self.public_url + "/foo")
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self.public_root, u"foo"))
        return d

    def test_DELETE_DIRURL_missing(self):
        d = self.DELETE(self.public_url + "/foo/missing")
        d.addBoth(self.should404, "test_DELETE_DIRURL_missing")
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self.public_root, u"foo"))
        return d

    def test_DELETE_DIRURL_missing2(self):
        d = self.DELETE(self.public_url + "/missing")
        d.addBoth(self.should404, "test_DELETE_DIRURL_missing2")
        return d

    def dump_root(self):
        print "NODEWALK"
        w = webish.DirnodeWalkerMixin()
        def visitor(childpath, childnode, metadata):
            print childpath
        d = w.walk(self.public_root, visitor)
        return d

    def failUnlessNodeKeysAre(self, node, expected_keys):
        for k in expected_keys:
            assert isinstance(k, unicode)
        d = node.list()
        def _check(children):
            self.failUnlessEqual(sorted(children.keys()), sorted(expected_keys))
        d.addCallback(_check)
        return d
    def failUnlessNodeHasChild(self, node, name):
        assert isinstance(name, unicode)
        d = node.list()
        def _check(children):
            self.failUnless(name in children)
        d.addCallback(_check)
        return d
    def failIfNodeHasChild(self, node, name):
        assert isinstance(name, unicode)
        d = node.list()
        def _check(children):
            self.failIf(name in children)
        d.addCallback(_check)
        return d

    def failUnlessChildContentsAre(self, node, name, expected_contents):
        assert isinstance(name, unicode)
        d = node.get_child_at_path(name)
        d.addCallback(lambda node: node.download_to_data())
        def _check(contents):
            self.failUnlessEqual(contents, expected_contents)
        d.addCallback(_check)
        return d

    def failUnlessMutableChildContentsAre(self, node, name, expected_contents):
        assert isinstance(name, unicode)
        d = node.get_child_at_path(name)
        d.addCallback(lambda node: node.download_best_version())
        def _check(contents):
            self.failUnlessEqual(contents, expected_contents)
        d.addCallback(_check)
        return d

    def failUnlessChildURIIs(self, node, name, expected_uri):
        assert isinstance(name, unicode)
        d = node.get_child_at_path(name)
        def _check(child):
            self.failUnlessEqual(child.get_uri(), expected_uri.strip())
        d.addCallback(_check)
        return d

    def failUnlessURIMatchesChild(self, got_uri, node, name):
        assert isinstance(name, unicode)
        d = node.get_child_at_path(name)
        def _check(child):
            self.failUnlessEqual(got_uri.strip(), child.get_uri())
        d.addCallback(_check)
        return d

    def failUnlessCHKURIHasContents(self, got_uri, contents):
        self.failUnless(FakeCHKFileNode.all_contents[got_uri] == contents)

    def test_POST_upload(self):
        d = self.POST(self.public_url + "/foo", t="upload",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        fn = self._foo_node
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, u"new.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_POST_upload_unicode(self):
        filename = u"n\u00e9wer.txt" # n e-acute w e r . t x t
        d = self.POST(self.public_url + "/foo", t="upload",
                      file=(filename, self.NEWFILE_CONTENTS))
        fn = self._foo_node
        d.addCallback(self.failUnlessURIMatchesChild, fn, filename)
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, filename,
                                                      self.NEWFILE_CONTENTS))
        target_url = self.public_url + "/foo/" + filename.encode("utf-8")
        d.addCallback(lambda res: self.GET(target_url))
        d.addCallback(lambda contents: self.failUnlessEqual(contents,
                                                            self.NEWFILE_CONTENTS,
                                                            contents))
        return d

    def test_POST_upload_unicode_named(self):
        filename = u"n\u00e9wer.txt" # n e-acute w e r . t x t
        d = self.POST(self.public_url + "/foo", t="upload",
                      name=filename,
                      file=("overridden", self.NEWFILE_CONTENTS))
        fn = self._foo_node
        d.addCallback(self.failUnlessURIMatchesChild, fn, filename)
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, filename,
                                                      self.NEWFILE_CONTENTS))
        target_url = self.public_url + "/foo/" + filename.encode("utf-8")
        d.addCallback(lambda res: self.GET(target_url))
        d.addCallback(lambda contents: self.failUnlessEqual(contents,
                                                            self.NEWFILE_CONTENTS,
                                                            contents))
        return d

    def test_POST_upload_no_link(self):
        d = self.POST("/uri", t="upload",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        def _check_upload_results(page):
            # this should be a page which describes the results of the upload
            # that just finished.
            self.failUnless("Upload Results:" in page)
            self.failUnless("URI:" in page)
            uri_re = re.compile("URI: <tt><span>(.*)</span>")
            mo = uri_re.search(page)
            self.failUnless(mo, page)
            new_uri = mo.group(1)
            return new_uri
        d.addCallback(_check_upload_results)
        d.addCallback(self.failUnlessCHKURIHasContents, self.NEWFILE_CONTENTS)
        return d

    def test_POST_upload_no_link_whendone(self):
        d = self.POST("/uri", t="upload", when_done="/",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        d.addBoth(self.shouldRedirect, "/")
        return d

    def shouldRedirect2(self, which, checker, callable, *args, **kwargs):
        d = defer.maybeDeferred(callable, *args, **kwargs)
        def done(res):
            if isinstance(res, failure.Failure):
                res.trap(error.PageRedirect)
                statuscode = res.value.status
                target = res.value.location
                return checker(statuscode, target)
            self.fail("%s: callable was supposed to redirect, not return '%s'"
                      % (which, res))
        d.addBoth(done)
        return d

    def test_POST_upload_no_link_whendone_results(self):
        def check(statuscode, target):
            self.failUnlessEqual(statuscode, str(http.FOUND))
            self.failUnless(target.startswith(self.webish_url), target)
            return client.getPage(target, method="GET")
        d = self.shouldRedirect2("test_POST_upload_no_link_whendone_results",
                                 check,
                                 self.POST, "/uri", t="upload",
                                 when_done="/uri/%(uri)s",
                                 file=("new.txt", self.NEWFILE_CONTENTS))
        d.addCallback(lambda res:
                      self.failUnlessEqual(res, self.NEWFILE_CONTENTS))
        return d

    def test_POST_upload_no_link_mutable(self):
        d = self.POST("/uri", t="upload", mutable="true",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        def _check(filecap):
            filecap = filecap.strip()
            self.failUnless(filecap.startswith("URI:SSK:"), filecap)
            self.filecap = filecap
            u = uri.WriteableSSKFileURI.init_from_string(filecap)
            self.failUnless(u.storage_index in FakeMutableFileNode.all_contents)
            n = self.s.create_node_from_uri(filecap)
            return n.download_best_version()
        d.addCallback(_check)
        def _check2(data):
            self.failUnlessEqual(data, self.NEWFILE_CONTENTS)
            return self.GET("/uri/%s" % urllib.quote(self.filecap))
        d.addCallback(_check2)
        def _check3(data):
            self.failUnlessEqual(data, self.NEWFILE_CONTENTS)
            return self.GET("/file/%s" % urllib.quote(self.filecap))
        d.addCallback(_check3)
        def _check4(data):
            self.failUnlessEqual(data, self.NEWFILE_CONTENTS)
        d.addCallback(_check4)
        return d

    def test_POST_upload_no_link_mutable_toobig(self):
        d = self.shouldFail2(error.Error,
                             "test_POST_upload_no_link_mutable_toobig",
                             "413 Request Entity Too Large",
                             "SDMF is limited to one segment, and 10001 > 10000",
                             self.POST,
                             "/uri", t="upload", mutable="true",
                             file=("new.txt",
                                   "b" * (self.s.MUTABLE_SIZELIMIT+1)) )
        return d

    def test_POST_upload_mutable(self):
        # this creates a mutable file
        d = self.POST(self.public_url + "/foo", t="upload", mutable="true",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        fn = self._foo_node
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessMutableChildContentsAre(fn, u"new.txt",
                                                             self.NEWFILE_CONTENTS))
        d.addCallback(lambda res: self._foo_node.get(u"new.txt"))
        def _got(newnode):
            self.failUnless(IMutableFileNode.providedBy(newnode))
            self.failUnless(newnode.is_mutable())
            self.failIf(newnode.is_readonly())
            self._mutable_node = newnode
            self._mutable_uri = newnode.get_uri()
        d.addCallback(_got)

        # now upload it again and make sure that the URI doesn't change
        NEWER_CONTENTS = self.NEWFILE_CONTENTS + "newer\n"
        d.addCallback(lambda res:
                      self.POST(self.public_url + "/foo", t="upload",
                                mutable="true",
                                file=("new.txt", NEWER_CONTENTS)))
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessMutableChildContentsAre(fn, u"new.txt",
                                                             NEWER_CONTENTS))
        d.addCallback(lambda res: self._foo_node.get(u"new.txt"))
        def _got2(newnode):
            self.failUnless(IMutableFileNode.providedBy(newnode))
            self.failUnless(newnode.is_mutable())
            self.failIf(newnode.is_readonly())
            self.failUnlessEqual(self._mutable_uri, newnode.get_uri())
        d.addCallback(_got2)

        # upload a second time, using PUT instead of POST
        NEW2_CONTENTS = NEWER_CONTENTS + "overwrite with PUT\n"
        d.addCallback(lambda res:
                      self.PUT(self.public_url + "/foo/new.txt", NEW2_CONTENTS))
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessMutableChildContentsAre(fn, u"new.txt",
                                                             NEW2_CONTENTS))

        # finally list the directory, since mutable files are displayed
        # slightly differently

        d.addCallback(lambda res:
                      self.GET(self.public_url + "/foo/",
                               followRedirect=True))
        def _check_page(res):
            # TODO: assert more about the contents
            self.failUnless("SSK" in res)
            return res
        d.addCallback(_check_page)

        d.addCallback(lambda res: self._foo_node.get(u"new.txt"))
        def _got3(newnode):
            self.failUnless(IMutableFileNode.providedBy(newnode))
            self.failUnless(newnode.is_mutable())
            self.failIf(newnode.is_readonly())
            self.failUnlessEqual(self._mutable_uri, newnode.get_uri())
        d.addCallback(_got3)

        # look at the JSON form of the enclosing directory
        d.addCallback(lambda res:
                      self.GET(self.public_url + "/foo/?t=json",
                               followRedirect=True))
        def _check_page_json(res):
            parsed = simplejson.loads(res)
            self.failUnlessEqual(parsed[0], "dirnode")
            children = dict( [(unicode(name),value)
                              for (name,value)
                              in parsed[1]["children"].iteritems()] )
            self.failUnless("new.txt" in children)
            new_json = children["new.txt"]
            self.failUnlessEqual(new_json[0], "filenode")
            self.failUnless(new_json[1]["mutable"])
            self.failUnlessEqual(new_json[1]["rw_uri"], self._mutable_uri)
            ro_uri = unicode(self._mutable_node.get_readonly().to_string())
            self.failUnlessEqual(new_json[1]["ro_uri"], ro_uri)
        d.addCallback(_check_page_json)

        # and the JSON form of the file
        d.addCallback(lambda res:
                      self.GET(self.public_url + "/foo/new.txt?t=json"))
        def _check_file_json(res):
            parsed = simplejson.loads(res)
            self.failUnlessEqual(parsed[0], "filenode")
            self.failUnless(parsed[1]["mutable"])
            self.failUnlessEqual(parsed[1]["rw_uri"], self._mutable_uri)
            ro_uri = unicode(self._mutable_node.get_readonly().to_string())
            self.failUnlessEqual(parsed[1]["ro_uri"], ro_uri)
        d.addCallback(_check_file_json)

        # and look at t=uri and t=readonly-uri
        d.addCallback(lambda res:
                      self.GET(self.public_url + "/foo/new.txt?t=uri"))
        d.addCallback(lambda res: self.failUnlessEqual(res, self._mutable_uri))
        d.addCallback(lambda res:
                      self.GET(self.public_url + "/foo/new.txt?t=readonly-uri"))
        def _check_ro_uri(res):
            ro_uri = unicode(self._mutable_node.get_readonly().to_string())
            self.failUnlessEqual(res, ro_uri)
        d.addCallback(_check_ro_uri)

        # make sure we can get to it from /uri/URI
        d.addCallback(lambda res:
                      self.GET("/uri/%s" % urllib.quote(self._mutable_uri)))
        d.addCallback(lambda res:
                      self.failUnlessEqual(res, NEW2_CONTENTS))

        # and that HEAD computes the size correctly
        d.addCallback(lambda res:
                      self.HEAD(self.public_url + "/foo/new.txt",
                                return_response=True))
        def _got_headers((res, status, headers)):
            self.failUnlessEqual(res, "")
            self.failUnlessEqual(headers["content-length"][0],
                                 str(len(NEW2_CONTENTS)))
            self.failUnlessEqual(headers["content-type"], ["text/plain"])
        d.addCallback(_got_headers)

        # make sure that size errors are displayed correctly for overwrite
        d.addCallback(lambda res:
                      self.shouldFail2(error.Error,
                                       "test_POST_upload_mutable-toobig",
                                       "413 Request Entity Too Large",
                                       "SDMF is limited to one segment, and 10001 > 10000",
                                       self.POST,
                                       self.public_url + "/foo", t="upload",
                                       mutable="true",
                                       file=("new.txt",
                                             "b" * (self.s.MUTABLE_SIZELIMIT+1)),
                                       ))

        d.addErrback(self.dump_error)
        return d

    def test_POST_upload_mutable_toobig(self):
        d = self.shouldFail2(error.Error,
                             "test_POST_upload_mutable_toobig",
                             "413 Request Entity Too Large",
                             "SDMF is limited to one segment, and 10001 > 10000",
                             self.POST,
                             self.public_url + "/foo",
                             t="upload", mutable="true",
                             file=("new.txt",
                                   "b" * (self.s.MUTABLE_SIZELIMIT+1)) )
        return d

    def dump_error(self, f):
        # if the web server returns an error code (like 400 Bad Request),
        # web.client.getPage puts the HTTP response body into the .response
        # attribute of the exception object that it gives back. It does not
        # appear in the Failure's repr(), so the ERROR that trial displays
        # will be rather terse and unhelpful. addErrback this method to the
        # end of your chain to get more information out of these errors.
        if f.check(error.Error):
            print "web.error.Error:"
            print f
            print f.value.response
        return f

    def test_POST_upload_replace(self):
        d = self.POST(self.public_url + "/foo", t="upload",
                      file=("bar.txt", self.NEWFILE_CONTENTS))
        fn = self._foo_node
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"bar.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, u"bar.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_POST_upload_no_replace_ok(self):
        d = self.POST(self.public_url + "/foo?replace=false", t="upload",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/new.txt"))
        d.addCallback(lambda res: self.failUnlessEqual(res,
                                                       self.NEWFILE_CONTENTS))
        return d

    def test_POST_upload_no_replace_queryarg(self):
        d = self.POST(self.public_url + "/foo?replace=false", t="upload",
                      file=("bar.txt", self.NEWFILE_CONTENTS))
        d.addBoth(self.shouldFail, error.Error,
                  "POST_upload_no_replace_queryarg",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/bar.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_POST_upload_no_replace_field(self):
        d = self.POST(self.public_url + "/foo", t="upload", replace="false",
                      file=("bar.txt", self.NEWFILE_CONTENTS))
        d.addBoth(self.shouldFail, error.Error, "POST_upload_no_replace_field",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/bar.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_POST_upload_whendone(self):
        d = self.POST(self.public_url + "/foo", t="upload", when_done="/THERE",
                      file=("new.txt", self.NEWFILE_CONTENTS))
        d.addBoth(self.shouldRedirect, "/THERE")
        fn = self._foo_node
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, u"new.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_POST_upload_named(self):
        fn = self._foo_node
        d = self.POST(self.public_url + "/foo", t="upload",
                      name="new.txt", file=self.NEWFILE_CONTENTS)
        d.addCallback(self.failUnlessURIMatchesChild, fn, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(fn, u"new.txt",
                                                      self.NEWFILE_CONTENTS))
        return d

    def test_POST_upload_named_badfilename(self):
        d = self.POST(self.public_url + "/foo", t="upload",
                      name="slashes/are/bad.txt", file=self.NEWFILE_CONTENTS)
        d.addBoth(self.shouldFail, error.Error,
                  "test_POST_upload_named_badfilename",
                  "400 Bad Request",
                  "name= may not contain a slash",
                  )
        # make sure that nothing was added
        d.addCallback(lambda res:
                      self.failUnlessNodeKeysAre(self._foo_node,
                                                 [u"bar.txt", u"blockingfile",
                                                  u"empty", u"n\u00fc.txt",
                                                  u"sub"]))
        return d

    def test_POST_FILEURL_check(self):
        bar_url = self.public_url + "/foo/bar.txt"
        d = self.POST(bar_url, t="check")
        def _check(res):
            self.failUnless("Healthy :" in res)
        d.addCallback(_check)
        redir_url = "http://allmydata.org/TARGET"
        def _check2(statuscode, target):
            self.failUnlessEqual(statuscode, str(http.FOUND))
            self.failUnlessEqual(target, redir_url)
        d.addCallback(lambda res:
                      self.shouldRedirect2("test_POST_FILEURL_check",
                                           _check2,
                                           self.POST, bar_url,
                                           t="check",
                                           when_done=redir_url))
        d.addCallback(lambda res:
                      self.POST(bar_url, t="check", return_to=redir_url))
        def _check3(res):
            self.failUnless("Healthy :" in res)
            self.failUnless("Return to file" in res)
            self.failUnless(redir_url in res)
        d.addCallback(_check3)

        d.addCallback(lambda res:
                      self.POST(bar_url, t="check", output="JSON"))
        def _check_json(res):
            data = simplejson.loads(res)
            self.failUnless("storage-index" in data)
            self.failUnless(data["results"]["healthy"])
        d.addCallback(_check_json)

        return d

    def test_POST_FILEURL_check_and_repair(self):
        bar_url = self.public_url + "/foo/bar.txt"
        d = self.POST(bar_url, t="check", repair="true")
        def _check(res):
            self.failUnless("Healthy :" in res)
        d.addCallback(_check)
        redir_url = "http://allmydata.org/TARGET"
        def _check2(statuscode, target):
            self.failUnlessEqual(statuscode, str(http.FOUND))
            self.failUnlessEqual(target, redir_url)
        d.addCallback(lambda res:
                      self.shouldRedirect2("test_POST_FILEURL_check_and_repair",
                                           _check2,
                                           self.POST, bar_url,
                                           t="check", repair="true",
                                           when_done=redir_url))
        d.addCallback(lambda res:
                      self.POST(bar_url, t="check", return_to=redir_url))
        def _check3(res):
            self.failUnless("Healthy :" in res)
            self.failUnless("Return to file" in res)
            self.failUnless(redir_url in res)
        d.addCallback(_check3)
        return d

    def test_POST_DIRURL_check(self):
        foo_url = self.public_url + "/foo/"
        d = self.POST(foo_url, t="check")
        def _check(res):
            self.failUnless("Healthy :" in res, res)
        d.addCallback(_check)
        redir_url = "http://allmydata.org/TARGET"
        def _check2(statuscode, target):
            self.failUnlessEqual(statuscode, str(http.FOUND))
            self.failUnlessEqual(target, redir_url)
        d.addCallback(lambda res:
                      self.shouldRedirect2("test_POST_DIRURL_check",
                                           _check2,
                                           self.POST, foo_url,
                                           t="check",
                                           when_done=redir_url))
        d.addCallback(lambda res:
                      self.POST(foo_url, t="check", return_to=redir_url))
        def _check3(res):
            self.failUnless("Healthy :" in res, res)
            self.failUnless("Return to file/directory" in res)
            self.failUnless(redir_url in res)
        d.addCallback(_check3)

        d.addCallback(lambda res:
                      self.POST(foo_url, t="check", output="JSON"))
        def _check_json(res):
            data = simplejson.loads(res)
            self.failUnless("storage-index" in data)
            self.failUnless(data["results"]["healthy"])
        d.addCallback(_check_json)

        return d

    def test_POST_DIRURL_check_and_repair(self):
        foo_url = self.public_url + "/foo/"
        d = self.POST(foo_url, t="check", repair="true")
        def _check(res):
            self.failUnless("Healthy :" in res, res)
        d.addCallback(_check)
        redir_url = "http://allmydata.org/TARGET"
        def _check2(statuscode, target):
            self.failUnlessEqual(statuscode, str(http.FOUND))
            self.failUnlessEqual(target, redir_url)
        d.addCallback(lambda res:
                      self.shouldRedirect2("test_POST_DIRURL_check_and_repair",
                                           _check2,
                                           self.POST, foo_url,
                                           t="check", repair="true",
                                           when_done=redir_url))
        d.addCallback(lambda res:
                      self.POST(foo_url, t="check", return_to=redir_url))
        def _check3(res):
            self.failUnless("Healthy :" in res)
            self.failUnless("Return to file/directory" in res)
            self.failUnless(redir_url in res)
        d.addCallback(_check3)
        return d

    def wait_for_operation(self, ignored, ophandle):
        url = "/operations/" + ophandle
        url += "?t=status&output=JSON"
        d = self.GET(url)
        def _got(res):
            data = simplejson.loads(res)
            if not data["finished"]:
                d = self.stall(delay=1.0)
                d.addCallback(self.wait_for_operation, ophandle)
                return d
            return data
        d.addCallback(_got)
        return d

    def get_operation_results(self, ignored, ophandle, output=None):
        url = "/operations/" + ophandle
        url += "?t=status"
        if output:
            url += "&output=" + output
        d = self.GET(url)
        def _got(res):
            if output and output.lower() == "json":
                return simplejson.loads(res)
            return res
        d.addCallback(_got)
        return d

    def test_POST_DIRURL_deepcheck_no_ophandle(self):
        d = self.shouldFail2(error.Error,
                             "test_POST_DIRURL_deepcheck_no_ophandle",
                             "400 Bad Request",
                             "slow operation requires ophandle=",
                             self.POST, self.public_url, t="start-deep-check")
        return d

    def test_POST_DIRURL_deepcheck(self):
        def _check_redirect(statuscode, target):
            self.failUnlessEqual(statuscode, str(http.FOUND))
            self.failUnless(target.endswith("/operations/123"))
        d = self.shouldRedirect2("test_POST_DIRURL_deepcheck", _check_redirect,
                                 self.POST, self.public_url,
                                 t="start-deep-check", ophandle="123")
        d.addCallback(self.wait_for_operation, "123")
        def _check_json(data):
            self.failUnlessEqual(data["finished"], True)
            self.failUnlessEqual(data["count-objects-checked"], 8)
            self.failUnlessEqual(data["count-objects-healthy"], 8)
        d.addCallback(_check_json)
        d.addCallback(self.get_operation_results, "123", "html")
        def _check_html(res):
            self.failUnless("Objects Checked: <span>8</span>" in res)
            self.failUnless("Objects Healthy: <span>8</span>" in res)
        d.addCallback(_check_html)

        d.addCallback(lambda res:
                      self.GET("/operations/123/"))
        d.addCallback(_check_html) # should be the same as without the slash

        d.addCallback(lambda res:
                      self.shouldFail2(error.Error, "one", "404 Not Found",
                                       "No detailed results for SI bogus",
                                       self.GET, "/operations/123/bogus"))

        foo_si = self._foo_node.get_storage_index()
        foo_si_s = base32.b2a(foo_si)
        d.addCallback(lambda res:
                      self.GET("/operations/123/%s?output=JSON" % foo_si_s))
        def _check_foo_json(res):
            data = simplejson.loads(res)
            self.failUnlessEqual(data["storage-index"], foo_si_s)
            self.failUnless(data["results"]["healthy"])
        d.addCallback(_check_foo_json)
        return d

    def test_POST_DIRURL_deepcheck_and_repair(self):
        d = self.POST(self.public_url, t="start-deep-check", repair="true",
                      ophandle="124", output="json", followRedirect=True)
        d.addCallback(self.wait_for_operation, "124")
        def _check_json(data):
            self.failUnlessEqual(data["finished"], True)
            self.failUnlessEqual(data["count-objects-checked"], 8)
            self.failUnlessEqual(data["count-objects-healthy-pre-repair"], 8)
            self.failUnlessEqual(data["count-objects-unhealthy-pre-repair"], 0)
            self.failUnlessEqual(data["count-corrupt-shares-pre-repair"], 0)
            self.failUnlessEqual(data["count-repairs-attempted"], 0)
            self.failUnlessEqual(data["count-repairs-successful"], 0)
            self.failUnlessEqual(data["count-repairs-unsuccessful"], 0)
            self.failUnlessEqual(data["count-objects-healthy-post-repair"], 8)
            self.failUnlessEqual(data["count-objects-unhealthy-post-repair"], 0)
            self.failUnlessEqual(data["count-corrupt-shares-post-repair"], 0)
        d.addCallback(_check_json)
        d.addCallback(self.get_operation_results, "124", "html")
        def _check_html(res):
            self.failUnless("Objects Checked: <span>8</span>" in res)

            self.failUnless("Objects Healthy (before repair): <span>8</span>" in res)
            self.failUnless("Objects Unhealthy (before repair): <span>0</span>" in res)
            self.failUnless("Corrupt Shares (before repair): <span>0</span>" in res)

            self.failUnless("Repairs Attempted: <span>0</span>" in res)
            self.failUnless("Repairs Successful: <span>0</span>" in res)
            self.failUnless("Repairs Unsuccessful: <span>0</span>" in res)

            self.failUnless("Objects Healthy (after repair): <span>8</span>" in res)
            self.failUnless("Objects Unhealthy (after repair): <span>0</span>" in res)
            self.failUnless("Corrupt Shares (after repair): <span>0</span>" in res)
        d.addCallback(_check_html)
        return d

    def test_POST_FILEURL_bad_t(self):
        d = self.shouldFail2(error.Error, "POST_bad_t", "400 Bad Request",
                             "POST to file: bad t=bogus",
                             self.POST, self.public_url + "/foo/bar.txt",
                             t="bogus")
        return d

    def test_POST_mkdir(self): # return value?
        d = self.POST(self.public_url + "/foo", t="mkdir", name="newdir")
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_mkdir_initial_children(self):
        newkids, filecap1, ign, ign, ign = self._create_initial_children()
        d = self.POST(self.public_url + "/foo", t="mkdir-with-children",
                      name="newdir", children=simplejson.dumps(newkids))
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"newdir"))
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, newkids.keys())
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessChildURIIs, u"child-imm", filecap1)
        return d

    def test_POST_mkdir_2(self):
        d = self.POST(self.public_url + "/foo/newdir?t=mkdir", "")
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"newdir"))
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_mkdirs_2(self):
        d = self.POST(self.public_url + "/foo/bardir/newdir?t=mkdir", "")
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"bardir"))
        d.addCallback(lambda res: self._foo_node.get(u"bardir"))
        d.addCallback(lambda bardirnode: bardirnode.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_mkdir_no_parentdir_noredirect(self):
        d = self.POST("/uri?t=mkdir")
        def _after_mkdir(res):
            uri.DirectoryURI.init_from_string(res)
        d.addCallback(_after_mkdir)
        return d

    def test_POST_mkdir_no_parentdir_redirect(self):
        d = self.POST("/uri?t=mkdir&redirect_to_result=true")
        d.addBoth(self.shouldRedirect, None, statuscode='303')
        def _check_target(target):
            target = urllib.unquote(target)
            self.failUnless(target.startswith("uri/URI:DIR2:"), target)
        d.addCallback(_check_target)
        return d

    def _create_initial_children(self):
        contents, n, filecap1 = self.makefile(12)
        md1 = {"metakey1": "metavalue1"}
        filecap2 = make_mutable_file_uri()
        node3 = self.s.create_node_from_uri(make_mutable_file_uri())
        filecap3 = node3.get_readonly_uri()
        node4 = self.s.create_node_from_uri(make_mutable_file_uri())
        dircap = DirectoryNode(node4, None, None).get_uri()
        newkids = {u"child-imm": ["filenode", {"ro_uri": filecap1,
                                               "metadata": md1, }],
                   u"child-mutable": ["filenode", {"rw_uri": filecap2}],
                   u"child-mutable-ro": ["filenode", {"ro_uri": filecap3}],
                   u"dirchild": ["dirnode", {"rw_uri": dircap}],
                   }
        return newkids, filecap1, filecap2, filecap3, dircap

    def test_POST_mkdir_no_parentdir_initial_children(self):
        (newkids, filecap1, filecap2, filecap3,
         dircap) = self._create_initial_children()
        d = self.POST("/uri?t=mkdir-with-children",
                      children=simplejson.dumps(newkids))
        def _after_mkdir(res):
            self.failUnless(res.startswith("URI:DIR"), res)
            n = self.s.create_node_from_uri(res)
            d2 = self.failUnlessNodeKeysAre(n, newkids.keys())
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"child-imm", filecap1))
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"child-mutable",
                                                     filecap2))
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"child-mutable-ro",
                                                     filecap3))
            d2.addCallback(lambda ign:
                           self.failUnlessChildURIIs(n, u"dirchild", dircap))
            return d2
        d.addCallback(_after_mkdir)
        return d

    def test_POST_mkdir_no_parentdir_unexpected_children(self):
        # the regular /uri?t=mkdir operation is specified to ignore its body.
        # Only t=mkdir-with-children pays attention to it.
        (newkids, filecap1, filecap2, filecap3,
         dircap) = self._create_initial_children()
        d = self.shouldHTTPError("POST t=mkdir unexpected children",
                                 400, "Bad Request",
                                 "t=mkdir does not accept children=, "
                                 "try t=mkdir-with-children instead",
                                 self.POST, "/uri?t=mkdir", # without children
                                 children=simplejson.dumps(newkids))
        return d

    def test_POST_noparent_bad(self):
        d = self.shouldHTTPError("POST /uri?t=bogus", 400, "Bad Request",
                                 "/uri accepts only PUT, PUT?t=mkdir, "
                                 "POST?t=upload, and POST?t=mkdir",
                                 self.POST, "/uri?t=bogus")
        return d

    def test_welcome_page_mkdir_button(self):
        # Fetch the welcome page.
        d = self.GET("/")
        def _after_get_welcome_page(res):
            MKDIR_BUTTON_RE=re.compile('<form action="([^"]*)" method="post".*?<input type="hidden" name="t" value="([^"]*)" /><input type="hidden" name="([^"]*)" value="([^"]*)" /><input type="submit" value="Create a directory" />', re.I)
            mo = MKDIR_BUTTON_RE.search(res)
            formaction = mo.group(1)
            formt = mo.group(2)
            formaname = mo.group(3)
            formavalue = mo.group(4)
            return (formaction, formt, formaname, formavalue)
        d.addCallback(_after_get_welcome_page)
        def _after_parse_form(res):
            (formaction, formt, formaname, formavalue) = res
            return self.POST("/%s?t=%s&%s=%s" % (formaction, formt, formaname, formavalue))
        d.addCallback(_after_parse_form)
        d.addBoth(self.shouldRedirect, None, statuscode='303')
        return d

    def test_POST_mkdir_replace(self): # return value?
        d = self.POST(self.public_url + "/foo", t="mkdir", name="sub")
        d.addCallback(lambda res: self._foo_node.get(u"sub"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_mkdir_no_replace_queryarg(self): # return value?
        d = self.POST(self.public_url + "/foo?replace=false", t="mkdir", name="sub")
        d.addBoth(self.shouldFail, error.Error,
                  "POST_mkdir_no_replace_queryarg",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self._foo_node.get(u"sub"))
        d.addCallback(self.failUnlessNodeKeysAre, [u"baz.txt"])
        return d

    def test_POST_mkdir_no_replace_field(self): # return value?
        d = self.POST(self.public_url + "/foo", t="mkdir", name="sub",
                      replace="false")
        d.addBoth(self.shouldFail, error.Error, "POST_mkdir_no_replace_field",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self._foo_node.get(u"sub"))
        d.addCallback(self.failUnlessNodeKeysAre, [u"baz.txt"])
        return d

    def test_POST_mkdir_whendone_field(self):
        d = self.POST(self.public_url + "/foo",
                      t="mkdir", name="newdir", when_done="/THERE")
        d.addBoth(self.shouldRedirect, "/THERE")
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_mkdir_whendone_queryarg(self):
        d = self.POST(self.public_url + "/foo?when_done=/THERE",
                      t="mkdir", name="newdir")
        d.addBoth(self.shouldRedirect, "/THERE")
        d.addCallback(lambda res: self._foo_node.get(u"newdir"))
        d.addCallback(self.failUnlessNodeKeysAre, [])
        return d

    def test_POST_bad_t(self):
        d = self.shouldFail2(error.Error, "POST_bad_t", "400 Bad Request",
                             "POST to a directory with bad t=BOGUS",
                             self.POST, self.public_url + "/foo", t="BOGUS")
        return d

    def test_POST_set_children(self):
        contents9, n9, newuri9 = self.makefile(9)
        contents10, n10, newuri10 = self.makefile(10)
        contents11, n11, newuri11 = self.makefile(11)

        reqbody = """{
                     "atomic_added_1": [ "filenode", { "rw_uri": "%s",
                                                "size": 0,
                                                "metadata": {
                                                  "ctime": 1002777696.7564139,
                                                  "mtime": 1002777696.7564139
                                                 }
                                               } ],
                     "atomic_added_2": [ "filenode", { "rw_uri": "%s",
                                                "size": 1,
                                                "metadata": {
                                                  "ctime": 1002777696.7564139,
                                                  "mtime": 1002777696.7564139
                                                 }
                                               } ],
                     "atomic_added_3": [ "filenode", { "rw_uri": "%s",
                                                "size": 2,
                                                "metadata": {
                                                  "ctime": 1002777696.7564139,
                                                  "mtime": 1002777696.7564139
                                                 }
                                               } ]
                    }""" % (newuri9, newuri10, newuri11)

        url = self.webish_url + self.public_url + "/foo" + "?t=set_children"

        d = client.getPage(url, method="POST", postdata=reqbody)
        def _then(res):
            self.failUnlessURIMatchesChild(newuri9, self._foo_node, u"atomic_added_1")
            self.failUnlessURIMatchesChild(newuri10, self._foo_node, u"atomic_added_2")
            self.failUnlessURIMatchesChild(newuri11, self._foo_node, u"atomic_added_3")

        d.addCallback(_then)
        d.addErrback(self.dump_error)
        return d

    def test_POST_put_uri(self):
        contents, n, newuri = self.makefile(8)
        d = self.POST(self.public_url + "/foo", t="uri", name="new.txt", uri=newuri)
        d.addCallback(self.failUnlessURIMatchesChild, self._foo_node, u"new.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"new.txt",
                                                      contents))
        return d

    def test_POST_put_uri_replace(self):
        contents, n, newuri = self.makefile(8)
        d = self.POST(self.public_url + "/foo", t="uri", name="bar.txt", uri=newuri)
        d.addCallback(self.failUnlessURIMatchesChild, self._foo_node, u"bar.txt")
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"bar.txt",
                                                      contents))
        return d

    def test_POST_put_uri_no_replace_queryarg(self):
        contents, n, newuri = self.makefile(8)
        d = self.POST(self.public_url + "/foo?replace=false", t="uri",
                      name="bar.txt", uri=newuri)
        d.addBoth(self.shouldFail, error.Error,
                  "POST_put_uri_no_replace_queryarg",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/bar.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_POST_put_uri_no_replace_field(self):
        contents, n, newuri = self.makefile(8)
        d = self.POST(self.public_url + "/foo", t="uri", replace="false",
                      name="bar.txt", uri=newuri)
        d.addBoth(self.shouldFail, error.Error,
                  "POST_put_uri_no_replace_field",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/bar.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_POST_delete(self):
        d = self.POST(self.public_url + "/foo", t="delete", name="bar.txt")
        d.addCallback(lambda res: self._foo_node.list())
        def _check(children):
            self.failIf(u"bar.txt" in children)
        d.addCallback(_check)
        return d

    def test_POST_rename_file(self):
        d = self.POST(self.public_url + "/foo", t="rename",
                      from_name="bar.txt", to_name='wibble.txt')
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self._foo_node, u"bar.txt"))
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"wibble.txt"))
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/wibble.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/wibble.txt?t=json"))
        d.addCallback(self.failUnlessIsBarJSON)
        return d

    def test_POST_rename_file_redundant(self):
        d = self.POST(self.public_url + "/foo", t="rename",
                      from_name="bar.txt", to_name='bar.txt')
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"bar.txt"))
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/bar.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/bar.txt?t=json"))
        d.addCallback(self.failUnlessIsBarJSON)
        return d

    def test_POST_rename_file_replace(self):
        # rename a file and replace a directory with it
        d = self.POST(self.public_url + "/foo", t="rename",
                      from_name="bar.txt", to_name='empty')
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self._foo_node, u"bar.txt"))
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"empty"))
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/empty"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/empty?t=json"))
        d.addCallback(self.failUnlessIsBarJSON)
        return d

    def test_POST_rename_file_no_replace_queryarg(self):
        # rename a file and replace a directory with it
        d = self.POST(self.public_url + "/foo?replace=false", t="rename",
                      from_name="bar.txt", to_name='empty')
        d.addBoth(self.shouldFail, error.Error,
                  "POST_rename_file_no_replace_queryarg",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/empty?t=json"))
        d.addCallback(self.failUnlessIsEmptyJSON)
        return d

    def test_POST_rename_file_no_replace_field(self):
        # rename a file and replace a directory with it
        d = self.POST(self.public_url + "/foo", t="rename", replace="false",
                      from_name="bar.txt", to_name='empty')
        d.addBoth(self.shouldFail, error.Error,
                  "POST_rename_file_no_replace_field",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        d.addCallback(lambda res: self.GET(self.public_url + "/foo/empty?t=json"))
        d.addCallback(self.failUnlessIsEmptyJSON)
        return d

    def failUnlessIsEmptyJSON(self, res):
        data = simplejson.loads(res)
        self.failUnlessEqual(data[0], "dirnode", data)
        self.failUnlessEqual(len(data[1]["children"]), 0)

    def test_POST_rename_file_slash_fail(self):
        d = self.POST(self.public_url + "/foo", t="rename",
                      from_name="bar.txt", to_name='kirk/spock.txt')
        d.addBoth(self.shouldFail, error.Error,
                  "test_POST_rename_file_slash_fail",
                  "400 Bad Request",
                  "to_name= may not contain a slash",
                  )
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self._foo_node, u"bar.txt"))
        return d

    def test_POST_rename_dir(self):
        d = self.POST(self.public_url, t="rename",
                      from_name="foo", to_name='plunk')
        d.addCallback(lambda res:
                      self.failIfNodeHasChild(self.public_root, u"foo"))
        d.addCallback(lambda res:
                      self.failUnlessNodeHasChild(self.public_root, u"plunk"))
        d.addCallback(lambda res: self.GET(self.public_url + "/plunk?t=json"))
        d.addCallback(self.failUnlessIsFooJSON)
        return d

    def shouldRedirect(self, res, target=None, statuscode=None, which=""):
        """ If target is not None then the redirection has to go to target.  If
        statuscode is not None then the redirection has to be accomplished with
        that HTTP status code."""
        if not isinstance(res, failure.Failure):
            to_where = (target is None) and "somewhere" or ("to " + target)
            self.fail("%s: we were expecting to get redirected %s, not get an"
                      " actual page: %s" % (which, to_where, res))
        res.trap(error.PageRedirect)
        if statuscode is not None:
            self.failUnlessEqual(res.value.status, statuscode,
                                 "%s: not a redirect" % which)
        if target is not None:
            # the PageRedirect does not seem to capture the uri= query arg
            # properly, so we can't check for it.
            realtarget = self.webish_url + target
            self.failUnlessEqual(res.value.location, realtarget,
                                 "%s: wrong target" % which)
        return res.value.location

    def test_GET_URI_form(self):
        base = "/uri?uri=%s" % self._bar_txt_uri
        # this is supposed to give us a redirect to /uri/$URI, plus arguments
        targetbase = "/uri/%s" % urllib.quote(self._bar_txt_uri)
        d = self.GET(base)
        d.addBoth(self.shouldRedirect, targetbase)
        d.addCallback(lambda res: self.GET(base+"&filename=bar.txt"))
        d.addBoth(self.shouldRedirect, targetbase+"?filename=bar.txt")
        d.addCallback(lambda res: self.GET(base+"&t=json"))
        d.addBoth(self.shouldRedirect, targetbase+"?t=json")
        d.addCallback(self.log, "about to get file by uri")
        d.addCallback(lambda res: self.GET(base, followRedirect=True))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(self.log, "got file by uri, about to get dir by uri")
        d.addCallback(lambda res: self.GET("/uri?uri=%s&t=json" % self._foo_uri,
                                           followRedirect=True))
        d.addCallback(self.failUnlessIsFooJSON)
        d.addCallback(self.log, "got dir by uri")

        return d

    def test_GET_URI_form_bad(self):
        d = self.shouldFail2(error.Error, "test_GET_URI_form_bad",
                             "400 Bad Request", "GET /uri requires uri=",
                             self.GET, "/uri")
        return d

    def test_GET_rename_form(self):
        d = self.GET(self.public_url + "/foo?t=rename-form&name=bar.txt",
                     followRedirect=True)
        def _check(res):
            self.failUnless('name="when_done" value="."' in res, res)
            self.failUnless(re.search(r'name="from_name" value="bar\.txt"', res))
        d.addCallback(_check)
        return d

    def log(self, res, msg):
        #print "MSG: %s  RES: %s" % (msg, res)
        log.msg(msg)
        return res

    def test_GET_URI_URL(self):
        base = "/uri/%s" % self._bar_txt_uri
        d = self.GET(base)
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(base+"?filename=bar.txt"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        d.addCallback(lambda res: self.GET(base+"?filename=bar.txt&save=true"))
        d.addCallback(self.failUnlessIsBarDotTxt)
        return d

    def test_GET_URI_URL_dir(self):
        base = "/uri/%s?t=json" % self._foo_uri
        d = self.GET(base)
        d.addCallback(self.failUnlessIsFooJSON)
        return d

    def test_GET_URI_URL_missing(self):
        base = "/uri/%s" % self._bad_file_uri
        d = self.shouldHTTPError("test_GET_URI_URL_missing",
                                 http.GONE, None, "NotEnoughSharesError",
                                 self.GET, base)
        # TODO: how can we exercise both sides of WebDownloadTarget.fail
        # here? we must arrange for a download to fail after target.open()
        # has been called, and then inspect the response to see that it is
        # shorter than we expected.
        return d

    def test_PUT_DIRURL_uri(self):
        d = self.s.create_dirnode()
        def _made_dir(dn):
            new_uri = dn.get_uri()
            # replace /foo with a new (empty) directory
            d = self.PUT(self.public_url + "/foo?t=uri", new_uri)
            d.addCallback(lambda res:
                          self.failUnlessEqual(res.strip(), new_uri))
            d.addCallback(lambda res:
                          self.failUnlessChildURIIs(self.public_root,
                                                    u"foo",
                                                    new_uri))
            return d
        d.addCallback(_made_dir)
        return d

    def test_PUT_DIRURL_uri_noreplace(self):
        d = self.s.create_dirnode()
        def _made_dir(dn):
            new_uri = dn.get_uri()
            # replace /foo with a new (empty) directory, but ask that
            # replace=false, so it should fail
            d = self.shouldFail2(error.Error, "test_PUT_DIRURL_uri_noreplace",
                                 "409 Conflict", "There was already a child by that name, and you asked me to not replace it",
                                 self.PUT,
                                 self.public_url + "/foo?t=uri&replace=false",
                                 new_uri)
            d.addCallback(lambda res:
                          self.failUnlessChildURIIs(self.public_root,
                                                    u"foo",
                                                    self._foo_uri))
            return d
        d.addCallback(_made_dir)
        return d

    def test_PUT_DIRURL_bad_t(self):
        d = self.shouldFail2(error.Error, "test_PUT_DIRURL_bad_t",
                                 "400 Bad Request", "PUT to a directory",
                                 self.PUT, self.public_url + "/foo?t=BOGUS", "")
        d.addCallback(lambda res:
                      self.failUnlessChildURIIs(self.public_root,
                                                u"foo",
                                                self._foo_uri))
        return d

    def test_PUT_NEWFILEURL_uri(self):
        contents, n, new_uri = self.makefile(8)
        d = self.PUT(self.public_url + "/foo/new.txt?t=uri", new_uri)
        d.addCallback(lambda res: self.failUnlessEqual(res.strip(), new_uri))
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"new.txt",
                                                      contents))
        return d

    def test_PUT_NEWFILEURL_uri_replace(self):
        contents, n, new_uri = self.makefile(8)
        d = self.PUT(self.public_url + "/foo/bar.txt?t=uri", new_uri)
        d.addCallback(lambda res: self.failUnlessEqual(res.strip(), new_uri))
        d.addCallback(lambda res:
                      self.failUnlessChildContentsAre(self._foo_node, u"bar.txt",
                                                      contents))
        return d

    def test_PUT_NEWFILEURL_uri_no_replace(self):
        contents, n, new_uri = self.makefile(8)
        d = self.PUT(self.public_url + "/foo/bar.txt?t=uri&replace=false", new_uri)
        d.addBoth(self.shouldFail, error.Error, "PUT_NEWFILEURL_uri_no_replace",
                  "409 Conflict",
                  "There was already a child by that name, and you asked me "
                  "to not replace it")
        return d

    def test_PUT_NEWFILE_URI(self):
        file_contents = "New file contents here\n"
        d = self.PUT("/uri", file_contents)
        def _check(uri):
            assert isinstance(uri, str), uri
            self.failUnless(uri in FakeCHKFileNode.all_contents)
            self.failUnlessEqual(FakeCHKFileNode.all_contents[uri],
                                 file_contents)
            return self.GET("/uri/%s" % uri)
        d.addCallback(_check)
        def _check2(res):
            self.failUnlessEqual(res, file_contents)
        d.addCallback(_check2)
        return d

    def test_PUT_NEWFILE_URI_not_mutable(self):
        file_contents = "New file contents here\n"
        d = self.PUT("/uri?mutable=false", file_contents)
        def _check(uri):
            assert isinstance(uri, str), uri
            self.failUnless(uri in FakeCHKFileNode.all_contents)
            self.failUnlessEqual(FakeCHKFileNode.all_contents[uri],
                                 file_contents)
            return self.GET("/uri/%s" % uri)
        d.addCallback(_check)
        def _check2(res):
            self.failUnlessEqual(res, file_contents)
        d.addCallback(_check2)
        return d

    def test_PUT_NEWFILE_URI_only_PUT(self):
        d = self.PUT("/uri?t=bogus", "")
        d.addBoth(self.shouldFail, error.Error,
                  "PUT_NEWFILE_URI_only_PUT",
                  "400 Bad Request",
                  "/uri accepts only PUT, PUT?t=mkdir, POST?t=upload, and POST?t=mkdir")
        return d

    def test_PUT_NEWFILE_URI_mutable(self):
        file_contents = "New file contents here\n"
        d = self.PUT("/uri?mutable=true", file_contents)
        def _check1(filecap):
            filecap = filecap.strip()
            self.failUnless(filecap.startswith("URI:SSK:"), filecap)
            self.filecap = filecap
            u = uri.WriteableSSKFileURI.init_from_string(filecap)
            self.failUnless(u.storage_index in FakeMutableFileNode.all_contents)
            n = self.s.create_node_from_uri(filecap)
            return n.download_best_version()
        d.addCallback(_check1)
        def _check2(data):
            self.failUnlessEqual(data, file_contents)
            return self.GET("/uri/%s" % urllib.quote(self.filecap))
        d.addCallback(_check2)
        def _check3(res):
            self.failUnlessEqual(res, file_contents)
        d.addCallback(_check3)
        return d

    def test_PUT_mkdir(self):
        d = self.PUT("/uri?t=mkdir", "")
        def _check(uri):
            n = self.s.create_node_from_uri(uri.strip())
            d2 = self.failUnlessNodeKeysAre(n, [])
            d2.addCallback(lambda res:
                           self.GET("/uri/%s?t=json" % uri))
            return d2
        d.addCallback(_check)
        d.addCallback(self.failUnlessIsEmptyJSON)
        return d

    def test_POST_check(self):
        d = self.POST(self.public_url + "/foo", t="check", name="bar.txt")
        def _done(res):
            # this returns a string form of the results, which are probably
            # None since we're using fake filenodes.
            # TODO: verify that the check actually happened, by changing
            # FakeCHKFileNode to count how many times .check() has been
            # called.
            pass
        d.addCallback(_done)
        return d

    def test_bad_method(self):
        url = self.webish_url + self.public_url + "/foo/bar.txt"
        d = self.shouldHTTPError("test_bad_method",
                                 501, "Not Implemented",
                                 "I don't know how to treat a BOGUS request.",
                                 client.getPage, url, method="BOGUS")
        return d

    def test_short_url(self):
        url = self.webish_url + "/uri"
        d = self.shouldHTTPError("test_short_url", 501, "Not Implemented",
                                 "I don't know how to treat a DELETE request.",
                                 client.getPage, url, method="DELETE")
        return d

    def test_ophandle_bad(self):
        url = self.webish_url + "/operations/bogus?t=status"
        d = self.shouldHTTPError("test_ophandle_bad", 404, "404 Not Found",
                                 "unknown/expired handle 'bogus'",
                                 client.getPage, url)
        return d

    def test_ophandle_cancel(self):
        d = self.POST(self.public_url + "/foo/?t=start-manifest&ophandle=128",
                      followRedirect=True)
        d.addCallback(lambda ignored:
                      self.GET("/operations/128?t=status&output=JSON"))
        def _check1(res):
            data = simplejson.loads(res)
            self.failUnless("finished" in data, res)
            monitor = self.ws.root.child_operations.handles["128"][0]
            d = self.POST("/operations/128?t=cancel&output=JSON")
            def _check2(res):
                data = simplejson.loads(res)
                self.failUnless("finished" in data, res)
                # t=cancel causes the handle to be forgotten
                self.failUnless(monitor.is_cancelled())
            d.addCallback(_check2)
            return d
        d.addCallback(_check1)
        d.addCallback(lambda ignored:
                      self.shouldHTTPError("test_ophandle_cancel",
                                           404, "404 Not Found",
                                           "unknown/expired handle '128'",
                                           self.GET,
                                           "/operations/128?t=status&output=JSON"))
        return d

    def test_ophandle_retainfor(self):
        d = self.POST(self.public_url + "/foo/?t=start-manifest&ophandle=129&retain-for=60",
                      followRedirect=True)
        d.addCallback(lambda ignored:
                      self.GET("/operations/129?t=status&output=JSON&retain-for=0"))
        def _check1(res):
            data = simplejson.loads(res)
            self.failUnless("finished" in data, res)
        d.addCallback(_check1)
        # the retain-for=0 will cause the handle to be expired very soon
        d.addCallback(self.stall, 2.0)
        d.addCallback(lambda ignored:
                      self.shouldHTTPError("test_ophandle_retainfor",
                                           404, "404 Not Found",
                                           "unknown/expired handle '129'",
                                           self.GET,
                                           "/operations/129?t=status&output=JSON"))
        return d

    def test_ophandle_release_after_complete(self):
        d = self.POST(self.public_url + "/foo/?t=start-manifest&ophandle=130",
                      followRedirect=True)
        d.addCallback(self.wait_for_operation, "130")
        d.addCallback(lambda ignored:
                      self.GET("/operations/130?t=status&output=JSON&release-after-complete=true"))
        # the release-after-complete=true will cause the handle to be expired
        d.addCallback(lambda ignored:
                      self.shouldHTTPError("test_ophandle_release_after_complete",
                                           404, "404 Not Found",
                                           "unknown/expired handle '130'",
                                           self.GET,
                                           "/operations/130?t=status&output=JSON"))
        return d

    def test_incident(self):
        d = self.POST("/report_incident", details="eek")
        def _done(res):
            self.failUnless("Thank you for your report!" in res, res)
        d.addCallback(_done)
        return d

    def test_static(self):
        webdir = os.path.join(self.staticdir, "subdir")
        fileutil.make_dirs(webdir)
        f = open(os.path.join(webdir, "hello.txt"), "wb")
        f.write("hello")
        f.close()

        d = self.GET("/static/subdir/hello.txt")
        def _check(res):
            self.failUnlessEqual(res, "hello")
        d.addCallback(_check)
        return d


class Util(unittest.TestCase, ShouldFailMixin):
    def test_parse_replace_arg(self):
        self.failUnlessEqual(common.parse_replace_arg("true"), True)
        self.failUnlessEqual(common.parse_replace_arg("false"), False)
        self.failUnlessEqual(common.parse_replace_arg("only-files"),
                             "only-files")
        self.shouldFail(AssertionError, "test_parse_replace_arg", "",
                        common.parse_replace_arg, "only_fles")

    def test_abbreviate_time(self):
        self.failUnlessEqual(common.abbreviate_time(None), "")
        self.failUnlessEqual(common.abbreviate_time(1.234), "1.23s")
        self.failUnlessEqual(common.abbreviate_time(0.123), "123ms")
        self.failUnlessEqual(common.abbreviate_time(0.00123), "1.2ms")
        self.failUnlessEqual(common.abbreviate_time(0.000123), "123us")

    def test_abbreviate_rate(self):
        self.failUnlessEqual(common.abbreviate_rate(None), "")
        self.failUnlessEqual(common.abbreviate_rate(1234000), "1.23MBps")
        self.failUnlessEqual(common.abbreviate_rate(12340), "12.3kBps")
        self.failUnlessEqual(common.abbreviate_rate(123), "123Bps")

    def test_abbreviate_size(self):
        self.failUnlessEqual(common.abbreviate_size(None), "")
        self.failUnlessEqual(common.abbreviate_size(1.23*1000*1000*1000), "1.23GB")
        self.failUnlessEqual(common.abbreviate_size(1.23*1000*1000), "1.23MB")
        self.failUnlessEqual(common.abbreviate_size(1230), "1.2kB")
        self.failUnlessEqual(common.abbreviate_size(123), "123B")

    def test_plural(self):
        def convert(s):
            return "%d second%s" % (s, status.plural(s))
        self.failUnlessEqual(convert(0), "0 seconds")
        self.failUnlessEqual(convert(1), "1 second")
        self.failUnlessEqual(convert(2), "2 seconds")
        def convert2(s):
            return "has share%s: %s" % (status.plural(s), ",".join(s))
        self.failUnlessEqual(convert2([]), "has shares: ")
        self.failUnlessEqual(convert2(["1"]), "has share: 1")
        self.failUnlessEqual(convert2(["1","2"]), "has shares: 1,2")


class Grid(GridTestMixin, WebErrorMixin, unittest.TestCase, ShouldFailMixin):

    def CHECK(self, ign, which, args, clientnum=0):
        fileurl = self.fileurls[which]
        url = fileurl + "?" + args
        return self.GET(url, method="POST", clientnum=clientnum)

    def test_filecheck(self):
        self.basedir = "web/Grid/filecheck"
        self.set_up_grid()
        c0 = self.g.clients[0]
        self.uris = {}
        DATA = "data" * 100
        d = c0.upload(upload.Data(DATA, convergence=""))
        def _stash_uri(ur, which):
            self.uris[which] = ur.uri
        d.addCallback(_stash_uri, "good")
        d.addCallback(lambda ign:
                      c0.upload(upload.Data(DATA+"1", convergence="")))
        d.addCallback(_stash_uri, "sick")
        d.addCallback(lambda ign:
                      c0.upload(upload.Data(DATA+"2", convergence="")))
        d.addCallback(_stash_uri, "dead")
        def _stash_mutable_uri(n, which):
            self.uris[which] = n.get_uri()
            assert isinstance(self.uris[which], str)
        d.addCallback(lambda ign: c0.create_mutable_file(DATA+"3"))
        d.addCallback(_stash_mutable_uri, "corrupt")
        d.addCallback(lambda ign:
                      c0.upload(upload.Data("literal", convergence="")))
        d.addCallback(_stash_uri, "small")

        def _compute_fileurls(ignored):
            self.fileurls = {}
            for which in self.uris:
                self.fileurls[which] = "uri/" + urllib.quote(self.uris[which])
        d.addCallback(_compute_fileurls)

        def _clobber_shares(ignored):
            good_shares = self.find_shares(self.uris["good"])
            self.failUnlessEqual(len(good_shares), 10)
            sick_shares = self.find_shares(self.uris["sick"])
            os.unlink(sick_shares[0][2])
            dead_shares = self.find_shares(self.uris["dead"])
            for i in range(1, 10):
                os.unlink(dead_shares[i][2])
            c_shares = self.find_shares(self.uris["corrupt"])
            cso = CorruptShareOptions()
            cso.stdout = StringIO()
            cso.parseOptions([c_shares[0][2]])
            corrupt_share(cso)
        d.addCallback(_clobber_shares)

        d.addCallback(self.CHECK, "good", "t=check")
        def _got_html_good(res):
            self.failUnless("Healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
        d.addCallback(_got_html_good)
        d.addCallback(self.CHECK, "good", "t=check&return_to=somewhere")
        def _got_html_good_return_to(res):
            self.failUnless("Healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
            self.failUnless('<a href="somewhere">Return to file'
                            in res, res)
        d.addCallback(_got_html_good_return_to)
        d.addCallback(self.CHECK, "good", "t=check&output=json")
        def _got_json_good(res):
            r = simplejson.loads(res)
            self.failUnlessEqual(r["summary"], "Healthy")
            self.failUnless(r["results"]["healthy"])
            self.failIf(r["results"]["needs-rebalancing"])
            self.failUnless(r["results"]["recoverable"])
        d.addCallback(_got_json_good)

        d.addCallback(self.CHECK, "small", "t=check")
        def _got_html_small(res):
            self.failUnless("Literal files are always healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
        d.addCallback(_got_html_small)
        d.addCallback(self.CHECK, "small", "t=check&return_to=somewhere")
        def _got_html_small_return_to(res):
            self.failUnless("Literal files are always healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
            self.failUnless('<a href="somewhere">Return to file'
                            in res, res)
        d.addCallback(_got_html_small_return_to)
        d.addCallback(self.CHECK, "small", "t=check&output=json")
        def _got_json_small(res):
            r = simplejson.loads(res)
            self.failUnlessEqual(r["storage-index"], "")
            self.failUnless(r["results"]["healthy"])
        d.addCallback(_got_json_small)

        d.addCallback(self.CHECK, "sick", "t=check")
        def _got_html_sick(res):
            self.failUnless("Not Healthy" in res, res)
        d.addCallback(_got_html_sick)
        d.addCallback(self.CHECK, "sick", "t=check&output=json")
        def _got_json_sick(res):
            r = simplejson.loads(res)
            self.failUnlessEqual(r["summary"],
                                 "Not Healthy: 9 shares (enc 3-of-10)")
            self.failIf(r["results"]["healthy"])
            self.failIf(r["results"]["needs-rebalancing"])
            self.failUnless(r["results"]["recoverable"])
        d.addCallback(_got_json_sick)

        d.addCallback(self.CHECK, "dead", "t=check")
        def _got_html_dead(res):
            self.failUnless("Not Healthy" in res, res)
        d.addCallback(_got_html_dead)
        d.addCallback(self.CHECK, "dead", "t=check&output=json")
        def _got_json_dead(res):
            r = simplejson.loads(res)
            self.failUnlessEqual(r["summary"],
                                 "Not Healthy: 1 shares (enc 3-of-10)")
            self.failIf(r["results"]["healthy"])
            self.failIf(r["results"]["needs-rebalancing"])
            self.failIf(r["results"]["recoverable"])
        d.addCallback(_got_json_dead)

        d.addCallback(self.CHECK, "corrupt", "t=check&verify=true")
        def _got_html_corrupt(res):
            self.failUnless("Not Healthy! : Unhealthy" in res, res)
        d.addCallback(_got_html_corrupt)
        d.addCallback(self.CHECK, "corrupt", "t=check&verify=true&output=json")
        def _got_json_corrupt(res):
            r = simplejson.loads(res)
            self.failUnless("Unhealthy: 9 shares (enc 3-of-10)" in r["summary"],
                            r["summary"])
            self.failIf(r["results"]["healthy"])
            self.failUnless(r["results"]["recoverable"])
            self.failUnlessEqual(r["results"]["count-shares-good"], 9)
            self.failUnlessEqual(r["results"]["count-corrupt-shares"], 1)
        d.addCallback(_got_json_corrupt)

        d.addErrback(self.explain_web_error)
        return d

    def test_repair_html(self):
        self.basedir = "web/Grid/repair_html"
        self.set_up_grid()
        c0 = self.g.clients[0]
        self.uris = {}
        DATA = "data" * 100
        d = c0.upload(upload.Data(DATA, convergence=""))
        def _stash_uri(ur, which):
            self.uris[which] = ur.uri
        d.addCallback(_stash_uri, "good")
        d.addCallback(lambda ign:
                      c0.upload(upload.Data(DATA+"1", convergence="")))
        d.addCallback(_stash_uri, "sick")
        d.addCallback(lambda ign:
                      c0.upload(upload.Data(DATA+"2", convergence="")))
        d.addCallback(_stash_uri, "dead")
        def _stash_mutable_uri(n, which):
            self.uris[which] = n.get_uri()
            assert isinstance(self.uris[which], str)
        d.addCallback(lambda ign: c0.create_mutable_file(DATA+"3"))
        d.addCallback(_stash_mutable_uri, "corrupt")

        def _compute_fileurls(ignored):
            self.fileurls = {}
            for which in self.uris:
                self.fileurls[which] = "uri/" + urllib.quote(self.uris[which])
        d.addCallback(_compute_fileurls)

        def _clobber_shares(ignored):
            good_shares = self.find_shares(self.uris["good"])
            self.failUnlessEqual(len(good_shares), 10)
            sick_shares = self.find_shares(self.uris["sick"])
            os.unlink(sick_shares[0][2])
            dead_shares = self.find_shares(self.uris["dead"])
            for i in range(1, 10):
                os.unlink(dead_shares[i][2])
            c_shares = self.find_shares(self.uris["corrupt"])
            cso = CorruptShareOptions()
            cso.stdout = StringIO()
            cso.parseOptions([c_shares[0][2]])
            corrupt_share(cso)
        d.addCallback(_clobber_shares)

        d.addCallback(self.CHECK, "good", "t=check&repair=true")
        def _got_html_good(res):
            self.failUnless("Healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
            self.failUnless("No repair necessary" in res, res)
        d.addCallback(_got_html_good)

        d.addCallback(self.CHECK, "sick", "t=check&repair=true")
        def _got_html_sick(res):
            self.failUnless("Healthy : healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
            self.failUnless("Repair successful" in res, res)
        d.addCallback(_got_html_sick)

        # repair of a dead file will fail, of course, but it isn't yet
        # clear how this should be reported. Right now it shows up as
        # a "410 Gone".
        #
        #d.addCallback(self.CHECK, "dead", "t=check&repair=true")
        #def _got_html_dead(res):
        #    print res
        #    self.failUnless("Healthy : healthy" in res, res)
        #    self.failIf("Not Healthy" in res, res)
        #    self.failUnless("No repair necessary" in res, res)
        #d.addCallback(_got_html_dead)

        d.addCallback(self.CHECK, "corrupt", "t=check&verify=true&repair=true")
        def _got_html_corrupt(res):
            self.failUnless("Healthy : Healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
            self.failUnless("Repair successful" in res, res)
        d.addCallback(_got_html_corrupt)

        d.addErrback(self.explain_web_error)
        return d

    def test_repair_json(self):
        self.basedir = "web/Grid/repair_json"
        self.set_up_grid()
        c0 = self.g.clients[0]
        self.uris = {}
        DATA = "data" * 100
        d = c0.upload(upload.Data(DATA+"1", convergence=""))
        def _stash_uri(ur, which):
            self.uris[which] = ur.uri
        d.addCallback(_stash_uri, "sick")

        def _compute_fileurls(ignored):
            self.fileurls = {}
            for which in self.uris:
                self.fileurls[which] = "uri/" + urllib.quote(self.uris[which])
        d.addCallback(_compute_fileurls)

        def _clobber_shares(ignored):
            sick_shares = self.find_shares(self.uris["sick"])
            os.unlink(sick_shares[0][2])
        d.addCallback(_clobber_shares)

        d.addCallback(self.CHECK, "sick", "t=check&repair=true&output=json")
        def _got_json_sick(res):
            r = simplejson.loads(res)
            self.failUnlessEqual(r["repair-attempted"], True)
            self.failUnlessEqual(r["repair-successful"], True)
            self.failUnlessEqual(r["pre-repair-results"]["summary"],
                                 "Not Healthy: 9 shares (enc 3-of-10)")
            self.failIf(r["pre-repair-results"]["results"]["healthy"])
            self.failUnlessEqual(r["post-repair-results"]["summary"], "healthy")
            self.failUnless(r["post-repair-results"]["results"]["healthy"])
        d.addCallback(_got_json_sick)

        d.addErrback(self.explain_web_error)
        return d

    def test_unknown(self):
        self.basedir = "web/Grid/unknown"
        self.set_up_grid()
        c0 = self.g.clients[0]
        self.uris = {}
        self.fileurls = {}

        future_writecap = "x-tahoe-crazy://I_am_from_the_future."
        future_readcap = "x-tahoe-crazy-readonly://I_am_from_the_future."
        # the future cap format may contain slashes, which must be tolerated
        expected_info_url = "uri/%s?t=info" % urllib.quote(future_writecap,
                                                           safe="")
        future_node = UnknownNode(future_writecap, future_readcap)

        d = c0.create_dirnode()
        def _stash_root_and_create_file(n):
            self.rootnode = n
            self.rooturl = "uri/" + urllib.quote(n.get_uri()) + "/"
            self.rourl = "uri/" + urllib.quote(n.get_readonly_uri()) + "/"
            return self.rootnode.set_node(u"future", future_node)
        d.addCallback(_stash_root_and_create_file)
        # make sure directory listing tolerates unknown nodes
        d.addCallback(lambda ign: self.GET(self.rooturl))
        def _check_html(res):
            self.failUnlessIn("<td>future</td>", res)
            # find the More Info link for "future", should be relative
            mo = re.search(r'<a href="([^"]+)">More Info</a>', res)
            info_url = mo.group(1)
            self.failUnlessEqual(info_url, "future?t=info")

        d.addCallback(_check_html)
        d.addCallback(lambda ign: self.GET(self.rooturl+"?t=json"))
        def _check_json(res, expect_writecap):
            data = simplejson.loads(res)
            self.failUnlessEqual(data[0], "dirnode")
            f = data[1]["children"]["future"]
            self.failUnlessEqual(f[0], "unknown")
            if expect_writecap:
                self.failUnlessEqual(f[1]["rw_uri"], future_writecap)
            else:
                self.failIfIn("rw_uri", f[1])
            self.failUnlessEqual(f[1]["ro_uri"], future_readcap)
            self.failUnless("metadata" in f[1])
        d.addCallback(_check_json, expect_writecap=True)
        d.addCallback(lambda ign: self.GET(expected_info_url))
        def _check_info(res, expect_readcap):
            self.failUnlessIn("Object Type: <span>unknown</span>", res)
            self.failUnlessIn(future_writecap, res)
            if expect_readcap:
                self.failUnlessIn(future_readcap, res)
            self.failIfIn("Raw data as", res)
            self.failIfIn("Directory writecap", res)
            self.failIfIn("Checker Operations", res)
            self.failIfIn("Mutable File Operations", res)
            self.failIfIn("Directory Operations", res)
        d.addCallback(_check_info, expect_readcap=False)
        d.addCallback(lambda ign: self.GET(self.rooturl+"future?t=info"))
        d.addCallback(_check_info, expect_readcap=True)

        # and make sure that a read-only version of the directory can be
        # rendered too. This version will not have future_writecap
        d.addCallback(lambda ign: self.GET(self.rourl))
        d.addCallback(_check_html)
        d.addCallback(lambda ign: self.GET(self.rourl+"?t=json"))
        d.addCallback(_check_json, expect_writecap=False)
        return d

    def test_deep_check(self):
        self.basedir = "web/Grid/deep_check"
        self.set_up_grid()
        c0 = self.g.clients[0]
        self.uris = {}
        self.fileurls = {}
        DATA = "data" * 100
        d = c0.create_dirnode()
        def _stash_root_and_create_file(n):
            self.rootnode = n
            self.fileurls["root"] = "uri/" + urllib.quote(n.get_uri()) + "/"
            return n.add_file(u"good", upload.Data(DATA, convergence=""))
        d.addCallback(_stash_root_and_create_file)
        def _stash_uri(fn, which):
            self.uris[which] = fn.get_uri()
            return fn
        d.addCallback(_stash_uri, "good")
        d.addCallback(lambda ign:
                      self.rootnode.add_file(u"small",
                                             upload.Data("literal",
                                                        convergence="")))
        d.addCallback(_stash_uri, "small")
        d.addCallback(lambda ign:
                      self.rootnode.add_file(u"sick",
                                             upload.Data(DATA+"1",
                                                        convergence="")))
        d.addCallback(_stash_uri, "sick")

        # this tests that deep-check and stream-manifest will ignore
        # UnknownNode instances. Hopefully this will also cover deep-stats.
        future_writecap = "x-tahoe-crazy://I_am_from_the_future."
        future_readcap = "x-tahoe-crazy-readonly://I_am_from_the_future."
        future_node = UnknownNode(future_writecap, future_readcap)
        d.addCallback(lambda ign: self.rootnode.set_node(u"future",future_node))

        def _clobber_shares(ignored):
            self.delete_shares_numbered(self.uris["sick"], [0,1])
        d.addCallback(_clobber_shares)

        # root
        # root/good
        # root/small
        # root/sick
        # root/future

        d.addCallback(self.CHECK, "root", "t=stream-deep-check")
        def _done(res):
            try:
                units = [simplejson.loads(line)
                         for line in res.splitlines()
                         if line]
            except ValueError:
                print "response is:", res
                print "undecodeable line was '%s'" % line
                raise
            self.failUnlessEqual(len(units), 5+1)
            # should be parent-first
            u0 = units[0]
            self.failUnlessEqual(u0["path"], [])
            self.failUnlessEqual(u0["type"], "directory")
            self.failUnlessEqual(u0["cap"], self.rootnode.get_uri())
            u0cr = u0["check-results"]
            self.failUnlessEqual(u0cr["results"]["count-shares-good"], 10)

            ugood = [u for u in units
                     if u["type"] == "file" and u["path"] == [u"good"]][0]
            self.failUnlessEqual(ugood["cap"], self.uris["good"])
            ugoodcr = ugood["check-results"]
            self.failUnlessEqual(ugoodcr["results"]["count-shares-good"], 10)

            stats = units[-1]
            self.failUnlessEqual(stats["type"], "stats")
            s = stats["stats"]
            self.failUnlessEqual(s["count-immutable-files"], 2)
            self.failUnlessEqual(s["count-literal-files"], 1)
            self.failUnlessEqual(s["count-directories"], 1)
            self.failUnlessEqual(s["count-unknown"], 1)
        d.addCallback(_done)

        d.addCallback(self.CHECK, "root", "t=stream-manifest")
        def _check_manifest(res):
            self.failUnless(res.endswith("\n"))
            units = [simplejson.loads(t) for t in res[:-1].split("\n")]
            self.failUnlessEqual(len(units), 5+1)
            self.failUnlessEqual(units[-1]["type"], "stats")
            first = units[0]
            self.failUnlessEqual(first["path"], [])
            self.failUnlessEqual(first["cap"], self.rootnode.get_uri())
            self.failUnlessEqual(first["type"], "directory")
            stats = units[-1]["stats"]
            self.failUnlessEqual(stats["count-immutable-files"], 2)
            self.failUnlessEqual(stats["count-literal-files"], 1)
            self.failUnlessEqual(stats["count-mutable-files"], 0)
            self.failUnlessEqual(stats["count-immutable-files"], 2)
            self.failUnlessEqual(stats["count-unknown"], 1)
        d.addCallback(_check_manifest)

        # now add root/subdir and root/subdir/grandchild, then make subdir
        # unrecoverable, then see what happens

        d.addCallback(lambda ign:
                      self.rootnode.create_subdirectory(u"subdir"))
        d.addCallback(_stash_uri, "subdir")
        d.addCallback(lambda subdir_node:
                      subdir_node.add_file(u"grandchild",
                                           upload.Data(DATA+"2",
                                                       convergence="")))
        d.addCallback(_stash_uri, "grandchild")

        d.addCallback(lambda ign:
                      self.delete_shares_numbered(self.uris["subdir"],
                                                  range(1, 10)))

        # root
        # root/good
        # root/small
        # root/sick
        # root/future
        # root/subdir [unrecoverable]
        # root/subdir/grandchild

        # how should a streaming-JSON API indicate fatal error?
        # answer: emit ERROR: instead of a JSON string

        d.addCallback(self.CHECK, "root", "t=stream-manifest")
        def _check_broken_manifest(res):
            lines = res.splitlines()
            error_lines = [i
                           for (i,line) in enumerate(lines)
                           if line.startswith("ERROR:")]
            if not error_lines:
                self.fail("no ERROR: in output: %s" % (res,))
            first_error = error_lines[0]
            error_line = lines[first_error]
            error_msg = lines[first_error+1:]
            error_msg_s = "\n".join(error_msg) + "\n"
            self.failUnlessIn("ERROR: UnrecoverableFileError(no recoverable versions)",
                              error_line)
            self.failUnless(len(error_msg) > 2, error_msg_s) # some traceback
            units = [simplejson.loads(line) for line in lines[:first_error]]
            self.failUnlessEqual(len(units), 6) # includes subdir
            last_unit = units[-1]
            self.failUnlessEqual(last_unit["path"], ["subdir"])
        d.addCallback(_check_broken_manifest)

        d.addCallback(self.CHECK, "root", "t=stream-deep-check")
        def _check_broken_deepcheck(res):
            lines = res.splitlines()
            error_lines = [i
                           for (i,line) in enumerate(lines)
                           if line.startswith("ERROR:")]
            if not error_lines:
                self.fail("no ERROR: in output: %s" % (res,))
            first_error = error_lines[0]
            error_line = lines[first_error]
            error_msg = lines[first_error+1:]
            error_msg_s = "\n".join(error_msg) + "\n"
            self.failUnlessIn("ERROR: UnrecoverableFileError(no recoverable versions)",
                              error_line)
            self.failUnless(len(error_msg) > 2, error_msg_s) # some traceback
            units = [simplejson.loads(line) for line in lines[:first_error]]
            self.failUnlessEqual(len(units), 6) # includes subdir
            last_unit = units[-1]
            self.failUnlessEqual(last_unit["path"], ["subdir"])
            r = last_unit["check-results"]["results"]
            self.failUnlessEqual(r["count-recoverable-versions"], 0)
            self.failUnlessEqual(r["count-shares-good"], 1)
            self.failUnlessEqual(r["recoverable"], False)
        d.addCallback(_check_broken_deepcheck)

        d.addErrback(self.explain_web_error)
        return d

    def test_deep_check_and_repair(self):
        self.basedir = "web/Grid/deep_check_and_repair"
        self.set_up_grid()
        c0 = self.g.clients[0]
        self.uris = {}
        self.fileurls = {}
        DATA = "data" * 100
        d = c0.create_dirnode()
        def _stash_root_and_create_file(n):
            self.rootnode = n
            self.fileurls["root"] = "uri/" + urllib.quote(n.get_uri()) + "/"
            return n.add_file(u"good", upload.Data(DATA, convergence=""))
        d.addCallback(_stash_root_and_create_file)
        def _stash_uri(fn, which):
            self.uris[which] = fn.get_uri()
        d.addCallback(_stash_uri, "good")
        d.addCallback(lambda ign:
                      self.rootnode.add_file(u"small",
                                             upload.Data("literal",
                                                        convergence="")))
        d.addCallback(_stash_uri, "small")
        d.addCallback(lambda ign:
                      self.rootnode.add_file(u"sick",
                                             upload.Data(DATA+"1",
                                                        convergence="")))
        d.addCallback(_stash_uri, "sick")
        #d.addCallback(lambda ign:
        #              self.rootnode.add_file(u"dead",
        #                                     upload.Data(DATA+"2",
        #                                                convergence="")))
        #d.addCallback(_stash_uri, "dead")

        #d.addCallback(lambda ign: c0.create_mutable_file("mutable"))
        #d.addCallback(lambda fn: self.rootnode.set_node(u"corrupt", fn))
        #d.addCallback(_stash_uri, "corrupt")

        def _clobber_shares(ignored):
            good_shares = self.find_shares(self.uris["good"])
            self.failUnlessEqual(len(good_shares), 10)
            sick_shares = self.find_shares(self.uris["sick"])
            os.unlink(sick_shares[0][2])
            #dead_shares = self.find_shares(self.uris["dead"])
            #for i in range(1, 10):
            #    os.unlink(dead_shares[i][2])

            #c_shares = self.find_shares(self.uris["corrupt"])
            #cso = CorruptShareOptions()
            #cso.stdout = StringIO()
            #cso.parseOptions([c_shares[0][2]])
            #corrupt_share(cso)
        d.addCallback(_clobber_shares)

        # root
        # root/good   CHK, 10 shares
        # root/small  LIT
        # root/sick   CHK, 9 shares

        d.addCallback(self.CHECK, "root", "t=stream-deep-check&repair=true")
        def _done(res):
            units = [simplejson.loads(line)
                     for line in res.splitlines()
                     if line]
            self.failUnlessEqual(len(units), 4+1)
            # should be parent-first
            u0 = units[0]
            self.failUnlessEqual(u0["path"], [])
            self.failUnlessEqual(u0["type"], "directory")
            self.failUnlessEqual(u0["cap"], self.rootnode.get_uri())
            u0crr = u0["check-and-repair-results"]
            self.failUnlessEqual(u0crr["repair-attempted"], False)
            self.failUnlessEqual(u0crr["pre-repair-results"]["results"]["count-shares-good"], 10)

            ugood = [u for u in units
                     if u["type"] == "file" and u["path"] == [u"good"]][0]
            self.failUnlessEqual(ugood["cap"], self.uris["good"])
            ugoodcrr = ugood["check-and-repair-results"]
            self.failUnlessEqual(u0crr["repair-attempted"], False)
            self.failUnlessEqual(u0crr["pre-repair-results"]["results"]["count-shares-good"], 10)

            usick = [u for u in units
                     if u["type"] == "file" and u["path"] == [u"sick"]][0]
            self.failUnlessEqual(usick["cap"], self.uris["sick"])
            usickcrr = usick["check-and-repair-results"]
            self.failUnlessEqual(usickcrr["repair-attempted"], True)
            self.failUnlessEqual(usickcrr["repair-successful"], True)
            self.failUnlessEqual(usickcrr["pre-repair-results"]["results"]["count-shares-good"], 9)
            self.failUnlessEqual(usickcrr["post-repair-results"]["results"]["count-shares-good"], 10)

            stats = units[-1]
            self.failUnlessEqual(stats["type"], "stats")
            s = stats["stats"]
            self.failUnlessEqual(s["count-immutable-files"], 2)
            self.failUnlessEqual(s["count-literal-files"], 1)
            self.failUnlessEqual(s["count-directories"], 1)
        d.addCallback(_done)

        d.addErrback(self.explain_web_error)
        return d

    def _count_leases(self, ignored, which):
        u = self.uris[which]
        shares = self.find_shares(u)
        lease_counts = []
        for shnum, serverid, fn in shares:
            sf = get_share_file(fn)
            num_leases = len(list(sf.get_leases()))
        lease_counts.append( (fn, num_leases) )
        return lease_counts

    def _assert_leasecount(self, lease_counts, expected):
        for (fn, num_leases) in lease_counts:
            if num_leases != expected:
                self.fail("expected %d leases, have %d, on %s" %
                          (expected, num_leases, fn))

    def test_add_lease(self):
        self.basedir = "web/Grid/add_lease"
        self.set_up_grid(num_clients=2)
        c0 = self.g.clients[0]
        self.uris = {}
        DATA = "data" * 100
        d = c0.upload(upload.Data(DATA, convergence=""))
        def _stash_uri(ur, which):
            self.uris[which] = ur.uri
        d.addCallback(_stash_uri, "one")
        d.addCallback(lambda ign:
                      c0.upload(upload.Data(DATA+"1", convergence="")))
        d.addCallback(_stash_uri, "two")
        def _stash_mutable_uri(n, which):
            self.uris[which] = n.get_uri()
            assert isinstance(self.uris[which], str)
        d.addCallback(lambda ign: c0.create_mutable_file(DATA+"2"))
        d.addCallback(_stash_mutable_uri, "mutable")

        def _compute_fileurls(ignored):
            self.fileurls = {}
            for which in self.uris:
                self.fileurls[which] = "uri/" + urllib.quote(self.uris[which])
        d.addCallback(_compute_fileurls)

        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "two")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        d.addCallback(self.CHECK, "one", "t=check") # no add-lease
        def _got_html_good(res):
            self.failUnless("Healthy" in res, res)
            self.failIf("Not Healthy" in res, res)
        d.addCallback(_got_html_good)

        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "two")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        # this CHECK uses the original client, which uses the same
        # lease-secrets, so it will just renew the original lease
        d.addCallback(self.CHECK, "one", "t=check&add-lease=true")
        d.addCallback(_got_html_good)

        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "two")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        # this CHECK uses an alternate client, which adds a second lease
        d.addCallback(self.CHECK, "one", "t=check&add-lease=true", clientnum=1)
        d.addCallback(_got_html_good)

        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 2)
        d.addCallback(self._count_leases, "two")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        d.addCallback(self.CHECK, "mutable", "t=check&add-lease=true")
        d.addCallback(_got_html_good)

        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 2)
        d.addCallback(self._count_leases, "two")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        d.addCallback(self.CHECK, "mutable", "t=check&add-lease=true",
                      clientnum=1)
        d.addCallback(_got_html_good)

        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 2)
        d.addCallback(self._count_leases, "two")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 2)

        d.addErrback(self.explain_web_error)
        return d

    def test_deep_add_lease(self):
        self.basedir = "web/Grid/deep_add_lease"
        self.set_up_grid(num_clients=2)
        c0 = self.g.clients[0]
        self.uris = {}
        self.fileurls = {}
        DATA = "data" * 100
        d = c0.create_dirnode()
        def _stash_root_and_create_file(n):
            self.rootnode = n
            self.uris["root"] = n.get_uri()
            self.fileurls["root"] = "uri/" + urllib.quote(n.get_uri()) + "/"
            return n.add_file(u"one", upload.Data(DATA, convergence=""))
        d.addCallback(_stash_root_and_create_file)
        def _stash_uri(fn, which):
            self.uris[which] = fn.get_uri()
        d.addCallback(_stash_uri, "one")
        d.addCallback(lambda ign:
                      self.rootnode.add_file(u"small",
                                             upload.Data("literal",
                                                        convergence="")))
        d.addCallback(_stash_uri, "small")

        d.addCallback(lambda ign: c0.create_mutable_file("mutable"))
        d.addCallback(lambda fn: self.rootnode.set_node(u"mutable", fn))
        d.addCallback(_stash_uri, "mutable")

        d.addCallback(self.CHECK, "root", "t=stream-deep-check") # no add-lease
        def _done(res):
            units = [simplejson.loads(line)
                     for line in res.splitlines()
                     if line]
            # root, one, small, mutable,   stats
            self.failUnlessEqual(len(units), 4+1)
        d.addCallback(_done)

        d.addCallback(self._count_leases, "root")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        d.addCallback(self.CHECK, "root", "t=stream-deep-check&add-lease=true")
        d.addCallback(_done)

        d.addCallback(self._count_leases, "root")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 1)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 1)

        d.addCallback(self.CHECK, "root", "t=stream-deep-check&add-lease=true",
                      clientnum=1)
        d.addCallback(_done)

        d.addCallback(self._count_leases, "root")
        d.addCallback(self._assert_leasecount, 2)
        d.addCallback(self._count_leases, "one")
        d.addCallback(self._assert_leasecount, 2)
        d.addCallback(self._count_leases, "mutable")
        d.addCallback(self._assert_leasecount, 2)

        d.addErrback(self.explain_web_error)
        return d


    def test_exceptions(self):
        self.basedir = "web/Grid/exceptions"
        self.set_up_grid(num_clients=1, num_servers=2)
        c0 = self.g.clients[0]
        self.fileurls = {}
        DATA = "data" * 100
        d = c0.create_dirnode()
        def _stash_root(n):
            self.fileurls["root"] = "uri/" + urllib.quote(n.get_uri()) + "/"
            self.fileurls["imaginary"] = self.fileurls["root"] + "imaginary"
            return n
        d.addCallback(_stash_root)
        d.addCallback(lambda ign: c0.upload(upload.Data(DATA, convergence="")))
        def _stash_bad(ur):
            self.fileurls["1share"] = "uri/" + urllib.quote(ur.uri)
            self.delete_shares_numbered(ur.uri, range(1,10))

            u = uri.from_string(ur.uri)
            u.key = testutil.flip_bit(u.key, 0)
            baduri = u.to_string()
            self.fileurls["0shares"] = "uri/" + urllib.quote(baduri)
        d.addCallback(_stash_bad)
        d.addCallback(lambda ign: c0.create_dirnode())
        def _mangle_dirnode_1share(n):
            u = n.get_uri()
            url = self.fileurls["dir-1share"] = "uri/" + urllib.quote(u) + "/"
            self.fileurls["dir-1share-json"] = url + "?t=json"
            self.delete_shares_numbered(u, range(1,10))
        d.addCallback(_mangle_dirnode_1share)
        d.addCallback(lambda ign: c0.create_dirnode())
        def _mangle_dirnode_0share(n):
            u = n.get_uri()
            url = self.fileurls["dir-0share"] = "uri/" + urllib.quote(u) + "/"
            self.fileurls["dir-0share-json"] = url + "?t=json"
            self.delete_shares_numbered(u, range(0,10))
        d.addCallback(_mangle_dirnode_0share)

        # NotEnoughSharesError should be reported sensibly, with a
        # text/plain explanation of the problem, and perhaps some
        # information on which shares *could* be found.

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET unrecoverable",
                                           410, "Gone", "NoSharesError",
                                           self.GET, self.fileurls["0shares"]))
        def _check_zero_shares(body):
            self.failIf("<html>" in body, body)
            body = " ".join(body.strip().split())
            exp = ("NoSharesError: no shares could be found. "
                   "Zero shares usually indicates a corrupt URI, or that "
                   "no servers were connected, but it might also indicate "
                   "severe corruption. You should perform a filecheck on "
                   "this object to learn more. The full error message is: "
                   "Failed to get enough shareholders: have 0, need 3")
            self.failUnlessEqual(exp, body)
        d.addCallback(_check_zero_shares)


        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET 1share",
                                           410, "Gone", "NotEnoughSharesError",
                                           self.GET, self.fileurls["1share"]))
        def _check_one_share(body):
            self.failIf("<html>" in body, body)
            body = " ".join(body.strip().split())
            exp = ("NotEnoughSharesError: This indicates that some "
                   "servers were unavailable, or that shares have been "
                   "lost to server departure, hard drive failure, or disk "
                   "corruption. You should perform a filecheck on "
                   "this object to learn more. The full error message is:"
                   " Failed to get enough shareholders: have 1, need 3")
            self.failUnlessEqual(exp, body)
        d.addCallback(_check_one_share)

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET imaginary",
                                           404, "Not Found", None,
                                           self.GET, self.fileurls["imaginary"]))
        def _missing_child(body):
            self.failUnless("No such child: imaginary" in body, body)
        d.addCallback(_missing_child)

        d.addCallback(lambda ignored: self.GET(self.fileurls["dir-0share"]))
        def _check_0shares_dir_html(body):
            self.failUnless("<html>" in body, body)
            # we should see the regular page, but without the child table or
            # the dirops forms
            body = " ".join(body.strip().split())
            self.failUnlessIn('href="?t=info">More info on this directory',
                              body)
            exp = ("UnrecoverableFileError: the directory (or mutable file) "
                   "could not be retrieved, because there were insufficient "
                   "good shares. This might indicate that no servers were "
                   "connected, insufficient servers were connected, the URI "
                   "was corrupt, or that shares have been lost due to server "
                   "departure, hard drive failure, or disk corruption. You "
                   "should perform a filecheck on this object to learn more.")
            self.failUnlessIn(exp, body)
            self.failUnlessIn("No upload forms: directory is unreadable", body)
        d.addCallback(_check_0shares_dir_html)

        d.addCallback(lambda ignored: self.GET(self.fileurls["dir-1share"]))
        def _check_1shares_dir_html(body):
            # at some point, we'll split UnrecoverableFileError into 0-shares
            # and some-shares like we did for immutable files (since there
            # are different sorts of advice to offer in each case). For now,
            # they present the same way.
            self.failUnless("<html>" in body, body)
            body = " ".join(body.strip().split())
            self.failUnlessIn('href="?t=info">More info on this directory',
                              body)
            exp = ("UnrecoverableFileError: the directory (or mutable file) "
                   "could not be retrieved, because there were insufficient "
                   "good shares. This might indicate that no servers were "
                   "connected, insufficient servers were connected, the URI "
                   "was corrupt, or that shares have been lost due to server "
                   "departure, hard drive failure, or disk corruption. You "
                   "should perform a filecheck on this object to learn more.")
            self.failUnlessIn(exp, body)
            self.failUnlessIn("No upload forms: directory is unreadable", body)
        d.addCallback(_check_1shares_dir_html)

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET dir-0share-json",
                                           410, "Gone", "UnrecoverableFileError",
                                           self.GET,
                                           self.fileurls["dir-0share-json"]))
        def _check_unrecoverable_file(body):
            self.failIf("<html>" in body, body)
            body = " ".join(body.strip().split())
            exp = ("UnrecoverableFileError: the directory (or mutable file) "
                   "could not be retrieved, because there were insufficient "
                   "good shares. This might indicate that no servers were "
                   "connected, insufficient servers were connected, the URI "
                   "was corrupt, or that shares have been lost due to server "
                   "departure, hard drive failure, or disk corruption. You "
                   "should perform a filecheck on this object to learn more.")
            self.failUnlessEqual(exp, body)
        d.addCallback(_check_unrecoverable_file)

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET dir-1share-json",
                                           410, "Gone", "UnrecoverableFileError",
                                           self.GET,
                                           self.fileurls["dir-1share-json"]))
        d.addCallback(_check_unrecoverable_file)

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET imaginary",
                                           404, "Not Found", None,
                                           self.GET, self.fileurls["imaginary"]))

        # attach a webapi child that throws a random error, to test how it
        # gets rendered.
        w = c0.getServiceNamed("webish")
        w.root.putChild("ERRORBOOM", ErrorBoom())

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET errorboom_html",
                                           500, "Internal Server Error", None,
                                           self.GET, "ERRORBOOM"))
        def _internal_error_html(body):
            # test that a weird exception during a webapi operation with
            # Accept:*/* results in a text/html stack trace, while one
            # without that Accept: line gets us a text/plain stack trace
            self.failUnless("<html>" in body, "expected HTML, not '%s'" % body)
        d.addCallback(_internal_error_html)

        d.addCallback(lambda ignored:
                      self.shouldHTTPError("GET errorboom_text",
                                           500, "Internal Server Error", None,
                                           self.GET, "ERRORBOOM",
                                           headers={"accept": ["text/plain"]}))
        def _internal_error_text(body):
            # test that a weird exception during a webapi operation with
            # Accept:*/* results in a text/html stack trace, while one
            # without that Accept: line gets us a text/plain stack trace
            self.failIf("<html>" in body, body)
            self.failUnless(body.startswith("Traceback "), body)
        d.addCallback(_internal_error_text)

        def _flush_errors(res):
            # Trial: please ignore the CompletelyUnhandledError in the logs
            self.flushLoggedErrors(CompletelyUnhandledError)
            return res
        d.addBoth(_flush_errors)

        return d

class CompletelyUnhandledError(Exception):
    pass
class ErrorBoom(rend.Page):
    def beforeRender(self, ctx):
        raise CompletelyUnhandledError("whoops")