import re, time from twisted.application import service, strports, internet from twisted.web import http from twisted.internet import defer from nevow import appserver, inevow, static from allmydata.util import log, fileutil from allmydata.web import introweb, root from allmydata.web.common import IOpHandleTable, MyExceptionHandler # we must override twisted.web.http.Request.requestReceived with a version # that doesn't use cgi.parse_multipart() . Since we actually use Nevow, we # override the nevow-specific subclass, nevow.appserver.NevowRequest . This # is an exact copy of twisted.web.http.Request (from SVN HEAD on 10-Aug-2007) # that modifies the way form arguments are parsed. Note that this sort of # surgery may induce a dependency upon a particular version of twisted.web parse_qs = http.parse_qs class MyRequest(appserver.NevowRequest): fields = None _tahoe_request_had_error = None def requestReceived(self, command, path, version): """Called by channel when all data has been received. This method is not intended for users. """ self.content.seek(0,0) self.args = {} self.stack = [] self.method, self.uri = command, path self.clientproto = version x = self.uri.split('?', 1) if len(x) == 1: self.path = self.uri else: self.path, argstring = x self.args = parse_qs(argstring, 1) # cache the client and server information, we'll need this later to be # serialized and sent with the request so CGIs will work remotely self.client = self.channel.transport.getPeer() self.host = self.channel.transport.getHost() # Argument processing. ## The original twisted.web.http.Request.requestReceived code parsed the ## content and added the form fields it found there to self.args . It ## did this with cgi.parse_multipart, which holds the arguments in RAM ## and is thus unsuitable for large file uploads. The Nevow subclass ## (nevow.appserver.NevowRequest) uses cgi.FieldStorage instead (putting ## the results in self.fields), which is much more memory-efficient. ## Since we know we're using Nevow, we can anticipate these arguments ## appearing in self.fields instead of self.args, and thus skip the ## parse-content-into-self.args step. ## args = self.args ## ctype = self.getHeader('content-type') ## if self.method == "POST" and ctype: ## mfd = 'multipart/form-data' ## key, pdict = cgi.parse_header(ctype) ## if key == 'application/x-www-form-urlencoded': ## args.update(parse_qs(self.content.read(), 1)) ## elif key == mfd: ## try: ## args.update(cgi.parse_multipart(self.content, pdict)) ## except KeyError, e: ## if e.args[0] == 'content-disposition': ## # Parse_multipart can't cope with missing ## # content-dispostion headers in multipart/form-data ## # parts, so we catch the exception and tell the client ## # it was a bad request. ## self.channel.transport.write( ## "HTTP/1.1 400 Bad Request\r\n\r\n") ## self.channel.transport.loseConnection() ## return ## raise self.processing_started_timestamp = time.time() self.process() def _logger(self): # we build up a log string that hides most of the cap, to preserve # user privacy. We retain the query args so we can identify things # like t=json. Then we send it to the flog. We make no attempt to # match apache formatting. TODO: when we move to DSA dirnodes and # shorter caps, consider exposing a few characters of the cap, or # maybe a few characters of its hash. x = self.uri.split("?", 1) if len(x) == 1: # no query args path = self.uri queryargs = "" else: path, queryargs = x # there is a form handler which redirects POST /uri?uri=FOO into # GET /uri/FOO so folks can paste in non-HTTP-prefixed uris. Make # sure we censor these too. if queryargs.startswith("uri="): queryargs = "[uri=CENSORED]" queryargs = "?" + queryargs if path.startswith("/uri"): path = "/uri/[CENSORED].." elif path.startswith("/file"): path = "/file/[CENSORED].." elif path.startswith("/named"): path = "/named/[CENSORED].." uri = path + queryargs error = "" if self._tahoe_request_had_error: error = " [ERROR]" log.msg(format="web: %(clientip)s %(method)s %(uri)s %(code)s %(length)s%(error)s", clientip=self.getClientIP(), method=self.method, uri=uri, code=self.code, length=(self.sentLength or "-"), error=error, facility="tahoe.webish", level=log.OPERATIONAL, ) class WebishServer(service.MultiService): name = "webish" def __init__(self, client, webport, nodeurl_path=None, staticdir=None, clock=None): service.MultiService.__init__(self) # the 'data' argument to all render() methods default to the Client # the 'clock' argument to root.Root is, if set, a # twisted.internet.task.Clock that is provided by the unit tests # so that they can test features that involve the passage of # time in a deterministic manner. self.root = root.Root(client, clock) self.buildServer(webport, nodeurl_path, staticdir) if self.root.child_operations: self.site.remember(self.root.child_operations, IOpHandleTable) self.root.child_operations.setServiceParent(self) def buildServer(self, webport, nodeurl_path, staticdir): self.webport = webport self.site = site = appserver.NevowSite(self.root) self.site.requestFactory = MyRequest self.site.remember(MyExceptionHandler(), inevow.ICanHandleException) if staticdir: self.root.putChild("static", static.File(staticdir)) if re.search(r'^\d', webport): webport = "tcp:"+webport # twisted warns about bare "0" or "3456" s = strports.service(webport, site) s.setServiceParent(self) self._scheme = None self._portnum = None self._url = None self._listener = s # stash it so we can query for the portnum self._started = defer.Deferred() if nodeurl_path: def _write_nodeurl_file(ign): # this file will be created with default permissions fileutil.write(nodeurl_path, self.getURL() + "\n") self._started.addCallback(_write_nodeurl_file) def getURL(self): assert self._url return self._url def getPortnum(self): assert self._portnum return self._portnum def startService(self): def _got_port(lp): self._portnum = lp.getHost().port # what is our webport? assert self._scheme self._url = "%s://127.0.0.1:%d/" % (self._scheme, self._portnum) self._started.callback(None) return lp def _fail(f): self._started.errback(f) return f service.MultiService.startService(self) s = self._listener if hasattr(s, 'endpoint') and hasattr(s, '_waitingForPort'): # Twisted 10.2 gives us a StreamServerEndpointService. This is # ugly but should do for now. classname = s.endpoint.__class__.__name__ if classname.startswith('SSL'): self._scheme = 'https' else: self._scheme = 'http' s._waitingForPort.addCallbacks(_got_port, _fail) elif isinstance(s, internet.TCPServer): # Twisted <= 10.1 self._scheme = 'http' _got_port(s._port) elif isinstance(s, internet.SSLServer): # Twisted <= 10.1 self._scheme = 'https' _got_port(s._port) else: # who knows, probably some weirdo future version of Twisted self._started.errback(AssertionError("couldn't find out the scheme or port for the web-API server")) class IntroducerWebishServer(WebishServer): def __init__(self, introducer, webport, nodeurl_path=None, staticdir=None): service.MultiService.__init__(self) self.root = introweb.IntroducerRoot(introducer) self.buildServer(webport, nodeurl_path, staticdir)