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#527: support HTTP 'Range:' requests, using a cachefile. Adds filenode.read(consumer, offset, size) method. Still needs: cache expiration, reduced alacrity.

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This commit is contained in:
Brian Warner
2008-10-28 13:41:04 -07:00
parent 2d4e895096
commit 37e3d8e47c
10 changed files with 457 additions and 128 deletions
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10
src/allmydata/client.py
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@ -18,7 +18,7 @@ from allmydata.immutable.filenode import FileNode, LiteralFileNode
from allmydata.offloaded import Helper
from allmydata.control import ControlServer
from allmydata.introducer.client import IntroducerClient
from allmydata.util import hashutil, base32, testutil
from allmydata.util import hashutil, base32, testutil, fileutil
from allmydata.uri import LiteralFileURI
from allmydata.dirnode import NewDirectoryNode
from allmydata.mutable.node import MutableFileNode, MutableWatcher
@ -188,6 +188,9 @@ class Client(node.Node, testutil.PollMixin):
self.convergence = base32.a2b(convergence_s)
self._node_cache = weakref.WeakValueDictionary() # uri -> node
self.add_service(Uploader(helper_furl, self.stats_provider))
self.download_cachedir = os.path.join(self.basedir,
"private", "cache", "download")
fileutil.make_dirs(self.download_cachedir)
self.add_service(Downloader(self.stats_provider))
self.add_service(MutableWatcher(self.stats_provider))
def _publish(res):
@ -334,7 +337,10 @@ class Client(node.Node, testutil.PollMixin):
if isinstance(u, LiteralFileURI):
node = LiteralFileNode(u, self) # LIT
else:
node = FileNode(u, self) # CHK
cachefile = os.path.join(self.download_cachedir,
base32.b2a(u.storage_index))
# TODO: cachefile manager, weakref, expire policy
node = FileNode(u, self, cachefile) # CHK
else:
assert IMutableFileURI.providedBy(u), u
node = MutableFileNode(self).init_from_uri(u)