from nevow import url, rend
from nevow.inevow import IRequest
-from allmydata.interfaces import ExistingChildError, CannotPackUnknownNodeError
+from allmydata.interfaces import ExistingChildError, SDMF_VERSION, MDMF_VERSION
from allmydata.monitor import Monitor
from allmydata.immutable.upload import FileHandle
-from allmydata.unknown import UnknownNode
+from allmydata.mutable.publish import MutableFileHandle
+from allmydata.mutable.common import MODE_READ
from allmydata.util import log, base32
+from allmydata.util.encodingutil import quote_output
+from allmydata.blacklist import FileProhibited, ProhibitedNode
from allmydata.web.common import text_plain, WebError, RenderMixin, \
boolean_of_arg, get_arg, should_create_intermediate_directories, \
- MyExceptionHandler, parse_replace_arg
+ MyExceptionHandler, parse_replace_arg, parse_offset_arg, \
+ parse_mutable_type_arg
from allmydata.web.check_results import CheckResults, \
CheckAndRepairResults, LiteralCheckResults
from allmydata.web.info import MoreInfo
class ReplaceMeMixin:
-
def replace_me_with_a_child(self, req, client, replace):
# a new file is being uploaded in our place.
mutable = boolean_of_arg(get_arg(req, "mutable", "false"))
if mutable:
- req.content.seek(0)
- data = req.content.read()
- d = client.create_mutable_file(data)
+ arg = get_arg(req, "mutable-type", None)
+ mutable_type = parse_mutable_type_arg(arg)
+ if mutable_type is "invalid":
+ raise WebError("Unknown type: %s" % arg, http.BAD_REQUEST)
+
+ data = MutableFileHandle(req.content)
+ d = client.create_mutable_file(data, version=mutable_type)
def _uploaded(newnode):
d2 = self.parentnode.set_node(self.name, newnode,
overwrite=replace)
overwrite=replace)
def _done(filenode):
log.msg("webish upload complete",
- facility="tahoe.webish", level=log.NOISY)
+ facility="tahoe.webish", level=log.NOISY, umid="TCjBGQ")
if self.node:
# we've replaced an existing file (or modified a mutable
# file), so the response code is 200
def replace_me_with_a_childcap(self, req, client, replace):
req.content.seek(0)
childcap = req.content.read()
- childnode = client.create_node_from_uri(childcap, childcap+"readonly")
- if isinstance(childnode, UnknownNode):
- # don't be willing to pack unknown nodes: we might accidentally
- # put some write-authority into the rocap slot because we don't
- # know how to diminish the URI they gave us. We don't even know
- # if they gave us a readcap or a writecap.
- msg = "cannot attach unknown node as child %s" % str(self.name)
- raise CannotPackUnknownNodeError(msg)
+ childnode = client.create_node_from_uri(childcap, None, name=self.name)
d = self.parentnode.set_node(self.name, childnode, overwrite=replace)
d.addCallback(lambda res: childnode.get_uri())
return d
- def _read_data_from_formpost(self, req):
- # SDMF: files are small, and we can only upload data, so we read
- # the whole file into memory before uploading.
- contents = req.fields["file"]
- contents.file.seek(0)
- data = contents.file.read()
- return data
def replace_me_with_a_formpost(self, req, client, replace):
# create a new file, maybe mutable, maybe immutable
mutable = boolean_of_arg(get_arg(req, "mutable", "false"))
+ # create an immutable file
+ contents = req.fields["file"]
if mutable:
- data = self._read_data_from_formpost(req)
- d = client.create_mutable_file(data)
+ arg = get_arg(req, "mutable-type", None)
+ mutable_type = parse_mutable_type_arg(arg)
+ if mutable_type is "invalid":
+ raise WebError("Unknown type: %s" % arg, http.BAD_REQUEST)
+ uploadable = MutableFileHandle(contents.file)
+ d = client.create_mutable_file(uploadable, version=mutable_type)
def _uploaded(newnode):
d2 = self.parentnode.set_node(self.name, newnode,
overwrite=replace)
return d2
d.addCallback(_uploaded)
return d
- # create an immutable file
- contents = req.fields["file"]
+
uploadable = FileHandle(contents.file, convergence=client.convergence)
d = self.parentnode.add_file(self.name, uploadable, overwrite=replace)
d.addCallback(lambda newnode: newnode.get_uri())
return d
+
class PlaceHolderNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
def __init__(self, client, parentnode, name):
rend.Page.__init__(self)
def childFactory(self, ctx, name):
req = IRequest(ctx)
+ if isinstance(self.node, ProhibitedNode):
+ raise FileProhibited(self.node.reason)
if should_create_intermediate_directories(req):
- raise WebError("Cannot create directory '%s', because its "
- "parent is a file, not a directory" % name)
- raise WebError("Files have no children, certainly not named '%s'"
- % name)
+ raise WebError("Cannot create directory %s, because its "
+ "parent is a file, not a directory" % quote_output(name, encoding='utf-8'))
+ raise WebError("Files have no children, certainly not named %s"
+ % quote_output(name, encoding='utf-8'))
def render_GET(self, ctx):
req = IRequest(ctx)
# properly. So we assume that at least the browser will agree
# with itself, and echo back the same bytes that we were given.
filename = get_arg(req, "filename", self.name) or "unknown"
- if self.node.is_mutable():
- # some day: d = self.node.get_best_version()
- d = makeMutableDownloadable(self.node)
- else:
- d = defer.succeed(self.node)
+ d = self.node.get_best_readable_version()
d.addCallback(lambda dn: FileDownloader(dn, filename))
return d
if t == "json":
- if self.parentnode and self.name:
- d = self.parentnode.get_metadata_for(self.name)
+ # We do this to make sure that fields like size and
+ # mutable-type (which depend on the file on the grid and not
+ # just on the cap) are filled in. The latter gets used in
+ # tests, in particular.
+ #
+ # TODO: Make it so that the servermap knows how to update in
+ # a mode specifically designed to fill in these fields, and
+ # then update it in that mode.
+ if self.node.is_mutable():
+ d = self.node.get_servermap(MODE_READ)
else:
d = defer.succeed(None)
+ if self.parentnode and self.name:
+ d.addCallback(lambda ignored:
+ self.parentnode.get_metadata_for(self.name))
+ else:
+ d.addCallback(lambda ignored: None)
d.addCallback(lambda md: FileJSONMetadata(ctx, self.node, md))
return d
if t == "info":
if t:
raise WebError("GET file: bad t=%s" % t)
filename = get_arg(req, "filename", self.name) or "unknown"
- if self.node.is_mutable():
- # some day: d = self.node.get_best_version()
- d = makeMutableDownloadable(self.node)
- else:
- d = defer.succeed(self.node)
+ d = self.node.get_best_readable_version()
d.addCallback(lambda dn: FileDownloader(dn, filename))
return d
req = IRequest(ctx)
t = get_arg(req, "t", "").strip()
replace = parse_replace_arg(get_arg(req, "replace", "true"))
+ offset = parse_offset_arg(get_arg(req, "offset", None))
if not t:
- if self.node.is_mutable():
- return self.replace_my_contents(req)
if not replace:
# this is the early trap: if someone else modifies the
# directory while we're uploading, the add_file(overwrite=)
# call in replace_me_with_a_child will do the late trap.
raise ExistingChildError()
- assert self.parentnode and self.name
- return self.replace_me_with_a_child(req, self.client, replace)
+
+ if self.node.is_mutable():
+ # Are we a readonly filenode? We shouldn't allow callers
+ # to try to replace us if we are.
+ if self.node.is_readonly():
+ raise WebError("PUT to a mutable file: replace or update"
+ " requested with read-only cap")
+ if offset is None:
+ return self.replace_my_contents(req)
+
+ if offset >= 0:
+ return self.update_my_contents(req, offset)
+
+ raise WebError("PUT to a mutable file: Invalid offset")
+
+ else:
+ if offset is not None:
+ raise WebError("PUT to a file: append operation invoked "
+ "on an immutable cap")
+
+ assert self.parentnode and self.name
+ return self.replace_me_with_a_child(req, self.client, replace)
+
if t == "uri":
if not replace:
raise ExistingChildError()
def replace_my_contents(self, req):
req.content.seek(0)
- new_contents = req.content.read()
+ new_contents = MutableFileHandle(req.content)
d = self.node.overwrite(new_contents)
d.addCallback(lambda res: self.node.get_uri())
return d
+
+ def update_my_contents(self, req, offset):
+ req.content.seek(0)
+ added_contents = MutableFileHandle(req.content)
+
+ d = self.node.get_best_mutable_version()
+ d.addCallback(lambda mv:
+ mv.update(added_contents, offset))
+ d.addCallback(lambda ignored:
+ self.node.get_uri())
+ return d
+
+
def replace_my_contents_with_a_formpost(self, req):
# we have a mutable file. Get the data from the formpost, and replace
# the mutable file's contents with it.
- new_contents = self._read_data_from_formpost(req)
+ new_contents = req.fields['file']
+ new_contents = MutableFileHandle(new_contents.file)
+
d = self.node.overwrite(new_contents)
d.addCallback(lambda res: self.node.get_uri())
return d
-class MutableDownloadable:
- #implements(IDownloadable)
- def __init__(self, size, node):
- self.size = size
- self.node = node
- def get_size(self):
- return self.size
- def is_mutable(self):
- return True
- def read(self, consumer, offset=0, size=None):
- d = self.node.download_best_version()
- d.addCallback(self._got_data, consumer, offset, size)
- return d
- def _got_data(self, contents, consumer, offset, size):
- start = offset
- if size is not None:
- end = offset+size
- else:
- end = self.size
- # SDMF: we can write the whole file in one big chunk
- consumer.write(contents[start:end])
- return consumer
-
-def makeMutableDownloadable(n):
- d = defer.maybeDeferred(n.get_size_of_best_version)
- d.addCallback(MutableDownloadable, n)
- return d
class FileDownloader(rend.Page):
- # since we override the rendering process (to let the tahoe Downloader
- # drive things), we must inherit from regular old twisted.web.resource
- # instead of nevow.rend.Page . Nevow will use adapters to wrap a
- # nevow.appserver.OldResourceAdapter around any
- # twisted.web.resource.IResource that it is given. TODO: it looks like
- # that wrapper would allow us to return a Deferred from render(), which
- # might could simplify the implementation of WebDownloadTarget.
-
def __init__(self, filenode, filename):
rend.Page.__init__(self)
self.filenode = filenode
self.filename = filename
+ def parse_range_header(self, range):
+ # Parse a byte ranges according to RFC 2616 "14.35.1 Byte
+ # Ranges". Returns None if the range doesn't make sense so it
+ # can be ignored (per the spec). When successful, returns a
+ # list of (first,last) inclusive range tuples.
+
+ filesize = self.filenode.get_size()
+ assert isinstance(filesize, (int,long)), filesize
+
+ try:
+ # byte-ranges-specifier
+ units, rangeset = range.split('=', 1)
+ if units != 'bytes':
+ return None # nothing else supported
+
+ def parse_range(r):
+ first, last = r.split('-', 1)
+
+ if first is '':
+ # suffix-byte-range-spec
+ first = filesize - long(last)
+ last = filesize - 1
+ else:
+ # byte-range-spec
+
+ # first-byte-pos
+ first = long(first)
+
+ # last-byte-pos
+ if last is '':
+ last = filesize - 1
+ else:
+ last = long(last)
+
+ if last < first:
+ raise ValueError
+
+ return (first, last)
+
+ # byte-range-set
+ #
+ # Note: the spec uses "1#" for the list of ranges, which
+ # implicitly allows whitespace around the ',' separators,
+ # so strip it.
+ return [ parse_range(r.strip()) for r in rangeset.split(',') ]
+ except ValueError:
+ return None
+
def renderHTTP(self, ctx):
req = IRequest(ctx)
gte = static.getTypeAndEncoding
if encoding:
req.setHeader("content-encoding", encoding)
- save_to_filename = None
if boolean_of_arg(get_arg(req, "save", "False")):
# tell the browser to save the file rather display it we don't
# try to encode the filename, instead we echo back the exact same
filesize = self.filenode.get_size()
assert isinstance(filesize, (int,long)), filesize
- offset, size = 0, None
+ first, size = 0, None
contentsize = filesize
req.setHeader("accept-ranges", "bytes")
if not self.filenode.is_mutable():
# or maybe just use the URI for CHK and LIT.
rangeheader = req.getHeader('range')
if rangeheader:
- # adapted from nevow.static.File
- bytesrange = rangeheader.split('=')
- if bytesrange[0] != 'bytes':
- raise WebError("Syntactically invalid http range header!")
- start, end = bytesrange[1].split('-')
- if start:
- offset = int(start)
- if not end:
- # RFC 2616 says:
- #
- # "If the last-byte-pos value is absent, or if the value is
- # greater than or equal to the current length of the
- # entity-body, last-byte-pos is taken to be equal to one less
- # than the current length of the entity- body in bytes."
- end = filesize - 1
- size = int(end) - offset + 1
- req.setResponseCode(http.PARTIAL_CONTENT)
- req.setHeader('content-range',"bytes %s-%s/%s" %
- (str(offset), str(offset+size-1), str(filesize)))
- contentsize = size
+ ranges = self.parse_range_header(rangeheader)
+
+ # ranges = None means the header didn't parse, so ignore
+ # the header as if it didn't exist. If is more than one
+ # range, then just return the first for now, until we can
+ # generate multipart/byteranges.
+ if ranges is not None:
+ first, last = ranges[0]
+
+ if first >= filesize:
+ raise WebError('First beyond end of file',
+ http.REQUESTED_RANGE_NOT_SATISFIABLE)
+ else:
+ first = max(0, first)
+ last = min(filesize-1, last)
+
+ req.setResponseCode(http.PARTIAL_CONTENT)
+ req.setHeader('content-range',"bytes %s-%s/%s" %
+ (str(first), str(last),
+ str(filesize)))
+ contentsize = last - first + 1
+ size = contentsize
+
req.setHeader("content-length", str(contentsize))
if req.method == "HEAD":
return ""
- d = self.filenode.read(req, offset, size)
+
+ # Twisted >=9.0 throws an error if we call req.finish() on a closed
+ # HTTP connection. It also has req.notifyFinish() to help avoid it.
+ finished = []
+ def _request_finished(ign):
+ finished.append(True)
+ if hasattr(req, "notifyFinish"):
+ req.notifyFinish().addBoth(_request_finished)
+
+ d = self.filenode.read(req, first, size)
+
+ def _finished(ign):
+ if not finished:
+ req.finish()
def _error(f):
+ lp = log.msg("error during GET", facility="tahoe.webish", failure=f,
+ level=log.UNUSUAL, umid="xSiF3w")
+ if finished:
+ log.msg("but it's too late to tell them", parent=lp,
+ level=log.UNUSUAL, umid="j1xIbw")
+ return
+ req._tahoe_request_had_error = f # for HTTP-style logging
if req.startedWriting:
# The content-type is already set, and the response code has
# already been sent, so we can't provide a clean error
# sensible error message.
eh = MyExceptionHandler()
eh.renderHTTP_exception(ctx, f)
- d.addCallbacks(lambda ign: req.finish(), _error)
+ d.addCallbacks(_finished, _error)
return req.deferred
def FileJSONMetadata(ctx, filenode, edge_metadata):
- if filenode.is_readonly():
- rw_uri = None
- ro_uri = filenode.get_uri()
- else:
- rw_uri = filenode.get_uri()
- ro_uri = filenode.get_readonly_uri()
+ rw_uri = filenode.get_write_uri()
+ ro_uri = filenode.get_readonly_uri()
data = ("filenode", {})
data[1]['size'] = filenode.get_size()
if ro_uri:
data[1]['mutable'] = filenode.is_mutable()
if edge_metadata is not None:
data[1]['metadata'] = edge_metadata
+
+ if filenode.is_mutable() and filenode.get_version() is not None:
+ mutable_type = filenode.get_version()
+ assert mutable_type in (MDMF_VERSION, SDMF_VERSION)
+ if mutable_type == MDMF_VERSION:
+ mutable_type = "mdmf"
+ else:
+ mutable_type = "sdmf"
+ data[1]['mutable-type'] = mutable_type
+
return text_plain(simplejson.dumps(data, indent=1) + "\n", ctx)
def FileURI(ctx, filenode):
projects / tahoe-lafs / tahoe-lafs.git / blobdiff