801 lines
31 KiB
Python
801 lines
31 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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# SAT plugin for Jingle File Transfer (XEP-0234)
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# Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from sat.core.i18n import _
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from sat.core.constants import Const as C
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from sat.core.log import getLogger
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log = getLogger(__name__)
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from sat.core import exceptions
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from wokkel import disco, iwokkel
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from zope.interface import implements
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from sat.tools import utils
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from sat.tools import stream
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from sat.tools.common import date_utils
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import os.path
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from twisted.words.xish import domish
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from twisted.words.protocols.jabber import jid
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from twisted.python import failure
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from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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from twisted.internet import defer
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from twisted.internet import reactor
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from twisted.internet import error as internet_error
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from collections import namedtuple
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from sat.tools.common import regex
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import mimetypes
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NS_JINGLE_FT = "urn:xmpp:jingle:apps:file-transfer:5"
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PLUGIN_INFO = {
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C.PI_NAME: "Jingle File Transfer",
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C.PI_IMPORT_NAME: "XEP-0234",
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C.PI_TYPE: "XEP",
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C.PI_MODES: C.PLUG_MODE_BOTH,
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C.PI_PROTOCOLS: ["XEP-0234"],
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C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0300", "FILE"],
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C.PI_MAIN: "XEP_0234",
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C.PI_HANDLER: "yes",
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C.PI_DESCRIPTION: _("""Implementation of Jingle File Transfer"""),
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}
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EXTRA_ALLOWED = {u"path", u"namespace", u"file_desc", u"file_hash"}
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Range = namedtuple("Range", ("offset", "length"))
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class XEP_0234(object):
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# TODO: assure everything is closed when file is sent or session terminate is received
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# TODO: call self._f.unregister when unloading order will be managing (i.e. when dependencies will be unloaded at the end)
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Range = Range # we copy the class here, so it can be used by other plugins
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def __init__(self, host):
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log.info(_("plugin Jingle File Transfer initialization"))
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self.host = host
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host.registerNamespace("jingle-ft", NS_JINGLE_FT)
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self._j = host.plugins["XEP-0166"] # shortcut to access jingle
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self._j.registerApplication(NS_JINGLE_FT, self)
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self._f = host.plugins["FILE"]
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self._f.register(
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NS_JINGLE_FT, self.fileJingleSend, priority=10000, method_name=u"Jingle"
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)
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self._hash = self.host.plugins["XEP-0300"]
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host.bridge.addMethod(
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"fileJingleSend",
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".plugin",
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in_sign="ssssa{ss}s",
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out_sign="",
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method=self._fileJingleSend,
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async=True,
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)
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host.bridge.addMethod(
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"fileJingleRequest",
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".plugin",
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in_sign="sssssa{ss}s",
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out_sign="s",
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method=self._fileJingleRequest,
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async=True,
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)
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def getHandler(self, client):
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return XEP_0234_handler()
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def getProgressId(self, session, content_name):
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"""Return a unique progress ID
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@param session(dict): jingle session
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@param content_name(unicode): name of the content
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@return (unicode): unique progress id
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"""
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return u"{}_{}".format(session["id"], content_name)
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# generic methods
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def buildFileElement(
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self,
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name,
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file_hash=None,
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hash_algo=None,
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size=None,
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mime_type=None,
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desc=None,
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modified=None,
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transfer_range=None,
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path=None,
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namespace=None,
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file_elt=None,
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**kwargs
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):
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"""Generate a <file> element with available metadata
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@param file_hash(unicode, None): hash of the file
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empty string to set <hash-used/> element
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@param hash_algo(unicode, None): hash algorithm used
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if file_hash is None and hash_algo is set, a <hash-used/> element will be generated
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@param transfer_range(Range, None): where transfer must start/stop
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@param modified(int, unicode, None): date of last modification
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0 to use current date
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int to use an unix timestamp
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else must be an unicode string which will be used as it (it must be an XMPP time)
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@param file_elt(domish.Element, None): element to use
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None to create a new one
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@param **kwargs: data for plugin extension (ignored by default)
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@return (domish.Element): generated element
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@trigger XEP-0234_buildFileElement(file_elt, extra_args): can be used to extend elements to add
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"""
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if file_elt is None:
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file_elt = domish.Element((NS_JINGLE_FT, u"file"))
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for name, value in (
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(u"name", name),
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(u"size", size),
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("media-type", mime_type),
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(u"desc", desc),
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(u"path", path),
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(u"namespace", namespace),
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):
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if value is not None:
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file_elt.addElement(name, content=unicode(value))
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if modified is not None:
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if isinstance(modified, int):
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file_elt.addElement(u"date", utils.xmpp_date(modified or None))
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else:
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file_elt.addElement(u"date", modified)
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elif "created" in kwargs:
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file_elt.addElement(u"date", utils.xmpp_date(kwargs.pop("created")))
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range_elt = file_elt.addElement(u"range")
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if transfer_range is not None:
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if transfer_range.offset is not None:
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range_elt[u"offset"] = transfer_range.offset
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if transfer_range.length is not None:
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range_elt[u"length"] = transfer_range.length
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if file_hash is not None:
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if not file_hash:
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file_elt.addChild(self._hash.buildHashUsedElt())
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else:
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file_elt.addChild(self._hash.buildHashElt(file_hash, hash_algo))
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elif hash_algo is not None:
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file_elt.addChild(self._hash.buildHashUsedElt(hash_algo))
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self.host.trigger.point(u"XEP-0234_buildFileElement", file_elt, extra_args=kwargs)
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if kwargs:
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for kw in kwargs:
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log.debug("ignored keyword: {}".format(kw))
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return file_elt
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def buildFileElementFromDict(self, file_data, **kwargs):
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"""like buildFileElement but get values from a file_data dict
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@param file_data(dict): metadata to use
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@param **kwargs: data to override
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"""
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if kwargs:
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file_data = file_data.copy()
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file_data.update(kwargs)
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return self.buildFileElement(**file_data)
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def parseFileElement(
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self,
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file_elt,
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file_data=None,
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given=False,
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parent_elt=None,
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keep_empty_range=False,
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):
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"""Parse a <file> element and file dictionary accordingly
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@param file_data(dict, None): dict where the data will be set
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following keys will be set (and overwritten if they already exist):
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name, file_hash, hash_algo, size, mime_type, desc, path, namespace, range
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if None, a new dict is created
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@param given(bool): if True, prefix hash key with "given_"
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@param parent_elt(domish.Element, None): parent of the file element
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if set, file_elt must not be set
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@param keep_empty_range(bool): if True, keep empty range (i.e. range when offset and length are None)
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empty range are useful to know if a peer_jid can handle range
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@return (dict): file_data
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@trigger XEP-0234_parseFileElement(file_elt, file_data): can be used to parse new elements
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@raise exceptions.NotFound: there is not <file> element in parent_elt
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@raise exceptions.DataError: if file_elt uri is not NS_JINGLE_FT
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"""
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if parent_elt is not None:
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if file_elt is not None:
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raise exceptions.InternalError(
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u"file_elt must be None if parent_elt is set"
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)
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try:
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file_elt = next(parent_elt.elements(NS_JINGLE_FT, u"file"))
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except StopIteration:
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raise exceptions.NotFound()
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else:
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if not file_elt or file_elt.uri != NS_JINGLE_FT:
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raise exceptions.DataError(
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u"invalid <file> element: {stanza}".format(stanza=file_elt.toXml())
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)
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if file_data is None:
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file_data = {}
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for name in (u"name", u"desc", u"path", u"namespace"):
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try:
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file_data[name] = unicode(next(file_elt.elements(NS_JINGLE_FT, name)))
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except StopIteration:
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pass
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name = file_data.get(u"name")
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if name == u"..":
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# we don't want to go to parent dir when joining to a path
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name = u"--"
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file_data[u"name"] = name
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elif name is not None and u"/" in name or u"\\" in name:
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file_data[u"name"] = regex.pathEscape(name)
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try:
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file_data[u"mime_type"] = unicode(
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next(file_elt.elements(NS_JINGLE_FT, u"media-type"))
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)
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except StopIteration:
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pass
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try:
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file_data[u"size"] = int(
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unicode(next(file_elt.elements(NS_JINGLE_FT, u"size")))
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)
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except StopIteration:
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pass
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try:
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file_data[u"modified"] = date_utils.date_parse(
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next(file_elt.elements(NS_JINGLE_FT, u"date"))
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)
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except StopIteration:
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pass
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try:
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range_elt = file_elt.elements(NS_JINGLE_FT, u"range").next()
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except StopIteration:
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pass
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else:
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offset = range_elt.getAttribute("offset")
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length = range_elt.getAttribute("length")
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if offset or length or keep_empty_range:
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file_data[u"transfer_range"] = Range(offset=offset, length=length)
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prefix = u"given_" if given else u""
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hash_algo_key, hash_key = u"hash_algo", prefix + u"file_hash"
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try:
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file_data[hash_algo_key], file_data[hash_key] = self._hash.parseHashElt(
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file_elt
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)
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except exceptions.NotFound:
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pass
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self.host.trigger.point(u"XEP-0234_parseFileElement", file_elt, file_data)
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return file_data
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# bridge methods
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def _fileJingleSend(
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self,
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peer_jid,
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filepath,
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name="",
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file_desc="",
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extra=None,
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profile=C.PROF_KEY_NONE,
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):
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client = self.host.getClient(profile)
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return self.fileJingleSend(
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client,
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jid.JID(peer_jid),
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filepath,
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name or None,
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file_desc or None,
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extra or None,
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)
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@defer.inlineCallbacks
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def fileJingleSend(
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self, client, peer_jid, filepath, name, file_desc=None, extra=None
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):
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"""Send a file using jingle file transfer
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@param peer_jid(jid.JID): destinee jid
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@param filepath(str): absolute path of the file
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@param name(unicode, None): name of the file
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@param file_desc(unicode, None): description of the file
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@return (D(unicode)): progress id
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"""
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progress_id_d = defer.Deferred()
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if extra is None:
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extra = {}
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if file_desc is not None:
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extra["file_desc"] = file_desc
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yield self._j.initiate(
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client,
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peer_jid,
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[
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{
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"app_ns": NS_JINGLE_FT,
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"senders": self._j.ROLE_INITIATOR,
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"app_kwargs": {
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"filepath": filepath,
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"name": name,
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"extra": extra,
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"progress_id_d": progress_id_d,
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},
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}
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],
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)
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progress_id = yield progress_id_d
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defer.returnValue(progress_id)
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def _fileJingleRequest(
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self,
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peer_jid,
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filepath,
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name="",
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file_hash="",
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hash_algo="",
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extra=None,
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profile=C.PROF_KEY_NONE,
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):
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client = self.host.getClient(profile)
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return self.fileJingleRequest(
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client,
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jid.JID(peer_jid),
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filepath,
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name or None,
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file_hash or None,
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hash_algo or None,
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extra or None,
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)
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@defer.inlineCallbacks
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def fileJingleRequest(
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self,
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client,
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peer_jid,
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filepath,
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name=None,
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file_hash=None,
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hash_algo=None,
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extra=None,
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):
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"""Request a file using jingle file transfer
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@param peer_jid(jid.JID): destinee jid
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@param filepath(str): absolute path where the file will be downloaded
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@param name(unicode, None): name of the file
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@param file_hash(unicode, None): hash of the file
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@return (D(unicode)): progress id
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"""
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progress_id_d = defer.Deferred()
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if extra is None:
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extra = {}
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if file_hash is not None:
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if hash_algo is None:
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raise ValueError(_(u"hash_algo must be set if file_hash is set"))
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extra["file_hash"] = file_hash
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extra["hash_algo"] = hash_algo
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else:
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if hash_algo is not None:
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raise ValueError(_(u"file_hash must be set if hash_algo is set"))
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yield self._j.initiate(
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client,
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peer_jid,
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[
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{
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"app_ns": NS_JINGLE_FT,
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"senders": self._j.ROLE_RESPONDER,
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"app_kwargs": {
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"filepath": filepath,
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"name": name,
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"extra": extra,
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"progress_id_d": progress_id_d,
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},
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}
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],
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)
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progress_id = yield progress_id_d
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defer.returnValue(progress_id)
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# jingle callbacks
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def jingleSessionInit(
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self, client, session, content_name, filepath, name, extra, progress_id_d
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):
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if extra is None:
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extra = {}
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else:
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if not EXTRA_ALLOWED.issuperset(extra):
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raise ValueError(
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_(u"only the following keys are allowed in extra: {keys}").format(
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keys=u", ".join(EXTRA_ALLOWED)
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)
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)
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progress_id_d.callback(self.getProgressId(session, content_name))
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content_data = session["contents"][content_name]
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application_data = content_data["application_data"]
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assert "file_path" not in application_data
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application_data["file_path"] = filepath
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file_data = application_data["file_data"] = {}
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desc_elt = domish.Element((NS_JINGLE_FT, "description"))
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file_elt = desc_elt.addElement("file")
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if content_data[u"senders"] == self._j.ROLE_INITIATOR:
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# we send a file
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if name is None:
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name = os.path.basename(filepath)
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file_data[u"date"] = utils.xmpp_date()
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file_data[u"desc"] = extra.pop(u"file_desc", u"")
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file_data[u"name"] = name
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mime_type = mimetypes.guess_type(name, strict=False)[0]
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if mime_type is not None:
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file_data[u"mime_type"] = mime_type
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file_data[u"size"] = os.path.getsize(filepath)
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if u"namespace" in extra:
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file_data[u"namespace"] = extra[u"namespace"]
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if u"path" in extra:
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file_data[u"path"] = extra[u"path"]
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self.buildFileElementFromDict(file_data, file_elt=file_elt, file_hash=u"")
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else:
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# we request a file
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file_hash = extra.pop(u"file_hash", u"")
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if not name and not file_hash:
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raise ValueError(_(u"you need to provide at least name or file hash"))
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if name:
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file_data[u"name"] = name
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if file_hash:
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file_data[u"file_hash"] = file_hash
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file_data[u"hash_algo"] = extra[u"hash_algo"]
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else:
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file_data[u"hash_algo"] = self._hash.getDefaultAlgo()
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if u"namespace" in extra:
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file_data[u"namespace"] = extra[u"namespace"]
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if u"path" in extra:
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file_data[u"path"] = extra[u"path"]
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self.buildFileElementFromDict(file_data, file_elt=file_elt)
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return desc_elt
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def jingleRequestConfirmation(self, client, action, session, content_name, desc_elt):
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"""This method request confirmation for a jingle session"""
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content_data = session["contents"][content_name]
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senders = content_data[u"senders"]
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if senders not in (self._j.ROLE_INITIATOR, self._j.ROLE_RESPONDER):
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log.warning(u"Bad sender, assuming initiator")
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senders = content_data[u"senders"] = self._j.ROLE_INITIATOR
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# first we grab file informations
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try:
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file_elt = desc_elt.elements(NS_JINGLE_FT, "file").next()
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except StopIteration:
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raise failure.Failure(exceptions.DataError)
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file_data = {"progress_id": self.getProgressId(session, content_name)}
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if senders == self._j.ROLE_RESPONDER:
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# we send the file
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return self._fileSendingRequestConf(
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client, session, content_data, content_name, file_data, file_elt
|
||
)
|
||
else:
|
||
# we receive the file
|
||
return self._fileReceivingRequestConf(
|
||
client, session, content_data, content_name, file_data, file_elt
|
||
)
|
||
|
||
@defer.inlineCallbacks
|
||
def _fileSendingRequestConf(
|
||
self, client, session, content_data, content_name, file_data, file_elt
|
||
):
|
||
"""parse file_elt, and handle file retrieving/permission checking"""
|
||
self.parseFileElement(file_elt, file_data)
|
||
content_data["application_data"]["file_data"] = file_data
|
||
finished_d = content_data["finished_d"] = defer.Deferred()
|
||
|
||
# confirmed_d is a deferred returning confimed value (only used if cont is False)
|
||
cont, confirmed_d = self.host.trigger.returnPoint(
|
||
"XEP-0234_fileSendingRequest",
|
||
client,
|
||
session,
|
||
content_data,
|
||
content_name,
|
||
file_data,
|
||
file_elt,
|
||
)
|
||
if not cont:
|
||
confirmed = yield confirmed_d
|
||
if confirmed:
|
||
args = [client, session, content_name, content_data]
|
||
finished_d.addCallbacks(
|
||
self._finishedCb, self._finishedEb, args, None, args
|
||
)
|
||
defer.returnValue(confirmed)
|
||
|
||
log.warning(_(u"File continue is not implemented yet"))
|
||
defer.returnValue(False)
|
||
|
||
def _fileReceivingRequestConf(
|
||
self, client, session, content_data, content_name, file_data, file_elt
|
||
):
|
||
"""parse file_elt, and handle user permission/file opening"""
|
||
self.parseFileElement(file_elt, file_data, given=True)
|
||
try:
|
||
hash_algo, file_data["given_file_hash"] = self._hash.parseHashElt(file_elt)
|
||
except exceptions.NotFound:
|
||
try:
|
||
hash_algo = self._hash.parseHashUsedElt(file_elt)
|
||
except exceptions.NotFound:
|
||
raise failure.Failure(exceptions.DataError)
|
||
|
||
if hash_algo is not None:
|
||
file_data["hash_algo"] = hash_algo
|
||
file_data["hash_hasher"] = hasher = self._hash.getHasher(hash_algo)
|
||
file_data["data_cb"] = lambda data: hasher.update(data)
|
||
|
||
try:
|
||
file_data["size"] = int(file_data["size"])
|
||
except ValueError:
|
||
raise failure.Failure(exceptions.DataError)
|
||
|
||
name = file_data["name"]
|
||
if "/" in name or "\\" in name:
|
||
log.warning(
|
||
u"File name contain path characters, we replace them: {}".format(name)
|
||
)
|
||
file_data["name"] = name.replace("/", "_").replace("\\", "_")
|
||
|
||
content_data["application_data"]["file_data"] = file_data
|
||
|
||
# now we actualy request permission to user
|
||
def gotConfirmation(confirmed):
|
||
if confirmed:
|
||
args = [client, session, content_name, content_data]
|
||
finished_d.addCallbacks(
|
||
self._finishedCb, self._finishedEb, args, None, args
|
||
)
|
||
return confirmed
|
||
|
||
# deferred to track end of transfer
|
||
finished_d = content_data["finished_d"] = defer.Deferred()
|
||
d = self._f.getDestDir(
|
||
client, session["peer_jid"], content_data, file_data, stream_object=True
|
||
)
|
||
d.addCallback(gotConfirmation)
|
||
return d
|
||
|
||
def jingleHandler(self, client, action, session, content_name, desc_elt):
|
||
content_data = session["contents"][content_name]
|
||
application_data = content_data["application_data"]
|
||
if action in (self._j.A_ACCEPTED_ACK,):
|
||
pass
|
||
elif action == self._j.A_SESSION_INITIATE:
|
||
file_elt = desc_elt.elements(NS_JINGLE_FT, "file").next()
|
||
try:
|
||
file_elt.elements(NS_JINGLE_FT, "range").next()
|
||
except StopIteration:
|
||
# initiator doesn't manage <range>, but we do so we advertise it
|
||
# FIXME: to be checked
|
||
log.debug("adding <range> element")
|
||
file_elt.addElement("range")
|
||
elif action == self._j.A_SESSION_ACCEPT:
|
||
assert not "stream_object" in content_data
|
||
file_data = application_data["file_data"]
|
||
file_path = application_data["file_path"]
|
||
senders = content_data[u"senders"]
|
||
if senders != session[u"role"]:
|
||
# we are receiving the file
|
||
try:
|
||
# did the responder specified the size of the file?
|
||
file_elt = next(desc_elt.elements(NS_JINGLE_FT, u"file"))
|
||
size_elt = next(file_elt.elements(NS_JINGLE_FT, u"size"))
|
||
size = int(unicode(size_elt))
|
||
except (StopIteration, ValueError):
|
||
size = None
|
||
# XXX: hash security is not critical here, so we just take the higher mandatory one
|
||
hasher = file_data["hash_hasher"] = self._hash.getHasher()
|
||
content_data["stream_object"] = stream.FileStreamObject(
|
||
self.host,
|
||
client,
|
||
file_path,
|
||
mode="wb",
|
||
uid=self.getProgressId(session, content_name),
|
||
size=size,
|
||
data_cb=lambda data: hasher.update(data),
|
||
)
|
||
else:
|
||
# we are sending the file
|
||
size = file_data["size"]
|
||
# XXX: hash security is not critical here, so we just take the higher mandatory one
|
||
hasher = file_data["hash_hasher"] = self._hash.getHasher()
|
||
content_data["stream_object"] = stream.FileStreamObject(
|
||
self.host,
|
||
client,
|
||
file_path,
|
||
uid=self.getProgressId(session, content_name),
|
||
size=size,
|
||
data_cb=lambda data: hasher.update(data),
|
||
)
|
||
finished_d = content_data["finished_d"] = defer.Deferred()
|
||
args = [client, session, content_name, content_data]
|
||
finished_d.addCallbacks(self._finishedCb, self._finishedEb, args, None, args)
|
||
else:
|
||
log.warning(u"FIXME: unmanaged action {}".format(action))
|
||
return desc_elt
|
||
|
||
def jingleSessionInfo(self, client, action, session, content_name, jingle_elt):
|
||
"""Called on session-info action
|
||
|
||
manage checksum, and ignore <received/> element
|
||
"""
|
||
# TODO: manage <received/> element
|
||
content_data = session["contents"][content_name]
|
||
elts = [elt for elt in jingle_elt.elements() if elt.uri == NS_JINGLE_FT]
|
||
if not elts:
|
||
return
|
||
for elt in elts:
|
||
if elt.name == "received":
|
||
pass
|
||
elif elt.name == "checksum":
|
||
# we have received the file hash, we need to parse it
|
||
if content_data["senders"] == session["role"]:
|
||
log.warning(
|
||
u"unexpected checksum received while we are the file sender"
|
||
)
|
||
raise exceptions.DataError
|
||
info_content_name = elt["name"]
|
||
if info_content_name != content_name:
|
||
# it was for an other content...
|
||
return
|
||
file_data = content_data["application_data"]["file_data"]
|
||
try:
|
||
file_elt = elt.elements((NS_JINGLE_FT, "file")).next()
|
||
except StopIteration:
|
||
raise exceptions.DataError
|
||
algo, file_data["given_file_hash"] = self._hash.parseHashElt(file_elt)
|
||
if algo != file_data.get("hash_algo"):
|
||
log.warning(
|
||
u"Hash algorithm used in given hash ({peer_algo}) doesn't correspond to the one we have used ({our_algo}) [{profile}]".format(
|
||
peer_algo=algo,
|
||
our_algo=file_data.get("hash_algo"),
|
||
profile=client.profile,
|
||
)
|
||
)
|
||
else:
|
||
self._receiverTryTerminate(
|
||
client, session, content_name, content_data
|
||
)
|
||
else:
|
||
raise NotImplementedError
|
||
|
||
def jingleTerminate(self, client, action, session, content_name, jingle_elt):
|
||
if jingle_elt.decline:
|
||
# progress is the only way to tell to frontends that session has been declined
|
||
progress_id = self.getProgressId(session, content_name)
|
||
self.host.bridge.progressError(
|
||
progress_id, C.PROGRESS_ERROR_DECLINED, client.profile
|
||
)
|
||
|
||
def _sendCheckSum(self, client, session, content_name, content_data):
|
||
"""Send the session-info with the hash checksum"""
|
||
file_data = content_data["application_data"]["file_data"]
|
||
hasher = file_data["hash_hasher"]
|
||
hash_ = hasher.hexdigest()
|
||
log.debug(u"Calculated hash: {}".format(hash_))
|
||
iq_elt, jingle_elt = self._j.buildSessionInfo(client, session)
|
||
checksum_elt = jingle_elt.addElement((NS_JINGLE_FT, "checksum"))
|
||
checksum_elt["creator"] = content_data["creator"]
|
||
checksum_elt["name"] = content_name
|
||
file_elt = checksum_elt.addElement("file")
|
||
file_elt.addChild(self._hash.buildHashElt(hash_))
|
||
iq_elt.send()
|
||
|
||
def _receiverTryTerminate(
|
||
self, client, session, content_name, content_data, last_try=False
|
||
):
|
||
"""Try to terminate the session
|
||
|
||
This method must only be used by the receiver.
|
||
It check if transfer is finished, and hash available,
|
||
if everything is OK, it check hash and terminate the session
|
||
@param last_try(bool): if True this mean than session must be terminated even given hash is not available
|
||
@return (bool): True if session was terminated
|
||
"""
|
||
if not content_data.get("transfer_finished", False):
|
||
return False
|
||
file_data = content_data["application_data"]["file_data"]
|
||
given_hash = file_data.get("given_file_hash")
|
||
if given_hash is None:
|
||
if last_try:
|
||
log.warning(
|
||
u"sender didn't sent hash checksum, we can't check the file [{profile}]".format(
|
||
profile=client.profile
|
||
)
|
||
)
|
||
self._j.delayedContentTerminate(client, session, content_name)
|
||
content_data["stream_object"].close()
|
||
return True
|
||
return False
|
||
hasher = file_data["hash_hasher"]
|
||
hash_ = hasher.hexdigest()
|
||
|
||
if hash_ == given_hash:
|
||
log.info(u"Hash checked, file was successfully transfered: {}".format(hash_))
|
||
progress_metadata = {
|
||
"hash": hash_,
|
||
"hash_algo": file_data["hash_algo"],
|
||
"hash_verified": C.BOOL_TRUE,
|
||
}
|
||
error = None
|
||
else:
|
||
log.warning(u"Hash mismatch, the file was not transfered correctly")
|
||
progress_metadata = None
|
||
error = u"Hash mismatch: given={algo}:{given}, calculated={algo}:{our}".format(
|
||
algo=file_data["hash_algo"], given=given_hash, our=hash_
|
||
)
|
||
|
||
self._j.delayedContentTerminate(client, session, content_name)
|
||
content_data["stream_object"].close(progress_metadata, error)
|
||
# we may have the last_try timer still active, so we try to cancel it
|
||
try:
|
||
content_data["last_try_timer"].cancel()
|
||
except (KeyError, internet_error.AlreadyCalled):
|
||
pass
|
||
return True
|
||
|
||
def _finishedCb(self, __, client, session, content_name, content_data):
|
||
log.info(u"File transfer terminated")
|
||
if content_data["senders"] != session["role"]:
|
||
# we terminate the session only if we are the receiver,
|
||
# as recommanded in XEP-0234 §2 (after example 6)
|
||
content_data["transfer_finished"] = True
|
||
if not self._receiverTryTerminate(
|
||
client, session, content_name, content_data
|
||
):
|
||
# we have not received the hash yet, we wait 5 more seconds
|
||
content_data["last_try_timer"] = reactor.callLater(
|
||
5,
|
||
self._receiverTryTerminate,
|
||
client,
|
||
session,
|
||
content_name,
|
||
content_data,
|
||
last_try=True,
|
||
)
|
||
else:
|
||
# we are the sender, we send the checksum
|
||
self._sendCheckSum(client, session, content_name, content_data)
|
||
content_data["stream_object"].close()
|
||
|
||
def _finishedEb(self, failure, client, session, content_name, content_data):
|
||
log.warning(u"Error while streaming file: {}".format(failure))
|
||
content_data["stream_object"].close()
|
||
self._j.contentTerminate(
|
||
client, session, content_name, reason=self._j.REASON_FAILED_TRANSPORT
|
||
)
|
||
|
||
|
||
class XEP_0234_handler(XMPPHandler):
|
||
implements(iwokkel.IDisco)
|
||
|
||
def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
|
||
return [disco.DiscoFeature(NS_JINGLE_FT)]
|
||
|
||
def getDiscoItems(self, requestor, target, nodeIdentifier=""):
|
||
return []
|