261e3b3099
if an uploaded file is detected as an image, 2 thumbnails (small and medium size) are generated automatically.
185 lines
8.2 KiB
Python
Executable file
185 lines
8.2 KiB
Python
Executable file
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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# SAT plugin for parrot mode (experimental)
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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 import exceptions
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from sat.core.log import getLogger
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log = getLogger(__name__)
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from sat.tools.common import regex
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from sat.tools import stream
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from twisted.internet import defer
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import os
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import os.path
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import mimetypes
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PLUGIN_INFO = {
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C.PI_NAME: "File sharing component",
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C.PI_IMPORT_NAME: "file_sharing",
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C.PI_MODES: [C.PLUG_MODE_COMPONENT],
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C.PI_TYPE: C.PLUG_TYPE_ENTRY_POINT,
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C.PI_PROTOCOLS: [],
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C.PI_DEPENDENCIES: ["FILE", "XEP-0234", "XEP-0260", "XEP-0261", "XEP-0264", "XEP-0329"],
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C.PI_RECOMMENDATIONS: [],
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C.PI_MAIN: "FileSharing",
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C.PI_HANDLER: "no",
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C.PI_DESCRIPTION: _(u"""Component hosting and sharing files""")
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}
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HASH_ALGO = u'sha-256'
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class FileSharing(object):
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def __init__(self, host):
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log.info(_(u"File Sharing initialization"))
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self.host = host
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self._f = host.plugins['FILE']
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self._jf = host.plugins['XEP-0234']
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self._h = host.plugins['XEP-0300']
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self._t = host.plugins['XEP-0264']
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host.trigger.add("FILE_getDestDir", self._getDestDirTrigger)
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host.trigger.add("XEP-0234_fileSendingRequest", self._fileSendingRequestTrigger, priority=1000)
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self.files_path = host.getLocalPath(None, C.FILES_DIR, profile=False)
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def profileConnected(self, client):
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path = client.file_tmp_dir = os.path.join(
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self.host.memory.getConfig('', 'local_dir'),
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C.FILES_TMP_DIR,
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regex.pathEscape(client.profile))
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if not os.path.exists(path):
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os.makedirs(path)
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@defer.inlineCallbacks
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def _fileTransferedCb(self, dummy, client, peer_jid, file_data, file_path):
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name = file_data[u'name']
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extra = {}
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if file_data[u'hash_algo'] == HASH_ALGO:
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log.debug(_(u"Reusing already generated hash"))
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file_hash = file_data[u'hash_hasher'].hexdigest()
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else:
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hasher = self._h.getHasher(HASH_ALGO)
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with open('file_path') as f:
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file_hash = yield self._h.calculateHash(f, hasher)
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final_path = os.path.join(self.files_path, file_hash)
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if os.path.isfile(final_path):
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log.debug(u"file [{file_hash}] already exists, we can remove temporary one".format(file_hash = file_hash))
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os.unlink(file_path)
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else:
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os.rename(file_path, final_path)
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log.debug(u"file [{file_hash}] moved to {files_path}".format(file_hash=file_hash, files_path=self.files_path))
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mime_type = file_data.get(u'mime_type')
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if not mime_type or mime_type == u'application/octet-stream':
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mime_type = mimetypes.guess_type(name)[0]
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if mime_type is not None and mime_type.startswith(u'image'):
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thumbnails = extra.setdefault(C.KEY_THUMBNAILS, [])
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for max_thumb_size in (self._t.SIZE_SMALL, self._t.SIZE_MEDIUM):
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try:
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thumb_size, thumb_id = yield self._t.generateThumbnail(final_path,
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max_thumb_size,
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# we keep thumbnails for 6 months
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60*60*24*31*6)
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except Exception as e:
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log.warning(_(u"Can't create thumbnail: {reason}").format(reason=e))
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break
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thumbnails.append({u'id': thumb_id, u'size': thumb_size})
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self.host.memory.setFile(client,
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name=name,
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version=u'',
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file_hash=file_hash,
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hash_algo=HASH_ALGO,
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size=file_data[u'size'],
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path=file_data.get(u'path'),
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namespace=file_data.get(u'namespace'),
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mime_type=mime_type,
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owner=peer_jid,
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extra=extra)
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def _getDestDirTrigger(self, client, peer_jid, transfer_data, file_data, stream_object):
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if not client.is_component:
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return True, None
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assert stream_object
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assert 'stream_object' not in transfer_data
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assert C.KEY_PROGRESS_ID in file_data
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filename = file_data['name']
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assert filename and not '/' in filename
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file_tmp_dir = self.host.getLocalPath(client, C.FILES_TMP_DIR, peer_jid.userhost(), component=True, profile=False)
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file_tmp_path = file_data['file_path'] = os.path.join(file_tmp_dir, file_data['name'])
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transfer_data['finished_d'].addCallback(self._fileTransferedCb, client, peer_jid, file_data, file_tmp_path)
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self._f.openFileWrite(client, file_tmp_path, transfer_data, file_data, stream_object)
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return False, defer.succeed(True)
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@defer.inlineCallbacks
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def _retrieveFiles(self, client, session, content_data, content_name, file_data, file_elt):
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peer_jid = session[u'peer_jid']
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try:
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found_files = yield self.host.memory.getFiles(client,
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peer_jid=peer_jid,
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name=file_data.get(u'name'),
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file_hash=file_data.get(u'hash'),
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hash_algo=file_data.get(u'hash_algo'),
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path=file_data.get(u'path'),
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namespace=file_data.get(u'namespace'))
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except exceptions.NotFound:
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found_files = None
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except exceptions.PermissionError:
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log.warning(_(u"{peer_jid} is trying to access an unauthorized file: {name}").format(
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peer_jid=peer_jid, name=file_data.get(u'name')))
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defer.returnValue(False)
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if not found_files:
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log.warning(_(u"no matching file found ({file_data})").format(file_data=file_data))
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defer.returnValue(False)
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# we only use the first found file
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found_file = found_files[0]
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file_hash = found_file[u'hash']
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file_path = os.path.join(self.files_path, file_hash)
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file_data[u'hash_hasher'] = hasher = self._h.getHasher(found_file[u'hash_algo'])
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size = file_data[u'size'] = found_file[u'size']
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file_data[u'file_hash'] = file_hash
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file_data[u'hash_algo'] = found_file[u'hash_algo']
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# we complete file_elt so peer can have some details on the file
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if u'name' not in file_data:
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file_elt.addElement(u'name', content=found_file[u'name'])
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file_elt.addElement(u'size', content=unicode(size))
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content_data['stream_object'] = stream.FileStreamObject(
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self.host,
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client,
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file_path,
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uid=self._jf.getProgressId(session, content_name),
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size=size,
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data_cb=lambda data: hasher.update(data),
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)
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defer.returnValue(True)
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def _fileSendingRequestTrigger(self, client, session, content_data, content_name, file_data, file_elt):
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if not client.is_component:
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return True, None
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else:
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return False, self._retrieveFiles(client, session, content_data, content_name, file_data, file_elt)
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