Mercurial > libervia-backend
view sat/plugins/plugin_comp_file_sharing.py @ 2571:4aca060075b7
setup: version is now set in SAT/VERSION, sat is not imported anymore in setup
author | Goffi <goffi@goffi.org> |
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date | Thu, 05 Apr 2018 10:41:08 +0200 |
parents | 26edcf3a30eb |
children | 56f94936df1e |
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#!/usr/bin/env python2 # -*- coding: utf-8 -*- # SAT plugin for parrot mode (experimental) # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from sat.core.i18n import _ from sat.core.constants import Const as C from sat.core import exceptions from sat.core.log import getLogger log = getLogger(__name__) from sat.tools.common import regex from sat.tools.common import uri from sat.tools import stream from twisted.internet import defer from twisted.words.protocols.jabber import error from wokkel import pubsub from wokkel import generic from functools import partial import os import os.path import mimetypes PLUGIN_INFO = { C.PI_NAME: "File sharing component", C.PI_IMPORT_NAME: "file_sharing", C.PI_MODES: [C.PLUG_MODE_COMPONENT], C.PI_TYPE: C.PLUG_TYPE_ENTRY_POINT, C.PI_PROTOCOLS: [], C.PI_DEPENDENCIES: ["FILE", "XEP-0231", "XEP-0234", "XEP-0260", "XEP-0261", "XEP-0264", "XEP-0329"], C.PI_RECOMMENDATIONS: [], C.PI_MAIN: "FileSharing", C.PI_HANDLER: C.BOOL_TRUE, C.PI_DESCRIPTION: _(u"""Component hosting and sharing files""") } HASH_ALGO = u'sha-256' NS_COMMENTS = 'org.salut-a-toi.comments' COMMENT_NODE_PREFIX = 'org.salut-a-toi.file_comments/' class FileSharing(object): def __init__(self, host): log.info(_(u"File Sharing initialization")) self.host = host self._f = host.plugins['FILE'] self._jf = host.plugins['XEP-0234'] self._h = host.plugins['XEP-0300'] self._t = host.plugins['XEP-0264'] host.trigger.add("FILE_getDestDir", self._getDestDirTrigger) host.trigger.add("XEP-0234_fileSendingRequest", self._fileSendingRequestTrigger, priority=1000) host.trigger.add("XEP-0234_buildFileElement", self._addFileComments) host.trigger.add("XEP-0234_parseFileElement", self._getFileComments) host.trigger.add("XEP-0329_compGetFilesFromNode", self._addCommentsData) self.files_path = host.getLocalPath(None, C.FILES_DIR, profile=False) def getHandler(self, client): return Comments_handler(self) def profileConnected(self, client): path = client.file_tmp_dir = os.path.join( self.host.memory.getConfig('', 'local_dir'), C.FILES_TMP_DIR, regex.pathEscape(client.profile)) if not os.path.exists(path): os.makedirs(path) @defer.inlineCallbacks def _fileTransferedCb(self, dummy, client, peer_jid, file_data, file_path): """post file reception tasks on file is received, this method create hash/thumbnails if necessary move the file to the right location, and create metadata entry in database """ name = file_data[u'name'] extra = {} if file_data[u'hash_algo'] == HASH_ALGO: log.debug(_(u"Reusing already generated hash")) file_hash = file_data[u'hash_hasher'].hexdigest() else: hasher = self._h.getHasher(HASH_ALGO) with open('file_path') as f: file_hash = yield self._h.calculateHash(f, hasher) final_path = os.path.join(self.files_path, file_hash) if os.path.isfile(final_path): log.debug(u"file [{file_hash}] already exists, we can remove temporary one".format(file_hash = file_hash)) os.unlink(file_path) else: os.rename(file_path, final_path) log.debug(u"file [{file_hash}] moved to {files_path}".format(file_hash=file_hash, files_path=self.files_path)) mime_type = file_data.get(u'mime_type') if not mime_type or mime_type == u'application/octet-stream': mime_type = mimetypes.guess_type(name)[0] if mime_type is not None and mime_type.startswith(u'image'): thumbnails = extra.setdefault(C.KEY_THUMBNAILS, []) for max_thumb_size in (self._t.SIZE_SMALL, self._t.SIZE_MEDIUM): try: thumb_size, thumb_id = yield self._t.generateThumbnail(final_path, max_thumb_size, # we keep thumbnails for 6 months 60*60*24*31*6) except Exception as e: log.warning(_(u"Can't create thumbnail: {reason}").format(reason=e)) break thumbnails.append({u'id': thumb_id, u'size': thumb_size}) self.host.memory.setFile(client, name=name, version=u'', file_hash=file_hash, hash_algo=HASH_ALGO, size=file_data[u'size'], path=file_data.get(u'path'), namespace=file_data.get(u'namespace'), mime_type=mime_type, owner=peer_jid, extra=extra) def _getDestDirTrigger(self, client, peer_jid, transfer_data, file_data, stream_object): """This trigger accept file sending request, and store file locally""" if not client.is_component: return True, None assert stream_object assert 'stream_object' not in transfer_data assert C.KEY_PROGRESS_ID in file_data filename = file_data['name'] assert filename and not '/' in filename file_tmp_dir = self.host.getLocalPath(client, C.FILES_TMP_DIR, peer_jid.userhost(), component=True, profile=False) file_tmp_path = file_data['file_path'] = os.path.join(file_tmp_dir, file_data['name']) transfer_data['finished_d'].addCallback(self._fileTransferedCb, client, peer_jid, file_data, file_tmp_path) self._f.openFileWrite(client, file_tmp_path, transfer_data, file_data, stream_object) return False, defer.succeed(True) @defer.inlineCallbacks def _retrieveFiles(self, client, session, content_data, content_name, file_data, file_elt): """This method retrieve a file on request, and send if after checking permissions""" peer_jid = session[u'peer_jid'] try: found_files = yield self.host.memory.getFiles(client, peer_jid=peer_jid, name=file_data.get(u'name'), file_hash=file_data.get(u'file_hash'), hash_algo=file_data.get(u'hash_algo'), path=file_data.get(u'path'), namespace=file_data.get(u'namespace')) except exceptions.NotFound: found_files = None except exceptions.PermissionError: log.warning(_(u"{peer_jid} is trying to access an unauthorized file: {name}").format( peer_jid=peer_jid, name=file_data.get(u'name'))) defer.returnValue(False) if not found_files: log.warning(_(u"no matching file found ({file_data})").format(file_data=file_data)) defer.returnValue(False) # we only use the first found file found_file = found_files[0] file_hash = found_file[u'file_hash'] file_path = os.path.join(self.files_path, file_hash) file_data[u'hash_hasher'] = hasher = self._h.getHasher(found_file[u'hash_algo']) size = file_data[u'size'] = found_file[u'size'] file_data[u'file_hash'] = file_hash file_data[u'hash_algo'] = found_file[u'hash_algo'] # we complete file_elt so peer can have some details on the file if u'name' not in file_data: file_elt.addElement(u'name', content=found_file[u'name']) file_elt.addElement(u'size', content=unicode(size)) content_data['stream_object'] = stream.FileStreamObject( self.host, client, file_path, uid=self._jf.getProgressId(session, content_name), size=size, data_cb=lambda data: hasher.update(data), ) defer.returnValue(True) def _fileSendingRequestTrigger(self, client, session, content_data, content_name, file_data, file_elt): if not client.is_component: return True, None else: return False, self._retrieveFiles(client, session, content_data, content_name, file_data, file_elt) ## comments triggers ## def _addFileComments(self, file_elt, extra_args): try: comments_url = extra_args.pop('comments_url') except KeyError: return comment_elt = file_elt.addElement((NS_COMMENTS, 'comments'), content=comments_url) try: count = len(extra_args[u'extra'][u'comments']) except KeyError: count = 0 comment_elt['count'] = unicode(count) return True def _getFileComments(self, file_elt, file_data): try: comments_elt = next(file_elt.elements(NS_COMMENTS, 'comments')) except StopIteration: return file_data['comments_url'] = unicode(comments_elt) file_data['comments_count'] = comments_elt['count'] return True def _addCommentsData(self, client, iq_elt, owner, node_path, files_data): for file_data in files_data: file_data['comments_url'] = uri.buildXMPPUri('pubsub', path=client.jid.full(), node=COMMENT_NODE_PREFIX + file_data['id']) return True class Comments_handler(pubsub.PubSubService): """This class is a minimal Pubsub service handling virtual nodes for comments""" def __init__(self, plugin_parent): super(Comments_handler, self).__init__() # PubsubVirtualResource()) self.host = plugin_parent.host self.plugin_parent = plugin_parent self.discoIdentity = {'category': 'pubsub', 'type': 'virtual', # FIXME: non standard, here to avoid this service being considered as main pubsub one 'name': 'files commenting service'} def _getFileId(self, nodeIdentifier): if not nodeIdentifier.startswith(COMMENT_NODE_PREFIX): raise error.StanzaError('item-not-found') file_id = nodeIdentifier[len(COMMENT_NODE_PREFIX):] if not file_id: raise error.StanzaError('item-not-found') return file_id @defer.inlineCallbacks def getFileData(self, requestor, nodeIdentifier): file_id = self._getFileId(nodeIdentifier) try: files = yield self.host.memory.getFiles(self.parent, requestor, file_id) except (exceptions.NotFound, exceptions.PermissionError): # we don't differenciate between NotFound and PermissionError # to avoid leaking information on existing files raise error.StanzaError('item-not-found') if not files: raise error.StanzaError('item-not-found') if len(files) > 1: raise error.InternalError('there should be only one file') defer.returnValue(files[0]) def commentsUpdate(self, extra, new_comments, peer_jid): """update comments (replace or insert new_comments) @param extra(dict): extra data to update @param new_comments(list[tuple(unicode, unicode, unicode)]): comments to update or insert @param peer_jid(unicode, None): bare jid of the requestor, or None if request is done by owner """ current_comments = extra.setdefault('comments', []) new_comments_by_id = {c[0]:c for c in new_comments} updated = [] # we now check every current comment, to see if one id in new ones # exist, in which case we must update for idx, comment in enumerate(current_comments): comment_id = comment[0] if comment_id in new_comments_by_id: # a new comment has an existing id, update is requested if peer_jid and comment[1] != peer_jid: # requestor has not the right to modify the comment raise exceptions.PermissionError # we replace old_comment with updated one new_comment = new_comments_by_id[comment_id] current_comments[idx] = new_comment updated.append(new_comment) # we now remove every updated comments, to only keep # the ones to insert for comment in updated: new_comments.remove(comment) current_comments.extend(new_comments) def commentsDelete(self, extra, comments): try: comments_dict = extra['comments'] except KeyError: return for comment in comments: try: comments_dict.remove(comment) except ValueError: continue def _getFrom(self, item_elt): """retrieve published of an item @param item_elt(domish.element): <item> element @return (unicode): full jid as string """ iq_elt = item_elt while iq_elt.parent != None: iq_elt = iq_elt.parent return iq_elt['from'] @defer.inlineCallbacks def publish(self, requestor, service, nodeIdentifier, items): # we retrieve file a first time to check authorisations file_data = yield self.getFileData(requestor, nodeIdentifier) file_id = file_data['id'] comments = [(item['id'], self._getFrom(item), item.toXml()) for item in items] if requestor.userhostJID() == file_data['owner']: peer_jid = None else: peer_jid = requestor.userhost() update_cb = partial(self.commentsUpdate, new_comments=comments, peer_jid=peer_jid) try: yield self.host.memory.fileUpdate(file_id, 'extra', update_cb) except exceptions.PermissionError: raise error.StanzaError('not-authorized') @defer.inlineCallbacks def items(self, requestor, service, nodeIdentifier, maxItems, itemIdentifiers): file_data = yield self.getFileData(requestor, nodeIdentifier) comments = file_data['extra'].get('comments', []) if itemIdentifiers: defer.returnValue([generic.parseXml(c[2]) for c in comments if c[0] in itemIdentifiers]) else: defer.returnValue([generic.parseXml(c[2]) for c in comments]) @defer.inlineCallbacks def retract(self, requestor, service, nodeIdentifier, itemIdentifiers): file_data = yield self.getFileData(requestor, nodeIdentifier) file_id = file_data['id'] try: comments = file_data['extra']['comments'] except KeyError: raise error.StanzaError('item-not-found') to_remove = [] for comment in comments: comment_id = comment[0] if comment_id in itemIdentifiers: to_remove.append(comment) itemIdentifiers.remove(comment_id) if not itemIdentifiers: break if itemIdentifiers: # not all items have been to_remove, we can't continue raise error.StanzaError('item-not-found') if requestor.userhostJID() != file_data['owner']: if not all([c[1] == requestor.userhost() for c in to_remove]): raise error.StanzaError('not-authorized') remove_cb = partial(self.commentsDelete, comments=to_remove) yield self.host.memory.fileUpdate(file_id, 'extra', remove_cb)