Mercurial > libervia-backend
view sat/plugins/plugin_xep_0264.py @ 3696:52ee22d78e18
plugin XEP-0384: fix encryption for user own devices:
our own jid is added automatically by OMEMO library, but during the generation of the
stanza, our list of jids was used to get the keys (and thus our own jid and devices keys
was missing).
fix 402
author | Goffi <goffi@goffi.org> |
---|---|
date | Fri, 22 Oct 2021 18:46:51 +0200 |
parents | be6d91572633 |
children | 2dab494e56fc |
line wrap: on
line source
#!/usr/bin/env python3 # SàT plugin for managing xep-0264 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org) # Copyright (C) 2014 Emmanuel Gil Peyrot (linkmauve@linkmauve.fr) # 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.log import getLogger log = getLogger(__name__) from twisted.internet import threads from twisted.python.failure import Failure from zope.interface import implementer from wokkel import disco, iwokkel from sat.core import exceptions import hashlib try: from PIL import Image, ImageOps except: raise exceptions.MissingModule( "Missing module pillow, please download/install it from https://python-pillow.github.io" ) # cf. https://stackoverflow.com/a/23575424 from PIL import ImageFile ImageFile.LOAD_TRUNCATED_IMAGES = True try: from twisted.words.protocols.xmlstream import XMPPHandler except ImportError: from wokkel.subprotocols import XMPPHandler MIME_TYPE = "image/jpeg" SAVE_FORMAT = "JPEG" # (cf. Pillow documentation) NS_THUMBS = "urn:xmpp:thumbs:1" PLUGIN_INFO = { C.PI_NAME: "XEP-0264", C.PI_IMPORT_NAME: "XEP-0264", C.PI_TYPE: "XEP", C.PI_MODES: C.PLUG_MODE_BOTH, C.PI_PROTOCOLS: ["XEP-0264"], C.PI_DEPENDENCIES: ["XEP-0234"], C.PI_MAIN: "XEP_0264", C.PI_HANDLER: "yes", C.PI_DESCRIPTION: _("""Thumbnails handling"""), } class XEP_0264(object): SIZE_SMALL = (320, 320) SIZE_MEDIUM = (640, 640) SIZE_BIG = (1280, 1280) SIZE_FULL_SCREEN = (2560, 2560) SIZES = (SIZE_SMALL, SIZE_MEDIUM, SIZE_FULL_SCREEN) def __init__(self, host): log.info(_("Plugin XEP_0264 initialization")) self.host = host host.trigger.add("XEP-0234_buildFileElement", self._addFileThumbnails) host.trigger.add("XEP-0234_parseFileElement", self._getFileThumbnails) def getHandler(self, client): return XEP_0264_handler() ## triggers ## def _addFileThumbnails(self, client, file_elt, extra_args): try: thumbnails = extra_args["extra"][C.KEY_THUMBNAILS] except KeyError: return for thumbnail in thumbnails: thumbnail_elt = file_elt.addElement((NS_THUMBS, "thumbnail")) thumbnail_elt["uri"] = "cid:" + thumbnail["id"] thumbnail_elt["media-type"] = MIME_TYPE width, height = thumbnail["size"] thumbnail_elt["width"] = str(width) thumbnail_elt["height"] = str(height) return True def _getFileThumbnails(self, client, file_elt, file_data): thumbnails = [] for thumbnail_elt in file_elt.elements(NS_THUMBS, "thumbnail"): uri = thumbnail_elt["uri"] if uri.startswith("cid:"): thumbnail = {"id": uri[4:]} width = thumbnail_elt.getAttribute("width") height = thumbnail_elt.getAttribute("height") if width and height: try: thumbnail["size"] = (int(width), int(height)) except ValueError: pass try: thumbnail["mime_type"] = thumbnail_elt["media-type"] except KeyError: pass thumbnails.append(thumbnail) if thumbnails: # we want thumbnails ordered from smallest to biggest thumbnails.sort(key=lambda t: t.get('size', (0, 0))) file_data.setdefault("extra", {})[C.KEY_THUMBNAILS] = thumbnails return True ## thumbnails generation ## def getThumbId(self, image_uid, size): """return an ID unique for image/size combination @param image_uid(unicode): unique id of the image can be a hash @param size(tuple(int)): requested size of thumbnail @return (unicode): unique id for this image/size """ return hashlib.sha256(repr((image_uid, size)).encode()).hexdigest() def _blockingGenThumb( self, source_path, size=None, max_age=None, image_uid=None, fix_orientation=True): """Generate a thumbnail for image This is a blocking method and must be executed in a thread params are the same as for [generateThumbnail] """ if size is None: size = self.SIZE_SMALL try: img = Image.open(source_path) except IOError: return Failure(exceptions.DataError("Can't open image")) img.thumbnail(size) if fix_orientation: img = ImageOps.exif_transpose(img) uid = self.getThumbId(image_uid or source_path, size) with self.host.common_cache.cacheData( PLUGIN_INFO[C.PI_IMPORT_NAME], uid, MIME_TYPE, max_age ) as f: img.save(f, SAVE_FORMAT) if fix_orientation: log.debug(f"fixed orientation for {f.name}") return img.size, uid def generateThumbnail( self, source_path, size=None, max_age=None, image_uid=None, fix_orientation=True): """Generate a thumbnail of image @param source_path(unicode): absolute path to source image @param size(int, None): max size of the thumbnail can be one of self.SIZE_* None to use default value (i.e. self.SIZE_SMALL) @param max_age(int, None): same as for [memory.cache.Cache.cacheData]) @param image_uid(unicode, None): unique ID to identify the image use hash whenever possible if None, source_path will be used @param fix_orientation(bool): if True, fix orientation using EXIF data @return D(tuple[tuple[int,int], unicode]): tuple with: - size of the thumbnail - unique Id of the thumbnail """ d = threads.deferToThread( self._blockingGenThumb, source_path, size, max_age, image_uid=image_uid, fix_orientation=fix_orientation ) d.addErrback( lambda failure_: log.error("thumbnail generation error: {}".format(failure_)) ) return d @implementer(iwokkel.IDisco) class XEP_0264_handler(XMPPHandler): def getDiscoInfo(self, requestor, target, nodeIdentifier=""): return [disco.DiscoFeature(NS_THUMBS)] def getDiscoItems(self, requestor, target, nodeIdentifier=""): return []