Mercurial > libervia-backend
view sat/plugins/plugin_xep_0363.py @ 3144:02325c3141dd
core (constants): parse `sat.conf` from `sat` module dir
author | Goffi <goffi@goffi.org> |
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date | Wed, 29 Jan 2020 19:05:41 +0100 |
parents | 559a625a236b |
children | 3a8755fdc78d |
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#!/usr/bin/env python3 # SAT plugin for HTTP File Upload (XEP-0363) # Copyright (C) 2009-2020 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/>. import os.path import mimetypes from dataclasses import dataclass from wokkel import disco, iwokkel from zope.interface import implementer from twisted.words.protocols.jabber import jid from twisted.words.protocols.jabber.xmlstream import XMPPHandler from twisted.internet import reactor from twisted.internet import defer from twisted.web import client as http_client from twisted.web import http_headers from sat.core.i18n import _ from sat.core.constants import Const as C from sat.core.log import getLogger from sat.core import exceptions from sat.tools import web as sat_web log = getLogger(__name__) PLUGIN_INFO = { C.PI_NAME: "HTTP File Upload", C.PI_IMPORT_NAME: "XEP-0363", C.PI_TYPE: "XEP", C.PI_PROTOCOLS: ["XEP-0363"], C.PI_DEPENDENCIES: ["FILE", "UPLOAD"], C.PI_MAIN: "XEP_0363", C.PI_HANDLER: "yes", C.PI_DESCRIPTION: _("""Implementation of HTTP File Upload"""), } NS_HTTP_UPLOAD = "urn:xmpp:http:upload:0" ALLOWED_HEADERS = ('authorization', 'cookie', 'expires') @dataclass class Slot: """Upload slot""" put: str get: str headers: list class XEP_0363(object): def __init__(self, host): log.info(_("plugin HTTP File Upload initialization")) self.host = host host.bridge.addMethod( "fileHTTPUpload", ".plugin", in_sign="sssbs", out_sign="", method=self._fileHTTPUpload, ) host.bridge.addMethod( "fileHTTPUploadGetSlot", ".plugin", in_sign="sisss", out_sign="(ss)", method=self._getSlot, async_=True, ) host.plugins["UPLOAD"].register( "HTTP Upload", self.getHTTPUploadEntity, self.fileHTTPUpload ) def getHandler(self, client): return XEP_0363_handler() async def getHTTPUploadEntity(self, client, upload_jid=None): """Get HTTP upload capable entity upload_jid is checked, then its components @param upload_jid(None, jid.JID): entity to check @return(D(jid.JID)): first HTTP upload capable entity @raise exceptions.NotFound: no entity found """ try: entity = client.http_upload_service except AttributeError: found_entities = await self.host.findFeaturesSet(client, (NS_HTTP_UPLOAD,)) try: entity = client.http_upload_service = next(iter(found_entities)) except StopIteration: entity = client.http_upload_service = None if entity is None: raise exceptions.NotFound("No HTTP upload entity found") return entity def _fileHTTPUpload(self, filepath, filename="", upload_jid="", ignore_tls_errors=False, profile=C.PROF_KEY_NONE): assert os.path.isabs(filepath) and os.path.isfile(filepath) client = self.host.getClient(profile) progress_id_d, __ = defer.ensureDeferred(self.fileHTTPUpload( client, filepath, filename or None, jid.JID(upload_jid) if upload_jid else None, {"ignore_tls_errors": ignore_tls_errors}, )) return progress_id_d async def fileHTTPUpload( self, client, filepath, filename=None, upload_jid=None, options=None): """Upload a file through HTTP @param filepath(str): absolute path of the file @param filename(None, unicode): name to use for the upload None to use basename of the path @param upload_jid(jid.JID, None): upload capable entity jid, or None to use autodetected, if possible @param options(dict): options where key can be: - ignore_tls_errors(bool): if True, SSL certificate will not be checked @param profile: %(doc_profile)s @return (D(tuple[D(unicode), D(unicode)])): progress id and Deferred which fire download URL """ if options is None: options = {} ignore_tls_errors = options.get("ignore_tls_errors", False) filename = filename or os.path.basename(filepath) size = os.path.getsize(filepath) size_adjust = [] #: this trigger can be used to modify the requested size, it is notably useful #: with encryption. The size_adjust is a list which can be filled by int to add #: to the initial size self.host.trigger.point( "XEP-0363_upload_size", client, options, filepath, size, size_adjust, triggers_no_cancel=True) if size_adjust: size = sum([size, *size_adjust]) try: slot = await self.getSlot(client, filename, size, upload_jid=upload_jid) except Exception as e: log.warning(_("Can't get upload slot: {reason}").format(reason=e)) raise e else: log.debug(f"Got upload slot: {slot}") sat_file = self.host.plugins["FILE"].File( self.host, client, filepath, size=size, auto_end_signals=False ) progress_id = sat_file.uid file_producer = http_client.FileBodyProducer(sat_file) if ignore_tls_errors: agent = http_client.Agent(reactor, sat_web.NoCheckContextFactory()) else: agent = http_client.Agent(reactor) headers = {"User-Agent": [C.APP_NAME.encode("utf-8")]} for name, value in slot.headers: name = name.encode('utf-8') value = value.encode('utf-8') headers[name] = value await self.host.trigger.asyncPoint( "XEP-0363_upload", client, options, sat_file, file_producer, slot, triggers_no_cancel=True) download_d = agent.request( b"PUT", slot.put.encode("utf-8"), http_headers.Headers(headers), file_producer, ) download_d.addCallbacks( self._uploadCb, self._uploadEb, (sat_file, slot), None, (sat_file), ) return progress_id, download_d def _uploadCb(self, __, sat_file, slot): """Called once file is successfully uploaded @param sat_file(SatFile): file used for the upload should be closed, but it is needed to send the progressFinished signal @param slot(Slot): put/get urls """ log.info("HTTP upload finished") sat_file.progressFinished({"url": slot.get}) return slot.get def _uploadEb(self, failure_, sat_file): """Called on unsuccessful upload @param sat_file(SatFile): file used for the upload should be closed, be is needed to send the progressError signal """ try: wrapped_fail = failure_.value.reasons[0] except (AttributeError, IndexError) as e: log.warning(_("upload failed: {reason}").format(reason=e)) sat_file.progressError(str(failure_)) else: if wrapped_fail.check(sat_web.SSLError): msg = "TLS validation error, can't connect to HTTPS server" else: msg = "can't upload file" log.warning(msg + ": " + str(wrapped_fail.value)) sat_file.progressError(msg) raise failure_ def _getSlot(self, filename, size, content_type, upload_jid, profile_key=C.PROF_KEY_NONE): """Get an upload slot This method can be used when uploading is done by the frontend @param filename(unicode): name of the file to upload @param size(int): size of the file (must be non null) @param upload_jid(jid.JID(), None, ''): HTTP upload capable entity @param content_type(unicode, None): MIME type of the content empty string or None to guess automatically """ client = self.host.getClient(profile_key) filename = filename.replace("/", "_") return defer.ensureDeferred(self.getSlot( client, filename, size, content_type or None, upload_jid or None )) async def getSlot(self, client, filename, size, content_type=None, upload_jid=None): """Get a slot (i.e. download/upload links) @param filename(unicode): name to use for the upload @param size(int): size of the file to upload (must be >0) @param content_type(None, unicode): MIME type of the content None to autodetect @param upload_jid(jid.JID, None): HTTP upload capable upload_jid or None to use the server component (if any) @param client: %(doc_client)s @return (Slot): the upload (put) and download (get) URLs @raise exceptions.NotFound: no HTTP upload capable upload_jid has been found """ assert filename and size if content_type is None: # TODO: manage python magic for file guessing (in a dedicated plugin ?) content_type = mimetypes.guess_type(filename, strict=False)[0] if upload_jid is None: try: upload_jid = client.http_upload_service except AttributeError: found_entity = await self.getHTTPUploadEntity(profile=client.profile) return await self.getSlot( client, filename, size, content_type, found_entity) else: if upload_jid is None: raise exceptions.NotFound("No HTTP upload entity found") iq_elt = client.IQ("get") iq_elt["to"] = upload_jid.full() request_elt = iq_elt.addElement((NS_HTTP_UPLOAD, "request")) request_elt["filename"] = filename request_elt["size"] = str(size) if content_type is not None: request_elt["content-type"] = content_type iq_result_elt = await iq_elt.send() try: slot_elt = next(iq_result_elt.elements(NS_HTTP_UPLOAD, "slot")) put_elt = next(slot_elt.elements(NS_HTTP_UPLOAD, "put")) put_url = put_elt['url'] get_elt = next(slot_elt.elements(NS_HTTP_UPLOAD, "get")) get_url = get_elt['url'] except (StopIteration, KeyError): raise exceptions.DataError("Incorrect stanza received from server") headers = [] for header_elt in put_elt.elements(NS_HTTP_UPLOAD, "header"): try: name = header_elt["name"] value = str(header_elt) except KeyError: log.warning(_("Invalid header element: {xml}").format( iq_result_elt.toXml())) continue name = name.replace('\n', '') value = value.replace('\n', '') if name.lower() not in ALLOWED_HEADERS: log.warning(_('Ignoring unauthorised header "{name}": {xml}') .format(name=name, xml = iq_result_elt.toXml())) continue headers.append((name, value)) return Slot(put=put_url, get=get_url, headers=headers) @implementer(iwokkel.IDisco) class XEP_0363_handler(XMPPHandler): def getDiscoInfo(self, requestor, target, nodeIdentifier=""): return [disco.DiscoFeature(NS_HTTP_UPLOAD)] def getDiscoItems(self, requestor, target, nodeIdentifier=""): return []