diff --git a/sat/plugins/plugin_xep_0447.py b/sat/plugins/plugin_xep_0447.py
new file mode 100644
index 00000000..4e84aae8
--- /dev/null
+++ b/sat/plugins/plugin_xep_0447.py
@@ -0,0 +1,142 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2009-2022 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 .
+
+from typing import Optional, Dict, List, Tuple, Union, Any
+
+from twisted.words.xish import domish
+
+from sat.core.constants import Const as C
+from sat.core.i18n import _
+from sat.core.log import getLogger
+from sat.core import exceptions
+
+log = getLogger(__name__)
+
+
+PLUGIN_INFO = {
+ C.PI_NAME: "Stateless File Sharing",
+ C.PI_IMPORT_NAME: "XEP-0447",
+ C.PI_TYPE: "XEP",
+ C.PI_MODES: C.PLUG_MODE_BOTH,
+ C.PI_PROTOCOLS: ["XEP-0447"],
+ C.PI_DEPENDENCIES: ["XEP-0103", "XEP-0446"],
+ C.PI_MAIN: "XEP_0447",
+ C.PI_HANDLER: "no",
+ C.PI_DESCRIPTION: _("""Implementation of XEP-0447 (Stateless File Sharing)"""),
+}
+
+NS_SFS = "urn:xmpp:sfs:0"
+
+
+class XEP_0447:
+ namespace = NS_SFS
+
+ def __init__(self, host):
+ log.info(_("XEP-0447 (Stateless File Sharing) plugin initialization"))
+ host.registerNamespace("sfs", NS_SFS)
+ self._u = host.plugins["XEP-0103"]
+ self._m = host.plugins["XEP-0446"]
+
+ def get_file_sharing_elt(
+ self,
+ sources: List[Dict[str, Any]],
+ disposition: Optional[str] = None,
+ name: Optional[str] = None,
+ media_type: Optional[str] = None,
+ desc: Optional[str] = None,
+ size: Optional[int] = None,
+ file_hash: Optional[Tuple[str, str]] = None,
+ date: Optional[Union[float, int]] = None,
+ width: Optional[int] = None,
+ height: Optional[int] = None,
+ length: Optional[int] = None,
+ thumbnail: Optional[str] = None,
+ **kwargs,
+ ) -> domish.Element:
+ """Generate the element
+
+ @param extra: extra metadata describing how to access the URL
+ @return: ```` element
+ """
+ file_sharing_elt = domish.Element((NS_SFS, "file-sharing"))
+ if disposition is not None:
+ file_sharing_elt["disposition"] = disposition
+ file_sharing_elt.addChild(
+ self._m.get_file_metadata_elt(
+ name=name,
+ media_type=media_type,
+ desc=desc,
+ size=size,
+ file_hash=file_hash,
+ date=date,
+ width=width,
+ height=height,
+ length=length,
+ thumbnail=thumbnail,
+ )
+ )
+ sources_elt = file_sharing_elt.addElement("sources")
+ for source_data in sources:
+ if "url" in source_data:
+ sources_elt.addChild(
+ self._u.get_url_data_elt(**source_data)
+ )
+ else:
+ raise NotImplementedError(
+ f"source data not implemented: {source_data}"
+ )
+
+ return file_sharing_elt
+
+ def parse_file_sharing_elt(
+ self,
+ file_sharing_elt: domish.Element
+ ) -> Dict[str, Any]:
+ """Parse element and return file-sharing data
+
+ @param file_sharing_elt: element
+ @return: file-sharing data. It a dict whose keys correspond to
+ [get_file_sharing_elt] parameters
+ """
+ if file_sharing_elt.name != "file-sharing":
+ try:
+ file_sharing_elt = next(
+ file_sharing_elt.elements(NS_SFS, "file-sharing")
+ )
+ except StopIteration:
+ raise exceptions.NotFound
+ try:
+ data = self._m.parse_file_metadata_elt(file_sharing_elt)
+ except exceptions.NotFound:
+ data = {}
+ disposition = file_sharing_elt.getAttribute("disposition")
+ if disposition is not None:
+ data["disposition"] = disposition
+ sources = data["sources"] = []
+ try:
+ sources_elt = next(file_sharing_elt.elements(NS_SFS, "sources"))
+ except StopIteration:
+ raise ValueError(f" element is missing: {file_sharing_elt.toXml()}")
+ for elt in sources_elt.elements():
+ if elt.name == "url-data" and elt.uri == self._u.namespace:
+ source_data = self._u.parse_url_data_elt(elt)
+ else:
+ log.warning(f"unmanaged file sharing element: {elt.toXml}")
+ continue
+ sources.append(source_data)
+
+ return data