--- a/sat/core/xmpp.py	Sun Sep 20 11:03:24 2020 +0200
+++ b/sat/core/xmpp.py	Sun Sep 20 14:04:11 2020 +0200
@@ -21,6 +21,7 @@
 import calendar
 import uuid
 import mimetypes
+from typing import Tuple
 from urllib.parse import urlparse, unquote
 from functools import partial
 from pathlib import Path
@@ -1059,6 +1060,46 @@
         if self.sendHistory:
             post_xml_treatments.addCallback(self.messageAddToHistory)
 
+    def getOwnerFromJid(self, to_jid: jid.JID) -> jid.JID:
+        """Retrieve "owner" of a component resource from the destination jid of the request
+
+        This method needs plugin XEP-0106 for unescaping, if you use it you must add the
+        plugin to your dependencies.
+        A "user" part must be present in "to_jid" (otherwise, the component itself is addressed)
+        @param to_jid: destination JID of the request
+        """
+        try:
+            unescape = self.host_app.plugins['XEP-0106'].unescape
+        except KeyError:
+            raise exceptions.MissingPlugin("Plugin XEP-0106 is needed to retrieve owner")
+        else:
+            user = unescape(to_jid.user)
+        if '@' in user:
+            # a full jid is specified
+            return jid.JID(user)
+        else:
+            # only user part is specified, we use our own host to build the full jid
+            return jid.JID(None, (user, self.host, None))
+
+    def getOwnerAndPeer(self, iq_elt: domish.Element) -> Tuple[jid.JID, jid.JID]:
+        """Retrieve owner of a component jid, and the jid of the requesting peer
+
+        "owner" is found by either unescaping full jid from node, or by combining node
+        with our host.
+        Peer jid is the requesting jid from the IQ element
+        @param iq_elt: IQ stanza sent from the requested
+        @return: owner and peer JIDs
+        """
+        to_jid = jid.JID(iq_elt['to'])
+        if to_jid.user:
+            owner = self.getOwnerFromJid(to_jid)
+        else:
+            owner = jid.JID(iq_elt["from"]).userhostJID()
+
+        peer_jid = jid.JID(iq_elt["from"])
+        return peer_jid, owner
+
+
 
 class SatMessageProtocol(xmppim.MessageProtocol):