diff --git a/sat/core/xmpp.py b/sat/core/xmpp.py
index cf3630f3..13968487 100644
--- a/sat/core/xmpp.py
+++ b/sat/core/xmpp.py
@@ -21,6 +21,7 @@ import time
 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 @@ class SatXMPPComponent(SatXMPPEntity, component.Component):
         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):
 
diff --git a/sat/plugins/plugin_xep_0329.py b/sat/plugins/plugin_xep_0329.py
index d193b099..c3916908 100644
--- a/sat/plugins/plugin_xep_0329.py
+++ b/sat/plugins/plugin_xep_0329.py
@@ -590,24 +590,10 @@ class XEP_0329(object):
         @param iq_elt(domish.Element): IQ stanza of the FIS request
         @return (tuple[jid.JID, jid.JID]): peer_jid and owner
         """
-        to_jid = jid.JID(iq_elt['to'])
-        if to_jid.user:
-            user = self.host.plugins['XEP-0106'].unescape(to_jid.user)
-            if '@' in user:
-                # a full jid is specified
-                owner = jid.JID(user)
-            else:
-                # only user part is specified, we use our own host to build the full jid
-                owner = jid.JID(None, (user, client.host, None))
-        else:
-            owner = jid.JID(iq_elt["from"]).userhostJID()
-
-        peer_jid = jid.JID(iq_elt["from"])
-        return peer_jid, owner
 
     @defer.inlineCallbacks
     def _compGetRootNodesCb(self, client, iq_elt):
-        peer_jid, owner = self._compParseJids(client, iq_elt)
+        peer_jid, owner = client.getOwnerAndPeer(iq_elt)
         files_data = yield self.host.memory.getFiles(
             client,
             peer_jid=peer_jid,
@@ -632,7 +618,7 @@ class XEP_0329(object):
                                                files_data):
             can be used to add data/elements
         """
-        peer_jid, owner = self._compParseJids(client, iq_elt)
+        peer_jid, owner = client.getOwnerAndPeer(iq_elt)
         try:
             files_data = yield self.host.memory.getFiles(
                 client, peer_jid=peer_jid, path=node_path, owner=owner
@@ -733,7 +719,7 @@ class XEP_0329(object):
     # affiliations #
 
     async def _parseElement(self, client, iq_elt, element, namespace):
-        peer_jid, owner = self._compParseJids(client, iq_elt)
+        peer_jid, owner = client.getOwnerAndPeer(iq_elt)
         elt = next(iq_elt.elements(namespace, element))
         path = Path("/", elt['path'])
         if len(path.parts) < 2:
@@ -838,7 +824,7 @@ class XEP_0329(object):
             return
         except RootPathException:
             # if root path is requested, we only get owner affiliation
-            peer_jid, owner = self._compParseJids(client, iq_elt)
+            peer_jid, owner = client.getOwnerAndPeer(iq_elt)
             is_owner = peer_jid.userhostJID() == owner
             affiliations = {owner: 'owner'}
         except exceptions.NotFound:
@@ -1080,7 +1066,7 @@ class XEP_0329(object):
         defer.ensureDeferred(self.onComponentCreateDir(client, iq_elt))
 
     async def onComponentCreateDir(self, client, iq_elt):
-        peer_jid, owner = self._compParseJids(client, iq_elt)
+        peer_jid, owner = client.getOwnerAndPeer(iq_elt)
         if peer_jid.host not in client._file_sharing_allowed_hosts:
             client.sendError(iq_elt, 'forbidden')
             return