core (xmpp/messages): Optimize and avoir exception on parse_message:

- When we want to disco a bare JID, disco its server instead, to avoid many uncached
requests. In most case, the server disco is enough to discover JID origin.
- Avoid exception on `exceptions.ExternalRequestError`, print a warning instead.

libervia/backend/core/xmpp.py

@@ -1649,24 +1649,36 @@ class SatMessageProtocol(xmppim.MessageProtocol):
 
         # origin
         if not from_jid_bare in (client.jid.userhostJID(), client.server_jid):
-            disco_infos = await G.host.memory.disco.get_infos(client, from_jid_bare)
-            if from_jid_bare.user:
-                domain_disco_infos = await G.host.memory.disco.get_infos(
-                    client, jid.JID(from_jid_bare.host)
+            try:
+                # For bare JIDs, query the server instead: bare jids are not cached by
+                # XEP-0115, so we'll have an actual disco request each time. On the other
+                # hand, server disco is cached after first request, and should gives us
+                # the gateway/origin info we need.
+                # FIXME: Check if this cause trouble in practice.
+                query_jid = from_jid if from_jid.resource else jid.JID(from_jid.host)
+                disco_infos = await G.host.memory.disco.get_infos(client, query_jid)
+                if from_jid_bare.user:
+                    domain_disco_infos = await G.host.memory.disco.get_infos(
+                        client, jid.JID(from_jid_bare.host)
+                    )
+                else:
+                    domain_disco_infos = disco_infos
+                if ("client", "bot") in disco_infos.identities:
+                    extra["is-bot"] = True
+                for (
+                    category,
+                    type_,
+                ), identities_map in domain_disco_infos.identities.items():
+                    for lang, identity in identities_map.items():
+                        if category == "gateway":
+                            extra["origin"] = identity.type
+                        if identity.name:
+                            extra["origin_name"] = identity.name
+            except exceptions.ExternalRequestError:
+                log.warning(
+                    f"Disco query failed for {from_jid.full()}, skipping identity "
+                    "detection"
                 )
-            else:
-                domain_disco_infos = disco_infos
-            if ("client", "bot") in disco_infos.identities:
-                extra["is-bot"] = True
-            for (
-                category,
-                type_,
-            ), identities_map in domain_disco_infos.identities.items():
-                for lang, identity in identities_map.items():
-                    if category == "gateway":
-                        extra["origin"] = identity.type
-                    if identity.name:
-                        extra["origin_name"] = identity.name
 
         # message
         for e in message_elt.elements(C.NS_CLIENT, "body"):