Improve error handling.

pubsub_to_atom.py

@@ -55,11 +55,11 @@ async def view_pubsub(request: Request):
     if settings['service']:
         if settings['include'] in pubsub or not settings['include']:
             if pubsub and node and item_id:
-                iq = await xmpp.plugin['xep_0060'].get_item(pubsub, node, item_id)
+                iq = await get_node_item(pubsub, node, item_id)
+                if iq:
                     link = 'xmpp:{pubsub}?;node={node};item={item}'.format(
                         pubsub=pubsub, node=node, item=item_id)
                     xml_atom = generate_rfc_4287(iq, link)
-                result = append_stylesheet(xml_atom)
                     iq = await get_node_items(pubsub, node)
                     if iq:
                         generate_json(iq, node)
@@ -70,6 +70,11 @@ async def view_pubsub(request: Request):
                         filename = 'data/{}.json'.format(node)
                         with open(filename, 'w', encoding='utf-8') as f:
                             json.dump(json_data, f, ensure_ascii=False, indent=4)
+                else:
+                    text = 'Please check that PubSub node and item are valid and accessible.'
+                    xml_atom = error_message(text)
+                result = append_stylesheet(xml_atom)
+                
                 # try:
                 #     iq = await get_node_items(pubsub, node)
                 #     generate_json(iq, node)
@@ -82,13 +87,22 @@ async def view_pubsub(request: Request):
                 #         json.dump(json_data, f, ensure_ascii=False, indent=4)
             elif pubsub and node:
                 iq = await get_node_items(pubsub, node)
+                if iq:
                     link = form_a_link(pubsub, node)
                     xml_atom = generate_rfc_4287(iq, link)
+                else:
+                    text = 'Please check that PubSub node is valid and accessible.'
+                    xml_atom = error_message(text)
                 result = append_stylesheet(xml_atom)
             elif pubsub:
-                iq = await xmpp.plugin['xep_0060'].get_nodes(pubsub)
+                iq = await get_nodes(pubsub)
+                if iq:
                     link = 'xmpp:{pubsub}'.format(pubsub=pubsub)
                     result = pubsub_to_opml(iq)
+                else:
+                    text = 'Please check that PubSub Jabber ID is valid and accessible.'
+                    xml_atom = error_message(text)
+                result = append_stylesheet(xml_atom)
             elif node:
                 text = 'PubSub parameter is missing.'
                 xml_atom = error_message(text)
@@ -130,11 +144,25 @@ def get_configuration(section):
     return result
 
 #@timeout(5)
+async def get_node_item(pubsub, node, item_id):
+    try:
+      iq = await xmpp.plugin['xep_0060'].get_item(pubsub, node, item_id, timeout=5)
+      return iq
+    except (IqError, IqTimeout) as e:
+      print(e)
+
 async def get_node_items(pubsub, node):
     try:
       iq = await xmpp.plugin['xep_0060'].get_items(pubsub, node, timeout=5)
       return iq
-    except IqTimeout as e:
+    except (IqError, IqTimeout) as e:
+      print(e)
+
+async def get_nodes(pubsub):
+    try:
+      await xmpp.plugin['xep_0060'].get_nodes(pubsub, timeout=5)
+      return iq
+    except (IqError, IqTimeout) as e:
       print(e)
 
 def form_a_link(pubsub, node):

script/postprocess.js

@@ -23,10 +23,10 @@ window.onload = async function(){
     element.innerHTML = marked.parse(markDown);
   }
   // Build a journal list
-  if (locationHref.searchParams.get('item')) {
+  itemsList = await openJson(node)
+  if (itemsList && locationHref.searchParams.get('item')) {
     node = locationHref.searchParams.get('node')
     pubsub = locationHref.searchParams.get('pubsub')
-    itemsList = await openJson(node)
     let elementDiv = document.createElement('div');
     elementDiv.id = 'journal';
     let elementH3 = document.createElement('h3');
@@ -74,10 +74,14 @@ window.onload = async function(){
   for (let xmppLink of document.querySelectorAll('a[href^="xmpp:"]')) {
     xmppUri = new URL(xmppLink);
     let parameters = xmppUri.search.split(';');
+    try {
       let node = parameters.find(parameter => parameter.startsWith('node=')).split('=')[1];
       let item = parameters.find(parameter => parameter.startsWith('item=')).split('=')[1];
       let pubsub = xmppUri.pathname;
       xmppLink.href = `atom?pubsub=${pubsub}&node=${node}&item=${item}`
+    } catch (err) {
+      console.warn(err)
+    }
   }
   // Display a selection of suggested software.
   const selection = {
@@ -173,13 +177,6 @@ async function openJson(nodeId) {
     return json;
   })
   .catch(err => {
-    throw new Error('Error: ' + err);
+    console.warn(err);
   })
 }
-
-function parseXmppPubsubLink(link) {
-  const parts = link.split(';');
-  const node = parts.find(part => part.startsWith('node=')).split('=')[1];
-  const item = parts.find(part => part.startsWith('item=')).split('=')[1];
-  return { node, item };
-}