Better handling of HTTP request errors; re-send keep-alive requests on failure (#1488449)

program/include/rcmail.php

@@ -325,7 +325,7 @@ class rcmail extends rcube
     $this->output->set_charset(RCMAIL_CHARSET);
 
     // add some basic labels to client
-    $this->output->add_label('loading', 'servererror');
+    $this->output->add_label('loading', 'servererror', 'requesttimedout');
 
     return $this->output;
   }

program/js/app.js

@@ -54,9 +54,10 @@ function rcube_webmail()
 
   // set jQuery ajax options
   $.ajaxSetup({
-    cache:false,
-    error:function(request, status, err){ ref.http_error(request, status, err); },
-    beforeSend:function(xmlhttp){ xmlhttp.setRequestHeader('X-Roundcube-Request', ref.env.request_token); }
+    cache: false,
+    timeout: this.env.request_timeout * 1000,
+    error: function(request, status, err){ ref.http_error(request, status, err); },
+    beforeSend: function(xmlhttp){ xmlhttp.setRequestHeader('X-Roundcube-Request', ref.env.request_token); }
   });
 
   // set environment variable(s)
@@ -955,8 +956,6 @@ function rcube_webmail()
         form.action = this.add_url(form.action, '_lang', lang);
         form.submit();
 
-        // clear timeout (sending could take longer)
-        clearTimeout(this.request_timer);
         break;
 
       case 'send-attachment':
@@ -1158,14 +1157,6 @@ function rcube_webmail()
     if (this.gui_objects.editform)
       this.lock_form(this.gui_objects.editform, a);
 
-    // clear pending timer
-    if (this.request_timer)
-      clearTimeout(this.request_timer);
-
-    // set timer for requests
-    if (a && this.env.request_timeout)
-      this.request_timer = setTimeout(function(){ ref.request_timed_out(); }, this.env.request_timeout * 1000);
-
     return id;
   };
 
@@ -1204,13 +1195,6 @@ function rcube_webmail()
     return url.replace(/_task=[a-z]+/, '_task='+task);
   };
 
-  // called when a request timed out
-  this.request_timed_out = function()
-  {
-    this.set_busy(false);
-    this.display_message('Request timed out!', 'error');
-  };
-
   this.reload = function(delay)
   {
     if (this.is_framed())
@@ -5997,7 +5981,7 @@ function rcube_webmail()
     return $.ajax({
       type: 'GET', url: url, data: { _unlock:(lock?lock:0) }, dataType: 'json',
       success: function(data){ ref.http_response(data); },
-      error: function(o, status, err) { rcmail.http_error(o, status, err, lock); }
+      error: function(o, status, err) { ref.http_error(o, status, err, lock, action); }
     });
   };
 
@@ -6029,7 +6013,7 @@ function rcube_webmail()
     return $.ajax({
       type: 'POST', url: url, data: postdata, dataType: 'json',
       success: function(data){ ref.http_response(data); },
-      error: function(o, status, err) { rcmail.http_error(o, status, err, lock); }
+      error: function(o, status, err) { ref.http_error(o, status, err, lock, action); }
     });
   };
 
@@ -6161,7 +6145,7 @@ function rcube_webmail()
   };
 
   // handle HTTP request errors
-  this.http_error = function(request, status, err, lock)
+  this.http_error = function(request, status, err, lock, action)
   {
     var errmsg = request.statusText;
 
@@ -6170,6 +6154,16 @@ function rcube_webmail()
 
     if (request.status && errmsg)
       this.display_message(this.get_label('servererror') + ' (' + errmsg + ')', 'error');
+    else if (status == 'timeout')
+      this.display_message(this.get_label('requesttimedout'), 'error');
+    else if (request.status == 0 && status != 'abort')
+      this.display_message(this.get_label('servererror') + ' (No connection)', 'error');
+
+    // re-send keep-alive requests after 30 seconds
+    if (action == 'keep-alive')
+      setTimeout(function(){ ref.keep_alive(); }, 30000);
+    else if (action == 'check-recent')
+      setTimeout(function(){ ref.check_for_recent(false); }, 30000);
   };
 
   // post the given form to a hidden iframe

program/localization/de_CH/messages.inc

@@ -23,6 +23,7 @@ $messages['storageerror'] = 'Keine Verbindung zum IMAP Server';
 $messages['servererror'] = 'Serverfehler!';
 $messages['servererrormsg'] = 'Serverfehler: $msg';
 $messages['dberror'] = 'Datenbankfehler!';
+$messages['requesttimedout'] = 'Zeitlimit überschritten';
 $messages['errorreadonly'] = 'Die Aktion kann nicht ausgeführt werden. Der Ordner ist schreibgeschützt.';
 $messages['errornoperm'] = 'Die Aktion kann nicht ausgeführt werden. Zugriff verweigert.';
 $messages['invalidrequest'] = 'Ungültige Anfrage! Es wurden keine Daten gespeichert.';

program/localization/de_DE/messages.inc

@@ -23,6 +23,7 @@ $messages['storageerror'] = 'Keine Verbindung zum IMAP Server.';
 $messages['servererror'] = 'Serverfehler!';
 $messages['servererrormsg'] = 'Serverfehler: $msg';
 $messages['dberror'] = 'Datenbankfehler!';
+$messages['requesttimedout'] = 'Zeitlimit überschritten';
 $messages['errorreadonly'] = 'Die Aktion kann nicht ausgeführt werden. Der Ordner ist schreibgeschützt.';
 $messages['errornoperm'] = 'Die Aktion kann nicht ausgeführt werden. Zugriff verweigert.';
 $messages['invalidrequest'] = 'Ungültige Anfrage! Es wurden keine Daten gespeichert.';

program/localization/en_US/messages.inc

@@ -29,6 +29,7 @@ $messages['storageerror'] = 'Connection to storage server failed.';
 $messages['servererror'] = 'Server Error!';
 $messages['servererrormsg'] = 'Server Error: $msg';
 $messages['dberror'] = 'Database Error!';
+$messages['requesttimedout'] = 'Request timed out';
 $messages['errorreadonly'] = 'Unable to perform operation. Folder is read-only.';
 $messages['errornoperm'] = 'Unable to perform operation. Permission denied.';
 $messages['invalidrequest'] = 'Invalid request! No data was saved.';