send client side javascript errors to the server

node/server.js

@@ -312,6 +312,16 @@ async.waterfall([
       });
     });
     
+    //The Etherpad client side sends information about client side javscript errors
+    app.post('/jserror', function(req, res)
+    {
+      new formidable.IncomingForm().parse(req, function(err, fields, files) 
+      { 
+        console.error("CLIENT SIDE JAVASCRIPT ERROR: " + fields.errorInfo);
+        res.end("OK");
+      });
+    });
+    
     //serve index.html under /
     app.get('/', function(req, res)
     {

static/js/pad_utils.js

@@ -461,3 +461,15 @@ var padutils = {
     });
   }
 };
+
+//send javascript errors to the server
+window.onerror = function test (msg, url, linenumber)
+{
+ var errObj = {errorInfo: JSON.stringify({msg: msg, url: url, linenumber: linenumber, userAgent: navigator.userAgent})};
+ var loc = document.location;
+ var url = loc.protocol + "//" + loc.hostname + ":" + loc.port + "/" + loc.pathname.substr(1, loc.pathname.indexOf("/p/")) + "jserror";
+ 
+ $.post(url, errObj);
+ 
+ return false;
+};