first shot at Exceptional for javascript

Author: ciaranlee

Gemfile

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+source 'http://rubygems.org' 
+
+gem "rack"
+gem "sinatra"
+gem "newrelic_rpm"

config.ru

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+require './js.rb'
+run Sinatra::Application

js.rb

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+require 'sinatra'
+
+set :public, File.dirname(__FILE__) + '/public'

public/exceptional.js

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+var Exceptional = {
+  KEY : null,
+  HOST : 'api.getexceptional.com',
+  handle: function (msg,url,line) {
+    if (Exceptional.KEY) {
+      console.log(document)
+      var request = document.createElement('iframe');
+      var protocol_version = 5;
+      var backtrace_string = 'no backtrace';
+      request.style.width   = '1px';
+      request.style.height  = '1px';
+      request.style.display = 'none';
+      var url     = 'http://' + Exceptional.HOST + '/api/errors/new?protocol_version=' + protocol_version + '&msg=' + escape(msg) + '&url=' + escape(url) + '&line=' + escape(line) + '&api_key=' + Exceptional.KEY + '&backtrace=' + backtrace_string;
+      request.src = url;
+      if (document.body) {
+        document.body.appendChild(request);
+      } else{
+        addLoadEvent(function() {
+          document.body.appendChild(request);
+        });
+      };
+      
+    } else{
+      log('Exceptional.KEY is not set!')
+    };
+    return true;
+  },
+  setKey: function (key) {
+    Exceptional.KEY = key;
+  },
+  setHost: function (host) {
+    Exceptional.HOST = host;
+  }
+}
+
+window.onerror = function(msg, url, line) {
+  Exceptional.handle(msg,url,line);
+};
+
+// nice way to register the execution of some code when  the page has finished loading - from http://simonwillison.net/2004/May/26/addLoadEvent/
+function addLoadEvent(func) {
+  var oldonload = window.onload;
+  if (typeof window.onload != 'function') {
+    window.onload = func;
+  } else {
+    window.onload = function() {
+      if (oldonload) {
+        oldonload();
+      }
+      func();
+    }
+  }
+}
+
+// from Paul Irish : http://paulirish.com/2009/log-a-lightweight-wrapper-for-consolelog/
+window.log=function(){log.history=log.history||[];log.history.push(arguments);if(this.console){console.log(Array.prototype.slice.call(arguments))}};