response handler add

Author: nikitaeverywhere

package.json

@@ -1,7 +1,7 @@
 {
   "name": "LightPivotTable",
   "author": "ZitRo",
-  "version": "1.0.0-beta.18",
+  "version": "1.0.0-beta.19",
   "description": "A lightweight pivot table for MDX2JSON source for InterSystems Cache",
   "main": "test/testServer.js",
   "repository": {

readme.md

@@ -53,6 +53,7 @@ var setup = { // Object that contain settings. Properties in brackets can be mis
             , back: function ({Object { level: {number} }}) {}
             // if cellDrillThrough callback returns boolean false, DrillThrough won't be performed.
             , cellDrillThrough: function ({Object { event: {event}, filters: {string[]}, cellData: {object} }}) {}
+            , responseHandler: function ({Object {url: {string}, status: {number}}}) {}
         } ]
         [ , pagination: 30 ] // Maximum rows number on one page (default: 200, turn off: 0)
         [ , hideButtons: true ] // hides "back" and "drillThrough" buttons

source/js/DataSource.js

@@ -39,10 +39,21 @@ var DataSource = function (config, globalConfig, lpt) {
  * @private
  */
 DataSource.prototype._post = function (url, data, callback) {
-    var xhr = new XMLHttpRequest();
+    var xhr = new XMLHttpRequest(),
+        self = this;
     xhr.open("POST", url);
     if (this.SEND_COOKIES) xhr.withCredentials = true;
     xhr.onreadystatechange = function () {
+        var handler;
+        if (xhr.readyState === 4) {
+            handler = self.LPT.CONFIG.triggers["responseHandler"];
+            if (typeof handler === "function") {
+                handler.call(self.LPT, {
+                    url: url,
+                    status: xhr.status
+                });
+            }
+        }
         if (xhr.readyState === 4 && xhr.status === 200) {
             callback((function () {
                 try {