Add the snapshot endpoint to web.py and have the phantomjs running only load the page's HTML once there are no further pending XHR requests

util/phantomjs-runner.js

@@ -0,0 +1,37 @@
+var system = require('system');
+var url = system.args[1] || '';
+if(url.length > 0) {
+  var page = require('webpage').create();  
+  page.open(url, function (status) {
+    if (status == 'success') {     
+      var delay, checker = (function() {
+        var html = page.evaluate(function () {
+          var found = document.getElementsByTagName('html')[0].outerHTML || '';
+          if (window.__isLoading && !window.__isLoading()) {
+            return found;
+          }
+          if (found.indexOf('404 Not Found') > 0) {
+            return found;
+          }
+          return null;
+        });
+
+        if (html) {
+          if (html.indexOf('404 Not Found') > 0) {
+            console.log('Not Found');
+            phantom.exit();
+            return;
+          }
+
+          clearTimeout(delay);
+          console.log(html);
+          phantom.exit();
+        }
+      });
+      delay = setInterval(checker, 100);
+    } else {
+      console.log('Not Found');
+      phantom.exit();
+    }
+  });
+}