Add CORS capability to Flask

Add static blog demo files

demo/public/js/cosysnode.js

@@ -0,0 +1,43 @@
+// Released under Apache license
+// Copyright (c) 2015 Yannic ARNOUX
+
+// Create the XHR object.
+function createCORSRequest(method, url) {
+  var xhr = new XMLHttpRequest();
+  if ("withCredentials" in xhr) {
+    // XHR for Chrome/Firefox/Opera/Safari.
+    xhr.open(method, url, true);
+  } else if (typeof XDomainRequest != "undefined") {
+    // XDomainRequest for IE.
+    xhr = new XDomainRequest();
+    xhr.open(method, url);
+  } else {
+    // CORS not supported.
+    xhr = null;
+  }
+  return xhr;
+}
+
+function cosysload() {
+  var url = 'http://cosysnode.madyanne.fr:3000/comments';
+  var xhr = createCORSRequest('GET', url);
+  if (!xhr) {
+    alert('CORS not supported');
+    return;
+  }
+
+  // Response handlers.
+  xhr.onload = function() {
+    var jsonResponse = JSON.parse(xhr.responseText);
+    var template = document.getElementById('template').innerHTML;
+    var rendered = Mustache.render(template, jsonResponse);
+    document.getElementById('cosys-comments').innerHTML = rendered;
+  };
+
+  xhr.onerror = function() {
+    alert('Woops, there was an error making the request.');
+  };
+
+  xhr.send();
+}
+window.onload = cosysload;