diff --git a/src/common/xhrInterceptorUtils.js b/src/common/xhrInterceptorUtils.js
new file mode 100644
index 0000000..baa2bd3
--- /dev/null
+++ b/src/common/xhrInterceptorUtils.js
@@ -0,0 +1,41 @@
+import xhrInterceptors from './xhrInterceptors.json5';
+
+export {xhrInterceptors};
+
+export function matchInterceptors(interceptFilter, url) {
+  return xhrInterceptors.interceptors.filter(interceptor => {
+    var regex = new RegExp(interceptor.urlRegex);
+    return interceptor.intercepts == interceptFilter && regex.test(url);
+  });
+}
+
+export function getResponseJSON(xhr) {
+  if (xhr.responseType === 'arraybuffer') {
+    var arrBuffer = xhr.response;
+    if (!arrBuffer) {
+      console.error('No array buffer.');
+      return undefined;
+    }
+    var byteArray = new Uint8Array(arrBuffer);
+    var dec = new TextDecoder('utf-8');
+    var rawResponse = dec.decode(byteArray);
+    return JSON.parse(rawResponse);
+  }
+  if (xhr.responseType === 'text' || xhr.responseType === '')
+    return JSON.parse(xhr.responseText);
+  if (xhr.responseType === 'json') return xhr.response;
+
+  console.error(
+      'Unexpected responseType ' + xhr.responseType + '. Request url: ',
+      xhr.$TWPTRequestURL);
+  return undefined;
+}
+
+export function triggerEvent(eventName, body) {
+  var evt = new CustomEvent('TWPT_' + eventName, {
+    detail: {
+      body,
+    }
+  });
+  window.dispatchEvent(evt);
+}