support self hosted microsoft

lib/utils.js

@@ -106,6 +106,11 @@ const createRivaClient = async(rivaUri) => {
   return client;
 };
 
+const isValidHttpOrWsUrl = (url) => {
+  const pattern = new RegExp('^(https?:\/\/|wss?:\/\/)');
+  return !!url.match(pattern);
+}
+
 
 module.exports = {
   makeSynthKey,
@@ -117,5 +122,6 @@ module.exports = {
   createRivaClient,
   makeBasicAuthHeader,
   NUANCE_AUTH_ENDPOINT,
-  noopLogger
+  noopLogger,
+  isValidHttpOrWsUrl
 };