Retrieve service worker registration from homepage

Author: JuanAr

lib/serviceWorkerTools.js

@@ -1,6 +1,8 @@
 'use strict';
 
 var path = require('path'),
+    cheerio = require('cheerio'),
+    request = require('request'),
     Q = require('q');
 
 function getAssetsFolders(ids, callback) {
@@ -18,6 +20,24 @@ function getAssetsFolders(ids, callback) {
   return Q.resolve(results).nodeify(callback);
 }
 
+function getServiceWorkersFromUrl (siteUrl, callback) {
+  var deferred = Q.defer();
+  request({ uri: siteUrl }, function (err, response, body) {
+    if (err || response.statusCode !== 200) {
+      return deferred.reject(new Error('Failed to retrieve service workers from site.'));
+    }
+
+    var $ = cheerio.load(body);
+    var scriptContent = $($('script')).text();
+    var serviceWorkers = scriptContent.match(/navigator\.serviceWorker\.register\([\s\S]*?\)/);
+
+    return deferred.resolve(serviceWorkers);
+  });
+
+  return deferred.promise.nodeify(callback);
+}
+
 module.exports = {
   getAssetsFolders: getAssetsFolders,
+  getServiceWorkersFromUrl: getServiceWorkersFromUrl
 };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pwabuilder-lib",
-  "version": "2.0.0-rc.6",
+  "version": "2.0.0-rc.7",
   "description": "PWA Builder Core Library",
   "repository": {
     "type": "git",