Filter out CDATA tag for RSS feeds (#691)

* add cdata regex

* remove cdata via regex

* add trailing comma

* fix no-useless-escape

* switch let to const

server/services/feedService.js

@@ -6,6 +6,7 @@ const BaseService = require('./BaseService');
 const client = require('../models/client');
 const config = require('../../config');
 const Feed = require('../models/Feed');
+const regEx = require('../../shared/util/regEx');
 
 class FeedService extends BaseService {
   constructor() {
@@ -163,6 +164,13 @@ class FeedService extends BaseService {
 
     // If there are no enclosures, then use the link tag instead
     if (feedItem.link) {
+      // remove CDATA tags around links
+      const cdata = regEx.cdata.exec(feedItem.link);
+
+      if (cdata && cdata[1]) {
+        return [cdata[1]];
+      }
+
       return [feedItem.link];
     }
 

shared/util/regEx.js

@@ -1,6 +1,7 @@
 const regEx = {
   url: /^(?:https?|ftp):\/\/.{1,}\.{1}.{1,}/,
   domainName: /(?:https?|udp):\/\/(?:www\.)?([-a-zA-Z0-9@:%._+~#=]{2,256}\.[a-z]{2,18}\b)*(\/[/\d\w.-]*)*(?:[?])*(.+)*/i,
+  cdata: /<!\[CDATA\[(.*?)\]\]>/,
 };
 
 module.exports = regEx;