feat(client): allow sock port to use location's port (#2341)

Author: jkrehm

client-src/default/utils/createSocketUrl.js

@@ -76,7 +76,11 @@ function getSocketUrl(urlParts, loc) {
   // they are not provided
   const sockHost = query.sockHost || hostname;
   const sockPath = query.sockPath || '/sockjs-node';
-  const sockPort = query.sockPort || port;
+  let sockPort = query.sockPort || port;
+
+  if (sockPort === 'location') {
+    sockPort = loc.port;
+  }
 
   return url.format({
     protocol,

test/client/utils/createSocketUrl.test.js

@@ -141,6 +141,16 @@ describe('createSocketUrl', () => {
       'http://localhost',
       'http://localhost:8097/sockjs-node',
     ],
+    [
+      '?http://example.com:8096&sockPort=location',
+      'http://something.com',
+      'http://example.com/sockjs-node',
+    ],
+    [
+      '?http://0.0.0.0:8096&sockPort=location',
+      'http://localhost:3000',
+      'http://localhost:3000/sockjs-node',
+    ],
   ];
   samples3.forEach(([scriptSrc, loc, expected]) => {
     test(`should return socket ${expected} for query ${scriptSrc} and location ${loc}`, () => {