No-schema publicPath url no longer works

[tamouse]

Do you want to request a feature or report a bug?

Bug

What is the current behavior?

v2.6.1 allowed the use of an anonymous schema for the publicPath setting for the dev server, e.g. //localhost:8080/webpack/. This is not working in v2.7.0.

With v2.7.0, the client is getting the following errors:

2VM16080:1 GET http://localhost:3808//localhost:3808/webpack/sockjs-node/info?t=1502221718607 404 (Not Found)
(anonymous) @ VM16080:1
AbstractXHRObject._start @ abstract-xhr.js?96d9:132
(anonymous) @ abstract-xhr.js?96d9:21
2:1 XMLHttpRequest cannot load http://localhost:3808//localhost:3808/webpack/sockjs-node/info?t=1502221718607. The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'http://shasta.lvh.me:3000' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

The path is clearly incorrect.

Modifying config.output.publicPath to add the schema, http://localhost:8080/webpack/ does not fix the problem with CORS:

2VM17313:1 GET http://localhost:3808/webpack/sockjs-node/info?t=1502221853716 404 (Not Found)
(anonymous) @ VM17313:1
AbstractXHRObject._start @ VM17382:132
(anonymous) @ VM17382:21
2:1 XMLHttpRequest cannot load http://localhost:3808/webpack/sockjs-node/info?t=1502221853716. The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'http://shasta.lvh.me:3000' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
2VM17313:1 GET http://localhost:3808/webpack/sockjs-node/info?t=1502221855787 404 (Not Found)
(anonymous) @ VM17313:1
AbstractXHRObject._start @ VM17382:132
(anonymous) @ VM17382:21

The config section is:

config.devServer = {
    port: devServerPort,
    disableHostCheck: true,
    headers: { 'Access-Control-Allow-Origin': '*' }
  };
  config.output.publicPath = '//localhost:' + devServerPort + '/webpack/';
  // Source maps
  config.devtool = 'cheap-module-eval-source-map';

Full config: https://gist.github.com/tamouse/0fe62da01b27e747ecd9a4d0326edc23

If the current behavior is a bug, please provide the steps to reproduce.

Upgrade from v2.6.1 to v2.7.0

What is the expected behavior?

No change between v2.6.1 and v2.7.0

Please mention your webpack and Operating System version.

Webpack: 2.6.1
MacOS: 10.12.6

[renchap]

Is it working with 2.7.1?

[tamouse]

@renchap i'll try it, i didn't see that in the releases

[tamouse]

@renchap It is working as expected in v2.7.1, no config changes, thank you