Resolving polling URL

Hi all, My gulp task is setup with the bare-bones browser-sync instance within a WordPress site:

gulp.task 'browser-sync', -> browserSync() return

I’m not able to use the proxy option due to this being a multisite install – so I went the route of adding the following right before </body>:

/**
 * Add inline browsersync function for live reloads locally only to wp_footer()
 * @return void
 */
function bt_browsersync() { ?>
    <script type='text/javascript' id="__bs_script__">//<![CDATA[
    document.write("<script async src='http://HOST:3000/browser-sync/browser-sync-client.2.7.12.js'><\/script>".replace("HOST", location.hostname));
//]]></script>
<?php }
add_action('wp_footer', 'bt_browsersync', 9999);

I’m not able to use HOST as the variable here though, because the file is not available going through http://wpsite.dev:3000/browser-sync/browser-sync-client.2.7.12.js and only works by going to local:3000/browser-sync/browser-sync-client.2.7.12.js, so I changed the above to the following:

/**
 * Add inline browsersync function for live reloads locally only to wp_footer()
 * @return void
 */
function bt_browsersync() { ?>
    <script type='text/javascript' id="__bs_script__">//<![CDATA[
    document.write("<script async src='http://localhost:3000/browser-sync/browser-sync-client.2.7.12.js'><\/script>");
//]]></script>
<?php }
add_action('wp_footer', 'bt_browsersync', 9999);

The problem now is that when browsersync is polling the page, it is using the site URL to reference the GET request, so I get these console errors:

http://wpsite.dev:3000/browser-sync/socket.io/?EIO=3&transport=polling&t=1434574564882-43 net::ERR_CONNECTION_REFUSED

How can I set those URLs to use localhost in this case as well? I looked into scriptPath, but that did not change anything. Thanks!

Note

I am running the install through Vagrant.

[shakyShane]

Please see https://github.com/BrowserSync/browser-sync/issues/690

tl;dr

socket: {
    domain: "localhost:3000"
}

[shakyShane]

You can alter the domain for websockets via

// This will result in something like this in
// the socket connector code
// browserSync.io('localhost:3003/browser-sync')
socket: {
    namespace: function (namespace) {
        return "localhost:3003" + namespace;
    }
}

http://www.browsersync.io/docs/options/#option-socket