[WIP]Add special url flag for the authentication via social networks in iframe

[LavrovArtem]

related with #1428

[testcafe-build-bot]

❌ Tests for the commit 5c75186 have failed. See details:

• ✅ continuous-integration/travis-ci/push

• ❌ continuous-integration/appveyor/branch.

[LavrovArtem]

This PR is unnecassary because the x-frame-options header can be replaced via the Request Hooks feature.

[gbatz]

Hi @LavrovArtem
Could you please share how exactly can the x-frame-options header be replaced via Request Hooks?
I implemented the hook, it fires up for my specific request, but still that header seems to be unaffected.
I'm using your workaround for Facebook Login popup. Setting the 'x-frame-options': skip, in header-transforms works good, but I don't want to keep locally that change in node_modules.
Thanks!

[LavrovArtem]

Hi @gbatz,
For your scenario, you should use the _onConfigureResponse method. Unfortunately, it is not documented. The event object has the setHeader (name, value) and removeHeader (name) methods. For example:

class MyRequestHook extends RequestHook {
    constructor (requestFilterRules, responseEventConfigureOpts) {
        super(requestFilterRules, responseEventConfigureOpts);
    }
    onRequest (event) {
    }
    onResponse (event) {
    }
    _onConfigureResponse (event) {
        event.removeHeader('x-frame-options');
    }
}

[gbatz]

Thanks @LavrovArtem for your quick response! That worked like a charm!
I can only hope, still, that new window popups will be supported by testcafe in the near future. There's still lots of other pain with this.
Thanks for your hard work!