How to create cross-domain request?

In fact, there is nothing to do in Angular2 regarding cross domain requests. CORS is something natively supported by browsers. This link could help you to understand how it works:

To be short, in the case of cross domain request, the browser automatically adds an Origin header in the request. There are two cases:

  • Simple requests. This use case applies if we use HTTP GET, HEAD and POST methods. In the case of POST methods, only content types with the following values are supported: text/plain, application/x-www-form-urlencoded and multipart/form-data.
  • Preflighted requests. When the “simple requests” use case doesn’t apply, a first request (with the HTTP OPTIONS method) is made to check what can be done in the context of cross-domain requests.

So in fact most of work must be done on the server side to return the CORS headers. The main one is the Access-Control-Allow-Origin one.

200 OK HTTP/1.1
Access-Control-Allow-Origin: *

To debug such issues, you can use developer tools within browsers (Network tab).

Regarding Angular2, simply use the Http object like any other requests (same domain for example):

return this.http.get('')
           .map(res => res.json()).subscribe(

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