http - How to get value in Response header Angular2

Question

i want to get session token in response header(Set-Cookie).how can i access values in Response header ?

var headers = new Headers();
            headers.append('Content-Type', 'application/json');
            console.log('url',this.loginUrl)
            this.http.post(this.loginUrl,
                JSON.stringify({ "username": value.username, "password": value.password }),
                { headers: headers })
                .map((res: Response) => 
                    res.json())
                .subscribe((res) => {
                    console.log("res", res);
                    this.loading.hide();
                    if (res.message_code == "SUCCESS") {
                        this.nav.setRoot(HomePage, {
                            username: value.username,
                        });
                    } else {
                        let alert =  Alert.create({
                            title: "Sign In Error !",
                            subTitle: 'Please Check Username or Password.',
                            buttons: ['Ok']
                        });
                        this.nav.present(alert);
                    }
                }, err => {
                    this.loading.hide();
                    console.log('error', err);

                }); 

this is my header response

Answer 1

The problem is that you map your response to its json content. Headers can be reached from the response itself. So you need to remove the map operator:

this.http.post(this.loginUrl,
       JSON.stringify({ "username": value.username, "password": value.password }),
       { headers: headers })
        /*.map((res: Response) =>  // <--------------
                res.json())*/
       .subscribe((res) => {
         var payload = res.json();
         var headers = res.headers;

         var setCookieHeader = headers.get('Set-Cookie')
         (...)
       });

Be careful with CORS with accessing the response headers. See this question:

• angular2/http get location header of 201 response