POST /auth HTTP/1.1
Host: localhost:8080
Connection: keep-alive
Content-Length: 39
Pragma: no-cache
Cache-Control: no-cache
Accept: application/json, text/plain, */*
Origin: http://localhost:4200
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36
content-type: text/plain
Referer: http://localhost:4200/login
Accept-Encoding: gzip, deflate, br
Accept-Language: en-GB,en-US;q=0.8,en;q=0.6

Accept:*/*
Accept-Encoding:gzip, deflate, sdch, br
Accept-Language:en-GB,en-US;q=0.8,en;q=0.6
Access-Control-Request-Headers:content-type
Access-Control-Request-Method:POST
Cache-Control:no-cache
.
.

import { Injectable } from '@angular/core';
import { Http, Headers, Response, RequestOptions, RequestMethod } from '@angular/http';
import { Observable } from 'rxjs';
import 'rxjs/add/operator/map'

@Injectable()
export class AuthenticationService {
 public token: string;

constructor(private http: Http) {

}

login(username: string, password: string): Observable<boolean> {
    let head = new Headers({ 'Content-Type': 'application/json' });
    return this.http.post('http://localhost:8080/auth', JSON.stringify({ username: username, password: password }),{ headers: head})
        .map((response: Response) => {
            // login successful if there's a jwt token in the response
            let token = response.json() && response.json().token;
            console.log(response);

        });
}