Cannot get post working in Angular2 - node.js

Question

So i'm trying to authenticate in my angular application. I attended headers and created an stringified body. I also looked at serveral other forum post about sending post requests in postman but i cannot get it working.
getToken()
{
console.log('started getting of token');
//get username and password from local storage
//Send username and password via body
let headers = new Headers();
let body = JSON.stringify({
name: 'test',
password: 'test'
});
headers.append('Content-Type', 'application/x-www-form-urlencoded');
this.jwt = this.http.post('http://localhost:8080/api/authenticate/', {
headers: headers,
body: body
}).map(res => res.text()).subscribe(data => console.log(data));
}
So above is my code. I know it might be a little silly thing but I cannot get it working.
I get the error that the user cannot be found. That happens when the username is wrong, and when the username does not exsist in the database. So that a little extra tricky as well.
Who knows what the stupid mistake is that I made?

Answer 1

Add this code in your service.ts file.
import { Http, URLSearchParams} from '#angular/http';
getToken()
{
let headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
let body = new URLSearchParams();
body.set('name', test);
body.set('password', test);
return this.http.post("http://localhost:8080/api/authenticate/", body, headers).map(response => response.json());
}

Answer 2

Use following code to send post request
this.jwt = this.http.post('http://localhost:8080/api/authenticate/',body,headers).map(res => res.text()).subscribe(data => console.log(data));

Answer 3

This code is what I use for post request
send_request_post(url: String, data:{})
{
var headerPost = new Headers
({
'Content-Type' : 'application/json ;charset=utf-8'
})
return this.http.post(url, JSON.stringify(data), {headers: headerPost})
.toPromise()
.then
(
response =>
{
console.log(response);
}
)
}