Angular 2/4如何将多个标头添加到http发布

Question

I've problem with adding additonal headers to html post. with curl works very well like with postman. I can't add Authorization header to post request.

my problem is similar to https://stackoverflow.com/questions/39408413/angular2-http-post-how-to-send-authorization-header

my code:

 getToken(){

let headers = new Headers;
headers.append('Authorization', 'Basic ' + btoa(Spotify.clientId + ':' + Spotify.clientSecret));
headers.append('Content-Type', 'application/x-www-form-urlencoded');

let options = new RequestOptions({ headers: headers });


let params = new URLSearchParams();
params.append('grant_type', 'client_credentials');

 console.log(

  this.http.post(Spotify.tokenUrl, params.toString(), options).subscribe()

)  
}

Now, when I try to get this none of those two headers aren't added

OPTIONS /api/token HTTP/1.1
Host: accounts.spotify.com
Connection: keep-alive
Access-Control-Request-Method: POST
Origin: http://172.21.7.171:4200
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, 
  like Gecko) Chrome/59.0.3071.86 Safari/537.36
Access-Control-Request-Headers: authorization
Accept: */ *
Referer: http://172.21.7.171:4200/
Accept-Encoding: gzip, deflate, br
Accept-Language: pl,en;q=0.8,en-US;q=0.6

But when I comment Authorization header, Content-Type is added and a get invalid_client with error 400

POST /api/token HTTP/1.1
Host: accounts.spotify.com
Connection: keep-alive
Content-Length: 29
Accept: application/json, text/plain, */ *
Origin: http://172.21.7.171:4200
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, 
 like Gecko) Chrome/59.0.3071.86 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Referer: http://172.21.7.171:4200/
Accept-Encoding: gzip, deflate, br
Accept-Language: pl,en;q=0.8,en-US;q=0.6

But when I comment Content-Type header and append Authorization I have the same issue like first time - no added header :/

I'have angular 4.2 - installed and upgraded from ng cli

How to add additonal headers to POST? in Postman this work perfect

===== Edited ==== Thanks for reply, but both solutions don't work

getToken(){

let options = new RequestOptions();
  options.headers = new Headers();
  options.headers.append('Authorization', Spotify.token);
  options.headers.append('Content-Type', 'application/x-www-form-urlencoded')

let params = new URLSearchParams();
params.append('grant_type', 'client_credentials');

 console.log(
  this.http.post(Spotify.tokenUrl, params.toString(), options).subscribe()
) 
}

now if I comment 'Authorization' Content-Type is added to Request with AUthorization i none header isn't added and body isn't sent too

========= edited =========

According to this topic Angular2 - set headers for every request I've created default-request-options.service.ts

import { Injectable } from '@angular/core';
import { BaseRequestOptions, RequestOptions, Headers } from '@angular/http';

@Injectable()
export class DefaultRequestOptions extends BaseRequestOptions {

    private superHeaders: Headers;

    get headers() {
        // Set the default 'Content-Type' header
        this.superHeaders.set('Content-Type', 'application/json');

        const token = localStorage.getItem('authToken');
        if(token) {
            this.superHeaders.set('Authorization', `Bearer ${token}`);
        } else {
            this.superHeaders.delete('Authorization');
        }
        return this.superHeaders;
    }

    set headers(headers: Headers) {
        this.superHeaders = headers;
    }

    constructor() {
        super();

    }
}

export const requestOptionsProvider = { provide: RequestOptions, useClass: DefaultRequestOptions };

in app.module.ts

import { requestOptionsProvider, DefaultRequestOptions } from './default-request-options.service'
...
providers: [
    requestOptionsProvider
  ],

now in my service

import { DefaultRequestOptions } from '../default-request-options.service';
  getToken(){

    let params = new URLSearchParams();
    params.append('grant_type', 'client_credentials');

    let options = new DefaultRequestOptions();
      //options.headers = new Headers();
     // options.headers.append('Authorization', Spotify.basicCode);
      //options.headers.append('Content-Type', 'application/x-www-form-urlencoded');
      // options.body = params.toString();
      // options.method = 'post';

   console.log(
      this.http.post(Spotify.tokenUrl, params.toString(), options).subscribe()
      ) 

  }

And I have errors still :/ Headers aren't added :/

I've made some investigations, tests. When I try send only 'Content-type=application/x-www-form-urlencoded' I get reply with error 'bad client' because I don't send Authorization. Problem occours when I try to add another header with Authorization.

I've made similar with GET method and I can add only 'Authorization' header, none other. If I added for example "X-Authorization" header that GET method is changed to OPTIONS method like in POST :/

In console I get error:

XMLHttpRequest cannot load https://accounts.spotify.com/api/token . Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin ' http://localhost:4200 ' is therefore not allowed access.

Is there any way to provide more in one header in http post request?

I added only Content-Type header with body. I got reply with 400 code because my request was without Authorization header. In firefox I edited this reqest by adding Authorization to headers and I got what I wanted code 200 with token :) So the problem is with Angular not with browser.

==== EDITED ==== Spotify says that i shouldn't use clientid and client+secret. i should use this:

 let options = new RequestOptions()
      options.headers = new Headers();
      options.params = new URLSearchParams();
      options.params.append('client_id', Spotify.clientId);
      options.params.append('redirect_uri', 'http://localhost:4200/callback');
      options.params.append('scope', 'user-read-private user-read-email');
      options.params.append('response_type', 'token');
      options.params.append('state', '789935');

this.http.get('https://accounts.spotify.com/authorize', options )
        .subscribe(
          res=> {
            console.log('res',res)
          }
        )

now i get 200 but callback isnt displayed. in console i have:

XMLHttpRequest cannot load https://accounts.spotify.com/authorize?client_id=2100FakeClientId45688548d5a2b9…scope=user-read-private%20user-read-email&response_type=token&state=789935. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access.

and this comes from "callback:1"

I've made route for callback and callbackComponent

import { Component } from '@angular/core';
// import { AuthService } from './auth.service';

@Component({
  template: `<h2>callback</h2>`
})
export class CallbackComponent {

}

but in console I've error still :/

localhost/:1 XMLHttpRequest cannot load https://accounts.spotify.com/authorize?client_id=21006d1ceeFakeClient548d5a2b9…scope=user-read-private%20user-read-email&response_type=token&state=789935. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access.

but this time this comes from 'localhost/:1

In postman I het full html to redirect. How can I make this redirection in Angular 2

Answer 1

Well, if you are using latest angular HttpClient, it is very easy. See the example.

this.httpClient.post(url, body, {
      headers: new HttpHeaders().set('Authorization', 'Bearer ' + this.getAuthAccessToken())
      .set('Content-Type', 'application/json') 
    })

Hope it helps. Thanks

Answer 2

You can make use of Interceptors to put headers on every request:

This tutorial will help you accomplish that:

https://medium.com/codingthesmartway-com-blog/angular-4-3-httpclient-accessing-rest-web-services-with-angular-2305b8fd654b

Answer 3

you can set header like that

 let options = new RequestOptions();
    options.headers = new Headers();
    options.headers.append('Authorization', 'Basic ' + btoa(Spotify.clientId + ':' + Spotify.clientSecret));
    options.headers.append('Content-Type', 'application/x-www-form-urlencoded');

Also, in Angular 5 new class introduce so you can set easily

header = new HttpHeaders();
header.set('Content-Type', 'application/x-www-form-urlencoded');

Answer 4

What I do and works is that

  this.options = new RequestOptions({
    headers: new Headers({
      'header1': 'value1',
      // And more
    })
  });

And I use this.options in my requests.

Hope this helps you

Answer 5

One way to add multiple headers to http post without using new Headers() would be the following:

$http.post(url, entity, {
    headers: {
      customHeader1: customHeader1Value,
      customHeader2: customHeader2Value
    }
  }).then(...

I hope it helps.