[angular] Angular HttpClient에 HTTP 헤더를 추가해도 헤더가 전송되지 않습니다. 왜 그렇습니까?

내 코드는 다음과 같습니다.

import { HttpClient, HttpErrorResponse, HttpHeaders } from '@angular/common/http';

logIn(username: string, password: string) {
    const url = 'http://server.com/index.php';
    const body = JSON.stringify({username: username,
                                 password: password});
    const headers = new HttpHeaders();
    headers.set('Content-Type', 'application/json; charset=utf-8');
    this.http.post(url, body, {headers: headers}).subscribe(
        (data) => {
            console.log(data);
        },
        (err: HttpErrorResponse) => {
            if (err.error instanceof Error) {
                console.log('Client-side error occured.');
            } else {
                console.log('Server-side error occured.');
            }
        }
    );
}

그리고 여기 네트워크 디버그 :

Request Method:POST
Status Code:200 OK
Accept:application/json, text/plain, */*
Accept-Encoding:gzip, deflate
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:keep-alive
Content-Length:46
Content-Type:text/plain

데이터가 ‘요청 페이로드’에 저장되었지만 내 서버에 POST 값이 수신되지 않았습니다.

print_r($_POST);
Array
(
)

POST 중에 설정되지 않은 헤더에서 오류가 발생했다고 생각합니다. 무엇을 잘못 했습니까?

답변

let headers = new HttpHeaders();
headers = headers.set('Content-Type', 'application/json; charset=utf-8');

const headers = new HttpHeaders({'Content-Type':'application/json; charset=utf-8'});

let headers = new HttpHeaders();
headers = headers.set('h1', 'v1').set('h2','v2');

const headers = new HttpHeaders({'h1':'v1','h2':'v2'});

http.get('someurl',{
   headers: {'header1':'value1','header2':'value2'}
});

constructor(private _http: HttpClient) {}

//....

const url = `${environment.APP_API}/api/request`;

let headers = new HttpHeaders().set('header1', hvalue1); // create header object
headers = headers.append('header2', hvalue2); // add a new header, creating a new object
headers = headers.append('header3', hvalue3); // add another header

let params = new HttpParams().set('param1', value1); // create params object
params = params.append('param2', value2); // add a new param, creating a new object
params = params.append('param3', value3); // add another param 

return this._http.get<any[]>(url, { headers: headers, params: params })

return this.http.get(url, { headers: new HttpHeaders({'Authorization': 'Bearer ' + token})
 });

let headers = new HttpHeaders();
headers = headers.append('key', 'value');

let headers = new HttpHeaders().append('key', 'value');

let headers = new HttpHeaders();
let headers1 = headers.append('key', 'value');

  getCustomHeaders(): HttpHeaders {
    const headers = new HttpHeaders()
      .set('Content-Type', 'application/json')
      .set('Api-Key', 'xxx');
    return headers;
  }

 이것을 돌려줍니다 .http.get (url, {headers : new HttpHeaders (). set ( 'UserEmail', email)});