向Angular HttpClient添加一个HTTP头并不会发送这个头，为什么?

这是我的代码:

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.');
            }
        }
    );
}

这里是网络调试:

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

和数据存储在“请求有效载荷”，但在我的服务器没有收到POST值:

print_r($_POST);
Array
(
)

我相信错误来自于在POST期间没有设置头，我做错了什么?

当前回答

要添加多个参数或头，您可以执行以下操作:

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 })

2017-11-11 22:20:56

其他回答

在我的遗留应用中，prototype js的Array.from与angular的Array.from冲突导致了这个问题。我通过保存angular的Array.from version并在原型加载后重新分配它来解决这个问题。

2019-01-31 23:26:49

要添加多个参数或头，您可以执行以下操作:

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 })

2017-11-11 22:20:56

我也在和这个斗争。我使用了一个拦截器，它捕获响应头，然后克隆头(因为头是不可变的对象)，然后发送修改后的头。https://angular.io/guide/http#intercepting-requests-and-responses

2021-02-22 10:08:00

在HTTP请求中像下面这样设置HTTP报头

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

2017-12-20 04:26:23

我用的是Angular 8，唯一对我有用的是:

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

2019-10-12 11:03:12

向Angular HttpClient添加一个HTTP头并不会发送这个头，为什么?

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