如何以角度向 httpRequest 添加自定义标头

Question

我试图做一个http get()通过传递某些请求values中headers，现在我更换headers这样的：

import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Injectable } from '@angular/core';
import {ICustomer} from 'src/app/models/app-models';

@Injectable({
  providedIn: 'root'
})
export class MyService {
private baseUrl = '....api url....';
public authKey = '....auth_key......';

  constructor(private http: HttpClient) { }

  public async AllCustomers(): Promise<ICustomer[]> {
   const apiUrl = `${this.baseUrl}/customers`;

   return this.http.get<ICustomer[]>(apiUrl ,
    {headers: new HttpHeaders({Authorization: this.authKey})}).toPromise();<=====
  }

}

当我像这样替换标题时：

headers: new HttpHeaders({Authorization: this.authKey})

默认标头值（即 Content-Type : application/json）将被上述标头替换。

我没有替换标题如何添加custom headers，而是像这样尝试：

  public async AllCustomers(): Promise<ICustomer[]> {
    const apiUrl = `${this.baseUrl}/courses`;
    const headers = new HttpHeaders();
    headers.append('Authorization', this.authKey);
    headers.append('x-Flatten', 'true');
    headers.append('Content-Type', 'application/json');

    return this.http.get<ICustomer[]>(apiUrl).toPromise();
  }

我的方法有什么问题，我是新手angular，有什么帮助吗？

Answer 1

您应该像这样将标头添加到您的获取请求中。此外，由于 HttpHeaders 是不可变对象，因此您必须重新分配标头对象

  public async AllCustomers(): Promise<ICourses[]> {
    const apiUrl = `${this.baseUrl}/courses`;
    let headers = new HttpHeaders();
    headers = headers.append('Authorization', this.authKey);
    headers = headers.append('x-Flatten', 'true');
    headers = headers.append('Content-Type', 'application/json');

    return this.http.get<ICourses[]>(apiUrl, {headers}).toPromise();
  }