Angular2 – 为每个请求设置标头

import {Headers} from 'angular2/http';
var headers = new Headers();
headers.append(headerName,value);

// HTTP POST using these headers
this.http.post(url,data,{
  headers: headers
})
// do something with the response

HTTP拦截器在Angular 2中不支持，但在Angular Github： https://github.com/angular/angular/issues/2684中有一个有趣的讨论。

回答，你的问题，你可以提供一个服务，包装来自Angular2的原始Http对象。下面描述的东西。

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

@Injectable()
export class HttpClient {

  constructor(private http: Http) {}

  createAuthorizationHeader(headers: Headers) {
    headers.append('Authorization','Basic ' +
      btoa('username:password')); 
  }

  get(url) {
    let headers = new Headers();
    this.createAuthorizationHeader(headers);
    return this.http.get(url,{
      headers: headers
    });
  }

  post(url,data) {
    let headers = new Headers();
    this.createAuthorizationHeader(headers);
    return this.http.post(url,{
      headers: headers
    });
  }
}

而不是注入Http对象，你可以注入这一个(HttpClient)。

import { HttpClient } from './http-client';

export class MyComponent {
  // Notice we inject "our" HttpClient here,naming it Http so it's easier
  constructor(http: HttpClient) {
    this.http = httpClient;
  }

  handleSomething() {
    this.http.post(url,data).subscribe(result => {
        // console.log( result );
    });
  }
}

我也认为可以做一些事情可以使用mult提供程序为Http类提供您自己的类扩展Http一个…查看此链接：http://blog.thoughtram.io/angular2/2015/11/23/multi-providers-in-angular-2.html。

希望它帮助你，Thierry