Angular5 如何向HTTP请求5添加自定义头？

如何使用angular5向http请求添加自定义头？ 我试过这样的东西

        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

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您可以参考以下自定义标题示例：

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


@Injectable()
export class AbcService {

  constructor(private http: Http) { }

  search = (query) => {
    let headers = new Headers();
    headers.append('Api-User-Agent', 'Example/1.0');
    let apiUrl: string = 'https://en.wikipedia.org/w/api.phpgsrsearch='+query;

return this.http
        .get(apiUrl, headers)
        .map(response => response.json());
  }
}

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可能会解决你的问题：我会检查这个。谢谢：这可能会有帮助