在可观察的角度http中传递标题

Question

how to pass headers in http post request.

 import { Http, Response } from '@angular/http'; import { HttpHeaders } from '@angular/common/http'; import { Observable } from 'rxjs'; import { map, catchError } from 'rxjs/operators'; getStreamingURL(): Observable<any> { const headers: HttpHeaders = new HttpHeaders({ 'deviceType': 'pc', 'os': 'web' }); const options = { 'headers': headers }; return this.http.post( environment.apiUrl + '/livetv/apis/v1.0/stream', { 'channelId': 142 }, options ).pipe(map((res) => { return res.json(); })); } 

Answer 1

a simplified version:

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

const headers: HttpHeaders = new HttpHeaders({
            'deviceType': 'pc',
            'os': 'web'
        });

const options = new RequestOptions({ headers: headers });

return this.http.post(urlToPass, options);

Answer 2

Try this way

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

// While call any API.

return new Observable<any>(observer => {
let headers = new HttpHeaders({
    'deviceType': 'pc',
    'os': 'web'
  });
  let options = {
    headers: headers
  }

 this.http.post(URL, param, options)
        .subscribe(data => {
            console.log(data);
         });
});