angular5 httpclient的示例實戰

import { Injectable } from '@angular/core';
import { HttpClient, HttpResponse } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import { HttpDefaultOptions } from './http.default.options';

@Injectable()
export class Service {

 private static METHOD_DELTE = 'DELETE';
 private static METHOD_POST = 'POST';
 private static METHOD_GET = 'GET';
 private static METHOD_PUT = 'PUT';

 constructor(private httpClient: HttpClient) {
 }

 /**
  * 將數據上傳
  * @param data
  * @param {Function} func
  */
 uploadDataPost(data: any, func: Function) {
  let url = '/api/test';
  this.apiPost(url, data)
   .subscribe((response: HttpResponse) => {
    func(response);
   }, error => {
    func(undefined);
   });
 }

 /**
  * 返回json 格式的obj 對象
  * @param url
  * @param body
  * @param urlSearchParams
  * @returns {Observable<{}>}
  */
 apiPost(url, body, urlSearchParams?: any): Observable<{}> {
  let options = {
   body: body ? body : null,
   params: urlSearchParams,
   responseType: 'json'
  };
  return this.httpClient.request(Service.METHOD_POST, url, options);
 }

 /**
  * 返回一個obj 對象
  * @param url
  * @param urlSearchParams url 的查詢參數
  * @returns {Observable<{}>}
  */
 apiGet(url, urlSearchParams?: any): Observable<{}> {
  let options = {
   params: urlSearchParams,
   responseType: 'json'
  };
  return this.httpClient.request(Service.METHOD_GET, url, options);
 }
}