Angular6将http封装成promise返回

Angular6使用@angular/common/http  下的HttpClient

http.service.ts

import { Injectable } from "@angular/core"; import { HttpClient, HttpHeaders, HttpParams } from "@angular/common/http"; let baseUrl = "your base URL"; const options = { headers: new HttpHeaders() } @Injectable() export class HttpRequestService { constructor(private http: HttpClient) { } public async doRequest(params: any) { if (params['url'] == '' || params['url'] == undefined) { throw (new Error('request url is missing')); } if (params['method'] == 'post' || params['method'] == 'POST') { return await this.doPost(params); } else if (params['method'] == 'patch' || params['method'] == 'PATCH') { return await this.doPatch(params); } else if (params['method'] == 'get' || params['method'] == 'GET') { return await this.doGet(params); } else if (params['method'] == 'delete' || params['method'] == 'DELETE') { return await this.doDelete(params); } else if (params['method'] == 'put' || params['method'] == 'PUT') { return await this.doPut(params); } } public async doPost(params) { let url = baseUrl + params['url']; return await this.http.post(url, params['data'], options).toPromise() } public async doPatch(params) { let url = baseUrl + params['url']; return await this.http.patch(url, params['data'], options).toPromise() } public async doGet(params) { let url = baseUrl + params['url']; let requestOption = {}; if (params['data'] != undefined) { requestOption['params'] = new HttpParams({ fromObject: params["data"] }); } if (params['response'] != undefined) { requestOption["responseType"] = params["response"]; } requestOption["headers"] = new HttpHeaders(); return await this.http.get(url, requestOption).toPromise() } public async doDelete(params) { let url = baseUrl + params['url']; let requestOption = {}; if (params['data'] != undefined) { requestOption['params'] = new HttpParams({ fromObject: params["data"] }); } requestOption["headers"] = new HttpHeaders(); return await this.http.delete(url, requestOption).toPromise() } public async doPut(params) { let url = baseUrl + params['url']; return await this.http.put(url, params['data'], options).toPromise() } }

使用方法,在要是用的类中注册服务，加到providers列表中

import { Injectable } from "@angular/core"; import { HttpRequestService } from "./http.service"; @Injectable() export class XService{ constructor(private httpRequest: HttpRequestService){} test(){ let url = "/test"; let params = {method: "post", url: url, data: {"name": "zhang"}} return this.httpRequest.doRequest(params) } }