1.需求

现在一些数据源 ，需要从三方地址拿到一些数据 比如说电影列表 信息了 影院列表信息了 等一些展示的数据，但是人家这种东西 害需要使用 appkey appserect 这种验签

这种需求 你前端调用接口是直接调用不了的 因为需要用到验签 需要后端接口转接一下 前端再去调用接口

import { Body, Config, Provide } from '@midwayjs/decorator';
import { Inject } from '@midwayjs/decorator';
import { BusinessStudentEntity } from '../entity/student';
import { BusinessUserEntity } from '../entity/user';
import { BusinessBaseConfigEntity } from '../entity/base/config';
import { InjectEntityModel } from '@midwayjs/typeorm';
import { Repository } from 'typeorm';import { BaseService } from '@cool-midway/core';
import * as request from 'request';
import * as _ from 'lodash';
import * as crypto from 'crypto';
import { Context } from '@midwayjs/koa';/*** http请求封装*/
@Provide()
export class BussinessRequestService extends BaseService {@Inject()ctx: Context;@InjectEntityModel(BusinessStudentEntity)businessStudentEntity: Repository<BusinessStudentEntity>;@InjectEntityModel(BusinessBaseConfigEntity)businessBaseConfigEntity: Repository<BusinessBaseConfigEntity>;@InjectEntityModel(BusinessUserEntity)businessUserEntity: Repository<BusinessUserEntity>;@Config('module.business')coolConfig;/*** post*/async post(url, data = {}) {const { userId } = this.ctx.clientInfo;//学员信息const studentInfo = await this.businessStudentEntity.findOneBy({id: userId,});//对应 导员信息const adminInfo = await this.businessBaseConfigEntity.findOneBy({userId: String(studentInfo?.userId),});const requestConfig = this.coolConfig.request;let time = new Date().getTime();let pararm = {};pararm['appId'] = adminInfo.liangPiaoAppId;pararm['timestamp'] = time;let sign = this.generateSignature(pararm,data,adminInfo.liangPiaoSecret,adminInfo.liangPiaoAppId);return new Promise((resolve, reject) => {var option = {url:requestConfig.base_url +url +`?appId=${adminInfo.liangPiaoAppId}&sign=${sign}&timestamp=${time}`,method: 'POST',json: true,timeout: 30000,headers: {'content-type': 'application/json',},body: data,};request(option, function (error, response, body) {if (!error && response.statusCode == 200) {const { state, data } = body;if (state === 200) {resolve(data);} else {reject(body);}} else {reject(error); // 返回错误信息}});});}/*** get*/// get(url, params = {}) {//   const requestConfig = this.mangoConfig.request;//   params['appId'] = requestConfig.appKey;//   params['timestamp'] = new Date().getTime();//   params['sign'] = this.generateSignature(//     params,//     requestConfig.appSecret,//     requestConfig.appKey,//     params['timestamp']//   );//   return new Promise((resolve, reject) => {//     var option = {//       url: requestConfig.base_url + url,//       method: 'GET',//       timeout: 30000,//       qs: params,//     };//     request(option, function (error, response, body) {//       if (!error && response.statusCode == 200) {//         const { code, data } = body;//         if (code === 1) {//           resolve(data);//         } else {//           reject(body);//         }//       } else {//         reject(error); // 返回错误信息//       }//     });//   });// }//计算签名generateSignature(params, body, secretKey, keys) {const joinedParams = this.joinRequestParams(params, body, secretKey, keys);const md5Hash = crypto.createHash('md5').update(joinedParams).digest('hex').toUpperCase();return md5Hash;}//计算签名joinRequestParams(params, body, secretKey, keys) {const sb = [secretKey]; // 前面加上 secretKeyconst sortedParams = Object.keys(params).filter(key => key !== 'sign' && params[key]) // 过滤掉不需要的键.sort(); // 对键进行排序for (const key of sortedParams) {sb.push(key + params[key]);}sb.push(JSON.stringify(body));sb.push(secretKey); // 最后加上 secretKeyreturn sb.join('');}
}

当然一般 这种三方API 都有人家规定的验签规则 让你 写什么样的格式 拼接成什么样的格式

得看实际的需求 我这里主要介绍的是 post 请求的封装 (在jsNode 中书写后端接口)  是需要引入request 插件