使用ThinkJs搭建微信中控服务的实现方法

|--- 微信相关
| |--- 0. 处理微信推过来的一些消息
| |--- 1. 获取微信SDK配置参数
| |--- 2. 微信鉴权登陆
| |--- 3. 获取微信用户信息
| |--- 4. 获取AccessToken
| |--- 5. 批量发送模版消息
| |--- 6. 获取模版消息列表
| |--- 7. 批量发送客服消息

$ npm install -g think-cli

$ thinkjs new demo;
$ cd demo;
$ npm install; 
$ npm start; 

|--- development.js  //开发环境下的入口文件
|--- nginx.conf //nginx 配置文件
|--- package.json
|--- pm2.json //pm2 配置文件
|--- production.js //生产环境下的入口文件
|--- README.md
|--- src
| |--- bootstrap //启动自动执行目录 
| | |--- master.js //Master 进程下自动执行
| | |--- worker.js //Worker 进程下自动执行
| |--- config //配置文件目录
| | |--- adapter.js // adapter 配置文件 
| | |--- config.js // 默认配置文件 
| | |--- config.production.js //生产环境下的默认配置文件，和 config.js 合并 
| | |--- extend.js //extend 配置文件 
| | |--- middleware.js //middleware 配置文件 
| | |--- router.js //自定义路由配置文件
| |--- controller //控制器目录 
| | |--- base.js
| | |--- index.js
| |--- logic //logic 目录
| | |--- index.js
| |--- model //模型目录
| | |--- index.js
|--- view //模板目录
| |--- index_index.html

$ npm install think-wechat --save

$ cnpm install think-wechat --save

const wechat = require('think-wechat')
module.exports = [
  ...
   {
    handle: wechat,
    match: '/index',
    options: {
      token: '', // 令牌，和公众号/基本配置/服务器配置里面写一样的即可
      appid: '', // 这里貌似可以随便填，因为我们后面要用数据库配置多个公众号
      encodingAESKey: '',
      checkSignature: false
    }
  }, {
    handle: 'payload', // think-wechat 必须要在 payload 中间件前面加载，它会代替 payload 处理微信发过来的 post 请求中的数据。
    options: {
      keepExtensions: true,
      limit: '5mb'
    }
  },
]

/src/controller/index.js

module.exports = class extends think.Controller {
  /*
  * 入口：验证开发者服务器
  * 验证开发者服务器，这里只是演示，所以没做签名校验，实际上应该要根据微信要求进行签名校验
  */
  async indexAction() {
    let that = this;
    if (that.method != 'REPLY') {
      return that.json({code: 1, msg: '非法请求', data: null})
    }
    const {echostr} = that.get();
    return that.end(echostr);
  }
   
  /*
  * 文字
  * 用于处理微信推过来的文字消息
  */
  async textAction() {
    let that = this;
    let {id, signature, timestamp, nonce, openid} = that.get();
    let {ToUserName, FromUserName, CreateTime, MsgType, Content, MsgId} = that.post();
    .....
    that.success('')
  }
  
  /*
  * 事件
  * 用于处理微信推过来的事件消息，例如点击菜单等
  */
  async eventAction() {
    let that = this;
    let {id, signature, timestamp, nonce, openid} = that.get();
    let {ToUserName, FromUserName, CreateTime, MsgType, Event, EventKey, Ticket, Latitude, Longitude, Precision} = that.post();
    switch (Event) {
      case 'subscribe': // 关注公众号
        ...
        break;
      case 'unsubscribe': // 取消关注公众号
        ...
        break;
      case 'SCAN': // 已关注扫码
        ...
        break;
      case 'LOCATION': // 地理位置
        ...
        break;
      case 'CLICK': // 自定义菜菜单
        ...
        break;
      case 'VIEW': // 跳转
        ...
        break;
      case 'TEMPLATESENDJOBFINISH':// 模版消息发送完毕
        ...
        break;
    } 
    that.success('')
  }
}

|--- src
| |--- controller //控制器目录 
| | |--- index.js // 处理微信推送的消息，上面有写到
| | |--- common.js // 一些公共方法
| | |--- open // 开放给其他业务服务的api接口
| | | |--- wx.js
| | |--- private // 放一些内部调用的方法，调用微信api的方法主要在这里面
| | | |--- wx.js

// src/controller/common.js

import axios from 'axios'
import {baseSql} from "./unit";

module.exports = class extends think.Controller {
  // 获取appinfo
  async getWxConfigById(id) {
    let that = this;
    let data = await that.cache(`wx_config:wxid_${id}`, async () => {
      // 数据库内取
      let info = await that.model('wx_config', baseSql).where({id: id}).find();
      if (!think.isEmpty(info)) {
        return info
      }
    })
    return data || {}
  }

  // 获取access_token
  async getAccessToken(id) {
    let that = this;
    let accessToken = await that.cache(`wx_access_token:wxid_${id}`, async () => {
      let {appid, secret} = await that.getWxConfigById(id);
      let {data} = await axios({
        method: 'get',
        url: `https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${appid}&secret=${secret}`
      });
      return data.access_token
    });
    return accessToken
  }
}

// src/controller/open/wx.js

async __before() {
  let that = this;
  let wxid = that.get('wxid');
  if (think.isEmpty(wxid)) {
    return that.json({code: 1, msg: 'wxid不存在'})
  }
  that.wxConfig = await that.controller('common').getWxConfigById(wxid);
  if (think.isEmpty(that.wxConfig)) {
    return that.json({code: 1, msg: 'wxid不存在'})
  }
}

// src/controller/open/wx.js

async get_access_tokenAction() {
  let that = this;
  let accessToken = await that.controller('common').getAccessToken(that.wxConfig.id);
  return that.json({code: 0, msg: '', data: {access_token: accessToken}})
}

// src/controller/open/wx.js

async get_wxsdk_configAction() {
  let that = this;
  let {url} = that.get();
  if (think.isEmpty(url)) {
    return that.json({code: 1, msg: '参数不正确'})
  }
  let sdkConfig = await that.controller('private/wx').getSdkConfig(that.wxConfig.id, url);
  return that.json({code: 0, msg: '', data: sdkConfig})
}


// src/controller/private/wx.js

const sha1 = require('sha1');
const getTimestamp = () => parseInt(Date.now() / 1000)
const getNonceStr = () => Math.random().toString(36).substr(2, 15)
const getSignature = (params) => sha1(Object.keys(params).sort().map(key => `${key.toLowerCase()}=${params[key]}`).join('&'));

async getSdkConfig(id, url) {
  let that = this;
  let {appid} = await that.controller('common').getWxConfigById(id);
  let shareConfig = {
    nonceStr: getNonceStr(),
    jsapi_ticket: await that.getJsapiTicket(id),
    timestamp: getTimestamp(),
    url: url
  }
  return {
    appId: appid,
    timestamp: shareConfig.timestamp,
    nonceStr: shareConfig.nonceStr,
    signature: getSignature(shareConfig)
  }
}

// src/controller/open/wx.js

async get_userinfoAction() {
  let that = this;
  let {openid} = that.get();
  if (think.isEmpty(openid)) {
    return that.json({code: 1, msg: '参数不正确'})
  }
  let userInfo = await that.controller('private/wx').getUserInfo(that.wxConfig.id, openid);
  if (think.isEmpty(userInfo)) {
    return that.json({code: 1, msg: 'openid不存在', data: null})
  }
  return that.json({code: 0, msg: '', data: userInfo})
}


// src/controller/private/wx.js

async getUserInfo(id, openid) {
  let that = this;
  let userInfo = await that.cache(`wx_userinfo:wxid_${id}:${openid}`, async () => {
    //先取数据库
    let model = that.model('wx_userinfo', baseSql);
    let userInfo = await model.where({wx_config_id: id, openid: openid}).find();
    if (!think.isEmpty(userInfo) && userInfo.subscribe == 1 && userInfo.unionid != null) {
      return userInfo
    }
    //如果数据库内没有，取新的存入数据库
    let accessToken = await that.controller('common').getAccessToken(id);
    let url = `https://api.weixin.qq.com/cgi-bin/user/info?access_token=${accessToken}&openid=${openid}&lang=zh_CN`;
    let {data} = await axios({method: 'get', url: url});
    if (data.openid) {
      //命中修改，没有命中添加
      let resId = await model.thenUpdate(
        Object.assign(data, {wx_config_id: id}),
        {openid: openid, wx_config_id: id});
      return await model.where({id: resId}).find();
    }
  })
  return userInfo
}

// src/controller/open/wx.js

async send_msg_textAction() {
  let that = this;
  let {list} = that.post();
  if (think.isEmpty(list)) {
    return that.json({code: 1, msg: '参数不正确'})
  }
  that._sendMsgTextList(that.wxConfig.id, list);
  return that.json({code: 0, msg: '', data: null})
 }
 
 async _sendMsgTextList(wxid, list) {
  let that = this;
  let apiWxController = that.controller('private/wx');
  for (let item of list) {
    let data = await apiWxController.sendMsgText(wxid, item.openid, item.text)
  }
}


// src/controller/private/wx.js

async sendMsgText(id, openid, content) {
  let that = this;
  let accessToken = await that.controller('common').getAccessToken(id);
  let url = `https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=${accessToken}`
  let {data} = await axios({
    method: 'post', url: url, data: {"msgtype": 'text', "touser": openid, "text": {"content": content}}
  })
  return data;
}