co-wx

Yet another WeChat toolkit in generator style.

Installation

npm install --save co-wx

BodyParser

A connect style request body parser, checks signature of message and parses WeChat message body to req.body;

var WxParser = require('co-wx/parser');

app.all('/robot', WxParser('<signature-token>'), function (req, res, next) {
  var msgType = req.body['MsgType'];
  switch (msgType) {
    case 'event':
      var eventType = req.body['Event']; // => [ 'subscribe' | 'SCAN' | 'LOCATION' | 'CLICK' | 'VIEW' | 'unsubscribe' ]
      // ...
      return res.reply({
        MsgType: 'text',
        Content: 'No comment'
      });
    break;
    case 'text':
      // ...
    break;
  }
  return res.status(200).send(); // Stuffy sound made big money o-o
});

Use res.reply will reply a xml document described as official documentation. FromUserName and ToUserName in the reply object defaults to the value of ToUserName and FromUserName from the incoming message. And a CreateTime record will be generated automatically in the xml document.

Platform API

var WxAPIProvider = require('co-wx/api');

var wxApi = new WxAPIProvider({
  appId: '<your-app-id>',
  secret: '<and-the-secret>'
});

Retrieve information of specific subscriber

var co = require('co');

co(function* () {
  var subscriberInfo = yield wxApi.getSubscriberInfo('<open-id>');
  // => { openId, unionId, nickname, gender, photo, country, province, city, lang }
})
.then(function () { /* ... */ });

Use with a co-router

var Router = require('co-router');

var router = Router();

router.get('/user/:openId', function* (req, res, next) {
  return res.status(200).send(yield wxApi.getSubscriberInfo(req.params.openId));
});

app.use('/some-prefix', router);

Sending a service template message to subscriber

yield wxApi.sendTemplateMessageToSubscriber('<template-id>', openId, url, {
  /* template data */
});

Create a temporary scene based QRCode

var ticket = yield wxApi.createTemporaryQrCode(sceneId, expiresIn);

expiresIn parameter is optional and defaults to maximum value of 7 days. returns a ticket object contains QRCode ticket and url data.

JSSDK parameter API for wx.config (use co-router)

router.get('/config', function* (req, res, next) {
  return res.status(200).send(yield req.wx.getJsApiConfig(req.query.url || req.get('Referer')));
});

Debug

Start with DEBUG variable set to wx:* should turn on debug output of the module.

DEBUG=wx:* npm start

Roadmap

• Basic message handling
• Support AES message security mode
• Support customer service account interface
• Support service template message
• Message broadcast
• Media management
• Menu management
• Subscriber group/tag management
• Support OAuth 2.0
• Generate scene based QRCode
• Generate JS-SDK config
• URL shortener
• Statistics API
• Koa-compatible middleware
• ...

Contribution

The module is developed and used in some of my personal works. I may not implement a full set of APIs described in WeChat documentation. Feel free to open an issue for any feature request or contribution. I'll pick them up in my spare time :-)

License

(The MIT License)