tiny wechat robot

tiny-wechat-robot

Use code hijack and code injection (phantomjs_wechat.js) to implement a simple WeChat robot application.

usage:

1. Make sure PhantomJS(ref) is on the system PATH
2. npm run serve
3. npm run wechat (open a new Terminal Tab to execute this command)
4. According to the command line prompts, scan the QR code to log in to WeChat.
5. Send a ping test message to the currently logged in user and you should automatically receive a pong response.

Tested with node v7.7.3 and PhantomJS V 2.1.1 : phantomjs-2.1.1-macosx.zip or phantomjs-2.1.1-linux-x86_64.tar.bz2

Core functions

Currently, it is the simplest ping-pong response robot (the core code is wechat_injection.js), which sends a message to当前登录用户:

1. Receive ping , reply pong ;
2. Receive pingping , reply pongpong ;
3. After receiving pingpingping , reply pongpongpong ;
4. Others, no special treatment will be done.

design ideas

1. Use phantomjs to access the WeChat web login page;
2. Hijacking script: https://res.wx.qq.com/a/wx_fed/webwx/res/static/js/index_c7d281c.js (The version number of this script may change) Request the script through phantomjs networkRequest.changeUrl() Forwarded as native script wechat_injection.js;
3. Wechat_injection.js overloads angular.bootstrap and mounts custom hooks so that WeChat chat information can be monitored. At the same time, loading and executing the original WeChat index js at the end of the script requires special processing for the special ECMA language features (currently only one let has problems, which has been replaced with var ).
4. Make automatic responses based on custom rules.

How to debug?

Use any proxy software, such as Charles Proxy, or the chrome browser plug-in trumpet to forward resource requests.

• It should be noted loadOriginalScript() in wechat_injection.js will encounter cross-domain request restrictions in Chrome. You can modify the code directly, download the original script and add it to the file.