wechat
WeChat public platform message interface service middleware
...Since the client of the public platform application is actually WeChat, it is not realistic to use traditional cookies to implement sessions. For this reason, the middleware module adds Session support on the basis of openid. Once the connect.sessionmiddleware is enabled on the server , the req.wxsessionproperties can be accessed in the business . This property is req.sessionsimilar to behavior. At present, the WeChat public platform can receive 7 kinds of content: text, picture, audio, video, location, link, and event. Support 6 kinds of reply, plain text, graphic text, music, audio frequency, picture, video frequency.