snirappi / classical Goto Github PK

Check for blank message in scripts.js and don't add them to the chat. Currently the servlet refuses to send them to other clients, blank messages only show up locally.

As far as I understand, for chat room, the client POST the request with parameters of 'user', 'content', 'id' and 'parentId', and GET the JSON with those four params.

I have a few questions here:

1. How does server notify the client when there's a new message arrived? Should client maintain a timer & keep querying the server, or the server will push the notification to the client?
2. Every class has its own chat room. How does the uri reflect the class id? Is it like http://server/classid/chat? Sorry I don't really understand java, didn't get much info from the code.
3. What are id and parentId here? Should a client prepare the id and parentId when POSTing the request?

And, how does one log into the system and retrieve the classid? Any spec here?