Task 1 - Simple File Server

You are required to implement a simple file server based on express.js.

1. Write a web server with Express.js (1 point)
2. Response correct file on request (1 point)
   • When requesting /public/abc.html, it should send back the correct content of abc.html
3. Response list of files (with links) when requesting the root path (1 point)
   • When request /public, it should send back the file list page
   • Only links of file names on the list page is enough
   • Refer to page http://mirrors.163.com/ubuntu-releases/ for example

Task 2 - Simple Content Management Service

You are required to implement a RESTful service to create, read, update and delete contents on the server.

1. Write a web server (1 point)
2. Implement create, read, update and delete (2 points)
   • Use correct HTTP method
   • Be stateless
   • Comprehensive URL
   • Response with JSON format

Task 3 - Chat Service and Client

You are required to implement a chat service and client based on WebSocket.

1. Write a web server (1 point)
2. Implement the chat service (2 points)
   • Simply forward messages to other clients
3. Implement a client to interact with the service (2 points)
   • UI for write, send and display received messages