Design and implement a WebSocket strategy

Design and implement a WebSocket strategy

1. Http polling

   • JavaScript strategy
   • Polling to server
     • See whether there is data that client needs
   • Is not efficient
   • Works in any browser that support JavaScript
   • Does not require HTML5 support

2. Http long pooling

   • Use http to mock up a way
     • For the server pass data back to client

3. WebSocket

   • Duplex or two-way
     • Communication
       • Server
         • Code to interact with socket
       • Client
         • Code to interact with socket
   • Require HTML5 support