Description of content
WebSocket is a network transport protocol that can carry out full-duplex communication over a single TCP connection and is located at the application layer of the OSI model. WebSocket makes it easier to exchange data between the client and the server, allowing the server to proactively push data to the client. In the WebSocket API, a handshake between the browser and the server is all that is needed to create a persistent connection and two-way data transfer.
An introduction to the sample
Step 1: Create a New WebSocketHandler
Step 2 Register WebSocketHandler
Step 3 Create a WebSocketHandler client for heartbeat detection and message processing
Step 4 Create a new manager to receive client registration requests and start a thread to perform WebSocket heartbeat detection
Step 5 Create a message processing user to maintain websocketSession
Step 6: Start the application
Testing the demo
The first step is to start the connection
The second step
The client sends data to the server for key session binding. The client also searches for webSocketSession through this key to send messages to the server
The third step simulates sending a message to the client
Step 4 The client receives messages
Application scenarios of WebSocket
- Uploading large files can return the client upload progress in real time
- All duplex communication scenarios in which messages are actively sent to clients