Connection Lifecycle and States
Explore the various states of a WebSocket connection, from opening to closing, and how to manage them.
Understanding Connection States
When you work with WebSockets, it's crucial to know the current state of your connection. This helps you manage data flow and handle disconnections gracefully.
Just like a phone call goes through phases (dialing, connected, hanging up), a WebSocket connection has a defined lifecycle with specific states.
The CONNECTING State (0)
The very first state of a WebSocket is CONNECTING. This happens immediately after you create a new WebSocket object.
- Its numeric value is
0. - In this state, the client is trying to establish a connection with the server.
- This includes the initial HTTP handshake process that upgrades the connection to WebSocket.
- You cannot send messages yet.
All lessons in this course
- The WebSocket Handshake Explained
- WebSocket Data Framing and Messages
- Connection Lifecycle and States
- Subprotocols, Extensions, and Compression