How can websockets ensure successful message delivery?
The WebSocket protocol itself includes mechanisms to ensure the successful delivery of messages.
- Message verification mechanism: After the client sends a message, the server will send back a confirmation message indicating that it has received the client’s message. The client can use this confirmation message to determine if the message was successfully sent.
- Message timeout mechanism: Clients can set a timeout period after sending a message. If the client does not receive a confirmation message from the server within this timeout period, the client can choose to resend the message or take other actions.
- Heartbeat mechanism: The WebSocket protocol supports a heartbeat mechanism, which involves regularly sending an empty message to the server to keep the connection active. If the client does not receive a response from the server, it can be assumed that the connection has been broken.
In addition to the mechanisms provided by the agreement itself, some additional processing can be done based on specific business needs, such as:
- Reconnection: After detecting a disconnection, the client can attempt to reconnect to the server to ensure that messages are successfully sent.
- Data persistence: clients can save messages locally to send them once reconnected to the server, ensuring that messages are not lost.
In general, ensuring the successful transmission of WebSocket messages requires a combination of the mechanisms provided by the protocol itself and specific business requirements.
