按服务器停止服务器发送的事件

Question

When using server-sent events, how does server communicate to browser that there won't be more events and that it should close the sse connection?

Is this a part of the protocol or should this be implemented by passing hint in normal event to the client that it can close event source ?

Answer 1

The server-sent events is yet another streaming technique which is one of ways of Comet . To stop streaming data, just close the connection in server. You don't need to let client call close method of EventSource instance.

FYI, the following links show that how Cettia streaming transport backed by server-sent events implements to close connection. (Note that I'm an author of Cettia)

• Java server - https://github.com/cettia/cettia-java-server/blob/1.0.0-Beta1/server%2Fsrc%2Fmain%2Fjava%2Fio%2Fcettia%2Ftransport%2Fhttp%2FHttpTransportServer.java#L358
• JavaScript client - https://github.com/cettia/cettia-javascript-client/blob/1.0.0-Beta1/cettia.js#L884-L886

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Edit

For that issue, I added es.close within es.onerror .