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by Too
1590 days ago
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Can someone give a brief summary of how this differs from long polling. It looks very similar except it has a small layer of formalized event/data/id structure on top? Are there any differences in the lower connection layers, or any added support by browsers and proxies given some new headers? What are the benefits of SSE vs long polling? |
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The underlying mechanism effectively is the same: A long running HTTP response stream. However long-polling commonly is implemented by "silence" until an event comes in and then performing another request to wait for the next event, whereas SSE sends you multiple events per request.