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25 lines
907 B
Markdown
25 lines
907 B
Markdown
# learning_sse
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Learning [Server Side Events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events) can be fun.
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The magic is in setting the `Content Type` header to `text/event-stream`, writing the response in the from of `data: %s \n\n`, and flushing the content of the WriteResponse buffer manually. This is necessary because by default Go will implicitly flush the buffer only once the Handler has returned.
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```
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func SSEHandler(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "text/event-stream")
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tokens := strings.Split("Hey there Drew. I hope you enjoy The Alters!", " ")
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for _, token := range tokens {
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w.Write([]byte(fmt.Sprintf("data: %s \n\n", token)))
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w.(http.Flusher).Flush()
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time.Sleep(time.Millisecond * 420)
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}
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}
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```
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Use `go run main.go` and try curling the the sse endpoint.
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```
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curl http://0.0.0.0:8888/sse
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``` |