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|
package api
import (
"fmt"
"log"
"net/http"
"yaum/internal/sse"
)
type StreamHandler struct {
broadcaster *sse.Broadcaster
}
func NewStreamHandler(b *sse.Broadcaster) *StreamHandler {
return &StreamHandler{broadcaster: b}
}
func (sh *StreamHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
flusher, ok := w.(http.Flusher)
if !ok {
http.Error(w, "streaming not supported", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/event-stream")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Connection", "keep-alive")
w.Header().Set("X-Accel-Buffering", "no")
ch := sh.broadcaster.Subscribe()
defer sh.broadcaster.Unsubscribe(ch)
_, err := fmt.Fprintf(w, "event: connected\ndata: {}\n\n")
if err != nil {
return
}
flusher.Flush()
ctx := r.Context()
for {
select {
case data, ok := <-ch:
if !ok {
return
}
_, err := fmt.Fprintf(w, "event: heartbeat\ndata: %s\n\n", data)
if err != nil {
log.Printf("[sse] cliente desconectado: %v", err)
return
}
flusher.Flush()
case <-ctx.Done():
return
}
}
}
|
