60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package api
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import (
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"fmt"
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"log"
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"net/http"
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"time"
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"github.com/uptrace/bunrouter"
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"goth.stack/lib"
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)
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func SSE(w http.ResponseWriter, req bunrouter.Request) error {
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queryParams := req.URL.Query()
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channel := queryParams.Get("channel")
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if channel == "" {
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channel = "default"
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}
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// Use the request context, which is cancelled when the client disconnects
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ctx := req.Context()
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pubsub, _ := lib.Subscribe(lib.RedisClient, channel)
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w.Header().Set("Content-Type", "text/event-stream")
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w.Header().Set("Connection", "keep-alive")
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w.Header().Set("Cache-Control", "no-cache")
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// Create a ticker that fires every 15 seconds
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ticker := time.NewTicker(30 * time.Second)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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// If the client has disconnected, stop the loop
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return nil
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case <-ticker.C:
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// Every 30 seconds, send a comment to keep the connection alive
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if _, err := w.Write([]byte(": keep-alive\n\n")); err != nil {
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return err
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}
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w.(http.Flusher).Flush()
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default:
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// Handle incoming messages as before
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msg, err := pubsub.ReceiveMessage(ctx)
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if err != nil {
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log.Printf("Failed to receive message: %v", err)
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continue
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}
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data := fmt.Sprintf("data: %s\n\n", msg.Payload)
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if _, err := w.Write([]byte(data)); err != nil {
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return err
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}
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w.(http.Flusher).Flush()
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}
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}
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}
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