Created
February 21, 2024 19:48
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| package main | |
| import ( | |
| "log" | |
| "net/http" | |
| "time" | |
| "github.com/go-chi/chi/v5" | |
| ) | |
| func main() { | |
| r := chi.NewRouter() | |
| q := make(chan string) | |
| r.Get("/events", func(w http.ResponseWriter, r *http.Request) { | |
| flusher, ok := w.(http.Flusher) | |
| if !ok { | |
| http.Error(w, "SSE 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") | |
| for { | |
| select { | |
| case <-r.Context().Done(): | |
| return | |
| case m := <-q: | |
| w.Write([]byte("event: clock" + "\n")) | |
| w.Write([]byte("data: " + m + " " + time.Now().Format(time.RFC3339) + "\n\n")) | |
| flusher.Flush() | |
| } | |
| } | |
| }) | |
| r.Get("/send", func(w http.ResponseWriter, r *http.Request) { | |
| q <- "Hello, world!" | |
| w.Write([]byte("Sent")) | |
| }) | |
| r.Get("/", func(w http.ResponseWriter, r *http.Request) { | |
| w.Write([]byte(` | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://unpkg.com/[email protected]"></script> | |
| <script src="https://unpkg.com/htmx.org/dist/ext/sse.js"></script> | |
| </head> | |
| <body> | |
| <div hx-ext="sse" sse-connect="http://localhost:3000/events" sse-swap="clock"> | |
| <div id="clock"></div> | |
| </div> | |
| </body> | |
| </html> | |
| `)) | |
| }) | |
| log.Printf("Starting...") | |
| http.ListenAndServe(":3000", r) | |
| } |
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