74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
package main
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import (
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"crypto/rand"
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"encoding/hex"
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"fmt"
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"log/slog"
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"net/http"
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"time"
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datastar "github.com/starfederation/datastar/sdk/go"
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)
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const (
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cdn = "https://cdn.jsdelivr.net/gh/starfederation/datastar@develop/bundles/datastar.js"
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port = 9001
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)
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func main() {
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mux := http.NewServeMux()
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style := "display:flex;flex-direction:column;background-color:oklch(25.3267% 0.015896 252.417568);height:100vh;justify-content:center;align-items:center;font-family:ui-sans-serif, system-ui, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';"
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page := []byte(fmt.Sprintf(`
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0" />
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<script type="module" defer src="%s"></script>
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</head>
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<body style="%s">
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<span id="feed" data-on-load="%s"></span>
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</body>
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</html>
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`, cdn, style, datastar.GetSSE("/stream")))
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mux.HandleFunc("GET /", func(w http.ResponseWriter, r *http.Request) {
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w.Write(page)
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})
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mux.HandleFunc("GET /stream", func(w http.ResponseWriter, r *http.Request) {
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ticker := time.NewTicker(100 * time.Millisecond)
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defer ticker.Stop()
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sse := datastar.NewSSE(w, r)
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for {
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select {
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case <-r.Context().Done():
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slog.Debug("Client connection closed")
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return
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case <-ticker.C:
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bytes := make([]byte, 3)
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if _, err := rand.Read(bytes); err != nil {
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slog.Error("Error generating random bytes: ", slog.String("error", err.Error()))
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return
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}
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hexString := hex.EncodeToString(bytes)
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frag := fmt.Sprintf(`<span id="feed" style="color:#%s;border:1px solid #%s;border-radius:0.25rem;padding:1rem;">%s</span>`, hexString, hexString, hexString)
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sse.MergeFragments(frag)
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}
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}
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})
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slog.Info(fmt.Sprintf("Server starting at 0.0.0.0:%d", port))
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if err := http.ListenAndServe(fmt.Sprintf("0.0.0.0:%d", port), mux); err != nil {
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slog.Error("Error starting server:", slog.String("error", err.Error()))
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}
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}
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