57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
package main
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import (
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"context"
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"errors"
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"log/slog"
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"net/http"
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"os"
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"os/signal"
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"syscall"
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"time"
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)
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func main() {
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addr := getenv("BACKEND_ADDR", ":8080")
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logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
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mux := http.NewServeMux()
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mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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_, _ = w.Write([]byte(`{"status":"ok","service":"backend"}`))
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})
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server := &http.Server{
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Addr: addr,
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Handler: mux,
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ReadHeaderTimeout: 5 * time.Second,
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}
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
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defer stop()
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go func() {
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logger.Info("backend listening", "addr", addr)
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if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
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logger.Error("backend failed", "error", err)
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os.Exit(1)
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}
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}()
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<-ctx.Done()
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shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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if err := server.Shutdown(shutdownCtx); err != nil {
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logger.Error("backend shutdown failed", "error", err)
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os.Exit(1)
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}
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}
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func getenv(key, fallback string) string {
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if value := os.Getenv(key); value != "" {
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return value
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}
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return fallback
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}
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