Barebones HTTP server setup

main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"os/signal"
+	"sync"
+	"time"
+)
+
+func run(ctx context.Context, w io.Writer, args []string) error {
+	ctx, cancel := signal.NotifyContext(ctx, os.Interrupt)
+	defer cancel()
+
+	config := &Config{
+		Host: "",
+		Port: "3333",
+	}
+
+	srv := NewServer(config)
+	httpServer := &http.Server{
+		Addr:    net.JoinHostPort(config.Host, config.Port),
+		Handler: srv,
+	}
+
+	go func() {
+		fmt.Fprintf(w, "Listening on %s\n", httpServer.Addr)
+		if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			fmt.Fprintf(os.Stderr, "Error listening and serving: %s\n", err)
+		}
+	}()
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		<-ctx.Done()
+		shutdownCtx := context.Background()
+		shutdownCtx, cancel := context.WithTimeout(shutdownCtx, 10*time.Second)
+		defer cancel()
+		if err := httpServer.Shutdown(shutdownCtx); err != nil {
+			fmt.Fprintf(os.Stderr, "Error shutting down http server: %s\n", err)
+		}
+	}()
+	wg.Wait()
+	fmt.Fprintln(w, "Shutting down")
+	return nil
+}
+
+func main() {
+	ctx := context.Background()
+	if err := run(ctx, os.Stdout, os.Args); err != nil {
+		fmt.Fprintf(os.Stderr, "%s\n", err)
+		os.Exit(1)
+	}
+}