🚧 Created sample helloworld HTTP server

go.mod

@@ -1,3 +1,5 @@
 module source.toby3d.me/toby3d/home
 
 go 1.21.3
+
+require github.com/caarlos0/env/v10 v10.0.0

go.sum

@@ -0,0 +1,2 @@
+github.com/caarlos0/env/v10 v10.0.0 h1:yIHUBZGsyqCnpTkbjk8asUlx6RFhhEs+h7TOBdgdzXA=
+github.com/caarlos0/env/v10 v10.0.0/go.mod h1:ZfulV76NvVPw3tm591U4SwL3Xx9ldzBP9aGxzeN7G18=

main.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"runtime"
+	"runtime/pprof"
+	"syscall"
+
+	"github.com/caarlos0/env/v10"
+
+	"source.toby3d.me/toby3d/home/internal/domain"
+)
+
+var (
+	config = new(domain.Config)
+	logger = log.New(os.Stdout, "home\t", log.Lmsgprefix|log.LstdFlags|log.LUTC)
+)
+
+var cpuProfilePath, memProfilePath string
+
+func init() {
+	flag.StringVar(&cpuProfilePath, "cpuprofile", "", "set path to saving CPU memory profile")
+	flag.StringVar(&memProfilePath, "memprofile", "", "set path to saving pprof memory profile")
+	flag.Parse()
+
+	if err := env.ParseWithOptions(config, env.Options{
+		Prefix: "HOME_",
+	}); err != nil {
+		logger.Fatalln("cannot unmarshal configuration into domain:", err)
+	}
+}
+
+func main() {
+	ctx := context.Background()
+
+	server := &http.Server{
+		Addr: config.AddrPort().String(),
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+			fmt.Fprintln(w, "hello, world!")
+		}),
+	}
+
+	done := make(chan os.Signal, 1)
+	signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
+
+	if cpuProfilePath != "" {
+		cpuProfile, err := os.Create(cpuProfilePath)
+		if err != nil {
+			logger.Fatalln("could not create CPU profile:", err)
+		}
+		defer cpuProfile.Close()
+
+		if err = pprof.StartCPUProfile(cpuProfile); err != nil {
+			logger.Fatalln("could not start CPU profile:", err)
+		}
+		defer pprof.StopCPUProfile()
+	}
+
+	go func(server *http.Server) {
+		logger.Printf("starting server on %d...", config.Port)
+
+		if err := server.ListenAndServe(); err != nil {
+			logger.Fatalln("cannot listen and serve server:", err)
+		}
+	}(server)
+
+	<-done
+
+	if err := server.Shutdown(ctx); err != nil {
+		logger.Fatalln("failed shutdown server:", err)
+	}
+
+	if memProfilePath == "" {
+		return
+	}
+
+	memProfile, err := os.Create(memProfilePath)
+	if err != nil {
+		logger.Fatalln("could not create memory profile:", err)
+	}
+	defer memProfile.Close()
+
+	runtime.GC() // NOTE(toby3d): get up-to-date statistics
+
+	if err = pprof.WriteHeapProfile(memProfile); err != nil {
+		logger.Fatalln("could not write memory profile:", err)
+	}
+}