snapshot of https://github.com/traggo/server.git (master, 2026-09-16; blobs > 131072B omitted)

server/server.go

@@ -0,0 +1,62 @@
+package server
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/gorilla/mux"
+)
+
+var notifySignal = signal.Notify
+var serverShutdown = func(server *http.Server, ctx context.Context) error {
+	return server.Shutdown(ctx)
+}
+
+// Start starts the http server
+func Start(mux *mux.Router, port int) error {
+	server, shutdown := startServer(mux, port)
+	shutdownOnInterruptSignal(server, 2*time.Second, shutdown)
+	return waitForServerToClose(shutdown)
+}
+
+func startServer(mux *mux.Router, port int) (*http.Server, chan error) {
+	srv := &http.Server{
+		Addr:    fmt.Sprintf(":%d", port),
+		Handler: mux,
+	}
+
+	shutdown := make(chan error)
+	go func() {
+		err := srv.ListenAndServe()
+		shutdown <- err
+	}()
+	return srv, shutdown
+}
+
+func shutdownOnInterruptSignal(server *http.Server, timeout time.Duration, shutdown chan<- error) {
+	interrupt := make(chan os.Signal, 1)
+	notifySignal(interrupt, os.Interrupt)
+
+	go func() {
+		select {
+		case <-interrupt:
+			ctx, cancel := context.WithTimeout(context.Background(), timeout)
+			defer cancel()
+			if err := serverShutdown(server, ctx); err != nil {
+				shutdown <- err
+			}
+		}
+	}()
+}
+
+func waitForServerToClose(shutdown <-chan error) error {
+	err := <-shutdown
+	if err == http.ErrServerClosed {
+		return nil
+	}
+	return err
+}

server/server_test.go

@@ -0,0 +1,105 @@
+package server
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/gorilla/mux"
+	"github.com/phayes/freeport"
+	"github.com/stretchr/testify/assert"
+	"github.com/traggo/server/test"
+)
+
+func TestShutdownOnErrorWhileShutdown(t *testing.T) {
+	db := test.InMemoryDB(t)
+	defer db.Close()
+
+	disposeInterrupt := fakeInterrupt(t)
+	defer disposeInterrupt()
+
+	shutdownError := errors.New("shutdown error")
+	disposeShutdown := fakeShutdownError(shutdownError)
+	defer disposeShutdown()
+
+	finished := make(chan error)
+
+	go func() {
+		finished <- Start(mux.NewRouter(), freeport.GetPort())
+	}()
+
+	select {
+	case <-time.After(1 * time.Second):
+		t.Fatal("Server should be closed")
+	case err := <-finished:
+		assert.Equal(t, shutdownError, err)
+	}
+}
+
+func TestShutdownAfterError(t *testing.T) {
+	db := test.InMemoryDB(t)
+	defer db.Close()
+
+	finished := make(chan error)
+
+	go func() {
+		finished <- Start(mux.NewRouter(), -5)
+	}()
+
+	select {
+	case <-time.After(1 * time.Second):
+		t.Fatal("Server should be closed")
+	case err := <-finished:
+		assert.NotNil(t, err)
+	}
+}
+
+func TestShutdown(t *testing.T) {
+	db := test.InMemoryDB(t)
+	defer db.Close()
+
+	dispose := fakeInterrupt(t)
+	defer dispose()
+
+	finished := make(chan error)
+
+	go func() {
+		finished <- Start(mux.NewRouter(), freeport.GetPort())
+	}()
+
+	select {
+	case <-time.After(1 * time.Second):
+		t.Fatal("Server should be closed")
+	case err := <-finished:
+		assert.Nil(t, err)
+	}
+}
+
+func fakeInterrupt(t *testing.T) func() {
+	oldNotify := notifySignal
+	notifySignal = func(c chan<- os.Signal, sig ...os.Signal) {
+		assert.Contains(t, sig, os.Interrupt)
+		go func() {
+			select {
+			case <-time.After(100 * time.Millisecond):
+				c <- os.Interrupt
+			}
+		}()
+	}
+	return func() {
+		notifySignal = oldNotify
+	}
+}
+
+func fakeShutdownError(err error) func() {
+	old := serverShutdown
+	serverShutdown = func(server *http.Server, ctx context.Context) error {
+		return err
+	}
+	return func() {
+		serverShutdown = old
+	}
+}