Added File Mode to sockets and socket activation

1 files changed, 85 insertions, 0 deletions

diff --git a/http/http.go b/http/http.go
new file mode 100644
index 0000000..063c1e8
--- /dev/null
+++ b/http/http.go
@@ -0,0 +1,85 @@
+package http
+
+import (
+	"context"
+	"fmt"
+	"go.sudomsg.com/kit/logging"
+	"golang.org/x/sync/errgroup"
+	"log/slog"
+	"net"
+	"net/http"
+)
+
+// RunHTTPServers runs HTTP servers concurrently on all provided listeners.
+//
+// The provided handler is used for all servers.
+// Servers respond to context cancellation by performing a graceful shutdown with a timeout of 10 seconds.
+//
+// Logging is performed using the slog.Logger extracted from context.
+// Each server logs startup, shutdown, and errors.
+//
+// This function blocks until all servers have stopped or an error occurs.
+func RunHTTPServers(ctx context.Context, lns Listeners, handler http.Handler) error {
+	g, ctx := errgroup.WithContext(ctx)
+
+	for _, ln := range lns {
+		g.Go(func() error {
+			logger, ctx := logging.With(ctx, "address", ln.Addr())
+
+			srv := &http.Server{
+				Addr:    ln.Addr().String(),
+				Handler: handler,
+				BaseContext: func(l net.Listener) context.Context {
+					return ctx
+				},
+				ErrorLog: slog.NewLogLogger(logger.Handler(), slog.LevelError),
+			}
+
+			logger.Log(ctx, slog.LevelInfo, "HTTP server serving")
+
+			if err := httpServeContext(ctx, srv, ln); err != nil {
+				return fmt.Errorf("HTTP server Serve Error: %w", err)
+			}
+			return nil
+		})
+
+	}
+	return g.Wait()
+}
+
+func httpServeContext(ctx context.Context, srv *http.Server, ln net.Listener) error {
+	logger := logging.FromContext(ctx)
+
+	shutdownErrCh := make(chan error, 1)
+
+	go func() {
+		<-ctx.Done()
+		shutdownErrCh <- httpServeShutdown(srv, logger)
+	}()
+	serveErr := srv.Serve(ln)
+
+	// Always wait for shutdown result
+	shutdownErr := <-shutdownErrCh
+
+	// Prioritize Serve error
+	if serveErr != nil && !errors.Is(serveErr, http.ErrServerClosed) {
+		return fmt.Errorf("http serve error: %w", serveErr)
+	}
+	if shutdownErr != nil {
+		return fmt.Errorf("http shutdown error: %w", shutdownErr)
+	}
+	return nil
+}
+
+func httpServeShutdown(srv *http.Server, logger *slog.Logger) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(ctx); err != nil {
+		logger.Log(ctx, slog.LevelWarn, "HTTP server Shutdown Error", slog.Any("error", err))
+		return err
+	}
+
+	logger.Log(ctx, slog.LevelInfo, "HTTP Server Shutdown Complete")
+	return nil
+}