anyhttp.go

@@ -2,6 +2,7 @@
 package anyhttp
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"io/fs"
@@ -14,6 +15,8 @@ import (
 	"sync"
 	"syscall"
 	"time"
+
+	"go.balki.me/anyhttp/idle"
 )
 
 // AddressType of the address passed
@@ -200,65 +203,59 @@ func (s *SysdConfig) GetListener() (net.Listener, error) {
 	return nil, errors.New("neither FDIndex nor FDName set")
 }
 
-// GetListener gets a unix or systemd socket listener
-func GetListener(addr string) (AddressType, net.Listener, error) {
-	if strings.HasPrefix(addr, "unix/") {
-		usc := NewUnixSocketConfig(strings.TrimPrefix(addr, "unix/"))
-		l, err := usc.GetListener()
-		return UnixSocket, l, err
-	}
-
-	if strings.HasPrefix(addr, "sysd/fdidx/") {
-		idx, err := strconv.Atoi(strings.TrimPrefix(addr, "sysd/fdidx/"))
+// Serve creates and serve a http server.
+func Serve(addr string, h http.Handler) (addrType AddressType, srv *http.Server, idler idle.Idler, done <-chan error, err error) {
+	addrType, usc, sysc, err := ParseAddress(addr)
 	if err != nil {
-			return Unknown, nil, fmt.Errorf("invalid fdidx, addr:%q err: %w", addr, err)
-		}
-		sysdc := NewSysDConfigWithFDIdx(idx)
-		l, err := sysdc.GetListener()
-		return SystemdFD, l, err
+		return
 	}
 
-	if strings.HasPrefix(addr, "sysd/fdname/") {
-		sysdc := NewSysDConfigWithFDName(strings.TrimPrefix(addr, "sysd/fdname/"))
-		l, err := sysdc.GetListener()
-		return SystemdFD, l, err
-	}
-
-	if port, err := strconv.Atoi(addr); err == nil {
-		if port > 0 && port < 65536 {
-			addr = fmt.Sprintf(":%v", port)
+	listener, err := func() (net.Listener, error) {
+		if usc != nil {
+			return usc.GetListener()
+		} else if sysc != nil {
+			return sysc.GetListener()
 		} else {
-			return Unknown, nil, fmt.Errorf("invalid port: %v", port)
-		}
-	}
-
 			if addr == "" {
 				addr = ":http"
 			}
-
-	l, err := net.Listen("tcp", addr)
-	return TCP, l, err
-}
-
-// Serve creates and serve a http server.
-func Serve(addr string, h http.Handler) (AddressType, *http.Server, <-chan error, error) {
-	addrType, listener, err := GetListener(addr)
-	if err != nil {
-		return addrType, nil, nil, err
+			return net.Listen("tcp", addr)
 		}
-	srv := &http.Server{Handler: h}
-	done := make(chan error)
-	go func() {
-		done <- srv.Serve(listener)
-		close(done)
 	}()
-	return addrType, srv, done, nil
+	if err != nil {
+		return
+	}
+	errChan := make(chan error)
+	done = errChan
+	if addrType == SystemdFD && sysc.IdleTimeout != nil {
+		idler = idle.CreateIdler(*sysc.IdleTimeout)
+		srv = &http.Server{Handler: idle.WrapIdlerHandler(idler, h)}
+		waitErrChan := make(chan error)
+		go func() {
+			waitErrChan <- srv.Serve(listener)
+			close(waitErrChan)
+		}()
+		go func() {
+			select {
+			case err := <-waitErrChan:
+				errChan <- err
+			case <-idler.Chan():
+				errChan <- srv.Shutdown(context.TODO())
+			}
+		}()
+	} else {
+		srv = &http.Server{Handler: h}
+		go func() {
+			errChan <- srv.Serve(listener)
+		}()
+	}
+	return
 }
 
 // ListenAndServe is the drop-in replacement for `http.ListenAndServe`.
 // Supports unix and systemd sockets in addition
 func ListenAndServe(addr string, h http.Handler) error {
-	_, _, done, err := Serve(addr, h)
+	_, _, _, done, err := Serve(addr, h)
 	if err != nil {
 		return err
 	}