From d2b5e19b68e25ade4e2d79169247c139adac995b Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Tue, 14 Mar 2023 22:38:42 +0800
Subject: [PATCH] fix: ensure restart api return ok

---
 hub/route/restart.go | 49 ++++++++++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 20 deletions(-)

diff --git a/hub/route/restart.go b/hub/route/restart.go
index 196896a3..bbf83f5e 100644
--- a/hub/route/restart.go
+++ b/hub/route/restart.go
@@ -21,7 +21,7 @@ func restartRouter() http.Handler {
 }
 
 func restart(w http.ResponseWriter, r *http.Request) {
-	// modify from https://github.com/AdguardTeam/AdGuardHome/blob/595484e0b3fb4c457f9bb727a6b94faa78a66c5f/internal/home/controlupdate.go#L180
+	// modify from https://github.com/AdguardTeam/AdGuardHome/blob/595484e0b3fb4c457f9bb727a6b94faa78a66c5f/internal/home/controlupdate.go#L108
 	execPath, err := os.Executable()
 	if err != nil {
 		render.Status(r, http.StatusInternalServerError)
@@ -29,25 +29,34 @@ func restart(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if runtime.GOOS == "windows" {
-		cmd := exec.Command(execPath, os.Args[1:]...)
-		log.Infoln("restarting: %q %q", execPath, os.Args[1:])
-		cmd.Stdin = os.Stdin
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		err = cmd.Start()
-		if err != nil {
-			log.Fatalln("restarting:: %s", err)
+	render.JSON(w, r, render.M{"status": "ok"})
+	if f, ok := w.(http.Flusher); ok {
+		f.Flush()
+	}
+
+	// modify from https://github.com/AdguardTeam/AdGuardHome/blob/595484e0b3fb4c457f9bb727a6b94faa78a66c5f/internal/home/controlupdate.go#L180
+	// The background context is used because the underlying functions wrap it
+	// with timeout and shut down the server, which handles current request.  It
+	// also should be done in a separate goroutine for the same reason.
+	go func() {
+		if runtime.GOOS == "windows" {
+			cmd := exec.Command(execPath, os.Args[1:]...)
+			log.Infoln("restarting: %q %q", execPath, os.Args[1:])
+			cmd.Stdin = os.Stdin
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+			err = cmd.Start()
+			if err != nil {
+				log.Fatalln("restarting:: %s", err)
+			}
+
+			os.Exit(0)
 		}
 
-		os.Exit(0)
-	}
-
-	log.Infoln("restarting: %q %q", execPath, os.Args[1:])
-	err = syscall.Exec(execPath, os.Args, os.Environ())
-	if err != nil {
-		log.Fatalln("restarting: %s", err)
-	}
-
-	render.JSON(w, r, render.M{"status": "ok"})
+		log.Infoln("restarting: %q %q", execPath, os.Args[1:])
+		err = syscall.Exec(execPath, os.Args, os.Environ())
+		if err != nil {
+			log.Fatalln("restarting: %s", err)
+		}
+	}()
 }