feat: add upgrade api

example: curl -X POST -H "Authorization: Bearer 123456" http://ip:port/upgrade

hub/route/server.go

@@ -87,6 +87,8 @@ func Start(addr string, tlsAddr string, secret string,
 		r.Mount("/cache", cacheRouter())
 		r.Mount("/dns", dnsRouter())
 		r.Mount("/restart", restartRouter())
+		r.Mount("/upgrade", upgradeRouter())
+
 	})
 
 	if uiPath != "" {

hub/route/upgrade.go

@@ -0,0 +1,69 @@
+package route
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"syscall"
+
+	"github.com/Dreamacro/clash/hub/updater"
+	"github.com/Dreamacro/clash/log"
+	"github.com/go-chi/render"
+
+	"github.com/go-chi/chi/v5"
+)
+
+func upgradeRouter() http.Handler {
+	r := chi.NewRouter()
+	r.Post("/", upgrade)
+	return r
+}
+
+func upgrade(w http.ResponseWriter, r *http.Request) {
+	// modify from https://github.com/AdguardTeam/AdGuardHome/blob/595484e0b3fb4c457f9bb727a6b94faa78a66c5f/internal/home/controlupdate.go#L108
+	log.Infoln("start update")
+	err := updater.Update()
+	if err != nil {
+		log.Errorln("err:%s", err)
+	}
+
+	execPath, err := os.Executable()
+	if err != nil {
+		render.Status(r, http.StatusInternalServerError)
+		render.JSON(w, r, newError(fmt.Sprintf("getting path: %s", err)))
+		return
+	}
+
+	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)
+		}
+
+		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)
+		}
+	}()
+}