add notify accept signal (#1740)

* add notify accept signal

* add import

* update readme,keep same with example

README.md

@@ -1633,6 +1633,7 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
+	"syscall"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -1660,7 +1661,10 @@ func main() {
 	// Wait for interrupt signal to gracefully shutdown the server with
 	// a timeout of 5 seconds.
 	quit := make(chan os.Signal)
-	signal.Notify(quit, os.Interrupt)
+	// kill (no param) default send syscanll.SIGTERM
+	// kill -2 is syscall.SIGINT
+	// kill -9 is syscall. SIGKILL but can"t be catch, so don't need add it
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
 	<-quit
 	log.Println("Shutdown Server ...")
 

examples/graceful-shutdown/graceful-shutdown/server.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
+	"syscall"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -35,7 +36,10 @@ func main() {
 	// Wait for interrupt signal to gracefully shutdown the server with
 	// a timeout of 5 seconds.
 	quit := make(chan os.Signal)
-	signal.Notify(quit, os.Interrupt)
+	// kill (no param) default send syscanll.SIGTERM
+	// kill -2 is syscall.SIGINT
+	// kill -9 is syscall. SIGKILL but can"t be catch, so don't need add it
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
 	<-quit
 	log.Println("Shutdown Server ...")