Update gophers example.

README.md

@@ -92,6 +92,71 @@ func main() {
 }
 ```
 
+## [Example: gophers](https://github.com/olahol/melody/tree/master/examples/gophers)
+
+[![Gophers](https://cdn.rawgit.com/olahol/melody/master/examples/gophers/demo.gif "Demo")](https://github.com/olahol/melody/tree/master/examples/gophers)
+
+```go
+package main
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"github.com/olahol/melody"
+)
+
+type GopherInfo struct {
+	ID, X, Y string
+}
+
+func main() {
+	router := gin.Default()
+	mrouter := melody.New()
+
+	router.GET("/", func(c *gin.Context) {
+		http.ServeFile(c.Writer, c.Request, "index.html")
+	})
+
+	router.GET("/ws", func(c *gin.Context) {
+		mrouter.HandleRequest(c.Writer, c.Request)
+	})
+
+	mrouter.HandleConnect(func(s *melody.Session) {
+		ss, _ := mrouter.Sessions()
+
+		for _, o := range ss {
+			info := o.MustGet("info").(*GopherInfo)
+			s.Write([]byte("set " + info.ID + " " + info.X + " " + info.Y))
+		}
+
+		id := uuid.NewString()
+		s.Set("info", &GopherInfo{id, "0", "0"})
+
+		s.Write([]byte("iam " + id))
+	})
+
+	mrouter.HandleDisconnect(func(s *melody.Session) {
+		info := s.MustGet("info").(*GopherInfo)
+		mrouter.BroadcastOthers([]byte("dis "+info.ID), s)
+	})
+
+	mrouter.HandleMessage(func(s *melody.Session, msg []byte) {
+		p := strings.Split(string(msg), " ")
+		if len(p) == 2 {
+			info := s.MustGet("info").(*GopherInfo)
+			info.X = p[0]
+			info.Y = p[1]
+			mrouter.BroadcastOthers([]byte("set "+info.ID+" "+info.X+" "+info.Y), s)
+		}
+	})
+
+	router.Run(":5000")
+}
+```
+
 ### [More examples](https://github.com/olahol/melody/tree/master/examples)
 
 ## [Documentation](https://godoc.org/github.com/olahol/melody)