diff --git a/README.md b/README.md
index 8ec3ed8..ab70a65 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,104 @@
-# wsgate-server
+# wsgate-server - a websocket to tcp proxy/bridge server
+
+```
+[client]
+|
+| TCP
+|
+[wsgate-client] (https://github.com/kazeburo/wsgate-client)
+|
+| websocket (wss)
+|
+[reverse proxy] if required
+|
+| websocket (ws)
+|
+[wsgate-server] (https://github.com/kazeburo/wsgate-server)
+|
+| TCP
+|
+[server]
+```
+
+## Example
+
+### wsgate-server
+
+map-server.txt
+
+```
+mysql,127.0.0.1:3306
+ssh,127.0.0.1:22
+```
+run server
+
+```
+$ wsgate-server --listen 0.0.0.0:8086 --map map-server.txt
+```
+
+### wsgate-client
+
+map-client.txt
+
+```
+127.0.0.1:8306,https://example.com/proxy/mysql
+127.0.0.1:8022,https://example.com/proxy/ssh
+```
+
+run client server
+
+```
+$ wsgate-client --map map-client.txt
+```
+
+### client
+
+```
+# mysql
+$ mysql -h 127.0.0.1 --port 8306 --user ...
+
+# ssh
+ssh -p 8022 user@127.0.0.1
+```
+
+### Using go-sql-driver/mysql
+
+It's able to use RegisterDial to connect wsgate-server.
+
+```
+mysql.RegisterDial("websocket", func(url string) (net.Conn, error) {
+	wsURL := strings.Replace(url, "http", "ws", 1)
+	wsConf, err := websocket.NewConfig(wsURL, url)
+	if err != nil {
+		log.Fatalf("NewConfig failed: %v", err)
+	}
+	conn, err := websocket.DialConfig(wsConf)
+	if err != nil {
+		log.Fatalf("Dial to %q fail: %v", url, err)
+	}
+	conn.PayloadType = websocket.BinaryFrame
+	return conn, err
+})
+
+db, err := sql.Open("mysql", "yyyy:xxx@websocket(https://example.com/proxy/mysql)/test")
+```
+
+## Usage
+
+```
+Usage of ./wsgate-server:
+  -dial_timeout duration
+        Dial timeout. (default 10s)
+  -handshake_timeout duration
+        Handshake timeout. (default 10s)
+  -listen string
+        Address to listen to. (default "127.0.0.1:8086")
+  -map string
+        path and proxy host mapping file
+  -public-key string
+        public key for signing auth header
+  -version
+        show version
+  -write_timeout duration
+        Write timeout. (default 10s)
+```
diff --git a/wsgate-server.go b/wsgate-server.go
index 9cf2b52..fce43f8 100644
--- a/wsgate-server.go
+++ b/wsgate-server.go
@@ -95,9 +95,12 @@ func handleProxy(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		hasError = true
 		s.Close()
-		log.Printf("Upgrade: %v", err)
+		log.Printf("Failed to Upgrade: %v", err)
 		return
 	}
+	log.Printf("status:Connected dest:%s upstream:%s x-forwarded-for:%s remote_addr:%s",
+		proxyDest, upstream, r.Header.Get("X-Forwarded-For"),
+		r.RemoteAddr)
 
 	defer func() {
 		status := "Suceeded"