diff --git a/code/client/conn/send_code.go b/code/client/conn/send_code.go
index 9192dd5..e19d4ef 100644
--- a/code/client/conn/send_code.go
+++ b/code/client/conn/send_code.go
@@ -32,7 +32,7 @@ func (conn *Conn) SendCodeRequest(to, linkID string, requestID uint64,
 			RequestId: requestID,
 			Method:    method,
 			Uri:       uri,
-			Body:      body,
+			Body:      dup(body),
 			Header:    makeCodeHeader(header),
 		},
 	}
@@ -87,7 +87,7 @@ func (conn *Conn) SendCodeResponseBody(to, linkID string, requestID uint64,
 			RequestId: requestID,
 			Index:     idx,
 			Mask:      mask,
-			Body:      data,
+			Body:      dup(data),
 		},
 	}
 	select {
diff --git a/code/client/conn/send_shell.go b/code/client/conn/send_shell.go
index feb67b5..91c1756 100644
--- a/code/client/conn/send_shell.go
+++ b/code/client/conn/send_shell.go
@@ -9,11 +9,6 @@ import (
 
 // SendShellData send shell data
 func (conn *Conn) SendShellData(to string, id string, data []byte) uint64 {
-	dup := func(data []byte) []byte {
-		ret := make([]byte, len(data))
-		copy(ret, data)
-		return ret
-	}
 	var msg network.Msg
 	msg.To = to
 	msg.XType = network.Msg_shell_data
diff --git a/code/client/conn/send_vnc.go b/code/client/conn/send_vnc.go
index 218be67..1603fc7 100644
--- a/code/client/conn/send_vnc.go
+++ b/code/client/conn/send_vnc.go
@@ -10,11 +10,6 @@ import (
 // SendVNCImage send vnc image data
 func (conn *Conn) SendVNCImage(to string, id string, screen, rect image.Rectangle,
 	encode network.VncImageEncoding, data []byte) {
-	dup := func(data []byte) []byte {
-		ret := make([]byte, len(data))
-		copy(ret, data)
-		return ret
-	}
 	var msg network.Msg
 	msg.To = to
 	msg.XType = network.Msg_vnc_image
diff --git a/code/client/conn/utils.go b/code/client/conn/utils.go
new file mode 100644
index 0000000..fe8ce12
--- /dev/null
+++ b/code/client/conn/utils.go
@@ -0,0 +1,7 @@
+package conn
+
+func dup(data []byte) []byte {
+	ret := make([]byte, len(data))
+	copy(ret, data)
+	return ret
+}
diff --git a/code/client/rule/code/h_forward_request.go b/code/client/rule/code/h_forward_request.go
index 260ce69..d9660c5 100644
--- a/code/client/rule/code/h_forward_request.go
+++ b/code/client/rule/code/h_forward_request.go
@@ -2,15 +2,12 @@ package code
 
 import (
 	"bytes"
-	"compress/gzip"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 
 	"github.com/lwch/logging"
 	"github.com/lwch/natpass/code/network"
-	"github.com/lwch/runtime"
 )
 
 func (code *Code) handleRequest(workspace *Workspace, w http.ResponseWriter, r *http.Request) {
@@ -20,8 +17,6 @@ func (code *Code) handleRequest(workspace *Workspace, w http.ResponseWriter, r *
 		http.Error(w, err.Error(), http.StatusBadGateway)
 		return
 	}
-	logging.Info("send request [%s] [%s] successed, request_id=%d",
-		workspace.id, workspace.name, reqID)
 	defer workspace.closeMessage(reqID)
 	resp := workspace.onResponse(reqID)
 	if resp == nil {
@@ -30,8 +25,6 @@ func (code *Code) handleRequest(workspace *Workspace, w http.ResponseWriter, r *
 		http.Error(w, "no response", http.StatusInternalServerError)
 		return
 	}
-	logging.Info("wait response [%s] [%s] successed, request_id=%d",
-		workspace.id, workspace.name, reqID)
 
 	if resp.GetXType() != network.Msg_code_response_hdr {
 		logging.Error("got invalid message type [%s] [%s]: %s",
@@ -50,7 +43,6 @@ func (code *Code) handleRequest(workspace *Workspace, w http.ResponseWriter, r *
 	w.WriteHeader(int(hdr.GetCode()))
 
 	var idx uint32
-	var buf []byte
 	for {
 		msg := workspace.onResponse(reqID)
 		if msg == nil {
@@ -75,22 +67,12 @@ func (code *Code) handleRequest(workspace *Workspace, w http.ResponseWriter, r *
 			http.Error(w, fmt.Sprintf("read error: %s", string(resp.GetBody())), http.StatusResetContent)
 			return
 		}
-		buf = append(buf, resp.GetBody()...)
-		// _, err = buf.Write(resp.GetBody())
-		// if err != nil {
-		// 	logging.Error("write body: %v", err)
-		// 	return
-		// }
+		_, err = io.Copy(w, bytes.NewReader(resp.GetBody()))
+		if err != nil {
+			logging.Error("write body: %v", err)
+			return
+		}
 		if resp.GetMask()&2 > 0 {
-			_, err = io.Copy(w, bytes.NewReader(buf))
-			if err != nil {
-				logging.Info("header: %s", hdr.String())
-				r, err := gzip.NewReader(bytes.NewReader(buf))
-				runtime.Assert(err)
-				data, err := ioutil.ReadAll(r)
-				runtime.Assert(err)
-				logging.Error("write body: %v\n%s", err, string(data))
-			}
 			return
 		}
 		idx++
diff --git a/code/client/rule/code/workspace_local_request.go b/code/client/rule/code/workspace_local_request.go
index 06e4ded..85ef5b1 100644
--- a/code/client/rule/code/workspace_local_request.go
+++ b/code/client/rule/code/workspace_local_request.go
@@ -17,7 +17,7 @@ func (ws *Workspace) SendRequest(r *http.Request) (uint64, error) {
 		return 0, err
 	}
 	ws.Lock()
-	ws.onMessage[reqID] = make(chan *network.Msg)
+	ws.onMessage[reqID] = make(chan *network.Msg, 1024)
 	ws.Unlock()
 	send := ws.remote.SendCodeRequest(ws.target, ws.id, reqID,
 		r.Method, r.URL.RequestURI(), body, r.Header)
diff --git a/go.sum b/go.sum
index c95efc7..6fa1e6e 100644
--- a/go.sum
+++ b/go.sum
@@ -49,8 +49,6 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=
-golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220721230656-c6bc011c0c49 h1:TMjZDarEwf621XDryfitp/8awEhiZNiwgphKlTMGRIg=
 golang.org/x/sys v0.0.0-20220721230656-c6bc011c0c49/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=