Added CopyTo() to Request and Response

header.go

@@ -105,6 +105,7 @@ func (h *RequestHeader) Clear() {
 
 // CopyTo copies all the headers to dst.
 func (h *ResponseHeader) CopyTo(dst *ResponseHeader) {
+	dst.Clear()
 	dst.StatusCode = h.StatusCode
 	dst.ContentLength = h.ContentLength
 	dst.ConnectionClose = h.ConnectionClose
@@ -115,6 +116,7 @@ func (h *ResponseHeader) CopyTo(dst *ResponseHeader) {
 
 // CopyTo copies all the headers to dst.
 func (h *RequestHeader) CopyTo(dst *RequestHeader) {
+	dst.Clear()
 	dst.Method = append(dst.Method[:0], h.Method...)
 	dst.RequestURI = append(dst.RequestURI[:0], h.RequestURI...)
 	dst.ContentLength = h.ContentLength

http.go

@@ -11,7 +11,8 @@ import (
 
 // Request represents HTTP request.
 //
-// It is forbidden copying Request instances. Create new instances instead.
+// It is forbidden copying Request instances. Create new instances
+// and use CopyTo() instead.
 type Request struct {
 	// Request header
 	Header RequestHeader
@@ -35,7 +36,8 @@ type Request struct {
 
 // Response represents HTTP response.
 //
-// It is forbidden copying Response instances. Create new instances instead.
+// It is forbidden copying Response instances. Create new instances
+// and use CopyTo() instead.
 type Response struct {
 	// Response header
 	Header ResponseHeader
@@ -51,6 +53,27 @@ type Response struct {
 	timeoutTimer *time.Timer
 }
 
+// CopyTo copies req contents to dst.
+func (req *Request) CopyTo(dst *Request) {
+	dst.Clear()
+	req.Header.CopyTo(&dst.Header)
+	dst.Body = append(dst.Body[:0], req.Body...)
+	if req.parsedURI {
+		dst.ParseURI()
+	}
+	if req.parsedPostArgs {
+		dst.ParsePostArgs()
+	}
+}
+
+// CopyTo copies resp contents to dst.
+func (resp *Response) CopyTo(dst *Response) {
+	dst.Clear()
+	resp.Header.CopyTo(&resp.Header)
+	dst.Body = append(dst.Body[:0], resp.Body...)
+	dst.SkipBody = resp.SkipBody
+}
+
 // ParseURI parses request uri and fills Request.URI.
 func (req *Request) ParseURI() {
 	if req.parsedURI {