21e53c0db6
- "written" boolean is not longer needed - size is reseted - addition instead of assignation
101 lines
1.9 KiB
Go
101 lines
1.9 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
|
|
// Use of this source code is governed by a MIT style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package gin
|
|
|
|
import (
|
|
"bufio"
|
|
"errors"
|
|
"log"
|
|
"net"
|
|
"net/http"
|
|
)
|
|
|
|
const (
|
|
NoWritten = -1
|
|
)
|
|
|
|
type (
|
|
ResponseWriter interface {
|
|
http.ResponseWriter
|
|
http.Hijacker
|
|
http.Flusher
|
|
http.CloseNotifier
|
|
|
|
Status() int
|
|
Size() int
|
|
Written() bool
|
|
WriteHeaderNow()
|
|
}
|
|
|
|
responseWriter struct {
|
|
http.ResponseWriter
|
|
status int
|
|
size int
|
|
}
|
|
)
|
|
|
|
func (w *responseWriter) reset(writer http.ResponseWriter) {
|
|
w.ResponseWriter = writer
|
|
w.status = 200
|
|
w.size = NoWritten
|
|
}
|
|
|
|
func (w *responseWriter) WriteHeader(code int) {
|
|
if code > 0 {
|
|
w.status = code
|
|
if w.Written() {
|
|
log.Println("[GIN] WARNING. Headers were already written!")
|
|
}
|
|
}
|
|
}
|
|
|
|
func (w *responseWriter) WriteHeaderNow() {
|
|
if !w.Written() {
|
|
w.size = 0
|
|
w.ResponseWriter.WriteHeader(w.status)
|
|
}
|
|
}
|
|
|
|
func (w *responseWriter) Write(data []byte) (n int, err error) {
|
|
w.WriteHeaderNow()
|
|
n, err = w.ResponseWriter.Write(data)
|
|
w.size += n
|
|
return
|
|
}
|
|
|
|
func (w *responseWriter) Status() int {
|
|
return w.status
|
|
}
|
|
|
|
func (w *responseWriter) Size() int {
|
|
return w.size
|
|
}
|
|
|
|
func (w *responseWriter) Written() bool {
|
|
return w.size != NoWritten
|
|
}
|
|
|
|
// Implements the http.Hijacker interface
|
|
func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
|
hijacker, ok := w.ResponseWriter.(http.Hijacker)
|
|
if !ok {
|
|
return nil, nil, errors.New("the ResponseWriter doesn't support the Hijacker interface")
|
|
}
|
|
return hijacker.Hijack()
|
|
}
|
|
|
|
// Implements the http.CloseNotify interface
|
|
func (w *responseWriter) CloseNotify() <-chan bool {
|
|
return w.ResponseWriter.(http.CloseNotifier).CloseNotify()
|
|
}
|
|
|
|
// Implements the http.Flush interface
|
|
func (w *responseWriter) Flush() {
|
|
flusher, ok := w.ResponseWriter.(http.Flusher)
|
|
if ok {
|
|
flusher.Flush()
|
|
}
|
|
}
|