forked from mirror/gin
97 lines
1.7 KiB
Go
97 lines
1.7 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
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// Use of this source code is governed by a MIT style
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// license that can be found in the LICENSE file.
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package gin
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import (
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"bufio"
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"log"
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"net"
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"net/http"
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)
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const (
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noWritten = -1
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defaultStatus = 200
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)
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type (
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ResponseWriter interface {
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http.ResponseWriter
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http.Hijacker
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http.Flusher
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http.CloseNotifier
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Status() int
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Size() int
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Written() bool
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WriteHeaderNow()
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}
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responseWriter struct {
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http.ResponseWriter
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size int
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status int
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}
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)
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func (w *responseWriter) reset(writer http.ResponseWriter) {
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w.ResponseWriter = writer
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w.size = noWritten
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w.status = defaultStatus
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}
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func (w *responseWriter) WriteHeader(code int) {
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if code > 0 {
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w.status = code
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if w.Written() {
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log.Println("[GIN] WARNING. Headers were already written!")
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}
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}
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}
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func (w *responseWriter) WriteHeaderNow() {
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if !w.Written() {
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w.size = 0
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w.ResponseWriter.WriteHeader(w.status)
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}
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}
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func (w *responseWriter) Write(data []byte) (n int, err error) {
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w.WriteHeaderNow()
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n, err = w.ResponseWriter.Write(data)
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w.size += n
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return
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}
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func (w *responseWriter) Status() int {
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return w.status
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}
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func (w *responseWriter) Size() int {
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return w.size
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}
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func (w *responseWriter) Written() bool {
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return w.size != noWritten
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}
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// Implements the http.Hijacker interface
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func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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if w.size < 0 {
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w.size = 0
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}
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return w.ResponseWriter.(http.Hijacker).Hijack()
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}
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// Implements the http.CloseNotify interface
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func (w *responseWriter) CloseNotify() <-chan bool {
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return w.ResponseWriter.(http.CloseNotifier).CloseNotify()
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}
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// Implements the http.Flush interface
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func (w *responseWriter) Flush() {
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w.ResponseWriter.(http.Flusher).Flush()
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}
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