response_writer.go — gin Source File

Source Code

// 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"
	"io"
	"net"
	"net/http"
)

const (
	noWritten     = -1
	defaultStatus = http.StatusOK
)

var errHijackAlreadyWritten = errors.New("gin: response body already written")

// ResponseWriter ...
type ResponseWriter interface {
	http.ResponseWriter
	http.Hijacker
	http.Flusher
	http.CloseNotifier

	// Status returns the HTTP response status code of the current request.
	Status() int

	// Size returns the number of bytes already written into the response http body.
	// See Written()
	Size() int

	// WriteString writes the string into the response body.
	WriteString(string) (int, error)

	// Written returns true if the response body was already written.
	Written() bool

	// WriteHeaderNow forces to write the http header (status code + headers).
	WriteHeaderNow()

	// Pusher get the http.Pusher for server push
	Pusher() http.Pusher
}

type responseWriter struct {
	http.ResponseWriter
	size   int
	status int
}

var _ ResponseWriter = (*responseWriter)(nil)

func (w *responseWriter) Unwrap() http.ResponseWriter {
	return w.ResponseWriter
}

// ... (82 more lines)