/
ghttp_response.go
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/
ghttp_response.go
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// Copyright 2017 gf Author(https://github.com/csrgxtu/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/csrgxtu/gf.
//
package ghttp
import (
"bytes"
"fmt"
"net/http"
"github.com/csrgxtu/gf/os/gres"
"github.com/csrgxtu/gf/os/gfile"
)
// Response is the http response manager.
// Note that it implements the http.ResponseWriter interface with buffering feature.
type Response struct {
*ResponseWriter // Underlying ResponseWriter.
Server *Server // Parent server.
Writer *ResponseWriter // Alias of ResponseWriter.
Request *Request // According request.
}
// newResponse creates and returns a new Response object.
func newResponse(s *Server, w http.ResponseWriter) *Response {
r := &Response{
Server: s,
ResponseWriter: &ResponseWriter{
writer: w,
buffer: bytes.NewBuffer(nil),
},
}
r.Writer = r.ResponseWriter
return r
}
// ServeFile serves the file to the response.
func (r *Response) ServeFile(path string, allowIndex ...bool) {
serveFile := (*StaticFile)(nil)
if file := gres.Get(path); file != nil {
serveFile = &StaticFile{
File: file,
IsDir: file.FileInfo().IsDir(),
}
} else {
path = gfile.RealPath(path)
if path == "" {
r.WriteStatus(http.StatusNotFound)
return
}
serveFile = &StaticFile{Path: path}
}
r.Server.serveFile(r.Request, serveFile, allowIndex...)
}
// ServeFileDownload serves file downloading to the response.
func (r *Response) ServeFileDownload(path string, name ...string) {
serveFile := (*StaticFile)(nil)
downloadName := ""
if len(name) > 0 {
downloadName = name[0]
}
if file := gres.Get(path); file != nil {
serveFile = &StaticFile{
File: file,
IsDir: file.FileInfo().IsDir(),
}
if downloadName == "" {
downloadName = gfile.Basename(file.Name())
}
} else {
path = gfile.RealPath(path)
if path == "" {
r.WriteStatus(http.StatusNotFound)
return
}
serveFile = &StaticFile{Path: path}
if downloadName == "" {
downloadName = gfile.Basename(path)
}
}
r.Header().Set("Content-Type", "application/force-download")
r.Header().Set("Accept-Ranges", "bytes")
r.Header().Set("Content-Disposition", fmt.Sprintf(`attachment;filename="%s"`, downloadName))
r.Server.serveFile(r.Request, serveFile)
}
// RedirectTo redirects client to another location.
// The optional parameter <code> specifies the http status code for redirecting,
// which commonly can be 301 or 302. It's 302 in default.
func (r *Response) RedirectTo(location string, code ...int) {
r.Header().Set("Location", location)
if len(code) > 0 {
r.WriteHeader(code[0])
} else {
r.WriteHeader(http.StatusFound)
}
r.Request.Exit()
}
// RedirectBack redirects client back to referer.
// The optional parameter <code> specifies the http status code for redirecting,
// which commonly can be 301 or 302. It's 302 in default.
func (r *Response) RedirectBack(code ...int) {
r.RedirectTo(r.Request.GetReferer(), code...)
}
// BufferString returns the buffered content as []byte.
func (r *Response) Buffer() []byte {
return r.buffer.Bytes()
}
// BufferString returns the buffered content as string.
func (r *Response) BufferString() string {
return r.buffer.String()
}
// BufferLength returns the length of the buffered content.
func (r *Response) BufferLength() int {
return r.buffer.Len()
}
// SetBuffer overwrites the buffer with <data>.
func (r *Response) SetBuffer(data []byte) {
r.buffer.Reset()
r.buffer.Write(data)
}
// ClearBuffer clears the response buffer.
func (r *Response) ClearBuffer() {
r.buffer.Reset()
}
// Output outputs the buffer content to the client and clears the buffer.
func (r *Response) Flush() {
if r.Server.config.ServerAgent != "" {
r.Header().Set("Server", r.Server.config.ServerAgent)
}
r.Writer.Flush()
}