mirror of
https://github.com/astaxie/beego.git
synced 2024-12-18 14:50:48 +00:00
409 lines
11 KiB
Go
409 lines
11 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
|
||
//
|
||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
// you may not use this file except in compliance with the License.
|
||
// You may obtain a copy of the License at
|
||
//
|
||
// http://www.apache.org/licenses/LICENSE-2.0
|
||
//
|
||
// Unless required by applicable law or agreed to in writing, software
|
||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
// See the License for the specific language governing permissions and
|
||
// limitations under the License.
|
||
|
||
package context
|
||
|
||
import (
|
||
"bytes"
|
||
"encoding/json"
|
||
"encoding/xml"
|
||
"errors"
|
||
"fmt"
|
||
"html/template"
|
||
"io"
|
||
"mime"
|
||
"net/http"
|
||
"net/url"
|
||
"os"
|
||
"path/filepath"
|
||
"strconv"
|
||
"strings"
|
||
"time"
|
||
|
||
yaml "gopkg.in/yaml.v2"
|
||
)
|
||
|
||
// BeegoOutput does work for sending response header.
|
||
type BeegoOutput struct {
|
||
Context *Context
|
||
Status int
|
||
EnableGzip bool
|
||
}
|
||
|
||
// NewOutput returns new BeegoOutput.
|
||
// it contains nothing now.
|
||
func NewOutput() *BeegoOutput {
|
||
return &BeegoOutput{}
|
||
}
|
||
|
||
// Reset init BeegoOutput
|
||
func (output *BeegoOutput) Reset(ctx *Context) {
|
||
output.Context = ctx
|
||
output.Status = 0
|
||
}
|
||
|
||
// Header sets response header item string via given key.
|
||
func (output *BeegoOutput) Header(key, val string) {
|
||
output.Context.ResponseWriter.Header().Set(key, val)
|
||
}
|
||
|
||
// Body sets response body content.
|
||
// if EnableGzip, compress content string.
|
||
// it sends out response body directly.
|
||
func (output *BeegoOutput) Body(content []byte) error {
|
||
var encoding string
|
||
var buf = &bytes.Buffer{}
|
||
if output.EnableGzip {
|
||
encoding = ParseEncoding(output.Context.Request)
|
||
}
|
||
if b, n, _ := WriteBody(encoding, buf, content); b {
|
||
output.Header("Content-Encoding", n)
|
||
output.Header("Content-Length", strconv.Itoa(buf.Len()))
|
||
} else {
|
||
output.Header("Content-Length", strconv.Itoa(len(content)))
|
||
}
|
||
// Write status code if it has been set manually
|
||
// Set it to 0 afterwards to prevent "multiple response.WriteHeader calls"
|
||
if output.Status != 0 {
|
||
output.Context.ResponseWriter.WriteHeader(output.Status)
|
||
output.Status = 0
|
||
} else {
|
||
output.Context.ResponseWriter.Started = true
|
||
}
|
||
io.Copy(output.Context.ResponseWriter, buf)
|
||
return nil
|
||
}
|
||
|
||
// Cookie sets cookie value via given key.
|
||
// others are ordered as cookie's max age time, path,domain, secure and httponly.
|
||
func (output *BeegoOutput) Cookie(name string, value string, others ...interface{}) {
|
||
var b bytes.Buffer
|
||
fmt.Fprintf(&b, "%s=%s", sanitizeName(name), sanitizeValue(value))
|
||
|
||
//fix cookie not work in IE
|
||
if len(others) > 0 {
|
||
var maxAge int64
|
||
|
||
switch v := others[0].(type) {
|
||
case int:
|
||
maxAge = int64(v)
|
||
case int32:
|
||
maxAge = int64(v)
|
||
case int64:
|
||
maxAge = v
|
||
}
|
||
|
||
switch {
|
||
case maxAge > 0:
|
||
fmt.Fprintf(&b, "; Expires=%s; Max-Age=%d", time.Now().Add(time.Duration(maxAge)*time.Second).UTC().Format(time.RFC1123), maxAge)
|
||
case maxAge < 0:
|
||
fmt.Fprintf(&b, "; Max-Age=0")
|
||
}
|
||
}
|
||
|
||
// the settings below
|
||
// Path, Domain, Secure, HttpOnly
|
||
// can use nil skip set
|
||
|
||
// default "/"
|
||
if len(others) > 1 {
|
||
if v, ok := others[1].(string); ok && len(v) > 0 {
|
||
fmt.Fprintf(&b, "; Path=%s", sanitizeValue(v))
|
||
}
|
||
} else {
|
||
fmt.Fprintf(&b, "; Path=%s", "/")
|
||
}
|
||
|
||
// default empty
|
||
if len(others) > 2 {
|
||
if v, ok := others[2].(string); ok && len(v) > 0 {
|
||
fmt.Fprintf(&b, "; Domain=%s", sanitizeValue(v))
|
||
}
|
||
}
|
||
|
||
// default empty
|
||
if len(others) > 3 {
|
||
var secure bool
|
||
switch v := others[3].(type) {
|
||
case bool:
|
||
secure = v
|
||
default:
|
||
if others[3] != nil {
|
||
secure = true
|
||
}
|
||
}
|
||
if secure {
|
||
fmt.Fprintf(&b, "; Secure")
|
||
}
|
||
}
|
||
|
||
// default false. for session cookie default true
|
||
if len(others) > 4 {
|
||
if v, ok := others[4].(bool); ok && v {
|
||
fmt.Fprintf(&b, "; HttpOnly")
|
||
}
|
||
}
|
||
|
||
output.Context.ResponseWriter.Header().Add("Set-Cookie", b.String())
|
||
}
|
||
|
||
var cookieNameSanitizer = strings.NewReplacer("\n", "-", "\r", "-")
|
||
|
||
func sanitizeName(n string) string {
|
||
return cookieNameSanitizer.Replace(n)
|
||
}
|
||
|
||
var cookieValueSanitizer = strings.NewReplacer("\n", " ", "\r", " ", ";", " ")
|
||
|
||
func sanitizeValue(v string) string {
|
||
return cookieValueSanitizer.Replace(v)
|
||
}
|
||
|
||
func jsonRenderer(value interface{}) Renderer {
|
||
return rendererFunc(func(ctx *Context) {
|
||
ctx.Output.JSON(value, false, false)
|
||
})
|
||
}
|
||
|
||
func errorRenderer(err error) Renderer {
|
||
return rendererFunc(func(ctx *Context) {
|
||
ctx.Output.SetStatus(500)
|
||
ctx.Output.Body([]byte(err.Error()))
|
||
})
|
||
}
|
||
|
||
// JSON writes json to response body.
|
||
// if encoding is true, it converts utf-8 to \u0000 type.
|
||
func (output *BeegoOutput) JSON(data interface{}, hasIndent bool, encoding bool) error {
|
||
output.Header("Content-Type", "application/json; charset=utf-8")
|
||
var content []byte
|
||
var err error
|
||
if hasIndent {
|
||
content, err = json.MarshalIndent(data, "", " ")
|
||
} else {
|
||
content, err = json.Marshal(data)
|
||
}
|
||
if err != nil {
|
||
http.Error(output.Context.ResponseWriter, err.Error(), http.StatusInternalServerError)
|
||
return err
|
||
}
|
||
if encoding {
|
||
content = []byte(stringsToJSON(string(content)))
|
||
}
|
||
return output.Body(content)
|
||
}
|
||
|
||
// YAML writes yaml to response body.
|
||
func (output *BeegoOutput) YAML(data interface{}) error {
|
||
output.Header("Content-Type", "application/x-yaml; charset=utf-8")
|
||
var content []byte
|
||
var err error
|
||
content, err = yaml.Marshal(data)
|
||
if err != nil {
|
||
http.Error(output.Context.ResponseWriter, err.Error(), http.StatusInternalServerError)
|
||
return err
|
||
}
|
||
return output.Body(content)
|
||
}
|
||
|
||
// JSONP writes jsonp to response body.
|
||
func (output *BeegoOutput) JSONP(data interface{}, hasIndent bool) error {
|
||
output.Header("Content-Type", "application/javascript; charset=utf-8")
|
||
var content []byte
|
||
var err error
|
||
if hasIndent {
|
||
content, err = json.MarshalIndent(data, "", " ")
|
||
} else {
|
||
content, err = json.Marshal(data)
|
||
}
|
||
if err != nil {
|
||
http.Error(output.Context.ResponseWriter, err.Error(), http.StatusInternalServerError)
|
||
return err
|
||
}
|
||
callback := output.Context.Input.Query("callback")
|
||
if callback == "" {
|
||
return errors.New(`"callback" parameter required`)
|
||
}
|
||
callback = template.JSEscapeString(callback)
|
||
callbackContent := bytes.NewBufferString(" if(window." + callback + ")" + callback)
|
||
callbackContent.WriteString("(")
|
||
callbackContent.Write(content)
|
||
callbackContent.WriteString(");\r\n")
|
||
return output.Body(callbackContent.Bytes())
|
||
}
|
||
|
||
// XML writes xml string to response body.
|
||
func (output *BeegoOutput) XML(data interface{}, hasIndent bool) error {
|
||
output.Header("Content-Type", "application/xml; charset=utf-8")
|
||
var content []byte
|
||
var err error
|
||
if hasIndent {
|
||
content, err = xml.MarshalIndent(data, "", " ")
|
||
} else {
|
||
content, err = xml.Marshal(data)
|
||
}
|
||
if err != nil {
|
||
http.Error(output.Context.ResponseWriter, err.Error(), http.StatusInternalServerError)
|
||
return err
|
||
}
|
||
return output.Body(content)
|
||
}
|
||
|
||
// ServeFormatted serve YAML, XML OR JSON, depending on the value of the Accept header
|
||
func (output *BeegoOutput) ServeFormatted(data interface{}, hasIndent bool, hasEncode ...bool) {
|
||
accept := output.Context.Input.Header("Accept")
|
||
switch accept {
|
||
case ApplicationYAML:
|
||
output.YAML(data)
|
||
case ApplicationXML, TextXML:
|
||
output.XML(data, hasIndent)
|
||
default:
|
||
output.JSON(data, hasIndent, len(hasEncode) > 0 && hasEncode[0])
|
||
}
|
||
}
|
||
|
||
// Download forces response for download file.
|
||
// it prepares the download response header automatically.
|
||
func (output *BeegoOutput) Download(file string, filename ...string) {
|
||
// check get file error, file not found or other error.
|
||
if _, err := os.Stat(file); err != nil {
|
||
http.ServeFile(output.Context.ResponseWriter, output.Context.Request, file)
|
||
return
|
||
}
|
||
|
||
var fName string
|
||
if len(filename) > 0 && filename[0] != "" {
|
||
fName = filename[0]
|
||
} else {
|
||
fName = filepath.Base(file)
|
||
}
|
||
//https://tools.ietf.org/html/rfc6266#section-4.3
|
||
fn := url.PathEscape(fName)
|
||
if fName == fn {
|
||
fn = "filename=" + fn
|
||
} else {
|
||
/**
|
||
The parameters "filename" and "filename*" differ only in that
|
||
"filename*" uses the encoding defined in [RFC5987], allowing the use
|
||
of characters not present in the ISO-8859-1 character set
|
||
([ISO-8859-1]).
|
||
*/
|
||
fn = "filename=" + fName + "; filename*=utf-8''" + fn
|
||
}
|
||
output.Header("Content-Disposition", "attachment; "+fn)
|
||
output.Header("Content-Description", "File Transfer")
|
||
output.Header("Content-Type", "application/octet-stream")
|
||
output.Header("Content-Transfer-Encoding", "binary")
|
||
output.Header("Expires", "0")
|
||
output.Header("Cache-Control", "must-revalidate")
|
||
output.Header("Pragma", "public")
|
||
http.ServeFile(output.Context.ResponseWriter, output.Context.Request, file)
|
||
}
|
||
|
||
// ContentType sets the content type from ext string.
|
||
// MIME type is given in mime package.
|
||
func (output *BeegoOutput) ContentType(ext string) {
|
||
if !strings.HasPrefix(ext, ".") {
|
||
ext = "." + ext
|
||
}
|
||
ctype := mime.TypeByExtension(ext)
|
||
if ctype != "" {
|
||
output.Header("Content-Type", ctype)
|
||
}
|
||
}
|
||
|
||
// SetStatus sets response status code.
|
||
// It writes response header directly.
|
||
func (output *BeegoOutput) SetStatus(status int) {
|
||
output.Status = status
|
||
}
|
||
|
||
// IsCachable returns boolean of this request is cached.
|
||
// HTTP 304 means cached.
|
||
func (output *BeegoOutput) IsCachable() bool {
|
||
return output.Status >= 200 && output.Status < 300 || output.Status == 304
|
||
}
|
||
|
||
// IsEmpty returns boolean of this request is empty.
|
||
// HTTP 201，204 and 304 means empty.
|
||
func (output *BeegoOutput) IsEmpty() bool {
|
||
return output.Status == 201 || output.Status == 204 || output.Status == 304
|
||
}
|
||
|
||
// IsOk returns boolean of this request runs well.
|
||
// HTTP 200 means ok.
|
||
func (output *BeegoOutput) IsOk() bool {
|
||
return output.Status == 200
|
||
}
|
||
|
||
// IsSuccessful returns boolean of this request runs successfully.
|
||
// HTTP 2xx means ok.
|
||
func (output *BeegoOutput) IsSuccessful() bool {
|
||
return output.Status >= 200 && output.Status < 300
|
||
}
|
||
|
||
// IsRedirect returns boolean of this request is redirection header.
|
||
// HTTP 301,302,307 means redirection.
|
||
func (output *BeegoOutput) IsRedirect() bool {
|
||
return output.Status == 301 || output.Status == 302 || output.Status == 303 || output.Status == 307
|
||
}
|
||
|
||
// IsForbidden returns boolean of this request is forbidden.
|
||
// HTTP 403 means forbidden.
|
||
func (output *BeegoOutput) IsForbidden() bool {
|
||
return output.Status == 403
|
||
}
|
||
|
||
// IsNotFound returns boolean of this request is not found.
|
||
// HTTP 404 means not found.
|
||
func (output *BeegoOutput) IsNotFound() bool {
|
||
return output.Status == 404
|
||
}
|
||
|
||
// IsClientError returns boolean of this request client sends error data.
|
||
// HTTP 4xx means client error.
|
||
func (output *BeegoOutput) IsClientError() bool {
|
||
return output.Status >= 400 && output.Status < 500
|
||
}
|
||
|
||
// IsServerError returns boolean of this server handler errors.
|
||
// HTTP 5xx means server internal error.
|
||
func (output *BeegoOutput) IsServerError() bool {
|
||
return output.Status >= 500 && output.Status < 600
|
||
}
|
||
|
||
func stringsToJSON(str string) string {
|
||
var jsons bytes.Buffer
|
||
for _, r := range str {
|
||
rint := int(r)
|
||
if rint < 128 {
|
||
jsons.WriteRune(r)
|
||
} else {
|
||
jsons.WriteString("\\u")
|
||
if rint < 0x100 {
|
||
jsons.WriteString("00")
|
||
} else if rint < 0x1000 {
|
||
jsons.WriteString("0")
|
||
}
|
||
jsons.WriteString(strconv.FormatInt(int64(rint), 16))
|
||
}
|
||
}
|
||
return jsons.String()
|
||
}
|
||
|
||
// Session sets session item value with given key.
|
||
func (output *BeegoOutput) Session(name interface{}, value interface{}) {
|
||
output.Context.Input.CruSession.Set(name, value)
|
||
}
|