forgejo/vendor/gopkg.in/macaron.v1/context.go

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2016-11-04 01:16:01 +03:00
// Copyright 2014 The Macaron Authors
//
// 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 macaron
import (
"crypto/md5"
"encoding/hex"
"html/template"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"reflect"
"strconv"
"strings"
"time"
"github.com/Unknwon/com"
"github.com/go-macaron/inject"
)
// Locale reprents a localization interface.
type Locale interface {
Language() string
Tr(string, ...interface{}) string
}
// RequestBody represents a request body.
type RequestBody struct {
reader io.ReadCloser
}
// Bytes reads and returns content of request body in bytes.
func (rb *RequestBody) Bytes() ([]byte, error) {
return ioutil.ReadAll(rb.reader)
}
// String reads and returns content of request body in string.
func (rb *RequestBody) String() (string, error) {
data, err := rb.Bytes()
return string(data), err
}
// ReadCloser returns a ReadCloser for request body.
func (rb *RequestBody) ReadCloser() io.ReadCloser {
return rb.reader
}
// Request represents an HTTP request received by a server or to be sent by a client.
type Request struct {
*http.Request
}
func (r *Request) Body() *RequestBody {
return &RequestBody{r.Request.Body}
}
// Context represents the runtime context of current request of Macaron instance.
// It is the integration of most frequently used middlewares and helper methods.
type Context struct {
inject.Injector
handlers []Handler
action Handler
index int
*Router
Req Request
Resp ResponseWriter
params Params
Render
Locale
Data map[string]interface{}
}
func (c *Context) handler() Handler {
if c.index < len(c.handlers) {
return c.handlers[c.index]
}
if c.index == len(c.handlers) {
return c.action
}
panic("invalid index for context handler")
}
func (c *Context) Next() {
c.index += 1
c.run()
}
func (c *Context) Written() bool {
return c.Resp.Written()
}
func (c *Context) run() {
for c.index <= len(c.handlers) {
vals, err := c.Invoke(c.handler())
if err != nil {
panic(err)
}
c.index += 1
// if the handler returned something, write it to the http response
if len(vals) > 0 {
ev := c.GetVal(reflect.TypeOf(ReturnHandler(nil)))
handleReturn := ev.Interface().(ReturnHandler)
handleReturn(c, vals)
}
if c.Written() {
return
}
}
}
// RemoteAddr returns more real IP address.
func (ctx *Context) RemoteAddr() string {
addr := ctx.Req.Header.Get("X-Real-IP")
if len(addr) == 0 {
addr = ctx.Req.Header.Get("X-Forwarded-For")
if addr == "" {
addr = ctx.Req.RemoteAddr
if i := strings.LastIndex(addr, ":"); i > -1 {
addr = addr[:i]
}
}
}
return addr
}
func (ctx *Context) renderHTML(status int, setName, tplName string, data ...interface{}) {
if len(data) <= 0 {
ctx.Render.HTMLSet(status, setName, tplName, ctx.Data)
} else if len(data) == 1 {
ctx.Render.HTMLSet(status, setName, tplName, data[0])
} else {
ctx.Render.HTMLSet(status, setName, tplName, data[0], data[1].(HTMLOptions))
}
}
// HTML calls Render.HTML but allows less arguments.
func (ctx *Context) HTML(status int, name string, data ...interface{}) {
ctx.renderHTML(status, DEFAULT_TPL_SET_NAME, name, data...)
}
// HTML calls Render.HTMLSet but allows less arguments.
func (ctx *Context) HTMLSet(status int, setName, tplName string, data ...interface{}) {
ctx.renderHTML(status, setName, tplName, data...)
}
func (ctx *Context) Redirect(location string, status ...int) {
code := http.StatusFound
if len(status) == 1 {
code = status[0]
}
http.Redirect(ctx.Resp, ctx.Req.Request, location, code)
}
// Maximum amount of memory to use when parsing a multipart form.
// Set this to whatever value you prefer; default is 10 MB.
var MaxMemory = int64(1024 * 1024 * 10)
func (ctx *Context) parseForm() {
if ctx.Req.Form != nil {
return
}
contentType := ctx.Req.Header.Get(_CONTENT_TYPE)
if (ctx.Req.Method == "POST" || ctx.Req.Method == "PUT") &&
len(contentType) > 0 && strings.Contains(contentType, "multipart/form-data") {
ctx.Req.ParseMultipartForm(MaxMemory)
} else {
ctx.Req.ParseForm()
}
}
// Query querys form parameter.
func (ctx *Context) Query(name string) string {
ctx.parseForm()
return ctx.Req.Form.Get(name)
}
// QueryTrim querys and trims spaces form parameter.
func (ctx *Context) QueryTrim(name string) string {
return strings.TrimSpace(ctx.Query(name))
}
// QueryStrings returns a list of results by given query name.
func (ctx *Context) QueryStrings(name string) []string {
ctx.parseForm()
vals, ok := ctx.Req.Form[name]
if !ok {
return []string{}
}
return vals
}
// QueryEscape returns escapred query result.
func (ctx *Context) QueryEscape(name string) string {
return template.HTMLEscapeString(ctx.Query(name))
}
// QueryBool returns query result in bool type.
func (ctx *Context) QueryBool(name string) bool {
v, _ := strconv.ParseBool(ctx.Query(name))
return v
}
// QueryInt returns query result in int type.
func (ctx *Context) QueryInt(name string) int {
return com.StrTo(ctx.Query(name)).MustInt()
}
// QueryInt64 returns query result in int64 type.
func (ctx *Context) QueryInt64(name string) int64 {
return com.StrTo(ctx.Query(name)).MustInt64()
}
// QueryFloat64 returns query result in float64 type.
func (ctx *Context) QueryFloat64(name string) float64 {
v, _ := strconv.ParseFloat(ctx.Query(name), 64)
return v
}
// Params returns value of given param name.
// e.g. ctx.Params(":uid") or ctx.Params("uid")
func (ctx *Context) Params(name string) string {
if len(name) == 0 {
return ""
}
if len(name) > 1 && name[0] != ':' {
name = ":" + name
}
return ctx.params[name]
}
// SetParams sets value of param with given name.
func (ctx *Context) SetParams(name, val string) {
if !strings.HasPrefix(name, ":") {
name = ":" + name
}
ctx.params[name] = val
}
// ParamsEscape returns escapred params result.
// e.g. ctx.ParamsEscape(":uname")
func (ctx *Context) ParamsEscape(name string) string {
return template.HTMLEscapeString(ctx.Params(name))
}
// ParamsInt returns params result in int type.
// e.g. ctx.ParamsInt(":uid")
func (ctx *Context) ParamsInt(name string) int {
return com.StrTo(ctx.Params(name)).MustInt()
}
// ParamsInt64 returns params result in int64 type.
// e.g. ctx.ParamsInt64(":uid")
func (ctx *Context) ParamsInt64(name string) int64 {
return com.StrTo(ctx.Params(name)).MustInt64()
}
// ParamsFloat64 returns params result in int64 type.
// e.g. ctx.ParamsFloat64(":uid")
func (ctx *Context) ParamsFloat64(name string) float64 {
v, _ := strconv.ParseFloat(ctx.Params(name), 64)
return v
}
// GetFile returns information about user upload file by given form field name.
func (ctx *Context) GetFile(name string) (multipart.File, *multipart.FileHeader, error) {
return ctx.Req.FormFile(name)
}
// SaveToFile reads a file from request by field name and saves to given path.
func (ctx *Context) SaveToFile(name, savePath string) error {
fr, _, err := ctx.GetFile(name)
if err != nil {
return err
}
defer fr.Close()
fw, err := os.OpenFile(savePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
if err != nil {
return err
}
defer fw.Close()
_, err = io.Copy(fw, fr)
return err
}
// SetCookie sets given cookie value to response header.
// FIXME: IE support? http://golanghome.com/post/620#reply2
func (ctx *Context) SetCookie(name string, value string, others ...interface{}) {
cookie := http.Cookie{}
cookie.Name = name
cookie.Value = url.QueryEscape(value)
if len(others) > 0 {
switch v := others[0].(type) {
case int:
cookie.MaxAge = v
case int64:
cookie.MaxAge = int(v)
case int32:
cookie.MaxAge = int(v)
}
}
cookie.Path = "/"
if len(others) > 1 {
if v, ok := others[1].(string); ok && len(v) > 0 {
cookie.Path = v
}
}
if len(others) > 2 {
if v, ok := others[2].(string); ok && len(v) > 0 {
cookie.Domain = v
}
}
if len(others) > 3 {
switch v := others[3].(type) {
case bool:
cookie.Secure = v
default:
if others[3] != nil {
cookie.Secure = true
}
}
}
if len(others) > 4 {
if v, ok := others[4].(bool); ok && v {
cookie.HttpOnly = true
}
}
if len(others) > 5 {
if v, ok := others[5].(time.Time); ok {
cookie.Expires = v
cookie.RawExpires = v.Format(time.UnixDate)
}
}
ctx.Resp.Header().Add("Set-Cookie", cookie.String())
}
// GetCookie returns given cookie value from request header.
func (ctx *Context) GetCookie(name string) string {
cookie, err := ctx.Req.Cookie(name)
if err != nil {
return ""
}
val, _ := url.QueryUnescape(cookie.Value)
return val
}
// GetCookieInt returns cookie result in int type.
func (ctx *Context) GetCookieInt(name string) int {
return com.StrTo(ctx.GetCookie(name)).MustInt()
}
// GetCookieInt64 returns cookie result in int64 type.
func (ctx *Context) GetCookieInt64(name string) int64 {
return com.StrTo(ctx.GetCookie(name)).MustInt64()
}
// GetCookieFloat64 returns cookie result in float64 type.
func (ctx *Context) GetCookieFloat64(name string) float64 {
v, _ := strconv.ParseFloat(ctx.GetCookie(name), 64)
return v
}
var defaultCookieSecret string
// SetDefaultCookieSecret sets global default secure cookie secret.
func (m *Macaron) SetDefaultCookieSecret(secret string) {
defaultCookieSecret = secret
}
// SetSecureCookie sets given cookie value to response header with default secret string.
func (ctx *Context) SetSecureCookie(name, value string, others ...interface{}) {
ctx.SetSuperSecureCookie(defaultCookieSecret, name, value, others...)
}
// GetSecureCookie returns given cookie value from request header with default secret string.
func (ctx *Context) GetSecureCookie(key string) (string, bool) {
return ctx.GetSuperSecureCookie(defaultCookieSecret, key)
}
// SetSuperSecureCookie sets given cookie value to response header with secret string.
func (ctx *Context) SetSuperSecureCookie(secret, name, value string, others ...interface{}) {
m := md5.Sum([]byte(secret))
secret = hex.EncodeToString(m[:])
text, err := com.AESEncrypt([]byte(secret), []byte(value))
if err != nil {
panic("error encrypting cookie: " + err.Error())
}
ctx.SetCookie(name, hex.EncodeToString(text), others...)
}
// GetSuperSecureCookie returns given cookie value from request header with secret string.
func (ctx *Context) GetSuperSecureCookie(secret, key string) (string, bool) {
val := ctx.GetCookie(key)
if val == "" {
return "", false
}
data, err := hex.DecodeString(val)
if err != nil {
return "", false
}
m := md5.Sum([]byte(secret))
secret = hex.EncodeToString(m[:])
text, err := com.AESDecrypt([]byte(secret), data)
return string(text), err == nil
}
func (ctx *Context) setRawContentHeader() {
ctx.Resp.Header().Set("Content-Description", "Raw content")
ctx.Resp.Header().Set("Content-Type", "text/plain")
ctx.Resp.Header().Set("Expires", "0")
ctx.Resp.Header().Set("Cache-Control", "must-revalidate")
ctx.Resp.Header().Set("Pragma", "public")
}
// ServeContent serves given content to response.
func (ctx *Context) ServeContent(name string, r io.ReadSeeker, params ...interface{}) {
modtime := time.Now()
for _, p := range params {
switch v := p.(type) {
case time.Time:
modtime = v
}
}
ctx.setRawContentHeader()
http.ServeContent(ctx.Resp, ctx.Req.Request, name, modtime, r)
}
// ServeFileContent serves given file as content to response.
func (ctx *Context) ServeFileContent(file string, names ...string) {
var name string
if len(names) > 0 {
name = names[0]
} else {
name = path.Base(file)
}
f, err := os.Open(file)
if err != nil {
if Env == PROD {
http.Error(ctx.Resp, "Internal Server Error", 500)
} else {
http.Error(ctx.Resp, err.Error(), 500)
}
return
}
defer f.Close()
ctx.setRawContentHeader()
http.ServeContent(ctx.Resp, ctx.Req.Request, name, time.Now(), f)
}
// ServeFile serves given file to response.
func (ctx *Context) ServeFile(file string, names ...string) {
var name string
if len(names) > 0 {
name = names[0]
} else {
name = path.Base(file)
}
ctx.Resp.Header().Set("Content-Description", "File Transfer")
ctx.Resp.Header().Set("Content-Type", "application/octet-stream")
ctx.Resp.Header().Set("Content-Disposition", "attachment; filename="+name)
ctx.Resp.Header().Set("Content-Transfer-Encoding", "binary")
ctx.Resp.Header().Set("Expires", "0")
ctx.Resp.Header().Set("Cache-Control", "must-revalidate")
ctx.Resp.Header().Set("Pragma", "public")
http.ServeFile(ctx.Resp, ctx.Req.Request, file)
}
// ChangeStaticPath changes static path from old to new one.
func (ctx *Context) ChangeStaticPath(oldPath, newPath string) {
if !filepath.IsAbs(oldPath) {
oldPath = filepath.Join(Root, oldPath)
}
dir := statics.Get(oldPath)
if dir != nil {
statics.Delete(oldPath)
if !filepath.IsAbs(newPath) {
newPath = filepath.Join(Root, newPath)
}
*dir = http.Dir(newPath)
statics.Set(dir)
}
}