387 lines
9.1 KiB
Go
387 lines
9.1 KiB
Go
// Copyright 2014 The Gogs Authors. 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 middleware
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import (
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"crypto/hmac"
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"crypto/sha1"
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"encoding/base64"
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"fmt"
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"html/template"
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"io"
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"net/http"
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"net/url"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"github.com/go-martini/martini"
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"github.com/gogits/cache"
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"github.com/gogits/git"
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"github.com/gogits/session"
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"github.com/gogits/gogs/models"
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"github.com/gogits/gogs/modules/auth"
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"github.com/gogits/gogs/modules/base"
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"github.com/gogits/gogs/modules/log"
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"github.com/gogits/gogs/modules/setting"
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)
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// Context represents context of a request.
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type Context struct {
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*Render
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c martini.Context
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p martini.Params
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Req *http.Request
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Res http.ResponseWriter
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Flash *Flash
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Session session.SessionStore
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Cache cache.Cache
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User *models.User
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IsSigned bool
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csrfToken string
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Repo struct {
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IsOwner bool
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IsTrueOwner bool
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IsWatching bool
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IsBranch bool
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IsTag bool
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IsCommit bool
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HasAccess bool
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Repository *models.Repository
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Owner *models.User
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Commit *git.Commit
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Tag *git.Tag
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GitRepo *git.Repository
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BranchName string
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TagName string
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CommitId string
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RepoLink string
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CloneLink struct {
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SSH string
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HTTPS string
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Git string
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}
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Mirror *models.Mirror
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}
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}
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// Query querys form parameter.
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func (ctx *Context) Query(name string) string {
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ctx.Req.ParseForm()
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return ctx.Req.Form.Get(name)
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}
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// func (ctx *Context) Param(name string) string {
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// return ctx.p[name]
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// }
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// HasError returns true if error occurs in form validation.
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func (ctx *Context) HasApiError() bool {
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hasErr, ok := ctx.Data["HasError"]
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if !ok {
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return false
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}
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return hasErr.(bool)
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}
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func (ctx *Context) GetErrMsg() string {
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return ctx.Data["ErrorMsg"].(string)
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}
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// HasError returns true if error occurs in form validation.
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func (ctx *Context) HasError() bool {
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hasErr, ok := ctx.Data["HasError"]
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if !ok {
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return false
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}
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ctx.Flash.ErrorMsg = ctx.Data["ErrorMsg"].(string)
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ctx.Data["Flash"] = ctx.Flash
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return hasErr.(bool)
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}
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// HTML calls render.HTML underlying but reduce one argument.
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func (ctx *Context) HTML(status int, name base.TplName, htmlOpt ...HTMLOptions) {
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ctx.Render.HTML(status, string(name), ctx.Data, htmlOpt...)
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}
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// RenderWithErr used for page has form validation but need to prompt error to users.
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func (ctx *Context) RenderWithErr(msg string, tpl base.TplName, form auth.Form) {
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if form != nil {
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auth.AssignForm(form, ctx.Data)
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}
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ctx.Flash.ErrorMsg = msg
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ctx.Data["Flash"] = ctx.Flash
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ctx.HTML(200, tpl)
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}
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// Handle handles and logs error by given status.
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func (ctx *Context) Handle(status int, title string, err error) {
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if err != nil {
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log.Error("%s: %v", title, err)
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if martini.Dev != martini.Prod {
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ctx.Data["ErrorMsg"] = err
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}
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}
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switch status {
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case 404:
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ctx.Data["Title"] = "Page Not Found"
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case 500:
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ctx.Data["Title"] = "Internal Server Error"
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}
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ctx.HTML(status, base.TplName(fmt.Sprintf("status/%d", status)))
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}
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func (ctx *Context) GetCookie(name string) string {
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cookie, err := ctx.Req.Cookie(name)
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if err != nil {
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return ""
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}
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return cookie.Value
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}
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func (ctx *Context) SetCookie(name string, value string, others ...interface{}) {
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cookie := http.Cookie{}
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cookie.Name = name
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cookie.Value = value
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if len(others) > 0 {
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switch v := others[0].(type) {
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case int:
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cookie.MaxAge = v
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case int64:
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cookie.MaxAge = int(v)
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case int32:
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cookie.MaxAge = int(v)
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}
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}
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// default "/"
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if len(others) > 1 {
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if v, ok := others[1].(string); ok && len(v) > 0 {
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cookie.Path = v
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}
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} else {
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cookie.Path = "/"
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}
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// default empty
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if len(others) > 2 {
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if v, ok := others[2].(string); ok && len(v) > 0 {
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cookie.Domain = v
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}
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}
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// default empty
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if len(others) > 3 {
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switch v := others[3].(type) {
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case bool:
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cookie.Secure = v
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default:
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if others[3] != nil {
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cookie.Secure = true
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}
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}
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}
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// default false. for session cookie default true
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if len(others) > 4 {
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if v, ok := others[4].(bool); ok && v {
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cookie.HttpOnly = true
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}
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}
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ctx.Res.Header().Add("Set-Cookie", cookie.String())
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}
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// Get secure cookie from request by a given key.
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func (ctx *Context) GetSecureCookie(Secret, key string) (string, bool) {
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val := ctx.GetCookie(key)
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if val == "" {
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return "", false
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}
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parts := strings.SplitN(val, "|", 3)
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if len(parts) != 3 {
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return "", false
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}
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vs := parts[0]
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timestamp := parts[1]
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sig := parts[2]
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h := hmac.New(sha1.New, []byte(Secret))
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fmt.Fprintf(h, "%s%s", vs, timestamp)
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if fmt.Sprintf("%02x", h.Sum(nil)) != sig {
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return "", false
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}
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res, _ := base64.URLEncoding.DecodeString(vs)
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return string(res), true
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}
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// Set Secure cookie for response.
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func (ctx *Context) SetSecureCookie(Secret, name, value string, others ...interface{}) {
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vs := base64.URLEncoding.EncodeToString([]byte(value))
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timestamp := strconv.FormatInt(time.Now().UnixNano(), 10)
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h := hmac.New(sha1.New, []byte(Secret))
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fmt.Fprintf(h, "%s%s", vs, timestamp)
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sig := fmt.Sprintf("%02x", h.Sum(nil))
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cookie := strings.Join([]string{vs, timestamp, sig}, "|")
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ctx.SetCookie(name, cookie, others...)
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}
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func (ctx *Context) CsrfToken() string {
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if len(ctx.csrfToken) > 0 {
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return ctx.csrfToken
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}
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token := ctx.GetCookie("_csrf")
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if len(token) == 0 {
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token = base.GetRandomString(30)
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ctx.SetCookie("_csrf", token)
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}
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ctx.csrfToken = token
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return token
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}
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func (ctx *Context) CsrfTokenValid() bool {
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token := ctx.Query("_csrf")
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if token == "" {
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token = ctx.Req.Header.Get("X-Csrf-Token")
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}
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if token == "" {
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return false
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} else if ctx.csrfToken != token {
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return false
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}
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return true
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}
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func (ctx *Context) ServeFile(file string, names ...string) {
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var name string
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if len(names) > 0 {
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name = names[0]
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} else {
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name = filepath.Base(file)
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}
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ctx.Res.Header().Set("Content-Description", "File Transfer")
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ctx.Res.Header().Set("Content-Type", "application/octet-stream")
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ctx.Res.Header().Set("Content-Disposition", "attachment; filename="+name)
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ctx.Res.Header().Set("Content-Transfer-Encoding", "binary")
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ctx.Res.Header().Set("Expires", "0")
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ctx.Res.Header().Set("Cache-Control", "must-revalidate")
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ctx.Res.Header().Set("Pragma", "public")
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http.ServeFile(ctx.Res, ctx.Req, file)
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}
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func (ctx *Context) ServeContent(name string, r io.ReadSeeker, params ...interface{}) {
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modtime := time.Now()
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for _, p := range params {
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switch v := p.(type) {
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case time.Time:
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modtime = v
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}
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}
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ctx.Res.Header().Set("Content-Description", "File Transfer")
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ctx.Res.Header().Set("Content-Type", "application/octet-stream")
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ctx.Res.Header().Set("Content-Disposition", "attachment; filename="+name)
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ctx.Res.Header().Set("Content-Transfer-Encoding", "binary")
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ctx.Res.Header().Set("Expires", "0")
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ctx.Res.Header().Set("Cache-Control", "must-revalidate")
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ctx.Res.Header().Set("Pragma", "public")
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http.ServeContent(ctx.Res, ctx.Req, name, modtime, r)
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}
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type Flash struct {
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url.Values
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ErrorMsg, SuccessMsg string
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}
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func (f *Flash) Error(msg string) {
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f.Set("error", msg)
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f.ErrorMsg = msg
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}
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func (f *Flash) Success(msg string) {
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f.Set("success", msg)
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f.SuccessMsg = msg
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}
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// InitContext initializes a classic context for a request.
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func InitContext() martini.Handler {
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return func(res http.ResponseWriter, r *http.Request, c martini.Context, rd *Render) {
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ctx := &Context{
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c: c,
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// p: p,
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Req: r,
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Res: res,
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Cache: setting.Cache,
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Render: rd,
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}
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ctx.Data["PageStartTime"] = time.Now()
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// start session
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ctx.Session = setting.SessionManager.SessionStart(res, r)
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// Get flash.
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values, err := url.ParseQuery(ctx.GetCookie("gogs_flash"))
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if err != nil {
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log.Error("InitContext.ParseQuery(flash): %v", err)
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} else if len(values) > 0 {
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ctx.Flash = &Flash{Values: values}
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ctx.Flash.ErrorMsg = ctx.Flash.Get("error")
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ctx.Flash.SuccessMsg = ctx.Flash.Get("success")
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ctx.Data["Flash"] = ctx.Flash
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ctx.SetCookie("gogs_flash", "", -1)
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}
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ctx.Flash = &Flash{Values: url.Values{}}
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rw := res.(martini.ResponseWriter)
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rw.Before(func(martini.ResponseWriter) {
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ctx.Session.SessionRelease(res)
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if flash := ctx.Flash.Encode(); len(flash) > 0 {
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ctx.SetCookie("gogs_flash", flash, 0)
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}
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})
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// Get user from session if logined.
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user := auth.SignedInUser(ctx.req.Header, ctx.Session)
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ctx.User = user
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ctx.IsSigned = user != nil
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ctx.Data["IsSigned"] = ctx.IsSigned
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if user != nil {
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ctx.Data["SignedUser"] = user
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ctx.Data["SignedUserId"] = user.Id
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ctx.Data["SignedUserName"] = user.Name
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ctx.Data["IsAdmin"] = ctx.User.IsAdmin
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}
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// If request sends files, parse them here otherwise the Query() can't be parsed and the CsrfToken will be invalid.
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if strings.Contains(r.Header.Get("Content-Type"), "multipart/form-data") {
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if err = ctx.Req.ParseMultipartForm(setting.AttachmentMaxSize << 20); err != nil { // 32MB max size
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ctx.Handle(500, "issue.Comment(ctx.Req.ParseMultipartForm)", err)
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return
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}
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}
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// get or create csrf token
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ctx.Data["CsrfToken"] = ctx.CsrfToken()
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ctx.Data["CsrfTokenHtml"] = template.HTML(`<input type="hidden" name="_csrf" value="` + ctx.csrfToken + `">`)
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c.Map(ctx)
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c.Next()
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}
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}
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