A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package context
import (
"context"
"crypto/sha256"
"encoding/hex"
"fmt"
"html"
"html/template"
"io"
"net/http"
"net/url"
"path"
"strconv"
"strings"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth/sso"
"code.gitea.io/gitea/modules/base"
mc "code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/templates"
"code.gitea.io/gitea/modules/translation"
"code.gitea.io/gitea/modules/web/middleware"
"gitea.com/go-chi/cache"
"gitea.com/go-chi/session"
"github.com/go-chi/chi"
jsoniter "github.com/json-iterator/go"
"github.com/unknwon/com"
"github.com/unknwon/i18n"
"github.com/unrolled/render"
"golang.org/x/crypto/pbkdf2"
)
// Render represents a template render
type Render interface {
TemplateLookup(tmpl string) *template.Template
HTML(w io.Writer, status int, name string, binding interface{}, htmlOpt ...render.HTMLOptions) error
}
// Context represents context of a request.
type Context struct {
Resp ResponseWriter
Req *http.Request
Data map[string]interface{}
Render Render
translation.Locale
Cache cache.Cache
csrf CSRF
Flash *middleware.Flash
Session session.Store
Link string // current request URL
EscapedLink string
User *models.User
IsSigned bool
IsBasicAuth bool
Repo *Repository
Org *Organization
}
// GetData returns the data
func (ctx *Context) GetData() map[string]interface{} {
return ctx.Data
}
// IsUserSiteAdmin returns true if current user is a site admin
func (ctx *Context) IsUserSiteAdmin() bool {
return ctx.IsSigned && ctx.User.IsAdmin
}
// IsUserRepoOwner returns true if current user owns current repo
func (ctx *Context) IsUserRepoOwner() bool {
return ctx.Repo.IsOwner()
}
// IsUserRepoAdmin returns true if current user is admin in current repo
func (ctx *Context) IsUserRepoAdmin() bool {
return ctx.Repo.IsAdmin()
}
// IsUserRepoWriter returns true if current user has write privilege in current repo
func (ctx *Context) IsUserRepoWriter(unitTypes []models.UnitType) bool {
for _, unitType := range unitTypes {
if ctx.Repo.CanWrite(unitType) {
return true
}
}
return false
}
// IsUserRepoReaderSpecific returns true if current user can read current repo's specific part
func (ctx *Context) IsUserRepoReaderSpecific(unitType models.UnitType) bool {
return ctx.Repo.CanRead(unitType)
}
// IsUserRepoReaderAny returns true if current user can read any part of current repo
func (ctx *Context) IsUserRepoReaderAny() bool {
return ctx.Repo.HasAccess()
}
// RedirectToUser redirect to a differently-named user
func RedirectToUser(ctx *Context, userName string, redirectUserID int64) {
user, err := models.GetUserByID(redirectUserID)
if err != nil {
ctx.ServerError("GetUserByID", err)
return
}
redirectPath := strings.Replace(
ctx.Req.URL.Path,
userName,
user.Name,
1,
)
if ctx.Req.URL.RawQuery != "" {
redirectPath += "?" + ctx.Req.URL.RawQuery
}
ctx.Redirect(path.Join(setting.AppSubURL, redirectPath))
}
// HasAPIError returns true if error occurs in form validation.
func (ctx *Context) HasAPIError() bool {
hasErr, ok := ctx.Data["HasError"]
if !ok {
return false
}
return hasErr.(bool)
}
// GetErrMsg returns error message
func (ctx *Context) GetErrMsg() string {
return ctx.Data["ErrorMsg"].(string)
}
// HasError returns true if error occurs in form validation.
func (ctx *Context) HasError() bool {
hasErr, ok := ctx.Data["HasError"]
if !ok {
return false
}
ctx.Flash.ErrorMsg = ctx.Data["ErrorMsg"].(string)
ctx.Data["Flash"] = ctx.Flash
return hasErr.(bool)
}
// HasValue returns true if value of given name exists.
func (ctx *Context) HasValue(name string) bool {
_, ok := ctx.Data[name]
return ok
}
// RedirectToFirst redirects to first not empty URL
func (ctx *Context) RedirectToFirst(location ...string) {
for _, loc := range location {
if len(loc) == 0 {
continue
}
u, err := url.Parse(loc)
if err != nil || ((u.Scheme != "" || u.Host != "") && !strings.HasPrefix(strings.ToLower(loc), strings.ToLower(setting.AppURL))) {
continue
}
ctx.Redirect(loc)
return
}
ctx.Redirect(setting.AppSubURL + "/")
}
// HTML calls Context.HTML and converts template name to string.
func (ctx *Context) HTML(status int, name base.TplName) {
log.Debug("Template: %s", name)
var startTime = time.Now()
ctx.Data["TmplLoadTimes"] = func() string {
return fmt.Sprint(time.Since(startTime).Nanoseconds()/1e6) + "ms"
}
if err := ctx.Render.HTML(ctx.Resp, status, string(name), ctx.Data); err != nil {
if status == http.StatusInternalServerError && name == base.TplName("status/500") {
ctx.PlainText(http.StatusInternalServerError, []byte("Unable to find status/500 template"))
return
}
ctx.ServerError("Render failed", err)
}
}
// HTMLString render content to a string but not http.ResponseWriter
func (ctx *Context) HTMLString(name string, data interface{}) (string, error) {
var buf strings.Builder
var startTime = time.Now()
ctx.Data["TmplLoadTimes"] = func() string {
return fmt.Sprint(time.Since(startTime).Nanoseconds()/1e6) + "ms"
}
err := ctx.Render.HTML(&buf, 200, string(name), data)
return buf.String(), err
}
// RenderWithErr used for page has form validation but need to prompt error to users.
func (ctx *Context) RenderWithErr(msg string, tpl base.TplName, form interface{}) {
if form != nil {
middleware.AssignForm(form, ctx.Data)
}
ctx.Flash.ErrorMsg = msg
ctx.Data["Flash"] = ctx.Flash
ctx.HTML(200, tpl)
}
// NotFound displays a 404 (Not Found) page and prints the given error, if any.
func (ctx *Context) NotFound(title string, err error) {
ctx.notFoundInternal(title, err)
}
func (ctx *Context) notFoundInternal(title string, err error) {
if err != nil {
log.ErrorWithSkip(2, "%s: %v", title, err)
if !setting.IsProd() {
ctx.Data["ErrorMsg"] = err
}
}
ctx.Data["IsRepo"] = ctx.Repo.Repository != nil
ctx.Data["Title"] = "Page Not Found"
ctx.HTML(http.StatusNotFound, base.TplName("status/404"))
}
// ServerError displays a 500 (Internal Server Error) page and prints the given
// error, if any.
func (ctx *Context) ServerError(title string, err error) {
ctx.serverErrorInternal(title, err)
}
func (ctx *Context) serverErrorInternal(title string, err error) {
if err != nil {
log.ErrorWithSkip(2, "%s: %v", title, err)
if !setting.IsProd() {
ctx.Data["ErrorMsg"] = err
}
}
ctx.Data["Title"] = "Internal Server Error"
ctx.HTML(http.StatusInternalServerError, base.TplName("status/500"))
}
// NotFoundOrServerError use error check function to determine if the error
// is about not found. It responses with 404 status code for not found error,
// or error context description for logging purpose of 500 server error.
func (ctx *Context) NotFoundOrServerError(title string, errck func(error) bool, err error) {
if errck(err) {
ctx.notFoundInternal(title, err)
return
}
ctx.serverErrorInternal(title, err)
}
// Header returns a header
func (ctx *Context) Header() http.Header {
return ctx.Resp.Header()
}
// FIXME: We should differ Query and Form, currently we just use form as query
// Currently to be compatible with macaron, we keep it.
// Query returns request form as string with default
func (ctx *Context) Query(key string, defaults ...string) string {
return (*Forms)(ctx.Req).MustString(key, defaults...)
}
// QueryTrim returns request form as string with default and trimmed spaces
func (ctx *Context) QueryTrim(key string, defaults ...string) string {
return (*Forms)(ctx.Req).MustTrimmed(key, defaults...)
}
// QueryStrings returns request form as strings with default
func (ctx *Context) QueryStrings(key string, defaults ...[]string) []string {
return (*Forms)(ctx.Req).MustStrings(key, defaults...)
}
// QueryInt returns request form as int with default
func (ctx *Context) QueryInt(key string, defaults ...int) int {
return (*Forms)(ctx.Req).MustInt(key, defaults...)
}
// QueryInt64 returns request form as int64 with default
func (ctx *Context) QueryInt64(key string, defaults ...int64) int64 {
return (*Forms)(ctx.Req).MustInt64(key, defaults...)
}
// QueryBool returns request form as bool with default
func (ctx *Context) QueryBool(key string, defaults ...bool) bool {
return (*Forms)(ctx.Req).MustBool(key, defaults...)
}
// HandleText handles HTTP status code
func (ctx *Context) HandleText(status int, title string) {
if (status/100 == 4) || (status/100 == 5) {
log.Error("%s", title)
}
ctx.PlainText(status, []byte(title))
}
// ServeContent serves content to http request
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.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")
ctx.Resp.Header().Set("Access-Control-Expose-Headers", "Content-Disposition")
http.ServeContent(ctx.Resp, ctx.Req, name, modtime, r)
}
// PlainText render content as plain text
func (ctx *Context) PlainText(status int, bs []byte) {
ctx.Resp.WriteHeader(status)
ctx.Resp.Header().Set("Content-Type", "text/plain;charset=utf-8")
if _, err := ctx.Resp.Write(bs); err != nil {
ctx.ServerError("Render JSON failed", err)
}
}
// 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, file)
}
// Error returned an error to web browser
func (ctx *Context) Error(status int, contents ...string) {
var v = http.StatusText(status)
if len(contents) > 0 {
v = contents[0]
}
http.Error(ctx.Resp, v, status)
}
// JSON render content as JSON
func (ctx *Context) JSON(status int, content interface{}) {
ctx.Resp.Header().Set("Content-Type", "application/json;charset=utf-8")
ctx.Resp.WriteHeader(status)
json := jsoniter.ConfigCompatibleWithStandardLibrary
if err := json.NewEncoder(ctx.Resp).Encode(content); err != nil {
ctx.ServerError("Render JSON failed", err)
}
}
// Redirect redirect the request
func (ctx *Context) Redirect(location string, status ...int) {
code := http.StatusFound
if len(status) == 1 {
code = status[0]
}
http.Redirect(ctx.Resp, ctx.Req, location, code)
}
// SetCookie convenience function to set most cookies consistently
// CSRF and a few others are the exception here
func (ctx *Context) SetCookie(name, value string, expiry int) {
middleware.SetCookie(ctx.Resp, name, value,
expiry,
setting.AppSubURL,
setting.SessionConfig.Domain,
setting.SessionConfig.Secure,
true,
middleware.SameSite(setting.SessionConfig.SameSite))
}
// DeleteCookie convenience function to delete most cookies consistently
// CSRF and a few others are the exception here
func (ctx *Context) DeleteCookie(name string) {
middleware.SetCookie(ctx.Resp, name, "",
-1,
setting.AppSubURL,
setting.SessionConfig.Domain,
setting.SessionConfig.Secure,
true,
middleware.SameSite(setting.SessionConfig.SameSite))
}
// GetCookie returns given cookie value from request header.
func (ctx *Context) GetCookie(name string) string {
return middleware.GetCookie(ctx.Req, name)
}
// GetSuperSecureCookie returns given cookie value from request header with secret string.
func (ctx *Context) GetSuperSecureCookie(secret, name string) (string, bool) {
val := ctx.GetCookie(name)
return ctx.CookieDecrypt(secret, val)
}
// CookieDecrypt returns given value from with secret string.
func (ctx *Context) CookieDecrypt(secret, val string) (string, bool) {
if val == "" {
return "", false
}
text, err := hex.DecodeString(val)
if err != nil {
return "", false
}
key := pbkdf2.Key([]byte(secret), []byte(secret), 1000, 16, sha256.New)
text, err = com.AESGCMDecrypt(key, text)
return string(text), err == nil
}
// SetSuperSecureCookie sets given cookie value to response header with secret string.
func (ctx *Context) SetSuperSecureCookie(secret, name, value string, expiry int) {
text := ctx.CookieEncrypt(secret, value)
ctx.SetCookie(name, text, expiry)
}
// CookieEncrypt encrypts a given value using the provided secret
func (ctx *Context) CookieEncrypt(secret, value string) string {
key := pbkdf2.Key([]byte(secret), []byte(secret), 1000, 16, sha256.New)
text, err := com.AESGCMEncrypt(key, []byte(value))
if err != nil {
panic("error encrypting cookie: " + err.Error())
}
return hex.EncodeToString(text)
}
// GetCookieInt returns cookie result in int type.
func (ctx *Context) GetCookieInt(name string) int {
r, _ := strconv.Atoi(ctx.GetCookie(name))
return r
}
// GetCookieInt64 returns cookie result in int64 type.
func (ctx *Context) GetCookieInt64(name string) int64 {
r, _ := strconv.ParseInt(ctx.GetCookie(name), 10, 64)
return r
}
// GetCookieFloat64 returns cookie result in float64 type.
func (ctx *Context) GetCookieFloat64(name string) float64 {
v, _ := strconv.ParseFloat(ctx.GetCookie(name), 64)
return v
}
// RemoteAddr returns the client machie ip address
func (ctx *Context) RemoteAddr() string {
return ctx.Req.RemoteAddr
}
// Params returns the param on route
func (ctx *Context) Params(p string) string {
s, _ := url.PathUnescape(chi.URLParam(ctx.Req, strings.TrimPrefix(p, ":")))
return s
}
// ParamsInt64 returns the param on route as int64
func (ctx *Context) ParamsInt64(p string) int64 {
v, _ := strconv.ParseInt(ctx.Params(p), 10, 64)
return v
}
// SetParams set params into routes
func (ctx *Context) SetParams(k, v string) {
chiCtx := chi.RouteContext(ctx.Req.Context())
chiCtx.URLParams.Add(strings.TrimPrefix(k, ":"), url.PathEscape(v))
}
// Write writes data to webbrowser
func (ctx *Context) Write(bs []byte) (int, error) {
return ctx.Resp.Write(bs)
}
// Written returns true if there are something sent to web browser
func (ctx *Context) Written() bool {
return ctx.Resp.Status() > 0
}
// Status writes status code
func (ctx *Context) Status(status int) {
ctx.Resp.WriteHeader(status)
}
// Handler represents a custom handler
type Handler func(*Context)
// enumerate all content
var (
contextKey interface{} = "default_context"
)
// WithContext set up install context in request
func WithContext(req *http.Request, ctx *Context) *http.Request {
return req.WithContext(context.WithValue(req.Context(), contextKey, ctx))
}
// GetContext retrieves install context from request
func GetContext(req *http.Request) *Context {
return req.Context().Value(contextKey).(*Context)
}
// SignedUserName returns signed user's name via context
func SignedUserName(req *http.Request) string {
if middleware.IsInternalPath(req) {
return ""
}
if middleware.IsAPIPath(req) {
ctx, ok := req.Context().Value(apiContextKey).(*APIContext)
if ok {
v := ctx.Data["SignedUserName"]
if res, ok := v.(string); ok {
return res
}
}
} else {
ctx, ok := req.Context().Value(contextKey).(*Context)
if ok {
v := ctx.Data["SignedUserName"]
if res, ok := v.(string); ok {
return res
}
}
}
return ""
}
func getCsrfOpts() CsrfOptions {
return CsrfOptions{
Secret: setting.SecretKey,
Cookie: setting.CSRFCookieName,
SetCookie: true,
Secure: setting.SessionConfig.Secure,
CookieHTTPOnly: setting.CSRFCookieHTTPOnly,
Header: "X-Csrf-Token",
CookieDomain: setting.SessionConfig.Domain,
CookiePath: setting.SessionConfig.CookiePath,
SameSite: setting.SessionConfig.SameSite,
}
}
// Contexter initializes a classic context for a request.
func Contexter() func(next http.Handler) http.Handler {
var rnd = templates.HTMLRenderer()
var csrfOpts = getCsrfOpts()
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
var locale = middleware.Locale(resp, req)
var startTime = time.Now()
var link = setting.AppSubURL + strings.TrimSuffix(req.URL.EscapedPath(), "/")
var ctx = Context{
Resp: NewResponse(resp),
Cache: mc.GetCache(),
Locale: locale,
Link: link,
Render: rnd,
Session: session.GetSession(req),
Repo: &Repository{
PullRequest: &PullRequest{},
},
Org: &Organization{},
Data: map[string]interface{}{
"CurrentURL": setting.AppSubURL + req.URL.RequestURI(),
"PageStartTime": startTime,
"Link": link,
},
}
ctx.Req = WithContext(req, &ctx)
ctx.csrf = Csrfer(csrfOpts, &ctx)
// Get flash.
flashCookie := ctx.GetCookie("macaron_flash")
vals, _ := url.ParseQuery(flashCookie)
if len(vals) > 0 {
f := &middleware.Flash{
DataStore: &ctx,
Values: vals,
ErrorMsg: vals.Get("error"),
SuccessMsg: vals.Get("success"),
InfoMsg: vals.Get("info"),
WarningMsg: vals.Get("warning"),
}
ctx.Data["Flash"] = f
}
f := &middleware.Flash{
DataStore: &ctx,
Values: url.Values{},
ErrorMsg: "",
WarningMsg: "",
InfoMsg: "",
SuccessMsg: "",
}
ctx.Resp.Before(func(resp ResponseWriter) {
if flash := f.Encode(); len(flash) > 0 {
middleware.SetCookie(resp, "macaron_flash", flash, 0,
setting.SessionConfig.CookiePath,
middleware.Domain(setting.SessionConfig.Domain),
middleware.HTTPOnly(true),
middleware.Secure(setting.SessionConfig.Secure),
middleware.SameSite(setting.SessionConfig.SameSite),
)
return
}
middleware.SetCookie(ctx.Resp, "macaron_flash", "", -1,
setting.SessionConfig.CookiePath,
middleware.Domain(setting.SessionConfig.Domain),
middleware.HTTPOnly(true),
middleware.Secure(setting.SessionConfig.Secure),
middleware.SameSite(setting.SessionConfig.SameSite),
)
})
ctx.Flash = f
// If request sends files, parse them here otherwise the Query() can't be parsed and the CsrfToken will be invalid.
if ctx.Req.Method == "POST" && strings.Contains(ctx.Req.Header.Get("Content-Type"), "multipart/form-data") {
if err := ctx.Req.ParseMultipartForm(setting.Attachment.MaxSize << 20); err != nil && !strings.Contains(err.Error(), "EOF") { // 32MB max size
ctx.ServerError("ParseMultipartForm", err)
return
}
}
// Get user from session if logged in.
ctx.User, ctx.IsBasicAuth = sso.SignedInUser(ctx.Req, ctx.Resp, &ctx, ctx.Session)
if ctx.User != nil {
ctx.IsSigned = true
ctx.Data["IsSigned"] = ctx.IsSigned
ctx.Data["SignedUser"] = ctx.User
ctx.Data["SignedUserID"] = ctx.User.ID
ctx.Data["SignedUserName"] = ctx.User.Name
ctx.Data["IsAdmin"] = ctx.User.IsAdmin
} else {
ctx.Data["SignedUserID"] = int64(0)
ctx.Data["SignedUserName"] = ""
}
ctx.Resp.Header().Set(`X-Frame-Options`, `SAMEORIGIN`)
ctx.Data["CsrfToken"] = html.EscapeString(ctx.csrf.GetToken())
ctx.Data["CsrfTokenHtml"] = template.HTML(`<input type="hidden" name="_csrf" value="` + ctx.Data["CsrfToken"].(string) + `">`)
log.Debug("Session ID: %s", ctx.Session.ID())
log.Debug("CSRF Token: %v", ctx.Data["CsrfToken"])
ctx.Data["IsLandingPageHome"] = setting.LandingPageURL == setting.LandingPageHome
ctx.Data["IsLandingPageExplore"] = setting.LandingPageURL == setting.LandingPageExplore
ctx.Data["IsLandingPageOrganizations"] = setting.LandingPageURL == setting.LandingPageOrganizations
ctx.Data["ShowRegistrationButton"] = setting.Service.ShowRegistrationButton
ctx.Data["ShowMilestonesDashboardPage"] = setting.Service.ShowMilestonesDashboardPage
ctx.Data["ShowFooterBranding"] = setting.ShowFooterBranding
ctx.Data["ShowFooterVersion"] = setting.ShowFooterVersion
ctx.Data["EnableSwagger"] = setting.API.EnableSwagger
ctx.Data["EnableOpenIDSignIn"] = setting.Service.EnableOpenIDSignIn
ctx.Data["DisableMigrations"] = setting.Repository.DisableMigrations
ctx.Data["ManifestData"] = setting.ManifestData
ctx.Data["i18n"] = locale
ctx.Data["Tr"] = i18n.Tr
ctx.Data["Lang"] = locale.Language()
ctx.Data["AllLangs"] = translation.AllLangs()
for _, lang := range translation.AllLangs() {
if lang.Lang == locale.Language() {
ctx.Data["LangName"] = lang.Name
break
}
}
next.ServeHTTP(ctx.Resp, ctx.Req)
})
}
}