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 2019 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 repo
import (
"bytes"
"compress/gzip"
gocontext "context"
"fmt"
"io/ioutil"
"net/http"
"os"
"os/exec"
"path"
"regexp"
"strconv"
"strings"
"sync"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth/sso"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
repo_service "code.gitea.io/gitea/services/repository"
)
// HTTP implmentation git smart HTTP protocol
func HTTP(ctx *context.Context) {
if len(setting.Repository.AccessControlAllowOrigin) > 0 {
allowedOrigin := setting.Repository.AccessControlAllowOrigin
// Set CORS headers for browser-based git clients
ctx.Resp.Header().Set("Access-Control-Allow-Origin", allowedOrigin)
ctx.Resp.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, User-Agent")
// Handle preflight OPTIONS request
if ctx.Req.Method == "OPTIONS" {
if allowedOrigin == "*" {
ctx.Status(http.StatusOK)
} else if allowedOrigin == "null" {
ctx.Status(http.StatusForbidden)
} else {
origin := ctx.Req.Header.Get("Origin")
if len(origin) > 0 && origin == allowedOrigin {
ctx.Status(http.StatusOK)
} else {
ctx.Status(http.StatusForbidden)
}
}
return
}
}
username := ctx.Params(":username")
reponame := strings.TrimSuffix(ctx.Params(":reponame"), ".git")
if ctx.Query("go-get") == "1" {
context.EarlyResponseForGoGetMeta(ctx)
return
}
var isPull, receivePack bool
service := ctx.Query("service")
if service == "git-receive-pack" ||
strings.HasSuffix(ctx.Req.URL.Path, "git-receive-pack") {
isPull = false
receivePack = true
} else if service == "git-upload-pack" ||
strings.HasSuffix(ctx.Req.URL.Path, "git-upload-pack") {
isPull = true
} else if service == "git-upload-archive" ||
strings.HasSuffix(ctx.Req.URL.Path, "git-upload-archive") {
isPull = true
} else {
isPull = (ctx.Req.Method == "GET")
}
var accessMode models.AccessMode
if isPull {
accessMode = models.AccessModeRead
} else {
accessMode = models.AccessModeWrite
}
isWiki := false
var unitType = models.UnitTypeCode
if strings.HasSuffix(reponame, ".wiki") {
isWiki = true
unitType = models.UnitTypeWiki
reponame = reponame[:len(reponame)-5]
}
owner, err := models.GetUserByName(username)
if err != nil {
ctx.NotFoundOrServerError("GetUserByName", models.IsErrUserNotExist, err)
return
}
repoExist := true
repo, err := models.GetRepositoryByName(owner.ID, reponame)
if err != nil {
if models.IsErrRepoNotExist(err) {
if redirectRepoID, err := models.LookupRepoRedirect(owner.ID, reponame); err == nil {
context.RedirectToRepo(ctx, redirectRepoID)
return
}
repoExist = false
} else {
ctx.ServerError("GetRepositoryByName", err)
return
}
}
// Don't allow pushing if the repo is archived
if repoExist && repo.IsArchived && !isPull {
ctx.HandleText(http.StatusForbidden, "This repo is archived. You can view files and clone it, but cannot push or open issues/pull-requests.")
return
}
// Only public pull don't need auth.
isPublicPull := repoExist && !repo.IsPrivate && isPull
var (
askAuth = !isPublicPull || setting.Service.RequireSignInView
authUser *models.User
authUsername string
authPasswd string
environ []string
)
// don't allow anonymous pulls if organization is not public
if isPublicPull {
if err := repo.GetOwner(); err != nil {
ctx.ServerError("GetOwner", err)
return
}
askAuth = askAuth || (repo.Owner.Visibility != structs.VisibleTypePublic)
}
// check access
if askAuth {
authUsername = ctx.Req.Header.Get(setting.ReverseProxyAuthUser)
if setting.Service.EnableReverseProxyAuth && len(authUsername) > 0 {
authUser, err = models.GetUserByName(authUsername)
if err != nil {
ctx.HandleText(401, "reverse proxy login error, got error while running GetUserByName")
return
}
} else {
authHead := ctx.Req.Header.Get("Authorization")
if len(authHead) == 0 {
ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
ctx.Error(http.StatusUnauthorized)
return
}
auths := strings.Fields(authHead)
// currently check basic auth
// TODO: support digit auth
// FIXME: middlewares/context.go did basic auth check already,
// maybe could use that one.
if len(auths) != 2 || auths[0] != "Basic" {
ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
return
}
authUsername, authPasswd, err = base.BasicAuthDecode(auths[1])
if err != nil {
ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
return
}
// Check if username or password is a token
isUsernameToken := len(authPasswd) == 0 || authPasswd == "x-oauth-basic"
// Assume username is token
authToken := authUsername
if !isUsernameToken {
// Assume password is token
authToken = authPasswd
}
uid := sso.CheckOAuthAccessToken(authToken)
if uid != 0 {
ctx.Data["IsApiToken"] = true
authUser, err = models.GetUserByID(uid)
if err != nil {
ctx.ServerError("GetUserByID", err)
return
}
}
// Assume password is a token.
token, err := models.GetAccessTokenBySHA(authToken)
if err == nil {
authUser, err = models.GetUserByID(token.UID)
if err != nil {
ctx.ServerError("GetUserByID", err)
return
}
token.UpdatedUnix = timeutil.TimeStampNow()
if err = models.UpdateAccessToken(token); err != nil {
ctx.ServerError("UpdateAccessToken", err)
}
} else if !models.IsErrAccessTokenNotExist(err) && !models.IsErrAccessTokenEmpty(err) {
log.Error("GetAccessTokenBySha: %v", err)
}
if authUser == nil {
// Check username and password
authUser, err = models.UserSignIn(authUsername, authPasswd)
if err != nil {
if models.IsErrUserProhibitLogin(err) {
ctx.HandleText(http.StatusForbidden, "User is not permitted to login")
return
} else if !models.IsErrUserNotExist(err) {
ctx.ServerError("UserSignIn error: %v", err)
return
}
}
if authUser == nil {
ctx.HandleText(http.StatusUnauthorized, fmt.Sprintf("invalid credentials from %s", ctx.RemoteAddr()))
return
}
_, err = models.GetTwoFactorByUID(authUser.ID)
if err == nil {
// TODO: This response should be changed to "invalid credentials" for security reasons once the expectation behind it (creating an app token to authenticate) is properly documented
ctx.HandleText(http.StatusUnauthorized, "Users with two-factor authentication enabled cannot perform HTTP/HTTPS operations via plain username and password. Please create and use a personal access token on the user settings page")
return
} else if !models.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("IsErrTwoFactorNotEnrolled", err)
return
}
}
}
if repoExist {
perm, err := models.GetUserRepoPermission(repo, authUser)
if err != nil {
ctx.ServerError("GetUserRepoPermission", err)
return
}
if !perm.CanAccess(accessMode, unitType) {
ctx.HandleText(http.StatusForbidden, "User permission denied")
return
}
if !isPull && repo.IsMirror {
ctx.HandleText(http.StatusForbidden, "mirror repository is read-only")
return
}
}
environ = []string{
models.EnvRepoUsername + "=" + username,
models.EnvRepoName + "=" + reponame,
models.EnvPusherName + "=" + authUser.Name,
models.EnvPusherID + fmt.Sprintf("=%d", authUser.ID),
models.EnvIsDeployKey + "=false",
models.EnvAppURL + "=" + setting.AppURL,
}
if !authUser.KeepEmailPrivate {
environ = append(environ, models.EnvPusherEmail+"="+authUser.Email)
}
if isWiki {
environ = append(environ, models.EnvRepoIsWiki+"=true")
} else {
environ = append(environ, models.EnvRepoIsWiki+"=false")
}
}
if !repoExist {
if !receivePack {
ctx.HandleText(http.StatusNotFound, "Repository not found")
return
}
if owner.IsOrganization() && !setting.Repository.EnablePushCreateOrg {
ctx.HandleText(http.StatusForbidden, "Push to create is not enabled for organizations.")
return
}
if !owner.IsOrganization() && !setting.Repository.EnablePushCreateUser {
ctx.HandleText(http.StatusForbidden, "Push to create is not enabled for users.")
return
}
// Return dummy payload if GET receive-pack
if ctx.Req.Method == http.MethodGet {
dummyInfoRefs(ctx)
return
}
repo, err = repo_service.PushCreateRepo(authUser, owner, reponame)
if err != nil {
log.Error("pushCreateRepo: %v", err)
ctx.Status(http.StatusNotFound)
return
}
}
if isWiki {
// Ensure the wiki is enabled before we allow access to it
if _, err := repo.GetUnit(models.UnitTypeWiki); err != nil {
if models.IsErrUnitTypeNotExist(err) {
ctx.HandleText(http.StatusForbidden, "repository wiki is disabled")
return
}
log.Error("Failed to get the wiki unit in %-v Error: %v", repo, err)
ctx.ServerError("GetUnit(UnitTypeWiki) for "+repo.FullName(), err)
return
}
}
environ = append(environ, models.EnvRepoID+fmt.Sprintf("=%d", repo.ID))
w := ctx.Resp
r := ctx.Req.Request
cfg := &serviceConfig{
UploadPack: true,
ReceivePack: true,
Env: environ,
}
r.URL.Path = strings.ToLower(r.URL.Path) // blue: In case some repo name has upper case name
for _, route := range routes {
if m := route.reg.FindStringSubmatch(r.URL.Path); m != nil {
if setting.Repository.DisableHTTPGit {
w.WriteHeader(http.StatusForbidden)
_, err := w.Write([]byte("Interacting with repositories by HTTP protocol is not allowed"))
if err != nil {
log.Error(err.Error())
}
return
}
if route.method != r.Method {
if r.Proto == "HTTP/1.1" {
w.WriteHeader(http.StatusMethodNotAllowed)
_, err := w.Write([]byte("Method Not Allowed"))
if err != nil {
log.Error(err.Error())
}
} else {
w.WriteHeader(http.StatusBadRequest)
_, err := w.Write([]byte("Bad Request"))
if err != nil {
log.Error(err.Error())
}
}
return
}
file := strings.Replace(r.URL.Path, m[1]+"/", "", 1)
dir, err := getGitRepoPath(m[1])
if err != nil {
log.Error(err.Error())
ctx.NotFound("Smart Git HTTP", err)
return
}
route.handler(serviceHandler{cfg, w, r, dir, file, cfg.Env})
return
}
}
ctx.NotFound("Smart Git HTTP", nil)
}
var (
infoRefsCache []byte
infoRefsOnce sync.Once
)
func dummyInfoRefs(ctx *context.Context) {
infoRefsOnce.Do(func() {
tmpDir, err := ioutil.TempDir(os.TempDir(), "gitea-info-refs-cache")
if err != nil {
log.Error("Failed to create temp dir for git-receive-pack cache: %v", err)
return
}
defer func() {
if err := util.RemoveAll(tmpDir); err != nil {
log.Error("RemoveAll: %v", err)
}
}()
if err := git.InitRepository(tmpDir, true); err != nil {
log.Error("Failed to init bare repo for git-receive-pack cache: %v", err)
return
}
refs, err := git.NewCommand("receive-pack", "--stateless-rpc", "--advertise-refs", ".").RunInDirBytes(tmpDir)
if err != nil {
log.Error(fmt.Sprintf("%v - %s", err, string(refs)))
}
log.Debug("populating infoRefsCache: \n%s", string(refs))
infoRefsCache = refs
})
ctx.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
ctx.Header().Set("Pragma", "no-cache")
ctx.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
ctx.Header().Set("Content-Type", "application/x-git-receive-pack-advertisement")
_, _ = ctx.Write(packetWrite("# service=git-receive-pack\n"))
_, _ = ctx.Write([]byte("0000"))
_, _ = ctx.Write(infoRefsCache)
}
type serviceConfig struct {
UploadPack bool
ReceivePack bool
Env []string
}
type serviceHandler struct {
cfg *serviceConfig
w http.ResponseWriter
r *http.Request
dir string
file string
environ []string
}
func (h *serviceHandler) setHeaderNoCache() {
h.w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
h.w.Header().Set("Pragma", "no-cache")
h.w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
}
func (h *serviceHandler) setHeaderCacheForever() {
now := time.Now().Unix()
expires := now + 31536000
h.w.Header().Set("Date", fmt.Sprintf("%d", now))
h.w.Header().Set("Expires", fmt.Sprintf("%d", expires))
h.w.Header().Set("Cache-Control", "public, max-age=31536000")
}
func (h *serviceHandler) sendFile(contentType string) {
reqFile := path.Join(h.dir, h.file)
fi, err := os.Stat(reqFile)
if os.IsNotExist(err) {
h.w.WriteHeader(http.StatusNotFound)
return
}
h.w.Header().Set("Content-Type", contentType)
h.w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
h.w.Header().Set("Last-Modified", fi.ModTime().Format(http.TimeFormat))
http.ServeFile(h.w, h.r, reqFile)
}
type route struct {
reg *regexp.Regexp
method string
handler func(serviceHandler)
}
var routes = []route{
{regexp.MustCompile(`(.*?)/git-upload-pack$`), "POST", serviceUploadPack},
{regexp.MustCompile(`(.*?)/git-receive-pack$`), "POST", serviceReceivePack},
{regexp.MustCompile(`(.*?)/info/refs$`), "GET", getInfoRefs},
{regexp.MustCompile(`(.*?)/HEAD$`), "GET", getTextFile},
{regexp.MustCompile(`(.*?)/objects/info/alternates$`), "GET", getTextFile},
{regexp.MustCompile(`(.*?)/objects/info/http-alternates$`), "GET", getTextFile},
{regexp.MustCompile(`(.*?)/objects/info/packs$`), "GET", getInfoPacks},
{regexp.MustCompile(`(.*?)/objects/info/[^/]*$`), "GET", getTextFile},
{regexp.MustCompile(`(.*?)/objects/[0-9a-f]{2}/[0-9a-f]{38}$`), "GET", getLooseObject},
{regexp.MustCompile(`(.*?)/objects/pack/pack-[0-9a-f]{40}\.pack$`), "GET", getPackFile},
{regexp.MustCompile(`(.*?)/objects/pack/pack-[0-9a-f]{40}\.idx$`), "GET", getIdxFile},
}
// one or more key=value pairs separated by colons
var safeGitProtocolHeader = regexp.MustCompile(`^[0-9a-zA-Z]+=[0-9a-zA-Z]+(:[0-9a-zA-Z]+=[0-9a-zA-Z]+)*$`)
func getGitConfig(option, dir string) string {
out, err := git.NewCommand("config", option).RunInDir(dir)
if err != nil {
log.Error("%v - %s", err, out)
}
return out[0 : len(out)-1]
}
func getConfigSetting(service, dir string) bool {
service = strings.ReplaceAll(service, "-", "")
setting := getGitConfig("http."+service, dir)
if service == "uploadpack" {
return setting != "false"
}
return setting == "true"
}
func hasAccess(service string, h serviceHandler, checkContentType bool) bool {
if checkContentType {
if h.r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", service) {
return false
}
}
if !(service == "upload-pack" || service == "receive-pack") {
return false
}
if service == "receive-pack" {
return h.cfg.ReceivePack
}
if service == "upload-pack" {
return h.cfg.UploadPack
}
return getConfigSetting(service, h.dir)
}
func serviceRPC(h serviceHandler, service string) {
defer func() {
if err := h.r.Body.Close(); err != nil {
log.Error("serviceRPC: Close: %v", err)
}
}()
if !hasAccess(service, h, true) {
h.w.WriteHeader(http.StatusUnauthorized)
return
}
h.w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-result", service))
var err error
var reqBody = h.r.Body
// Handle GZIP.
if h.r.Header.Get("Content-Encoding") == "gzip" {
reqBody, err = gzip.NewReader(reqBody)
if err != nil {
log.Error("Fail to create gzip reader: %v", err)
h.w.WriteHeader(http.StatusInternalServerError)
return
}
}
// set this for allow pre-receive and post-receive execute
h.environ = append(h.environ, "SSH_ORIGINAL_COMMAND="+service)
if protocol := h.r.Header.Get("Git-Protocol"); protocol != "" && safeGitProtocolHeader.MatchString(protocol) {
h.environ = append(h.environ, "GIT_PROTOCOL="+protocol)
}
ctx, cancel := gocontext.WithCancel(git.DefaultContext)
defer cancel()
var stderr bytes.Buffer
cmd := exec.CommandContext(ctx, git.GitExecutable, service, "--stateless-rpc", h.dir)
cmd.Dir = h.dir
cmd.Env = append(os.Environ(), h.environ...)
cmd.Stdout = h.w
cmd.Stdin = reqBody
cmd.Stderr = &stderr
pid := process.GetManager().Add(fmt.Sprintf("%s %s %s [repo_path: %s]", git.GitExecutable, service, "--stateless-rpc", h.dir), cancel)
defer process.GetManager().Remove(pid)
if err := cmd.Run(); err != nil {
log.Error("Fail to serve RPC(%s): %v - %s", service, err, stderr.String())
return
}
}
func serviceUploadPack(h serviceHandler) {
serviceRPC(h, "upload-pack")
}
func serviceReceivePack(h serviceHandler) {
serviceRPC(h, "receive-pack")
}
func getServiceType(r *http.Request) string {
serviceType := r.FormValue("service")
if !strings.HasPrefix(serviceType, "git-") {
return ""
}
return strings.Replace(serviceType, "git-", "", 1)
}
func updateServerInfo(dir string) []byte {
out, err := git.NewCommand("update-server-info").RunInDirBytes(dir)
if err != nil {
log.Error(fmt.Sprintf("%v - %s", err, string(out)))
}
return out
}
func packetWrite(str string) []byte {
s := strconv.FormatInt(int64(len(str)+4), 16)
if len(s)%4 != 0 {
s = strings.Repeat("0", 4-len(s)%4) + s
}
return []byte(s + str)
}
func getInfoRefs(h serviceHandler) {
h.setHeaderNoCache()
if hasAccess(getServiceType(h.r), h, false) {
service := getServiceType(h.r)
if protocol := h.r.Header.Get("Git-Protocol"); protocol != "" && safeGitProtocolHeader.MatchString(protocol) {
h.environ = append(h.environ, "GIT_PROTOCOL="+protocol)
}
h.environ = append(os.Environ(), h.environ...)
refs, err := git.NewCommand(service, "--stateless-rpc", "--advertise-refs", ".").RunInDirTimeoutEnv(h.environ, -1, h.dir)
if err != nil {
log.Error(fmt.Sprintf("%v - %s", err, string(refs)))
}
h.w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", service))
h.w.WriteHeader(http.StatusOK)
_, _ = h.w.Write(packetWrite("# service=git-" + service + "\n"))
_, _ = h.w.Write([]byte("0000"))
_, _ = h.w.Write(refs)
} else {
updateServerInfo(h.dir)
h.sendFile("text/plain; charset=utf-8")
}
}
func getTextFile(h serviceHandler) {
h.setHeaderNoCache()
h.sendFile("text/plain")
}
func getInfoPacks(h serviceHandler) {
h.setHeaderCacheForever()
h.sendFile("text/plain; charset=utf-8")
}
func getLooseObject(h serviceHandler) {
h.setHeaderCacheForever()
h.sendFile("application/x-git-loose-object")
}
func getPackFile(h serviceHandler) {
h.setHeaderCacheForever()
h.sendFile("application/x-git-packed-objects")
}
func getIdxFile(h serviceHandler) {
h.setHeaderCacheForever()
h.sendFile("application/x-git-packed-objects-toc")
}
func getGitRepoPath(subdir string) (string, error) {
if !strings.HasSuffix(subdir, ".git") {
subdir += ".git"
}
fpath := path.Join(setting.RepoRootPath, subdir)
if _, err := os.Stat(fpath); os.IsNotExist(err) {
return "", err
}
return fpath, nil
}