683 lines
19 KiB
Go
683 lines
19 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Copyright 2019 The Gitea 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 repo
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import (
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"bytes"
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"compress/gzip"
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gocontext "context"
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"fmt"
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"io/ioutil"
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"net/http"
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"os"
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"os/exec"
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"path"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"time"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/auth/sso"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/structs"
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"code.gitea.io/gitea/modules/timeutil"
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"code.gitea.io/gitea/modules/util"
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repo_service "code.gitea.io/gitea/services/repository"
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)
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// httpBase implmentation git smart HTTP protocol
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func httpBase(ctx *context.Context) (h *serviceHandler) {
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if setting.Repository.DisableHTTPGit {
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ctx.Resp.WriteHeader(http.StatusForbidden)
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_, err := ctx.Resp.Write([]byte("Interacting with repositories by HTTP protocol is not allowed"))
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if err != nil {
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log.Error(err.Error())
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}
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return
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}
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if len(setting.Repository.AccessControlAllowOrigin) > 0 {
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allowedOrigin := setting.Repository.AccessControlAllowOrigin
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// Set CORS headers for browser-based git clients
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ctx.Resp.Header().Set("Access-Control-Allow-Origin", allowedOrigin)
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ctx.Resp.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, User-Agent")
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// Handle preflight OPTIONS request
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if ctx.Req.Method == "OPTIONS" {
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if allowedOrigin == "*" {
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ctx.Status(http.StatusOK)
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} else if allowedOrigin == "null" {
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ctx.Status(http.StatusForbidden)
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} else {
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origin := ctx.Req.Header.Get("Origin")
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if len(origin) > 0 && origin == allowedOrigin {
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ctx.Status(http.StatusOK)
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} else {
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ctx.Status(http.StatusForbidden)
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}
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}
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return
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}
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}
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username := ctx.Params(":username")
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reponame := strings.TrimSuffix(ctx.Params(":reponame"), ".git")
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if ctx.Query("go-get") == "1" {
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context.EarlyResponseForGoGetMeta(ctx)
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return
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}
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var isPull, receivePack bool
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service := ctx.Query("service")
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if service == "git-receive-pack" ||
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strings.HasSuffix(ctx.Req.URL.Path, "git-receive-pack") {
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isPull = false
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receivePack = true
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} else if service == "git-upload-pack" ||
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strings.HasSuffix(ctx.Req.URL.Path, "git-upload-pack") {
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isPull = true
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} else if service == "git-upload-archive" ||
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strings.HasSuffix(ctx.Req.URL.Path, "git-upload-archive") {
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isPull = true
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} else {
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isPull = ctx.Req.Method == "GET"
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}
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var accessMode models.AccessMode
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if isPull {
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accessMode = models.AccessModeRead
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} else {
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accessMode = models.AccessModeWrite
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}
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isWiki := false
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var unitType = models.UnitTypeCode
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var wikiRepoName string
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if strings.HasSuffix(reponame, ".wiki") {
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isWiki = true
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unitType = models.UnitTypeWiki
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wikiRepoName = reponame
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reponame = reponame[:len(reponame)-5]
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}
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owner, err := models.GetUserByName(username)
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if err != nil {
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if models.IsErrUserNotExist(err) {
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if redirectUserID, err := models.LookupUserRedirect(username); err == nil {
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context.RedirectToUser(ctx, username, redirectUserID)
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} else {
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ctx.NotFound("GetUserByName", err)
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}
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} else {
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ctx.ServerError("GetUserByName", err)
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}
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return
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}
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if !owner.IsOrganization() && !owner.IsActive {
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ctx.HandleText(http.StatusForbidden, "Repository cannot be accessed. You cannot push or open issues/pull-requests.")
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return
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}
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repoExist := true
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repo, err := models.GetRepositoryByName(owner.ID, reponame)
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if err != nil {
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if models.IsErrRepoNotExist(err) {
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if redirectRepoID, err := models.LookupRepoRedirect(owner.ID, reponame); err == nil {
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context.RedirectToRepo(ctx, redirectRepoID)
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return
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}
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repoExist = false
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} else {
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ctx.ServerError("GetRepositoryByName", err)
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return
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}
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}
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// Don't allow pushing if the repo is archived
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if repoExist && repo.IsArchived && !isPull {
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ctx.HandleText(http.StatusForbidden, "This repo is archived. You can view files and clone it, but cannot push or open issues/pull-requests.")
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return
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}
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// Only public pull don't need auth.
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isPublicPull := repoExist && !repo.IsPrivate && isPull
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var (
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askAuth = !isPublicPull || setting.Service.RequireSignInView
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authUser *models.User
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authUsername string
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authPasswd string
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environ []string
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)
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// don't allow anonymous pulls if organization is not public
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if isPublicPull {
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if err := repo.GetOwner(); err != nil {
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ctx.ServerError("GetOwner", err)
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return
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}
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askAuth = askAuth || (repo.Owner.Visibility != structs.VisibleTypePublic)
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}
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// check access
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if askAuth {
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authUsername = ctx.Req.Header.Get(setting.ReverseProxyAuthUser)
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if setting.Service.EnableReverseProxyAuth && len(authUsername) > 0 {
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authUser, err = models.GetUserByName(authUsername)
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if err != nil {
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ctx.HandleText(401, "reverse proxy login error, got error while running GetUserByName")
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return
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}
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} else {
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authHead := ctx.Req.Header.Get("Authorization")
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if len(authHead) == 0 {
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ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
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ctx.Error(http.StatusUnauthorized)
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return
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}
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auths := strings.Fields(authHead)
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// currently check basic auth
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// TODO: support digit auth
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// FIXME: middlewares/context.go did basic auth check already,
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// maybe could use that one.
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if len(auths) != 2 || auths[0] != "Basic" {
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ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
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return
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}
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authUsername, authPasswd, err = base.BasicAuthDecode(auths[1])
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if err != nil {
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ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
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return
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}
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// Check if username or password is a token
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isUsernameToken := len(authPasswd) == 0 || authPasswd == "x-oauth-basic"
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// Assume username is token
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authToken := authUsername
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if !isUsernameToken {
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// Assume password is token
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authToken = authPasswd
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}
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uid := sso.CheckOAuthAccessToken(authToken)
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if uid != 0 {
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ctx.Data["IsApiToken"] = true
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authUser, err = models.GetUserByID(uid)
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if err != nil {
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ctx.ServerError("GetUserByID", err)
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return
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}
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}
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// Assume password is a token.
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token, err := models.GetAccessTokenBySHA(authToken)
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if err == nil {
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authUser, err = models.GetUserByID(token.UID)
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if err != nil {
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ctx.ServerError("GetUserByID", err)
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return
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}
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token.UpdatedUnix = timeutil.TimeStampNow()
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if err = models.UpdateAccessToken(token); err != nil {
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ctx.ServerError("UpdateAccessToken", err)
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}
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} else if !models.IsErrAccessTokenNotExist(err) && !models.IsErrAccessTokenEmpty(err) {
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log.Error("GetAccessTokenBySha: %v", err)
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}
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if authUser == nil {
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// Check username and password
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authUser, err = models.UserSignIn(authUsername, authPasswd)
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if err != nil {
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if models.IsErrUserProhibitLogin(err) {
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ctx.HandleText(http.StatusForbidden, "User is not permitted to login")
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return
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} else if !models.IsErrUserNotExist(err) {
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ctx.ServerError("UserSignIn error: %v", err)
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return
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}
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}
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if authUser == nil {
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ctx.HandleText(http.StatusUnauthorized, fmt.Sprintf("invalid credentials from %s", ctx.RemoteAddr()))
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return
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}
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_, err = models.GetTwoFactorByUID(authUser.ID)
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if err == nil {
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// 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
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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")
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return
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} else if !models.IsErrTwoFactorNotEnrolled(err) {
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ctx.ServerError("IsErrTwoFactorNotEnrolled", err)
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return
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}
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}
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}
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if !authUser.IsActive || authUser.ProhibitLogin {
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ctx.HandleText(http.StatusForbidden, "Your account is disabled.")
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return
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}
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if repoExist {
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perm, err := models.GetUserRepoPermission(repo, authUser)
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if err != nil {
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ctx.ServerError("GetUserRepoPermission", err)
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return
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}
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if !perm.CanAccess(accessMode, unitType) {
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ctx.HandleText(http.StatusForbidden, "User permission denied")
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return
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}
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if !isPull && repo.IsMirror {
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ctx.HandleText(http.StatusForbidden, "mirror repository is read-only")
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return
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}
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}
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environ = []string{
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models.EnvRepoUsername + "=" + username,
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models.EnvRepoName + "=" + reponame,
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models.EnvPusherName + "=" + authUser.Name,
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models.EnvPusherID + fmt.Sprintf("=%d", authUser.ID),
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models.EnvIsDeployKey + "=false",
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models.EnvAppURL + "=" + setting.AppURL,
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}
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if !authUser.KeepEmailPrivate {
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environ = append(environ, models.EnvPusherEmail+"="+authUser.Email)
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}
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if isWiki {
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environ = append(environ, models.EnvRepoIsWiki+"=true")
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} else {
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environ = append(environ, models.EnvRepoIsWiki+"=false")
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}
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}
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if !repoExist {
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if !receivePack {
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ctx.HandleText(http.StatusNotFound, "Repository not found")
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return
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}
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if isWiki { // you cannot send wiki operation before create the repository
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ctx.HandleText(http.StatusNotFound, "Repository not found")
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return
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}
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if owner.IsOrganization() && !setting.Repository.EnablePushCreateOrg {
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ctx.HandleText(http.StatusForbidden, "Push to create is not enabled for organizations.")
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return
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}
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if !owner.IsOrganization() && !setting.Repository.EnablePushCreateUser {
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ctx.HandleText(http.StatusForbidden, "Push to create is not enabled for users.")
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return
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}
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// Return dummy payload if GET receive-pack
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if ctx.Req.Method == http.MethodGet {
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dummyInfoRefs(ctx)
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return
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}
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repo, err = repo_service.PushCreateRepo(authUser, owner, reponame)
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if err != nil {
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log.Error("pushCreateRepo: %v", err)
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ctx.Status(http.StatusNotFound)
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return
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}
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}
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if isWiki {
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// Ensure the wiki is enabled before we allow access to it
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if _, err := repo.GetUnit(models.UnitTypeWiki); err != nil {
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if models.IsErrUnitTypeNotExist(err) {
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ctx.HandleText(http.StatusForbidden, "repository wiki is disabled")
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return
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}
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log.Error("Failed to get the wiki unit in %-v Error: %v", repo, err)
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ctx.ServerError("GetUnit(UnitTypeWiki) for "+repo.FullName(), err)
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return
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}
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}
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environ = append(environ, models.EnvRepoID+fmt.Sprintf("=%d", repo.ID))
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w := ctx.Resp
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r := ctx.Req
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cfg := &serviceConfig{
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UploadPack: true,
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ReceivePack: true,
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Env: environ,
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}
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r.URL.Path = strings.ToLower(r.URL.Path) // blue: In case some repo name has upper case name
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dir := models.RepoPath(username, reponame)
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if isWiki {
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dir = models.RepoPath(username, wikiRepoName)
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}
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return &serviceHandler{cfg, w, r, dir, cfg.Env}
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}
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var (
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infoRefsCache []byte
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infoRefsOnce sync.Once
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)
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func dummyInfoRefs(ctx *context.Context) {
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infoRefsOnce.Do(func() {
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tmpDir, err := ioutil.TempDir(os.TempDir(), "gitea-info-refs-cache")
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if err != nil {
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log.Error("Failed to create temp dir for git-receive-pack cache: %v", err)
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return
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}
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defer func() {
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if err := util.RemoveAll(tmpDir); err != nil {
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log.Error("RemoveAll: %v", err)
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}
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}()
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if err := git.InitRepository(tmpDir, true); err != nil {
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log.Error("Failed to init bare repo for git-receive-pack cache: %v", err)
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return
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}
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refs, err := git.NewCommand("receive-pack", "--stateless-rpc", "--advertise-refs", ".").RunInDirBytes(tmpDir)
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if err != nil {
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log.Error(fmt.Sprintf("%v - %s", err, string(refs)))
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}
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log.Debug("populating infoRefsCache: \n%s", string(refs))
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infoRefsCache = refs
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})
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ctx.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
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ctx.Header().Set("Pragma", "no-cache")
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ctx.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
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ctx.Header().Set("Content-Type", "application/x-git-receive-pack-advertisement")
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_, _ = ctx.Write(packetWrite("# service=git-receive-pack\n"))
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_, _ = ctx.Write([]byte("0000"))
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_, _ = ctx.Write(infoRefsCache)
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}
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type serviceConfig struct {
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UploadPack bool
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ReceivePack bool
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Env []string
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}
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type serviceHandler struct {
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cfg *serviceConfig
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w http.ResponseWriter
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r *http.Request
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dir string
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environ []string
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}
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func (h *serviceHandler) setHeaderNoCache() {
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h.w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
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h.w.Header().Set("Pragma", "no-cache")
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h.w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
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}
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func (h *serviceHandler) setHeaderCacheForever() {
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now := time.Now().Unix()
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expires := now + 31536000
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h.w.Header().Set("Date", fmt.Sprintf("%d", now))
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h.w.Header().Set("Expires", fmt.Sprintf("%d", expires))
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h.w.Header().Set("Cache-Control", "public, max-age=31536000")
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}
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func (h *serviceHandler) sendFile(contentType, file string) {
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reqFile := path.Join(h.dir, file)
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fi, err := os.Stat(reqFile)
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if os.IsNotExist(err) {
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h.w.WriteHeader(http.StatusNotFound)
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return
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}
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h.w.Header().Set("Content-Type", contentType)
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h.w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
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h.w.Header().Set("Last-Modified", fi.ModTime().Format(http.TimeFormat))
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http.ServeFile(h.w, h.r, reqFile)
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}
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// one or more key=value pairs separated by colons
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var safeGitProtocolHeader = regexp.MustCompile(`^[0-9a-zA-Z]+=[0-9a-zA-Z]+(:[0-9a-zA-Z]+=[0-9a-zA-Z]+)*$`)
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func getGitConfig(option, dir string) string {
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out, err := git.NewCommand("config", option).RunInDir(dir)
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if err != nil {
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log.Error("%v - %s", err, out)
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}
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return out[0 : len(out)-1]
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}
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func getConfigSetting(service, dir string) bool {
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service = strings.ReplaceAll(service, "-", "")
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setting := getGitConfig("http."+service, dir)
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if service == "uploadpack" {
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return setting != "false"
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}
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return setting == "true"
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}
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func hasAccess(service string, h serviceHandler, checkContentType bool) bool {
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if checkContentType {
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if h.r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", service) {
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return false
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}
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}
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if !(service == "upload-pack" || service == "receive-pack") {
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return false
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}
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if service == "receive-pack" {
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return h.cfg.ReceivePack
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}
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if service == "upload-pack" {
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return h.cfg.UploadPack
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}
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return getConfigSetting(service, h.dir)
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}
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func serviceRPC(h serviceHandler, service string) {
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defer func() {
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if err := h.r.Body.Close(); err != nil {
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log.Error("serviceRPC: Close: %v", err)
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}
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}()
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if !hasAccess(service, h, true) {
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h.w.WriteHeader(http.StatusUnauthorized)
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return
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}
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|
|
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) in %s: %v - %s", service, h.dir, err, stderr.String())
|
|
return
|
|
}
|
|
}
|
|
|
|
// ServiceUploadPack implements Git Smart HTTP protocol
|
|
func ServiceUploadPack(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
serviceRPC(*h, "upload-pack")
|
|
}
|
|
}
|
|
|
|
// ServiceReceivePack implements Git Smart HTTP protocol
|
|
func ServiceReceivePack(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
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)
|
|
}
|
|
|
|
// GetInfoRefs implements Git dumb HTTP
|
|
func GetInfoRefs(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h == nil {
|
|
return
|
|
}
|
|
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", "info/refs")
|
|
}
|
|
}
|
|
|
|
// GetTextFile implements Git dumb HTTP
|
|
func GetTextFile(p string) func(*context.Context) {
|
|
return func(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
h.setHeaderNoCache()
|
|
file := ctx.Params("file")
|
|
if file != "" {
|
|
h.sendFile("text/plain", "objects/info/"+file)
|
|
} else {
|
|
h.sendFile("text/plain", p)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// GetInfoPacks implements Git dumb HTTP
|
|
func GetInfoPacks(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
h.setHeaderCacheForever()
|
|
h.sendFile("text/plain; charset=utf-8", "objects/info/packs")
|
|
}
|
|
}
|
|
|
|
// GetLooseObject implements Git dumb HTTP
|
|
func GetLooseObject(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
h.setHeaderCacheForever()
|
|
h.sendFile("application/x-git-loose-object", fmt.Sprintf("objects/%s/%s",
|
|
ctx.Params("head"), ctx.Params("hash")))
|
|
}
|
|
}
|
|
|
|
// GetPackFile implements Git dumb HTTP
|
|
func GetPackFile(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
h.setHeaderCacheForever()
|
|
h.sendFile("application/x-git-packed-objects", "objects/pack/pack-"+ctx.Params("file")+".pack")
|
|
}
|
|
}
|
|
|
|
// GetIdxFile implements Git dumb HTTP
|
|
func GetIdxFile(ctx *context.Context) {
|
|
h := httpBase(ctx)
|
|
if h != nil {
|
|
h.setHeaderCacheForever()
|
|
h.sendFile("application/x-git-packed-objects-toc", "objects/pack/pack-"+ctx.Params("file")+".idx")
|
|
}
|
|
}
|