mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-23 08:47:42 -05:00
531 lines
12 KiB
Go
531 lines
12 KiB
Go
// Copyright 2014 The Gogs 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"
|
|
"encoding/base64"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"os"
|
|
"os/exec"
|
|
"path"
|
|
"path/filepath"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/gogits/gogs/models"
|
|
"github.com/gogits/gogs/modules/base"
|
|
"github.com/gogits/gogs/modules/log"
|
|
"github.com/gogits/gogs/modules/middleware"
|
|
"github.com/gogits/gogs/modules/setting"
|
|
)
|
|
|
|
func basicEncode(username, password string) string {
|
|
auth := username + ":" + password
|
|
return base64.StdEncoding.EncodeToString([]byte(auth))
|
|
}
|
|
|
|
func basicDecode(encoded string) (user string, name string, err error) {
|
|
var s []byte
|
|
s, err = base64.StdEncoding.DecodeString(encoded)
|
|
if err != nil {
|
|
return user, name, err
|
|
}
|
|
|
|
a := strings.Split(string(s), ":")
|
|
if len(a) == 2 {
|
|
user, name = a[0], a[1]
|
|
} else {
|
|
err = errors.New("decode failed")
|
|
}
|
|
return user, name, err
|
|
}
|
|
|
|
func authRequired(ctx *middleware.Context) {
|
|
ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
|
|
ctx.Data["ErrorMsg"] = "no basic auth and digit auth"
|
|
ctx.HTML(401, base.TplName("status/401"))
|
|
}
|
|
|
|
func Http(ctx *middleware.Context) {
|
|
username := ctx.Params(":username")
|
|
reponame := ctx.Params(":reponame")
|
|
if strings.HasSuffix(reponame, ".git") {
|
|
reponame = reponame[:len(reponame)-4]
|
|
}
|
|
|
|
var isPull bool
|
|
service := ctx.Query("service")
|
|
if service == "git-receive-pack" ||
|
|
strings.HasSuffix(ctx.Req.URL.Path, "git-receive-pack") {
|
|
isPull = false
|
|
} else if service == "git-upload-pack" ||
|
|
strings.HasSuffix(ctx.Req.URL.Path, "git-upload-pack") {
|
|
isPull = true
|
|
} else {
|
|
isPull = (ctx.Req.Method == "GET")
|
|
}
|
|
|
|
repoUser, err := models.GetUserByName(username)
|
|
if err != nil {
|
|
if err == models.ErrUserNotExist {
|
|
ctx.Handle(404, "GetUserByName", nil)
|
|
} else {
|
|
ctx.Handle(500, "GetUserByName", err)
|
|
}
|
|
return
|
|
}
|
|
|
|
repo, err := models.GetRepositoryByName(repoUser.Id, reponame)
|
|
if err != nil {
|
|
if err == models.ErrRepoNotExist {
|
|
ctx.Handle(404, "GetRepositoryByName", nil)
|
|
} else {
|
|
ctx.Handle(500, "GetRepositoryByName", err)
|
|
}
|
|
return
|
|
}
|
|
|
|
// only public pull don't need auth
|
|
isPublicPull := !repo.IsPrivate && isPull
|
|
var askAuth = !isPublicPull || setting.Service.RequireSignInView
|
|
var authUser *models.User
|
|
var authUsername, passwd string
|
|
|
|
// check access
|
|
if askAuth {
|
|
baHead := ctx.Req.Header.Get("Authorization")
|
|
if baHead == "" {
|
|
authRequired(ctx)
|
|
return
|
|
}
|
|
|
|
auths := strings.Fields(baHead)
|
|
// currently check basic auth
|
|
// TODO: support digit auth
|
|
if len(auths) != 2 || auths[0] != "Basic" {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
}
|
|
authUsername, passwd, err = basicDecode(auths[1])
|
|
if err != nil {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
}
|
|
|
|
authUser, err = models.GetUserByName(authUsername)
|
|
if err != nil {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
}
|
|
|
|
newUser := &models.User{Passwd: passwd, Salt: authUser.Salt}
|
|
newUser.EncodePasswd()
|
|
if authUser.Passwd != newUser.Passwd {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
}
|
|
|
|
if !isPublicPull {
|
|
var tp = models.WRITABLE
|
|
if isPull {
|
|
tp = models.READABLE
|
|
}
|
|
|
|
has, err := models.HasAccess(authUsername, username+"/"+reponame, tp)
|
|
if err != nil {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
} else if !has {
|
|
if tp == models.READABLE {
|
|
has, err = models.HasAccess(authUsername, username+"/"+reponame, models.WRITABLE)
|
|
if err != nil || !has {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
}
|
|
} else {
|
|
ctx.Handle(401, "no basic auth and digit auth", nil)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var f func(rpc string, input []byte)
|
|
|
|
f = func(rpc string, input []byte) {
|
|
if rpc == "receive-pack" {
|
|
var lastLine int64 = 0
|
|
|
|
for {
|
|
head := input[lastLine : lastLine+2]
|
|
if head[0] == '0' && head[1] == '0' {
|
|
size, err := strconv.ParseInt(string(input[lastLine+2:lastLine+4]), 16, 32)
|
|
if err != nil {
|
|
log.Error(4, "%v", err)
|
|
return
|
|
}
|
|
|
|
if size == 0 {
|
|
//fmt.Println(string(input[lastLine:]))
|
|
break
|
|
}
|
|
|
|
line := input[lastLine : lastLine+size]
|
|
idx := bytes.IndexRune(line, '\000')
|
|
if idx > -1 {
|
|
line = line[:idx]
|
|
}
|
|
fields := strings.Fields(string(line))
|
|
if len(fields) >= 3 {
|
|
oldCommitId := fields[0][4:]
|
|
newCommitId := fields[1]
|
|
refName := fields[2]
|
|
|
|
models.Update(refName, oldCommitId, newCommitId, authUsername, username, reponame, authUser.Id)
|
|
}
|
|
lastLine = lastLine + size
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
config := Config{setting.RepoRootPath, "git", true, true, f}
|
|
|
|
handler := HttpBackend(&config)
|
|
handler(ctx.Resp, ctx.Req)
|
|
}
|
|
|
|
type route struct {
|
|
cr *regexp.Regexp
|
|
method string
|
|
handler func(handler)
|
|
}
|
|
|
|
type Config struct {
|
|
ReposRoot string
|
|
GitBinPath string
|
|
UploadPack bool
|
|
ReceivePack bool
|
|
OnSucceed func(rpc string, input []byte)
|
|
}
|
|
|
|
type handler struct {
|
|
*Config
|
|
w http.ResponseWriter
|
|
r *http.Request
|
|
Dir string
|
|
File string
|
|
}
|
|
|
|
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},
|
|
}
|
|
|
|
// Request handling function
|
|
func HttpBackend(config *Config) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
for _, route := range routes {
|
|
if m := route.cr.FindStringSubmatch(r.URL.Path); m != nil {
|
|
if route.method != r.Method {
|
|
renderMethodNotAllowed(w, r)
|
|
return
|
|
}
|
|
|
|
file := strings.Replace(r.URL.Path, m[1]+"/", "", 1)
|
|
dir, err := getGitDir(config, m[1])
|
|
|
|
if err != nil {
|
|
log.GitLogger.Error(4, err.Error())
|
|
renderNotFound(w)
|
|
return
|
|
}
|
|
|
|
hr := handler{config, w, r, dir, file}
|
|
route.handler(hr)
|
|
return
|
|
}
|
|
}
|
|
|
|
renderNotFound(w)
|
|
return
|
|
}
|
|
}
|
|
|
|
// Actual command handling functions
|
|
func serviceUploadPack(hr handler) {
|
|
serviceRpc("upload-pack", hr)
|
|
}
|
|
|
|
func serviceReceivePack(hr handler) {
|
|
serviceRpc("receive-pack", hr)
|
|
}
|
|
|
|
func serviceRpc(rpc string, hr handler) {
|
|
w, r, dir := hr.w, hr.r, hr.Dir
|
|
access := hasAccess(r, hr.Config, dir, rpc, true)
|
|
|
|
if access == false {
|
|
renderNoAccess(w)
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-result", rpc))
|
|
w.WriteHeader(http.StatusOK)
|
|
|
|
var input []byte
|
|
var br io.Reader
|
|
if hr.Config.OnSucceed != nil {
|
|
input, _ = ioutil.ReadAll(r.Body)
|
|
br = bytes.NewReader(input)
|
|
} else {
|
|
br = r.Body
|
|
}
|
|
|
|
args := []string{rpc, "--stateless-rpc", dir}
|
|
cmd := exec.Command(hr.Config.GitBinPath, args...)
|
|
cmd.Dir = dir
|
|
cmd.Stdout = w
|
|
cmd.Stdin = br
|
|
|
|
err := cmd.Run()
|
|
if err != nil {
|
|
log.GitLogger.Error(4, err.Error())
|
|
return
|
|
}
|
|
|
|
if hr.Config.OnSucceed != nil {
|
|
hr.Config.OnSucceed(rpc, input)
|
|
}
|
|
}
|
|
|
|
func getInfoRefs(hr handler) {
|
|
w, r, dir := hr.w, hr.r, hr.Dir
|
|
serviceName := getServiceType(r)
|
|
access := hasAccess(r, hr.Config, dir, serviceName, false)
|
|
|
|
if access {
|
|
args := []string{serviceName, "--stateless-rpc", "--advertise-refs", "."}
|
|
refs := gitCommand(hr.Config.GitBinPath, dir, args...)
|
|
|
|
hdrNocache(w)
|
|
w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", serviceName))
|
|
w.WriteHeader(http.StatusOK)
|
|
w.Write(packetWrite("# service=git-" + serviceName + "\n"))
|
|
w.Write(packetFlush())
|
|
w.Write(refs)
|
|
} else {
|
|
updateServerInfo(hr.Config.GitBinPath, dir)
|
|
hdrNocache(w)
|
|
sendFile("text/plain; charset=utf-8", hr)
|
|
}
|
|
}
|
|
|
|
func getInfoPacks(hr handler) {
|
|
hdrCacheForever(hr.w)
|
|
sendFile("text/plain; charset=utf-8", hr)
|
|
}
|
|
|
|
func getLooseObject(hr handler) {
|
|
hdrCacheForever(hr.w)
|
|
sendFile("application/x-git-loose-object", hr)
|
|
}
|
|
|
|
func getPackFile(hr handler) {
|
|
hdrCacheForever(hr.w)
|
|
sendFile("application/x-git-packed-objects", hr)
|
|
}
|
|
|
|
func getIdxFile(hr handler) {
|
|
hdrCacheForever(hr.w)
|
|
sendFile("application/x-git-packed-objects-toc", hr)
|
|
}
|
|
|
|
func getTextFile(hr handler) {
|
|
hdrNocache(hr.w)
|
|
sendFile("text/plain", hr)
|
|
}
|
|
|
|
// Logic helping functions
|
|
|
|
func sendFile(contentType string, hr handler) {
|
|
w, r := hr.w, hr.r
|
|
reqFile := path.Join(hr.Dir, hr.File)
|
|
|
|
//fmt.Println("sendFile:", reqFile)
|
|
|
|
f, err := os.Stat(reqFile)
|
|
if os.IsNotExist(err) {
|
|
renderNotFound(w)
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Type", contentType)
|
|
w.Header().Set("Content-Length", fmt.Sprintf("%d", f.Size()))
|
|
w.Header().Set("Last-Modified", f.ModTime().Format(http.TimeFormat))
|
|
http.ServeFile(w, r, reqFile)
|
|
}
|
|
|
|
func getGitDir(config *Config, fPath string) (string, error) {
|
|
root := config.ReposRoot
|
|
|
|
if root == "" {
|
|
cwd, err := os.Getwd()
|
|
|
|
if err != nil {
|
|
log.GitLogger.Error(4, err.Error())
|
|
return "", err
|
|
}
|
|
|
|
root = cwd
|
|
}
|
|
|
|
if !strings.HasSuffix(fPath, ".git") {
|
|
fPath = fPath + ".git"
|
|
}
|
|
|
|
f := filepath.Join(root, fPath)
|
|
if _, err := os.Stat(f); os.IsNotExist(err) {
|
|
return "", err
|
|
}
|
|
|
|
return f, nil
|
|
}
|
|
|
|
func getServiceType(r *http.Request) string {
|
|
serviceType := r.FormValue("service")
|
|
|
|
if s := strings.HasPrefix(serviceType, "git-"); !s {
|
|
return ""
|
|
}
|
|
|
|
return strings.Replace(serviceType, "git-", "", 1)
|
|
}
|
|
|
|
func hasAccess(r *http.Request, config *Config, dir string, rpc string, checkContentType bool) bool {
|
|
if checkContentType {
|
|
if r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", rpc) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if !(rpc == "upload-pack" || rpc == "receive-pack") {
|
|
return false
|
|
}
|
|
if rpc == "receive-pack" {
|
|
return config.ReceivePack
|
|
}
|
|
if rpc == "upload-pack" {
|
|
return config.UploadPack
|
|
}
|
|
|
|
return getConfigSetting(config.GitBinPath, rpc, dir)
|
|
}
|
|
|
|
func getConfigSetting(gitBinPath, serviceName string, dir string) bool {
|
|
serviceName = strings.Replace(serviceName, "-", "", -1)
|
|
setting := getGitConfig(gitBinPath, "http."+serviceName, dir)
|
|
|
|
if serviceName == "uploadpack" {
|
|
return setting != "false"
|
|
}
|
|
|
|
return setting == "true"
|
|
}
|
|
|
|
func getGitConfig(gitBinPath, configName string, dir string) string {
|
|
args := []string{"config", configName}
|
|
out := string(gitCommand(gitBinPath, dir, args...))
|
|
return out[0 : len(out)-1]
|
|
}
|
|
|
|
func updateServerInfo(gitBinPath, dir string) []byte {
|
|
args := []string{"update-server-info"}
|
|
return gitCommand(gitBinPath, dir, args...)
|
|
}
|
|
|
|
func gitCommand(gitBinPath, dir string, args ...string) []byte {
|
|
command := exec.Command(gitBinPath, args...)
|
|
command.Dir = dir
|
|
out, err := command.Output()
|
|
|
|
if err != nil {
|
|
log.GitLogger.Error(4, err.Error())
|
|
}
|
|
|
|
return out
|
|
}
|
|
|
|
// HTTP error response handling functions
|
|
|
|
func renderMethodNotAllowed(w http.ResponseWriter, r *http.Request) {
|
|
if r.Proto == "HTTP/1.1" {
|
|
w.WriteHeader(http.StatusMethodNotAllowed)
|
|
w.Write([]byte("Method Not Allowed"))
|
|
} else {
|
|
w.WriteHeader(http.StatusBadRequest)
|
|
w.Write([]byte("Bad Request"))
|
|
}
|
|
}
|
|
|
|
func renderNotFound(w http.ResponseWriter) {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
w.Write([]byte("Not Found"))
|
|
}
|
|
|
|
func renderNoAccess(w http.ResponseWriter) {
|
|
w.WriteHeader(http.StatusForbidden)
|
|
w.Write([]byte("Forbidden"))
|
|
}
|
|
|
|
// Packet-line handling function
|
|
|
|
func packetFlush() []byte {
|
|
return []byte("0000")
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
// Header writing functions
|
|
|
|
func hdrNocache(w http.ResponseWriter) {
|
|
w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
|
|
w.Header().Set("Pragma", "no-cache")
|
|
w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
|
|
}
|
|
|
|
func hdrCacheForever(w http.ResponseWriter) {
|
|
now := time.Now().Unix()
|
|
expires := now + 31536000
|
|
w.Header().Set("Date", fmt.Sprintf("%d", now))
|
|
w.Header().Set("Expires", fmt.Sprintf("%d", expires))
|
|
w.Header().Set("Cache-Control", "public, max-age=31536000")
|
|
}
|