http.go 11 KB

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  1. // Copyright 2014 The Gogs Authors. All rights reserved.
  2. // Use of this source code is governed by a MIT-style
  3. // license that can be found in the LICENSE file.
  4. package repo
  5. import (
  6. "bytes"
  7. "fmt"
  8. "io/ioutil"
  9. "net/http"
  10. "os"
  11. "os/exec"
  12. "path"
  13. "path/filepath"
  14. "regexp"
  15. "strconv"
  16. "strings"
  17. "time"
  18. "github.com/go-martini/martini"
  19. "github.com/gogits/gogs/models"
  20. "github.com/gogits/gogs/modules/log"
  21. "github.com/gogits/gogs/modules/middleware"
  22. "github.com/gogits/gogs/modules/setting"
  23. )
  24. func Http(ctx *middleware.Context, params martini.Params) {
  25. username := params["username"]
  26. reponame := params["reponame"]
  27. if strings.HasSuffix(reponame, ".git") {
  28. reponame = reponame[:len(reponame)-4]
  29. }
  30. var isPull bool
  31. service := ctx.Query("service")
  32. if service == "git-receive-pack" ||
  33. strings.HasSuffix(ctx.Req.URL.Path, "git-receive-pack") {
  34. isPull = false
  35. } else if service == "git-upload-pack" ||
  36. strings.HasSuffix(ctx.Req.URL.Path, "git-upload-pack") {
  37. isPull = true
  38. } else {
  39. isPull = (ctx.Req.Method == "GET")
  40. }
  41. repoUser, err := models.GetUserByName(username)
  42. if err != nil {
  43. if err == models.ErrUserNotExist {
  44. ctx.Handle(404, "repo.Http(GetUserByName)", nil)
  45. } else {
  46. ctx.Handle(500, "repo.Http(GetUserByName)", nil)
  47. }
  48. return
  49. }
  50. repo, err := models.GetRepositoryByName(repoUser.Id, reponame)
  51. if err != nil {
  52. if err == models.ErrRepoNotExist {
  53. ctx.Handle(404, "repo.Http(GetRepositoryByName)", nil)
  54. } else {
  55. ctx.Handle(500, "repo.Http(GetRepositoryByName)", nil)
  56. }
  57. return
  58. }
  59. // only public pull don't need auth
  60. isPublicPull := !repo.IsPrivate && isPull
  61. var askAuth = !isPublicPull || setting.Service.RequireSignInView
  62. var authUser *models.User
  63. var authUsername, passwd string
  64. // check access
  65. if askAuth {
  66. baHead := ctx.Req.Header.Get("Authorization")
  67. if baHead == "" {
  68. // ask auth
  69. authRequired(ctx)
  70. return
  71. }
  72. auths := strings.Fields(baHead)
  73. // currently check basic auth
  74. // TODO: support digit auth
  75. if len(auths) != 2 || auths[0] != "Basic" {
  76. ctx.Handle(401, "no basic auth and digit auth", nil)
  77. return
  78. }
  79. authUsername, passwd, err = basicDecode(auths[1])
  80. if err != nil {
  81. ctx.Handle(401, "no basic auth and digit auth", nil)
  82. return
  83. }
  84. authUser, err = models.GetUserByName(authUsername)
  85. if err != nil {
  86. ctx.Handle(401, "no basic auth and digit auth", nil)
  87. return
  88. }
  89. newUser := &models.User{Passwd: passwd, Salt: authUser.Salt}
  90. newUser.EncodePasswd()
  91. if authUser.Passwd != newUser.Passwd {
  92. ctx.Handle(401, "no basic auth and digit auth", nil)
  93. return
  94. }
  95. if !isPublicPull {
  96. var tp = models.WRITABLE
  97. if isPull {
  98. tp = models.READABLE
  99. }
  100. has, err := models.HasAccess(authUsername, username+"/"+reponame, tp)
  101. if err != nil {
  102. ctx.Handle(401, "no basic auth and digit auth", nil)
  103. return
  104. } else if !has {
  105. if tp == models.READABLE {
  106. has, err = models.HasAccess(authUsername, username+"/"+reponame, models.WRITABLE)
  107. if err != nil || !has {
  108. ctx.Handle(401, "no basic auth and digit auth", nil)
  109. return
  110. }
  111. } else {
  112. ctx.Handle(401, "no basic auth and digit auth", nil)
  113. return
  114. }
  115. }
  116. }
  117. }
  118. config := Config{setting.RepoRootPath, "git", true, true, func(rpc string, input []byte) {
  119. if rpc == "receive-pack" {
  120. firstLine := bytes.IndexRune(input, '\000')
  121. if firstLine > -1 {
  122. fields := strings.Fields(string(input[:firstLine]))
  123. if len(fields) == 3 {
  124. oldCommitId := fields[0][4:]
  125. newCommitId := fields[1]
  126. refName := fields[2]
  127. if err = models.Update(refName, oldCommitId, newCommitId, authUsername, username, reponame, authUser.Id); err != nil {
  128. log.GitLogger.Error(err.Error())
  129. return
  130. }
  131. }
  132. }
  133. }
  134. }}
  135. handler := HttpBackend(&config)
  136. handler(ctx.ResponseWriter, ctx.Req)
  137. }
  138. type route struct {
  139. cr *regexp.Regexp
  140. method string
  141. handler func(handler)
  142. }
  143. type Config struct {
  144. ReposRoot string
  145. GitBinPath string
  146. UploadPack bool
  147. ReceivePack bool
  148. OnSucceed func(rpc string, input []byte)
  149. }
  150. type handler struct {
  151. *Config
  152. w http.ResponseWriter
  153. r *http.Request
  154. Dir string
  155. File string
  156. }
  157. var routes = []route{
  158. {regexp.MustCompile("(.*?)/git-upload-pack$"), "POST", serviceUploadPack},
  159. {regexp.MustCompile("(.*?)/git-receive-pack$"), "POST", serviceReceivePack},
  160. {regexp.MustCompile("(.*?)/info/refs$"), "GET", getInfoRefs},
  161. {regexp.MustCompile("(.*?)/HEAD$"), "GET", getTextFile},
  162. {regexp.MustCompile("(.*?)/objects/info/alternates$"), "GET", getTextFile},
  163. {regexp.MustCompile("(.*?)/objects/info/http-alternates$"), "GET", getTextFile},
  164. {regexp.MustCompile("(.*?)/objects/info/packs$"), "GET", getInfoPacks},
  165. {regexp.MustCompile("(.*?)/objects/info/[^/]*$"), "GET", getTextFile},
  166. {regexp.MustCompile("(.*?)/objects/[0-9a-f]{2}/[0-9a-f]{38}$"), "GET", getLooseObject},
  167. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.pack$"), "GET", getPackFile},
  168. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.idx$"), "GET", getIdxFile},
  169. }
  170. // Request handling function
  171. func HttpBackend(config *Config) http.HandlerFunc {
  172. return func(w http.ResponseWriter, r *http.Request) {
  173. for _, route := range routes {
  174. if m := route.cr.FindStringSubmatch(r.URL.Path); m != nil {
  175. if route.method != r.Method {
  176. renderMethodNotAllowed(w, r)
  177. return
  178. }
  179. file := strings.Replace(r.URL.Path, m[1]+"/", "", 1)
  180. dir, err := getGitDir(config, m[1])
  181. if err != nil {
  182. log.GitLogger.Error(err.Error())
  183. renderNotFound(w)
  184. return
  185. }
  186. hr := handler{config, w, r, dir, file}
  187. route.handler(hr)
  188. return
  189. }
  190. }
  191. renderNotFound(w)
  192. return
  193. }
  194. }
  195. // Actual command handling functions
  196. func serviceUploadPack(hr handler) {
  197. serviceRpc("upload-pack", hr)
  198. }
  199. func serviceReceivePack(hr handler) {
  200. serviceRpc("receive-pack", hr)
  201. }
  202. func serviceRpc(rpc string, hr handler) {
  203. w, r, dir := hr.w, hr.r, hr.Dir
  204. access := hasAccess(r, hr.Config, dir, rpc, true)
  205. if access == false {
  206. renderNoAccess(w)
  207. return
  208. }
  209. w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-result", rpc))
  210. w.WriteHeader(http.StatusOK)
  211. input, _ := ioutil.ReadAll(r.Body)
  212. br := bytes.NewReader(input)
  213. args := []string{rpc, "--stateless-rpc", dir}
  214. cmd := exec.Command(hr.Config.GitBinPath, args...)
  215. cmd.Dir = dir
  216. cmd.Stdout = w
  217. cmd.Stdin = br
  218. err := cmd.Run()
  219. if err != nil {
  220. log.GitLogger.Error(err.Error())
  221. return
  222. }
  223. if hr.Config.OnSucceed != nil {
  224. hr.Config.OnSucceed(rpc, input)
  225. }
  226. }
  227. func getInfoRefs(hr handler) {
  228. w, r, dir := hr.w, hr.r, hr.Dir
  229. serviceName := getServiceType(r)
  230. access := hasAccess(r, hr.Config, dir, serviceName, false)
  231. if access {
  232. args := []string{serviceName, "--stateless-rpc", "--advertise-refs", "."}
  233. refs := gitCommand(hr.Config.GitBinPath, dir, args...)
  234. hdrNocache(w)
  235. w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", serviceName))
  236. w.WriteHeader(http.StatusOK)
  237. w.Write(packetWrite("# service=git-" + serviceName + "\n"))
  238. w.Write(packetFlush())
  239. w.Write(refs)
  240. } else {
  241. updateServerInfo(hr.Config.GitBinPath, dir)
  242. hdrNocache(w)
  243. sendFile("text/plain; charset=utf-8", hr)
  244. }
  245. }
  246. func getInfoPacks(hr handler) {
  247. hdrCacheForever(hr.w)
  248. sendFile("text/plain; charset=utf-8", hr)
  249. }
  250. func getLooseObject(hr handler) {
  251. hdrCacheForever(hr.w)
  252. sendFile("application/x-git-loose-object", hr)
  253. }
  254. func getPackFile(hr handler) {
  255. hdrCacheForever(hr.w)
  256. sendFile("application/x-git-packed-objects", hr)
  257. }
  258. func getIdxFile(hr handler) {
  259. hdrCacheForever(hr.w)
  260. sendFile("application/x-git-packed-objects-toc", hr)
  261. }
  262. func getTextFile(hr handler) {
  263. hdrNocache(hr.w)
  264. sendFile("text/plain", hr)
  265. }
  266. // Logic helping functions
  267. func sendFile(contentType string, hr handler) {
  268. w, r := hr.w, hr.r
  269. reqFile := path.Join(hr.Dir, hr.File)
  270. //fmt.Println("sendFile:", reqFile)
  271. f, err := os.Stat(reqFile)
  272. if os.IsNotExist(err) {
  273. renderNotFound(w)
  274. return
  275. }
  276. w.Header().Set("Content-Type", contentType)
  277. w.Header().Set("Content-Length", fmt.Sprintf("%d", f.Size()))
  278. w.Header().Set("Last-Modified", f.ModTime().Format(http.TimeFormat))
  279. http.ServeFile(w, r, reqFile)
  280. }
  281. func getGitDir(config *Config, fPath string) (string, error) {
  282. root := config.ReposRoot
  283. if root == "" {
  284. cwd, err := os.Getwd()
  285. if err != nil {
  286. log.GitLogger.Error(err.Error())
  287. return "", err
  288. }
  289. root = cwd
  290. }
  291. if !strings.HasSuffix(fPath, ".git") {
  292. fPath = fPath + ".git"
  293. }
  294. f := filepath.Join(root, fPath)
  295. if _, err := os.Stat(f); os.IsNotExist(err) {
  296. return "", err
  297. }
  298. return f, nil
  299. }
  300. func getServiceType(r *http.Request) string {
  301. serviceType := r.FormValue("service")
  302. if s := strings.HasPrefix(serviceType, "git-"); !s {
  303. return ""
  304. }
  305. return strings.Replace(serviceType, "git-", "", 1)
  306. }
  307. func hasAccess(r *http.Request, config *Config, dir string, rpc string, checkContentType bool) bool {
  308. if checkContentType {
  309. if r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", rpc) {
  310. return false
  311. }
  312. }
  313. if !(rpc == "upload-pack" || rpc == "receive-pack") {
  314. return false
  315. }
  316. if rpc == "receive-pack" {
  317. return config.ReceivePack
  318. }
  319. if rpc == "upload-pack" {
  320. return config.UploadPack
  321. }
  322. return getConfigSetting(config.GitBinPath, rpc, dir)
  323. }
  324. func getConfigSetting(gitBinPath, serviceName string, dir string) bool {
  325. serviceName = strings.Replace(serviceName, "-", "", -1)
  326. setting := getGitConfig(gitBinPath, "http."+serviceName, dir)
  327. if serviceName == "uploadpack" {
  328. return setting != "false"
  329. }
  330. return setting == "true"
  331. }
  332. func getGitConfig(gitBinPath, configName string, dir string) string {
  333. args := []string{"config", configName}
  334. out := string(gitCommand(gitBinPath, dir, args...))
  335. return out[0 : len(out)-1]
  336. }
  337. func updateServerInfo(gitBinPath, dir string) []byte {
  338. args := []string{"update-server-info"}
  339. return gitCommand(gitBinPath, dir, args...)
  340. }
  341. func gitCommand(gitBinPath, dir string, args ...string) []byte {
  342. command := exec.Command(gitBinPath, args...)
  343. command.Dir = dir
  344. out, err := command.Output()
  345. if err != nil {
  346. log.GitLogger.Error(err.Error())
  347. }
  348. return out
  349. }
  350. // HTTP error response handling functions
  351. func renderMethodNotAllowed(w http.ResponseWriter, r *http.Request) {
  352. if r.Proto == "HTTP/1.1" {
  353. w.WriteHeader(http.StatusMethodNotAllowed)
  354. w.Write([]byte("Method Not Allowed"))
  355. } else {
  356. w.WriteHeader(http.StatusBadRequest)
  357. w.Write([]byte("Bad Request"))
  358. }
  359. }
  360. func renderNotFound(w http.ResponseWriter) {
  361. w.WriteHeader(http.StatusNotFound)
  362. w.Write([]byte("Not Found"))
  363. }
  364. func renderNoAccess(w http.ResponseWriter) {
  365. w.WriteHeader(http.StatusForbidden)
  366. w.Write([]byte("Forbidden"))
  367. }
  368. // Packet-line handling function
  369. func packetFlush() []byte {
  370. return []byte("0000")
  371. }
  372. func packetWrite(str string) []byte {
  373. s := strconv.FormatInt(int64(len(str)+4), 16)
  374. if len(s)%4 != 0 {
  375. s = strings.Repeat("0", 4-len(s)%4) + s
  376. }
  377. return []byte(s + str)
  378. }
  379. // Header writing functions
  380. func hdrNocache(w http.ResponseWriter) {
  381. w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
  382. w.Header().Set("Pragma", "no-cache")
  383. w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
  384. }
  385. func hdrCacheForever(w http.ResponseWriter) {
  386. now := time.Now().Unix()
  387. expires := now + 31536000
  388. w.Header().Set("Date", fmt.Sprintf("%d", now))
  389. w.Header().Set("Expires", fmt.Sprintf("%d", expires))
  390. w.Header().Set("Cache-Control", "public, max-age=31536000")
  391. }