http.go 13 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. "compress/gzip"
  8. "fmt"
  9. "io"
  10. "io/ioutil"
  11. "net/http"
  12. "os"
  13. "os/exec"
  14. "path"
  15. "regexp"
  16. "runtime"
  17. "strconv"
  18. "strings"
  19. "time"
  20. "github.com/gogits/gogs/models"
  21. "github.com/gogits/gogs/modules/base"
  22. "github.com/gogits/gogs/modules/context"
  23. "github.com/gogits/gogs/modules/log"
  24. "github.com/gogits/gogs/modules/setting"
  25. )
  26. func HTTP(ctx *context.Context) {
  27. username := ctx.Params(":username")
  28. reponame := strings.TrimSuffix(ctx.Params(":reponame"), ".git")
  29. var isPull bool
  30. service := ctx.Query("service")
  31. if service == "git-receive-pack" ||
  32. strings.HasSuffix(ctx.Req.URL.Path, "git-receive-pack") {
  33. isPull = false
  34. } else if service == "git-upload-pack" ||
  35. strings.HasSuffix(ctx.Req.URL.Path, "git-upload-pack") {
  36. isPull = true
  37. } else {
  38. isPull = (ctx.Req.Method == "GET")
  39. }
  40. isWiki := false
  41. if strings.HasSuffix(reponame, ".wiki") {
  42. isWiki = true
  43. reponame = reponame[:len(reponame)-5]
  44. }
  45. repoUser, err := models.GetUserByName(username)
  46. if err != nil {
  47. if models.IsErrUserNotExist(err) {
  48. ctx.Handle(http.StatusNotFound, "GetUserByName", nil)
  49. } else {
  50. ctx.Handle(http.StatusInternalServerError, "GetUserByName", err)
  51. }
  52. return
  53. }
  54. repo, err := models.GetRepositoryByName(repoUser.ID, reponame)
  55. if err != nil {
  56. if models.IsErrRepoNotExist(err) {
  57. ctx.Handle(http.StatusNotFound, "GetRepositoryByName", nil)
  58. } else {
  59. ctx.Handle(http.StatusInternalServerError, "GetRepositoryByName", err)
  60. }
  61. return
  62. }
  63. // Only public pull don't need auth.
  64. isPublicPull := !repo.IsPrivate && isPull
  65. var (
  66. askAuth = !isPublicPull || setting.Service.RequireSignInView
  67. authUser *models.User
  68. authUsername string
  69. authPasswd string
  70. )
  71. // check access
  72. if askAuth {
  73. authHead := ctx.Req.Header.Get("Authorization")
  74. if len(authHead) == 0 {
  75. ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
  76. ctx.Error(http.StatusUnauthorized)
  77. return
  78. }
  79. auths := strings.Fields(authHead)
  80. // currently check basic auth
  81. // TODO: support digit auth
  82. // FIXME: middlewares/context.go did basic auth check already,
  83. // maybe could use that one.
  84. if len(auths) != 2 || auths[0] != "Basic" {
  85. ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
  86. return
  87. }
  88. authUsername, authPasswd, err = base.BasicAuthDecode(auths[1])
  89. if err != nil {
  90. ctx.HandleText(http.StatusUnauthorized, "no basic auth and digit auth")
  91. return
  92. }
  93. authUser, err = models.UserSignIn(authUsername, authPasswd)
  94. if err != nil {
  95. if !models.IsErrUserNotExist(err) {
  96. ctx.Handle(http.StatusInternalServerError, "UserSignIn error: %v", err)
  97. return
  98. }
  99. // Assume username now is a token.
  100. token, err := models.GetAccessTokenBySHA(authUsername)
  101. if err != nil {
  102. if models.IsErrAccessTokenNotExist(err) || models.IsErrAccessTokenEmpty(err) {
  103. ctx.HandleText(http.StatusUnauthorized, "invalid token")
  104. } else {
  105. ctx.Handle(http.StatusInternalServerError, "GetAccessTokenBySha", err)
  106. }
  107. return
  108. }
  109. token.Updated = time.Now()
  110. if err = models.UpdateAccessToken(token); err != nil {
  111. ctx.Handle(http.StatusInternalServerError, "UpdateAccessToken", err)
  112. }
  113. authUser, err = models.GetUserByID(token.UID)
  114. if err != nil {
  115. ctx.Handle(http.StatusInternalServerError, "GetUserByID", err)
  116. return
  117. }
  118. }
  119. if !isPublicPull {
  120. var tp = models.ACCESS_MODE_WRITE
  121. if isPull {
  122. tp = models.ACCESS_MODE_READ
  123. }
  124. has, err := models.HasAccess(authUser, repo, tp)
  125. if err != nil {
  126. ctx.Handle(http.StatusInternalServerError, "HasAccess", err)
  127. return
  128. } else if !has {
  129. if tp == models.ACCESS_MODE_READ {
  130. has, err = models.HasAccess(authUser, repo, models.ACCESS_MODE_WRITE)
  131. if err != nil {
  132. ctx.Handle(http.StatusInternalServerError, "HasAccess2", err)
  133. return
  134. } else if !has {
  135. ctx.HandleText(http.StatusForbidden, "User permission denied")
  136. return
  137. }
  138. } else {
  139. ctx.HandleText(http.StatusForbidden, "User permission denied")
  140. return
  141. }
  142. }
  143. if !isPull && repo.IsMirror {
  144. ctx.HandleText(http.StatusForbidden, "mirror repository is read-only")
  145. return
  146. }
  147. }
  148. }
  149. callback := func(rpc string, input []byte) {
  150. if rpc != "receive-pack" || isWiki {
  151. return
  152. }
  153. var lastLine int64 = 0
  154. for {
  155. head := input[lastLine : lastLine+2]
  156. if head[0] == '0' && head[1] == '0' {
  157. size, err := strconv.ParseInt(string(input[lastLine+2:lastLine+4]), 16, 32)
  158. if err != nil {
  159. log.Error(4, "%v", err)
  160. return
  161. }
  162. if size == 0 {
  163. //fmt.Println(string(input[lastLine:]))
  164. break
  165. }
  166. line := input[lastLine : lastLine+size]
  167. idx := bytes.IndexRune(line, '\000')
  168. if idx > -1 {
  169. line = line[:idx]
  170. }
  171. fields := strings.Fields(string(line))
  172. if len(fields) >= 3 {
  173. oldCommitId := fields[0][4:]
  174. newCommitId := fields[1]
  175. refName := fields[2]
  176. // FIXME: handle error.
  177. if err = models.PushUpdate(models.PushUpdateOptions{
  178. RefName: refName,
  179. OldCommitID: oldCommitId,
  180. NewCommitID: newCommitId,
  181. PusherID: authUser.ID,
  182. PusherName: authUser.Name,
  183. RepoUserName: username,
  184. RepoName: reponame,
  185. }); err == nil {
  186. go models.HookQueue.Add(repo.ID)
  187. go models.AddTestPullRequestTask(repo.ID, strings.TrimPrefix(refName, "refs/heads/"))
  188. }
  189. }
  190. lastLine = lastLine + size
  191. } else {
  192. break
  193. }
  194. }
  195. }
  196. HTTPBackend(ctx, &serviceConfig{
  197. UploadPack: true,
  198. ReceivePack: true,
  199. OnSucceed: callback,
  200. })(ctx.Resp, ctx.Req.Request)
  201. runtime.GC()
  202. }
  203. type serviceConfig struct {
  204. UploadPack bool
  205. ReceivePack bool
  206. OnSucceed func(rpc string, input []byte)
  207. }
  208. type serviceHandler struct {
  209. cfg *serviceConfig
  210. w http.ResponseWriter
  211. r *http.Request
  212. dir string
  213. file string
  214. }
  215. func (h *serviceHandler) setHeaderNoCache() {
  216. h.w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
  217. h.w.Header().Set("Pragma", "no-cache")
  218. h.w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
  219. }
  220. func (h *serviceHandler) setHeaderCacheForever() {
  221. now := time.Now().Unix()
  222. expires := now + 31536000
  223. h.w.Header().Set("Date", fmt.Sprintf("%d", now))
  224. h.w.Header().Set("Expires", fmt.Sprintf("%d", expires))
  225. h.w.Header().Set("Cache-Control", "public, max-age=31536000")
  226. }
  227. func (h *serviceHandler) sendFile(contentType string) {
  228. reqFile := path.Join(h.dir, h.file)
  229. fi, err := os.Stat(reqFile)
  230. if os.IsNotExist(err) {
  231. h.w.WriteHeader(http.StatusNotFound)
  232. return
  233. }
  234. h.w.Header().Set("Content-Type", contentType)
  235. h.w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
  236. h.w.Header().Set("Last-Modified", fi.ModTime().Format(http.TimeFormat))
  237. http.ServeFile(h.w, h.r, reqFile)
  238. }
  239. type route struct {
  240. reg *regexp.Regexp
  241. method string
  242. handler func(serviceHandler)
  243. }
  244. var routes = []route{
  245. {regexp.MustCompile("(.*?)/git-upload-pack$"), "POST", serviceUploadPack},
  246. {regexp.MustCompile("(.*?)/git-receive-pack$"), "POST", serviceReceivePack},
  247. {regexp.MustCompile("(.*?)/info/refs$"), "GET", getInfoRefs},
  248. {regexp.MustCompile("(.*?)/HEAD$"), "GET", getTextFile},
  249. {regexp.MustCompile("(.*?)/objects/info/alternates$"), "GET", getTextFile},
  250. {regexp.MustCompile("(.*?)/objects/info/http-alternates$"), "GET", getTextFile},
  251. {regexp.MustCompile("(.*?)/objects/info/packs$"), "GET", getInfoPacks},
  252. {regexp.MustCompile("(.*?)/objects/info/[^/]*$"), "GET", getTextFile},
  253. {regexp.MustCompile("(.*?)/objects/[0-9a-f]{2}/[0-9a-f]{38}$"), "GET", getLooseObject},
  254. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.pack$"), "GET", getPackFile},
  255. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.idx$"), "GET", getIdxFile},
  256. }
  257. // FIXME: use process module
  258. func gitCommand(dir string, args ...string) []byte {
  259. cmd := exec.Command("git", args...)
  260. cmd.Dir = dir
  261. out, err := cmd.Output()
  262. if err != nil {
  263. log.GitLogger.Error(4, fmt.Sprintf("%v - %s", err, out))
  264. }
  265. return out
  266. }
  267. func getGitConfig(option, dir string) string {
  268. out := string(gitCommand(dir, "config", option))
  269. return out[0 : len(out)-1]
  270. }
  271. func getConfigSetting(service, dir string) bool {
  272. service = strings.Replace(service, "-", "", -1)
  273. setting := getGitConfig("http."+service, dir)
  274. if service == "uploadpack" {
  275. return setting != "false"
  276. }
  277. return setting == "true"
  278. }
  279. func hasAccess(service string, h serviceHandler, checkContentType bool) bool {
  280. if checkContentType {
  281. if h.r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", service) {
  282. return false
  283. }
  284. }
  285. if !(service == "upload-pack" || service == "receive-pack") {
  286. return false
  287. }
  288. if service == "receive-pack" {
  289. return h.cfg.ReceivePack
  290. }
  291. if service == "upload-pack" {
  292. return h.cfg.UploadPack
  293. }
  294. return getConfigSetting(service, h.dir)
  295. }
  296. func serviceRPC(h serviceHandler, service string) {
  297. defer h.r.Body.Close()
  298. if !hasAccess(service, h, true) {
  299. h.w.WriteHeader(http.StatusUnauthorized)
  300. return
  301. }
  302. h.w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-result", service))
  303. var (
  304. reqBody = h.r.Body
  305. input []byte
  306. br io.Reader
  307. err error
  308. )
  309. // Handle GZIP.
  310. if h.r.Header.Get("Content-Encoding") == "gzip" {
  311. reqBody, err = gzip.NewReader(reqBody)
  312. if err != nil {
  313. log.GitLogger.Error(2, "fail to create gzip reader: %v", err)
  314. h.w.WriteHeader(http.StatusInternalServerError)
  315. return
  316. }
  317. }
  318. if h.cfg.OnSucceed != nil {
  319. input, err = ioutil.ReadAll(reqBody)
  320. if err != nil {
  321. log.GitLogger.Error(2, "fail to read request body: %v", err)
  322. h.w.WriteHeader(http.StatusInternalServerError)
  323. return
  324. }
  325. br = bytes.NewReader(input)
  326. } else {
  327. br = reqBody
  328. }
  329. cmd := exec.Command("git", service, "--stateless-rpc", h.dir)
  330. cmd.Dir = h.dir
  331. cmd.Stdout = h.w
  332. cmd.Stdin = br
  333. if err := cmd.Run(); err != nil {
  334. log.GitLogger.Error(2, "fail to serve RPC(%s): %v", service, err)
  335. h.w.WriteHeader(http.StatusInternalServerError)
  336. return
  337. }
  338. if h.cfg.OnSucceed != nil {
  339. h.cfg.OnSucceed(service, input)
  340. }
  341. }
  342. func serviceUploadPack(h serviceHandler) {
  343. serviceRPC(h, "upload-pack")
  344. }
  345. func serviceReceivePack(h serviceHandler) {
  346. serviceRPC(h, "receive-pack")
  347. }
  348. func getServiceType(r *http.Request) string {
  349. serviceType := r.FormValue("service")
  350. if !strings.HasPrefix(serviceType, "git-") {
  351. return ""
  352. }
  353. return strings.Replace(serviceType, "git-", "", 1)
  354. }
  355. func updateServerInfo(dir string) []byte {
  356. return gitCommand(dir, "update-server-info")
  357. }
  358. func packetWrite(str string) []byte {
  359. s := strconv.FormatInt(int64(len(str)+4), 16)
  360. if len(s)%4 != 0 {
  361. s = strings.Repeat("0", 4-len(s)%4) + s
  362. }
  363. return []byte(s + str)
  364. }
  365. func getInfoRefs(h serviceHandler) {
  366. h.setHeaderNoCache()
  367. if hasAccess(getServiceType(h.r), h, false) {
  368. service := getServiceType(h.r)
  369. refs := gitCommand(h.dir, service, "--stateless-rpc", "--advertise-refs", ".")
  370. h.w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", service))
  371. h.w.WriteHeader(http.StatusOK)
  372. h.w.Write(packetWrite("# service=git-" + service + "\n"))
  373. h.w.Write([]byte("0000"))
  374. h.w.Write(refs)
  375. } else {
  376. updateServerInfo(h.dir)
  377. h.sendFile("text/plain; charset=utf-8")
  378. }
  379. }
  380. func getTextFile(h serviceHandler) {
  381. h.setHeaderNoCache()
  382. h.sendFile("text/plain")
  383. }
  384. func getInfoPacks(h serviceHandler) {
  385. h.setHeaderCacheForever()
  386. h.sendFile("text/plain; charset=utf-8")
  387. }
  388. func getLooseObject(h serviceHandler) {
  389. h.setHeaderCacheForever()
  390. h.sendFile("application/x-git-loose-object")
  391. }
  392. func getPackFile(h serviceHandler) {
  393. h.setHeaderCacheForever()
  394. h.sendFile("application/x-git-packed-objects")
  395. }
  396. func getIdxFile(h serviceHandler) {
  397. h.setHeaderCacheForever()
  398. h.sendFile("application/x-git-packed-objects-toc")
  399. }
  400. func getGitRepoPath(subdir string) (string, error) {
  401. if !strings.HasSuffix(subdir, ".git") {
  402. subdir += ".git"
  403. }
  404. fpath := path.Join(setting.RepoRootPath, subdir)
  405. if _, err := os.Stat(fpath); os.IsNotExist(err) {
  406. return "", err
  407. }
  408. return fpath, nil
  409. }
  410. func HTTPBackend(ctx *context.Context, cfg *serviceConfig) http.HandlerFunc {
  411. return func(w http.ResponseWriter, r *http.Request) {
  412. for _, route := range routes {
  413. r.URL.Path = strings.ToLower(r.URL.Path) // blue: In case some repo name has upper case name
  414. if m := route.reg.FindStringSubmatch(r.URL.Path); m != nil {
  415. if route.method != r.Method {
  416. if r.Proto == "HTTP/1.1" {
  417. w.WriteHeader(http.StatusMethodNotAllowed)
  418. w.Write([]byte("Method Not Allowed"))
  419. } else {
  420. w.WriteHeader(http.StatusBadRequest)
  421. w.Write([]byte("Bad Request"))
  422. }
  423. return
  424. }
  425. file := strings.Replace(r.URL.Path, m[1]+"/", "", 1)
  426. dir, err := getGitRepoPath(m[1])
  427. if err != nil {
  428. log.GitLogger.Error(4, err.Error())
  429. ctx.Handle(http.StatusNotFound, "HTTPBackend", err)
  430. return
  431. }
  432. route.handler(serviceHandler{cfg, w, r, dir, file})
  433. return
  434. }
  435. }
  436. ctx.Handle(http.StatusNotFound, "HTTPBackend", nil)
  437. return
  438. }
  439. }