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. "path/filepath"
  16. "regexp"
  17. "runtime"
  18. "strconv"
  19. "strings"
  20. "time"
  21. "github.com/gogits/gogs/models"
  22. "github.com/gogits/gogs/modules/base"
  23. "github.com/gogits/gogs/modules/log"
  24. "github.com/gogits/gogs/modules/middleware"
  25. "github.com/gogits/gogs/modules/setting"
  26. )
  27. func authRequired(ctx *middleware.Context) {
  28. ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=\".\"")
  29. ctx.Data["ErrorMsg"] = "no basic auth and digit auth"
  30. ctx.Error(401)
  31. }
  32. func HTTP(ctx *middleware.Context) {
  33. username := ctx.Params(":username")
  34. reponame := strings.TrimSuffix(ctx.Params(":reponame"), ".git")
  35. var isPull bool
  36. service := ctx.Query("service")
  37. if service == "git-receive-pack" ||
  38. strings.HasSuffix(ctx.Req.URL.Path, "git-receive-pack") {
  39. isPull = false
  40. } else if service == "git-upload-pack" ||
  41. strings.HasSuffix(ctx.Req.URL.Path, "git-upload-pack") {
  42. isPull = true
  43. } else {
  44. isPull = (ctx.Req.Method == "GET")
  45. }
  46. isWiki := false
  47. if strings.HasSuffix(reponame, ".wiki") {
  48. isWiki = true
  49. reponame = reponame[:len(reponame)-5]
  50. }
  51. repoUser, err := models.GetUserByName(username)
  52. if err != nil {
  53. if models.IsErrUserNotExist(err) {
  54. ctx.Handle(404, "GetUserByName", nil)
  55. } else {
  56. ctx.Handle(500, "GetUserByName", err)
  57. }
  58. return
  59. }
  60. repo, err := models.GetRepositoryByName(repoUser.Id, reponame)
  61. if err != nil {
  62. if models.IsErrRepoNotExist(err) {
  63. ctx.Handle(404, "GetRepositoryByName", nil)
  64. } else {
  65. ctx.Handle(500, "GetRepositoryByName", err)
  66. }
  67. return
  68. }
  69. // Only public pull don't need auth.
  70. isPublicPull := !repo.IsPrivate && isPull
  71. var (
  72. askAuth = !isPublicPull || setting.Service.RequireSignInView
  73. authUser *models.User
  74. authUsername string
  75. authPasswd string
  76. )
  77. // check access
  78. if askAuth {
  79. authHead := ctx.Req.Header.Get("Authorization")
  80. if len(authHead) == 0 {
  81. authRequired(ctx)
  82. return
  83. }
  84. auths := strings.Fields(authHead)
  85. // currently check basic auth
  86. // TODO: support digit auth
  87. // FIXME: middlewares/context.go did basic auth check already,
  88. // maybe could use that one.
  89. if len(auths) != 2 || auths[0] != "Basic" {
  90. ctx.HandleText(401, "no basic auth and digit auth")
  91. return
  92. }
  93. authUsername, authPasswd, err = base.BasicAuthDecode(auths[1])
  94. if err != nil {
  95. ctx.HandleText(401, "no basic auth and digit auth")
  96. return
  97. }
  98. authUser, err = models.UserSignIn(authUsername, authPasswd)
  99. if err != nil {
  100. if !models.IsErrUserNotExist(err) {
  101. ctx.Handle(500, "UserSignIn error: %v", err)
  102. return
  103. }
  104. // Assume username now is a token.
  105. token, err := models.GetAccessTokenBySHA(authUsername)
  106. if err != nil {
  107. if models.IsErrAccessTokenNotExist(err) {
  108. ctx.HandleText(401, "invalid token")
  109. } else {
  110. ctx.Handle(500, "GetAccessTokenBySha", err)
  111. }
  112. return
  113. }
  114. token.Updated = time.Now()
  115. if err = models.UpdateAccessToekn(token); err != nil {
  116. ctx.Handle(500, "UpdateAccessToekn", err)
  117. }
  118. authUser, err = models.GetUserByID(token.UID)
  119. if err != nil {
  120. ctx.Handle(500, "GetUserByID", err)
  121. return
  122. }
  123. authUsername = authUser.Name
  124. }
  125. if !isPublicPull {
  126. var tp = models.ACCESS_MODE_WRITE
  127. if isPull {
  128. tp = models.ACCESS_MODE_READ
  129. }
  130. has, err := models.HasAccess(authUser, repo, tp)
  131. if err != nil {
  132. ctx.Handle(500, "HasAccess", err)
  133. return
  134. } else if !has {
  135. if tp == models.ACCESS_MODE_READ {
  136. has, err = models.HasAccess(authUser, repo, models.ACCESS_MODE_WRITE)
  137. if err != nil {
  138. ctx.Handle(500, "HasAccess2", err)
  139. return
  140. } else if !has {
  141. ctx.HandleText(403, "User permission denied")
  142. return
  143. }
  144. } else {
  145. ctx.HandleText(403, "User permission denied")
  146. return
  147. }
  148. }
  149. if !isPull && repo.IsMirror {
  150. ctx.HandleText(403, "mirror repository is read-only")
  151. return
  152. }
  153. }
  154. }
  155. callback := func(rpc string, input []byte) {
  156. if rpc != "receive-pack" || isWiki {
  157. return
  158. }
  159. var lastLine int64 = 0
  160. for {
  161. head := input[lastLine : lastLine+2]
  162. if head[0] == '0' && head[1] == '0' {
  163. size, err := strconv.ParseInt(string(input[lastLine+2:lastLine+4]), 16, 32)
  164. if err != nil {
  165. log.Error(4, "%v", err)
  166. return
  167. }
  168. if size == 0 {
  169. //fmt.Println(string(input[lastLine:]))
  170. break
  171. }
  172. line := input[lastLine : lastLine+size]
  173. idx := bytes.IndexRune(line, '\000')
  174. if idx > -1 {
  175. line = line[:idx]
  176. }
  177. fields := strings.Fields(string(line))
  178. if len(fields) >= 3 {
  179. oldCommitId := fields[0][4:]
  180. newCommitId := fields[1]
  181. refName := fields[2]
  182. // FIXME: handle error.
  183. if err = models.Update(refName, oldCommitId, newCommitId, authUsername, username, reponame, authUser.Id); err == nil {
  184. go models.HookQueue.Add(repo.ID)
  185. go models.AddTestPullRequestTask(repo.ID, strings.TrimPrefix(refName, "refs/heads/"))
  186. }
  187. }
  188. lastLine = lastLine + size
  189. } else {
  190. break
  191. }
  192. }
  193. }
  194. HTTPBackend(&Config{
  195. RepoRootPath: setting.RepoRootPath,
  196. GitBinPath: "git",
  197. UploadPack: true,
  198. ReceivePack: true,
  199. OnSucceed: callback,
  200. })(ctx.Resp, ctx.Req.Request)
  201. runtime.GC()
  202. }
  203. type Config struct {
  204. RepoRootPath string
  205. GitBinPath string
  206. UploadPack bool
  207. ReceivePack bool
  208. OnSucceed func(rpc string, input []byte)
  209. }
  210. type handler struct {
  211. *Config
  212. w http.ResponseWriter
  213. r *http.Request
  214. Dir string
  215. File string
  216. }
  217. type route struct {
  218. cr *regexp.Regexp
  219. method string
  220. handler func(handler)
  221. }
  222. var routes = []route{
  223. {regexp.MustCompile("(.*?)/git-upload-pack$"), "POST", serviceUploadPack},
  224. {regexp.MustCompile("(.*?)/git-receive-pack$"), "POST", serviceReceivePack},
  225. {regexp.MustCompile("(.*?)/info/refs$"), "GET", getInfoRefs},
  226. {regexp.MustCompile("(.*?)/HEAD$"), "GET", getTextFile},
  227. {regexp.MustCompile("(.*?)/objects/info/alternates$"), "GET", getTextFile},
  228. {regexp.MustCompile("(.*?)/objects/info/http-alternates$"), "GET", getTextFile},
  229. {regexp.MustCompile("(.*?)/objects/info/packs$"), "GET", getInfoPacks},
  230. {regexp.MustCompile("(.*?)/objects/info/[^/]*$"), "GET", getTextFile},
  231. {regexp.MustCompile("(.*?)/objects/[0-9a-f]{2}/[0-9a-f]{38}$"), "GET", getLooseObject},
  232. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.pack$"), "GET", getPackFile},
  233. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.idx$"), "GET", getIdxFile},
  234. }
  235. func getGitDir(config *Config, fPath string) (string, error) {
  236. root := config.RepoRootPath
  237. if len(root) == 0 {
  238. cwd, err := os.Getwd()
  239. if err != nil {
  240. log.GitLogger.Error(4, err.Error())
  241. return "", err
  242. }
  243. root = cwd
  244. }
  245. if !strings.HasSuffix(fPath, ".git") {
  246. fPath = fPath + ".git"
  247. }
  248. f := filepath.Join(root, fPath)
  249. if _, err := os.Stat(f); os.IsNotExist(err) {
  250. return "", err
  251. }
  252. return f, nil
  253. }
  254. // Request handling function
  255. func HTTPBackend(config *Config) http.HandlerFunc {
  256. return func(w http.ResponseWriter, r *http.Request) {
  257. for _, route := range routes {
  258. r.URL.Path = strings.ToLower(r.URL.Path) // blue: In case some repo name has upper case name
  259. if m := route.cr.FindStringSubmatch(r.URL.Path); m != nil {
  260. if route.method != r.Method {
  261. renderMethodNotAllowed(w, r)
  262. return
  263. }
  264. file := strings.Replace(r.URL.Path, m[1]+"/", "", 1)
  265. dir, err := getGitDir(config, m[1])
  266. if err != nil {
  267. log.GitLogger.Error(4, err.Error())
  268. renderNotFound(w)
  269. return
  270. }
  271. route.handler(handler{config, w, r, dir, file})
  272. return
  273. }
  274. }
  275. renderNotFound(w)
  276. return
  277. }
  278. }
  279. // Actual command handling functions
  280. func serviceUploadPack(hr handler) {
  281. serviceRpc("upload-pack", hr)
  282. }
  283. func serviceReceivePack(hr handler) {
  284. serviceRpc("receive-pack", hr)
  285. }
  286. func serviceRpc(rpc string, hr handler) {
  287. w, r, dir := hr.w, hr.r, hr.Dir
  288. defer r.Body.Close()
  289. if !hasAccess(r, hr.Config, dir, rpc, true) {
  290. renderNoAccess(w)
  291. return
  292. }
  293. w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-result", rpc))
  294. var (
  295. reqBody = r.Body
  296. input []byte
  297. br io.Reader
  298. err error
  299. )
  300. // Handle GZIP.
  301. if r.Header.Get("Content-Encoding") == "gzip" {
  302. reqBody, err = gzip.NewReader(reqBody)
  303. if err != nil {
  304. log.GitLogger.Error(2, "fail to create gzip reader: %v", err)
  305. w.WriteHeader(http.StatusInternalServerError)
  306. return
  307. }
  308. }
  309. if hr.Config.OnSucceed != nil {
  310. input, err = ioutil.ReadAll(reqBody)
  311. if err != nil {
  312. log.GitLogger.Error(2, "fail to read request body: %v", err)
  313. w.WriteHeader(http.StatusInternalServerError)
  314. return
  315. }
  316. br = bytes.NewReader(input)
  317. } else {
  318. br = reqBody
  319. }
  320. args := []string{rpc, "--stateless-rpc", dir}
  321. cmd := exec.Command(hr.Config.GitBinPath, args...)
  322. cmd.Dir = dir
  323. cmd.Stdout = w
  324. cmd.Stdin = br
  325. if err := cmd.Run(); err != nil {
  326. log.GitLogger.Error(2, "fail to serve RPC(%s): %v", rpc, err)
  327. w.WriteHeader(http.StatusInternalServerError)
  328. return
  329. }
  330. if hr.Config.OnSucceed != nil {
  331. hr.Config.OnSucceed(rpc, input)
  332. }
  333. }
  334. func getInfoRefs(hr handler) {
  335. w, r, dir := hr.w, hr.r, hr.Dir
  336. serviceName := getServiceType(r)
  337. access := hasAccess(r, hr.Config, dir, serviceName, false)
  338. if access {
  339. args := []string{serviceName, "--stateless-rpc", "--advertise-refs", "."}
  340. refs := gitCommand(hr.Config.GitBinPath, dir, args...)
  341. hdrNocache(w)
  342. w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", serviceName))
  343. w.WriteHeader(http.StatusOK)
  344. w.Write(packetWrite("# service=git-" + serviceName + "\n"))
  345. w.Write(packetFlush())
  346. w.Write(refs)
  347. } else {
  348. updateServerInfo(hr.Config.GitBinPath, dir)
  349. hdrNocache(w)
  350. sendFile("text/plain; charset=utf-8", hr)
  351. }
  352. }
  353. func getInfoPacks(hr handler) {
  354. hdrCacheForever(hr.w)
  355. sendFile("text/plain; charset=utf-8", hr)
  356. }
  357. func getLooseObject(hr handler) {
  358. hdrCacheForever(hr.w)
  359. sendFile("application/x-git-loose-object", hr)
  360. }
  361. func getPackFile(hr handler) {
  362. hdrCacheForever(hr.w)
  363. sendFile("application/x-git-packed-objects", hr)
  364. }
  365. func getIdxFile(hr handler) {
  366. hdrCacheForever(hr.w)
  367. sendFile("application/x-git-packed-objects-toc", hr)
  368. }
  369. func getTextFile(hr handler) {
  370. hdrNocache(hr.w)
  371. sendFile("text/plain", hr)
  372. }
  373. // Logic helping functions
  374. func sendFile(contentType string, hr handler) {
  375. w, r := hr.w, hr.r
  376. reqFile := path.Join(hr.Dir, hr.File)
  377. // fmt.Println("sendFile:", reqFile)
  378. f, err := os.Stat(reqFile)
  379. if os.IsNotExist(err) {
  380. renderNotFound(w)
  381. return
  382. }
  383. w.Header().Set("Content-Type", contentType)
  384. w.Header().Set("Content-Length", fmt.Sprintf("%d", f.Size()))
  385. w.Header().Set("Last-Modified", f.ModTime().Format(http.TimeFormat))
  386. http.ServeFile(w, r, reqFile)
  387. }
  388. func getServiceType(r *http.Request) string {
  389. serviceType := r.FormValue("service")
  390. if s := strings.HasPrefix(serviceType, "git-"); !s {
  391. return ""
  392. }
  393. return strings.Replace(serviceType, "git-", "", 1)
  394. }
  395. func hasAccess(r *http.Request, config *Config, dir string, rpc string, checkContentType bool) bool {
  396. if checkContentType {
  397. if r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", rpc) {
  398. return false
  399. }
  400. }
  401. if !(rpc == "upload-pack" || rpc == "receive-pack") {
  402. return false
  403. }
  404. if rpc == "receive-pack" {
  405. return config.ReceivePack
  406. }
  407. if rpc == "upload-pack" {
  408. return config.UploadPack
  409. }
  410. return getConfigSetting(config.GitBinPath, rpc, dir)
  411. }
  412. func getConfigSetting(gitBinPath, serviceName string, dir string) bool {
  413. serviceName = strings.Replace(serviceName, "-", "", -1)
  414. setting := getGitConfig(gitBinPath, "http."+serviceName, dir)
  415. if serviceName == "uploadpack" {
  416. return setting != "false"
  417. }
  418. return setting == "true"
  419. }
  420. func getGitConfig(gitBinPath, configName string, dir string) string {
  421. args := []string{"config", configName}
  422. out := string(gitCommand(gitBinPath, dir, args...))
  423. return out[0 : len(out)-1]
  424. }
  425. func updateServerInfo(gitBinPath, dir string) []byte {
  426. args := []string{"update-server-info"}
  427. return gitCommand(gitBinPath, dir, args...)
  428. }
  429. // FIXME: use process module
  430. func gitCommand(gitBinPath, dir string, args ...string) []byte {
  431. command := exec.Command(gitBinPath, args...)
  432. command.Dir = dir
  433. out, err := command.Output()
  434. if err != nil {
  435. log.GitLogger.Error(4, err.Error())
  436. }
  437. return out
  438. }
  439. // HTTP error response handling functions
  440. func renderMethodNotAllowed(w http.ResponseWriter, r *http.Request) {
  441. if r.Proto == "HTTP/1.1" {
  442. w.WriteHeader(http.StatusMethodNotAllowed)
  443. w.Write([]byte("Method Not Allowed"))
  444. } else {
  445. w.WriteHeader(http.StatusBadRequest)
  446. w.Write([]byte("Bad Request"))
  447. }
  448. }
  449. func renderNotFound(w http.ResponseWriter) {
  450. w.WriteHeader(http.StatusNotFound)
  451. w.Write([]byte("Not Found"))
  452. }
  453. func renderNoAccess(w http.ResponseWriter) {
  454. w.WriteHeader(http.StatusForbidden)
  455. w.Write([]byte("Forbidden"))
  456. }
  457. // Packet-line handling function
  458. func packetFlush() []byte {
  459. return []byte("0000")
  460. }
  461. func packetWrite(str string) []byte {
  462. s := strconv.FormatInt(int64(len(str)+4), 16)
  463. if len(s)%4 != 0 {
  464. s = strings.Repeat("0", 4-len(s)%4) + s
  465. }
  466. return []byte(s + str)
  467. }
  468. // Header writing functions
  469. func hdrNocache(w http.ResponseWriter) {
  470. w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
  471. w.Header().Set("Pragma", "no-cache")
  472. w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
  473. }
  474. func hdrCacheForever(w http.ResponseWriter) {
  475. now := time.Now().Unix()
  476. expires := now + 31536000
  477. w.Header().Set("Date", fmt.Sprintf("%d", now))
  478. w.Header().Set("Expires", fmt.Sprintf("%d", expires))
  479. w.Header().Set("Cache-Control", "public, max-age=31536000")
  480. }