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.HandleText(401, "no basic auth and digit auth")
  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 || !has {
  138. ctx.HandleText(401, "no basic auth and digit auth")
  139. return
  140. }
  141. } else {
  142. ctx.HandleText(401, "no basic auth and digit auth")
  143. return
  144. }
  145. }
  146. if !isPull && repo.IsMirror {
  147. ctx.HandleText(401, "mirror repository is read-only")
  148. return
  149. }
  150. }
  151. }
  152. callback := func(rpc string, input []byte) {
  153. if rpc != "receive-pack" || isWiki {
  154. return
  155. }
  156. var lastLine int64 = 0
  157. for {
  158. head := input[lastLine : lastLine+2]
  159. if head[0] == '0' && head[1] == '0' {
  160. size, err := strconv.ParseInt(string(input[lastLine+2:lastLine+4]), 16, 32)
  161. if err != nil {
  162. log.Error(4, "%v", err)
  163. return
  164. }
  165. if size == 0 {
  166. //fmt.Println(string(input[lastLine:]))
  167. break
  168. }
  169. line := input[lastLine : lastLine+size]
  170. idx := bytes.IndexRune(line, '\000')
  171. if idx > -1 {
  172. line = line[:idx]
  173. }
  174. fields := strings.Fields(string(line))
  175. if len(fields) >= 3 {
  176. oldCommitId := fields[0][4:]
  177. newCommitId := fields[1]
  178. refName := fields[2]
  179. // FIXME: handle error.
  180. if err = models.Update(refName, oldCommitId, newCommitId, authUsername, username, reponame, authUser.Id); err == nil {
  181. go models.HookQueue.Add(repo.ID)
  182. go models.AddTestPullRequestTask(repo.ID, strings.TrimPrefix(refName, "refs/heads/"))
  183. }
  184. }
  185. lastLine = lastLine + size
  186. } else {
  187. break
  188. }
  189. }
  190. }
  191. HTTPBackend(&Config{
  192. RepoRootPath: setting.RepoRootPath,
  193. GitBinPath: "git",
  194. UploadPack: true,
  195. ReceivePack: true,
  196. OnSucceed: callback,
  197. })(ctx.Resp, ctx.Req.Request)
  198. runtime.GC()
  199. }
  200. type Config struct {
  201. RepoRootPath string
  202. GitBinPath string
  203. UploadPack bool
  204. ReceivePack bool
  205. OnSucceed func(rpc string, input []byte)
  206. }
  207. type handler struct {
  208. *Config
  209. w http.ResponseWriter
  210. r *http.Request
  211. Dir string
  212. File string
  213. }
  214. type route struct {
  215. cr *regexp.Regexp
  216. method string
  217. handler func(handler)
  218. }
  219. var routes = []route{
  220. {regexp.MustCompile("(.*?)/git-upload-pack$"), "POST", serviceUploadPack},
  221. {regexp.MustCompile("(.*?)/git-receive-pack$"), "POST", serviceReceivePack},
  222. {regexp.MustCompile("(.*?)/info/refs$"), "GET", getInfoRefs},
  223. {regexp.MustCompile("(.*?)/HEAD$"), "GET", getTextFile},
  224. {regexp.MustCompile("(.*?)/objects/info/alternates$"), "GET", getTextFile},
  225. {regexp.MustCompile("(.*?)/objects/info/http-alternates$"), "GET", getTextFile},
  226. {regexp.MustCompile("(.*?)/objects/info/packs$"), "GET", getInfoPacks},
  227. {regexp.MustCompile("(.*?)/objects/info/[^/]*$"), "GET", getTextFile},
  228. {regexp.MustCompile("(.*?)/objects/[0-9a-f]{2}/[0-9a-f]{38}$"), "GET", getLooseObject},
  229. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.pack$"), "GET", getPackFile},
  230. {regexp.MustCompile("(.*?)/objects/pack/pack-[0-9a-f]{40}\\.idx$"), "GET", getIdxFile},
  231. }
  232. func getGitDir(config *Config, fPath string) (string, error) {
  233. root := config.RepoRootPath
  234. if len(root) == 0 {
  235. cwd, err := os.Getwd()
  236. if err != nil {
  237. log.GitLogger.Error(4, err.Error())
  238. return "", err
  239. }
  240. root = cwd
  241. }
  242. if !strings.HasSuffix(fPath, ".git") {
  243. fPath = fPath + ".git"
  244. }
  245. f := filepath.Join(root, fPath)
  246. if _, err := os.Stat(f); os.IsNotExist(err) {
  247. return "", err
  248. }
  249. return f, nil
  250. }
  251. // Request handling function
  252. func HTTPBackend(config *Config) http.HandlerFunc {
  253. return func(w http.ResponseWriter, r *http.Request) {
  254. for _, route := range routes {
  255. r.URL.Path = strings.ToLower(r.URL.Path) // blue: In case some repo name has upper case name
  256. if m := route.cr.FindStringSubmatch(r.URL.Path); m != nil {
  257. if route.method != r.Method {
  258. renderMethodNotAllowed(w, r)
  259. return
  260. }
  261. file := strings.Replace(r.URL.Path, m[1]+"/", "", 1)
  262. dir, err := getGitDir(config, m[1])
  263. if err != nil {
  264. log.GitLogger.Error(4, err.Error())
  265. renderNotFound(w)
  266. return
  267. }
  268. route.handler(handler{config, w, r, dir, file})
  269. return
  270. }
  271. }
  272. renderNotFound(w)
  273. return
  274. }
  275. }
  276. // Actual command handling functions
  277. func serviceUploadPack(hr handler) {
  278. serviceRpc("upload-pack", hr)
  279. }
  280. func serviceReceivePack(hr handler) {
  281. serviceRpc("receive-pack", hr)
  282. }
  283. func serviceRpc(rpc string, hr handler) {
  284. w, r, dir := hr.w, hr.r, hr.Dir
  285. defer r.Body.Close()
  286. if !hasAccess(r, hr.Config, dir, rpc, true) {
  287. renderNoAccess(w)
  288. return
  289. }
  290. w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-result", rpc))
  291. var (
  292. reqBody = r.Body
  293. input []byte
  294. br io.Reader
  295. err error
  296. )
  297. // Handle GZIP.
  298. if r.Header.Get("Content-Encoding") == "gzip" {
  299. reqBody, err = gzip.NewReader(reqBody)
  300. if err != nil {
  301. log.GitLogger.Error(2, "fail to create gzip reader: %v", err)
  302. w.WriteHeader(http.StatusInternalServerError)
  303. return
  304. }
  305. }
  306. if hr.Config.OnSucceed != nil {
  307. input, err = ioutil.ReadAll(reqBody)
  308. if err != nil {
  309. log.GitLogger.Error(2, "fail to read request body: %v", err)
  310. w.WriteHeader(http.StatusInternalServerError)
  311. return
  312. }
  313. br = bytes.NewReader(input)
  314. } else {
  315. br = reqBody
  316. }
  317. args := []string{rpc, "--stateless-rpc", dir}
  318. cmd := exec.Command(hr.Config.GitBinPath, args...)
  319. cmd.Dir = dir
  320. cmd.Stdout = w
  321. cmd.Stdin = br
  322. if err := cmd.Run(); err != nil {
  323. log.GitLogger.Error(2, "fail to serve RPC(%s): %v", rpc, err)
  324. w.WriteHeader(http.StatusInternalServerError)
  325. return
  326. }
  327. if hr.Config.OnSucceed != nil {
  328. hr.Config.OnSucceed(rpc, input)
  329. }
  330. }
  331. func getInfoRefs(hr handler) {
  332. w, r, dir := hr.w, hr.r, hr.Dir
  333. serviceName := getServiceType(r)
  334. access := hasAccess(r, hr.Config, dir, serviceName, false)
  335. if access {
  336. args := []string{serviceName, "--stateless-rpc", "--advertise-refs", "."}
  337. refs := gitCommand(hr.Config.GitBinPath, dir, args...)
  338. hdrNocache(w)
  339. w.Header().Set("Content-Type", fmt.Sprintf("application/x-git-%s-advertisement", serviceName))
  340. w.WriteHeader(http.StatusOK)
  341. w.Write(packetWrite("# service=git-" + serviceName + "\n"))
  342. w.Write(packetFlush())
  343. w.Write(refs)
  344. } else {
  345. updateServerInfo(hr.Config.GitBinPath, dir)
  346. hdrNocache(w)
  347. sendFile("text/plain; charset=utf-8", hr)
  348. }
  349. }
  350. func getInfoPacks(hr handler) {
  351. hdrCacheForever(hr.w)
  352. sendFile("text/plain; charset=utf-8", hr)
  353. }
  354. func getLooseObject(hr handler) {
  355. hdrCacheForever(hr.w)
  356. sendFile("application/x-git-loose-object", hr)
  357. }
  358. func getPackFile(hr handler) {
  359. hdrCacheForever(hr.w)
  360. sendFile("application/x-git-packed-objects", hr)
  361. }
  362. func getIdxFile(hr handler) {
  363. hdrCacheForever(hr.w)
  364. sendFile("application/x-git-packed-objects-toc", hr)
  365. }
  366. func getTextFile(hr handler) {
  367. hdrNocache(hr.w)
  368. sendFile("text/plain", hr)
  369. }
  370. // Logic helping functions
  371. func sendFile(contentType string, hr handler) {
  372. w, r := hr.w, hr.r
  373. reqFile := path.Join(hr.Dir, hr.File)
  374. // fmt.Println("sendFile:", reqFile)
  375. f, err := os.Stat(reqFile)
  376. if os.IsNotExist(err) {
  377. renderNotFound(w)
  378. return
  379. }
  380. w.Header().Set("Content-Type", contentType)
  381. w.Header().Set("Content-Length", fmt.Sprintf("%d", f.Size()))
  382. w.Header().Set("Last-Modified", f.ModTime().Format(http.TimeFormat))
  383. http.ServeFile(w, r, reqFile)
  384. }
  385. func getServiceType(r *http.Request) string {
  386. serviceType := r.FormValue("service")
  387. if s := strings.HasPrefix(serviceType, "git-"); !s {
  388. return ""
  389. }
  390. return strings.Replace(serviceType, "git-", "", 1)
  391. }
  392. func hasAccess(r *http.Request, config *Config, dir string, rpc string, checkContentType bool) bool {
  393. if checkContentType {
  394. if r.Header.Get("Content-Type") != fmt.Sprintf("application/x-git-%s-request", rpc) {
  395. return false
  396. }
  397. }
  398. if !(rpc == "upload-pack" || rpc == "receive-pack") {
  399. return false
  400. }
  401. if rpc == "receive-pack" {
  402. return config.ReceivePack
  403. }
  404. if rpc == "upload-pack" {
  405. return config.UploadPack
  406. }
  407. return getConfigSetting(config.GitBinPath, rpc, dir)
  408. }
  409. func getConfigSetting(gitBinPath, serviceName string, dir string) bool {
  410. serviceName = strings.Replace(serviceName, "-", "", -1)
  411. setting := getGitConfig(gitBinPath, "http."+serviceName, dir)
  412. if serviceName == "uploadpack" {
  413. return setting != "false"
  414. }
  415. return setting == "true"
  416. }
  417. func getGitConfig(gitBinPath, configName string, dir string) string {
  418. args := []string{"config", configName}
  419. out := string(gitCommand(gitBinPath, dir, args...))
  420. return out[0 : len(out)-1]
  421. }
  422. func updateServerInfo(gitBinPath, dir string) []byte {
  423. args := []string{"update-server-info"}
  424. return gitCommand(gitBinPath, dir, args...)
  425. }
  426. func gitCommand(gitBinPath, dir string, args ...string) []byte {
  427. command := exec.Command(gitBinPath, args...)
  428. command.Dir = dir
  429. out, err := command.Output()
  430. if err != nil {
  431. log.GitLogger.Error(4, err.Error())
  432. }
  433. return out
  434. }
  435. // HTTP error response handling functions
  436. func renderMethodNotAllowed(w http.ResponseWriter, r *http.Request) {
  437. if r.Proto == "HTTP/1.1" {
  438. w.WriteHeader(http.StatusMethodNotAllowed)
  439. w.Write([]byte("Method Not Allowed"))
  440. } else {
  441. w.WriteHeader(http.StatusBadRequest)
  442. w.Write([]byte("Bad Request"))
  443. }
  444. }
  445. func renderNotFound(w http.ResponseWriter) {
  446. w.WriteHeader(http.StatusNotFound)
  447. w.Write([]byte("Not Found"))
  448. }
  449. func renderNoAccess(w http.ResponseWriter) {
  450. w.WriteHeader(http.StatusForbidden)
  451. w.Write([]byte("Forbidden"))
  452. }
  453. // Packet-line handling function
  454. func packetFlush() []byte {
  455. return []byte("0000")
  456. }
  457. func packetWrite(str string) []byte {
  458. s := strconv.FormatInt(int64(len(str)+4), 16)
  459. if len(s)%4 != 0 {
  460. s = strings.Repeat("0", 4-len(s)%4) + s
  461. }
  462. return []byte(s + str)
  463. }
  464. // Header writing functions
  465. func hdrNocache(w http.ResponseWriter) {
  466. w.Header().Set("Expires", "Fri, 01 Jan 1980 00:00:00 GMT")
  467. w.Header().Set("Pragma", "no-cache")
  468. w.Header().Set("Cache-Control", "no-cache, max-age=0, must-revalidate")
  469. }
  470. func hdrCacheForever(w http.ResponseWriter) {
  471. now := time.Now().Unix()
  472. expires := now + 31536000
  473. w.Header().Set("Date", fmt.Sprintf("%d", now))
  474. w.Header().Set("Expires", fmt.Sprintf("%d", expires))
  475. w.Header().Set("Cache-Control", "public, max-age=31536000")
  476. }