mirror of
https://github.com/go-gitea/gitea.git
synced 2024-11-04 08:17:24 -05:00
35cc5b0402
* remove GetRepositoryByRef and add GetRepositoryByOwnerAndName * fix tests * fix tests bug * some improvements
571 lines
14 KiB
Go
571 lines
14 KiB
Go
package lfs
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"path"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/models"
|
|
"code.gitea.io/gitea/modules/context"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"github.com/dgrijalva/jwt-go"
|
|
"gopkg.in/macaron.v1"
|
|
)
|
|
|
|
const (
|
|
contentMediaType = "application/vnd.git-lfs"
|
|
metaMediaType = contentMediaType + "+json"
|
|
)
|
|
|
|
// RequestVars contain variables from the HTTP request. Variables from routing, json body decoding, and
|
|
// some headers are stored.
|
|
type RequestVars struct {
|
|
Oid string
|
|
Size int64
|
|
User string
|
|
Password string
|
|
Repo string
|
|
Authorization string
|
|
}
|
|
|
|
// BatchVars contains multiple RequestVars processed in one batch operation.
|
|
// https://github.com/git-lfs/git-lfs/blob/master/docs/api/batch.md
|
|
type BatchVars struct {
|
|
Transfers []string `json:"transfers,omitempty"`
|
|
Operation string `json:"operation"`
|
|
Objects []*RequestVars `json:"objects"`
|
|
}
|
|
|
|
// BatchResponse contains multiple object metadata Representation structures
|
|
// for use with the batch API.
|
|
type BatchResponse struct {
|
|
Transfer string `json:"transfer,omitempty"`
|
|
Objects []*Representation `json:"objects"`
|
|
}
|
|
|
|
// Representation is object metadata as seen by clients of the lfs server.
|
|
type Representation struct {
|
|
Oid string `json:"oid"`
|
|
Size int64 `json:"size"`
|
|
Actions map[string]*link `json:"actions"`
|
|
Error *ObjectError `json:"error,omitempty"`
|
|
}
|
|
|
|
// ObjectError defines the JSON structure returned to the client in case of an error
|
|
type ObjectError struct {
|
|
Code int `json:"code"`
|
|
Message string `json:"message"`
|
|
}
|
|
|
|
// ObjectLink builds a URL linking to the object.
|
|
func (v *RequestVars) ObjectLink() string {
|
|
return setting.AppURL + path.Join(v.User, v.Repo, "info/lfs/objects", v.Oid)
|
|
}
|
|
|
|
// VerifyLink builds a URL for verifying the object.
|
|
func (v *RequestVars) VerifyLink() string {
|
|
return setting.AppURL + path.Join(v.User, v.Repo, "info/lfs/verify")
|
|
}
|
|
|
|
// link provides a structure used to build a hypermedia representation of an HTTP link.
|
|
type link struct {
|
|
Href string `json:"href"`
|
|
Header map[string]string `json:"header,omitempty"`
|
|
ExpiresAt time.Time `json:"expires_at,omitempty"`
|
|
}
|
|
|
|
// ObjectOidHandler is the main request routing entry point into LFS server functions
|
|
func ObjectOidHandler(ctx *context.Context) {
|
|
|
|
if !setting.LFS.StartServer {
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
if ctx.Req.Method == "GET" || ctx.Req.Method == "HEAD" {
|
|
if MetaMatcher(ctx.Req) {
|
|
getMetaHandler(ctx)
|
|
return
|
|
}
|
|
if ContentMatcher(ctx.Req) || len(ctx.Params("filename")) > 0 {
|
|
getContentHandler(ctx)
|
|
return
|
|
}
|
|
} else if ctx.Req.Method == "PUT" && ContentMatcher(ctx.Req) {
|
|
PutHandler(ctx)
|
|
return
|
|
}
|
|
|
|
}
|
|
|
|
func getAuthenticatedRepoAndMeta(ctx *context.Context, rv *RequestVars, requireWrite bool) (*models.LFSMetaObject, *models.Repository) {
|
|
repository, err := models.GetRepositoryByOwnerAndName(rv.User, rv.Repo)
|
|
if err != nil {
|
|
log.Debug("Could not find repository: %s/%s - %s", rv.User, rv.Repo, err)
|
|
writeStatus(ctx, 404)
|
|
return nil, nil
|
|
}
|
|
|
|
if !authenticate(ctx, repository, rv.Authorization, requireWrite) {
|
|
requireAuth(ctx)
|
|
return nil, nil
|
|
}
|
|
|
|
meta, err := repository.GetLFSMetaObjectByOid(rv.Oid)
|
|
if err != nil {
|
|
writeStatus(ctx, 404)
|
|
return nil, nil
|
|
}
|
|
|
|
return meta, repository
|
|
}
|
|
|
|
// getContentHandler gets the content from the content store
|
|
func getContentHandler(ctx *context.Context) {
|
|
rv := unpack(ctx)
|
|
|
|
meta, _ := getAuthenticatedRepoAndMeta(ctx, rv, false)
|
|
if meta == nil {
|
|
return
|
|
}
|
|
|
|
// Support resume download using Range header
|
|
var fromByte int64
|
|
statusCode := 200
|
|
if rangeHdr := ctx.Req.Header.Get("Range"); rangeHdr != "" {
|
|
regex := regexp.MustCompile(`bytes=(\d+)\-.*`)
|
|
match := regex.FindStringSubmatch(rangeHdr)
|
|
if match != nil && len(match) > 1 {
|
|
statusCode = 206
|
|
fromByte, _ = strconv.ParseInt(match[1], 10, 32)
|
|
ctx.Resp.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", fromByte, meta.Size-1, meta.Size-fromByte))
|
|
}
|
|
}
|
|
|
|
contentStore := &ContentStore{BasePath: setting.LFS.ContentPath}
|
|
content, err := contentStore.Get(meta, fromByte)
|
|
if err != nil {
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
ctx.Resp.Header().Set("Content-Length", strconv.FormatInt(meta.Size-fromByte, 10))
|
|
ctx.Resp.Header().Set("Content-Type", "application/octet-stream")
|
|
|
|
filename := ctx.Params("filename")
|
|
if len(filename) > 0 {
|
|
decodedFilename, err := base64.RawURLEncoding.DecodeString(filename)
|
|
if err == nil {
|
|
ctx.Resp.Header().Set("Content-Disposition", "attachment; filename=\""+string(decodedFilename)+"\"")
|
|
}
|
|
}
|
|
|
|
ctx.Resp.WriteHeader(statusCode)
|
|
io.Copy(ctx.Resp, content)
|
|
content.Close()
|
|
logRequest(ctx.Req, statusCode)
|
|
}
|
|
|
|
// getMetaHandler retrieves metadata about the object
|
|
func getMetaHandler(ctx *context.Context) {
|
|
rv := unpack(ctx)
|
|
|
|
meta, _ := getAuthenticatedRepoAndMeta(ctx, rv, false)
|
|
if meta == nil {
|
|
return
|
|
}
|
|
|
|
ctx.Resp.Header().Set("Content-Type", metaMediaType)
|
|
|
|
if ctx.Req.Method == "GET" {
|
|
enc := json.NewEncoder(ctx.Resp)
|
|
enc.Encode(Represent(rv, meta, true, false))
|
|
}
|
|
|
|
logRequest(ctx.Req, 200)
|
|
}
|
|
|
|
// PostHandler instructs the client how to upload data
|
|
func PostHandler(ctx *context.Context) {
|
|
if !setting.LFS.StartServer {
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
if !MetaMatcher(ctx.Req) {
|
|
writeStatus(ctx, 400)
|
|
return
|
|
}
|
|
|
|
rv := unpack(ctx)
|
|
|
|
repository, err := models.GetRepositoryByOwnerAndName(rv.User, rv.Repo)
|
|
if err != nil {
|
|
log.Debug("Could not find repository: %s/%s - %s", rv.User, rv.Repo, err)
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
if !authenticate(ctx, repository, rv.Authorization, true) {
|
|
requireAuth(ctx)
|
|
}
|
|
|
|
meta, err := models.NewLFSMetaObject(&models.LFSMetaObject{Oid: rv.Oid, Size: rv.Size, RepositoryID: repository.ID})
|
|
if err != nil {
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
ctx.Resp.Header().Set("Content-Type", metaMediaType)
|
|
|
|
sentStatus := 202
|
|
contentStore := &ContentStore{BasePath: setting.LFS.ContentPath}
|
|
if meta.Existing && contentStore.Exists(meta) {
|
|
sentStatus = 200
|
|
}
|
|
ctx.Resp.WriteHeader(sentStatus)
|
|
|
|
enc := json.NewEncoder(ctx.Resp)
|
|
enc.Encode(Represent(rv, meta, meta.Existing, true))
|
|
logRequest(ctx.Req, sentStatus)
|
|
}
|
|
|
|
// BatchHandler provides the batch api
|
|
func BatchHandler(ctx *context.Context) {
|
|
|
|
if !setting.LFS.StartServer {
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
if !MetaMatcher(ctx.Req) {
|
|
writeStatus(ctx, 400)
|
|
return
|
|
}
|
|
|
|
bv := unpackbatch(ctx)
|
|
|
|
var responseObjects []*Representation
|
|
|
|
// Create a response object
|
|
for _, object := range bv.Objects {
|
|
repository, err := models.GetRepositoryByOwnerAndName(object.User, object.Repo)
|
|
|
|
if err != nil {
|
|
log.Debug("Could not find repository: %s/%s - %s", object.User, object.Repo, err)
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
requireWrite := false
|
|
if bv.Operation == "upload" {
|
|
requireWrite = true
|
|
}
|
|
|
|
if !authenticate(ctx, repository, object.Authorization, requireWrite) {
|
|
requireAuth(ctx)
|
|
return
|
|
}
|
|
|
|
contentStore := &ContentStore{BasePath: setting.LFS.ContentPath}
|
|
|
|
meta, err := repository.GetLFSMetaObjectByOid(object.Oid)
|
|
if err == nil && contentStore.Exists(meta) { // Object is found and exists
|
|
responseObjects = append(responseObjects, Represent(object, meta, true, false))
|
|
continue
|
|
}
|
|
|
|
// Object is not found
|
|
meta, err = models.NewLFSMetaObject(&models.LFSMetaObject{Oid: object.Oid, Size: object.Size, RepositoryID: repository.ID})
|
|
if err == nil {
|
|
responseObjects = append(responseObjects, Represent(object, meta, meta.Existing, !contentStore.Exists(meta)))
|
|
}
|
|
}
|
|
|
|
ctx.Resp.Header().Set("Content-Type", metaMediaType)
|
|
|
|
respobj := &BatchResponse{Objects: responseObjects}
|
|
|
|
enc := json.NewEncoder(ctx.Resp)
|
|
enc.Encode(respobj)
|
|
logRequest(ctx.Req, 200)
|
|
}
|
|
|
|
// PutHandler receives data from the client and puts it into the content store
|
|
func PutHandler(ctx *context.Context) {
|
|
rv := unpack(ctx)
|
|
|
|
meta, repository := getAuthenticatedRepoAndMeta(ctx, rv, true)
|
|
if meta == nil {
|
|
return
|
|
}
|
|
|
|
contentStore := &ContentStore{BasePath: setting.LFS.ContentPath}
|
|
if err := contentStore.Put(meta, ctx.Req.Body().ReadCloser()); err != nil {
|
|
ctx.Resp.WriteHeader(500)
|
|
fmt.Fprintf(ctx.Resp, `{"message":"%s"}`, err)
|
|
if err = repository.RemoveLFSMetaObjectByOid(rv.Oid); err != nil {
|
|
log.Error(4, "RemoveLFSMetaObjectByOid: %v", err)
|
|
}
|
|
return
|
|
}
|
|
|
|
logRequest(ctx.Req, 200)
|
|
}
|
|
|
|
// VerifyHandler verify oid and its size from the content store
|
|
func VerifyHandler(ctx *context.Context) {
|
|
if !setting.LFS.StartServer {
|
|
writeStatus(ctx, 404)
|
|
return
|
|
}
|
|
|
|
if !ContentMatcher(ctx.Req) {
|
|
writeStatus(ctx, 400)
|
|
return
|
|
}
|
|
|
|
rv := unpack(ctx)
|
|
|
|
meta, _ := getAuthenticatedRepoAndMeta(ctx, rv, true)
|
|
if meta == nil {
|
|
return
|
|
}
|
|
|
|
contentStore := &ContentStore{BasePath: setting.LFS.ContentPath}
|
|
ok, err := contentStore.Verify(meta)
|
|
if err != nil {
|
|
ctx.Resp.WriteHeader(500)
|
|
fmt.Fprintf(ctx.Resp, `{"message":"%s"}`, err)
|
|
return
|
|
}
|
|
if !ok {
|
|
writeStatus(ctx, 422)
|
|
return
|
|
}
|
|
|
|
logRequest(ctx.Req, 200)
|
|
}
|
|
|
|
// Represent takes a RequestVars and Meta and turns it into a Representation suitable
|
|
// for json encoding
|
|
func Represent(rv *RequestVars, meta *models.LFSMetaObject, download, upload bool) *Representation {
|
|
rep := &Representation{
|
|
Oid: meta.Oid,
|
|
Size: meta.Size,
|
|
Actions: make(map[string]*link),
|
|
}
|
|
|
|
header := make(map[string]string)
|
|
header["Accept"] = contentMediaType
|
|
|
|
if rv.Authorization == "" {
|
|
//https://github.com/github/git-lfs/issues/1088
|
|
header["Authorization"] = "Authorization: Basic dummy"
|
|
} else {
|
|
header["Authorization"] = rv.Authorization
|
|
}
|
|
|
|
if download {
|
|
rep.Actions["download"] = &link{Href: rv.ObjectLink(), Header: header}
|
|
}
|
|
|
|
if upload {
|
|
rep.Actions["upload"] = &link{Href: rv.ObjectLink(), Header: header}
|
|
}
|
|
|
|
if upload && !download {
|
|
// Force client side verify action while gitea lacks proper server side verification
|
|
rep.Actions["verify"] = &link{Href: rv.VerifyLink(), Header: header}
|
|
}
|
|
|
|
return rep
|
|
}
|
|
|
|
// ContentMatcher provides a mux.MatcherFunc that only allows requests that contain
|
|
// an Accept header with the contentMediaType
|
|
func ContentMatcher(r macaron.Request) bool {
|
|
mediaParts := strings.Split(r.Header.Get("Accept"), ";")
|
|
mt := mediaParts[0]
|
|
return mt == contentMediaType
|
|
}
|
|
|
|
// MetaMatcher provides a mux.MatcherFunc that only allows requests that contain
|
|
// an Accept header with the metaMediaType
|
|
func MetaMatcher(r macaron.Request) bool {
|
|
mediaParts := strings.Split(r.Header.Get("Accept"), ";")
|
|
mt := mediaParts[0]
|
|
return mt == metaMediaType
|
|
}
|
|
|
|
func unpack(ctx *context.Context) *RequestVars {
|
|
r := ctx.Req
|
|
rv := &RequestVars{
|
|
User: ctx.Params("username"),
|
|
Repo: strings.TrimSuffix(ctx.Params("reponame"), ".git"),
|
|
Oid: ctx.Params("oid"),
|
|
Authorization: r.Header.Get("Authorization"),
|
|
}
|
|
|
|
if r.Method == "POST" { // Maybe also check if +json
|
|
var p RequestVars
|
|
dec := json.NewDecoder(r.Body().ReadCloser())
|
|
err := dec.Decode(&p)
|
|
if err != nil {
|
|
return rv
|
|
}
|
|
|
|
rv.Oid = p.Oid
|
|
rv.Size = p.Size
|
|
}
|
|
|
|
return rv
|
|
}
|
|
|
|
// TODO cheap hack, unify with unpack
|
|
func unpackbatch(ctx *context.Context) *BatchVars {
|
|
|
|
r := ctx.Req
|
|
var bv BatchVars
|
|
|
|
dec := json.NewDecoder(r.Body().ReadCloser())
|
|
err := dec.Decode(&bv)
|
|
if err != nil {
|
|
return &bv
|
|
}
|
|
|
|
for i := 0; i < len(bv.Objects); i++ {
|
|
bv.Objects[i].User = ctx.Params("username")
|
|
bv.Objects[i].Repo = strings.TrimSuffix(ctx.Params("reponame"), ".git")
|
|
bv.Objects[i].Authorization = r.Header.Get("Authorization")
|
|
}
|
|
|
|
return &bv
|
|
}
|
|
|
|
func writeStatus(ctx *context.Context, status int) {
|
|
message := http.StatusText(status)
|
|
|
|
mediaParts := strings.Split(ctx.Req.Header.Get("Accept"), ";")
|
|
mt := mediaParts[0]
|
|
if strings.HasSuffix(mt, "+json") {
|
|
message = `{"message":"` + message + `"}`
|
|
}
|
|
|
|
ctx.Resp.WriteHeader(status)
|
|
fmt.Fprint(ctx.Resp, message)
|
|
logRequest(ctx.Req, status)
|
|
}
|
|
|
|
func logRequest(r macaron.Request, status int) {
|
|
log.Debug("LFS request - Method: %s, URL: %s, Status %d", r.Method, r.URL, status)
|
|
}
|
|
|
|
// authenticate uses the authorization string to determine whether
|
|
// or not to proceed. This server assumes an HTTP Basic auth format.
|
|
func authenticate(ctx *context.Context, repository *models.Repository, authorization string, requireWrite bool) bool {
|
|
|
|
accessMode := models.AccessModeRead
|
|
if requireWrite {
|
|
accessMode = models.AccessModeWrite
|
|
}
|
|
|
|
if !repository.IsPrivate && !requireWrite {
|
|
return true
|
|
}
|
|
|
|
if ctx.IsSigned {
|
|
accessCheck, _ := models.HasAccess(ctx.User.ID, repository, accessMode)
|
|
return accessCheck
|
|
}
|
|
|
|
if authorization == "" {
|
|
return false
|
|
}
|
|
|
|
if authenticateToken(repository, authorization, requireWrite) {
|
|
return true
|
|
}
|
|
|
|
if !strings.HasPrefix(authorization, "Basic ") {
|
|
return false
|
|
}
|
|
|
|
c, err := base64.StdEncoding.DecodeString(strings.TrimPrefix(authorization, "Basic "))
|
|
if err != nil {
|
|
return false
|
|
}
|
|
cs := string(c)
|
|
i := strings.IndexByte(cs, ':')
|
|
if i < 0 {
|
|
return false
|
|
}
|
|
user, password := cs[:i], cs[i+1:]
|
|
|
|
userModel, err := models.GetUserByName(user)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
if !userModel.ValidatePassword(password) {
|
|
return false
|
|
}
|
|
|
|
accessCheck, _ := models.HasAccess(userModel.ID, repository, accessMode)
|
|
return accessCheck
|
|
}
|
|
|
|
func authenticateToken(repository *models.Repository, authorization string, requireWrite bool) bool {
|
|
if !strings.HasPrefix(authorization, "Bearer ") {
|
|
return false
|
|
}
|
|
|
|
token, err := jwt.Parse(authorization[7:], func(t *jwt.Token) (interface{}, error) {
|
|
if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
|
|
return nil, fmt.Errorf("unexpected signing method: %v", t.Header["alg"])
|
|
}
|
|
return setting.LFS.JWTSecretBytes, nil
|
|
})
|
|
if err != nil {
|
|
return false
|
|
}
|
|
claims, claimsOk := token.Claims.(jwt.MapClaims)
|
|
if !token.Valid || !claimsOk {
|
|
return false
|
|
}
|
|
|
|
opStr, ok := claims["op"].(string)
|
|
if !ok {
|
|
return false
|
|
}
|
|
|
|
if requireWrite && opStr != "upload" {
|
|
return false
|
|
}
|
|
|
|
repoID, ok := claims["repo"].(float64)
|
|
if !ok {
|
|
return false
|
|
}
|
|
|
|
if repository.ID != int64(repoID) {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func requireAuth(ctx *context.Context) {
|
|
ctx.Resp.Header().Set("WWW-Authenticate", "Basic realm=gitea-lfs")
|
|
writeStatus(ctx, 401)
|
|
}
|