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-rw-r--r--modules/lfs/LICENSE20
-rw-r--r--modules/lfs/client.go32
-rw-r--r--modules/lfs/client_test.go21
-rw-r--r--modules/lfs/content_store.go163
-rw-r--r--modules/lfs/endpoint.go107
-rw-r--r--modules/lfs/endpoint_test.go74
-rw-r--r--modules/lfs/filesystem_client.go88
-rw-r--r--modules/lfs/http_client.go259
-rw-r--r--modules/lfs/http_client_test.go377
-rw-r--r--modules/lfs/pointer.go129
-rw-r--r--modules/lfs/pointer_scanner.go109
-rw-r--r--modules/lfs/pointer_test.go103
-rw-r--r--modules/lfs/shared.go115
-rw-r--r--modules/lfs/transferadapter.go89
-rw-r--r--modules/lfs/transferadapter_test.go172
15 files changed, 1858 insertions, 0 deletions
diff --git a/modules/lfs/LICENSE b/modules/lfs/LICENSE
new file mode 100644
index 0000000..0a94a80
--- /dev/null
+++ b/modules/lfs/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2016 The Gitea Authors
+Copyright (c) GitHub, Inc. and LFS Test Server contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/modules/lfs/client.go b/modules/lfs/client.go
new file mode 100644
index 0000000..f810e5c
--- /dev/null
+++ b/modules/lfs/client.go
@@ -0,0 +1,32 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "context"
+ "io"
+ "net/http"
+ "net/url"
+)
+
+// DownloadCallback gets called for every requested LFS object to process its content
+type DownloadCallback func(p Pointer, content io.ReadCloser, objectError error) error
+
+// UploadCallback gets called for every requested LFS object to provide its content
+type UploadCallback func(p Pointer, objectError error) (io.ReadCloser, error)
+
+// Client is used to communicate with a LFS source
+type Client interface {
+ BatchSize() int
+ Download(ctx context.Context, objects []Pointer, callback DownloadCallback) error
+ Upload(ctx context.Context, objects []Pointer, callback UploadCallback) error
+}
+
+// NewClient creates a LFS client
+func NewClient(endpoint *url.URL, httpTransport *http.Transport) Client {
+ if endpoint.Scheme == "file" {
+ return newFilesystemClient(endpoint)
+ }
+ return newHTTPClient(endpoint, httpTransport)
+}
diff --git a/modules/lfs/client_test.go b/modules/lfs/client_test.go
new file mode 100644
index 0000000..a136930
--- /dev/null
+++ b/modules/lfs/client_test.go
@@ -0,0 +1,21 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "net/url"
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+)
+
+func TestNewClient(t *testing.T) {
+ u, _ := url.Parse("file:///test")
+ c := NewClient(u, nil)
+ assert.IsType(t, &FilesystemClient{}, c)
+
+ u, _ = url.Parse("https://test.com/lfs")
+ c = NewClient(u, nil)
+ assert.IsType(t, &HTTPClient{}, c)
+}
diff --git a/modules/lfs/content_store.go b/modules/lfs/content_store.go
new file mode 100644
index 0000000..0d9c0c9
--- /dev/null
+++ b/modules/lfs/content_store.go
@@ -0,0 +1,163 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "crypto/sha256"
+ "encoding/hex"
+ "errors"
+ "hash"
+ "io"
+ "os"
+
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/storage"
+)
+
+var (
+ // ErrHashMismatch occurs if the content has does not match OID
+ ErrHashMismatch = errors.New("content hash does not match OID")
+ // ErrSizeMismatch occurs if the content size does not match
+ ErrSizeMismatch = errors.New("content size does not match")
+)
+
+// ContentStore provides a simple file system based storage.
+type ContentStore struct {
+ storage.ObjectStorage
+}
+
+// NewContentStore creates the default ContentStore
+func NewContentStore() *ContentStore {
+ contentStore := &ContentStore{ObjectStorage: storage.LFS}
+ return contentStore
+}
+
+// Get takes a Meta object and retrieves the content from the store, returning
+// it as an io.ReadSeekCloser.
+func (s *ContentStore) Get(pointer Pointer) (storage.Object, error) {
+ f, err := s.Open(pointer.RelativePath())
+ if err != nil {
+ log.Error("Whilst trying to read LFS OID[%s]: Unable to open Error: %v", pointer.Oid, err)
+ return nil, err
+ }
+ return f, err
+}
+
+// Put takes a Meta object and an io.Reader and writes the content to the store.
+func (s *ContentStore) Put(pointer Pointer, r io.Reader) error {
+ p := pointer.RelativePath()
+
+ // Wrap the provided reader with an inline hashing and size checker
+ wrappedRd := newHashingReader(pointer.Size, pointer.Oid, r)
+
+ // now pass the wrapped reader to Save - if there is a size mismatch or hash mismatch then
+ // the errors returned by the newHashingReader should percolate up to here
+ written, err := s.Save(p, wrappedRd, pointer.Size)
+ if err != nil {
+ log.Error("Whilst putting LFS OID[%s]: Failed to copy to tmpPath: %s Error: %v", pointer.Oid, p, err)
+ return err
+ }
+
+ // check again whether there is any error during the Save operation
+ // because some errors might be ignored by the Reader's caller
+ if wrappedRd.lastError != nil && !errors.Is(wrappedRd.lastError, io.EOF) {
+ err = wrappedRd.lastError
+ } else if written != pointer.Size {
+ err = ErrSizeMismatch
+ }
+
+ // if the upload failed, try to delete the file
+ if err != nil {
+ if errDel := s.Delete(p); errDel != nil {
+ log.Error("Cleaning the LFS OID[%s] failed: %v", pointer.Oid, errDel)
+ }
+ }
+
+ return err
+}
+
+// Exists returns true if the object exists in the content store.
+func (s *ContentStore) Exists(pointer Pointer) (bool, error) {
+ _, err := s.ObjectStorage.Stat(pointer.RelativePath())
+ if err != nil {
+ if os.IsNotExist(err) {
+ return false, nil
+ }
+ return false, err
+ }
+ return true, nil
+}
+
+// Verify returns true if the object exists in the content store and size is correct.
+func (s *ContentStore) Verify(pointer Pointer) (bool, error) {
+ p := pointer.RelativePath()
+ fi, err := s.ObjectStorage.Stat(p)
+ if os.IsNotExist(err) || (err == nil && fi.Size() != pointer.Size) {
+ return false, nil
+ } else if err != nil {
+ log.Error("Unable stat file: %s for LFS OID[%s] Error: %v", p, pointer.Oid, err)
+ return false, err
+ }
+
+ return true, nil
+}
+
+// ReadMetaObject will read a git_model.LFSMetaObject and return a reader
+func ReadMetaObject(pointer Pointer) (io.ReadSeekCloser, error) {
+ contentStore := NewContentStore()
+ return contentStore.Get(pointer)
+}
+
+type hashingReader struct {
+ internal io.Reader
+ currentSize int64
+ expectedSize int64
+ hash hash.Hash
+ expectedHash string
+ lastError error
+}
+
+// recordError records the last error during the Save operation
+// Some callers of the Reader doesn't respect the returned "err"
+// For example, MinIO's Put will ignore errors if the written size could equal to expected size
+// So we must remember the error by ourselves,
+// and later check again whether ErrSizeMismatch or ErrHashMismatch occurs during the Save operation
+func (r *hashingReader) recordError(err error) error {
+ r.lastError = err
+ return err
+}
+
+func (r *hashingReader) Read(b []byte) (int, error) {
+ n, err := r.internal.Read(b)
+
+ if n > 0 {
+ r.currentSize += int64(n)
+ wn, werr := r.hash.Write(b[:n])
+ if wn != n || werr != nil {
+ return n, r.recordError(werr)
+ }
+ }
+
+ if errors.Is(err, io.EOF) || r.currentSize >= r.expectedSize {
+ if r.currentSize != r.expectedSize {
+ return n, r.recordError(ErrSizeMismatch)
+ }
+
+ shaStr := hex.EncodeToString(r.hash.Sum(nil))
+ if shaStr != r.expectedHash {
+ return n, r.recordError(ErrHashMismatch)
+ }
+ }
+
+ return n, r.recordError(err)
+}
+
+func newHashingReader(expectedSize int64, expectedHash string, reader io.Reader) *hashingReader {
+ return &hashingReader{
+ internal: reader,
+ expectedSize: expectedSize,
+ expectedHash: expectedHash,
+ hash: sha256.New(),
+ }
+}
diff --git a/modules/lfs/endpoint.go b/modules/lfs/endpoint.go
new file mode 100644
index 0000000..97bd7d4
--- /dev/null
+++ b/modules/lfs/endpoint.go
@@ -0,0 +1,107 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "net/url"
+ "os"
+ "path"
+ "path/filepath"
+ "strings"
+
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/util"
+)
+
+// DetermineEndpoint determines an endpoint from the clone url or uses the specified LFS url.
+func DetermineEndpoint(cloneurl, lfsurl string) *url.URL {
+ if len(lfsurl) > 0 {
+ return endpointFromURL(lfsurl)
+ }
+ return endpointFromCloneURL(cloneurl)
+}
+
+func endpointFromCloneURL(rawurl string) *url.URL {
+ ep := endpointFromURL(rawurl)
+ if ep == nil {
+ return ep
+ }
+
+ ep.Path = strings.TrimSuffix(ep.Path, "/")
+
+ if ep.Scheme == "file" {
+ return ep
+ }
+
+ if path.Ext(ep.Path) == ".git" {
+ ep.Path += "/info/lfs"
+ } else {
+ ep.Path += ".git/info/lfs"
+ }
+
+ return ep
+}
+
+func endpointFromURL(rawurl string) *url.URL {
+ if strings.HasPrefix(rawurl, "/") {
+ return endpointFromLocalPath(rawurl)
+ }
+
+ u, err := url.Parse(rawurl)
+ if err != nil {
+ log.Error("lfs.endpointFromUrl: %v", err)
+ return nil
+ }
+
+ switch u.Scheme {
+ case "http", "https":
+ return u
+ case "git":
+ u.Scheme = "https"
+ return u
+ case "ssh":
+ u.Scheme = "https"
+ u.User = nil
+ return u
+ case "file":
+ return u
+ default:
+ if _, err := os.Stat(rawurl); err == nil {
+ return endpointFromLocalPath(rawurl)
+ }
+
+ log.Error("lfs.endpointFromUrl: unknown url")
+ return nil
+ }
+}
+
+func endpointFromLocalPath(path string) *url.URL {
+ var slash string
+ if abs, err := filepath.Abs(path); err == nil {
+ if !strings.HasPrefix(abs, "/") {
+ slash = "/"
+ }
+ path = abs
+ }
+
+ var gitpath string
+ if filepath.Base(path) == ".git" {
+ gitpath = path
+ path = filepath.Dir(path)
+ } else {
+ gitpath = filepath.Join(path, ".git")
+ }
+
+ if _, err := os.Stat(gitpath); err == nil {
+ path = gitpath
+ } else if _, err := os.Stat(path); err != nil {
+ return nil
+ }
+
+ path = "file://" + slash + util.PathEscapeSegments(filepath.ToSlash(path))
+
+ u, _ := url.Parse(path)
+
+ return u
+}
diff --git a/modules/lfs/endpoint_test.go b/modules/lfs/endpoint_test.go
new file mode 100644
index 0000000..118abe2
--- /dev/null
+++ b/modules/lfs/endpoint_test.go
@@ -0,0 +1,74 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "net/url"
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+)
+
+func str2url(raw string) *url.URL {
+ u, _ := url.Parse(raw)
+ return u
+}
+
+func TestDetermineEndpoint(t *testing.T) {
+ // Test cases
+ cases := []struct {
+ cloneurl string
+ lfsurl string
+ expected *url.URL
+ }{
+ // case 0
+ {
+ cloneurl: "",
+ lfsurl: "",
+ expected: nil,
+ },
+ // case 1
+ {
+ cloneurl: "https://git.com/repo",
+ lfsurl: "",
+ expected: str2url("https://git.com/repo.git/info/lfs"),
+ },
+ // case 2
+ {
+ cloneurl: "https://git.com/repo.git",
+ lfsurl: "",
+ expected: str2url("https://git.com/repo.git/info/lfs"),
+ },
+ // case 3
+ {
+ cloneurl: "",
+ lfsurl: "https://gitlfs.com/repo",
+ expected: str2url("https://gitlfs.com/repo"),
+ },
+ // case 4
+ {
+ cloneurl: "https://git.com/repo.git",
+ lfsurl: "https://gitlfs.com/repo",
+ expected: str2url("https://gitlfs.com/repo"),
+ },
+ // case 5
+ {
+ cloneurl: "git://git.com/repo.git",
+ lfsurl: "",
+ expected: str2url("https://git.com/repo.git/info/lfs"),
+ },
+ // case 6
+ {
+ cloneurl: "",
+ lfsurl: "git://gitlfs.com/repo",
+ expected: str2url("https://gitlfs.com/repo"),
+ },
+ }
+
+ for n, c := range cases {
+ ep := DetermineEndpoint(c.cloneurl, c.lfsurl)
+
+ assert.Equal(t, c.expected, ep, "case %d: error should match", n)
+ }
+}
diff --git a/modules/lfs/filesystem_client.go b/modules/lfs/filesystem_client.go
new file mode 100644
index 0000000..71bef5c
--- /dev/null
+++ b/modules/lfs/filesystem_client.go
@@ -0,0 +1,88 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "context"
+ "io"
+ "net/url"
+ "os"
+ "path/filepath"
+
+ "code.gitea.io/gitea/modules/util"
+)
+
+// FilesystemClient is used to read LFS data from a filesystem path
+type FilesystemClient struct {
+ lfsDir string
+}
+
+// BatchSize returns the preferred size of batchs to process
+func (c *FilesystemClient) BatchSize() int {
+ return 1
+}
+
+func newFilesystemClient(endpoint *url.URL) *FilesystemClient {
+ path, _ := util.FileURLToPath(endpoint)
+ lfsDir := filepath.Join(path, "lfs", "objects")
+ return &FilesystemClient{lfsDir}
+}
+
+func (c *FilesystemClient) objectPath(oid string) string {
+ return filepath.Join(c.lfsDir, oid[0:2], oid[2:4], oid)
+}
+
+// Download reads the specific LFS object from the target path
+func (c *FilesystemClient) Download(ctx context.Context, objects []Pointer, callback DownloadCallback) error {
+ for _, object := range objects {
+ p := Pointer{object.Oid, object.Size}
+
+ objectPath := c.objectPath(p.Oid)
+
+ f, err := os.Open(objectPath)
+ if err != nil {
+ return err
+ }
+ defer f.Close()
+ if err := callback(p, f, nil); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+// Upload writes the specific LFS object to the target path
+func (c *FilesystemClient) Upload(ctx context.Context, objects []Pointer, callback UploadCallback) error {
+ for _, object := range objects {
+ p := Pointer{object.Oid, object.Size}
+
+ objectPath := c.objectPath(p.Oid)
+
+ if err := os.MkdirAll(filepath.Dir(objectPath), os.ModePerm); err != nil {
+ return err
+ }
+
+ content, err := callback(p, nil)
+ if err != nil {
+ return err
+ }
+
+ err = func() error {
+ defer content.Close()
+
+ f, err := os.Create(objectPath)
+ if err != nil {
+ return err
+ }
+ defer f.Close()
+ _, err = io.Copy(f, content)
+
+ return err
+ }()
+ if err != nil {
+ return err
+ }
+ }
+ return nil
+}
diff --git a/modules/lfs/http_client.go b/modules/lfs/http_client.go
new file mode 100644
index 0000000..4859fe6
--- /dev/null
+++ b/modules/lfs/http_client.go
@@ -0,0 +1,259 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "bytes"
+ "context"
+ "errors"
+ "fmt"
+ "io"
+ "net/http"
+ "net/url"
+ "strings"
+
+ "code.gitea.io/gitea/modules/json"
+ "code.gitea.io/gitea/modules/log"
+ "code.gitea.io/gitea/modules/proxy"
+)
+
+const httpBatchSize = 20
+
+// HTTPClient is used to communicate with the LFS server
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md
+type HTTPClient struct {
+ client *http.Client
+ endpoint string
+ transfers map[string]TransferAdapter
+}
+
+// BatchSize returns the preferred size of batchs to process
+func (c *HTTPClient) BatchSize() int {
+ return httpBatchSize
+}
+
+func newHTTPClient(endpoint *url.URL, httpTransport *http.Transport) *HTTPClient {
+ if httpTransport == nil {
+ httpTransport = &http.Transport{
+ Proxy: proxy.Proxy(),
+ }
+ }
+
+ hc := &http.Client{
+ Transport: httpTransport,
+ }
+
+ basic := &BasicTransferAdapter{hc}
+ client := &HTTPClient{
+ client: hc,
+ endpoint: strings.TrimSuffix(endpoint.String(), "/"),
+ transfers: map[string]TransferAdapter{
+ basic.Name(): basic,
+ },
+ }
+
+ return client
+}
+
+func (c *HTTPClient) transferNames() []string {
+ keys := make([]string, len(c.transfers))
+ i := 0
+ for k := range c.transfers {
+ keys[i] = k
+ i++
+ }
+ return keys
+}
+
+func (c *HTTPClient) batch(ctx context.Context, operation string, objects []Pointer) (*BatchResponse, error) {
+ log.Trace("BATCH operation with objects: %v", objects)
+
+ url := fmt.Sprintf("%s/objects/batch", c.endpoint)
+
+ request := &BatchRequest{operation, c.transferNames(), nil, objects}
+ payload := new(bytes.Buffer)
+ err := json.NewEncoder(payload).Encode(request)
+ if err != nil {
+ log.Error("Error encoding json: %v", err)
+ return nil, err
+ }
+
+ req, err := createRequest(ctx, http.MethodPost, url, map[string]string{"Content-Type": MediaType}, payload)
+ if err != nil {
+ return nil, err
+ }
+
+ res, err := performRequest(ctx, c.client, req)
+ if err != nil {
+ return nil, err
+ }
+ defer res.Body.Close()
+
+ var response BatchResponse
+ err = json.NewDecoder(res.Body).Decode(&response)
+ if err != nil {
+ log.Error("Error decoding json: %v", err)
+ return nil, err
+ }
+
+ if len(response.Transfer) == 0 {
+ response.Transfer = "basic"
+ }
+
+ return &response, nil
+}
+
+// Download reads the specific LFS object from the LFS server
+func (c *HTTPClient) Download(ctx context.Context, objects []Pointer, callback DownloadCallback) error {
+ return c.performOperation(ctx, objects, callback, nil)
+}
+
+// Upload sends the specific LFS object to the LFS server
+func (c *HTTPClient) Upload(ctx context.Context, objects []Pointer, callback UploadCallback) error {
+ return c.performOperation(ctx, objects, nil, callback)
+}
+
+func (c *HTTPClient) performOperation(ctx context.Context, objects []Pointer, dc DownloadCallback, uc UploadCallback) error {
+ if len(objects) == 0 {
+ return nil
+ }
+
+ operation := "download"
+ if uc != nil {
+ operation = "upload"
+ }
+
+ result, err := c.batch(ctx, operation, objects)
+ if err != nil {
+ return err
+ }
+
+ transferAdapter, ok := c.transfers[result.Transfer]
+ if !ok {
+ return fmt.Errorf("TransferAdapter not found: %s", result.Transfer)
+ }
+
+ for _, object := range result.Objects {
+ if object.Error != nil {
+ log.Trace("Error on object %v: %v", object.Pointer, object.Error)
+ if uc != nil {
+ if _, err := uc(object.Pointer, object.Error); err != nil {
+ return err
+ }
+ } else {
+ if err := dc(object.Pointer, nil, object.Error); err != nil {
+ return err
+ }
+ }
+ continue
+ }
+
+ if uc != nil {
+ if len(object.Actions) == 0 {
+ log.Trace("%v already present on server", object.Pointer)
+ continue
+ }
+
+ link, ok := object.Actions["upload"]
+ if !ok {
+ log.Debug("%+v", object)
+ return errors.New("missing action 'upload'")
+ }
+
+ content, err := uc(object.Pointer, nil)
+ if err != nil {
+ return err
+ }
+
+ err = transferAdapter.Upload(ctx, link, object.Pointer, content)
+ if err != nil {
+ return err
+ }
+
+ link, ok = object.Actions["verify"]
+ if ok {
+ if err := transferAdapter.Verify(ctx, link, object.Pointer); err != nil {
+ return err
+ }
+ }
+ } else {
+ link, ok := object.Actions["download"]
+ if !ok {
+ // no actions block in response, try legacy response schema
+ link, ok = object.Links["download"]
+ }
+ if !ok {
+ log.Debug("%+v", object)
+ return errors.New("missing action 'download'")
+ }
+
+ content, err := transferAdapter.Download(ctx, link)
+ if err != nil {
+ return err
+ }
+
+ if err := dc(object.Pointer, content, nil); err != nil {
+ return err
+ }
+ }
+ }
+
+ return nil
+}
+
+// createRequest creates a new request, and sets the headers.
+func createRequest(ctx context.Context, method, url string, headers map[string]string, body io.Reader) (*http.Request, error) {
+ log.Trace("createRequest: %s", url)
+ req, err := http.NewRequestWithContext(ctx, method, url, body)
+ if err != nil {
+ log.Error("Error creating request: %v", err)
+ return nil, err
+ }
+
+ for key, value := range headers {
+ req.Header.Set(key, value)
+ }
+ req.Header.Set("Accept", AcceptHeader)
+
+ return req, nil
+}
+
+// performRequest sends a request, optionally performs a callback on the request and returns the response.
+// If the status code is 200, the response is returned, and it will contain a non-nil Body.
+// Otherwise, it will return an error, and the Body will be nil or closed.
+func performRequest(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+ log.Trace("performRequest: %s", req.URL)
+ res, err := client.Do(req)
+ if err != nil {
+ select {
+ case <-ctx.Done():
+ return res, ctx.Err()
+ default:
+ }
+ log.Error("Error while processing request: %v", err)
+ return res, err
+ }
+
+ if res.StatusCode != http.StatusOK {
+ defer res.Body.Close()
+ return res, handleErrorResponse(res)
+ }
+
+ return res, nil
+}
+
+func handleErrorResponse(resp *http.Response) error {
+ var er ErrorResponse
+ err := json.NewDecoder(resp.Body).Decode(&er)
+ if err != nil {
+ if err == io.EOF {
+ return io.ErrUnexpectedEOF
+ }
+ log.Error("Error decoding json: %v", err)
+ return err
+ }
+
+ log.Trace("ErrorResponse(%v): %v", resp.Status, er)
+ return errors.New(er.Message)
+}
diff --git a/modules/lfs/http_client_test.go b/modules/lfs/http_client_test.go
new file mode 100644
index 0000000..534a445
--- /dev/null
+++ b/modules/lfs/http_client_test.go
@@ -0,0 +1,377 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "bytes"
+ "context"
+ "io"
+ "net/http"
+ "strings"
+ "testing"
+
+ "code.gitea.io/gitea/modules/json"
+
+ "github.com/stretchr/testify/assert"
+ "github.com/stretchr/testify/require"
+)
+
+type RoundTripFunc func(req *http.Request) *http.Response
+
+func (f RoundTripFunc) RoundTrip(req *http.Request) (*http.Response, error) {
+ return f(req), nil
+}
+
+type DummyTransferAdapter struct{}
+
+func (a *DummyTransferAdapter) Name() string {
+ return "dummy"
+}
+
+func (a *DummyTransferAdapter) Download(ctx context.Context, l *Link) (io.ReadCloser, error) {
+ return io.NopCloser(bytes.NewBufferString("dummy")), nil
+}
+
+func (a *DummyTransferAdapter) Upload(ctx context.Context, l *Link, p Pointer, r io.Reader) error {
+ return nil
+}
+
+func (a *DummyTransferAdapter) Verify(ctx context.Context, l *Link, p Pointer) error {
+ return nil
+}
+
+func lfsTestRoundtripHandler(req *http.Request) *http.Response {
+ var batchResponse *BatchResponse
+ url := req.URL.String()
+
+ if strings.Contains(url, "status-not-ok") {
+ return &http.Response{StatusCode: http.StatusBadRequest}
+ } else if strings.Contains(url, "invalid-json-response") {
+ return &http.Response{StatusCode: http.StatusOK, Body: io.NopCloser(bytes.NewBufferString("invalid json"))}
+ } else if strings.Contains(url, "valid-batch-request-download") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{
+ "download": {},
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "legacy-batch-request-download") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Links: map[string]*Link{
+ "download": {},
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "valid-batch-request-upload") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{
+ "upload": {},
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "response-no-objects") {
+ batchResponse = &BatchResponse{Transfer: "dummy"}
+ } else if strings.Contains(url, "unknown-transfer-adapter") {
+ batchResponse = &BatchResponse{Transfer: "unknown_adapter"}
+ } else if strings.Contains(url, "error-in-response-objects") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Error: &ObjectError{
+ Code: http.StatusNotFound,
+ Message: "Object not found",
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "empty-actions-map") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{},
+ },
+ },
+ }
+ } else if strings.Contains(url, "download-actions-map") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{
+ "download": {},
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "upload-actions-map") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{
+ "upload": {},
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "verify-actions-map") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{
+ "verify": {},
+ },
+ },
+ },
+ }
+ } else if strings.Contains(url, "unknown-actions-map") {
+ batchResponse = &BatchResponse{
+ Transfer: "dummy",
+ Objects: []*ObjectResponse{
+ {
+ Actions: map[string]*Link{
+ "unknown": {},
+ },
+ },
+ },
+ }
+ } else {
+ return nil
+ }
+
+ payload := new(bytes.Buffer)
+ json.NewEncoder(payload).Encode(batchResponse)
+
+ return &http.Response{StatusCode: http.StatusOK, Body: io.NopCloser(payload)}
+}
+
+func TestHTTPClientDownload(t *testing.T) {
+ p := Pointer{Oid: "fb8f7d8435968c4f82a726a92395be4d16f2f63116caf36c8ad35c60831ab041", Size: 6}
+
+ hc := &http.Client{Transport: RoundTripFunc(func(req *http.Request) *http.Response {
+ assert.Equal(t, "POST", req.Method)
+ assert.Equal(t, MediaType, req.Header.Get("Content-type"))
+ assert.Equal(t, AcceptHeader, req.Header.Get("Accept"))
+
+ var batchRequest BatchRequest
+ err := json.NewDecoder(req.Body).Decode(&batchRequest)
+ require.NoError(t, err)
+
+ assert.Equal(t, "download", batchRequest.Operation)
+ assert.Len(t, batchRequest.Objects, 1)
+ assert.Equal(t, p.Oid, batchRequest.Objects[0].Oid)
+ assert.Equal(t, p.Size, batchRequest.Objects[0].Size)
+
+ return lfsTestRoundtripHandler(req)
+ })}
+ dummy := &DummyTransferAdapter{}
+
+ cases := []struct {
+ endpoint string
+ expectederror string
+ }{
+ // case 0
+ {
+ endpoint: "https://status-not-ok.io",
+ expectederror: io.ErrUnexpectedEOF.Error(),
+ },
+ // case 1
+ {
+ endpoint: "https://invalid-json-response.io",
+ expectederror: "invalid json",
+ },
+ // case 2
+ {
+ endpoint: "https://valid-batch-request-download.io",
+ expectederror: "",
+ },
+ // case 3
+ {
+ endpoint: "https://response-no-objects.io",
+ expectederror: "",
+ },
+ // case 4
+ {
+ endpoint: "https://unknown-transfer-adapter.io",
+ expectederror: "TransferAdapter not found: ",
+ },
+ // case 5
+ {
+ endpoint: "https://error-in-response-objects.io",
+ expectederror: "Object not found",
+ },
+ // case 6
+ {
+ endpoint: "https://empty-actions-map.io",
+ expectederror: "missing action 'download'",
+ },
+ // case 7
+ {
+ endpoint: "https://download-actions-map.io",
+ expectederror: "",
+ },
+ // case 8
+ {
+ endpoint: "https://upload-actions-map.io",
+ expectederror: "missing action 'download'",
+ },
+ // case 9
+ {
+ endpoint: "https://verify-actions-map.io",
+ expectederror: "missing action 'download'",
+ },
+ // case 10
+ {
+ endpoint: "https://unknown-actions-map.io",
+ expectederror: "missing action 'download'",
+ },
+ // case 11
+ {
+ endpoint: "https://legacy-batch-request-download.io",
+ expectederror: "",
+ },
+ }
+
+ for n, c := range cases {
+ client := &HTTPClient{
+ client: hc,
+ endpoint: c.endpoint,
+ transfers: map[string]TransferAdapter{
+ "dummy": dummy,
+ },
+ }
+
+ err := client.Download(context.Background(), []Pointer{p}, func(p Pointer, content io.ReadCloser, objectError error) error {
+ if objectError != nil {
+ return objectError
+ }
+ b, err := io.ReadAll(content)
+ require.NoError(t, err)
+ assert.Equal(t, []byte("dummy"), b)
+ return nil
+ })
+ if len(c.expectederror) > 0 {
+ assert.True(t, strings.Contains(err.Error(), c.expectederror), "case %d: '%s' should contain '%s'", n, err.Error(), c.expectederror)
+ } else {
+ require.NoError(t, err, "case %d", n)
+ }
+ }
+}
+
+func TestHTTPClientUpload(t *testing.T) {
+ p := Pointer{Oid: "fb8f7d8435968c4f82a726a92395be4d16f2f63116caf36c8ad35c60831ab041", Size: 6}
+
+ hc := &http.Client{Transport: RoundTripFunc(func(req *http.Request) *http.Response {
+ assert.Equal(t, "POST", req.Method)
+ assert.Equal(t, MediaType, req.Header.Get("Content-type"))
+ assert.Equal(t, AcceptHeader, req.Header.Get("Accept"))
+
+ var batchRequest BatchRequest
+ err := json.NewDecoder(req.Body).Decode(&batchRequest)
+ require.NoError(t, err)
+
+ assert.Equal(t, "upload", batchRequest.Operation)
+ assert.Len(t, batchRequest.Objects, 1)
+ assert.Equal(t, p.Oid, batchRequest.Objects[0].Oid)
+ assert.Equal(t, p.Size, batchRequest.Objects[0].Size)
+
+ return lfsTestRoundtripHandler(req)
+ })}
+ dummy := &DummyTransferAdapter{}
+
+ cases := []struct {
+ endpoint string
+ expectederror string
+ }{
+ // case 0
+ {
+ endpoint: "https://status-not-ok.io",
+ expectederror: io.ErrUnexpectedEOF.Error(),
+ },
+ // case 1
+ {
+ endpoint: "https://invalid-json-response.io",
+ expectederror: "invalid json",
+ },
+ // case 2
+ {
+ endpoint: "https://valid-batch-request-upload.io",
+ expectederror: "",
+ },
+ // case 3
+ {
+ endpoint: "https://response-no-objects.io",
+ expectederror: "",
+ },
+ // case 4
+ {
+ endpoint: "https://unknown-transfer-adapter.io",
+ expectederror: "TransferAdapter not found: ",
+ },
+ // case 5
+ {
+ endpoint: "https://error-in-response-objects.io",
+ expectederror: "Object not found",
+ },
+ // case 6
+ {
+ endpoint: "https://empty-actions-map.io",
+ expectederror: "",
+ },
+ // case 7
+ {
+ endpoint: "https://download-actions-map.io",
+ expectederror: "missing action 'upload'",
+ },
+ // case 8
+ {
+ endpoint: "https://upload-actions-map.io",
+ expectederror: "",
+ },
+ // case 9
+ {
+ endpoint: "https://verify-actions-map.io",
+ expectederror: "missing action 'upload'",
+ },
+ // case 10
+ {
+ endpoint: "https://unknown-actions-map.io",
+ expectederror: "missing action 'upload'",
+ },
+ }
+
+ for n, c := range cases {
+ client := &HTTPClient{
+ client: hc,
+ endpoint: c.endpoint,
+ transfers: map[string]TransferAdapter{
+ "dummy": dummy,
+ },
+ }
+
+ err := client.Upload(context.Background(), []Pointer{p}, func(p Pointer, objectError error) (io.ReadCloser, error) {
+ return io.NopCloser(new(bytes.Buffer)), objectError
+ })
+ if len(c.expectederror) > 0 {
+ assert.True(t, strings.Contains(err.Error(), c.expectederror), "case %d: '%s' should contain '%s'", n, err.Error(), c.expectederror)
+ } else {
+ require.NoError(t, err, "case %d", n)
+ }
+ }
+}
diff --git a/modules/lfs/pointer.go b/modules/lfs/pointer.go
new file mode 100644
index 0000000..ebde20f
--- /dev/null
+++ b/modules/lfs/pointer.go
@@ -0,0 +1,129 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "crypto/sha256"
+ "encoding/hex"
+ "errors"
+ "fmt"
+ "io"
+ "path"
+ "regexp"
+ "strconv"
+ "strings"
+)
+
+const (
+ blobSizeCutoff = 1024
+
+ // MetaFileIdentifier is the string appearing at the first line of LFS pointer files.
+ // https://github.com/git-lfs/git-lfs/blob/master/docs/spec.md
+ MetaFileIdentifier = "version https://git-lfs.github.com/spec/v1"
+
+ // MetaFileOidPrefix appears in LFS pointer files on a line before the sha256 hash.
+ MetaFileOidPrefix = "oid sha256:"
+)
+
+var (
+ // ErrMissingPrefix occurs if the content lacks the LFS prefix
+ ErrMissingPrefix = errors.New("content lacks the LFS prefix")
+
+ // ErrInvalidStructure occurs if the content has an invalid structure
+ ErrInvalidStructure = errors.New("content has an invalid structure")
+
+ // ErrInvalidOIDFormat occurs if the oid has an invalid format
+ ErrInvalidOIDFormat = errors.New("OID has an invalid format")
+)
+
+// ReadPointer tries to read LFS pointer data from the reader
+func ReadPointer(reader io.Reader) (Pointer, error) {
+ buf := make([]byte, blobSizeCutoff)
+ n, err := io.ReadFull(reader, buf)
+ if err != nil && err != io.ErrUnexpectedEOF {
+ return Pointer{}, err
+ }
+ buf = buf[:n]
+
+ return ReadPointerFromBuffer(buf)
+}
+
+var oidPattern = regexp.MustCompile(`^[a-f\d]{64}$`)
+
+// ReadPointerFromBuffer will return a pointer if the provided byte slice is a pointer file or an error otherwise.
+func ReadPointerFromBuffer(buf []byte) (Pointer, error) {
+ var p Pointer
+
+ headString := string(buf)
+ if !strings.HasPrefix(headString, MetaFileIdentifier) {
+ return p, ErrMissingPrefix
+ }
+
+ splitLines := strings.Split(headString, "\n")
+ if len(splitLines) < 3 {
+ return p, ErrInvalidStructure
+ }
+
+ oid := strings.TrimPrefix(splitLines[1], MetaFileOidPrefix)
+ if len(oid) != 64 || !oidPattern.MatchString(oid) {
+ return p, ErrInvalidOIDFormat
+ }
+ size, err := strconv.ParseInt(strings.TrimPrefix(splitLines[2], "size "), 10, 64)
+ if err != nil {
+ return p, err
+ }
+
+ p.Oid = oid
+ p.Size = size
+
+ return p, nil
+}
+
+// IsValid checks if the pointer has a valid structure.
+// It doesn't check if the pointed-to-content exists.
+func (p Pointer) IsValid() bool {
+ if len(p.Oid) != 64 {
+ return false
+ }
+ if !oidPattern.MatchString(p.Oid) {
+ return false
+ }
+ if p.Size < 0 {
+ return false
+ }
+ return true
+}
+
+// StringContent returns the string representation of the pointer
+// https://github.com/git-lfs/git-lfs/blob/main/docs/spec.md#the-pointer
+func (p Pointer) StringContent() string {
+ return fmt.Sprintf("%s\n%s%s\nsize %d\n", MetaFileIdentifier, MetaFileOidPrefix, p.Oid, p.Size)
+}
+
+// RelativePath returns the relative storage path of the pointer
+func (p Pointer) RelativePath() string {
+ if len(p.Oid) < 5 {
+ return p.Oid
+ }
+
+ return path.Join(p.Oid[0:2], p.Oid[2:4], p.Oid[4:])
+}
+
+func (p Pointer) LogString() string {
+ if p.Oid == "" && p.Size == 0 {
+ return "<LFSPointer empty>"
+ }
+ return fmt.Sprintf("<LFSPointer %s:%d>", p.Oid, p.Size)
+}
+
+// GeneratePointer generates a pointer for arbitrary content
+func GeneratePointer(content io.Reader) (Pointer, error) {
+ h := sha256.New()
+ c, err := io.Copy(h, content)
+ if err != nil {
+ return Pointer{}, err
+ }
+ sum := h.Sum(nil)
+ return Pointer{Oid: hex.EncodeToString(sum), Size: c}, nil
+}
diff --git a/modules/lfs/pointer_scanner.go b/modules/lfs/pointer_scanner.go
new file mode 100644
index 0000000..8bbf7a8
--- /dev/null
+++ b/modules/lfs/pointer_scanner.go
@@ -0,0 +1,109 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "bufio"
+ "context"
+ "io"
+ "strconv"
+ "strings"
+ "sync"
+
+ "code.gitea.io/gitea/modules/git"
+ "code.gitea.io/gitea/modules/git/pipeline"
+)
+
+// SearchPointerBlobs scans the whole repository for LFS pointer files
+func SearchPointerBlobs(ctx context.Context, repo *git.Repository, pointerChan chan<- PointerBlob, errChan chan<- error) {
+ basePath := repo.Path
+
+ catFileCheckReader, catFileCheckWriter := io.Pipe()
+ shasToBatchReader, shasToBatchWriter := io.Pipe()
+ catFileBatchReader, catFileBatchWriter := io.Pipe()
+
+ wg := sync.WaitGroup{}
+ wg.Add(4)
+
+ // Create the go-routines in reverse order.
+
+ // 4. Take the output of cat-file --batch and check if each file in turn
+ // to see if they're pointers to files in the LFS store
+ go createPointerResultsFromCatFileBatch(ctx, catFileBatchReader, &wg, pointerChan)
+
+ // 3. Take the shas of the blobs and batch read them
+ go pipeline.CatFileBatch(ctx, shasToBatchReader, catFileBatchWriter, &wg, basePath)
+
+ // 2. From the provided objects restrict to blobs <=1k
+ go pipeline.BlobsLessThan1024FromCatFileBatchCheck(catFileCheckReader, shasToBatchWriter, &wg)
+
+ // 1. Run batch-check on all objects in the repository
+ if git.CheckGitVersionAtLeast("2.6.0") != nil {
+ revListReader, revListWriter := io.Pipe()
+ shasToCheckReader, shasToCheckWriter := io.Pipe()
+ wg.Add(2)
+ go pipeline.CatFileBatchCheck(ctx, shasToCheckReader, catFileCheckWriter, &wg, basePath)
+ go pipeline.BlobsFromRevListObjects(revListReader, shasToCheckWriter, &wg)
+ go pipeline.RevListAllObjects(ctx, revListWriter, &wg, basePath, errChan)
+ } else {
+ go pipeline.CatFileBatchCheckAllObjects(ctx, catFileCheckWriter, &wg, basePath, errChan)
+ }
+ wg.Wait()
+
+ close(pointerChan)
+ close(errChan)
+}
+
+func createPointerResultsFromCatFileBatch(ctx context.Context, catFileBatchReader *io.PipeReader, wg *sync.WaitGroup, pointerChan chan<- PointerBlob) {
+ defer wg.Done()
+ defer catFileBatchReader.Close()
+
+ bufferedReader := bufio.NewReader(catFileBatchReader)
+ buf := make([]byte, 1025)
+
+loop:
+ for {
+ select {
+ case <-ctx.Done():
+ break loop
+ default:
+ }
+
+ // File descriptor line: sha
+ sha, err := bufferedReader.ReadString(' ')
+ if err != nil {
+ _ = catFileBatchReader.CloseWithError(err)
+ break
+ }
+ sha = strings.TrimSpace(sha)
+ // Throw away the blob
+ if _, err := bufferedReader.ReadString(' '); err != nil {
+ _ = catFileBatchReader.CloseWithError(err)
+ break
+ }
+ sizeStr, err := bufferedReader.ReadString('\n')
+ if err != nil {
+ _ = catFileBatchReader.CloseWithError(err)
+ break
+ }
+ size, err := strconv.Atoi(sizeStr[:len(sizeStr)-1])
+ if err != nil {
+ _ = catFileBatchReader.CloseWithError(err)
+ break
+ }
+ pointerBuf := buf[:size+1]
+ if _, err := io.ReadFull(bufferedReader, pointerBuf); err != nil {
+ _ = catFileBatchReader.CloseWithError(err)
+ break
+ }
+ pointerBuf = pointerBuf[:size]
+ // Now we need to check if the pointerBuf is an LFS pointer
+ pointer, _ := ReadPointerFromBuffer(pointerBuf)
+ if !pointer.IsValid() {
+ continue
+ }
+
+ pointerChan <- PointerBlob{Hash: sha, Pointer: pointer}
+ }
+}
diff --git a/modules/lfs/pointer_test.go b/modules/lfs/pointer_test.go
new file mode 100644
index 0000000..9299a8a
--- /dev/null
+++ b/modules/lfs/pointer_test.go
@@ -0,0 +1,103 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "path"
+ "strings"
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+ "github.com/stretchr/testify/require"
+)
+
+func TestStringContent(t *testing.T) {
+ p := Pointer{Oid: "4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393", Size: 1234}
+ expected := "version https://git-lfs.github.com/spec/v1\noid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\nsize 1234\n"
+ assert.Equal(t, expected, p.StringContent())
+}
+
+func TestRelativePath(t *testing.T) {
+ p := Pointer{Oid: "4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393"}
+ expected := path.Join("4d", "7a", "214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393")
+ assert.Equal(t, expected, p.RelativePath())
+
+ p2 := Pointer{Oid: "4d7a"}
+ assert.Equal(t, "4d7a", p2.RelativePath())
+}
+
+func TestIsValid(t *testing.T) {
+ p := Pointer{}
+ assert.False(t, p.IsValid())
+
+ p = Pointer{Oid: "123"}
+ assert.False(t, p.IsValid())
+
+ p = Pointer{Oid: "z4cb57646c54a297c9807697e80a30946f79a4b82cb079d2606847825b1812cc"}
+ assert.False(t, p.IsValid())
+
+ p = Pointer{Oid: "94cb57646c54a297c9807697e80a30946f79a4b82cb079d2606847825b1812cc"}
+ assert.True(t, p.IsValid())
+
+ p = Pointer{Oid: "94cb57646c54a297c9807697e80a30946f79a4b82cb079d2606847825b1812cc", Size: -1}
+ assert.False(t, p.IsValid())
+}
+
+func TestGeneratePointer(t *testing.T) {
+ p, err := GeneratePointer(strings.NewReader("Gitea"))
+ require.NoError(t, err)
+ assert.True(t, p.IsValid())
+ assert.Equal(t, "94cb57646c54a297c9807697e80a30946f79a4b82cb079d2606847825b1812cc", p.Oid)
+ assert.Equal(t, int64(5), p.Size)
+}
+
+func TestReadPointerFromBuffer(t *testing.T) {
+ p, err := ReadPointerFromBuffer([]byte{})
+ require.ErrorIs(t, err, ErrMissingPrefix)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("test"))
+ require.ErrorIs(t, err, ErrMissingPrefix)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\n"))
+ require.ErrorIs(t, err, ErrInvalidStructure)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a\nsize 1234\n"))
+ require.ErrorIs(t, err, ErrInvalidOIDFormat)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a2146z4ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\nsize 1234\n"))
+ require.ErrorIs(t, err, ErrInvalidOIDFormat)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\ntest 1234\n"))
+ require.Error(t, err)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\nsize test\n"))
+ require.Error(t, err)
+ assert.False(t, p.IsValid())
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\nsize 1234\n"))
+ require.NoError(t, err)
+ assert.True(t, p.IsValid())
+ assert.Equal(t, "4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393", p.Oid)
+ assert.Equal(t, int64(1234), p.Size)
+
+ p, err = ReadPointerFromBuffer([]byte("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\nsize 1234\ntest"))
+ require.NoError(t, err)
+ assert.True(t, p.IsValid())
+ assert.Equal(t, "4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393", p.Oid)
+ assert.Equal(t, int64(1234), p.Size)
+}
+
+func TestReadPointer(t *testing.T) {
+ p, err := ReadPointer(strings.NewReader("version https://git-lfs.github.com/spec/v1\noid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393\nsize 1234\n"))
+ require.NoError(t, err)
+ assert.True(t, p.IsValid())
+ assert.Equal(t, "4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1258daaa5e2ca24d17e2393", p.Oid)
+ assert.Equal(t, int64(1234), p.Size)
+}
diff --git a/modules/lfs/shared.go b/modules/lfs/shared.go
new file mode 100644
index 0000000..a4326b5
--- /dev/null
+++ b/modules/lfs/shared.go
@@ -0,0 +1,115 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "errors"
+ "fmt"
+ "time"
+
+ "code.gitea.io/gitea/modules/util"
+)
+
+const (
+ // MediaType contains the media type for LFS server requests
+ MediaType = "application/vnd.git-lfs+json"
+ // Some LFS servers offer content with other types, so fallback to '*/*' if application/vnd.git-lfs+json cannot be served
+ AcceptHeader = "application/vnd.git-lfs+json;q=0.9, */*;q=0.8"
+)
+
+// BatchRequest contains multiple requests processed in one batch operation.
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#requests
+type BatchRequest struct {
+ Operation string `json:"operation"`
+ Transfers []string `json:"transfers,omitempty"`
+ Ref *Reference `json:"ref,omitempty"`
+ Objects []Pointer `json:"objects"`
+}
+
+// Reference contains a git reference.
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#ref-property
+type Reference struct {
+ Name string `json:"name"`
+}
+
+// Pointer contains LFS pointer data
+type Pointer struct {
+ Oid string `json:"oid" xorm:"UNIQUE(s) INDEX NOT NULL"`
+ Size int64 `json:"size" xorm:"NOT NULL"`
+}
+
+// BatchResponse contains multiple object metadata Representation structures
+// for use with the batch API.
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#successful-responses
+type BatchResponse struct {
+ Transfer string `json:"transfer,omitempty"`
+ Objects []*ObjectResponse `json:"objects"`
+}
+
+// ObjectResponse is object metadata as seen by clients of the LFS server.
+type ObjectResponse struct {
+ Pointer
+ Actions map[string]*Link `json:"actions,omitempty"`
+ Links map[string]*Link `json:"_links,omitempty"`
+ Error *ObjectError `json:"error,omitempty"`
+}
+
+// Link provides a structure with information about how to access a object.
+type Link struct {
+ Href string `json:"href"`
+ Header map[string]string `json:"header,omitempty"`
+ ExpiresAt *time.Time `json:"expires_at,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"`
+}
+
+var (
+ // See https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#successful-responses
+ // LFS object error codes should match HTTP status codes where possible:
+ // 404 - The object does not exist on the server.
+ // 409 - The specified hash algorithm disagrees with the server's acceptable options.
+ // 410 - The object was removed by the owner.
+ // 422 - Validation error.
+
+ ErrObjectNotExist = util.ErrNotExist // the object does not exist on the server
+ ErrObjectHashMismatch = errors.New("the specified hash algorithm disagrees with the server's acceptable options")
+ ErrObjectRemoved = errors.New("the object was removed by the owner")
+ ErrObjectValidation = errors.New("validation error")
+)
+
+func (e *ObjectError) Error() string {
+ return fmt.Sprintf("[%d] %s", e.Code, e.Message)
+}
+
+func (e *ObjectError) Unwrap() error {
+ switch e.Code {
+ case 404:
+ return ErrObjectNotExist
+ case 409:
+ return ErrObjectHashMismatch
+ case 410:
+ return ErrObjectRemoved
+ case 422:
+ return ErrObjectValidation
+ default:
+ return errors.New(e.Message)
+ }
+}
+
+// PointerBlob associates a Git blob with a Pointer.
+type PointerBlob struct {
+ Hash string
+ Pointer
+}
+
+// ErrorResponse describes the error to the client.
+type ErrorResponse struct {
+ Message string
+ DocumentationURL string `json:"documentation_url,omitempty"`
+ RequestID string `json:"request_id,omitempty"`
+}
diff --git a/modules/lfs/transferadapter.go b/modules/lfs/transferadapter.go
new file mode 100644
index 0000000..fbc3a3a
--- /dev/null
+++ b/modules/lfs/transferadapter.go
@@ -0,0 +1,89 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "bytes"
+ "context"
+ "io"
+ "net/http"
+
+ "code.gitea.io/gitea/modules/json"
+ "code.gitea.io/gitea/modules/log"
+)
+
+// TransferAdapter represents an adapter for downloading/uploading LFS objects.
+type TransferAdapter interface {
+ Name() string
+ Download(ctx context.Context, l *Link) (io.ReadCloser, error)
+ Upload(ctx context.Context, l *Link, p Pointer, r io.Reader) error
+ Verify(ctx context.Context, l *Link, p Pointer) error
+}
+
+// BasicTransferAdapter implements the "basic" adapter.
+type BasicTransferAdapter struct {
+ client *http.Client
+}
+
+// Name returns the name of the adapter.
+func (a *BasicTransferAdapter) Name() string {
+ return "basic"
+}
+
+// Download reads the download location and downloads the data.
+func (a *BasicTransferAdapter) Download(ctx context.Context, l *Link) (io.ReadCloser, error) {
+ req, err := createRequest(ctx, http.MethodGet, l.Href, l.Header, nil)
+ if err != nil {
+ return nil, err
+ }
+ log.Debug("Download Request: %+v", req)
+ resp, err := performRequest(ctx, a.client, req)
+ if err != nil {
+ return nil, err
+ }
+ return resp.Body, nil
+}
+
+// Upload sends the content to the LFS server.
+func (a *BasicTransferAdapter) Upload(ctx context.Context, l *Link, p Pointer, r io.Reader) error {
+ req, err := createRequest(ctx, http.MethodPut, l.Href, l.Header, r)
+ if err != nil {
+ return err
+ }
+ if req.Header.Get("Content-Type") == "" {
+ req.Header.Set("Content-Type", "application/octet-stream")
+ }
+ if req.Header.Get("Transfer-Encoding") == "chunked" {
+ req.TransferEncoding = []string{"chunked"}
+ }
+ req.ContentLength = p.Size
+
+ res, err := performRequest(ctx, a.client, req)
+ if err != nil {
+ return err
+ }
+ defer res.Body.Close()
+ return nil
+}
+
+// Verify calls the verify handler on the LFS server
+func (a *BasicTransferAdapter) Verify(ctx context.Context, l *Link, p Pointer) error {
+ b, err := json.Marshal(p)
+ if err != nil {
+ log.Error("Error encoding json: %v", err)
+ return err
+ }
+
+ req, err := createRequest(ctx, http.MethodPost, l.Href, l.Header, bytes.NewReader(b))
+ if err != nil {
+ return err
+ }
+ req.Header.Set("Content-Type", MediaType)
+ res, err := performRequest(ctx, a.client, req)
+ if err != nil {
+ return err
+ }
+ defer res.Body.Close()
+ return nil
+}
diff --git a/modules/lfs/transferadapter_test.go b/modules/lfs/transferadapter_test.go
new file mode 100644
index 0000000..0766e4a
--- /dev/null
+++ b/modules/lfs/transferadapter_test.go
@@ -0,0 +1,172 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package lfs
+
+import (
+ "bytes"
+ "context"
+ "io"
+ "net/http"
+ "strings"
+ "testing"
+
+ "code.gitea.io/gitea/modules/json"
+
+ "github.com/stretchr/testify/assert"
+ "github.com/stretchr/testify/require"
+)
+
+func TestBasicTransferAdapterName(t *testing.T) {
+ a := &BasicTransferAdapter{}
+
+ assert.Equal(t, "basic", a.Name())
+}
+
+func TestBasicTransferAdapter(t *testing.T) {
+ p := Pointer{Oid: "b5a2c96250612366ea272ffac6d9744aaf4b45aacd96aa7cfcb931ee3b558259", Size: 5}
+
+ roundTripHandler := func(req *http.Request) *http.Response {
+ assert.Equal(t, AcceptHeader, req.Header.Get("Accept"))
+ assert.Equal(t, "test-value", req.Header.Get("test-header"))
+
+ url := req.URL.String()
+ if strings.Contains(url, "download-request") {
+ assert.Equal(t, "GET", req.Method)
+
+ return &http.Response{StatusCode: http.StatusOK, Body: io.NopCloser(bytes.NewBufferString("dummy"))}
+ } else if strings.Contains(url, "upload-request") {
+ assert.Equal(t, "PUT", req.Method)
+ assert.Equal(t, "application/octet-stream", req.Header.Get("Content-Type"))
+
+ b, err := io.ReadAll(req.Body)
+ require.NoError(t, err)
+ assert.Equal(t, "dummy", string(b))
+
+ return &http.Response{StatusCode: http.StatusOK}
+ } else if strings.Contains(url, "verify-request") {
+ assert.Equal(t, "POST", req.Method)
+ assert.Equal(t, MediaType, req.Header.Get("Content-Type"))
+
+ var vp Pointer
+ err := json.NewDecoder(req.Body).Decode(&vp)
+ require.NoError(t, err)
+ assert.Equal(t, p.Oid, vp.Oid)
+ assert.Equal(t, p.Size, vp.Size)
+
+ return &http.Response{StatusCode: http.StatusOK}
+ } else if strings.Contains(url, "error-response") {
+ er := &ErrorResponse{
+ Message: "Object not found",
+ }
+ payload := new(bytes.Buffer)
+ json.NewEncoder(payload).Encode(er)
+
+ return &http.Response{StatusCode: http.StatusNotFound, Body: io.NopCloser(payload)}
+ }
+ t.Errorf("Unknown test case: %s", url)
+ return nil
+ }
+
+ hc := &http.Client{Transport: RoundTripFunc(roundTripHandler)}
+ a := &BasicTransferAdapter{hc}
+
+ t.Run("Download", func(t *testing.T) {
+ cases := []struct {
+ link *Link
+ expectederror string
+ }{
+ // case 0
+ {
+ link: &Link{
+ Href: "https://download-request.io",
+ Header: map[string]string{"test-header": "test-value"},
+ },
+ expectederror: "",
+ },
+ // case 1
+ {
+ link: &Link{
+ Href: "https://error-response.io",
+ Header: map[string]string{"test-header": "test-value"},
+ },
+ expectederror: "Object not found",
+ },
+ }
+
+ for n, c := range cases {
+ _, err := a.Download(context.Background(), c.link)
+ if len(c.expectederror) > 0 {
+ assert.True(t, strings.Contains(err.Error(), c.expectederror), "case %d: '%s' should contain '%s'", n, err.Error(), c.expectederror)
+ } else {
+ require.NoError(t, err, "case %d", n)
+ }
+ }
+ })
+
+ t.Run("Upload", func(t *testing.T) {
+ cases := []struct {
+ link *Link
+ expectederror string
+ }{
+ // case 0
+ {
+ link: &Link{
+ Href: "https://upload-request.io",
+ Header: map[string]string{"test-header": "test-value"},
+ },
+ expectederror: "",
+ },
+ // case 1
+ {
+ link: &Link{
+ Href: "https://error-response.io",
+ Header: map[string]string{"test-header": "test-value"},
+ },
+ expectederror: "Object not found",
+ },
+ }
+
+ for n, c := range cases {
+ err := a.Upload(context.Background(), c.link, p, bytes.NewBufferString("dummy"))
+ if len(c.expectederror) > 0 {
+ assert.True(t, strings.Contains(err.Error(), c.expectederror), "case %d: '%s' should contain '%s'", n, err.Error(), c.expectederror)
+ } else {
+ require.NoError(t, err, "case %d", n)
+ }
+ }
+ })
+
+ t.Run("Verify", func(t *testing.T) {
+ cases := []struct {
+ link *Link
+ expectederror string
+ }{
+ // case 0
+ {
+ link: &Link{
+ Href: "https://verify-request.io",
+ Header: map[string]string{"test-header": "test-value"},
+ },
+ expectederror: "",
+ },
+ // case 1
+ {
+ link: &Link{
+ Href: "https://error-response.io",
+ Header: map[string]string{"test-header": "test-value"},
+ },
+ expectederror: "Object not found",
+ },
+ }
+
+ for n, c := range cases {
+ err := a.Verify(context.Background(), c.link, p)
+ if len(c.expectederror) > 0 {
+ assert.True(t, strings.Contains(err.Error(), c.expectederror), "case %d: '%s' should contain '%s'", n, err.Error(), c.expectederror)
+ } else {
+ require.NoError(t, err, "case %d", n)
+ }
+ }
+ })
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 17:39:37 +0100