// Copyright 2019 The Gitea Authors. All rights reserved. // Use of this source code is governed by a MIT-style // license that can be found in the LICENSE file. package lfs import ( "io" "strconv" "strings" "code.gitea.io/gitea/models" "code.gitea.io/gitea/modules/base" "code.gitea.io/gitea/modules/setting" "code.gitea.io/gitea/modules/storage" ) // ReadPointerFile will return a partially filled LFSMetaObject if the provided reader is a pointer file func ReadPointerFile(reader io.Reader) (*models.LFSMetaObject, *[]byte) { if !setting.LFS.StartServer { return nil, nil } buf := make([]byte, 1024) n, _ := reader.Read(buf) buf = buf[:n] if isTextFile := base.IsTextFile(buf); !isTextFile { return nil, nil } return IsPointerFile(&buf), &buf } // IsPointerFile will return a partially filled LFSMetaObject if the provided byte slice is a pointer file func IsPointerFile(buf *[]byte) *models.LFSMetaObject { if !setting.LFS.StartServer { return nil } headString := string(*buf) if !strings.HasPrefix(headString, models.LFSMetaFileIdentifier) { return nil } splitLines := strings.Split(headString, "\n") if len(splitLines) < 3 { return nil } oid := strings.TrimPrefix(splitLines[1], models.LFSMetaFileOidPrefix) size, err := strconv.ParseInt(strings.TrimPrefix(splitLines[2], "size "), 10, 64) if len(oid) != 64 || err != nil { return nil } contentStore := &ContentStore{ObjectStorage: storage.LFS} meta := &models.LFSMetaObject{Oid: oid, Size: size} exist, err := contentStore.Exists(meta) if err != nil || !exist { return nil } return meta } // ReadMetaObject will read a models.LFSMetaObject and return a reader func ReadMetaObject(meta *models.LFSMetaObject) (io.ReadCloser, error) { contentStore := &ContentStore{ObjectStorage: storage.LFS} return contentStore.Get(meta) }