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