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105 lines
2.3 KiB
Go
105 lines
2.3 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package git
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import (
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"bytes"
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"encoding/base64"
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"errors"
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"io"
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"code.gitea.io/gitea/modules/typesniffer"
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"code.gitea.io/gitea/modules/util"
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)
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// This file contains common functions between the gogit and !gogit variants for git Blobs
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// Name returns name of the tree entry this blob object was created from (or empty string)
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func (b *Blob) Name() string {
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return b.name
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}
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// GetBlobContent Gets the limited content of the blob as raw text
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func (b *Blob) GetBlobContent(limit int64) (string, error) {
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if limit <= 0 {
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return "", nil
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}
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dataRc, err := b.DataAsync()
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if err != nil {
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return "", err
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}
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defer dataRc.Close()
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buf, err := util.ReadWithLimit(dataRc, int(limit))
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return string(buf), err
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}
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// GetBlobLineCount gets line count of the blob.
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// It will also try to write the content to w if it's not nil, then we could pre-fetch the content without reading it again.
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func (b *Blob) GetBlobLineCount(w io.Writer) (int, error) {
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reader, err := b.DataAsync()
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if err != nil {
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return 0, err
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}
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defer reader.Close()
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buf := make([]byte, 32*1024)
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count := 1
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lineSep := []byte{'\n'}
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for {
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c, err := reader.Read(buf)
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if w != nil {
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if _, err := w.Write(buf[:c]); err != nil {
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return count, err
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}
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}
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count += bytes.Count(buf[:c], lineSep)
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switch {
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case errors.Is(err, io.EOF):
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return count, nil
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case err != nil:
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return count, err
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}
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}
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}
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// GetBlobContentBase64 Reads the content of the blob with a base64 encode and returns the encoded string
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func (b *Blob) GetBlobContentBase64() (string, error) {
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dataRc, err := b.DataAsync()
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if err != nil {
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return "", err
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}
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defer dataRc.Close()
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pr, pw := io.Pipe()
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encoder := base64.NewEncoder(base64.StdEncoding, pw)
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go func() {
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_, err := io.Copy(encoder, dataRc)
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_ = encoder.Close()
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if err != nil {
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_ = pw.CloseWithError(err)
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} else {
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_ = pw.Close()
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}
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}()
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out, err := io.ReadAll(pr)
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if err != nil {
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return "", err
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}
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return string(out), nil
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}
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// GuessContentType guesses the content type of the blob.
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func (b *Blob) GuessContentType() (typesniffer.SniffedType, error) {
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r, err := b.DataAsync()
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if err != nil {
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return typesniffer.SniffedType{}, err
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}
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defer r.Close()
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return typesniffer.DetectContentTypeFromReader(r)
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}
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