1 files changed, 102 insertions, 0 deletions
diff --git a/modules/git/blob.go b/modules/git/blob.go
new file mode 100644
index 00000000..bcecb42e
--- /dev/null
+++ b/modules/git/blob.go
@@ -0,0 +1,102 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"bytes"
+	"encoding/base64"
+	"io"
+
+	"code.gitea.io/gitea/modules/typesniffer"
+	"code.gitea.io/gitea/modules/util"
+)
+
+// This file contains common functions between the gogit and !gogit variants for git Blobs
+
+// Name returns name of the tree entry this blob object was created from (or empty string)
+func (b *Blob) Name() string {
+	return b.name
+}
+
+// GetBlobContent Gets the limited content of the blob as raw text
+func (b *Blob) GetBlobContent(limit int64) (string, error) {
+	if limit <= 0 {
+		return "", nil
+	}
+	dataRc, err := b.DataAsync()
+	if err != nil {
+		return "", err
+	}
+	defer dataRc.Close()
+	buf, err := util.ReadWithLimit(dataRc, int(limit))
+	return string(buf), err
+}
+
+// GetBlobLineCount gets line count of the blob
+func (b *Blob) GetBlobLineCount() (int, error) {
+	reader, err := b.DataAsync()
+	if err != nil {
+		return 0, err
+	}
+	defer reader.Close()
+	buf := make([]byte, 32*1024)
+	count := 1
+	lineSep := []byte{'\n'}
+
+	c, err := reader.Read(buf)
+	if c == 0 && err == io.EOF {
+		return 0, nil
+	}
+	for {
+		count += bytes.Count(buf[:c], lineSep)
+		switch {
+		case err == io.EOF:
+			return count, nil
+		case err != nil:
+			return count, err
+		}
+		c, err = reader.Read(buf)
+	}
+}
+
+// GetBlobContentBase64 Reads the content of the blob with a base64 encode and returns the encoded string
+func (b *Blob) GetBlobContentBase64() (string, error) {
+	dataRc, err := b.DataAsync()
+	if err != nil {
+		return "", err
+	}
+	defer dataRc.Close()
+
+	pr, pw := io.Pipe()
+	encoder := base64.NewEncoder(base64.StdEncoding, pw)
+
+	go func() {
+		_, err := io.Copy(encoder, dataRc)
+		_ = encoder.Close()
+
+		if err != nil {
+			_ = pw.CloseWithError(err)
+		} else {
+			_ = pw.Close()
+		}
+	}()
+
+	out, err := io.ReadAll(pr)
+	if err != nil {
+		return "", err
+	}
+	return string(out), nil
+}
+
+// GuessContentType guesses the content type of the blob.
+func (b *Blob) GuessContentType() (typesniffer.SniffedType, error) {
+	r, err := b.DataAsync()
+	if err != nil {
+		return typesniffer.SniffedType{}, err
+	}
+	defer r.Close()
+
+	return typesniffer.DetectContentTypeFromReader(r)
+}