71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
// Copyright 2021 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 packages
|
|
|
|
import (
|
|
"io"
|
|
|
|
"code.gitea.io/gitea/modules/util/filebuffer"
|
|
)
|
|
|
|
// HashedSizeReader provide methods to read, sum hashes and a Size method
|
|
type HashedSizeReader interface {
|
|
io.Reader
|
|
HashSummer
|
|
Size() int64
|
|
}
|
|
|
|
// HashedBuffer is buffer which calculates multiple checksums
|
|
type HashedBuffer struct {
|
|
*filebuffer.FileBackedBuffer
|
|
|
|
hash *MultiHasher
|
|
|
|
combinedWriter io.Writer
|
|
}
|
|
|
|
// NewHashedBuffer creates a hashed buffer with a specific maximum memory size
|
|
func NewHashedBuffer(maxMemorySize int) (*HashedBuffer, error) {
|
|
b, err := filebuffer.New(maxMemorySize)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
hash := NewMultiHasher()
|
|
|
|
combinedWriter := io.MultiWriter(b, hash)
|
|
|
|
return &HashedBuffer{
|
|
b,
|
|
hash,
|
|
combinedWriter,
|
|
}, nil
|
|
}
|
|
|
|
// CreateHashedBufferFromReader creates a hashed buffer and copies the provided reader data into it.
|
|
func CreateHashedBufferFromReader(r io.Reader, maxMemorySize int) (*HashedBuffer, error) {
|
|
b, err := NewHashedBuffer(maxMemorySize)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
_, err = io.Copy(b, r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return b, nil
|
|
}
|
|
|
|
// Write implements io.Writer
|
|
func (b *HashedBuffer) Write(p []byte) (int, error) {
|
|
return b.combinedWriter.Write(p)
|
|
}
|
|
|
|
// Sums gets the MD5, SHA1, SHA256 and SHA512 checksums of the data
|
|
func (b *HashedBuffer) Sums() (hashMD5, hashSHA1, hashSHA256, hashSHA512 []byte) {
|
|
return b.hash.Sums()
|
|
}
|