mirror of
https://github.com/yunionio/cloudpods.git
synced 2026-05-12 17:14:27 +08:00
70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
// Copyright 2019 Yunion
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package streamutils
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import (
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"crypto/md5"
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"fmt"
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"hash"
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"io"
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)
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type SStreamProperty struct {
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CheckSum string
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Size int64
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}
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func StreamPipe(reader io.Reader, writer io.Writer, CalChecksum bool, callback func(saved int64)) (*SStreamProperty, error) {
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sp := SStreamProperty{}
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var md5sum hash.Hash
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if CalChecksum {
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md5sum = md5.New()
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}
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buf := make([]byte, 4096)
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for {
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n, err := reader.Read(buf)
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if n > 0 {
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sp.Size += int64(n)
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if CalChecksum {
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md5sum.Write(buf[:n])
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}
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offset := 0
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for offset < n {
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m, err := writer.Write(buf[offset:n])
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if err != nil {
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return nil, err
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}
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offset += m
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}
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if callback != nil {
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callback(sp.Size)
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}
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}
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if err != nil {
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if err == io.EOF {
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break
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}
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return nil, err
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}
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}
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if CalChecksum {
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sp.CheckSum = fmt.Sprintf("%x", md5sum.Sum(nil))
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}
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return &sp, nil
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}
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