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Implement Alibaba Cloud OSS gateway support (#5103)

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This commit is contained in:
Timon Wong
2017-12-19 16:25:17 +08:00
committed by Nitish Tiwari
parent a182fe8c15
commit 84fc78d60f
24 changed files with 7476 additions and 0 deletions
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461
vendor/github.com/aliyun/aliyun-oss-go-sdk/oss/multicopy.go generated vendored Normal file
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package oss
import (
"crypto/md5"
"encoding/base64"
"encoding/json"
"errors"
"io/ioutil"
"os"
"path/filepath"
"strconv"
)
//
// CopyFile 分片复制文件
//
// srcBucketName 源Bucket名称。
// srcObjectKey 源Object名称。
// destObjectKey 目标Object名称。目标Bucket名称为Bucket.BucketName。
// partSize 复制文件片的大小，字节数。比如100 * 1024为每片100KB。
// options Object的属性限制项。详见InitiateMultipartUpload。
//
// error 操作成功error为nil，非nil为错误信息。
//
func (bucket Bucket) CopyFile(srcBucketName, srcObjectKey, destObjectKey string, partSize int64, options ...Option) error {
destBucketName := bucket.BucketName
if partSize < MinPartSize || partSize > MaxPartSize {
return errors.New("oss: part size invalid range (1024KB, 5GB]")
}
cpConf, err := getCpConfig(options, filepath.Base(destObjectKey))
if err != nil {
return err
}
routines := getRoutines(options)
if cpConf.IsEnable {
return bucket.copyFileWithCp(srcBucketName, srcObjectKey, destBucketName, destObjectKey,
partSize, options, cpConf.FilePath, routines)
}
return bucket.copyFile(srcBucketName, srcObjectKey, destBucketName, destObjectKey,
partSize, options, routines)
}
// ----- 并发无断点的下载 -----
// 工作协程参数
type copyWorkerArg struct {
bucket *Bucket
imur InitiateMultipartUploadResult
srcBucketName string
srcObjectKey string
options []Option
hook copyPartHook
}
// Hook用于测试
type copyPartHook func(part copyPart) error
var copyPartHooker copyPartHook = defaultCopyPartHook
func defaultCopyPartHook(part copyPart) error {
return nil
}
// 工作协程
func copyWorker(id int, arg copyWorkerArg, jobs <-chan copyPart, results chan<- UploadPart, failed chan<- error, die <-chan bool) {
for chunk := range jobs {
if err := arg.hook(chunk); err != nil {
failed <- err
break
}
chunkSize := chunk.End - chunk.Start + 1
part, err := arg.bucket.UploadPartCopy(arg.imur, arg.srcBucketName, arg.srcObjectKey,
chunk.Start, chunkSize, chunk.Number, arg.options...)
if err != nil {
failed <- err
break
}
select {
case <-die:
return
default:
}
results <- part
}
}
// 调度协程
func copyScheduler(jobs chan copyPart, parts []copyPart) {
for _, part := range parts {
jobs <- part
}
close(jobs)
}
// 分片
type copyPart struct {
Number int // 片序号[1, 10000]
Start int64 // 片起始位置
End int64 // 片结束位置
}
// 文件分片
func getCopyParts(bucket *Bucket, objectKey string, partSize int64) ([]copyPart, error) {
meta, err := bucket.GetObjectDetailedMeta(objectKey)
if err != nil {
return nil, err
}
parts := []copyPart{}
objectSize, err := strconv.ParseInt(meta.Get(HTTPHeaderContentLength), 10, 0)
if err != nil {
return nil, err
}
part := copyPart{}
i := 0
for offset := int64(0); offset < objectSize; offset += partSize {
part.Number = i + 1
part.Start = offset
part.End = GetPartEnd(offset, objectSize, partSize)
parts = append(parts, part)
i++
}
return parts, nil
}
// 获取源文件大小
func getSrcObjectBytes(parts []copyPart) int64 {
var ob int64
for _, part := range parts {
ob += (part.End - part.Start + 1)
}
return ob
}
// 并发无断点续传的下载
func (bucket Bucket) copyFile(srcBucketName, srcObjectKey, destBucketName, destObjectKey string,
partSize int64, options []Option, routines int) error {
descBucket, err := bucket.Client.Bucket(destBucketName)
srcBucket, err := bucket.Client.Bucket(srcBucketName)
listener := getProgressListener(options)
// 分割文件
parts, err := getCopyParts(srcBucket, srcObjectKey, partSize)
if err != nil {
return err
}
// 初始化上传任务
imur, err := descBucket.InitiateMultipartUpload(destObjectKey, options...)
if err != nil {
return err
}
jobs := make(chan copyPart, len(parts))
results := make(chan UploadPart, len(parts))
failed := make(chan error)
die := make(chan bool)
var completedBytes int64
totalBytes := getSrcObjectBytes(parts)
event := newProgressEvent(TransferStartedEvent, 0, totalBytes)
publishProgress(listener, event)
// 启动工作协程
arg := copyWorkerArg{descBucket, imur, srcBucketName, srcObjectKey, options, copyPartHooker}
for w := 1; w <= routines; w++ {
go copyWorker(w, arg, jobs, results, failed, die)
}
// 并发上传分片
go copyScheduler(jobs, parts)
// 等待分片下载完成
completed := 0
ups := make([]UploadPart, len(parts))
for completed < len(parts) {
select {
case part := <-results:
completed++
ups[part.PartNumber-1] = part
completedBytes += (parts[part.PartNumber-1].End - parts[part.PartNumber-1].Start + 1)
event = newProgressEvent(TransferDataEvent, completedBytes, totalBytes)
publishProgress(listener, event)
case err := <-failed:
close(die)
descBucket.AbortMultipartUpload(imur)
event = newProgressEvent(TransferFailedEvent, completedBytes, totalBytes)
publishProgress(listener, event)
return err
}
if completed >= len(parts) {
break
}
}
event = newProgressEvent(TransferCompletedEvent, completedBytes, totalBytes)
publishProgress(listener, event)
// 提交任务
_, err = descBucket.CompleteMultipartUpload(imur, ups)
if err != nil {
bucket.AbortMultipartUpload(imur)
return err
}
return nil
}
// ----- 并发有断点的下载 -----
const copyCpMagic = "84F1F18C-FF1D-403B-A1D8-9DEB5F65910A"
type copyCheckpoint struct {
Magic string // magic
MD5 string // cp内容的MD5
SrcBucketName string // 源Bucket
SrcObjectKey string // 源Object
DestBucketName string // 目标Bucket
DestObjectKey string // 目标Bucket
CopyID string // copy id
ObjStat objectStat // 文件状态
Parts []copyPart // 全部分片
CopyParts []UploadPart // 分片上传成功后的返回值
PartStat []bool // 分片下载是否完成
}
// CP数据是否有效，CP有效且Object没有更新时有效
func (cp copyCheckpoint) isValid(bucket *Bucket, objectKey string) (bool, error) {
// 比较CP的Magic及MD5
cpb := cp
cpb.MD5 = ""
js, _ := json.Marshal(cpb)
sum := md5.Sum(js)
b64 := base64.StdEncoding.EncodeToString(sum[:])
if cp.Magic != downloadCpMagic || b64 != cp.MD5 {
return false, nil
}
// 确认object没有更新
meta, err := bucket.GetObjectDetailedMeta(objectKey)
if err != nil {
return false, err
}
objectSize, err := strconv.ParseInt(meta.Get(HTTPHeaderContentLength), 10, 0)
if err != nil {
return false, err
}
// 比较Object的大小/最后修改时间/etag
if cp.ObjStat.Size != objectSize ||
cp.ObjStat.LastModified != meta.Get(HTTPHeaderLastModified) ||
cp.ObjStat.Etag != meta.Get(HTTPHeaderEtag) {
return false, nil
}
return true, nil
}
// 从文件中load
func (cp *copyCheckpoint) load(filePath string) error {
contents, err := ioutil.ReadFile(filePath)
if err != nil {
return err
}
err = json.Unmarshal(contents, cp)
return err
}
// 更新分片状态
func (cp *copyCheckpoint) update(part UploadPart) {
cp.CopyParts[part.PartNumber-1] = part
cp.PartStat[part.PartNumber-1] = true
}
// dump到文件
func (cp *copyCheckpoint) dump(filePath string) error {
bcp := *cp
// 计算MD5
bcp.MD5 = ""
js, err := json.Marshal(bcp)
if err != nil {
return err
}
sum := md5.Sum(js)
b64 := base64.StdEncoding.EncodeToString(sum[:])
bcp.MD5 = b64
// 序列化
js, err = json.Marshal(bcp)
if err != nil {
return err
}
// dump
return ioutil.WriteFile(filePath, js, FilePermMode)
}
// 未完成的分片
func (cp copyCheckpoint) todoParts() []copyPart {
dps := []copyPart{}
for i, ps := range cp.PartStat {
if !ps {
dps = append(dps, cp.Parts[i])
}
}
return dps
}
// 完成的字节数
func (cp copyCheckpoint) getCompletedBytes() int64 {
var completedBytes int64
for i, part := range cp.Parts {
if cp.PartStat[i] {
completedBytes += (part.End - part.Start + 1)
}
}
return completedBytes
}
// 初始化下载任务
func (cp *copyCheckpoint) prepare(srcBucket *Bucket, srcObjectKey string, destBucket *Bucket, destObjectKey string,
partSize int64, options []Option) error {
// cp
cp.Magic = copyCpMagic
cp.SrcBucketName = srcBucket.BucketName
cp.SrcObjectKey = srcObjectKey
cp.DestBucketName = destBucket.BucketName
cp.DestObjectKey = destObjectKey
// object
meta, err := srcBucket.GetObjectDetailedMeta(srcObjectKey)
if err != nil {
return err
}
objectSize, err := strconv.ParseInt(meta.Get(HTTPHeaderContentLength), 10, 0)
if err != nil {
return err
}
cp.ObjStat.Size = objectSize
cp.ObjStat.LastModified = meta.Get(HTTPHeaderLastModified)
cp.ObjStat.Etag = meta.Get(HTTPHeaderEtag)
// parts
cp.Parts, err = getCopyParts(srcBucket, srcObjectKey, partSize)
if err != nil {
return err
}
cp.PartStat = make([]bool, len(cp.Parts))
for i := range cp.PartStat {
cp.PartStat[i] = false
}
cp.CopyParts = make([]UploadPart, len(cp.Parts))
// init copy
imur, err := destBucket.InitiateMultipartUpload(destObjectKey, options...)
if err != nil {
return err
}
cp.CopyID = imur.UploadID
return nil
}
func (cp *copyCheckpoint) complete(bucket *Bucket, parts []UploadPart, cpFilePath string) error {
imur := InitiateMultipartUploadResult{Bucket: cp.DestBucketName,
Key: cp.DestObjectKey, UploadID: cp.CopyID}
_, err := bucket.CompleteMultipartUpload(imur, parts)
if err != nil {
return err
}
os.Remove(cpFilePath)
return err
}
// 并发带断点的下载
func (bucket Bucket) copyFileWithCp(srcBucketName, srcObjectKey, destBucketName, destObjectKey string,
partSize int64, options []Option, cpFilePath string, routines int) error {
descBucket, err := bucket.Client.Bucket(destBucketName)
srcBucket, err := bucket.Client.Bucket(srcBucketName)
listener := getProgressListener(options)
// LOAD CP数据
ccp := copyCheckpoint{}
err = ccp.load(cpFilePath)
if err != nil {
os.Remove(cpFilePath)
}
// LOAD出错或数据无效重新初始化下载
valid, err := ccp.isValid(srcBucket, srcObjectKey)
if err != nil || !valid {
if err = ccp.prepare(srcBucket, srcObjectKey, descBucket, destObjectKey, partSize, options); err != nil {
return err
}
os.Remove(cpFilePath)
}
// 未完成的分片
parts := ccp.todoParts()
imur := InitiateMultipartUploadResult{
Bucket: destBucketName,
Key: destObjectKey,
UploadID: ccp.CopyID}
jobs := make(chan copyPart, len(parts))
results := make(chan UploadPart, len(parts))
failed := make(chan error)
die := make(chan bool)
completedBytes := ccp.getCompletedBytes()
event := newProgressEvent(TransferStartedEvent, completedBytes, ccp.ObjStat.Size)
publishProgress(listener, event)
// 启动工作协程
arg := copyWorkerArg{descBucket, imur, srcBucketName, srcObjectKey, options, copyPartHooker}
for w := 1; w <= routines; w++ {
go copyWorker(w, arg, jobs, results, failed, die)
}
// 并发下载分片
go copyScheduler(jobs, parts)
// 等待分片下载完成
completed := 0
for completed < len(parts) {
select {
case part := <-results:
completed++
ccp.update(part)
ccp.dump(cpFilePath)
completedBytes += (parts[part.PartNumber-1].End - parts[part.PartNumber-1].Start + 1)
event = newProgressEvent(TransferDataEvent, completedBytes, ccp.ObjStat.Size)
publishProgress(listener, event)
case err := <-failed:
close(die)
event = newProgressEvent(TransferFailedEvent, completedBytes, ccp.ObjStat.Size)
publishProgress(listener, event)
return err
}
if completed >= len(parts) {
break
}
}
event = newProgressEvent(TransferCompletedEvent, completedBytes, ccp.ObjStat.Size)
publishProgress(listener, event)
return ccp.complete(descBucket, ccp.CopyParts, cpFilePath)
}