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package oss
import (
"crypto/md5"
"encoding/base64"
"encoding/json"
"errors"
"io/ioutil"
"os"
"time"
)
//
// UploadFile 分片上传文件
//
// objectKey object名称。
// filePath 本地文件。需要上传的文件。
// partSize 本次上传文件片的大小,字节数。比如100 * 1024为每片100KB。
// options 上传Object时可以指定Object的属性。详见InitiateMultipartUpload。
//
// error 操作成功为nil,非nil为错误信息。
//
func (bucket Bucket) UploadFile(objectKey, filePath string, partSize int64, options ...Option) error {
if partSize < MinPartSize || partSize > MaxPartSize {
return errors.New("oss: part size invalid range (1024KB, 5GB]")
}
cpConf, err := getCpConfig(options, filePath)
if err != nil {
return err
}
routines := getRoutines(options)
if cpConf.IsEnable {
return bucket.uploadFileWithCp(objectKey, filePath, partSize, options, cpConf.FilePath, routines)
}
return bucket.uploadFile(objectKey, filePath, partSize, options, routines)
}
// ----- 并发无断点的上传 -----
// 获取Checkpoint配置
func getCpConfig(options []Option, filePath string) (*cpConfig, error) {
cpc := &cpConfig{}
cpcOpt, err := findOption(options, checkpointConfig, nil)
if err != nil || cpcOpt == nil {
return cpc, err
}
cpc = cpcOpt.(*cpConfig)
if cpc.IsEnable && cpc.FilePath == "" {
cpc.FilePath = filePath + CheckpointFileSuffix
}
return cpc, nil
}
// 获取并发数,默认并发数1
func getRoutines(options []Option) int {
rtnOpt, err := findOption(options, routineNum, nil)
if err != nil || rtnOpt == nil {
return 1
}
rs := rtnOpt.(int)
if rs < 1 {
rs = 1
} else if rs > 100 {
rs = 100
}
return rs
}
// 获取进度回调
func getProgressListener(options []Option) ProgressListener {
isSet, listener, _ := isOptionSet(options, progressListener)
if !isSet {
return nil
}
return listener.(ProgressListener)
}
// 测试使用
type uploadPartHook func(id int, chunk FileChunk) error
var uploadPartHooker uploadPartHook = defaultUploadPart
func defaultUploadPart(id int, chunk FileChunk) error {
return nil
}
// 工作协程参数
type workerArg struct {
bucket *Bucket
filePath string
imur InitiateMultipartUploadResult
hook uploadPartHook
}
// 工作协程
func worker(id int, arg workerArg, jobs <-chan FileChunk, results chan<- UploadPart, failed chan<- error, die <-chan bool) {
for chunk := range jobs {
if err := arg.hook(id, chunk); err != nil {
failed <- err
break
}
part, err := arg.bucket.UploadPartFromFile(arg.imur, arg.filePath, chunk.Offset, chunk.Size, chunk.Number)
if err != nil {
failed <- err
break
}
select {
case <-die:
return
default:
}
results <- part
}
}
// 调度协程
func scheduler(jobs chan FileChunk, chunks []FileChunk) {
for _, chunk := range chunks {
jobs <- chunk
}
close(jobs)
}
func getTotalBytes(chunks []FileChunk) int64 {
var tb int64
for _, chunk := range chunks {
tb += chunk.Size
}
return tb
}
// 并发上传,不带断点续传功能
func (bucket Bucket) uploadFile(objectKey, filePath string, partSize int64, options []Option, routines int) error {
listener := getProgressListener(options)
chunks, err := SplitFileByPartSize(filePath, partSize)
if err != nil {
return err
}
// 初始化上传任务
imur, err := bucket.InitiateMultipartUpload(objectKey, options...)
if err != nil {
return err
}
jobs := make(chan FileChunk, len(chunks))
results := make(chan UploadPart, len(chunks))
failed := make(chan error)
die := make(chan bool)
var completedBytes int64
totalBytes := getTotalBytes(chunks)
event := newProgressEvent(TransferStartedEvent, 0, totalBytes)
publishProgress(listener, event)
// 启动工作协程
arg := workerArg{&bucket, filePath, imur, uploadPartHooker}
for w := 1; w <= routines; w++ {
go worker(w, arg, jobs, results, failed, die)
}
// 并发上传分片
go scheduler(jobs, chunks)
// 等待分配分片上传完成
completed := 0
parts := make([]UploadPart, len(chunks))
for completed < len(chunks) {
select {
case part := <-results:
completed++
parts[part.PartNumber-1] = part
completedBytes += chunks[part.PartNumber-1].Size
event = newProgressEvent(TransferDataEvent, completedBytes, totalBytes)
publishProgress(listener, event)
case err := <-failed:
close(die)
event = newProgressEvent(TransferFailedEvent, completedBytes, totalBytes)
publishProgress(listener, event)
bucket.AbortMultipartUpload(imur)
return err
}
if completed >= len(chunks) {
break
}
}
event = newProgressEvent(TransferStartedEvent, completedBytes, totalBytes)
publishProgress(listener, event)
// 提交任务
_, err = bucket.CompleteMultipartUpload(imur, parts)
if err != nil {
bucket.AbortMultipartUpload(imur)
return err
}
return nil
}
// ----- 并发带断点的上传 -----
const uploadCpMagic = "FE8BB4EA-B593-4FAC-AD7A-2459A36E2E62"
type uploadCheckpoint struct {
Magic string // magic
MD5 string // cp内容的MD5
FilePath string // 本地文件
FileStat cpStat // 文件状态
ObjectKey string // key
UploadID string // upload id
Parts []cpPart // 本地文件的全部分片
}
type cpStat struct {
Size int64 // 文件大小
LastModified time.Time // 本地文件最后修改时间
MD5 string // 本地文件MD5
}
type cpPart struct {
Chunk FileChunk // 分片
Part UploadPart // 上传完成的分片
IsCompleted bool // upload是否完成
}
// CP数据是否有效,CP有效且文件没有更新时有效
func (cp uploadCheckpoint) isValid(filePath 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 != uploadCpMagic || b64 != cp.MD5 {
return false, nil
}
// 确认本地文件是否更新
fd, err := os.Open(filePath)
if err != nil {
return false, err
}
defer fd.Close()
st, err := fd.Stat()
if err != nil {
return false, err
}
md, err := calcFileMD5(filePath)
if err != nil {
return false, err
}
// 比较文件大小/文件最后更新时间/文件MD5
if cp.FileStat.Size != st.Size() ||
cp.FileStat.LastModified != st.ModTime() ||
cp.FileStat.MD5 != md {
return false, nil
}
return true, nil
}
// 从文件中load
func (cp *uploadCheckpoint) load(filePath string) error {
contents, err := ioutil.ReadFile(filePath)
if err != nil {
return err
}
err = json.Unmarshal(contents, cp)
return err
}
// dump到文件
func (cp *uploadCheckpoint) 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)
}
// 更新分片状态
func (cp *uploadCheckpoint) updatePart(part UploadPart) {
cp.Parts[part.PartNumber-1].Part = part
cp.Parts[part.PartNumber-1].IsCompleted = true
}
// 未完成的分片
func (cp *uploadCheckpoint) todoParts() []FileChunk {
fcs := []FileChunk{}
for _, part := range cp.Parts {
if !part.IsCompleted {
fcs = append(fcs, part.Chunk)
}
}
return fcs
}
// 所有的分片
func (cp *uploadCheckpoint) allParts() []UploadPart {
ps := []UploadPart{}
for _, part := range cp.Parts {
ps = append(ps, part.Part)
}
return ps
}
// 完成的字节数
func (cp *uploadCheckpoint) getCompletedBytes() int64 {
var completedBytes int64
for _, part := range cp.Parts {
if part.IsCompleted {
completedBytes += part.Chunk.Size
}
}
return completedBytes
}
// 计算文件文件MD5
func calcFileMD5(filePath string) (string, error) {
return "", nil
}
// 初始化分片上传
func prepare(cp *uploadCheckpoint, objectKey, filePath string, partSize int64, bucket *Bucket, options []Option) error {
// cp
cp.Magic = uploadCpMagic
cp.FilePath = filePath
cp.ObjectKey = objectKey
// localfile
fd, err := os.Open(filePath)
if err != nil {
return err
}
defer fd.Close()
st, err := fd.Stat()
if err != nil {
return err
}
cp.FileStat.Size = st.Size()
cp.FileStat.LastModified = st.ModTime()
md, err := calcFileMD5(filePath)
if err != nil {
return err
}
cp.FileStat.MD5 = md
// chunks
parts, err := SplitFileByPartSize(filePath, partSize)
if err != nil {
return err
}
cp.Parts = make([]cpPart, len(parts))
for i, part := range parts {
cp.Parts[i].Chunk = part
cp.Parts[i].IsCompleted = false
}
// init load
imur, err := bucket.InitiateMultipartUpload(objectKey, options...)
if err != nil {
return err
}
cp.UploadID = imur.UploadID
return nil
}
// 提交分片上传,删除CP文件
func complete(cp *uploadCheckpoint, bucket *Bucket, parts []UploadPart, cpFilePath string) error {
imur := InitiateMultipartUploadResult{Bucket: bucket.BucketName,
Key: cp.ObjectKey, UploadID: cp.UploadID}
_, err := bucket.CompleteMultipartUpload(imur, parts)
if err != nil {
return err
}
os.Remove(cpFilePath)
return err
}
// 并发带断点的上传
func (bucket Bucket) uploadFileWithCp(objectKey, filePath string, partSize int64, options []Option, cpFilePath string, routines int) error {
listener := getProgressListener(options)
// LOAD CP数据
ucp := uploadCheckpoint{}
err := ucp.load(cpFilePath)
if err != nil {
os.Remove(cpFilePath)
}
// LOAD出错或数据无效重新初始化上传
valid, err := ucp.isValid(filePath)
if err != nil || !valid {
if err = prepare(&ucp, objectKey, filePath, partSize, &bucket, options); err != nil {
return err
}
os.Remove(cpFilePath)
}
chunks := ucp.todoParts()
imur := InitiateMultipartUploadResult{
Bucket: bucket.BucketName,
Key: objectKey,
UploadID: ucp.UploadID}
jobs := make(chan FileChunk, len(chunks))
results := make(chan UploadPart, len(chunks))
failed := make(chan error)
die := make(chan bool)
completedBytes := ucp.getCompletedBytes()
event := newProgressEvent(TransferStartedEvent, completedBytes, ucp.FileStat.Size)
publishProgress(listener, event)
// 启动工作协程
arg := workerArg{&bucket, filePath, imur, uploadPartHooker}
for w := 1; w <= routines; w++ {
go worker(w, arg, jobs, results, failed, die)
}
// 并发上传分片
go scheduler(jobs, chunks)
// 等待分配分片上传完成
completed := 0
for completed < len(chunks) {
select {
case part := <-results:
completed++
ucp.updatePart(part)
ucp.dump(cpFilePath)
completedBytes += ucp.Parts[part.PartNumber-1].Chunk.Size
event = newProgressEvent(TransferDataEvent, completedBytes, ucp.FileStat.Size)
publishProgress(listener, event)
case err := <-failed:
close(die)
event = newProgressEvent(TransferFailedEvent, completedBytes, ucp.FileStat.Size)
publishProgress(listener, event)
return err
}
if completed >= len(chunks) {
break
}
}
event = newProgressEvent(TransferCompletedEvent, completedBytes, ucp.FileStat.Size)
publishProgress(listener, event)
// 提交分片上传
err = complete(&ucp, &bucket, ucp.allParts(), cpFilePath)
return err
}