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multiupload.go
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multiupload.go
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package uploader
import (
"context"
"github.com/iikira/BaiduPCS-Go/pcsutil"
"github.com/iikira/BaiduPCS-Go/pcsutil/converter"
"github.com/iikira/BaiduPCS-Go/requester"
"github.com/iikira/BaiduPCS-Go/requester/rio"
"time"
)
type (
// MultiUpload 支持多线程的上传, 可用于断点续传
MultiUpload interface {
Precreate() (perr error)
TmpFile(ctx context.Context, partseq int, partOffset int64, readerlen64 rio.ReaderLen64) (checksum string, terr error)
CreateSuperFile(checksumList ...string) (cerr error)
}
// MultiUploader 多线程上传
MultiUploader struct {
onExecuteEvent requester.Event //开始上传事件
onSuccessEvent requester.Event //成功上传事件
onFinishEvent requester.Event //结束上传事件
onCancelEvent requester.Event //取消上传事件
onErrorEvent requester.EventOnError //上传出错事件
instanceState *InstanceState
multiUpload MultiUpload // 上传体接口
file rio.ReaderAtLen64 // 上传
blockSize int64
parallel int
workers workerList
executeTime time.Time
executed bool
finished chan struct{}
canceled chan struct{}
updateInstanceStateChan chan struct{}
}
)
// NewMultiUploader 初始化上传
func NewMultiUploader(multiUpload MultiUpload, file rio.ReaderAtLen64) *MultiUploader {
return &MultiUploader{
multiUpload: multiUpload,
file: file,
}
}
// SetBlockSize 设置block size
func (muer *MultiUploader) SetBlockSize(blockSize int64) {
muer.blockSize = blockSize
}
// SetParallel 设置parallel, 上传并发量
func (muer *MultiUploader) SetParallel(parallel int) {
muer.parallel = parallel
}
// SetInstanceState 设置InstanceState, 断点续传信息
func (muer *MultiUploader) SetInstanceState(is *InstanceState) {
muer.instanceState = is
}
func (muer *MultiUploader) lazyInit() {
if muer.finished == nil {
muer.finished = make(chan struct{}, 1)
}
if muer.canceled == nil {
muer.canceled = make(chan struct{})
}
if muer.updateInstanceStateChan == nil {
muer.updateInstanceStateChan = make(chan struct{}, 1)
}
if muer.parallel <= 0 {
muer.parallel = 10
}
if muer.blockSize <= 0 {
muer.blockSize = 1 * converter.GB
}
}
func (muer *MultiUploader) check() {
if muer.file == nil {
panic("file is nil")
}
if muer.multiUpload == nil {
panic("multiUpload is nil")
}
}
// Execute 执行上传
func (muer *MultiUploader) Execute() {
muer.check()
muer.lazyInit()
// 分配任务
if muer.instanceState != nil {
muer.workers = instanceStateToWorkerList(muer.instanceState, muer.file)
uploaderVerbose.Infof("upload task CREATED from instance state\n")
} else {
muer.workers = instanceStateToWorkerList(&InstanceState{
BlockList: SplitBlock(muer.file.Len(), muer.blockSize),
}, muer.file)
uploaderVerbose.Infof("upload task CREATED: block size: %d, num: %d\n", muer.blockSize, len(muer.workers))
}
// 开始上传
muer.executed = true
muer.executeTime = time.Now()
pcsutil.Trigger(muer.onExecuteEvent)
err := muer.upload()
// 完成
muer.finished <- struct{}{}
if err != nil {
if err == context.Canceled {
if muer.onCancelEvent != nil {
muer.onCancelEvent()
}
} else if muer.onErrorEvent != nil {
muer.onErrorEvent(err)
}
} else {
pcsutil.TriggerOnSync(muer.onSuccessEvent)
}
pcsutil.TriggerOnSync(muer.onFinishEvent)
}
// InstanceState 返回断点续传信息
func (muer *MultiUploader) InstanceState() *InstanceState {
return workerListToInstanceState(muer.workers)
}
// Cancel 取消上传
func (muer *MultiUploader) Cancel() {
close(muer.canceled)
}
//OnExecute 设置开始上传事件
func (muer *MultiUploader) OnExecute(onExecuteEvent requester.Event) {
muer.onExecuteEvent = onExecuteEvent
}
//OnSuccess 设置成功上传事件
func (muer *MultiUploader) OnSuccess(onSuccessEvent requester.Event) {
muer.onSuccessEvent = onSuccessEvent
}
//OnFinish 设置结束上传事件
func (muer *MultiUploader) OnFinish(onFinishEvent requester.Event) {
muer.onFinishEvent = onFinishEvent
}
//OnCancel 设置取消上传事件
func (muer *MultiUploader) OnCancel(onCancelEvent requester.Event) {
muer.onCancelEvent = onCancelEvent
}
//OnCancel 设置取消上传事件
func (muer *MultiUploader) OnError(onErrorEvent requester.EventOnError) {
muer.onErrorEvent = onErrorEvent
}