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