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78 lines
2.0 KiB
78 lines
2.0 KiB
package utils
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import (
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"io/ioutil"
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"os"
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"strconv"
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)
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// 前端传来文件片与当前片为什么文件的第几片
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// 后端拿到以后比较次分片是否上传 或者是否为不完全片
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// 前端发送每片多大
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// 前端告知是否为最后一片且是否完成
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const breakpointDir = "./breakpointDir/"
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const finishDir = "./fileDir/"
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func BreakPointContinue(content []byte, fileName string, contentNumber int, contentTotal int, fileMd5 string) (error, string) {
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path := breakpointDir + fileMd5 + "/"
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err := os.MkdirAll(path, os.ModePerm)
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if err != nil {
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return err, path
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}
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err, pathc := makeFileContent(content, fileName, path, contentNumber)
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return err, pathc
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}
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func CheckMd5(content []byte, chunkMd5 string) (CanUpload bool) {
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fileMd5 := MD5V(content)
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if fileMd5 == chunkMd5 {
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return true // "可以继续上传"
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} else {
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return false // "切片不完整，废弃"
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}
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}
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func makeFileContent(content []byte, fileName string, FileDir string, contentNumber int) (error, string) {
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path := FileDir + fileName + "_" + strconv.Itoa(contentNumber)
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f, err := os.Create(path)
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if err != nil {
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return err, path
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} else {
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_, err = f.Write(content)
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if err != nil {
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return err, path
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}
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}
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defer f.Close()
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return nil, path
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}
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func MakeFile(fileName string, FileMd5 string) (error, string) {
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rd, err := ioutil.ReadDir(breakpointDir + FileMd5)
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if err != nil {
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return err, finishDir + fileName
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}
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_ = os.MkdirAll(finishDir, os.ModePerm)
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fd, err := os.OpenFile(finishDir+fileName, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
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if err != nil {
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return err, finishDir + fileName
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}
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defer fd.Close()
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for k := range rd {
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content, _ := ioutil.ReadFile(breakpointDir + FileMd5 + "/" + fileName + "_" + strconv.Itoa(k))
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_, err = fd.Write(content)
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if err != nil {
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_ = os.Remove(finishDir + fileName)
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return err, finishDir + fileName
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}
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}
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return nil, finishDir + fileName
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}
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func RemoveChunk(FileMd5 string) error {
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err := os.RemoveAll(breakpointDir + FileMd5)
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return err
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}
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