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package example
import (
"errors"
"fmt"
"io/ioutil"
"os"
"strconv"
"github.com/flipped-aurora/gin-vue-admin/server/global"
"github.com/flipped-aurora/gin-vue-admin/server/model/example"
"gorm.io/gorm"
)
type SimpleUploaderService struct {
}
//@author: [piexlmax](https://github.com/piexlmax)
//@function: SaveChunk
//@description: 保存文件切片路径
//@param: uploader model.ExaSimpleUploader
//@return: err error
func (exa *SimpleUploaderService) SaveChunk(uploader example.ExaSimpleUploader) (err error) {
return global.GVA_DB.Create(uploader).Error
}
//@author: [piexlmax](https://github.com/piexlmax)
//@function: CheckFileMd5
//@description: 检查文件是否已经上传过
//@param: md5 string
//@return: err error, uploads []model.ExaSimpleUploader, isDone bool
func (exa *SimpleUploaderService) CheckFileMd5(md5 string) (err error, uploads []example.ExaSimpleUploader, isDone bool) {
err = global.GVA_DB.Find(&uploads, "identifier = ? AND is_done = ?", md5, false).Error
isDone = errors.Is(global.GVA_DB.First(&example.ExaSimpleUploader{}, "identifier = ? AND is_done = ?", md5, true).Error, gorm.ErrRecordNotFound)
return err, uploads, !isDone
}
//@author: [piexlmax](https://github.com/piexlmax)
//@function: MergeFileMd5
//@description: 合并文件
//@param: md5 string, fileName string
//@return: err error
func (exa *SimpleUploaderService) MergeFileMd5(md5 string, fileName string) (err error) {
finishDir := "./finish/"
dir := "./chunk/" + md5
// 如果文件上传成功 不做后续操作 通知成功即可
if !errors.Is(global.GVA_DB.First(&example.ExaSimpleUploader{}, "identifier = ? AND is_done = ?", md5, true).Error, gorm.ErrRecordNotFound) {
return nil
}
// 打开切片文件夹
rd, err := ioutil.ReadDir(dir)
_ = os.MkdirAll(finishDir, os.ModePerm)
// 创建目标文件
fd, err := os.OpenFile(finishDir+fileName, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
if err != nil {
return
}
// 关闭文件
defer fd.Close()
// 将切片文件按照顺序写入
for k := range rd {
content, _ := ioutil.ReadFile(dir + "/" + fileName + strconv.Itoa(k+1))
_, err = fd.Write(content)
if err != nil {
_ = os.Remove(finishDir + fileName)
}
}
if err != nil {
return err
}
err = global.GVA_DB.Transaction(func(tx *gorm.DB) error {
// 删除切片信息
if err = tx.Delete(&example.ExaSimpleUploader{}, "identifier = ? AND is_done = ?", md5, false).Error; err != nil {
fmt.Println(err)
return err
}
data := example.ExaSimpleUploader{
Identifier: md5,
IsDone: true,
FilePath: finishDir + fileName,
Filename: fileName,
}
// 添加文件信息
if err = tx.Create(&data).Error; err != nil {
fmt.Println(err)
return err
}
return nil
})
err = os.RemoveAll(dir) // 清除切片
return err
}