Feat: download file with speed limit

pull/247/head
HFO4 5 years ago
parent 29def02489
commit 9bb432c220

@ -10,6 +10,7 @@ require (
github.com/gin-gonic/gin v1.4.0
github.com/go-ini/ini v1.50.0
github.com/jinzhu/gorm v1.9.11
github.com/juju/ratelimit v1.0.1
github.com/mattn/go-colorable v0.1.4 // indirect
github.com/mcuadros/go-version v0.0.0-20190830083331-035f6764e8d2
github.com/mojocn/base64Captcha v0.0.0-20190801020520-752b1cd608b2

@ -4,6 +4,7 @@ import (
"context"
model "github.com/HFO4/cloudreve/models"
"github.com/HFO4/cloudreve/pkg/util"
"github.com/juju/ratelimit"
"io"
)
@ -12,6 +13,23 @@ import (
============
*/
// 限速后的ReaderSeeker
type lrs struct {
io.ReadSeeker
r io.Reader
}
func (r lrs) Read(p []byte) (int, error) {
return r.r.Read(p)
}
// withSpeedLimit 给原有的ReadSeeker加上限速
func withSpeedLimit(rs io.ReadSeeker, speed int) io.ReadSeeker {
bucket := ratelimit.NewBucketWithRate(float64(speed), int64(speed))
lrs := lrs{rs, ratelimit.Reader(rs, bucket)}
return lrs
}
// AddFile 新增文件记录
func (fs *FileSystem) AddFile(ctx context.Context, parent *model.Folder) (*model.File, error) {
file := ctx.Value(FileHeaderCtx).(FileHeader)
@ -35,6 +53,23 @@ func (fs *FileSystem) AddFile(ctx context.Context, parent *model.Folder) (*model
return &newFile, nil
}
// GetDownloadContent 获取用于下载的文件流
func (fs *FileSystem) GetDownloadContent(ctx context.Context, path string) (io.ReadSeeker, error) {
// 获取原始文件流
rs, err := fs.GetContent(ctx, path)
if err != nil {
return nil, err
}
// 如果用户组有速度限制就返回限制流速的ReaderSeeker
if fs.User.Group.SpeedLimit != 0 {
return withSpeedLimit(rs, fs.User.Group.SpeedLimit), nil
}
// 否则返回原始流
return rs, nil
}
// GetContent 获取文件内容path为虚拟路径
// TODO:测试
func (fs *FileSystem) GetContent(ctx context.Context, path string) (io.ReadSeeker, error) {

@ -77,6 +77,8 @@ func (fs *FileSystem) CancelUpload(ctx context.Context, path string, file FileHe
case <-ctx.Done():
// 客户端正常关闭,不执行操作
default:
// 客户端取消上传,删除临时文件
util.Log().Debug("客户端取消上传")
if fs.AfterUploadCanceled == nil {
return
}

@ -24,7 +24,7 @@ func (service *FileDownloadService) Download(ctx context.Context, c *gin.Context
// 开始处理下载
ctx = context.WithValue(ctx, filesystem.GinCtx, c)
rs, err := fs.GetContent(ctx, service.Path)
rs, err := fs.GetDownloadContent(ctx, service.Path)
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}

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