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|
package mc
import (
"context"
"io"
"io/ioutil"
"net/http"
)
type MeasurableConnection interface {
Start(context.Context) bool
Transferred() uint64
}
type LoadBearingDownload struct {
Path string
downloaded uint64
client *http.Client
}
func (lbc *LoadBearingDownload) Transferred() uint64 {
return lbc.downloaded
}
func (lbc *LoadBearingDownload) Start(ctx context.Context) bool {
lbc.downloaded = 0
lbc.client = &http.Client{}
get, err := lbc.client.Get(lbc.Path)
if err != nil {
return false
}
go doDownload(get, &lbc.downloaded, ctx)
return true
}
func doDownload(get *http.Response, count *uint64, ctx context.Context) {
for ctx.Err() == nil {
n, err := io.CopyN(ioutil.Discard, get.Body, 100)
if err != nil {
break
}
*count += uint64(n)
}
get.Body.Close()
}
type LoadBearingUpload struct {
Path string
uploaded uint64
client *http.Client
}
func (lbu *LoadBearingUpload) Transferred() uint64 {
return lbu.uploaded
}
type syntheticCountingReader struct {
n *uint64
ctx context.Context
}
func (s *syntheticCountingReader) Read(p []byte) (n int, err error) {
if s.ctx.Err() != nil {
return 0, io.EOF
}
err = nil
n = len(p)
*s.n += uint64(n)
return
}
func (lbu *LoadBearingUpload) Start(ctx context.Context) bool {
lbu.uploaded = 0
lbu.client = &http.Client{}
s := &syntheticCountingReader{n: &lbu.uploaded, ctx: ctx}
go func() {
resp, _ := lbu.client.Post(lbu.Path, "application/octet-stream", s)
resp.Body.Close()
}()
return true
}
|
