func putWrite(c rpc.Client, l rpc.Logger, ret interface{}, uptoken, key string, hasKey bool, data io.Reader, size int64, extra *PutExtra) error {
var b bytes.Buffer
writer := multipart.NewWriter(&b)
err := writeMultipart(writer, uptoken, key, hasKey, extra)
if err != nil {
return err
}
lastLine := fmt.Sprintf("\r\n--%s--\r\n", writer.Boundary())
r := bytes.NewReader([]byte(lastLine))
bodyLen := int64(b.Len()) + size + int64(len(lastLine))
mr := io.MultiReader(&b, data, r)
contentType := writer.FormDataContentType()
return c.CallWith64(l, ret, UP_HOST, contentType, mr, bodyLen)
}
