package uploader import ( "io" "git.frostfs.info/TrueCloudLab/frostfs-http-gw/uploader/multipart" "go.uber.org/zap" ) // MultipartFile provides standard ReadCloser interface and also allows one to // get file name, it's used for multipart uploads. type MultipartFile interface { io.ReadCloser FileName() string } func fetchMultipartFile(l *zap.Logger, r io.Reader, boundary string) (MultipartFile, error) { // To have a custom buffer (3mb) the custom multipart reader is used. // Default reader uses 4KiB chunks, which slow down upload speed up to 400% // https://github.com/golang/go/blob/91b9915d3f6f8cd2e9e9fda63f67772803adfa03/src/mime/multipart/multipart.go#L32 reader := multipart.NewReader(r, boundary) for { part, err := reader.NextPart() if err != nil { return nil, err } name := part.FormName() if name == "" { l.Debug("ignore part, empty form name") continue } filename := part.FileName() // ignore multipart/form-data values if filename == "" { l.Debug("ignore part, empty filename", zap.String("form", name)) continue } return part, nil } }