When I read data in the upload file interface, an error message "http: invalid Read on closed Body" is reported

[jake12138]

I define a interface:

  /upload/image:
    post:
      requestBody:
        content:
          # a binary file of type png or jpeg
          'image/jpeg':
            schema:
              type: string
              format: binary
      responses:
        200:
          description: OK
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Response"

func init() {
	openapi3filter.RegisterBodyDecoder("image/jpeg", openapi3filter.FileBodyDecoder)
	openapi3filter.RegisterBodyDecoder("image/png", openapi3filter.FileBodyDecoder)
}

func(s *Server) PostUploadImage(ctx context.Context, request PostUploadImageRequestObject) (PostUploadImageResponseObject, error) {
	var buf []byte
	size, err := request.Body.Read(buf)
	if err != nil {
		return nil, errors.Msg("").Extend(err).Code(1)
	}
	fmt.Println(size, buf)
	return PostUploadImage200JSONResponse{}, nil
}

When executing request.Body.Read(buf), an error "http: invalid Read on closed Body" is returned. I am not familiar with kin-openapi, and I want to know how to get the correct data.