if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	aclHeader := r.Header.Get(xhttp.AmzACL)
	if aclHeader == "" {
		acl := &accessControlPolicy{}
		if err = xmlDecoder(r.Body, acl, r.ContentLength); err != nil {
			if terr, ok := err.(*xml.SyntaxError); ok && terr.Msg == io.EOF.Error() {
				writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedXML),
					r.URL)
				return
			}

	if r.ContentLength <= 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingPart), r.URL)
		return
	}

	complMultipartUpload := &CompleteMultipartUpload{}
	if err = xmlDecoder(r.Body, complMultipartUpload, r.ContentLength); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	if len(complMultipartUpload.Parts) == 0 {

		apiRouter.ServeHTTP(rec, req)
		if rec.Code != http.StatusOK {
			t.Fatalf("Test failed to create HTTP request for copy %d", rec.Code)
		}

		resp := &CopyObjectPartResponse{}
		if err = xmlDecoder(rec.Body, resp, rec.Result().ContentLength); err != nil {
			t.Fatalf("Test failed to decode XML response: <ERROR> %v", err)
		}

		parts = append(parts, CompletePart{
			PartNumber: partNumber,