func (mp MappedPolicy) toSlice() []string {
	var policies []string
	for _, policy := range strings.Split(mp.Policies, ",") {
		if strings.TrimSpace(policy) == "" {
			continue
		}
		policies = append(policies, policy)
	}
	return policies
}

func (mp MappedPolicy) policySet() set.StringSet {
	return set.CreateStringSet(mp.toSlice()...)
}

	if err := checkNewMultipartArgs(ctx, bucket, object); err != nil {
		return nil, err
	}

	defer func() {
		if err == nil && mp != nil {
			z.mpCache.Store(mp.UploadID, MultipartInfo{
				Bucket:    bucket,
				Object:    object,
				UploadID:  mp.UploadID,
				Initiated: time.Now(),
			})
		}

		return
	}

	// Here the parameter is the size of the form data that should
	// be loaded in memory, the remaining being put in temporary files.
	mp, err := multipartReader(r)
	if err != nil {
		apiErr := errorCodes.ToAPIErr(ErrMalformedPOSTRequest)
		apiErr.Description = fmt.Sprintf("%s (%v)", apiErr.Description, err)
		writeErrorResponse(ctx, w, apiErr, r.URL)

		checkRespErr(rec, http.StatusOK)
	} else {
		// Multipart upload - each part is a new DummyDataGen
		// (so the part lengths are required to verify the
		// object when reading).

		// Initiate mp upload
		reqI, err := newTestSignedRequestV4(http.MethodPost, getNewMultipartURL("", bucketName, objectName),
			0, nil, creds.AccessKey, creds.SecretKey, metadata)
		if err != nil {
			t.Fatalf("Unexpected err: %#v", err)

github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=