prefix, token, startAfter, delimiter string
		fetchOwner                           bool
		maxKeys                              int
		encodingType                         string
		errCode                              APIErrorCode
	}{
		{
			values: url.Values{
				"prefix":             []string{"photos/"},
				"continuation-token": []string{"dG9rZW4="},
				"start-after":        []string{"start-after"},

	stsRouter.Methods(http.MethodPost).HandlerFunc(httpTraceAll(sts.AssumeRoleWithCustomToken)).
		Queries(stsAction, customTokenIdentity).
		Queries(stsVersion, stsAPIVersion)
}

func apiToSTSError(authErr APIErrorCode) (stsErrCode STSErrorCode) {
	switch authErr {
	case ErrSignatureDoesNotMatch, ErrInvalidAccessKeyID, ErrAccessKeyDisabled:
		return ErrSTSAccessDenied
	case ErrServerNotInitialized:
		return ErrSTSNotInitialized

	owner := &Owner{
		ID:          globalMinioDefaultOwnerID,
		DisplayName: "minio",
	}
	data := ListVersionsResponse{}
	var lastObjMetaName string
	var tagErr, metaErr APIErrorCode = -1, -1

	for _, object := range resp.Objects {
		if object.Name == "" {
			continue
		}
		// Cache checks for the same object
		if metadata != nil && lastObjMetaName != object.Name {

		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	writeSuccessResponseHeadersOnly(w)
}

func handleCreateUpdateValidation(s config.Config, subSys, cfgTarget string, isUpdate bool) APIErrorCode {
	if cfgTarget != madmin.Default {
		// This cannot give an error at this point.
		subSysTargets, _ := s.GetAvailableTargets(subSys)
		subSysTargetsSet := set.CreateStringSet(subSysTargets...)

	}
}

// TestToAdminAPIErrCode - test for toAdminAPIErrCode helper function.
func TestToAdminAPIErrCode(t *testing.T) {
	testCases := []struct {
		err            error
		expectedAPIErr APIErrorCode
	}{
		// 1. Server not in quorum.
		{
			err:            errErasureWriteQuorum,
			expectedAPIErr: ErrAdminConfigNoQuorum,
		},
		// 2. No error.
		{
			err:            nil,

	copyDirective    = "COPY"
	replaceDirective = "REPLACE"
	accessDirective  = "ACCESS"
)

// Parses location constraint from the incoming reader.
func parseLocationConstraint(r *http.Request) (location string, s3Error APIErrorCode) {
	// If the request has no body with content-length set to 0,
	// we do not have to validate location constraint. Bucket will
	// be created at default region.
	locationConstraint := createBucketLocationConfiguration{}

	// validated first.
	"x-amz-date",
	"date",
}

// parseAmzDateHeader - parses supported amz date headers, in
// supported amz date formats.
func parseAmzDateHeader(req *http.Request) (time.Time, APIErrorCode) {
	for _, amzDateHeader := range amzDateHeaders {
		amzDateStr := req.Header.Get(amzDateHeader)
		if amzDateStr != "" {
			t, err := amztime.Parse(amzDateStr)
			if err != nil {

// representation. The clientToken helps ensure there aren't
// conflicting clients fetching status.
func (ahs *allHealState) PopHealStatusJSON(hpath string,
	clientToken string) ([]byte, APIErrorCode,
) {
	// fetch heal state for given path
	h, exists := ahs.getHealSequence(hpath)
	if !exists {
		// heal sequence doesn't exist, must have finished.
		jbytes, err := json.Marshal(healSequenceStatus{

	opts, valid := getAndValidateAttributesOpts(ctx, w, r, bucket, object)
	if !valid {
		return
	}

	var s3Error APIErrorCode
	if opts.VersionID != "" {
		s3Error = checkRequestAuthType(ctx, r, policy.GetObjectVersionAttributesAction, bucket, object)
		if s3Error == ErrNone {

		return
	}

	var (
		md5hex              = clientETag.String()
		sha256hex           = ""
		reader    io.Reader = r.Body
		s3Error   APIErrorCode
	)
	if s3Error = isPutActionAllowed(ctx, rAuthType, bucket, object, r, policy.PutObjectAction); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}