if err != nil {
		return c, err
	}

	for _, cfgName := range openIDTargets {
		getCfgVal := func(cfgParam string) string {
			// As parameters are already validated, we skip checking
			// if the config param was found.
			val, _, _ := s.ResolveConfigParam(config.IdentityOpenIDSubSys, cfgName, cfgParam, false)
			return val
		}

		// In the past, when only one openID provider was allowed, there

		}
		if len(params) >= 2 {
			apiErr.Object = decodeDirObject(params[1])
		}
		if len(params) >= 3 {
			apiErr.VersionID = params[2]
		}
		return apiErr
	case errMethodNotAllowed.Error():
		apiErr := MethodNotAllowed{}
		if len(params) >= 1 {
			apiErr.Bucket = params[0]
		}
		if len(params) >= 2 {
			apiErr.Object = decodeDirObject(params[1])
		}
		return apiErr
	case errFileNotFound.Error():

| Params     | Value    |
| :--        | :--      |
| *Type*     | *String* |
| *Required* | *No*     |

### RoleArn

The role ARN to use. This must be specified if and only if the web identity provider is configured with a role policy.

| Params     | Value    |
| :--        | :--      |
| *Type*     | *String* |

	params := []string{args.ConnectionString}
	if args.ConnectionString == "" {
		params = []string{}
		if !args.Host.IsEmpty() {
			params = append(params, "host="+args.Host.String())
		}
		if args.Port != "" {
			params = append(params, "port="+args.Port)
		}
		if args.Username != "" {
			params = append(params, "username="+args.Username)
		}
		if args.Password != "" {

func (s *storageRESTServer) ReadVersionHandlerWS(params *grid.MSS) (*FileInfo, *grid.RemoteErr) {
	if !s.checkID(params.Get(storageRESTDiskID)) {
		return nil, grid.NewRemoteErr(errDiskNotFound)
	}
	origvolume := params.Get(storageRESTOrigVolume)
	volume := params.Get(storageRESTVolume)
	filePath := params.Get(storageRESTFilePath)
	versionID := params.Get(storageRESTVersionID)

) (res RenameDataResp, err error) {
	params := RenameDataHandlerParams{
		DiskID:    *client.diskID.Load(),
		SrcVolume: srcVolume,
		SrcPath:   srcPath,
		DstPath:   dstPath,
		DstVolume: dstVolume,
		FI:        fi,
		Opts:      opts,
	}
	var resp *RenameDataResp
	if fi.Data == nil {
		resp, err = storageRenameDataRPC.Call(ctx, client.gridConn, &params)
	} else {

	if !compareSignatureV2(signature, calculateSignatureV2(policy, cred.SecretKey)) {
		return cred, ErrSignatureDoesNotMatch
	}
	return cred, ErrNone
}

// Escape encodedQuery string into unescaped list of query params, returns error
// if any while unescaping the values.
func unescapeQueries(encodedQuery string) (unescapedQueries []string, err error) {
	for _, query := range strings.Split(encodedQuery, "&") {
		var unescapedQuery string

	cred, _, _ = getReqAccessKeyV4(r, region, serviceS3)
	if cred.AccessKey == "" {
		cred, _, _ = getReqAccessKeyV2(r)
	}
	return cred
}

// Extract request params to be sent with event notification.
func extractReqParams(r *http.Request) map[string]string {
	if r == nil {
		return nil
	}

	region := globalSite.Region
	cred := getReqAccessCred(r, region)

}

func getValidConfig(objAPI ObjectLayer) (config.Config, error) {
	return readServerConfig(GlobalContext, objAPI, nil)
}

// loadConfig - loads a new config from disk, overrides params
// from env if found and valid
// data is optional. If nil it will be loaded from backend.
func loadConfig(objAPI ObjectLayer, data []byte) error {
	bootstrapTraceMsg("load the configuration")

				"X-Amz-Content-Sha256": payloadSHA256,
			},
			region:   "",
			expected: ErrSignatureDoesNotMatch,
		},
		// (8) Should error with signature does not match. But handles
		// query params which do not precede with "x-amz-" header.
		{
			queryParams: map[string]string{
				"X-Amz-Algorithm":       signV4Algorithm,
				"X-Amz-Date":            now.Format(iso8601Format),
				"X-Amz-Expires":         "60",