// Copyright (c) 2015-2021 MinIO, Inc.//// This file is part of MinIO Object Storage stack//// This program is free software: you can redistribute it and/or modify// it under the terms of the GNU Affero General Public License as published by// the Free Software Foundation, either version 3 of the License, or// (at your option) any later version.//// This program is distributed in the hope that it will be useful// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the// GNU Affero General Public License for more details.//// You should have received a copy of the GNU Affero General Public License// along with this program.  If not, see <http://www.gnu.org/licenses/>. package cmd import (	"encoding/base64"	"net/url"	"strconv") // Parse bucket url queriesfunc getListObjectsV1Args(values url.Values) (prefix, marker, delimiter string, maxkeys int, encodingType string, errCode APIErrorCode) {	errCode = ErrNone 	if values.Get("max-keys") != "" {		var err error		if maxkeys, err = strconv.Atoi(values.Get("max-keys")); err != nil {			errCode = ErrInvalidMaxKeys			return		}	} else {		maxkeys = maxObjectList	} 	prefix = trimLeadingSlash(values.Get("prefix"))	marker = trimLeadingSlash(values.Get("marker"))	delimiter = values.Get("delimiter")	encodingType = values.Get("encoding-type")	return} func getListBucketObjectVersionsArgs(values url.Values) (prefix, marker, delimiter string, maxkeys int, encodingType, versionIDMarker string, errCode APIErrorCode) {	errCode = ErrNone 	if values.Get("max-keys") != "" {		var err error		if maxkeys, err = strconv.Atoi(values.Get("max-keys")); err != nil {			errCode = ErrInvalidMaxKeys			return		}	} else {		maxkeys = maxObjectList	} 	prefix = trimLeadingSlash(values.Get("prefix"))	marker = trimLeadingSlash(values.Get("key-marker"))	delimiter = values.Get("delimiter")	encodingType = values.Get("encoding-type")	versionIDMarker = values.Get("version-id-marker")	return} // Parse bucket url queries for ListObjects V2.func getListObjectsV2Args(values url.Values) (prefix, token, startAfter, delimiter string, fetchOwner bool, maxkeys int, encodingType string, errCode APIErrorCode) {	errCode = ErrNone 	// The continuation-token cannot be empty.	if val, ok := values["continuation-token"]; ok {		if len(val[0]) == 0 {			errCode = ErrIncorrectContinuationToken			return		}	} 	if values.Get("max-keys") != "" {		var err error		if maxkeys, err = strconv.Atoi(values.Get("max-keys")); err != nil {			errCode = ErrInvalidMaxKeys			return		}	} else {		maxkeys = maxObjectList	} 	prefix = trimLeadingSlash(values.Get("prefix"))	startAfter = trimLeadingSlash(values.Get("start-after"))	delimiter = values.Get("delimiter")	fetchOwner = values.Get("fetch-owner") == "true"	encodingType = values.Get("encoding-type") 	if token = values.Get("continuation-token"); token != "" {		decodedToken, err := base64.StdEncoding.DecodeString(token)		if err != nil {			errCode = ErrIncorrectContinuationToken			return		}		token = string(decodedToken)	}	return} // Parse bucket url queries for ?uploadsfunc getBucketMultipartResources(values url.Values) (prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int, encodingType string, errCode APIErrorCode) {	errCode = ErrNone 	if values.Get("max-uploads") != "" {		var err error		if maxUploads, err = strconv.Atoi(values.Get("max-uploads")); err != nil {			errCode = ErrInvalidMaxUploads			return		}	} else {		maxUploads = maxUploadsList	} 	prefix = trimLeadingSlash(values.Get("prefix"))	keyMarker = trimLeadingSlash(values.Get("key-marker"))	uploadIDMarker = values.Get("upload-id-marker")	delimiter = values.Get("delimiter")	encodingType = values.Get("encoding-type")	return} // Parse object url queriesfunc getObjectResources(values url.Values) (uploadID string, partNumberMarker, maxParts int, encodingType string, errCode APIErrorCode) {	var err error	errCode = ErrNone 	if values.Get("max-parts") != "" {		if maxParts, err = strconv.Atoi(values.Get("max-parts")); err != nil {			errCode = ErrInvalidMaxParts			return		}	} else {		maxParts = maxPartsList	} 	if values.Get("part-number-marker") != "" {		if partNumberMarker, err = strconv.Atoi(values.Get("part-number-marker")); err != nil {			errCode = ErrInvalidPartNumberMarker			return		}	} 	uploadID = values.Get("uploadId")	encodingType = values.Get("encoding-type")	return}