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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Bell Canada.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.rest.utils;
import lombok.Getter;
import lombok.Setter;
import org.onap.cps.spi.exceptions.ModelValidationException;
@Setter
@Getter
public class ZipFileSizeValidator {
private static final int THRESHOLD_ENTRIES = 10000;
private static final int THRESHOLD_SIZE = 100000000;
private static final double THRESHOLD_RATIO = 40;
private static final String INVALID_ZIP = "Invalid ZIP archive content.";
private int totalSizeArchive = 0;
private int totalEntryInArchive = 0;
private long compressedSize = 0;
/**
* Increment the totalEntryInArchive by 1.
*/
public void incrementTotalEntryInArchive() {
totalEntryInArchive++;
}
/**
* Update the totalSizeArchive by numberOfBytesRead.
* @param numberOfBytesRead the number of bytes of each entry
*/
public void updateTotalSizeArchive(final int numberOfBytesRead) {
totalSizeArchive += numberOfBytesRead;
}
/**
* Validate the total Compression size of the zip.
* @param totalEntrySize the size of the unzipped entry.
*/
public void validateCompresssionRatio(final int totalEntrySize) {
final double compressionRatio = (double) totalEntrySize / compressedSize;
if (compressionRatio > THRESHOLD_RATIO) {
throw new ModelValidationException(INVALID_ZIP,
String.format("Ratio between compressed and uncompressed data exceeds the CPS limit"
+ " %s.", THRESHOLD_RATIO));
}
}
/**
* Validate the total Size and number of entries in the zip.
*/
public void validateSizeAndEntries() {
if (totalSizeArchive > THRESHOLD_SIZE) {
throw new ModelValidationException(INVALID_ZIP,
String.format("The uncompressed data size exceeds the CPS limit %s bytes.", THRESHOLD_SIZE));
}
if (totalEntryInArchive > THRESHOLD_ENTRIES) {
throw new ModelValidationException(INVALID_ZIP,
String.format("The number of entries in the archive exceeds the CPS limit %s.",
THRESHOLD_ENTRIES));
}
}
}
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