dorkbox.cabParser.CabParser Maven / Gradle / Ivy

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Parse and extract data from inside Microsoft .cab files, specifically those compressed with LZX, for java.
There is a newer version: 3.4
/*
 * Copyright 2012 dorkbox, llc
 *
 * 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.
 */
package dorkbox.cabParser;

import dorkbox.cabParser.decompress.CabDecompressor;
import dorkbox.cabParser.structure.CabEnumerator;
import dorkbox.cabParser.structure.CabFileEntry;
import dorkbox.cabParser.structure.CabFolderEntry;
import dorkbox.cabParser.structure.CabHeader;
import dorkbox.util.process.NullOutputStream;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;

public final class CabParser {
    private CabInputStream cabInputStream;

    private CabStreamSaver streamSaver;
    private ByteArrayOutputStream outputStream = null;

    public CabHeader header;

    public CabFolderEntry[] folders;
    public CabFileEntry[]   files;

    public
    CabParser(InputStream inputStream, final String fileNameToExtract) throws CabException, IOException {
        if (fileNameToExtract == null || fileNameToExtract.isEmpty()) {
            throw new IllegalArgumentException("Filename must be valid!");
        }

        this.cabInputStream = new CabInputStream(inputStream);
        this.streamSaver = new CabStreamSaver() {
            @Override
            public boolean saveReservedAreaData(byte[] data, int dataLength) {
                return false;
            }

            @Override
            public OutputStream openOutputStream(CabFileEntry cabFile) {
                String name = cabFile.getName();
                if (fileNameToExtract.equalsIgnoreCase(name)) {
                    CabParser.this.outputStream = new ByteArrayOutputStream((int) cabFile.getSize());
                    return CabParser.this.outputStream;
                } else {
                    return null;
                }
            }

            @Override
            public void closeOutputStream(OutputStream outputStream, CabFileEntry cabFile) {
                if (outputStream != null) {
                    try {
                        outputStream.close();
                    } catch (IOException ignored) {
                    }
                }
            }
        };

        readData();
    }

    public
    CabParser(InputStream inputStream, CabStreamSaver streamSaver) throws CabException, IOException {
        this.streamSaver = streamSaver;
        this.cabInputStream = new CabInputStream(inputStream);

        readData();
    }

    /**
     * Gets the version number.
     */
    public static
    String getVersion() {
        return "2.9";
    }

    public Enumeration