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239 lines
9.5 KiB
239 lines
9.5 KiB
// sevenzipParser.java
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// -------------------------------------
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// part of YACY
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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//
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// This file ist contributed by Franz Brausze
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.document.parser;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.Date;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.document.AbstractParser;
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import net.yacy.document.Document;
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import net.yacy.document.Parser;
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import net.yacy.document.TextParser;
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import net.yacy.kelondro.util.FileUtils;
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import SevenZip.ArchiveExtractCallback;
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import SevenZip.IInStream;
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import SevenZip.Archive.IInArchive;
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import SevenZip.Archive.SevenZipEntry;
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import SevenZip.Archive.SevenZip.Handler;
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public class sevenzipParser extends AbstractParser implements Parser {
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public sevenzipParser() {
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super("7zip Archive Parser");
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this.SUPPORTED_EXTENSIONS.add("7z");
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this.SUPPORTED_MIME_TYPES.add("application/x-7z-compressed");
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}
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public Document parse(final DigestURL location, final String mimeType, final String charset, final IInStream source) throws Parser.Failure, InterruptedException {
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final Document doc = new Document(
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location,
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mimeType,
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charset,
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this,
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null,
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null,
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null,
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null,
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null,
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null,
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null,
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0.0f, 0.0f,
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(Object)null,
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null,
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null,
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null,
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false,
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new Date());
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Handler archive;
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AbstractParser.log.fine("opening 7zip archive...");
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try {
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archive = new Handler(source);
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} catch (final IOException e) {
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throw new Parser.Failure("error opening 7zip archive: " + e.getMessage(), location);
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}
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final SZParserExtractCallback aec = new SZParserExtractCallback(AbstractParser.log, archive, doc, location.getFile());
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AbstractParser.log.fine("processing archive contents...");
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try {
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archive.Extract(null, -1, 0, aec);
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return doc;
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} catch (final IOException e) {
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if (e.getCause() instanceof InterruptedException)
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throw (InterruptedException)e.getCause();
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if (e.getCause() instanceof Parser.Failure)
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throw (Parser.Failure)e.getCause();
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throw new Parser.Failure(
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"error processing 7zip archive at internal file " + aec.getCurrentFilePath() + ": " + e.getMessage(),
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location);
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} finally {
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try { archive.close(); } catch (final IOException e) { }
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}
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}
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public Document parse(final DigestURL location, final String mimeType, final String charset, final byte[] source) throws Parser.Failure, InterruptedException {
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return parse(location, mimeType, charset, new ByteArrayIInStream(source));
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}
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@Override
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public Document[] parse(final DigestURL location, final String mimeType, final String charset, final InputStream source) throws Parser.Failure, InterruptedException {
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try {
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final ByteArrayOutputStream cfos = new ByteArrayOutputStream();
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FileUtils.copy(source, cfos);
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return new Document[]{parse(location, mimeType, charset, cfos.toByteArray())};
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} catch (final IOException e) {
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throw new Parser.Failure("error processing 7zip archive: " + e.getMessage(), location);
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}
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}
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// wrapper class to redirect output of standard ArchiveExtractCallback to serverLog
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// and parse the extracted content
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private static class SZParserExtractCallback extends ArchiveExtractCallback {
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private final ConcurrentLog log;
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private ByteArrayOutputStream cfos = null;
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private final Document doc;
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private final String prefix;
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public SZParserExtractCallback(final ConcurrentLog logger, final IInArchive handler,
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final Document doc, final String prefix) {
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super.Init(handler);
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this.log = logger;
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this.doc = doc;
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this.prefix = prefix;
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}
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@Override
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public void PrepareOperation(final int arg0) {
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this.extractMode = (arg0 == IInArchive.NExtract_NAskMode_kExtract);
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switch (arg0) {
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case IInArchive.NExtract_NAskMode_kExtract:
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this.log.fine("Extracting " + this.filePath);
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break;
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case IInArchive.NExtract_NAskMode_kTest:
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this.log.fine("Testing " + this.filePath);
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break;
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case IInArchive.NExtract_NAskMode_kSkip:
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this.log.fine("Skipping " + this.filePath);
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break;
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}
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}
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@Override
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public void SetOperationResult(final int arg0) throws IOException {
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if (arg0 != IInArchive.NExtract_NOperationResult_kOK) {
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this.NumErrors++;
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switch(arg0) {
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case IInArchive.NExtract_NOperationResult_kUnSupportedMethod:
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throw new IOException("Unsupported Method");
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case IInArchive.NExtract_NOperationResult_kCRCError:
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throw new IOException("CRC Failed");
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case IInArchive.NExtract_NOperationResult_kDataError:
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throw new IOException("Data Error");
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default:
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// throw new IOException("Unknown Error");
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}
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} else try {
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if (this.cfos != null) {
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// parse the file
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Document[] theDocs;
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// workaround for relative links in file, normally '#' shall be used behind the location, see
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// below for reversion of the effects
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final DigestURL url = DigestURL.newURL(this.doc.dc_source(), this.prefix + "/" + super.filePath);
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final String mime = TextParser.mimeOf(super.filePath.substring(super.filePath.lastIndexOf('.') + 1));
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theDocs = TextParser.parseSource(url, mime, null, this.cfos.toByteArray());
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this.doc.addSubDocuments(theDocs);
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}
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} catch (final Exception e) {
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final IOException ex = new IOException("error parsing extracted content of " + super.filePath + ": " + e.getMessage());
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ex.initCause(e);
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throw ex;
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}
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}
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@Override
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public OutputStream GetStream(final int index, final int askExtractMode) throws IOException {
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final SevenZipEntry item = super.archiveHandler.getEntry(index);
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super.filePath = item.getName();
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this.cfos = (item.isDirectory()) ? null : new ByteArrayOutputStream();
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return this.cfos;
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}
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public String getCurrentFilePath() {
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return super.filePath;
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}
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}
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private static class SeekableByteArrayInputStream extends ByteArrayInputStream {
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public SeekableByteArrayInputStream(final byte[] buf) { super(buf); }
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public SeekableByteArrayInputStream(final byte[] buf, final int off, final int len) { super(buf, off, len); }
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public int getPosition() { return super.pos; }
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public void seekRelative(final int offset) { seekAbsolute(super.pos + offset); }
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public void seekAbsolute(final int offset) {
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if (offset > super.count)
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throw new IndexOutOfBoundsException(Integer.toString(offset));
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super.pos = offset;
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}
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}
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private static class ByteArrayIInStream extends IInStream {
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private final SeekableByteArrayInputStream sbais;
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public ByteArrayIInStream(final byte[] buffer) {
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this.sbais = new SeekableByteArrayInputStream(buffer);
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}
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@Override
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public long Seek(final long offset, final int origin) {
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switch (origin) {
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case STREAM_SEEK_SET: this.sbais.seekAbsolute((int)offset); break;
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case STREAM_SEEK_CUR: this.sbais.seekRelative((int)offset); break;
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}
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return this.sbais.getPosition();
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}
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@Override
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public int read() throws IOException {
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return this.sbais.read();
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}
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@Override
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public int read(final byte[] b, final int off, final int len) throws IOException {
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return this.sbais.read(b, off, len);
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}
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}
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}
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