// sevenzipParser.java
// -------------------------------------
// part of YACY
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// This file ist contributed by Franz Brausze
//
// $LastChangedDate: 2011-04-21 15:58:49 +0200 (Do, 21. Apr 2011) $
// $LastChangedRevision: 7672 $
// $LastChangedBy: orbiter $
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package net.yacy.document.parser;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import net.yacy.cora.document.MultiProtocolURI;
import net.yacy.document.AbstractParser;
import net.yacy.document.Document;
import net.yacy.document.Parser;
import net.yacy.document.TextParser;
import net.yacy.kelondro.logging.Log;
import net.yacy.kelondro.util.FileUtils;
import SevenZip.ArchiveExtractCallback;
import SevenZip.IInStream;
import SevenZip.Archive.IInArchive;
import SevenZip.Archive.SevenZipEntry;
import SevenZip.Archive.SevenZip.Handler;
public class sevenzipParser extends AbstractParser implements Parser {
public sevenzipParser() {
super("7zip Archive Parser");
SUPPORTED_EXTENSIONS.add("7z");
SUPPORTED_MIME_TYPES.add("application/x-7z-compressed");
}
public Document parse(final MultiProtocolURI location, final String mimeType, final String charset, final IInStream source) throws Parser.Failure, InterruptedException {
final Document doc = new Document(
location,
mimeType,
charset,
this,
null,
null,
null,
null,
null,
null,
null,
0.0f, 0.0f,
(Object)null,
null,
null,
null,
false);
Handler archive;
super.log.logFine("opening 7zip archive...");
try {
archive = new Handler(source);
} catch (final IOException e) {
throw new Parser.Failure("error opening 7zip archive: " + e.getMessage(), location);
}
final SZParserExtractCallback aec = new SZParserExtractCallback(super.log, archive,
doc, location.getFile());
super.log.logFine("processing archive contents...");
try {
archive.Extract(null, -1, 0, aec);
return doc;
} catch (final IOException e) {
if (e.getCause() instanceof InterruptedException)
throw (InterruptedException)e.getCause();
if (e.getCause() instanceof Parser.Failure)
throw (Parser.Failure)e.getCause();
throw new Parser.Failure(
"error processing 7zip archive at internal file " + aec.getCurrentFilePath() + ": " + e.getMessage(),
location);
} finally {
try { archive.close(); } catch (final IOException e) { }
}
}
public Document[] parse(final MultiProtocolURI location, final String mimeType, final String charset,
final InputStream source) throws Parser.Failure, InterruptedException {
try {
final ByteArrayOutputStream cfos = new ByteArrayOutputStream();
FileUtils.copy(source, cfos);
return parse(location, mimeType, charset, new ByteArrayInputStream(cfos.toByteArray()));
} catch (final IOException e) {
throw new Parser.Failure("error processing 7zip archive: " + e.getMessage(), location);
}
}
// wrapper class to redirect output of standard ArchiveExtractCallback to serverLog
// and parse the extracted content
private static class SZParserExtractCallback extends ArchiveExtractCallback {
private final Log log;
private ByteArrayOutputStream cfos = null;
private final Document doc;
private final String prefix;
public SZParserExtractCallback(final Log logger, final IInArchive handler,
final Document doc, final String prefix) {
super.Init(handler);
this.log = logger;
this.doc = doc;
this.prefix = prefix;
}
@Override
public void PrepareOperation(final int arg0) {
this.extractMode = (arg0 == IInArchive.NExtract_NAskMode_kExtract);
switch (arg0) {
case IInArchive.NExtract_NAskMode_kExtract:
this.log.logFine("Extracting " + this.filePath);
break;
case IInArchive.NExtract_NAskMode_kTest:
this.log.logFine("Testing " + this.filePath);
break;
case IInArchive.NExtract_NAskMode_kSkip:
this.log.logFine("Skipping " + this.filePath);
break;
}
}
@Override
public void SetOperationResult(final int arg0) throws IOException {
if (arg0 != IInArchive.NExtract_NOperationResult_kOK) {
this.NumErrors++;
switch(arg0) {
case IInArchive.NExtract_NOperationResult_kUnSupportedMethod:
throw new IOException("Unsupported Method");
case IInArchive.NExtract_NOperationResult_kCRCError:
throw new IOException("CRC Failed");
case IInArchive.NExtract_NOperationResult_kDataError:
throw new IOException("Data Error");
default:
// throw new IOException("Unknown Error");
}
} else try {
if (this.cfos != null) {
// parse the file
Document[] theDocs;
// workaround for relative links in file, normally '#' shall be used behind the location, see
// below for reversion of the effects
final MultiProtocolURI url = MultiProtocolURI.newURL(doc.dc_source(), this.prefix + "/" + super.filePath);
final String mime = TextParser.mimeOf(super.filePath.substring(super.filePath.lastIndexOf('.') + 1));
theDocs = TextParser.parseSource(url, mime, null, this.cfos.toByteArray());
this.doc.addSubDocuments(theDocs);
}
} catch (final Exception e) {
final IOException ex = new IOException("error parsing extracted content of " + super.filePath + ": " + e.getMessage());
ex.initCause(e);
throw ex;
}
}
@Override
public OutputStream GetStream(final int index, final int askExtractMode) throws IOException {
final SevenZipEntry item = super.archiveHandler.getEntry(index);
super.filePath = item.getName();
this.cfos = (item.isDirectory()) ? null : new ByteArrayOutputStream();
return this.cfos;
}
public String getCurrentFilePath() {
return super.filePath;
}
}
}