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109 lines
4.7 KiB
109 lines
4.7 KiB
/**
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* zipParser
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* Copyright 2010 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 29.6.2010 at http://yacy.net
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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 library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.parser;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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import net.yacy.cora.document.MultiProtocolURI;
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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.data.meta.DigestURI;
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import net.yacy.kelondro.util.FileUtils;
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import net.yacy.kelondro.util.MemoryControl;
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// this is a new implementation of this parser idiom using multiple documents as result set
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public class zipParser extends AbstractParser implements Parser {
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public zipParser() {
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super("ZIP File Parser");
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this.SUPPORTED_EXTENSIONS.add("zip");
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this.SUPPORTED_EXTENSIONS.add("jar");
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this.SUPPORTED_EXTENSIONS.add("apk"); // Android package
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this.SUPPORTED_MIME_TYPES.add("application/zip");
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this.SUPPORTED_MIME_TYPES.add("application/x-zip");
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this.SUPPORTED_MIME_TYPES.add("application/x-zip-compressed");
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this.SUPPORTED_MIME_TYPES.add("application/x-compress");
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this.SUPPORTED_MIME_TYPES.add("application/x-compressed");
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this.SUPPORTED_MIME_TYPES.add("multipart/x-zip");
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this.SUPPORTED_MIME_TYPES.add("application/java-archive");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.android.package-archive");
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}
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@Override
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public Document[] parse(final DigestURI url, final String mimeType,
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final String charset, final InputStream source)
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throws Parser.Failure, InterruptedException {
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// check memory for parser
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if (!MemoryControl.request(200 * 1024 * 1024, true))
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throw new Parser.Failure("Not enough Memory available for zip parser: " + MemoryControl.available(), url);
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Document[] docs = null;
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final List<Document> docacc = new ArrayList<Document>();
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ZipEntry entry;
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final ZipInputStream zis = new ZipInputStream(source);
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File tmp = null;
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// loop through the elements in the zip file and parse every single file inside
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while (true) {
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try {
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if (zis.available() <= 0) break;
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entry = zis.getNextEntry();
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if (entry == null) break;
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if (entry.isDirectory() || entry.getSize() <= 0) continue;
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final String name = entry.getName();
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final int idx = name.lastIndexOf('.');
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final String mime = TextParser.mimeOf((idx >= 0) ? name.substring(idx + 1) : "");
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try {
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tmp = FileUtils.createTempFile(this.getClass(), name);
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FileUtils.copy(zis, tmp, entry.getSize());
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final DigestURI virtualURL = new DigestURI(MultiProtocolURI.newURL(url, "#" + name));
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//this.log.logInfo("ZIP file parser: " + virtualURL.toNormalform(false, false));
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docs = TextParser.parseSource(virtualURL, mime, null, tmp);
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if (docs == null) continue;
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for (final Document d: docs) docacc.add(d);
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} catch (final Parser.Failure e) {
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this.log.logWarning("ZIP parser entry " + name + ": " + e.getMessage());
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} finally {
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if (tmp != null) FileUtils.deletedelete(tmp);
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}
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} catch (final IOException e) {
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this.log.logWarning("ZIP parser:" + e.getMessage());
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break;
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}
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}
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if (docacc.isEmpty()) return null;
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return docacc.toArray(new Document[docacc.size()]);
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}
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}
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