Source Code Cross Referenced for zipParser.java in  » Search-Engine » yacy » de » anomic » plasma » parser » zip » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Search Engine » yacy » de.anomic.plasma.parser.zip 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        //zipParser.java 
002:        //------------------------
003:        //part of YaCy
004:        //(C) by Michael Peter Christen; mc@anomic.de
005:        //first published on http://www.anomic.de
006:        //Frankfurt, Germany, 2005
007:        //
008:        //this file is contributed by Martin Thelian
009:        //last major change: 16.05.2005
010:        //
011:        //This program is free software; you can redistribute it and/or modify
012:        //it under the terms of the GNU General Public License as published by
013:        //the Free Software Foundation; either version 2 of the License, or
014:        //(at your option) any later version.
015:        //
016:        //This program is distributed in the hope that it will be useful,
017:        //but WITHOUT ANY WARRANTY; without even the implied warranty of
018:        //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
019:        //GNU General Public License for more details.
020:        //
021:        //You should have received a copy of the GNU General Public License
022:        //along with this program; if not, write to the Free Software
023:        //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
024:        //
025:        //Using this software in any meaning (reading, learning, copying, compiling,
026:        //running) means that you agree that the Author(s) is (are) not responsible
027:        //for cost, loss of data or any harm that may be caused directly or indirectly
028:        //by usage of this softare or this documentation. The usage of this software
029:        //is on your own risk. The installation and usage (starting/running) of this
030:        //software may allow other people or application to access your computer and
031:        //any attached devices and is highly dependent on the configuration of the
032:        //software which must be done by the user of the software; the author(s) is
033:        //(are) also not responsible for proper configuration and usage of the
034:        //software, even if provoked by documentation provided together with
035:        //the software.
036:        //
037:        //Any changes to this file according to the GPL as documented in the file
038:        //gpl.txt aside this file in the shipment you received can be done to the
039:        //lines that follows this copyright notice here, but changes must not be
040:        //done inside the copyright notive above. A re-distribution must contain
041:        //the intact and unchanged copyright notice.
042:        //Contributions and changes to the program code must be marked as such.
043:
044:        package de.anomic.plasma.parser.zip;
045:
046:        import java.io.BufferedOutputStream;
047:        import java.io.File;
048:        import java.io.FileOutputStream;
049:        import java.io.InputStream;
050:        import java.io.OutputStream;
051:        import java.util.Arrays;
052:        import java.util.HashMap;
053:        import java.util.Hashtable;
054:        import java.util.LinkedList;
055:        import java.util.Map;
056:        import java.util.TreeSet;
057:        import java.util.zip.ZipEntry;
058:        import java.util.zip.ZipInputStream;
059:
060:        import de.anomic.htmlFilter.htmlFilterImageEntry;
061:        import de.anomic.plasma.plasmaParser;
062:        import de.anomic.plasma.plasmaParserDocument;
063:        import de.anomic.plasma.parser.AbstractParser;
064:        import de.anomic.plasma.parser.Parser;
065:        import de.anomic.plasma.parser.ParserException;
066:        import de.anomic.server.serverByteBuffer;
067:        import de.anomic.server.serverFileUtils;
068:        import de.anomic.yacy.yacyURL;
069:
070:        public class zipParser extends AbstractParser implements  Parser {
071:
072:            /**
073:             * a list of mime types that are supported by this parser class
074:             * @see #getSupportedMimeTypes()
075:             */
076:            public static final Hashtable<String, String> SUPPORTED_MIME_TYPES = new Hashtable<String, String>();
077:            static {
078:                SUPPORTED_MIME_TYPES.put("application/zip", "zip");
079:                SUPPORTED_MIME_TYPES.put("application/x-zip", "zip");
080:                SUPPORTED_MIME_TYPES.put("application/x-zip-compressed", "zip");
081:                SUPPORTED_MIME_TYPES.put("application/java-archive", "jar");
082:            }
083:
084:            /**
085:             * a list of library names that are needed by this parser
086:             * @see Parser#getLibxDependences()
087:             */
088:            private static final String[] LIBX_DEPENDENCIES = new String[] {};
089:
090:            public zipParser() {
091:                super (LIBX_DEPENDENCIES);
092:                this .parserName = "Compressed Archive File Parser";
093:            }
094:
095:            public Hashtable<String, String> getSupportedMimeTypes() {
096:                return SUPPORTED_MIME_TYPES;
097:            }
098:
099:            public plasmaParserDocument parse(yacyURL location,
100:                    String mimeType, String charset, InputStream source)
101:                    throws ParserException, InterruptedException {
102:
103:                long docTextLength = 0;
104:                OutputStream docText = null;
105:                File outputFile = null;
106:                plasmaParserDocument subDoc = null;
107:                try {
108:                    if ((this .contentLength == -1)
109:                            || (this .contentLength > Parser.MAX_KEEP_IN_MEMORY_SIZE)) {
110:                        outputFile = File.createTempFile("zipParser", ".tmp");
111:                        docText = new BufferedOutputStream(
112:                                new FileOutputStream(outputFile));
113:                    } else {
114:                        docText = new serverByteBuffer();
115:                    }
116:
117:                    StringBuffer docKeywords = new StringBuffer();
118:                    StringBuffer docLongTitle = new StringBuffer();
119:                    LinkedList<String> docSections = new LinkedList<String>();
120:                    StringBuffer docAbstrct = new StringBuffer();
121:                    Map<yacyURL, String> docAnchors = new HashMap<yacyURL, String>();
122:                    TreeSet<htmlFilterImageEntry> docImages = new TreeSet<htmlFilterImageEntry>();
123:
124:                    // creating a new parser class to parse the unzipped content
125:                    plasmaParser theParser = new plasmaParser();
126:
127:                    // looping through the contained files
128:                    ZipEntry entry;
129:                    ZipInputStream zippedContent = new ZipInputStream(source);
130:                    while ((entry = zippedContent.getNextEntry()) != null) {
131:                        // check for interruption
132:                        checkInterruption();
133:
134:                        // skip directories
135:                        if (entry.isDirectory())
136:                            continue;
137:
138:                        // Get the entry name
139:                        String entryName = entry.getName();
140:                        int idx = entryName.lastIndexOf(".");
141:
142:                        // getting the file extension
143:                        String entryExt = (idx > -1) ? entryName
144:                                .substring(idx + 1) : "";
145:
146:                        // trying to determine the mimeType per file extension   
147:                        String entryMime = plasmaParser
148:                                .getMimeTypeByFileExt(entryExt);
149:
150:                        // parsing the content
151:                        File subDocTempFile = null;
152:                        try {
153:                            // create the temp file
154:                            subDocTempFile = createTempFile(entryName);
155:
156:                            // copy the data into the file
157:                            serverFileUtils.copy(zippedContent, subDocTempFile,
158:                                    entry.getSize());
159:
160:                            // parsing the zip file entry
161:                            subDoc = theParser.parseSource(yacyURL.newURL(
162:                                    location, "#" + entryName), entryMime,
163:                                    null, subDocTempFile);
164:                        } catch (ParserException e) {
165:                            this .theLogger
166:                                    .logInfo("Unable to parse zip file entry '"
167:                                            + entryName + "'. "
168:                                            + e.getMessage());
169:                        } finally {
170:                            if (subDocTempFile != null)
171:                                try {
172:                                    subDocTempFile.delete();
173:                                } catch (Exception ex) {/* ignore this */
174:                                }
175:                        }
176:                        if (subDoc == null)
177:                            continue;
178:
179:                        // merging all documents together
180:                        if (docKeywords.length() > 0)
181:                            docKeywords.append(",");
182:                        docKeywords.append(subDoc.dc_subject(','));
183:
184:                        if (docLongTitle.length() > 0)
185:                            docLongTitle.append("\n");
186:                        docLongTitle.append(subDoc.dc_title());
187:
188:                        docSections.addAll(Arrays.asList(subDoc
189:                                .getSectionTitles()));
190:
191:                        if (docAbstrct.length() > 0)
192:                            docAbstrct.append("\n");
193:                        docAbstrct.append(subDoc.dc_description());
194:
195:                        if (subDoc.getTextLength() > 0) {
196:                            if (docTextLength > 0)
197:                                docText.write('\n');
198:                            docTextLength += serverFileUtils.copy(subDoc
199:                                    .getText(), docText);
200:                        }
201:
202:                        docAnchors.putAll(subDoc.getAnchors());
203:                        docImages.addAll(subDoc.getImages());
204:
205:                        // release subdocument
206:                        subDoc.close();
207:                        subDoc = null;
208:                    }
209:
210:                    plasmaParserDocument result = null;
211:
212:                    if (docText instanceof  serverByteBuffer) {
213:                        result = new plasmaParserDocument(
214:                                location,
215:                                mimeType,
216:                                null,
217:                                docKeywords.toString().split(" |,"),
218:                                docLongTitle.toString(),
219:                                "", // TODO: AUTHOR
220:                                (String[]) docSections
221:                                        .toArray(new String[docSections.size()]),
222:                                docAbstrct.toString(),
223:                                ((serverByteBuffer) docText).getBytes(),
224:                                docAnchors, docImages);
225:                    } else {
226:                        result = new plasmaParserDocument(
227:                                location,
228:                                mimeType,
229:                                null,
230:                                docKeywords.toString().split(" |,"),
231:                                docLongTitle.toString(),
232:                                "", // TODO: AUTHOR
233:                                (String[]) docSections
234:                                        .toArray(new String[docSections.size()]),
235:                                docAbstrct.toString(), outputFile, docAnchors,
236:                                docImages);
237:                    }
238:
239:                    return result;
240:                } catch (Exception e) {
241:                    if (e instanceof  InterruptedException)
242:                        throw (InterruptedException) e;
243:                    if (e instanceof  ParserException)
244:                        throw (ParserException) e;
245:
246:                    if (subDoc != null)
247:                        subDoc.close();
248:
249:                    // close the writer
250:                    if (docText != null)
251:                        try {
252:                            docText.close();
253:                        } catch (Exception ex) {/* ignore this */
254:                        }
255:
256:                    // delete the file
257:                    if (outputFile != null)
258:                        try {
259:                            outputFile.delete();
260:                        } catch (Exception ex) {/* ignore this */
261:                        }
262:
263:                    throw new ParserException(
264:                            "Unexpected error while parsing zip resource. "
265:                                    + e.getClass().getName() + ": "
266:                                    + e.getMessage(), location);
267:                }
268:            }
269:
270:            public void reset() {
271:                // Nothing todo here at the moment
272:                super.reset();
273:            }
274:        }
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