You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1002 lines
44 KiB
1002 lines
44 KiB
// plasmaParser.java
|
|
// (C) 2005 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
|
|
// first published in january 2005 on http://yacy.net
|
|
// with contributions 02.05.2005 by Martin Thelian
|
|
//
|
|
// This is a part of YaCy, a peer-to-peer based web search engine
|
|
//
|
|
// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
|
|
// $LastChangedRevision: 1986 $
|
|
// $LastChangedBy: orbiter $
|
|
//
|
|
// LICENSE
|
|
//
|
|
// 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 de.anomic.plasma;
|
|
|
|
import java.io.BufferedInputStream;
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.File;
|
|
import java.io.FileFilter;
|
|
import java.io.FileInputStream;
|
|
import java.io.FilenameFilter;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.UnsupportedEncodingException;
|
|
import java.net.MalformedURLException;
|
|
import java.net.URI;
|
|
import java.util.Arrays;
|
|
import java.util.HashMap;
|
|
import java.util.HashSet;
|
|
import java.util.Hashtable;
|
|
import java.util.Iterator;
|
|
import java.util.LinkedList;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
import java.util.Properties;
|
|
import java.util.Set;
|
|
import de.anomic.htmlFilter.htmlFilterContentScraper;
|
|
import de.anomic.htmlFilter.htmlFilterImageEntry;
|
|
import de.anomic.htmlFilter.htmlFilterInputStream;
|
|
import de.anomic.htmlFilter.htmlFilterWriter;
|
|
import de.anomic.http.httpc;
|
|
import de.anomic.plasma.parser.Parser;
|
|
import de.anomic.plasma.parser.ParserException;
|
|
import de.anomic.plasma.parser.ParserInfo;
|
|
import de.anomic.server.serverFileUtils;
|
|
import de.anomic.server.logging.serverLog;
|
|
import de.anomic.yacy.yacyURL;
|
|
|
|
public final class plasmaParser {
|
|
public static final String PARSER_MODE_PROXY = "PROXY";
|
|
public static final String PARSER_MODE_CRAWLER = "CRAWLER";
|
|
public static final String PARSER_MODE_URLREDIRECTOR = "URLREDIRECTOR";
|
|
public static final String PARSER_MODE_ICAP = "ICAP";
|
|
public static final String PARSER_MODE_IMAGE = "IMAGE";
|
|
public static final HashSet PARSER_MODE = new HashSet(Arrays.asList(new String[]{
|
|
PARSER_MODE_PROXY,
|
|
PARSER_MODE_CRAWLER,
|
|
PARSER_MODE_ICAP,
|
|
PARSER_MODE_URLREDIRECTOR,
|
|
PARSER_MODE_IMAGE
|
|
}));
|
|
|
|
private static final HashMap parserConfigList = new HashMap();
|
|
|
|
/**
|
|
* A list containing all installed parsers and the mimeType that they support
|
|
* @see #loadAvailableParserList()
|
|
*/
|
|
public static final Properties availableParserList = new Properties();
|
|
|
|
/**
|
|
* A list of file extensions and mime types that are supported by the html-parser
|
|
*/
|
|
public static final HashSet supportedHTMLFileExt = new HashSet();
|
|
public static final HashSet supportedHTMLMimeTypes = new HashSet();
|
|
|
|
private static final Properties mimeTypeLookupByFileExt = new Properties();
|
|
static {
|
|
// loading a list of extensions from file
|
|
BufferedInputStream bufferedIn = null;
|
|
try {
|
|
mimeTypeLookupByFileExt.load(bufferedIn = new BufferedInputStream(new FileInputStream(new File("httpd.mime"))));
|
|
} catch (IOException e) {
|
|
System.err.println("ERROR: httpd.mime not found in settings path");
|
|
} finally {
|
|
if (bufferedIn != null) try{bufferedIn.close();}catch(Exception e){}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A list of media extensions that should <b>not</b> be handled by the plasmaParser
|
|
*/
|
|
private static final HashSet mediaExtSet = new HashSet();
|
|
|
|
/**
|
|
* A list of image, audio, video and application extensions
|
|
*/
|
|
private static final HashSet imageExtSet = new HashSet();
|
|
private static final HashSet audioExtSet = new HashSet();
|
|
private static final HashSet videoExtSet = new HashSet();
|
|
private static final HashSet appsExtSet = new HashSet();
|
|
|
|
/**
|
|
* This {@link FilenameFilter} is used to find all classes based on there filenames
|
|
* which seems to be additional content parsers.
|
|
* Currently the filenames of all content parser classes must end with <code>Parser.class</code>
|
|
*/
|
|
private static final FilenameFilter parserFileNameFilter = new FilenameFilter() {
|
|
public boolean accept(File dir, String name) {
|
|
return name.endsWith("Parser.class");
|
|
}
|
|
};
|
|
|
|
/**
|
|
* This {@link FileFilter} is used to get all subpackages
|
|
* of the parser package.
|
|
*/
|
|
private static final FileFilter parserDirectoryFilter = new FileFilter() {
|
|
public boolean accept(File file) {
|
|
return file.isDirectory();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Initializing the
|
|
* @see #initMediaExt(String)
|
|
*/
|
|
static {
|
|
String apps = "sit,hqx,img,dmg,exe,com,bat,sh,vbs,zip,jar";
|
|
String audio = "mp2,mp3,ogg,aac,aif,aiff,wav";
|
|
String video = "swf,avi,wmv,rm,mov,mpg,mpeg,ram,m4v";
|
|
String image = "jpg,jpeg,jpe,gif,png,ico,bmp";
|
|
initMediaExt(extString2extList(
|
|
apps + "," + // application container
|
|
"tar,gz,bz2,arj,zip,rar," + // archive formats
|
|
"ps,xls,ppt,asf," + // text formats without support
|
|
audio + "," + // audio formats
|
|
video + "," + // video formats
|
|
image // image formats
|
|
));
|
|
initImageExt(extString2extList(image)); // image formats
|
|
initAudioExt(extString2extList(audio)); // audio formats
|
|
initVideoExt(extString2extList(video)); // video formats
|
|
initAppsExt(extString2extList(apps)); // application formats
|
|
|
|
/* ===================================================
|
|
* loading a list of available parsers
|
|
* =================================================== */
|
|
loadAvailableParserList();
|
|
}
|
|
|
|
private serverLog theLogger = new serverLog("PARSER");
|
|
|
|
public serverLog getLogger() {
|
|
return this.theLogger;
|
|
}
|
|
|
|
public static HashMap getParserConfigList() {
|
|
return parserConfigList;
|
|
}
|
|
|
|
/**
|
|
* This function is used to initialize the HTMLParsableMimeTypes List.
|
|
* This list contains a list of mimeTypes that can be parsed in realtime by
|
|
* the yacy html-Parser
|
|
* @param htmlParsableMimeTypes a list of mimetypes that can be parsed by the
|
|
* yacy html parser
|
|
*/
|
|
public static void initHTMLParsableMimeTypes(String htmlParsableMimeTypes) {
|
|
LinkedList mimeTypes = new LinkedList();
|
|
if ((htmlParsableMimeTypes == null) || (htmlParsableMimeTypes.length() == 0)) {
|
|
return;
|
|
}
|
|
String[] realtimeParsableMimeTypeList = htmlParsableMimeTypes.split(",");
|
|
for (int i = 0; i < realtimeParsableMimeTypeList.length; i++) {
|
|
mimeTypes.add(realtimeParsableMimeTypeList[i].toLowerCase().trim());
|
|
}
|
|
synchronized (supportedHTMLMimeTypes) {
|
|
supportedHTMLMimeTypes.clear();
|
|
supportedHTMLMimeTypes.addAll(mimeTypes);
|
|
}
|
|
}
|
|
|
|
public static List extString2extList(String extString) {
|
|
LinkedList extensions = new LinkedList();
|
|
if ((extString == null) || (extString.length() == 0)) {
|
|
return extensions;
|
|
} else {
|
|
String[] xs = extString.split(",");
|
|
for (int i = 0; i < xs.length; i++) extensions.add(xs[i].toLowerCase().trim());
|
|
}
|
|
return extensions;
|
|
}
|
|
|
|
public static void initMediaExt(List mediaExtList) {
|
|
synchronized (mediaExtSet) {
|
|
mediaExtSet.clear();
|
|
mediaExtSet.addAll(mediaExtList);
|
|
}
|
|
}
|
|
|
|
public static void initImageExt(List imageExtList) {
|
|
synchronized (imageExtSet) {
|
|
imageExtSet.clear();
|
|
imageExtSet.addAll(imageExtList);
|
|
}
|
|
}
|
|
|
|
public static void initAudioExt(List audioExtList) {
|
|
synchronized (audioExtSet) {
|
|
audioExtSet.clear();
|
|
audioExtSet.addAll(audioExtList);
|
|
}
|
|
}
|
|
|
|
public static void initVideoExt(List videoExtList) {
|
|
synchronized (videoExtSet) {
|
|
videoExtSet.clear();
|
|
videoExtSet.addAll(videoExtList);
|
|
}
|
|
}
|
|
|
|
public static void initAppsExt(List appsExtList) {
|
|
synchronized (appsExtSet) {
|
|
appsExtSet.clear();
|
|
appsExtSet.addAll(appsExtList);
|
|
}
|
|
}
|
|
|
|
public static String getMediaExtList() {
|
|
synchronized (mediaExtSet) {
|
|
return mediaExtSet.toString();
|
|
}
|
|
}
|
|
|
|
public static void initSupportedHTMLFileExt(List supportedRealtimeFileExtList) {
|
|
synchronized (supportedHTMLFileExt) {
|
|
supportedHTMLFileExt.clear();
|
|
supportedHTMLFileExt.addAll(supportedRealtimeFileExtList);
|
|
}
|
|
}
|
|
|
|
public static boolean HTMLParsableMimeTypesContains(String mimeType) {
|
|
mimeType = normalizeMimeType(mimeType);
|
|
synchronized (supportedHTMLMimeTypes) {
|
|
return supportedHTMLMimeTypes.contains(mimeType);
|
|
}
|
|
}
|
|
|
|
public static boolean supportedHTMLContent(yacyURL url, String mimeType) {
|
|
return HTMLParsableMimeTypesContains(mimeType) && supportedHTMLFileExtContains(url);
|
|
}
|
|
|
|
public static boolean supportedHTMLFileExtContains(yacyURL url) {
|
|
String fileExt = getFileExt(url);
|
|
synchronized (supportedHTMLFileExt) {
|
|
return supportedHTMLFileExt.contains(fileExt);
|
|
}
|
|
}
|
|
|
|
public static String getFileExt(yacyURL url) {
|
|
// getting the file path
|
|
String name = url.getPath();
|
|
|
|
// tetermining last position of / in the file path
|
|
int p = name.lastIndexOf('/');
|
|
if (p != -1) {
|
|
name = name.substring(p);
|
|
}
|
|
|
|
// termining last position of . in file path
|
|
p = name.lastIndexOf('.');
|
|
if (p < 0) return "";
|
|
return name.substring(p + 1);
|
|
}
|
|
|
|
public static boolean mediaExtContains(String mediaExt) {
|
|
if (mediaExt == null) return false;
|
|
mediaExt = mediaExt.trim().toLowerCase();
|
|
|
|
synchronized (supportedHTMLFileExt) {
|
|
if (supportedHTMLFileExt.contains(mediaExt)) return false;
|
|
}
|
|
|
|
if (supportedFileExtContains(mediaExt)) return false;
|
|
|
|
synchronized (mediaExtSet) {
|
|
return mediaExtSet.contains(mediaExt);
|
|
}
|
|
}
|
|
|
|
public static boolean imageExtContains(String imageExt) {
|
|
if (imageExt == null) return false;
|
|
synchronized (imageExtSet) {
|
|
return imageExtSet.contains(imageExt.trim().toLowerCase());
|
|
}
|
|
}
|
|
|
|
public static boolean audioExtContains(String audioExt) {
|
|
if (audioExt == null) return false;
|
|
synchronized (audioExtSet) {
|
|
return audioExtSet.contains(audioExt.trim().toLowerCase());
|
|
}
|
|
}
|
|
|
|
public static boolean videoExtContains(String videoExt) {
|
|
if (videoExt == null) return false;
|
|
synchronized (videoExtSet) {
|
|
return videoExtSet.contains(videoExt.trim().toLowerCase());
|
|
}
|
|
}
|
|
|
|
public static boolean appsExtContains(String appsExt) {
|
|
if (appsExt == null) return false;
|
|
synchronized (appsExtSet) {
|
|
return appsExtSet.contains(appsExt.trim().toLowerCase());
|
|
}
|
|
}
|
|
|
|
public static String getRealCharsetEncoding(String encoding) {
|
|
if ((encoding == null) || (encoding.length() == 0)) return "ISO-8859-1";
|
|
|
|
// trim encoding string
|
|
encoding = encoding.trim();
|
|
|
|
if (encoding.toLowerCase().startsWith("windows") && encoding.length() > 7) {
|
|
char c = encoding.charAt(7);
|
|
if (c == '_') encoding = "windows-" + encoding.substring(8);
|
|
else if ((c >= '0') && (c <= '9')) encoding = "windows-" + encoding.substring(7);
|
|
}
|
|
|
|
if (encoding.toLowerCase().startsWith("iso") && encoding.length() > 3) {
|
|
char c = encoding.charAt(3);
|
|
if (c == '_') encoding = "ISO-" + encoding.substring(4);
|
|
else if ((c >= '0') && (c <= '9')) encoding = "ISO-" + encoding.substring(3);
|
|
}
|
|
|
|
if (encoding.toLowerCase().startsWith("iso") && encoding.length() > 8) {
|
|
char c = encoding.charAt(8);
|
|
if (c == '_') encoding = encoding.substring(0,8) + "-" + encoding.substring(9);
|
|
else if ((c >= '0') && (c <= '9')) encoding = encoding.substring(0,8) + "-" + encoding.substring(8);
|
|
}
|
|
|
|
|
|
// converting cp\d{4} -> windows-\d{4}
|
|
if (encoding.toLowerCase().matches("cp([_-])?125[0-8]")) {
|
|
char c = encoding.charAt(2);
|
|
if (c == '_' || c == '-') encoding = "windows-" + encoding.substring(3);
|
|
else if ((c >= '0') && (c <= '9')) encoding = "windows-" + encoding.substring(2);
|
|
}
|
|
|
|
if (encoding.toLowerCase().matches("gb[_-]?2312([-_]80)?")) {
|
|
encoding = "x-EUC-CN";
|
|
}
|
|
|
|
if (encoding.toLowerCase().matches(".*utf[-_]?8.*")) {
|
|
encoding = "UTF-8";
|
|
}
|
|
|
|
|
|
return encoding;
|
|
}
|
|
|
|
public static String normalizeMimeType(String mimeType) {
|
|
//if (mimeType == null) doMimeTypeAnalysis
|
|
if (mimeType == null) mimeType = "application/octet-stream";
|
|
mimeType = mimeType.trim().toLowerCase();
|
|
|
|
int pos = mimeType.indexOf(';');
|
|
return ((pos < 0) ? mimeType : mimeType.substring(0, pos));
|
|
}
|
|
|
|
public static String getMimeTypeByFileExt(String fileExt) {
|
|
return mimeTypeLookupByFileExt.getProperty(fileExt,"application/octet-stream");
|
|
}
|
|
|
|
public Hashtable getAvailableParserList() {
|
|
return plasmaParser.availableParserList;
|
|
}
|
|
|
|
private static void loadAvailableParserList() {
|
|
try {
|
|
plasmaParser.availableParserList.clear();
|
|
|
|
// getting the current java classpath
|
|
String javaClassPath = System.getProperty("java.class.path");
|
|
|
|
// getting the current package name
|
|
String plasmaParserPkgName = plasmaParser.class.getPackage().getName() + ".parser";
|
|
serverLog.logInfo("PARSER","Searching for additional content parsers in package " + plasmaParserPkgName);
|
|
|
|
// getting an uri to the parser subpackage
|
|
String packageURI = plasmaParser.class.getResource("/"+plasmaParserPkgName.replace('.','/')).toString();
|
|
serverLog.logFine("PARSER", "Parser directory is " + packageURI);
|
|
|
|
// open the parser directory
|
|
File parserDir = new File(new URI(packageURI));
|
|
if ((parserDir == null) || (!parserDir.exists()) || (!parserDir.isDirectory())) return;
|
|
|
|
/*
|
|
* loop through all subdirectories and test if we can
|
|
* find an additional parser class
|
|
*/
|
|
File[] parserDirectories = parserDir.listFiles(parserDirectoryFilter);
|
|
if (parserDirectories == null) return;
|
|
|
|
for (int parserDirNr=0; parserDirNr< parserDirectories.length; parserDirNr++) {
|
|
File currentDir = parserDirectories[parserDirNr];
|
|
serverLog.logFine("PARSER", "Searching in directory " + currentDir.toString());
|
|
|
|
String[] parserClasses = currentDir.list(parserFileNameFilter);
|
|
if (parserClasses == null) continue;
|
|
|
|
for (int parserNr=0; parserNr<parserClasses.length; parserNr++) {
|
|
serverLog.logFine("PARSER", "Testing parser class " + parserClasses[parserNr]);
|
|
String className = parserClasses[parserNr].substring(0,parserClasses[parserNr].indexOf(".class"));
|
|
String fullClassName = plasmaParserPkgName + "." + currentDir.getName() + "." + className;
|
|
try {
|
|
// trying to load the parser class by its name
|
|
Class parserClass = Class.forName(fullClassName);
|
|
Object theParser = parserClass.newInstance();
|
|
if (!(theParser instanceof Parser)) continue;
|
|
|
|
// testing if all needed libx libraries are available
|
|
String[] neededLibx = ((Parser)theParser).getLibxDependences();
|
|
StringBuffer neededLibxBuf = new StringBuffer();
|
|
if (neededLibx != null) {
|
|
for (int libxId=0; libxId < neededLibx.length; libxId++) {
|
|
if (javaClassPath.indexOf(neededLibx[libxId]) == -1) {
|
|
throw new Exception("Missing dependency detected: '" + neededLibx[libxId] + "'.");
|
|
}
|
|
neededLibxBuf.append(neededLibx[libxId])
|
|
.append(",");
|
|
}
|
|
if (neededLibxBuf.length()>0) neededLibxBuf.deleteCharAt(neededLibxBuf.length()-1);
|
|
}
|
|
|
|
// loading the list of mime-types that are supported by this parser class
|
|
Hashtable supportedMimeTypes = ((Parser)theParser).getSupportedMimeTypes();
|
|
|
|
// creating a parser info object
|
|
ParserInfo parserInfo = new ParserInfo();
|
|
parserInfo.parserClass = parserClass;
|
|
parserInfo.parserClassName = fullClassName;
|
|
parserInfo.libxDependencies = neededLibx;
|
|
parserInfo.supportedMimeTypes = supportedMimeTypes;
|
|
parserInfo.parserVersionNr = ((Parser)theParser).getVersion();
|
|
parserInfo.parserName = ((Parser)theParser).getName();
|
|
|
|
Iterator mimeTypeIterator = supportedMimeTypes.keySet().iterator();
|
|
while (mimeTypeIterator.hasNext()) {
|
|
String mimeType = (String) mimeTypeIterator.next();
|
|
availableParserList.put(mimeType,parserInfo );
|
|
serverLog.logInfo("PARSER", "Found functional parser for mimeType '" + mimeType + "'." +
|
|
"\n\tName: " + parserInfo.parserName +
|
|
"\n\tVersion: " + parserInfo.parserVersionNr +
|
|
"\n\tClass: " + parserInfo.parserClassName +
|
|
((neededLibxBuf.length()>0)?"\n\tDependencies: " + neededLibxBuf.toString():""));
|
|
}
|
|
|
|
} catch (Exception e) { /* we can ignore this for the moment */
|
|
serverLog.logWarning("PARSER", "Parser '" + className + "' doesn't work correctly and will be ignored.\n [" + e.getClass().getName() + "]: " + e.getMessage());
|
|
e.printStackTrace();
|
|
} catch (Error e) { /* we can ignore this for the moment */
|
|
serverLog.logWarning("PARSER", "Parser '" + className + "' doesn't work correctly and will be ignored.\n [" + e.getClass().getName() + "]: " + e.getMessage());
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
|
|
} catch (Exception e) {
|
|
serverLog.logSevere("PARSER", "Unable to determine all installed parsers. " + e.getMessage());
|
|
}
|
|
}
|
|
|
|
public void close() {
|
|
// clearing the parser list
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
currentConfig.enabledParserList.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
public plasmaParserDocument parseSource(yacyURL location, String mimeType, String charset, byte[] sourceArray)
|
|
throws InterruptedException, ParserException {
|
|
ByteArrayInputStream byteIn = null;
|
|
try {
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logFine("Parsing '" + location + "' from byte-array");
|
|
|
|
// testing if the resource is not empty
|
|
if (sourceArray == null || sourceArray.length == 0) {
|
|
String errorMsg = "No resource content available (1).";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_NOT_PARSEABLE_NO_CONTENT);
|
|
}
|
|
|
|
// creating an InputStream
|
|
byteIn = new ByteArrayInputStream(sourceArray);
|
|
|
|
// parsing the temp file
|
|
return parseSource(location, mimeType, charset, sourceArray.length, byteIn);
|
|
|
|
} catch (Exception e) {
|
|
// Interrupted- and Parser-Exceptions should pass through
|
|
if (e instanceof InterruptedException) throw (InterruptedException) e;
|
|
if (e instanceof ParserException) throw (ParserException) e;
|
|
|
|
// log unexpected error
|
|
this.theLogger.logSevere("Unexpected exception in parseSource from byte-array: " + e.getMessage(), e);
|
|
throw new ParserException("Unexpected exception while parsing " + location,location, e);
|
|
} finally {
|
|
if (byteIn != null) try { byteIn.close(); } catch (Exception ex){/* ignore this */}
|
|
}
|
|
|
|
}
|
|
|
|
public plasmaParserDocument parseSource(yacyURL location, String theMimeType, String theDocumentCharset, File sourceFile) throws InterruptedException, ParserException {
|
|
|
|
BufferedInputStream sourceStream = null;
|
|
try {
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logFine("Parsing '" + location + "' from file");
|
|
|
|
// testing if the resource is not empty
|
|
if (!(sourceFile.exists() && sourceFile.canRead() && sourceFile.length() > 0)) {
|
|
String errorMsg = sourceFile.exists() ? "Empty resource file." : "No resource content available (2).";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_NOT_PARSEABLE_NO_CONTENT);
|
|
}
|
|
|
|
// create a new InputStream
|
|
sourceStream = new BufferedInputStream(new FileInputStream(sourceFile));
|
|
|
|
// parsing the data
|
|
return this.parseSource(location, theMimeType, theDocumentCharset, sourceFile.length(), sourceStream);
|
|
|
|
} catch (Exception e) {
|
|
// Interrupted- and Parser-Exceptions should pass through
|
|
if (e instanceof InterruptedException) throw (InterruptedException) e;
|
|
if (e instanceof ParserException) throw (ParserException) e;
|
|
|
|
// log unexpected error
|
|
this.theLogger.logSevere("Unexpected exception in parseSource from File: " + e.getMessage(), e);
|
|
throw new ParserException("Unexpected exception while parsing " + location,location, e);
|
|
} finally {
|
|
if (sourceStream != null) try { sourceStream.close(); } catch (Exception ex){/* ignore this */}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* To parse a resource from an {@link InputStream}
|
|
* @param location the URL of the resource
|
|
* @param theMimeType the resource mimetype (<code>null</code> if unknown)
|
|
* @param theDocumentCharset the charset of the resource (<code>null</code> if unknown)
|
|
* @param contentLength the content length of the resource (<code>-1</code> if unknown)
|
|
* @param sourceStream an {@link InputStream} containing the resource body
|
|
* @return the parsed {@link plasmaParserDocument document}
|
|
* @throws InterruptedException
|
|
* @throws ParserException
|
|
*/
|
|
public plasmaParserDocument parseSource(yacyURL location, String theMimeType, String theDocumentCharset, long contentLength, InputStream sourceStream) throws InterruptedException, ParserException {
|
|
Parser theParser = null;
|
|
String mimeType = null;
|
|
try {
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logFine("Parsing '" + location + "' from stream");
|
|
|
|
// getting the mimetype of the document
|
|
mimeType = normalizeMimeType(theMimeType);
|
|
|
|
// getting the file extension of the document
|
|
String fileExt = getFileExt(location);
|
|
|
|
// getting the charset of the document
|
|
// TODO: do a charset detection here ....
|
|
String documentCharset = getRealCharsetEncoding(theDocumentCharset);
|
|
|
|
// testing if parsing is supported for this resource
|
|
if (!plasmaParser.supportedContent(location,mimeType)) {
|
|
String errorMsg = "No parser available to parse mimetype '" + mimeType + "'";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_WRONG_MIMETYPE_OR_EXT);
|
|
}
|
|
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logInfo("Parsing " + location + " with mimeType '" + mimeType +
|
|
"' and file extension '" + fileExt + "'.");
|
|
|
|
// getting the correct parser for the given mimeType
|
|
theParser = this.getParser(mimeType);
|
|
|
|
// if a parser was found we use it ...
|
|
plasmaParserDocument doc = null;
|
|
if (theParser != null) {
|
|
// set the content length of the resource
|
|
theParser.setContentLength(contentLength);
|
|
// parse the resource
|
|
doc = theParser.parse(location, mimeType,documentCharset,sourceStream);
|
|
} else if (HTMLParsableMimeTypesContains(mimeType)) {
|
|
doc = parseHtml(location, mimeType, documentCharset, sourceStream);
|
|
} else {
|
|
String errorMsg = "No parser available to parse mimetype '" + mimeType + "'";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_WRONG_MIMETYPE_OR_EXT);
|
|
}
|
|
|
|
// check result
|
|
if (doc == null) {
|
|
String errorMsg = "Unexpected error. Parser returned null.";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location);
|
|
}
|
|
return doc;
|
|
|
|
} catch (UnsupportedEncodingException e) {
|
|
String errorMsg = "Unsupported charset encoding: " + e.getMessage();
|
|
this.theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_UNSUPPORTED_CHARSET);
|
|
} catch (Exception e) {
|
|
// Interrupted- and Parser-Exceptions should pass through
|
|
if (e instanceof InterruptedException) throw (InterruptedException) e;
|
|
if (e instanceof ParserException) throw (ParserException) e;
|
|
|
|
// log unexpected error
|
|
String errorMsg = "Unexpected exception. " + e.getMessage();
|
|
this.theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg, e);
|
|
throw new ParserException(errorMsg,location,e);
|
|
|
|
} finally {
|
|
if (theParser != null) {
|
|
theParser = null; // delete object
|
|
}
|
|
}
|
|
}
|
|
|
|
private plasmaParserDocument parseHtml(yacyURL location, String mimeType, String documentCharset, InputStream sourceStream) throws IOException, ParserException {
|
|
|
|
// make a scraper and transformer
|
|
htmlFilterInputStream htmlFilter = new htmlFilterInputStream(sourceStream,documentCharset,location,null,false);
|
|
String charset = htmlFilter.detectCharset();
|
|
if (charset == null) {
|
|
charset = documentCharset;
|
|
} else {
|
|
charset = getRealCharsetEncoding(charset);
|
|
}
|
|
|
|
if (!documentCharset.equalsIgnoreCase(charset)) {
|
|
this.theLogger.logInfo("Charset transformation needed from '" + documentCharset + "' to '" + charset + "'");
|
|
}
|
|
|
|
// parsing the content
|
|
htmlFilterContentScraper scraper = new htmlFilterContentScraper(location);
|
|
htmlFilterWriter writer = new htmlFilterWriter(null,null,scraper,null,false);
|
|
serverFileUtils.copy(htmlFilter, writer, charset);
|
|
writer.close();
|
|
//OutputStream hfos = new htmlFilterOutputStream(null, scraper, null, false);
|
|
//serverFileUtils.copy(sourceFile, hfos);
|
|
//hfos.close();
|
|
if (writer.binarySuspect()) {
|
|
String errorMsg = "Binary data found in resource";
|
|
this.theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location);
|
|
}
|
|
return transformScraper(location, mimeType, documentCharset, scraper);
|
|
}
|
|
|
|
public plasmaParserDocument transformScraper(yacyURL location, String mimeType, String charSet, htmlFilterContentScraper scraper) {
|
|
try {
|
|
String[] sections = new String[scraper.getHeadlines(1).length + scraper.getHeadlines(2).length + scraper.getHeadlines(3).length + scraper.getHeadlines(4).length];
|
|
int p = 0;
|
|
for (int i = 1; i <= 4; i++) for (int j = 0; j < scraper.getHeadlines(i).length; j++) sections[p++] = scraper.getHeadlines(i)[j];
|
|
plasmaParserDocument ppd = new plasmaParserDocument(
|
|
new yacyURL(location.toNormalform(true, true), null),
|
|
mimeType,
|
|
charSet,
|
|
scraper.getKeywords(),
|
|
scraper.getTitle(),
|
|
scraper.getAuthor(),
|
|
sections,
|
|
scraper.getDescription(),
|
|
scraper.getText(),
|
|
scraper.getAnchors(),
|
|
scraper.getImages());
|
|
//scraper.close();
|
|
ppd.setFavicon(scraper.getFavicon());
|
|
return ppd;
|
|
} catch (MalformedURLException e) {
|
|
//e.printStackTrace();
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function is used to determine the parser class that should be used for a given
|
|
* mimetype ...
|
|
* @param mimeType MIME-Type of the resource
|
|
* @return the {@link Parser}-class that is supposed to parse the resource of
|
|
* the given MIME-Type
|
|
*/
|
|
private Parser getParser(String mimeType) {
|
|
|
|
mimeType = normalizeMimeType(mimeType);
|
|
try {
|
|
|
|
// determining the proper parser class name for the mimeType
|
|
String parserClassName = null;
|
|
ParserInfo parserInfo = null;
|
|
synchronized (plasmaParser.availableParserList) {
|
|
if (plasmaParser.availableParserList.containsKey(mimeType)) {
|
|
parserInfo = (ParserInfo)plasmaParser.availableParserList.get(mimeType);
|
|
parserClassName = parserInfo.parserClassName;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// fetching a new parser object from pool
|
|
Parser theParser = makeParser(parserClassName);
|
|
|
|
// checking if the created parser really supports the given mimetype
|
|
Hashtable supportedMimeTypes = theParser.getSupportedMimeTypes();
|
|
if ((supportedMimeTypes != null) && (supportedMimeTypes.containsKey(mimeType))) {
|
|
parserInfo.incUsageCounter();
|
|
return theParser;
|
|
}
|
|
|
|
} catch (Exception e) {
|
|
System.err.println("ERROR: Unable to load the correct parser for type " + mimeType);
|
|
}
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
static Map allReflinks(Set links) {
|
|
// links is either a Set of Strings (with urls) or htmlFilterImageEntries
|
|
// we find all links that are part of a reference inside a url
|
|
HashMap v = new HashMap();
|
|
Iterator i = links.iterator();
|
|
Object o;
|
|
String url;
|
|
int pos;
|
|
loop: while (i.hasNext()) {
|
|
o = i.next();
|
|
if (o instanceof String) url = (String) o;
|
|
else if (o instanceof htmlFilterImageEntry) url = ((htmlFilterImageEntry) o).url().toNormalform(true, true);
|
|
else {
|
|
assert false;
|
|
continue;
|
|
}
|
|
if ((pos = url.toLowerCase().indexOf("http://",7)) > 0) {
|
|
i.remove();
|
|
url = url.substring(pos);
|
|
while ((pos = url.toLowerCase().indexOf("http://",7)) > 0) url = url.substring(pos);
|
|
if (!(v.containsKey(url))) v.put(url, "ref");
|
|
continue loop;
|
|
}
|
|
if ((pos = url.toLowerCase().indexOf("/www.",7)) > 0) {
|
|
i.remove();
|
|
url = "http:/" + url.substring(pos);
|
|
while ((pos = url.toLowerCase().indexOf("/www.",7)) > 0) url = "http:/" + url.substring(pos);
|
|
if (!(v.containsKey(url))) v.put(url, "ref");
|
|
continue loop;
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static Map allSubpaths(Set links) {
|
|
// links is either a Set of Strings (urls) or a Set of htmlFilterImageEntries
|
|
HashMap v = new HashMap();
|
|
Iterator i = links.iterator();
|
|
Object o;
|
|
String url;
|
|
int pos;
|
|
while (i.hasNext()) {
|
|
o = i.next();
|
|
if (o instanceof String) url = (String) o;
|
|
else if (o instanceof htmlFilterImageEntry) url = ((htmlFilterImageEntry) o).url().toNormalform(true, true);
|
|
else {
|
|
assert false;
|
|
continue;
|
|
}
|
|
if (url.endsWith("/")) url = url.substring(0, url.length() - 1);
|
|
pos = url.lastIndexOf("/");
|
|
while (pos > 8) {
|
|
url = url.substring(0, pos + 1);
|
|
if (!(v.containsKey(url))) v.put(url, "sub");
|
|
url = url.substring(0, pos);
|
|
pos = url.lastIndexOf("/");
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
//javac -classpath lib/commons-collections.jar:lib/commons-pool-1.2.jar -sourcepath source source/de/anomic/plasma/plasmaParser.java
|
|
//java -cp source:lib/commons-collections.jar:lib/commons-pool-1.2.jar de.anomic.plasma.plasmaParser bug.html bug.out
|
|
httpc remote = null;
|
|
try {
|
|
Object content = null;
|
|
yacyURL contentURL = null;
|
|
long contentLength = -1;
|
|
String contentMimeType = "application/octet-stream";
|
|
String charSet = "UTF-8";
|
|
|
|
if (args.length < 2) {
|
|
System.err.println("Usage: java de.anomic.plasma.plasmaParser (-f filename|-u URL) [-m mimeType]");
|
|
}
|
|
|
|
String mode = args[0];
|
|
if (mode.equalsIgnoreCase("-f")) {
|
|
content = new File(args[1]);
|
|
contentURL = new yacyURL((File)content);
|
|
} else if (mode.equalsIgnoreCase("-u")) {
|
|
contentURL = new yacyURL(args[1], null);
|
|
|
|
// downloading the document content
|
|
remote = new httpc(
|
|
contentURL.getHost(),
|
|
contentURL.getHost(),
|
|
contentURL.getPort(),
|
|
5000,
|
|
contentURL.getProtocol().equalsIgnoreCase("https"),
|
|
null,
|
|
null, null);
|
|
|
|
httpc.response res = remote.GET(contentURL.getFile(), null);
|
|
if (res.statusCode != 200) {
|
|
System.err.println("Unable to download " + contentURL + ". " + res.status);
|
|
return;
|
|
}
|
|
content = res.getContentInputStream();
|
|
contentMimeType = res.responseHeader.mime();
|
|
charSet = res.responseHeader.getCharacterEncoding();
|
|
contentLength = res.responseHeader.contentLength();
|
|
remote.close();
|
|
}
|
|
|
|
if ((args.length >= 4)&&(args[2].equalsIgnoreCase("-m"))) {
|
|
contentMimeType = args[3];
|
|
}
|
|
|
|
if ((args.length >= 6)&&(args[4].equalsIgnoreCase("-c"))) {
|
|
charSet = args[5];
|
|
}
|
|
|
|
// creating a plasma parser
|
|
plasmaParser theParser = new plasmaParser();
|
|
|
|
// configuring the html parsable mimeTypes
|
|
plasmaParser.initHTMLParsableMimeTypes("application/xhtml+xml,text/html,text/plain,text/sgml");
|
|
|
|
// parsing the content
|
|
plasmaParserDocument document = null;
|
|
if (content instanceof byte[]) {
|
|
document = theParser.parseSource(contentURL, contentMimeType, charSet, (byte[])content);
|
|
} else if (content instanceof File) {
|
|
document = theParser.parseSource(contentURL, contentMimeType, charSet, (File)content);
|
|
} else if (content instanceof InputStream) {
|
|
document = theParser.parseSource(contentURL, contentMimeType, charSet, contentLength, (InputStream)content);
|
|
}
|
|
|
|
// printing out all parsed sentences
|
|
if (document != null) {
|
|
System.out.print("Document titel: ");
|
|
System.out.println(document.getTitle());
|
|
|
|
// found text
|
|
final Iterator sentences = document.getSentences(false);
|
|
int i = 0;
|
|
if (sentences != null) while (sentences.hasNext()) {
|
|
System.out.print("line " + i + ": ");
|
|
System.out.println(((StringBuffer) sentences.next()).toString());
|
|
i++;
|
|
}
|
|
|
|
// found links
|
|
int anchorNr = 0;
|
|
Map anchors = document.getAnchors();
|
|
Iterator anchorIter = anchors.keySet().iterator();
|
|
while (anchorIter.hasNext()) {
|
|
String key = (String) anchorIter.next();
|
|
System.out.println("URL " + anchorNr + ":\t" + key + " | " + anchors.get(key));
|
|
anchorNr++;
|
|
}
|
|
document.close();
|
|
}
|
|
} catch (Exception e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
|
|
public static boolean supportedContent(yacyURL url, String mimeType) {
|
|
if (url == null) throw new NullPointerException();
|
|
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
if (currentConfig.supportedContent(url, mimeType)) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static boolean supportedContent(String parserMode, yacyURL url, String mimeType) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
if (url == null) throw new NullPointerException();
|
|
|
|
if (parserMode.equals(PARSER_MODE_IMAGE)) return true;
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
return (config == null)?false:config.supportedContent(url, mimeType);
|
|
}
|
|
|
|
public static void initParseableMimeTypes(String parserMode, String configStr) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
if (config == null) {
|
|
config = new plasmaParserConfig(parserMode);
|
|
parserConfigList.put(parserMode, config);
|
|
}
|
|
config.initParseableMimeTypes(configStr);
|
|
}
|
|
|
|
public static String[] setEnabledParserList(String parserMode, Set mimeTypeSet) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
if (config == null) {
|
|
config = new plasmaParserConfig(parserMode);
|
|
parserConfigList.put(parserMode, config);
|
|
}
|
|
return config.setEnabledParserList(mimeTypeSet);
|
|
}
|
|
|
|
public static boolean supportedFileExtContains(String fileExt) {
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
if (currentConfig.supportedFileExtContains(fileExt)) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static boolean supportedMimeTypesContains(String mimeType) {
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
if (currentConfig.supportedMimeTypesContains(mimeType)) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static Parser makeParser(Object name) throws Exception {
|
|
|
|
if (!(name instanceof String))
|
|
throw new IllegalArgumentException("The object key must be of type string.");
|
|
|
|
// loading class by name
|
|
Class moduleClass = Class.forName((String)name);
|
|
|
|
// instantiating class
|
|
Parser theParser = (Parser) moduleClass.newInstance();
|
|
|
|
// setting logger that should by used
|
|
String parserShortName = ((String)name).substring("de.anomic.plasma.parser.".length(),((String)name).lastIndexOf("."));
|
|
|
|
serverLog theLogger = new serverLog("PARSER." + parserShortName.toUpperCase());
|
|
theParser.setLogger(theLogger);
|
|
|
|
return theParser;
|
|
}
|
|
|
|
}
|