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.
251 lines
9.5 KiB
251 lines
9.5 KiB
// htmlParser.java
|
|
// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
|
|
// first published 09.07.2009 on http://yacy.net
|
|
//
|
|
// This is a part of YaCy, a peer-to-peer based web search engine
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// 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 net.yacy.document.parser;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.nio.charset.Charset;
|
|
import java.nio.charset.IllegalCharsetNameException;
|
|
import java.nio.charset.UnsupportedCharsetException;
|
|
import java.util.HashSet;
|
|
import java.util.Set;
|
|
|
|
import net.yacy.document.AbstractParser;
|
|
import net.yacy.document.Document;
|
|
import net.yacy.document.Idiom;
|
|
import net.yacy.document.ParserException;
|
|
import net.yacy.document.parser.html.ContentScraper;
|
|
import net.yacy.document.parser.html.ScraperInputStream;
|
|
import net.yacy.document.parser.html.TransformerWriter;
|
|
import net.yacy.kelondro.data.meta.DigestURI;
|
|
import net.yacy.kelondro.util.FileUtils;
|
|
|
|
|
|
public class htmlParser extends AbstractParser implements Idiom {
|
|
|
|
/**
|
|
* a list of mime types that are supported by this parser class
|
|
* @see #getSupportedMimeTypes()
|
|
*/
|
|
public static final Set<String> SUPPORTED_MIME_TYPES = new HashSet<String>();
|
|
public static final Set<String> SUPPORTED_EXTENSIONS = new HashSet<String>();
|
|
static {
|
|
SUPPORTED_EXTENSIONS.add("htm");
|
|
SUPPORTED_EXTENSIONS.add("html");
|
|
SUPPORTED_EXTENSIONS.add("shtml");
|
|
SUPPORTED_EXTENSIONS.add("xhtml");
|
|
SUPPORTED_EXTENSIONS.add("php");
|
|
SUPPORTED_EXTENSIONS.add("php3");
|
|
SUPPORTED_EXTENSIONS.add("php4");
|
|
SUPPORTED_EXTENSIONS.add("php5");
|
|
SUPPORTED_EXTENSIONS.add("cfm");
|
|
SUPPORTED_EXTENSIONS.add("asp");
|
|
SUPPORTED_EXTENSIONS.add("aspx");
|
|
SUPPORTED_EXTENSIONS.add("txt");
|
|
SUPPORTED_EXTENSIONS.add("jsp");
|
|
SUPPORTED_EXTENSIONS.add("pl");
|
|
SUPPORTED_EXTENSIONS.add("py");
|
|
SUPPORTED_MIME_TYPES.add("text/html");
|
|
SUPPORTED_MIME_TYPES.add("text/xhtml+xml");
|
|
SUPPORTED_MIME_TYPES.add("application/xhtml+xml");
|
|
SUPPORTED_MIME_TYPES.add("application/x-httpd-php");
|
|
SUPPORTED_MIME_TYPES.add("text/plain");
|
|
SUPPORTED_MIME_TYPES.add("text/sgml");
|
|
SUPPORTED_MIME_TYPES.add("text/csv");
|
|
}
|
|
|
|
public htmlParser() {
|
|
super("HTML Parser");
|
|
}
|
|
|
|
@Override
|
|
public Document parse(
|
|
final DigestURI location,
|
|
final String mimeType,
|
|
final String documentCharset,
|
|
final InputStream sourceStream) throws ParserException, InterruptedException {
|
|
|
|
// make a scraper and transformer
|
|
final ScraperInputStream htmlFilter = new ScraperInputStream(sourceStream,documentCharset,location,null,false);
|
|
String charset = null;
|
|
try {
|
|
charset = htmlFilter.detectCharset();
|
|
} catch (IOException e1) {
|
|
throw new ParserException("Charset error:" + e1.getMessage(), location);
|
|
}
|
|
if (charset == null) {
|
|
charset = documentCharset;
|
|
} else {
|
|
charset = patchCharsetEncoding(charset);
|
|
}
|
|
|
|
if (!documentCharset.equalsIgnoreCase(charset)) {
|
|
theLogger.logInfo("Charset transformation needed from '" + documentCharset + "' to '" + charset + "' for URL = " + location.toNormalform(true, true));
|
|
}
|
|
|
|
Charset c;
|
|
try {
|
|
c = Charset.forName(charset);
|
|
} catch (IllegalCharsetNameException e) {
|
|
c = Charset.defaultCharset();
|
|
} catch (UnsupportedCharsetException e) {
|
|
c = Charset.defaultCharset();
|
|
}
|
|
|
|
// parsing the content
|
|
final ContentScraper scraper = new ContentScraper(location);
|
|
final TransformerWriter writer = new TransformerWriter(null,null,scraper,null,false);
|
|
try {
|
|
FileUtils.copy(htmlFilter, writer, c);
|
|
writer.close();
|
|
} catch (IOException e) {
|
|
throw new ParserException("IO error:" + e.getMessage(), location);
|
|
}
|
|
//OutputStream hfos = new htmlFilterOutputStream(null, scraper, null, false);
|
|
//serverFileUtils.copy(sourceFile, hfos);
|
|
//hfos.close();
|
|
if (writer.binarySuspect()) {
|
|
final String errorMsg = "Binary data found in resource";
|
|
theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location);
|
|
}
|
|
return transformScraper(location, mimeType, documentCharset, scraper);
|
|
}
|
|
|
|
private static Document transformScraper(final DigestURI location, final String mimeType, final String charSet, final ContentScraper scraper) {
|
|
final 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];
|
|
final Document ppd = new Document(
|
|
location,
|
|
mimeType,
|
|
charSet,
|
|
scraper.getContentLanguages(),
|
|
scraper.getKeywords(),
|
|
scraper.getTitle(),
|
|
scraper.getAuthor(),
|
|
scraper.getPublisher(),
|
|
sections,
|
|
scraper.getDescription(),
|
|
scraper.getText(),
|
|
scraper.getAnchors(),
|
|
scraper.getImages(),
|
|
scraper.indexingDenied());
|
|
//scraper.close();
|
|
ppd.setFavicon(scraper.getFavicon());
|
|
return ppd;
|
|
}
|
|
|
|
|
|
/**
|
|
* some html authors use wrong encoding names, either because they don't know exactly what they
|
|
* are doing or they produce a type. Many times, the upper/downcase scheme of the name is fuzzy
|
|
* This method patches wrong encoding names. The correct names are taken from
|
|
* http://www.iana.org/assignments/character-sets
|
|
* @param encoding
|
|
* @return patched encoding name
|
|
*/
|
|
public static String patchCharsetEncoding(String encoding) {
|
|
|
|
// return the system default encoding
|
|
if ((encoding == null) || (encoding.length() < 3)) return Charset.defaultCharset().name();
|
|
|
|
// trim encoding string
|
|
encoding = encoding.trim();
|
|
|
|
// fix upper/lowercase
|
|
encoding = encoding.toUpperCase();
|
|
if (encoding.startsWith("SHIFT")) return "Shift_JIS";
|
|
if (encoding.startsWith("BIG")) return "Big5";
|
|
// all other names but such with "windows" use uppercase
|
|
if (encoding.startsWith("WINDOWS")) encoding = "windows" + encoding.substring(7);
|
|
if (encoding.startsWith("MACINTOSH")) encoding = "MacRoman";
|
|
|
|
// fix wrong fill characters
|
|
encoding = encoding.replaceAll("_", "-");
|
|
|
|
if (encoding.matches("GB[_-]?2312([-_]80)?")) return "GB2312";
|
|
if (encoding.matches(".*UTF[-_]?8.*")) return "UTF-8";
|
|
if (encoding.startsWith("US")) return "US-ASCII";
|
|
if (encoding.startsWith("KOI")) return "KOI8-R";
|
|
|
|
// patch missing '-'
|
|
if (encoding.startsWith("windows") && encoding.length() > 7) {
|
|
final char c = encoding.charAt(7);
|
|
if ((c >= '0') && (c <= '9')) {
|
|
encoding = "windows-" + encoding.substring(7);
|
|
}
|
|
}
|
|
|
|
if (encoding.startsWith("ISO")) {
|
|
// patch typos
|
|
if (encoding.length() > 3) {
|
|
final char c = encoding.charAt(3);
|
|
if ((c >= '0') && (c <= '9')) {
|
|
encoding = "ISO-" + encoding.substring(3);
|
|
}
|
|
}
|
|
if (encoding.length() > 8) {
|
|
final char c = encoding.charAt(8);
|
|
if ((c >= '0') && (c <= '9')) {
|
|
encoding = encoding.substring(0, 8) + "-" + encoding.substring(8);
|
|
}
|
|
}
|
|
}
|
|
|
|
// patch wrong name
|
|
if (encoding.startsWith("ISO-8559")) {
|
|
// popular typo
|
|
encoding = "ISO-8859" + encoding.substring(8);
|
|
}
|
|
|
|
// converting cp\d{4} -> windows-\d{4}
|
|
if (encoding.matches("CP([_-])?125[0-8]")) {
|
|
final char c = encoding.charAt(2);
|
|
if ((c >= '0') && (c <= '9')) {
|
|
encoding = "windows-" + encoding.substring(2);
|
|
} else {
|
|
encoding = "windows" + encoding.substring(2);
|
|
}
|
|
}
|
|
|
|
return encoding;
|
|
}
|
|
|
|
public Set<String> supportedMimeTypes() {
|
|
return SUPPORTED_MIME_TYPES;
|
|
}
|
|
|
|
public Set<String> supportedExtensions() {
|
|
return SUPPORTED_EXTENSIONS;
|
|
}
|
|
|
|
public boolean indexingDenied() {
|
|
return false;
|
|
}
|
|
}
|