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https://github.com/yacy/yacy_search_server.git
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b6fb239e74
some file types are containers for several files. These containers had been parsed in such a way that the set of resulting parsed content was merged into one single document before parsing. Using this parser infrastructure it is not possible to parse document containers that contain individual files. An example is a rss file where the rss messages can be treated as individual documents with their own url reference. Another example is a surrogate file which was treated with a special operation outside of the parser infrastructure. This commit introduces a redesigned parser interface and a new abstract parser implementation. The new parser interface has now only one entry point and returns always a set of parsed documents. In case of single documents the parser method returns a set of one documents. To be compliant with the new interface, the zip and tar parser had been also completely redesigned. All parsers are now much more simple and cleaner in its structure. The switchboard operations had been extended to operate with sets of parsed files, not single parsed files. additionally, parsing of jar manifest files had been added. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6955 6c8d7289-2bf4-0310-a012-ef5d649a1542
390 lines
17 KiB
Java
390 lines
17 KiB
Java
//ViewFile.java
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//-----------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@yacy.net
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2004
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//last major change: 12.07.2004
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//This program 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
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//GNU General Public License for more details.
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//you must compile this file with
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//javac -classpath .:../Classes Status.java
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//if the shell's current path is HTROOT
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.MalformedURLException;
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import java.net.URLDecoder;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.document.Condenser;
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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.parser.html.CharacterCoding;
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import net.yacy.document.parser.html.ImageEntry;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.data.meta.URIMetadataRow;
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import de.anomic.crawler.CrawlProfile;
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import de.anomic.crawler.retrieval.Response;
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import de.anomic.http.client.Cache;
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import de.anomic.http.server.RequestHeader;
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import de.anomic.search.Segment;
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import de.anomic.search.Segments;
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import de.anomic.search.Switchboard;
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import de.anomic.server.serverObjects;
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import de.anomic.server.serverSwitch;
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public class ViewFile {
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public static final int VIEW_MODE_NO_TEXT = 0;
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public static final int VIEW_MODE_AS_PLAIN_TEXT = 1;
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public static final int VIEW_MODE_AS_PARSED_TEXT = 2;
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public static final int VIEW_MODE_AS_PARSED_SENTENCES = 3;
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public static final int VIEW_MODE_AS_IFRAME_FROM_WEB = 4;
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public static final int VIEW_MODE_AS_IFRAME_FROM_CACHE = 5;
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public static final int VIEW_MODE_AS_LINKLIST = 6;
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public static final int VIEW_MODE_AS_PARSED_WORDS = 7;
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private static final String HIGHLIGHT_CSS = "searchHighlight";
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private static final int MAX_HIGHLIGHTS = 6;
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public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
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final serverObjects prop = new serverObjects();
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final Switchboard sb = (Switchboard)env;
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if (post == null) {
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prop.put("display", 1);
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prop.put("error_display", 0);
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prop.putHTML("error_words", "");
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prop.put("error_vMode-sentences", "1");
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prop.put("error", "1");
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prop.put("url", "");
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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final int display = post.getInt("display", 1);
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// get segment
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Segment indexSegment = null;
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boolean authorized = sb.verifyAuthentication(header, false);
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if (post != null && post.containsKey("segment") && authorized) {
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indexSegment = sb.indexSegments.segment(post.get("segment"));
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} else {
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indexSegment = sb.indexSegments.segment(Segments.Process.PUBLIC);
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}
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prop.put("display", display);
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prop.put("error_display", display);
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if (post.containsKey("words"))
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prop.putHTML("error_words", post.get("words"));
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else {
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prop.putHTML("error_words", "");
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}
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final String viewMode = post.get("viewMode","parsed");
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prop.put("error_vMode-" + viewMode, "1");
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DigestURI url = null;
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String descr = "";
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final int wordCount = 0;
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int size = 0;
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boolean pre = false;
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// get the url hash from which the content should be loaded
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String urlHash = post.get("urlHash", "");
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URIMetadataRow urlEntry = null;
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// get the urlEntry that belongs to the url hash
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if (urlHash.length() > 0 && (urlEntry = indexSegment.urlMetadata().load(urlHash.getBytes(), null, 0)) != null) {
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// get the url that belongs to the entry
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final URIMetadataRow.Components metadata = urlEntry.metadata();
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if ((metadata == null) || (metadata.url() == null)) {
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prop.put("error", "3");
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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url = metadata.url();
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descr = metadata.dc_title();
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//urlEntry.wordCount();
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size = urlEntry.size();
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pre = urlEntry.flags().get(Condenser.flag_cat_indexof);
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}
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prop.put("error_inurldb", urlEntry == null ? 0 : 1);
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// alternatively, get the url simply from a url String
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// this can be used as a simple tool to test the text parser
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final String urlString = post.get("url", "");
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if (urlString.length() > 0) try {
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// this call forces the peer to download web pages
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// it is therefore protected by the admin password
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if (!sb.verifyAuthentication(header, false)) {
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prop.put("AUTHENTICATE", "admin log-in"); // force log-in
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return prop;
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}
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// define an url by post parameter
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url = new DigestURI(MultiProtocolURI.unescape(urlString), null);
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urlHash = new String(url.hash());
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pre = post.get("pre", "false").equals("true");
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} catch (final MalformedURLException e) {}
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if (url == null) {
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prop.put("error", "1");
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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prop.put("url", "");
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return prop;
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} else {
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prop.put("url", url.toNormalform(false, true));
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}
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// loading the resource content as byte array
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prop.put("error_incache", Cache.has(url) ? 1 : 0);
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Response response = null;
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try {
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response = sb.loader.load(sb.loader.request(url, true, false), authorized ? CrawlProfile.CacheStrategy.IFEXIST : CrawlProfile.CacheStrategy.CACHEONLY, Long.MAX_VALUE);
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} catch (IOException e) {
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prop.put("error", "4");
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prop.put("error_errorText", "error loading resource: " + e.getMessage());
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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if (response == null) {
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prop.put("error", "4");
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prop.put("error_errorText", "No resource available");
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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final String[] wordArray = wordArray(post.get("words", null));
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if (viewMode.equals("plain")) {
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// TODO: how to handle very large files here ?
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String content;
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try {
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content = new String(response.getContent(), "UTF-8");
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} catch (final Exception e) {
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prop.put("error", "4");
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prop.putHTML("error_errorText", e.getMessage());
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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prop.put("error", "0");
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prop.put("viewMode", VIEW_MODE_AS_PLAIN_TEXT);
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prop.put("viewMode_plainText", markup(wordArray, content).replaceAll("\n", "<br />").replaceAll("\t", " "));
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} else if (viewMode.equals("iframeWeb")) {
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prop.put("viewMode", VIEW_MODE_AS_IFRAME_FROM_WEB);
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prop.put("viewMode_url", url.toNormalform(false, true));
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} else if (viewMode.equals("iframeCache")) {
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prop.put("viewMode", VIEW_MODE_AS_IFRAME_FROM_CACHE);
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prop.put("viewMode_url", url.toNormalform(false, true));
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} else if (viewMode.equals("parsed") || viewMode.equals("sentences") || viewMode.equals("words") || viewMode.equals("links")) {
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// parsing the resource content
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Document document = null;
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try {
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document = Document.mergeDocuments(response.url(), response.getMimeType(), response.parse());
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if (document == null) {
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prop.put("error", "5");
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prop.put("error_errorText", "Unknown error");
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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} catch (final Parser.Failure e) {
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prop.put("error", "5");
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prop.putHTML("error_errorText", e.getMessage());
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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return prop;
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}
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if (viewMode.equals("parsed")) {
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final String content = new String(document.getTextBytes());
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// content = wikiCode.replaceHTML(content); // added by Marc Nause
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prop.put("viewMode", VIEW_MODE_AS_PARSED_TEXT);
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prop.put("viewMode_title", document.dc_title());
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prop.put("viewMode_creator", document.dc_creator());
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prop.put("viewMode_subject", document.dc_subject(','));
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prop.put("viewMode_description", document.dc_description());
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prop.put("viewMode_publisher", document.dc_publisher());
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prop.put("viewMode_format", document.dc_format());
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prop.put("viewMode_identifier", document.dc_identifier());
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prop.put("viewMode_source", url.toString());
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prop.put("viewMode_parsedText", markup(wordArray, content).replaceAll("\n", "<br />").replaceAll("\t", " "));
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} else if (viewMode.equals("sentences")) {
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prop.put("viewMode", VIEW_MODE_AS_PARSED_SENTENCES);
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final Iterator<StringBuilder> sentences = document.getSentences(pre);
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boolean dark = true;
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int i = 0;
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String sentence;
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if (sentences != null) {
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// Search word highlighting
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while (sentences.hasNext()) {
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sentence = sentences.next().toString();
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if (sentence.trim().length() > 0) {
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prop.put("viewMode_sentences_" + i + "_nr", i + 1);
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prop.put("viewMode_sentences_" + i + "_text", markup(wordArray, sentence));
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prop.put("viewMode_sentences_" + i + "_dark", dark ? "1" : "0");
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dark = !dark;
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i++;
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}
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}
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}
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prop.put("viewMode_sentences", i);
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} else if (viewMode.equals("words")) {
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prop.put("viewMode", VIEW_MODE_AS_PARSED_WORDS);
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final Iterator<StringBuilder> sentences = document.getSentences(pre);
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boolean dark = true;
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int i = 0;
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String sentence, token;
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if (sentences != null) {
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// Search word highlighting
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while (sentences.hasNext()) {
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sentence = sentences.next().toString();
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Enumeration<StringBuilder> tokens = Condenser.wordTokenizer(sentence, "UTF-8");
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while (tokens.hasMoreElements()) {
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token = tokens.nextElement().toString();
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if (token.length() > 0) {
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prop.put("viewMode_words_" + i + "_nr", i + 1);
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prop.put("viewMode_words_" + i + "_word", token);
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prop.put("viewMode_words_" + i + "_dark", dark ? "1" : "0");
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dark = !dark;
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i++;
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}
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}
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}
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}
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prop.put("viewMode_words", i);
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} else if (viewMode.equals("links")) {
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prop.put("viewMode", VIEW_MODE_AS_LINKLIST);
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boolean dark = true;
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int i = 0;
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i += putMediaInfo(prop, wordArray, i, document.getVideolinks(), "video", (i % 2 == 0));
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i += putMediaInfo(prop, wordArray, i, document.getAudiolinks(), "audio", (i % 2 == 0));
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dark = (i % 2 == 0);
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final HashMap<MultiProtocolURI, ImageEntry> ts = document.getImages();
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final Iterator<ImageEntry> tsi = ts.values().iterator();
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ImageEntry entry;
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while (tsi.hasNext()) {
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entry = tsi.next();
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prop.put("viewMode_links_" + i + "_nr", i);
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prop.put("viewMode_links_" + i + "_dark", dark ? "1" : "0");
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prop.put("viewMode_links_" + i + "_type", "image");
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prop.put("viewMode_links_" + i + "_text", markup(wordArray, entry.alt()));
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prop.put("viewMode_links_" + i + "_url", entry.url().toNormalform(false, true));
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prop.put("viewMode_links_" + i + "_link", markup(wordArray, entry.url().toNormalform(false, true)));
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if (entry.width() > 0 && entry.height() > 0)
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prop.put("viewMode_links_" + i + "_attr", entry.width() + "x" + entry.height() + " Pixel");
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else
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prop.put("viewMode_links_" + i + "_attr", "unknown");
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dark = !dark;
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i++;
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}
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i += putMediaInfo(prop, wordArray, i, document.getApplinks(), "app", (i % 2 == 0));
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i += putMediaInfo(prop, wordArray, i, document.getHyperlinks(), "link", (i % 2 == 0));
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prop.put("viewMode_links", i);
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}
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if (document != null) document.close();
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}
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prop.put("error", "0");
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prop.put("error_url", url.toNormalform(false, true));
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prop.put("error_hash", urlHash);
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prop.put("error_wordCount", wordCount);
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prop.putHTML("error_desc", descr);
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prop.putNum("error_size", size);
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prop.put("error_mimeTypeAvailable", (response.getMimeType() == null) ? "0" : "1");
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prop.put("error_mimeTypeAvailable_mimeType", response.getMimeType());
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return prop;
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}
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private static final String[] wordArray(String words) {
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String[] w = new String[0];
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if (words == null || words.length() == 0) return w;
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if (words.length() > 1 && words.charAt(0) == '[' && words.charAt(words.length() - 1) == ']') {
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words = words.substring(1, words.length() - 1);
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}
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try {
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words = URLDecoder.decode(words, "UTF-8");
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if (words.indexOf(' ') >= 0) return words.split(" ");
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if (words.indexOf(',') >= 0) return words.split(",");
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if (words.indexOf('+') >= 0) return words.split("+");
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w = new String[1];
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w[0] = words;
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} catch (final UnsupportedEncodingException e) {}
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return w;
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}
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private static final String markup(final String[] wordArray, String message) {
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message = CharacterCoding.unicode2html(message, true);
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if (wordArray != null)
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for (int j = 0; j < wordArray.length; j++) {
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final String currentWord = wordArray[j].trim();
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// TODO: replace upper-/lowercase words as well
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message = message.replaceAll(currentWord,
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"<span class=\"" + HIGHLIGHT_CSS + ((j % MAX_HIGHLIGHTS) + 1) + "\">" +
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currentWord +
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"</span>");
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}
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return message;
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}
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private static int putMediaInfo(final serverObjects prop, final String[] wordArray, int c, final Map<MultiProtocolURI, String> media, final String name, boolean dark) {
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final Iterator<Map.Entry<MultiProtocolURI, String>> mi = media.entrySet().iterator();
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Map.Entry<MultiProtocolURI, String> entry;
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int i = 0;
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while (mi.hasNext()) {
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entry = mi.next();
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prop.put("viewMode_links_" + c + "_nr", c);
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prop.put("viewMode_links_" + c + "_dark", ((dark) ? 1 : 0));
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prop.putHTML("viewMode_links_" + c + "_type", name);
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prop.put("viewMode_links_" + c + "_text", markup(wordArray, entry.getValue()));
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prop.put("viewMode_links_" + c + "_link", markup(wordArray, entry.getKey().toNormalform(true, false)));
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prop.put("viewMode_links_" + c + "_url", entry.getKey().toNormalform(true, false));
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prop.putHTML("viewMode_links_" + c + "_attr", "");
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dark = !dark;
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c++;
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i++;
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}
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return i;
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}
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}
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