mirror of
https://github.com/yacy/yacy_search_server.git
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8100c033a2
This allow large files parsing and preview, while preventing unwanted OutOfMemory errors which are likely to occur when adding to the Solr Index resources larger than configured crawler limits.
585 lines
26 KiB
Java
585 lines
26 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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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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.net.MalformedURLException;
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import java.nio.charset.Charset;
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import java.nio.charset.IllegalCharsetNameException;
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import java.nio.charset.StandardCharsets;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Date;
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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.encoding.ASCII;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.document.id.AnchorURL;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.cora.document.id.MultiProtocolURL;
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import net.yacy.cora.federate.yacy.CacheStrategy;
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import net.yacy.cora.protocol.ClientIdentification;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.cora.util.CommonPattern;
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import net.yacy.crawler.data.Cache;
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import net.yacy.crawler.retrieval.Response;
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import net.yacy.document.Document;
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import net.yacy.document.LibraryProvider;
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import net.yacy.document.Parser;
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import net.yacy.document.SentenceReader;
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import net.yacy.document.Tokenizer;
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import net.yacy.document.WordTokenizer;
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import net.yacy.document.parser.html.CharacterCoding;
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import net.yacy.document.parser.html.IconEntry;
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import net.yacy.document.parser.html.ImageEntry;
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import net.yacy.kelondro.data.meta.URIMetadataNode;
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import net.yacy.search.Switchboard;
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import net.yacy.search.index.Segment;
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import net.yacy.search.query.QueryGoal;
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import net.yacy.search.query.SearchEvent;
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import net.yacy.search.snippet.TextSnippet;
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import net.yacy.server.serverObjects;
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import net.yacy.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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public static final int VIEW_MODE_AS_IFRAME_FROM_CITATION_REPORT = 8;
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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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prop.put("topmenu", sb.getConfigBool("publicTopmenu", true) ? 1 : 0);
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prop.put("moar", 0);
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prop.put("viewMode", VIEW_MODE_NO_TEXT);
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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("showSnippet", 0);
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if (post == null) return prop;
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// get segment
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Segment indexSegment = sb.index;
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final boolean authorized = sb.verifyAuthentication(header);
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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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prop.put("error_vMode-iframeWeb", "0");
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prop.put("error_vMode-iframeCache", "0");
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prop.put("error_vMode-plain", "0");
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prop.put("error_vMode-parsed", "0");
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prop.put("error_vMode-sentences", "0");
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prop.put("error_vMode-words", "0");
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prop.put("error_vMode-links", "0");
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prop.put("error_vMode-iframeCitations", "0");
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final boolean showSnippet = post.get("show", "").equals("Show Snippet");
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final String viewMode = showSnippet ? "sentences" : post.get("viewMode", "sentences");
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prop.put("error_vMode-" + viewMode, "1");
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DigestURL 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", post.get("urlhash", ""));
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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)) {
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prop.authenticationRequired();
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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 DigestURL(MultiProtocolURL.unescape(urlString));
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urlHash = ASCII.String(url.hash());
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pre = post.getBoolean("pre");
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} catch (final MalformedURLException e) {}
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URIMetadataNode urlEntry = null;
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// get the urlEntry that belongs to the url hash
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//boolean ue = urlHash.length() > 0 && indexSegment.exists(ASCII.getBytes(urlHash));
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//if (ue) Log.logInfo("ViewFile", "exists(" + urlHash + ")");
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if (urlHash.length() > 0 && (urlEntry = indexSegment.fulltext().getMetadata(ASCII.getBytes(urlHash))) == null) {
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indexSegment.fulltext().commit(true);
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}
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if (urlHash.length() > 0 && (urlEntry = indexSegment.fulltext().getMetadata(ASCII.getBytes(urlHash))) != null) {
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// get the url that belongs to the entry
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if (urlEntry == null || urlEntry.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 = urlEntry.url();
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descr = urlEntry.dc_title();
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//urlEntry.wordCount();
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size = urlEntry.filesize();
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pre = urlEntry.flags().get(Tokenizer.flag_cat_indexof);
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prop.put("moar", 1);
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prop.putHTML("moar_search", post.get("search",""));
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}
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prop.put("error_inurldb", urlEntry == null ? 0 : 1);
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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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}
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prop.put("url", url.toNormalform(true));
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// loading the resource content as byte array
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prop.put("error_incache", Cache.has(url.hash()) ? 1 : 0);
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Response response = null;
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try {
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ClientIdentification.Agent agent = ClientIdentification.getAgent(post.get("agentName", ClientIdentification.yacyInternetCrawlerAgentName));
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// use sb.loader.requst( , , global=true) to use crawlprofile to allow index update
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response = sb.loader.load(sb.loader.request(url, true, true), authorized ? CacheStrategy.IFEXIST : CacheStrategy.CACHEONLY, Integer.MAX_VALUE, null, agent);
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} catch (final 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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String charsetName = response.getCharacterEncoding();
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try {
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if(charsetName == null) {
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/* Encoding is unknown from response headers : default decode using UTF-8 */
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charsetName = StandardCharsets.UTF_8.name();
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} else if(!Charset.isSupported(charsetName)) {
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/* Encoding is known but not supported on this system : default decode using UTF-8 */
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charsetName = StandardCharsets.UTF_8.name();
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}
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} catch(IllegalCharsetNameException e) {
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/* Encoding is known but charset name is not valid : default decode using UTF-8 */
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charsetName = StandardCharsets.UTF_8.name();
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}
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content = new String(response.getContent(), charsetName);
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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(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_png", 0);
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prop.put("viewMode_html", 0);
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if (response.docType() == Response.DT_IMAGE) {
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prop.put("viewMode_png", 1);
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prop.put("viewMode_png_url", url.toNormalform(true));
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} else {
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prop.put("viewMode_html", 1);
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prop.put("viewMode_html_url", url.toNormalform(true));
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}
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} else if (viewMode.equals("iframeCitations")) {
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prop.put("viewMode", VIEW_MODE_AS_IFRAME_FROM_CITATION_REPORT);
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prop.put("viewMode_url", url.toNormalform(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 = document.getTextString();
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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().length == 0 ? new String[]{""} : 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.toNormalform(false));
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prop.put("viewMode_lat", document.lat());
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prop.put("viewMode_lon", document.lon());
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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 Collection<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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for (final StringBuilder s: sentences) {
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sentence = s.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 Collection<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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StringBuilder token;
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if (sentences != null) {
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// Search word highlighting
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for (final StringBuilder s: sentences) {
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sentence = s.toString();
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WordTokenizer tokens = new WordTokenizer(new SentenceReader(sentence), LibraryProvider.dymLib);
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try {
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while (tokens.hasMoreElements()) {
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token = tokens.nextElement();
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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.toString());
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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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} finally {
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tokens.close();
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tokens = null;
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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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putLinks(prop, wordArray, document);
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}
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// optional: generate snippet
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if (showSnippet) {
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QueryGoal goal = new QueryGoal(post.get("search", ""));
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TextSnippet snippet = new TextSnippet(
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sb.loader,
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urlEntry,
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goal.getIncludeHashes(),
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CacheStrategy.CACHEONLY,
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false,
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SearchEvent.SNIPPET_MAX_LENGTH,
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false);
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String titlestr = urlEntry.dc_title();
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// if title is empty use filename as title
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if (titlestr.isEmpty()) { // if url has no filename, title is still empty (e.g. "www.host.com/" )
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titlestr = urlEntry.url() != null ? urlEntry.url().getFileName() : "";
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}
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final String desc = (snippet == null) ? "" : snippet.descriptionline(goal);
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prop.put("showSnippet_headline", titlestr);
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prop.put("showSnippet_teasertext", desc);
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prop.put("showSnippet", 1);
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}
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// update index with parsed resource if index entry is older or missing
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final long responseSize = response.size();
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if (urlEntry == null || urlEntry.loaddate().before(response.lastModified())) {
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/* Also check resource size is lower than configured crawler limits */
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if (responseSize >= 0
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&& responseSize <= Switchboard.getSwitchboard().loader.protocolMaxFileSize(response.url())) {
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Switchboard.getSwitchboard().toIndexer(response);
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}
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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(true));
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prop.put("error_hash", urlHash);
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prop.put("error_inurldb_hash", urlHash);
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prop.put("error_wordCount", wordCount);
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prop.put("error_firstSeen", "");
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long firstseen = sb.index.getFirstSeenTime(ASCII.getBytes(urlHash));
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prop.put("error_firstSeen", firstseen < 0 ? "" : new Date(firstseen).toString());
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prop.putHTML("error_desc", (descr.isEmpty()) ? " " : 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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if (urlEntry == null) {
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prop.put("error_referrerHash", "");
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prop.put("error_moddate", "");
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prop.put("error_loaddate", "");
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prop.put("error_freshdate", "");
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prop.put("error_hosthash", "");
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prop.putHTML("error_dc_creator", "");
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prop.putHTML("error_dc_publisher", "");
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prop.putHTML("error_dc_subject", "");
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prop.put("error_lat", "");
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prop.put("error_lon", "");
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prop.put("error_language", "");
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prop.put("error_flags", "");
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prop.put("error_wordCount", "");
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prop.put("error_llocal", "");
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prop.put("error_lother", "");
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prop.put("error_limage", "");
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prop.put("error_laudio", "");
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prop.put("error_lvideo", "");
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prop.put("error_lapp", "");
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prop.put("error_collections", "");
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} else {
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prop.put("error_referrerHash", urlEntry.referrerHash());
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prop.put("error_moddate", urlEntry.moddate());
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prop.put("error_loaddate", urlEntry.loaddate());
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prop.put("error_freshdate", urlEntry.freshdate());
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prop.put("error_hosthash", urlEntry.hosthash());
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prop.putHTML("error_dc_creator", urlEntry.dc_creator());
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prop.putHTML("error_dc_publisher", urlEntry.dc_publisher());
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prop.putHTML("error_dc_subject", urlEntry.dc_subject());
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prop.put("error_lat", urlEntry.lat());
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prop.put("error_lon", urlEntry.lon());
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prop.put("error_language", urlEntry.language());
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prop.put("error_flags", urlEntry.flags().toString());
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prop.put("error_wordCount", urlEntry.wordCount());
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prop.put("error_llocal", urlEntry.llocal());
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prop.put("error_lother", urlEntry.lother());
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prop.put("error_limage", urlEntry.limage());
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prop.put("error_laudio", urlEntry.laudio());
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prop.put("error_lvideo", urlEntry.lvideo());
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prop.put("error_lapp", urlEntry.lapp());
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prop.put("error_collections", Arrays.toString(urlEntry.collections()));
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}
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return prop;
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}
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/**
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* Fill prop object with document links.
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* @param prop object to be filled. Must not be null
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* @param wordArray aray of words from word post parameter
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* @param document document to process
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*/
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private static void putLinks(final serverObjects prop, final String[] wordArray, Document document) {
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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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i += putIconsInfos(prop, wordArray, i, document.getIcons().values(), (i % 2 == 0));
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dark = (i % 2 == 0);
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final Map<DigestURL, 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", (entry.alt().isEmpty()) ? " " : markup(wordArray, entry.alt()));
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prop.put("viewMode_links_" + i + "_url", entry.url().toNormalform(true));
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prop.put("viewMode_links_" + i + "_link", markup(wordArray, entry.url().toNormalform(true)));
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if (entry.width() > 0 && entry.height() > 0) {
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prop.put("viewMode_links_" + i + "_rel", entry.width() + "x" + entry.height() + " Pixel");
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} else {
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prop.put("viewMode_links_" + i + "_rel", "");
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}
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prop.put("viewMode_links_" + i + "_name", "");
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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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|
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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.isEmpty()) 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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words = UTF8.decodeURL(words);
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if (words.indexOf(' ',0) >= 0) return CommonPattern.SPACES.split(words);
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if (words.indexOf(',',0) >= 0) return CommonPattern.COMMA.split(words);
|
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if (words.indexOf('+',0) >= 0) return words.split("\\+");
|
|
w = new String[1];
|
|
w[0] = words;
|
|
return w;
|
|
}
|
|
|
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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) {
|
|
int j = 0;
|
|
for (String currentWord : wordArray) {
|
|
currentWord = currentWord.trim();
|
|
// TODO: replace upper-/lowercase words as well
|
|
message = message.replaceAll(currentWord,
|
|
"<span class=\"" + HIGHLIGHT_CSS + ((j++ % MAX_HIGHLIGHTS) + 1) + "\">" +
|
|
currentWord +
|
|
"</span>");
|
|
}
|
|
}
|
|
return message;
|
|
}
|
|
|
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/**
|
|
* Fill prop object with media links.
|
|
* @param prop object ot be filled
|
|
* @param wordArray words array
|
|
* @param c current links count
|
|
* @param media media links
|
|
* @param type type of media link
|
|
* @param dark current result line style
|
|
* @return number of links added to prop
|
|
*/
|
|
private static int putMediaInfo(
|
|
final serverObjects prop,
|
|
final String[] wordArray,
|
|
int c,
|
|
final Map<AnchorURL, String> media,
|
|
final String type,
|
|
boolean dark) {
|
|
int i = 0;
|
|
for (final Map.Entry<AnchorURL, String> entry : media.entrySet()) {
|
|
final String name = entry.getKey().getNameProperty(); // the name attribute
|
|
final String rel = entry.getKey().getRelProperty(); // the rel-attribute
|
|
final String text = entry.getKey().getTextProperty(); // the text between the <a></a> tag
|
|
|
|
prop.put("viewMode_links_" + c + "_nr", c);
|
|
prop.put("viewMode_links_" + c + "_dark", ((dark) ? 1 : 0));
|
|
prop.putHTML("viewMode_links_" + c + "_type", type);
|
|
prop.put("viewMode_links_" + c + "_text", text);
|
|
prop.put("viewMode_links_" + c + "_link", markup(wordArray, entry.getKey().toNormalform(true)));
|
|
prop.put("viewMode_links_" + c + "_url", entry.getKey().toNormalform(true));
|
|
prop.put("viewMode_links_" + c + "_rel", rel);
|
|
prop.put("viewMode_links_" + c + "_name", name);
|
|
dark = !dark;
|
|
c++;
|
|
i++;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* Fill prop object with icon links.
|
|
* @param prop object ot be filled
|
|
* @param wordArray words array
|
|
* @param c current links count
|
|
* @param icons icon links
|
|
* @param dark current result line style
|
|
* @return number of links added to prop
|
|
*/
|
|
private static int putIconsInfos(
|
|
final serverObjects prop,
|
|
final String[] wordArray,
|
|
int c,
|
|
final Collection<IconEntry> icons,
|
|
boolean dark) {
|
|
int i = 0;
|
|
for (final IconEntry entry : icons) {
|
|
final String name = ""; // the name attribute
|
|
final String rel = entry.relToString(); // the rel-attribute
|
|
final String text = ""; // the text between the <a></a> tag
|
|
|
|
prop.put("viewMode_links_" + c + "_nr", c);
|
|
prop.put("viewMode_links_" + c + "_dark", ((dark) ? 1 : 0));
|
|
prop.putHTML("viewMode_links_" + c + "_type", "icon");
|
|
prop.put("viewMode_links_" + c + "_text", text);
|
|
prop.put("viewMode_links_" + c + "_link", markup(wordArray, entry.getUrl().toNormalform(true)));
|
|
prop.put("viewMode_links_" + c + "_url", entry.getUrl().toNormalform(true));
|
|
prop.put("viewMode_links_" + c + "_rel", rel);
|
|
prop.put("viewMode_links_" + c + "_name", name);
|
|
dark = !dark;
|
|
c++;
|
|
i++;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
}
|