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https://github.com/yacy/yacy_search_server.git
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b79e06615d
- refactoring of affected classes git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2802 6c8d7289-2bf4-0310-a012-ef5d649a1542
309 lines
14 KiB
Java
309 lines
14 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@anomic.de
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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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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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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.InputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.URLDecoder;
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import java.net.URLEncoder;
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import java.util.Enumeration;
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import de.anomic.data.wikiCode;
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import de.anomic.http.httpHeader;
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import de.anomic.http.httpc;
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import de.anomic.plasma.plasmaCrawlLURLEntry;
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import de.anomic.plasma.plasmaHTCache;
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import de.anomic.plasma.plasmaParserDocument;
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import de.anomic.plasma.plasmaSwitchboard;
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import de.anomic.plasma.cache.IResourceInfo;
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import de.anomic.plasma.crawler.plasmaCrawlerException;
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import de.anomic.plasma.parser.ParserException;
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import de.anomic.server.serverFileUtils;
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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 = 4;
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public static final String[] highlightingColors = new String[] {
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"255,255,100",
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"255,155,155",
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"0,255,0",
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"0,255,255",
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"204,153,0",
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"204,153,255"
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};
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public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
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serverObjects prop = new serverObjects();
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plasmaSwitchboard sb = (plasmaSwitchboard)env;
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if (post != null && post.containsKey("words"))
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try {
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prop.put("error_words",URLEncoder.encode((String) post.get("words"), "UTF-8"));
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} catch (UnsupportedEncodingException e1) {
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// ignore this. this should not occure
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}
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// getting the url hash from which the content should be loaded
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String urlHash = post.get("urlHash","");
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if (urlHash.equals("")) {
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prop.put("error",1);
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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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String viewMode = post.get("viewMode","sentences");
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// getting the urlEntry that belongs to the url hash
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plasmaCrawlLURLEntry urlEntry = null;
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urlEntry = sb.urlPool.loadedURL.load(urlHash, null);
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if (urlEntry == null) {
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prop.put("error",2);
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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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// gettin the url that belongs to the entry
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plasmaCrawlLURLEntry.Components comp = urlEntry.comp();
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if ((comp == null) || (comp.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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// loading the resource content as byte array
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InputStream resource = null;
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long resourceLength = -1;
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IResourceInfo resInfo = null;
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String resMime = null;
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try {
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// trying to load the resource body
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resource = sb.cacheManager.getResourceContentStream(comp.url());
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resourceLength = sb.cacheManager.getResourceContentLength(comp.url());
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// if the resource body was not cached we try to load it from web
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if (resource == null) {
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plasmaHTCache.Entry entry = null;
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try {
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entry = sb.snippetCache.loadResourceFromWeb(comp.url(), 5000, false);
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} catch (plasmaCrawlerException e) {
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prop.put("error",4);
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prop.put("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 (entry != null) {
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resInfo = entry.getDocumentInfo();
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resource = sb.cacheManager.getResourceContentStream(comp.url());
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resourceLength = sb.cacheManager.getResourceContentLength(comp.url());
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}
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if (resource == 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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}
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// try to load resource metadata
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if (resInfo == null) {
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// try to load the metadata from cache
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try {
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resInfo = sb.cacheManager.loadResourceInfo(comp.url());
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} catch (Exception e) { /* ignore this */}
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// if the metadata where not cached try to load it from web
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if (resInfo == null) {
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String protocol = comp.url().getProtocol();
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if (!((protocol.equals("http") || protocol.equals("https")))) {
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prop.put("error",6);
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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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httpHeader responseHeader = httpc.whead(comp.url(),comp.url().getHost(),5000,null,null,sb.remoteProxyConfig);
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if (responseHeader == null) {
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prop.put("error",4);
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prop.put("error_errorText","Unable to load resource metadata.");
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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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try {
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resInfo = sb.cacheManager.getResourceInfoFactory().buildResourceInfoObj(comp.url(), responseHeader);
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} catch (Exception e) {
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prop.put("error",4);
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prop.put("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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resMime = responseHeader.mime();
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}
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} else {
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resMime = resInfo.getMimeType();
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}
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} catch (IOException e) {
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if (resource != null) try { resource.close(); } catch (Exception ex) {/* ignore this */}
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prop.put("error",4);
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prop.put("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("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(serverFileUtils.read(resource),"UTF-8");
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} catch (Exception e) {
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prop.put("error",4);
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prop.put("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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} finally {
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if (resource != null) try { resource.close(); } catch (Exception e) {/* ignore this */}
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}
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content = content.replaceAll("<","<")
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.replaceAll(">",">")
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.replaceAll("\"",""")
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.replaceAll("\n","<br>")
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.replaceAll("\t"," ");
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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",content);
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} else if (viewMode.equals("iframe")) {
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prop.put("viewMode",VIEW_MODE_AS_IFRAME);
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prop.put("viewMode_url",comp.url().toNormalform());
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} else if (viewMode.equals("parsed") || viewMode.equals("sentences")) {
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// parsing the resource content
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plasmaParserDocument document = null;
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try {
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document = sb.snippetCache.parseDocument(comp.url(), resourceLength, resource,resInfo);
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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 (ParserException e) {
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prop.put("error",5);
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prop.put("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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} finally {
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if (resource != null) try { resource.close(); } catch (Exception e) {/* ignore this */}
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}
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resMime = document.getMimeType();
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if (viewMode.equals("parsed")) {
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String content = new String(document.getTextBytes());
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content = wikiCode.replaceHTML(content); //added by Marc Nause
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content = content.replaceAll("\n","<br>")
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.replaceAll("\t"," ");
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prop.put("viewMode",VIEW_MODE_AS_PARSED_TEXT);
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prop.put("viewMode_parsedText",content);
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} else {
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prop.put("viewMode",VIEW_MODE_AS_PARSED_SENTENCES);
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final Enumeration sentences = document.getSentences(null); // FIXME: apply correct charset
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boolean dark = true;
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int i = 0;
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if (sentences != null) while (sentences.hasMoreElements()) {
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String currentSentence = wikiCode.replaceHTML((String) sentences.nextElement());
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// Search word highlighting
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String words = post.get("words",null);
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if (words != null) {
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try {
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words = URLDecoder.decode(words,"UTF-8");
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} catch (UnsupportedEncodingException e) {}
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String[] wordArray = words.substring(1,words.length()-1).split(",");
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for (int j=0; j < wordArray.length; j++) {
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String currentWord = wordArray[j].trim();
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currentSentence = currentSentence.replaceAll(currentWord,
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"<b style=\"color: black; background-color: rgb(" + highlightingColors[j%6] + ");\">" + currentWord + "</b>");
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}
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}
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prop.put("viewMode_sentences_" + i + "_nr",Integer.toString(i+1));
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prop.put("viewMode_sentences_" + i + "_text",currentSentence);
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prop.put("viewMode_sentences_" + i + "_dark",((dark) ? 1 : 0) ); dark=!dark;
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i++;
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}
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prop.put("viewMode_sentences", 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", comp.url().toNormalform());
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prop.put("error_hash", urlHash);
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prop.put("error_wordCount", Integer.toString(urlEntry.wordCount()));
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prop.put("error_desc", comp.descr());
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prop.put("error_size", urlEntry.size());
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prop.put("error_mimeType", resMime);
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return prop;
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}
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}
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