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a603c4d5e8
yacy_search_server/htroot/ViewFile.java
orbiter 109ed0a0bb - cleaned up code; removed methods to write the old data structures 
- added an assortment importer. the old database structures can
  be imported with
  java -classpath classes yacy -migrateassortments
- modified wordmigration. The indexes from WORDS are now imported
  to the collection database. The call is
  java -classpath classes yacy -migratewords
  (as it was)

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3044 6c8d7289-2bf4-0310-a012-ef5d649a1542
2006-12-05 02:47:51 +00:00

362 lines
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Java
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//ViewFile.java
//-----------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
//last major change: 12.07.2004
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or
//(at your option) any later version.
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//Using this software in any meaning (reading, learning, copying, compiling,
//running) means that you agree that the Author(s) is (are) not responsible
//for cost, loss of data or any harm that may be caused directly or indirectly
//by usage of this softare or this documentation. The usage of this software
//is on your own risk. The installation and usage (starting/running) of this
//software may allow other people or application to access your computer and
//any attached devices and is highly dependent on the configuration of the
//software which must be done by the user of the software; the author(s) is
//(are) also not responsible for proper configuration and usage of the
//software, even if provoked by documentation provided together with
//the software.
//Any changes to this file according to the GPL as documented in the file
//gpl.txt aside this file in the shipment you received can be done to the
//lines that follows this copyright notice here, but changes must not be
//done inside the copyright notive above. A re-distribution must contain
//the intact and unchanged copyright notice.
//Contributions and changes to the program code must be marked as such.
//you must compile this file with
//javac -classpath .:../Classes Status.java
//if the shell's current path is HTROOT
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Enumeration;
import de.anomic.data.wikiCode;
import de.anomic.http.httpHeader;
import de.anomic.http.httpc;
import de.anomic.index.indexURLEntry;
import de.anomic.net.URL;
import de.anomic.plasma.plasmaCondenser;
import de.anomic.plasma.plasmaHTCache;
import de.anomic.plasma.plasmaParserDocument;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.plasma.cache.IResourceInfo;
import de.anomic.plasma.crawler.plasmaCrawlerException;
import de.anomic.plasma.parser.ParserException;
import de.anomic.server.serverFileUtils;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
public class ViewFile {
public static final int VIEW_MODE_NO_TEXT = 0;
public static final int VIEW_MODE_AS_PLAIN_TEXT = 1;
public static final int VIEW_MODE_AS_PARSED_TEXT = 2;
public static final int VIEW_MODE_AS_PARSED_SENTENCES = 3;
public static final int VIEW_MODE_AS_IFRAME = 4;
public static final String[] highlightingColors = new String[] {
"255,255,100",
"255,155,155",
"0,255,0",
"0,255,255",
"204,153,0",
"204,153,255"
};
public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
serverObjects prop = new serverObjects();
plasmaSwitchboard sb = (plasmaSwitchboard)env;
if (post != null && post.containsKey("words")) try {
prop.put("error_words",URLEncoder.encode((String) post.get("words"), "UTF-8"));
} catch (UnsupportedEncodingException e1) {
// ignore this. this should not occure
}
String viewMode = post.get("viewMode","sentences");
URL url = null;
String descr = "";
int wordCount = 0;
int size = 0;
boolean pre = false;
// getting the url hash from which the content should be loaded
String urlHash = post.get("urlHash","");
if (urlHash.length() > 0) {
// getting the urlEntry that belongs to the url hash
indexURLEntry urlEntry = null;
urlEntry = sb.wordIndex.loadedURL.load(urlHash, null);
if (urlEntry == null) {
prop.put("error",2);
prop.put("viewMode",VIEW_MODE_NO_TEXT);
return prop;
}
// gettin the url that belongs to the entry
indexURLEntry.Components comp = urlEntry.comp();
if ((comp == null) || (comp.url() == null)) {
prop.put("error", 3);
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
url = comp.url();
descr = comp.descr();
urlEntry.wordCount();
size = urlEntry.size();
pre = urlEntry.flags().get(plasmaCondenser.flag_cat_indexof);
}
// alternatively, get the url simply from a url String
// this can be used as a simple tool to test the text parser
String urlString = post.get("url", "");
if (urlString.length() > 0) try {
// this call forces the peer to download web pages
// it is therefore protected by the admin password
if (!sb.verifyAuthentication(header, false)) {
prop.put("AUTHENTICATE", "admin log-in"); // force log-in
return prop;
}
// define an url by post parameter
url = new URL(urlString);
pre = post.get("pre", "false").equals("true");
} catch (MalformedURLException e) {}
if (url == null) {
prop.put("error", 1);
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
// loading the resource content as byte array
InputStream resource = null;
long resourceLength = -1;
IResourceInfo resInfo = null;
String resMime = null;
try {
// trying to load the resource body
resource = sb.cacheManager.getResourceContentStream(url);
resourceLength = sb.cacheManager.getResourceContentLength(url);
// if the resource body was not cached we try to load it from web
if (resource == null) {
plasmaHTCache.Entry entry = null;
try {
entry = sb.snippetCache.loadResourceFromWeb(url, 5000, false);
} catch (plasmaCrawlerException e) {
prop.put("error", 4);
prop.put("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
if (entry != null) {
resInfo = entry.getDocumentInfo();
resource = sb.cacheManager.getResourceContentStream(url);
resourceLength = sb.cacheManager.getResourceContentLength(url);
}
if (resource == null) {
prop.put("error", 4);
prop.put("error_errorText", "No resource available");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
}
// try to load resource metadata
if (resInfo == null) {
// try to load the metadata from cache
try {
resInfo = sb.cacheManager.loadResourceInfo(url);
} catch (Exception e) {
/* ignore this */
}
// if the metadata where not cached try to load it from web
if (resInfo == null) {
String protocol = url.getProtocol();
if (!((protocol.equals("http") || protocol.equals("https")))) {
prop.put("error", 6);
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
httpHeader responseHeader = httpc.whead(url, url.getHost(), 5000, null, null, sb.remoteProxyConfig);
if (responseHeader == null) {
prop.put("error", 4);
prop.put("error_errorText", "Unable to load resource metadata.");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
try {
resInfo = sb.cacheManager.getResourceInfoFactory().buildResourceInfoObj(url, responseHeader);
} catch (Exception e) {
prop.put("error", 4);
prop.put("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
resMime = responseHeader.mime();
}
} else {
resMime = resInfo.getMimeType();
}
} catch (IOException e) {
if (resource != null)
try {
resource.close();
} catch (Exception ex) {
/* ignore this */
}
prop.put("error", 4);
prop.put("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
if (viewMode.equals("plain")) {
// TODO: how to handle very large files here ?
String content;
try {
content = new String(serverFileUtils.read(resource), "UTF-8");
} catch (Exception e) {
prop.put("error", 4);
prop.put("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
} finally {
if (resource != null)
try {
resource.close();
} catch (Exception e) {
/* ignore this */
}
}
content = content.replaceAll("<", "&lt;").replaceAll(">", "&gt;")
.replaceAll("\"", "&quot;").replaceAll("\n", "<br>")
.replaceAll("\t", "&nbsp;&nbsp;&nbsp;&nbsp;");
prop.put("error", 0);
prop.put("viewMode", VIEW_MODE_AS_PLAIN_TEXT);
prop.put("viewMode_plainText", content);
} else if (viewMode.equals("iframe")) {
prop.put("viewMode", VIEW_MODE_AS_IFRAME);
prop.put("viewMode_url", url.toNormalform());
} else if (viewMode.equals("parsed") || viewMode.equals("sentences")) {
// parsing the resource content
plasmaParserDocument document = null;
try {
document = sb.snippetCache.parseDocument(url, resourceLength, resource, resInfo);
if (document == null) {
prop.put("error", 5);
prop.put("error_errorText", "Unknown error");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
} catch (ParserException e) {
prop.put("error", 5);
prop.put("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
} finally {
if (resource != null)
try {
resource.close();
} catch (Exception e) {
/* ignore this */
}
}
resMime = document.getMimeType();
if (viewMode.equals("parsed")) {
String content = new String(document.getTextBytes());
content = wikiCode.replaceHTML(content); // added by Marc Nause
content = content.replaceAll("\n", "<br>").replaceAll("\t", "&nbsp;&nbsp;&nbsp;&nbsp;");
prop.put("viewMode", VIEW_MODE_AS_PARSED_TEXT);
prop.put("viewMode_parsedText", content);
} else {
prop.put("viewMode", VIEW_MODE_AS_PARSED_SENTENCES);
final Enumeration sentences = document.getSentences(pre);
boolean dark = true;
int i = 0;
if (sentences != null)
while (sentences.hasMoreElements()) {
String currentSentence = wikiCode.replaceHTML((String) sentences.nextElement());
// Search word highlighting
String words = post.get("words", null);
if (words != null) {
try {
words = URLDecoder.decode(words, "UTF-8");
} catch (UnsupportedEncodingException e) {
}
String[] wordArray = words.substring(1,
words.length() - 1).split(",");
for (int j = 0; j < wordArray.length; j++) {
String currentWord = wordArray[j].trim();
currentSentence = currentSentence.replaceAll(
currentWord,
"<b style=\"color: black; background-color: rgb("
+ highlightingColors[j % 6]
+ ");\">" + currentWord
+ "</b>");
}
}
prop.put("viewMode_sentences_" + i + "_nr", Integer.toString(i + 1));
prop.put("viewMode_sentences_" + i + "_text", currentSentence);
prop.put("viewMode_sentences_" + i + "_dark", ((dark) ? 1 : 0));
dark = !dark;
i++;
}
prop.put("viewMode_sentences", i);
}
if (document != null) document.close();
}
prop.put("error", 0);
prop.put("error_url", url.toNormalform());
prop.put("error_hash", urlHash);
prop.put("error_wordCount", Integer.toString(wordCount));
prop.put("error_desc", descr);
prop.put("error_size", size);
prop.put("error_mimeType", resMime);
return prop;
}
}
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