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yacy_search_server
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yacy_search_server/htroot/ViewFile.java

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//ViewFile.java
//-----------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@yacy.net
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//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
//you must compile this file with
//javac -classpath .:../Classes Status.java
//if the shell's current path is HTROOT
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import net.yacy.cora.document.ASCII;
import net.yacy.cora.document.MultiProtocolURI;
import net.yacy.cora.document.UTF8;
import net.yacy.cora.lod.JenaTripleStore;
import net.yacy.cora.lod.vocabulary.YaCyMetadata;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.services.federated.yacy.CacheStrategy;
import net.yacy.document.Condenser;
import net.yacy.document.Document;
import net.yacy.document.LibraryProvider;
import net.yacy.document.Parser;
import net.yacy.document.WordTokenizer;
import net.yacy.document.parser.html.CharacterCoding;
import net.yacy.document.parser.html.ImageEntry;
import net.yacy.kelondro.data.meta.DigestURI;
import net.yacy.kelondro.data.meta.URIMetadataRow;
import net.yacy.search.Switchboard;
import net.yacy.search.index.Segment;
import net.yacy.search.index.Segments;
import com.hp.hpl.jena.rdf.model.Model;
import de.anomic.crawler.Cache;
import de.anomic.crawler.retrieval.Response;
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_FROM_WEB = 4;
public static final int VIEW_MODE_AS_IFRAME_FROM_CACHE = 5;
public static final int VIEW_MODE_AS_LINKLIST = 6;
public static final int VIEW_MODE_AS_PARSED_WORDS = 7;
private static final String HIGHLIGHT_CSS = "searchHighlight";
private static final int MAX_HIGHLIGHTS = 6;
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final serverObjects prop = new serverObjects();
final Switchboard sb = (Switchboard)env;
prop.put("topmenu", sb.getConfigBool("publicTopmenu", true) ? 1 : 0);
if (post == null) {
prop.putHTML("error_words", "");
prop.put("error_vMode-sentences", "1");
prop.put("error", "1");
prop.put("url", "");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
// get segment
Segment indexSegment = null;
final boolean authorized = sb.verifyAuthentication(header);
if (post != null && post.containsKey("segment") && authorized) {
indexSegment = sb.indexSegments.segment(post.get("segment"));
} else {
indexSegment = sb.indexSegments.segment(Segments.Process.PUBLIC);
}
if (post.containsKey("words"))
prop.putHTML("error_words", post.get("words"));
else {
prop.putHTML("error_words", "");
}
final String viewMode = post.get("viewMode","parsed");
prop.put("error_vMode-" + viewMode, "1");
DigestURI url = null;
String descr = "";
final int wordCount = 0;
int size = 0;
boolean pre = false;
// get the url hash from which the content should be loaded
String urlHash = post.get("urlHash", "");
URIMetadataRow urlEntry = null;
// get the urlEntry that belongs to the url hash
if (urlHash.length() > 0 && (urlEntry = indexSegment.urlMetadata().load(ASCII.getBytes(urlHash))) != null) {
// get the url that belongs to the entry
if (urlEntry == null || urlEntry.url() == null) {
prop.put("error", "3");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
url = urlEntry.url();
descr = urlEntry.dc_title();
//urlEntry.wordCount();
size = urlEntry.size();
pre = urlEntry.flags().get(Condenser.flag_cat_indexof);
}
prop.put("error_inurldb", urlEntry == null ? 0 : 1);
// alternatively, get the url simply from a url String
// this can be used as a simple tool to test the text parser
final 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)) {
prop.authenticationRequired();
return prop;
}
// define an url by post parameter
url = new DigestURI(MultiProtocolURI.unescape(urlString));
urlHash = ASCII.String(url.hash());
pre = post.getBoolean("pre", false);
} catch (final MalformedURLException e) {}
if (url == null) {
prop.put("error", "1");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
prop.put("url", "");
return prop;
} else {
prop.put("url", url.toNormalform(false, true));
}
// loading the resource content as byte array
prop.put("error_incache", Cache.has(url.hash()) ? 1 : 0);
Response response = null;
try {
response = sb.loader.load(sb.loader.request(url, true, false), authorized ? CacheStrategy.IFEXIST : CacheStrategy.CACHEONLY, Integer.MAX_VALUE, true);
} catch (final IOException e) {
prop.put("error", "4");
prop.put("error_errorText", "error loading resource: " + e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
if (response == null) {
prop.put("error", "4");
prop.put("error_errorText", "No resource available");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
final String[] wordArray = wordArray(post.get("words", null));
if (viewMode.equals("plain")) {
// TODO: how to handle very large files here ?
String content;
try {
content = UTF8.String(response.getContent());
} catch (final Exception e) {
prop.put("error", "4");
prop.putHTML("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
prop.put("error", "0");
prop.put("viewMode", VIEW_MODE_AS_PLAIN_TEXT);
prop.put("viewMode_plainText", markup(wordArray, content).replaceAll("\n", "<br />").replaceAll("\t", "&nbsp;&nbsp;&nbsp;&nbsp;"));
} else if (viewMode.equals("iframeWeb")) {
prop.put("viewMode", VIEW_MODE_AS_IFRAME_FROM_WEB);
prop.put("viewMode_url", url.toNormalform(false, true));
} else if (viewMode.equals("iframeCache")) {
prop.put("viewMode", VIEW_MODE_AS_IFRAME_FROM_CACHE);
final String ext = url.getFileExtension();
prop.put("viewMode_png", 0);
prop.put("viewMode_html", 0);
if (ext.length() > 0 && "jpg.jpeg.png.gif".indexOf(ext) >= 0) {
prop.put("viewMode_png", 1);
prop.put("viewMode_png_url", url.toNormalform(false, true));
} else {
prop.put("viewMode_html", 1);
prop.put("viewMode_html_url", url.toNormalform(false, true));
}
} else if (viewMode.equals("parsed") || viewMode.equals("sentences") || viewMode.equals("words") || viewMode.equals("links")) {
// parsing the resource content
Document document = null;
try {
document = Document.mergeDocuments(response.url(), response.getMimeType(), response.parse());
if (document == null) {
prop.put("error", "5");
prop.put("error_errorText", "Unknown error");
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
} catch (final Parser.Failure e) {
prop.put("error", "5");
prop.putHTML("error_errorText", e.getMessage());
prop.put("viewMode", VIEW_MODE_NO_TEXT);
return prop;
}
if (viewMode.equals("parsed")) {
final String content = UTF8.String(document.getTextBytes());
// content = wikiCode.replaceHTML(content); // added by Marc Nause
prop.put("viewMode", VIEW_MODE_AS_PARSED_TEXT);
prop.put("viewMode_title", document.dc_title());
prop.put("viewMode_creator", document.dc_creator());
prop.put("viewMode_subject", document.dc_subject(','));
prop.put("viewMode_description", document.dc_description());
prop.put("viewMode_publisher", document.dc_publisher());
prop.put("viewMode_format", document.dc_format());
prop.put("viewMode_identifier", document.dc_identifier());
prop.put("viewMode_source", url.toString());
prop.put("viewMode_lat", document.lat());
prop.put("viewMode_lon", document.lon());
prop.put("viewMode_parsedText", markup(wordArray, content).replaceAll("\n", "<br />").replaceAll("\t", "&nbsp;&nbsp;&nbsp;&nbsp;"));
} else if (viewMode.equals("sentences")) {
prop.put("viewMode", VIEW_MODE_AS_PARSED_SENTENCES);
final Collection<StringBuilder> sentences = document.getSentences(pre);
boolean dark = true;
int i = 0;
String sentence;
if (sentences != null) {
// Search word highlighting
for (final StringBuilder s: sentences) {
sentence = s.toString();
if (sentence.trim().length() > 0) {
prop.put("viewMode_sentences_" + i + "_nr", i + 1);
prop.put("viewMode_sentences_" + i + "_text", markup(wordArray, sentence));
prop.put("viewMode_sentences_" + i + "_dark", dark ? "1" : "0");
dark = !dark;
i++;
}
}
}
prop.put("viewMode_sentences", i);
} else if (viewMode.equals("words")) {
prop.put("viewMode", VIEW_MODE_AS_PARSED_WORDS);
final Collection<StringBuilder> sentences = document.getSentences(pre);
boolean dark = true;
int i = 0;
String sentence;
StringBuilder token;
if (sentences != null) {
// Search word highlighting
for (final StringBuilder s: sentences) {
sentence = s.toString();
Enumeration<StringBuilder> tokens = null;
tokens = new WordTokenizer(new ByteArrayInputStream(UTF8.getBytes(sentence)), LibraryProvider.dymLib);
while (tokens.hasMoreElements()) {
token = tokens.nextElement();
if (token.length() > 0) {
prop.put("viewMode_words_" + i + "_nr", i + 1);
prop.put("viewMode_words_" + i + "_word", token);
prop.put("viewMode_words_" + i + "_dark", dark ? "1" : "0");
dark = !dark;
i++;
}
}
}
}
prop.put("viewMode_words", i);
} else if (viewMode.equals("links")) {
prop.put("viewMode", VIEW_MODE_AS_LINKLIST);
boolean dark = true;
int i = 0;
i += putMediaInfo(prop, wordArray, i, document.getVideolinks(), "video", (i % 2 == 0), document.getAnchors());
i += putMediaInfo(prop, wordArray, i, document.getAudiolinks(), "audio", (i % 2 == 0), document.getAnchors());
dark = (i % 2 == 0);
final Map<MultiProtocolURI, ImageEntry> ts = document.getImages();
final Iterator<ImageEntry> tsi = ts.values().iterator();
ImageEntry entry;
while (tsi.hasNext()) {
entry = tsi.next();
prop.put("viewMode_links_" + i + "_nr", i);
prop.put("viewMode_links_" + i + "_dark", dark ? "1" : "0");
prop.put("viewMode_links_" + i + "_type", "image");
prop.put("viewMode_links_" + i + "_text", (entry.alt().isEmpty()) ? "&nbsp;" : markup(wordArray, entry.alt()));
prop.put("viewMode_links_" + i + "_url", entry.url().toNormalform(false, true));
prop.put("viewMode_links_" + i + "_link", markup(wordArray, entry.url().toNormalform(false, true)));
if (entry.width() > 0 && entry.height() > 0) {
prop.put("viewMode_links_" + i + "_rel", entry.width() + "x" + entry.height() + " Pixel");
} else {
prop.put("viewMode_links_" + i + "_rel", "");
}
prop.put("viewMode_links_" + i + "_name", "");
dark = !dark;
i++;
}
i += putMediaInfo(prop, wordArray, i, document.getApplinks(), "app", (i % 2 == 0), document.getAnchors());
i += putMediaInfo(prop, wordArray, i, document.getHyperlinks(), "link", (i % 2 == 0), document.getAnchors());
prop.put("viewMode_links", i);
}
if (document != null) document.close();
}
prop.put("error", "0");
prop.put("error_url", url.toNormalform(false, true));
prop.put("error_hash", urlHash);
prop.put("error_wordCount", wordCount);
prop.putHTML("error_desc", (descr.isEmpty()) ? "&nbsp;" : descr);
prop.putNum("error_size", size);
prop.put("error_mimeTypeAvailable", (response.getMimeType() == null) ? "0" : "1");
prop.put("error_mimeTypeAvailable_mimeType", response.getMimeType());
Model model = JenaTripleStore.getSubmodelBySubject(YaCyMetadata.hashURI(url.hash()));
prop.putXML("error_triples", JenaTripleStore.getRDFByModel(model));
return prop;
}
private static final String[] wordArray(String words) {
String[] w = new String[0];
if (words == null || words.length() == 0) return w;
if (words.length() > 1 && words.charAt(0) == '[' && words.charAt(words.length() - 1) == ']') {
words = words.substring(1, words.length() - 1);
}
words = UTF8.decodeURL(words);
if (words.indexOf(' ',0) >= 0) return words.split(" ");
if (words.indexOf(',',0) >= 0) return words.split(",");
if (words.indexOf('+',0) >= 0) return words.split("\\+");
w = new String[1];
w[0] = words;
return w;
}
private static final String markup(final String[] wordArray, String message) {
message = CharacterCoding.unicode2html(message, true);
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;
}
private static int putMediaInfo(
final serverObjects prop,
final String[] wordArray,
int c,
final Map<MultiProtocolURI, String> media,
final String type,
boolean dark,
final Map<MultiProtocolURI, Properties> alllinks) {
int i = 0;
for (final Map.Entry<MultiProtocolURI, String> entry : media.entrySet()) {
final Properties p = alllinks.get(entry.getKey());
final String name = p.getProperty("name", ""); // the name attribute
final String rel = p.getProperty("rel", ""); // the rel-attribute
final String text = p.getProperty("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", type);
prop.put("viewMode_links_" + c + "_text", text);
prop.put("viewMode_links_" + c + "_link", markup(wordArray, entry.getKey().toNormalform(true, false)));
prop.put("viewMode_links_" + c + "_url", entry.getKey().toNormalform(true, false));
prop.put("viewMode_links_" + c + "_rel", rel);
prop.put("viewMode_links_" + c + "_name", name);
dark = !dark;
c++;
i++;
}
return i;
}
}
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