yacy_search_server/htroot/Network.java
orbiter 99bf0b8e41 refactoring of plasmaWordIndex:
divided that class into three parts:
- the peers object is now hosted by the plasmaSwitchboard
- the crawler elements are now in a new class, crawler.CrawlerSwitchboard
- the index elements are core of the new segment data structure, which is a bundle of different indexes for the full text and (in the future) navigation indexes and the metadata store. The new class is now in kelondro.text.Segment

The refactoring is inspired by the roadmap to create index segments, the option to host different indexes on one peer.

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5990 6c8d7289-2bf4-0310-a012-ef5d649a1542
2009-05-28 14:26:05 +00:00

502 lines
30 KiB
Java

// Network.java
// -----------------------
// part of YaCy
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004, 2005
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// 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 Network.java
// if the shell's current path is HTROOT
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import de.anomic.crawler.HTTPLoader;
import de.anomic.http.httpClient;
import de.anomic.http.httpRequestHeader;
import de.anomic.kelondro.util.DateFormatter;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.plasma.plasmaSwitchboardConstants;
import de.anomic.server.serverCodings;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.yacy.yacyClient;
import de.anomic.yacy.yacyNewsPool;
import de.anomic.yacy.yacyNewsRecord;
import de.anomic.yacy.yacySeed;
import de.anomic.yacy.yacyRelease;
import de.anomic.yacy.yacyVersion;
public class Network {
private static final String STR_TABLE_LIST = "table_list_";
public static serverObjects respond(final httpRequestHeader requestHeader, final serverObjects post, final serverSwitch<?> switchboard) {
final plasmaSwitchboard sb = (plasmaSwitchboard) switchboard;
final long start = System.currentTimeMillis();
// return variable that accumulates replacements
final serverObjects prop = new serverObjects();
prop.setLocalized(!(requestHeader.get("PATH")).endsWith(".xml"));
prop.putHTML("page_networkTitle", sb.getConfig("network.unit.description", "unspecified"));
prop.putHTML("page_networkName", sb.getConfig(plasmaSwitchboardConstants.NETWORK_NAME, "unspecified"));
final boolean overview = (post == null) || (post.get("page", "0").equals("0"));
final String mySeedType = sb.peers.mySeed().get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN);
final boolean iAmActive = (mySeedType.equals(yacySeed.PEERTYPE_SENIOR) || mySeedType.equals(yacySeed.PEERTYPE_PRINCIPAL));
if (overview) {
long accActLinks = sb.peers.countActiveURL();
long accActWords = sb.peers.countActiveRWI();
final long accPassLinks = sb.peers.countPassiveURL();
final long accPassWords = sb.peers.countPassiveRWI();
long accPotLinks = sb.peers.countPotentialURL();
long accPotWords = sb.peers.countPotentialRWI();
int conCount = sb.peers.sizeConnected();
final int disconCount = sb.peers.sizeDisconnected();
int potCount = sb.peers.sizePotential();
// final boolean complete = ((post == null) ? false : post.get("links", "false").equals("true"));
final long otherppm = sb.peers.countActivePPM();
final double otherqpm = sb.peers.countActiveQPM();
long myppm = 0;
double myqph = 0d;
// create own peer info
final yacySeed seed = sb.peers.mySeed();
if (sb.peers.mySeed() != null){ //our Peer
// update seed info
sb.updateMySeed();
long LCount;
long ICount;
long RCount;
try {
LCount = Long.parseLong(seed.get(yacySeed.LCOUNT, "0"));
ICount = Long.parseLong(seed.get(yacySeed.ICOUNT, "0"));
RCount = Long.parseLong(seed.get(yacySeed.RCOUNT, "0"));
} catch (final Exception e) {LCount = 0; ICount = 0; RCount = 0;}
// my-info
prop.putHTML("table_my-name", seed.get(yacySeed.NAME, "-") );
prop.put("table_my-hash", seed.hash );
if (sb.peers.mySeed().isVirgin()) {
prop.put("table_my-info", 0);
} else if(sb.peers.mySeed().isJunior()) {
prop.put("table_my-info", 1);
accPotLinks += LCount;
accPotWords += ICount;
} else if(sb.peers.mySeed().isSenior()) {
prop.put("table_my-info", 2);
accActLinks += LCount;
accActWords += ICount;
} else if(sb.peers.mySeed().isPrincipal()) {
prop.put("table_my-info", 3);
accActLinks += LCount;
accActWords += ICount;
}
prop.put("table_my-acceptcrawl", seed.getFlagAcceptRemoteCrawl() ? 1 : 0);
prop.put("table_my-dhtreceive", seed.getFlagAcceptRemoteIndex() ? 1 : 0);
prop.put("table_my-rankingreceive", seed.getFlagAcceptCitationReference() ? 1 : 0);
myppm = seed.getPPM();
myqph = 60d * seed.getQPM();
prop.put("table_my-version", seed.get(yacySeed.VERSION, "-"));
prop.put("table_my-utc", seed.get(yacySeed.UTC, "-"));
prop.put("table_my-uptime", DateFormatter.formatInterval(60000 * Long.parseLong(seed.get(yacySeed.UPTIME, ""))));
prop.putNum("table_my-LCount", LCount);
prop.putNum("table_my-ICount", ICount);
prop.putNum("table_my-RCount", RCount);
prop.putNum("table_my-sI", Long.parseLong(seed.get(yacySeed.INDEX_OUT, "0")));
prop.putNum("table_my-sU", Long.parseLong(seed.get(yacySeed.URL_OUT, "0")));
prop.putNum("table_my-rI", Long.parseLong(seed.get(yacySeed.INDEX_IN, "0")));
prop.putNum("table_my-rU", Long.parseLong(seed.get(yacySeed.URL_IN, "0")));
prop.putNum("table_my-ppm", myppm);
prop.putNum("table_my-qph", Math.round(100d * myqph) / 100d);
prop.putNum("table_my-totalppm", sb.currentPPM());
prop.putNum("table_my-totalqph", Math.round(6000d * sb.totalQPM) / 100d);
prop.putNum("table_my-seeds", Long.parseLong(seed.get(yacySeed.SCOUNT, "0")));
prop.putNum("table_my-connects", Double.parseDouble(seed.get(yacySeed.CCOUNT, "0")));
prop.put("table_my-url", seed.get(yacySeed.SEEDLIST, ""));
// generating the location string
prop.putHTML("table_my-location", httpClient.generateLocation());
}
// overall results: Network statistics
if (iAmActive) conCount++; else if (mySeedType.equals(yacySeed.PEERTYPE_JUNIOR)) potCount++;
prop.putNum("table_active-count", conCount);
prop.putNum("table_active-links", accActLinks);
prop.putNum("table_active-words", accActWords);
prop.putNum("table_passive-count", disconCount);
prop.putNum("table_passive-links", accPassLinks);
prop.putNum("table_passive-words", accPassWords);
prop.putNum("table_potential-count", potCount);
prop.putNum("table_potential-links", accPotLinks);
prop.putNum("table_potential-words", accPotWords);
prop.putNum("table_all-count", conCount + disconCount + potCount);
prop.putNum("table_all-links", accActLinks + accPassLinks + accPotLinks);
prop.putNum("table_all-words", accActWords + accPassWords + accPotWords);
prop.putNum("table_gppm", otherppm + ((iAmActive) ? myppm : 0));
prop.putNum("table_gqph", Math.round(6000d * otherqpm + 100d * ((iAmActive) ? myqph : 0d)) / 100d);
prop.put("table", 2); // triggers overview
prop.put("page", 0);
} else if (post != null && Integer.parseInt(post.get("page", "1")) == 4) {
prop.put("table", 4); // triggers overview
prop.put("page", 4);
if (post.containsKey("addPeer")) {
// AUTHENTICATE
if (!requestHeader.containsKey(httpRequestHeader.AUTHORIZATION)) {
prop.putHTML("AUTHENTICATE","log-in");
return prop;
}
final HashMap<String, String> map = new HashMap<String, String>();
map.put(yacySeed.IP, post.get("peerIP"));
map.put(yacySeed.PORT, post.get("peerPort"));
yacySeed peer = new yacySeed(post.get("peerHash"),map);
sb.updateMySeed();
final int added = yacyClient.publishMySeed(sb.peers.mySeed(), sb.peers.peerActions, peer.getPublicAddress(), peer.hash);
if (added <= 0) {
prop.put("table_comment",1);
prop.putHTML("table_comment_status","publish: disconnected peer '" + peer.getName() + "/" + post.get("peerHash") + "' from " + peer.getPublicAddress());
} else {
peer = sb.peers.getConnected(peer.hash);
if (peer == null) {
prop.put("table_comment",1);
prop.putHTML("table_comment_status","publish: disconnected peer 'UNKNOWN/" + post.get("peerHash") + "' from UNKNOWN");
} else {
prop.put("table_comment",2);
prop.putHTML("table_comment_status","publish: handshaked " + peer.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_SENIOR) + " peer '" + peer.getName() + "' at " + peer.getPublicAddress());
prop.putHTML("table_comment_details",peer.toString());
}
}
prop.putHTML("table_peerHash",post.get("peerHash"));
prop.putHTML("table_peerIP",post.get("peerIP"));
prop.putHTML("table_peerPort",post.get("peerPort"));
} else {
prop.put("table_peerHash","");
prop.put("table_peerIP","");
prop.put("table_peerPort","");
prop.put("table_comment",0);
}
} else {
// generate table
final int page = (post == null ? 1 : Integer.parseInt(post.get("page", "1")));
final int maxCount = (post == null ? 300 : Integer.parseInt(post.get("maxCount", "300")));
int conCount = 0;
if (sb.peers == null) {
prop.put("table", 0);//no remote senior/principal proxies known"
} else {
int size = 0;
switch (page) {
case 1 : size = sb.peers.sizeConnected(); break;
case 2 : size = sb.peers.sizeDisconnected(); break;
case 3 : size = sb.peers.sizePotential(); break;
default: break;
}
if (size == 0) {
prop.put("table", 0);//no remote senior/principal proxies known"
} else {
// add temporary the own seed to the database
if (iAmActive) {
sb.updateMySeed();
sb.peers.addConnected(sb.peers.mySeed());
}
// find updated Information using YaCyNews
final HashSet<String> updatedProfile = new HashSet<String>();
final HashMap<String, Map<String, String>> updatedWiki = new HashMap<String, Map<String, String>>();
final HashMap<String, Map<String, String>> updatedBlog = new HashMap<String, Map<String, String>>();
final HashMap<String, String> isCrawling = new HashMap<String, String>();
yacyNewsRecord record;
final Iterator<yacyNewsRecord> recordIterator = sb.peers.newsPool.recordIterator(yacyNewsPool.INCOMING_DB, true);
while (recordIterator.hasNext()) {
record = recordIterator.next();
if (record == null) {
continue;
} else if (record.category().equals(yacyNewsPool.CATEGORY_PROFILE_UPDATE)) {
updatedProfile.add(record.originator());
} else if (record.category().equals(yacyNewsPool.CATEGORY_WIKI_UPDATE)) {
updatedWiki.put(record.originator(), record.attributes());
} else if (record.category().equals(yacyNewsPool.CATEGORY_BLOG_ADD)) {
updatedBlog.put(record.originator(), record.attributes());
} else if (record.category().equals(yacyNewsPool.CATEGORY_CRAWL_START)) {
isCrawling.put(record.originator(), record.attributes().get("startURL"));
}
}
boolean dark = true;
yacySeed seed;
final boolean complete = (post != null && post.containsKey("ip"));
Iterator<yacySeed> e = null;
final boolean order = (post != null && post.get("order", "down").equals("up"));
final String sort = (post == null ? null : post.get("sort", null));
switch (page) {
case 1 : e = sb.peers.seedsSortedConnected(order, (sort == null ? yacySeed.LCOUNT : sort)); break;
case 2 : e = sb.peers.seedsSortedDisconnected(order, (sort == null ? yacySeed.LASTSEEN : sort)); break;
case 3 : e = sb.peers.seedsSortedPotential(order, (sort == null ? yacySeed.LASTSEEN : sort)); break;
default: break;
}
String startURL;
Map<String, String> wikiMap;
Map<String, String> blogMap;
String userAgent, location;
int PPM;
double QPM;
Pattern peerSearchPattern = null;
prop.put("regexerror", 0);
prop.put("regexerror_wrongregex", (String)null);
if (post != null && post.containsKey("search")) {
try {
peerSearchPattern = Pattern.compile(post.get("match", ""), Pattern.CASE_INSENSITIVE);
} catch (final PatternSyntaxException pse){
prop.put("regexerror", 1);
prop.putHTML("regexerror_wrongregex", pse.getPattern());
}
}
if(e != null) {
while (e.hasNext() && conCount < maxCount) {
seed = e.next();
if (seed != null) {
if((post != null && post.containsKey("search")) && peerSearchPattern != null /*(wrongregex == null)*/) {
boolean abort = true;
Matcher m = peerSearchPattern.matcher (seed.getName());
if (m.find ()) {
abort = false;
}
m = peerSearchPattern.matcher (seed.hash);
if (m.find ()) {
abort = false;
}
if (abort) continue;
}
prop.put(STR_TABLE_LIST + conCount + "_updatedProfile", 0);
prop.put(STR_TABLE_LIST + conCount + "_updatedWikiPage", 0);
prop.put(STR_TABLE_LIST + conCount + "_updatedBlog", 0);
prop.put(STR_TABLE_LIST + conCount + "_isCrawling", 0);
if (conCount >= maxCount) { break; }
if (sb.peers != null && sb.peers.mySeed() != null && seed.hash != null && seed.hash.equals(sb.peers.mySeed().hash)) {
prop.put(STR_TABLE_LIST + conCount + "_dark", 2);
} else {
prop.put(STR_TABLE_LIST + conCount + "_dark", ((dark) ? 1 : 0) ); dark=!dark;
}
if (updatedProfile.contains(seed.hash)) {
prop.put(STR_TABLE_LIST + conCount + "_updatedProfile", 1);
prop.put(STR_TABLE_LIST + conCount + "_updatedProfile_hash", seed.hash);
}
if ((wikiMap = updatedWiki.get(seed.hash)) == null) {
prop.put(STR_TABLE_LIST + conCount + "_updatedWiki", 0);
} else {
prop.put(STR_TABLE_LIST + conCount + "_updatedWiki", 1);
prop.putHTML(STR_TABLE_LIST + conCount + "_updatedWiki_page", wikiMap.get("page"));
prop.put(STR_TABLE_LIST + conCount + "_updatedWiki_address", seed.getPublicAddress());
}
if ((blogMap = updatedBlog.get(seed.hash)) == null) {
prop.put(STR_TABLE_LIST + conCount + "_updatedBlog", 0);
} else {
prop.put(STR_TABLE_LIST + conCount + "_updatedBlog", 1);
prop.putHTML(STR_TABLE_LIST + conCount + "_updatedBlog_page", blogMap.get("page"));
prop.putHTML(STR_TABLE_LIST + conCount + "_updatedBlog_subject", blogMap.get("subject"));
prop.put(STR_TABLE_LIST + conCount + "_updatedBlog_address", seed.getPublicAddress());
}
PPM = seed.getPPM();
QPM = seed.getQPM();
if (((startURL = isCrawling.get(seed.hash)) != null) && (PPM >= 4)) {
prop.put(STR_TABLE_LIST + conCount + "_isCrawling", 1);
prop.put(STR_TABLE_LIST + conCount + "_isCrawling_page", startURL);
}
prop.put(STR_TABLE_LIST + conCount + "_hash", seed.hash);
String shortname = seed.get(yacySeed.NAME, "deadlink");
if (shortname.length() > 20) {
shortname = shortname.substring(0, 20) + "...";
}
prop.putHTML(STR_TABLE_LIST + conCount + "_shortname", shortname);
prop.putHTML(STR_TABLE_LIST + conCount + "_fullname", seed.get(yacySeed.NAME, "deadlink"));
userAgent = null;
if (seed.hash != null && seed.hash.equals(sb.peers.mySeed().hash)) {
userAgent = HTTPLoader.yacyUserAgent;
location = httpClient.generateLocation();
} else {
userAgent = sb.peers.peerActions.getUserAgent(seed.getIP());
location = parseLocationInUserAgent(userAgent);
}
prop.put(STR_TABLE_LIST + conCount + "_location", location);
if (complete) {
prop.put(STR_TABLE_LIST + conCount + "_complete", 1);
prop.put(STR_TABLE_LIST + conCount + "_complete_ip", seed.getIP() );
prop.put(STR_TABLE_LIST + conCount + "_complete_port", seed.get(yacySeed.PORT, "-") );
prop.put(STR_TABLE_LIST + conCount + "_complete_hash", seed.hash);
prop.put(STR_TABLE_LIST + conCount + "_complete_age", seed.getAge());
prop.putNum(STR_TABLE_LIST + conCount + "_complete_CRWCnt", Long.parseLong(seed.get(yacySeed.CRWCNT, "0")));
prop.putNum(STR_TABLE_LIST + conCount + "_complete_CRTCnt", Long.parseLong(seed.get(yacySeed.CRTCNT, "0")));
prop.putNum(STR_TABLE_LIST + conCount + "_complete_seeds", Long.parseLong(seed.get(yacySeed.SCOUNT, "0")));
prop.putNum(STR_TABLE_LIST + conCount + "_complete_connects", Double.parseDouble(seed.get(yacySeed.CCOUNT, "0")));
prop.putHTML(STR_TABLE_LIST + conCount + "_complete_userAgent", userAgent);
} else {
prop.put(STR_TABLE_LIST + conCount + "_complete", 0);
}
if (seed.isJunior()) {
prop.put(STR_TABLE_LIST + conCount + "_type", 0);
} else if(seed.isSenior()){
prop.put(STR_TABLE_LIST + conCount + "_type", 1);
} else if(seed.isPrincipal()) {
prop.put(STR_TABLE_LIST + conCount + "_type", 2);
}
prop.putHTML(STR_TABLE_LIST + conCount + "_type_url", seed.get(yacySeed.SEEDLIST, "http://nowhere/"));
final long lastseen = Math.abs((System.currentTimeMillis() - seed.getLastSeenUTC()) / 1000 / 60);
if (page == 1 && lastseen > 720) {
continue;
}
if (page == 2 || (page == 1 && lastseen > 360)) { // Passive Peers should be passive, also Peers without contact greater than 6 hours
// principal/senior/junior: red/red=offline
prop.put(STR_TABLE_LIST + conCount + "_type_direct", 2);
} else {
// principal/senior: green/green=direct or yellow/yellow=passive
// junior: red/green=direct or red/yellow=passive
prop.put(STR_TABLE_LIST + conCount + "_type_direct", seed.getFlagDirectConnect() ? 1 : 0);
}
if (page == 1) {
prop.put(STR_TABLE_LIST + conCount + "_acceptcrawl", seed.getFlagAcceptRemoteCrawl() ? 1 : 0); // green=on or red=off
prop.put(STR_TABLE_LIST + conCount + "_dhtreceive", seed.getFlagAcceptRemoteIndex() ? 1 : 0); // green=on or red=off
prop.put(STR_TABLE_LIST + conCount + "_rankingreceive", (seed.getVersion() >= yacyVersion.YACY_ACCEPTS_RANKING_TRANSMISSION) ? 1 : 0);
} else { // Passive, Potential Peers
if (seed.getFlagAcceptRemoteCrawl()) {
prop.put(STR_TABLE_LIST + conCount + "_acceptcrawl", 2); // red/green: offline, was on
} else {
prop.put(STR_TABLE_LIST + conCount + "_acceptcrawl", 0); // red/red; offline was off
}
if (seed.getFlagAcceptRemoteIndex()) {
prop.put(STR_TABLE_LIST + conCount + "_dhtreceive", 2); // red/green: offline, was on
} else {
prop.put(STR_TABLE_LIST + conCount + "_dhtreceive", 0); // red/red; offline was off
}
if (seed.getVersion() >= yacyVersion.YACY_ACCEPTS_RANKING_TRANSMISSION &&
seed.getFlagAcceptCitationReference()) {
prop.put(STR_TABLE_LIST + conCount + "_rankingreceive", 1);
} else {
prop.put(STR_TABLE_LIST + conCount + "_rankingreceive", 0);
}
}
if (seed.getFlagAcceptRemoteIndex()) {
prop.put(STR_TABLE_LIST + conCount + "_dhtreceive_peertags", "");
} else {
final String peertags = serverCodings.set2string(seed.getPeerTags(), ",", false);
prop.putHTML(STR_TABLE_LIST + conCount + "_dhtreceive_peertags", ((peertags == null) || (peertags.length() == 0)) ? "no tags given" : ("tags = " + peertags));
}
prop.putHTML(STR_TABLE_LIST + conCount + "_version", yacyRelease.combined2prettyVersion(seed.get(yacySeed.VERSION, "0.1"), shortname));
prop.putNum(STR_TABLE_LIST + conCount + "_lastSeen", /*seed.getLastSeenString() + " " +*/ lastseen);
prop.put(STR_TABLE_LIST + conCount + "_utc", seed.get(yacySeed.UTC, "-"));
prop.putHTML(STR_TABLE_LIST + conCount + "_uptime", DateFormatter.formatInterval(60000 * Long.parseLong(seed.get(yacySeed.UPTIME, "0"))));
prop.putNum(STR_TABLE_LIST + conCount + "_LCount", seed.getLong(yacySeed.LCOUNT, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_ICount", seed.getLong(yacySeed.ICOUNT, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_RCount", seed.getLong(yacySeed.RCOUNT, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_sI", seed.getLong(yacySeed.INDEX_OUT, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_sU", seed.getLong(yacySeed.URL_OUT, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_rI", seed.getLong(yacySeed.INDEX_IN, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_rU", seed.getLong(yacySeed.URL_IN, 0));
prop.putNum(STR_TABLE_LIST + conCount + "_ppm", PPM);
prop.putNum(STR_TABLE_LIST + conCount + "_qph", Math.round(6000d * QPM) / 100d);
conCount++;
} // seed != null
} // while
}
if (iAmActive) { sb.peers.removeMySeed(); }
prop.putNum("table_list", conCount);
prop.put("table", 1);
prop.putNum("table_num", conCount);
prop.putNum("table_total", ((page == 1) && (iAmActive)) ? (size + 1) : size );
prop.put("table_complete", ((complete)? 1 : 0) );
}
}
prop.put("page", page);
prop.put("table_page", page);
prop.putHTML("table_searchpattern", (post == null ? "" : post.get("match", "")));
switch (page) {
case 1 : prop.putHTML("table_peertype", "senior/principal"); break;
case 2 : prop.putHTML("table_peertype", "senior/principal"); break;
case 3 : prop.putHTML("table_peertype", yacySeed.PEERTYPE_JUNIOR); break;
default: break;
}
}
prop.putNum("table_rt", System.currentTimeMillis() - start);
// return rewrite properties
return prop;
}
/**
* gets the location out of the user agent
*
* location must be after last ; and before first )
*
* @param userAgent in form "useragentinfo (some params; _location_) additional info"
* @return
*/
private static String parseLocationInUserAgent(final String userAgent) {
final String location;
final int firstOpenParenthesis = userAgent.indexOf('(');
final int lastSemicolon = userAgent.lastIndexOf(';');
final int firstClosedParenthesis = userAgent.indexOf(')');
if (lastSemicolon < firstClosedParenthesis) {
// ; Location )
location = (firstClosedParenthesis > 0) ? userAgent.substring(lastSemicolon + 1, firstClosedParenthesis)
.trim() : userAgent.substring(lastSemicolon + 1).trim();
} else {
if (firstOpenParenthesis < userAgent.length()) {
if (firstClosedParenthesis > firstOpenParenthesis) {
// ( Location )
location = userAgent.substring(firstOpenParenthesis + 1, firstClosedParenthesis).trim();
} else {
// ( Location <end>
location = userAgent.substring(firstOpenParenthesis + 1).trim();
}
} else {
location = "";
}
}
return location;
}
}