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package zutil.net.http;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.net.Socket;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Timer;
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import java.util.TimerTask;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import zutil.log.LogUtil;
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import zutil.net.threaded.ThreadedTCPNetworkServer;
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import zutil.net.threaded.ThreadedTCPNetworkServerThread;
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/**
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* A simple web server that handles both cookies and
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* sessions for all the clients
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*
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* @author Ziver
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*/
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public class HttpServer extends ThreadedTCPNetworkServer{
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public static final Logger logger = LogUtil.getLogger();
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public static final String SERVER_VERSION = "Ziver HttpServer 1.0";
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public static final int COOKIE_TTL = 200;
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public static final int SESSION_TTL = 10*60*1000; // in milliseconds
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public final String server_url;
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public final int server_port;
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private HashMap<String,HttpPage> pages;
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private HttpPage defaultPage;
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private Map<String,Map<String,Object>> sessions;
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private int nextSessionId;
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/**
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* Creates a new instance of the sever
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*
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* @param url The address to the server
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* @param port The port that the server should listen to
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*/
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public HttpServer(String url, int port){
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this(url, port, null, null);
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}
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/**
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* Creates a new instance of the sever
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*
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* @param url The address to the server
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* @param port The port that the server should listen to
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* @param sslCert If this is not null then the server will use SSL connection with this keyStore file path
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* @param sslCert If this is not null then the server will use a SSL connection with the given certificate
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*/
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public HttpServer(String url, int port, File keyStore, String keyStorePass){
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super( port, keyStore, keyStorePass );
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this.server_url = url;
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this.server_port = port;
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pages = new HashMap<String,HttpPage>();
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sessions = Collections.synchronizedMap(new HashMap<String,Map<String,Object>>());
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nextSessionId = 0;
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Timer timer = new Timer();
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timer.schedule(new GarbageCollector(), 0, SESSION_TTL / 2);
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logger.info("HTTP"+(keyStore==null?"":"S")+" Server ready!");
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}
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/**
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* This class acts as an garbage collector that
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* removes old sessions from the session HashMap
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*
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* @author Ziver
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*/
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private class GarbageCollector extends TimerTask {
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public void run(){
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Object[] keys = sessions.keySet().toArray();
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for(Object key : keys){
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Map<String,Object> client_session = sessions.get(key);
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// Check if session is still valid
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if((Long)client_session.get("ttl") < System.currentTimeMillis()){
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sessions.remove(key);
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logger.fine("Removing Session: "+key);
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}
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}
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}
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}
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/**
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* Add a HttpPage to a specific URL
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*
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* @param name The URL or name of the page
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* @param page The page itself
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*/
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public void setPage(String name, HttpPage page){
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pages.put(name, page);
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}
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/**
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* This is a default page that will be shown
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* if there is no other matching page,
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*
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* @param page The HttpPage that will be shown
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*/
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public void setDefaultPage(HttpPage page){
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defaultPage = page;
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}
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protected ThreadedTCPNetworkServerThread getThreadInstance( Socket s ){
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try {
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return new HttpServerThread( s );
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} catch (IOException e) {
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logger.log(Level.SEVERE, "Could not start new Thread", e);
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}
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return null;
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}
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/**
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* Internal class that handles all the requests
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*
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* @author Ziver
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*
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*/
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protected class HttpServerThread implements ThreadedTCPNetworkServerThread{
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private HttpPrintStream out;
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private BufferedReader in;
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private Socket socket;
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public HttpServerThread(Socket socket) throws IOException{
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out = new HttpPrintStream(socket.getOutputStream());
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in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
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this.socket = socket;
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logger.fine("New Connection!!! "+socket.getInetAddress().getHostName());
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}
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public void run(){
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String tmp = null;
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HashMap<String,String> client_info = new HashMap<String,String>();
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HashMap<String,String> cookie = new HashMap<String,String>();
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HashMap<String,String> request = new HashMap<String,String>();
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//**************************** REQUEST *********************************
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try {
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logger.finer("Reciving Http Request!!!");
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HTTPHeaderParser parser = new HTTPHeaderParser(in);
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logger.finest(parser.toString());
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client_info = parser.getHeaders();
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request = parser.getURLAttributes();
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cookie = parser.getCookies();
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//******* Read in the post data if available
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if( parser.getHeader("Content-Length")!=null ){
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// Reads the post data size
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tmp = parser.getHeader("Content-Length");
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int post_data_length = Integer.parseInt( tmp );
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// read the data
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StringBuffer tmpb = new StringBuffer();
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// read the data
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for(int i=0; i<post_data_length ;i++){
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tmpb.append((char)in.read());
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}
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tmp = parser.getHeader("Content-Type");
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if( tmp.contains("application/x-www-form-urlencoded") ){
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// get the variables
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HTTPHeaderParser.parseUrlAttributes( tmpb.toString(), request );
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}
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else if( tmp.contains("application/soap+xml" ) ||
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tmp.contains("text/xml") ||
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tmp.contains("text/plain") ){
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// save the variables
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request.put( "" , tmpb.toString() );
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}
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else if( tmp.contains("multipart/form-data") ){
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// TODO: File upload
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throw new Exception( "\"multipart-form-data\" Not implemented!!!" );
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}
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}
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//**************************** HANDLE REQUEST *********************************
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// Get the client session or create one
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Map<String, Object> client_session;
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long ttl_time = System.currentTimeMillis()+SESSION_TTL;
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if( cookie.containsKey("session_id") && sessions.containsKey(cookie.get("session_id")) ){
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client_session = sessions.get( cookie.get("session_id") );
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// Check if session is still valid
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if( (Long)client_session.get("ttl") < System.currentTimeMillis() ){
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int session_id = (Integer)client_session.get("session_id");
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client_session = Collections.synchronizedMap(new HashMap<String, Object>());
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client_session.put( "session_id", session_id);
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sessions.put( ""+session_id, client_session);
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}
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// renew the session TTL
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client_session.put( "ttl", ttl_time );
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}
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else{
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client_session = Collections.synchronizedMap(new HashMap<String, Object>());
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client_session.put( "session_id", nextSessionId );
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client_session.put( "ttl", ttl_time );
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sessions.put( ""+nextSessionId, client_session );
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nextSessionId++;
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}
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// Debug
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if(logger.isLoggable(Level.FINE)){
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logger.finest( "# page_url: "+parser.getRequestURL() );
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logger.finest( "# cookie: "+cookie );
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logger.finest( "# client_session: "+client_session );
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logger.finest( "# client_info: "+client_info );
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logger.finest( "# request: "+request );
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}
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//**************************** RESPONSE ************************************
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logger.finer("Sending Http Response!!!");
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out.setStatusCode(200);
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out.setHeader( "Server", SERVER_VERSION );
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out.setHeader( "Content-Type", "text/html" );
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out.setCookie( "session_id", ""+client_session.get("session_id") );
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if( !parser.getRequestURL().isEmpty() && pages.containsKey(parser.getRequestURL()) ){
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pages.get(parser.getRequestURL()).respond(out, client_info, client_session, cookie, request);
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}
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else if( defaultPage != null ){
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defaultPage.respond(out, client_info, client_session, cookie, request);
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}
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else{
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out.setStatusCode( 404 );
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out.println( "404 Page Not Found: "+parser.getRequestURL() );
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logger.fine( "404 Page Not Found: "+parser.getRequestURL() );
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}
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//********************************************************************************
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} catch (Exception e) {
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logger.log(Level.WARNING, "500 Internal Server Error", e);
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try {
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out.setStatusCode( 500 );
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} catch (Exception e1) {}
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if(e.getMessage() != null)
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out.println( "500 Internal Server Error: "+e.getMessage() );
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else{
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out.println( "500 Internal Server Error: "+e.getCause().getMessage() );
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}
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}
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try{
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logger.fine("Conection Closed!!!");
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out.close();
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in.close();
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socket.close();
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} catch( Exception e ) {
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logger.log(Level.WARNING, "Could not close connection", e);
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}
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}
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}
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}
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