//QuickCrawlLink_p.java
//-----------------------
//part of the AnomicHTTPD caching proxy
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
//
//This file was contributed by Martin Thelian
//$LastChangedDate$ 
//$LastChangedBy$
//$LastChangedRevision$
//
//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 IndexCreate_p.java
//if the shell's current path is HTROOT


import java.net.MalformedURLException;
import java.net.URL;
import java.util.Date;

import de.anomic.htmlFilter.htmlFilterContentScraper;
import de.anomic.http.httpHeader;
import de.anomic.plasma.plasmaCrawlProfile;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.plasma.plasmaURL;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.yacy.yacyCore;

public class QuickCrawlLink_p {
    
    /**
     * Example Javascript to call this servlet:
     * <code>javascript:w = window.open('http://user:pwd@localhost:8080/QuickCrawlLink_p.html?localIndexing=on&crawlingQ=on&xdstopw=on&title=' + escape(document.title) + '&url=' + location.href,'_blank','height=150,width=500,resizable=yes,scrollbar=no,directory=no,menubar=no,location=no'); w.focus();</code>
     * @param header
     * @param post
     * @param env
     * @return
     */
    public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
        
        serverObjects prop = new serverObjects();
        plasmaSwitchboard switchboard = (plasmaSwitchboard)env;
        
        if (post == null) {
            // send back usage example
            prop.put("mode",0);
            
            // getting the http host header
            String hostSocket = (String) header.get(httpHeader.CONNECTION_PROP_HOST);
            
            String host = hostSocket;
            int port = 80, pos = hostSocket.indexOf(":");        
            if (pos != -1) {
                port = Integer.parseInt(hostSocket.substring(pos + 1));
                host = hostSocket.substring(0, pos);
            }    
            
            prop.put("mode_host", "localhost");
            prop.put("mode_port", Integer.toString(port));            
            
            return prop;
        }
        prop.put("mode",1);
        
        // getting the URL
        String crawlingStart = post.get("url",null);
        
        // getting the browser title
        String title = post.get("title",null);
        
        // getting other parameters if set
        String crawlingFilter  = post.get("crawlingFilter", ".*");
        int CrawlingDepth      = Integer.parseInt(post.get("crawlingDepth", "0"));        
        boolean crawlDynamic   = post.get("crawlingQ", "").equals("on");
        boolean storeHTCache   = post.get("storeHTCache", "").equals("on");
        boolean localIndexing  = post.get("localIndexing", "").equals("on");
        boolean remoteIndexing = post.get("crawlOrder", "").equals("on");
        boolean xsstopw        = post.get("xsstopw", "").equals("on");
        boolean xdstopw        = post.get("xdstopw", "").equals("on");
        boolean xpstopw        = post.get("xpstopw", "").equals("on");
        
        prop.put("mode_url",(crawlingStart==null)?"unknown":crawlingStart);
        prop.put("mode_title",(title==null)?"unknown":title);
        
        if (crawlingStart != null) {
            crawlingStart = crawlingStart.trim();
            crawlingStart = htmlFilterContentScraper.urlNormalform(null, crawlingStart);
            
            // check if url is proper
            URL crawlingStartURL = null;
            try {
                crawlingStartURL = new URL(crawlingStart);
            } catch (MalformedURLException e) {
                prop.put("mode_status", 1);
                return prop;
            }
                    
            String urlhash = plasmaURL.urlHash(crawlingStart);
            switchboard.urlPool.loadedURL.remove(urlhash);
            switchboard.urlPool.noticeURL.remove(urlhash);
            switchboard.urlPool.errorURL.remove(urlhash);
            
            // create crawling profile
            plasmaCrawlProfile.entry pe = null;
            try {
                pe = switchboard.profiles.newEntry(
                        crawlingStartURL.getHost(), 
                        crawlingStart, 
                        crawlingFilter, 
                        crawlingFilter, 
                        CrawlingDepth, 
                        CrawlingDepth, 
                        crawlDynamic, 
                        storeHTCache, 
                        true, 
                        localIndexing, 
                        remoteIndexing, 
                        xsstopw, 
                        xdstopw, 
                        xpstopw
                );
            } catch (Exception e) {
                // mist
                prop.put("mode_status", 2);//Error with url
                prop.put("mode_status_error", e.getMessage());
                return prop;
            }
            
            // stack URL
            String reasonString = switchboard.sbStackCrawlThread.stackCrawl(
                    crawlingStart, 
                    null, 
                    yacyCore.seedDB.mySeed.hash, 
                    (title==null)?"CRAWLING-ROOT":title, 
                    new Date(), 
                    0, 
                    pe
            );
            
            // validate rejection reason
            if (reasonString == null) {
                prop.put("mode_status", 0);//start msg
            } else {
                prop.put("mode_status", 3);//start msg
                prop.put("mode_status_error", reasonString);
            }
            
        }
        
        return prop;
    }
    
}