*) adding servlet that is needed by the yacy screensaver

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1399 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/ScreenSaver.java

@@ -0,0 +1,136 @@
+//autoconfig.pac 
+//-----------------------
+//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.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+
+import de.anomic.http.httpHeader;
+import de.anomic.plasma.plasmaSwitchboard;
+import de.anomic.plasma.plasmaSwitchboardQueue;
+import de.anomic.server.serverObjects;
+import de.anomic.server.serverSwitch;
+import de.anomic.yacy.yacyCore;
+import de.anomic.yacy.yacySeed;
+
+public class ScreenSaver {
+    
+    /**
+     * Generates a proxy-autoconfig-file (application/x-ns-proxy-autoconfig) 
+     * See: <a href="http://wp.netscape.com/eng/mozilla/2.0/relnotes/demo/proxy-live.html">Proxy Auto-Config File Format</a> 
+     * @param header
+     * @param post
+     * @param env
+     * @return
+     * @throws IOException 
+     */
+    public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
+
+        plasmaSwitchboard sb = (plasmaSwitchboard)env;
+        boolean crawlingStarted = false;
+        try {
+            InputStream input = (InputStream) header.get("INPUTSTREAM");
+            OutputStream output = (OutputStream) header.get("OUTPUTSTREAM");
+            
+            String line = null;
+            BufferedReader inputReader = new BufferedReader(new InputStreamReader(input));
+            PrintWriter outputWriter = new PrintWriter(output);
+            while ((line = inputReader.readLine()) != null) {
+                yacyCore.peerActions.updateMySeed();
+                if (line.equals("")) {
+                    continue;
+                } else if (line.startsWith("PPM")) {                    
+                    String currentPPM = yacyCore.seedDB.mySeed.get(yacySeed.ISPEED, "-1");
+                    outputWriter.println(currentPPM);
+                } else if (line.startsWith("LINKS")) {
+                    String currentLinks = yacyCore.seedDB.mySeed.get(yacySeed.LCOUNT, "-1");
+                    outputWriter.println(currentLinks);
+                } else if (line.startsWith("WORDS")) {
+                    String currentWords = yacyCore.seedDB.mySeed.get(yacySeed.ICOUNT, "-1");
+                    outputWriter.println(currentWords);
+                } else if (line.equals("CURRENTURL")) {
+                    String currentURL = "";
+                    ArrayList entryList = new ArrayList();
+                    synchronized (sb.indexingTasksInProcess) {
+                        if (sb.indexingTasksInProcess.size() > 0) {
+                            entryList.addAll(sb.indexingTasksInProcess.values());
+                        }
+                    }
+                    if (entryList.size() > 0) {
+                        plasmaSwitchboardQueue.Entry pcentry = (plasmaSwitchboardQueue.Entry) entryList.get(0);
+                        currentURL = pcentry.url().toString();
+                    }
+                    
+                    outputWriter.println(currentURL);
+                } else if (line.equals("CONTINUECRAWLING")) {
+                    if (sb.crawlingIsPaused()) {
+                        crawlingStarted = true;
+                        sb.continueCrawling();
+                    }
+                } else if (line.equals("EXIT")) {
+                    outputWriter.println("OK");
+                    outputWriter.flush();
+                    return null;
+                } else {
+                    outputWriter.println("Unknown command");
+                }
+                outputWriter.flush();
+            }    
+            
+            return null;
+        } catch (Exception e) {
+            return null;
+        } finally {
+            if (crawlingStarted) {
+                sb.pauseCrawling();
+            }
+        }
+    }
+    
+}