Package freenet.node

Source Code of freenet.node.TextModeClientInterface

package freenet.node;

import static java.util.concurrent.TimeUnit.MINUTES;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.net.MalformedURLException;
import java.net.SocketException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.text.NumberFormat;
import java.util.HashMap;

import freenet.client.ClientMetadata;
import freenet.client.DefaultMIMETypes;
import freenet.client.FetchContext;
import freenet.client.FetchException;
import freenet.client.FetchException.FetchExceptionMode;
import freenet.client.FetchResult;
import freenet.client.FetchWaiter;
import freenet.client.HighLevelSimpleClient;
import freenet.client.InsertBlock;
import freenet.client.InsertException;
import freenet.client.InsertException.InsertExceptionMode;
import freenet.client.async.ClientGetter;
import freenet.client.async.DumperSnoopMetadata;
import freenet.client.events.EventDumper;
import freenet.client.filter.ContentFilter;
import freenet.clients.fcp.AddPeer;
import freenet.crypt.RandomSource;
import freenet.io.comm.Peer;
import freenet.io.comm.PeerParseException;
import freenet.io.comm.ReferenceSignatureVerificationException;
import freenet.keys.FreenetURI;
import freenet.keys.InsertableClientSSK;
import freenet.node.DarknetPeerNode.FRIEND_TRUST;
import freenet.node.DarknetPeerNode.FRIEND_VISIBILITY;
import freenet.support.HexUtil;
import freenet.support.LogThresholdCallback;
import freenet.support.Logger;
import freenet.support.Logger.LogLevel;
import freenet.support.SimpleFieldSet;
import freenet.support.SizeUtil;
import freenet.support.api.Bucket;
import freenet.support.io.ArrayBucket;
import freenet.support.io.BucketTools;
import freenet.support.io.Closer;
import freenet.support.io.FileBucket;

/**
* @author amphibian
*
* Read commands to fetch or put from stdin.
*
* Execute them.
*/
public class TextModeClientInterface implements Runnable {

    final RandomSource r;
    final Node n;
    final NodeClientCore core;
    final HighLevelSimpleClient client;
    final File downloadsDir;
    final InputStream in;
    final Writer w;
    private static final String ENCODING = "UTF-8";

    private static volatile boolean logMINOR;
    static {
        Logger.registerLogThresholdCallback(new LogThresholdCallback() {

            @Override
            public void shouldUpdate() {
                logMINOR = Logger.shouldLog(LogLevel.MINOR, this);
            }
        });
    }
   
    public TextModeClientInterface(TextModeClientInterfaceServer server, InputStream in, OutputStream out) {
      this.n = server.n;
      this.core = server.n.clientCore;
      this.r = server.r;
        client = core.makeClient(RequestStarter.INTERACTIVE_PRIORITY_CLASS, true, false);
      this.downloadsDir = server.downloadsDir;
      this.in = in;
        try {
          w = new OutputStreamWriter(out, ENCODING);
      client.addEventHook(new EventDumper(new BufferedWriter(new OutputStreamWriter(out, ENCODING)), false));
    } catch (UnsupportedEncodingException e) {
      throw new Error(e);
    }
  }

    public TextModeClientInterface(Node n, NodeClientCore core, HighLevelSimpleClient c, File downloadDir, InputStream in, OutputStream out) {
      this.n = n;
      this.r = n.random;
      this.core = core;
      this.client = c;
      this.downloadsDir = downloadDir;
      this.in = in;
        try {
          w = new OutputStreamWriter(out, ENCODING);
      client.addEventHook(new EventDumper(new BufferedWriter(new OutputStreamWriter(out, ENCODING)), false));
    } catch (UnsupportedEncodingException e) {
      throw new Error(e);
    }
    }
   
    @Override
    public void run() {
      freenet.support.Logger.OSThread.logPID(this);
      try {
        realRun();
      } catch (IOException e) {
            if(logMINOR) Logger.minor(this, "Caught "+e, e);
        } catch (Throwable t) {
        Logger.error(this, "Caught "+t, t);
      }
    }
 
  public void realRun() throws IOException {
    printHeader(w);

    BufferedReader reader = new BufferedReader(new InputStreamReader(in, ENCODING));
    while(true) {
      try {
        w.write("TMCI> ");
        w.flush();
        if(processLine(reader)) {
          reader.close();
          return;
        }
      } catch (SocketException e) {
        Logger.error(this, "Socket error: "+e, e);
        return;
      } catch (Throwable t) {
        Logger.error(this, "Caught "+t, t);
        System.out.println("Caught: "+t);
        StringWriter sw = new StringWriter();
        t.printStackTrace(new PrintWriter(sw));
        try {
          w.write(sw.toString());
        } catch (IOException e) {
          Logger.error(this, "Socket error: "+e, e);
          return;
        }
      }
    }
  }
   
  private void printHeader(Writer sw) throws IOException {
      StringBuilder sb = new StringBuilder();
     
        sb.append("Trivial Text Mode Client Interface\r\n");
        sb.append("---------------------------------------\r\n");
        sb.append("Freenet 0.7.5 Build #").append(Version.buildNumber()).append(" r" + Version.cvsRevision() + "\r\n");
        sb.append("Enter one of the following commands:\r\n");
        sb.append("GET:<Freenet key> - Fetch a key\r\n");
        sb.append("DUMP:<Freenet key> - Dump metadata for a key\r\n");
        sb.append("PUT:\\r\\n<text, until a . on a line by itself> - Insert the document and return the key.\r\n");
        sb.append("PUT:<text> - Put a single line of text to a CHK and return the key.\r\n");
        sb.append("GETCHK:\\r\\n<text, until a . on a line by itself> - Get the key that would be returned if the document was inserted.\r\n");
        sb.append("GETCHK:<text> - Get the key that would be returned if the line was inserted.\r\n");
        sb.append("PUTFILE:<filename>[#<mimetype>] - Put a file from disk.\r\n");
        sb.append("GETFILE:<filename> - Fetch a key and put it in a file. If the key includes a filename we will use it but we will not overwrite local files.\r\n");
        sb.append("GETCHKFILE:<filename> - Get the key that would be returned if we inserted the file.\r\n");
        sb.append("PUTDIR:<path>[#<defaultfile>] - Put the entire directory from disk.\r\n");
        sb.append("GETCHKDIR:<path>[#<defaultfile>] - Get the key that would be returned if we'd put the entire directory from disk.\r\n");
        sb.append("MAKESSK - Create an SSK keypair.\r\n");
        sb.append("PUTSSK:<insert uri>;<url to redirect to> - Insert an SSK redirect to a file already inserted.\r\n");
        sb.append("PUTSSKDIR:<insert uri>#<path>[#<defaultfile>] - Insert an entire directory to an SSK.\r\n");
        sb.append("PLUGLOAD: - Load plugin. (use \"PLUGLOAD:?\" for more info)\r\n");
        //sb.append("PLUGLOAD: <pkg.classname>[(@<URI to jarfile.jar>|<<URI to file containing real URI>|* (will load from freenets pluginpool))] - Load plugin.\r\n");
        sb.append("PLUGLIST - List all loaded plugins.\r\n");
        sb.append("PLUGKILL:<pluginID> - Unload the plugin with the given ID (see PLUGLIST).\r\n");
//        sb.append("PUBLISH:<name> - create a publish/subscribe stream called <name>\r\n");
//        sb.append("PUSH:<name>:<text> - publish a single line of text to the stream named\r\n");
//        sb.append("SUBSCRIBE:<key> - subscribe to a publish/subscribe stream by key\r\n");
        sb.append("CONNECT:<filename|URL> - see ADDPEER:<filename|URL> below\r\n");
        sb.append("CONNECT:\\r\\n<noderef> - see ADDPEER:\\r\\n<noderef> below\r\n");
        sb.append("DISCONNECT:<ip:port|name> - see REMOVEPEER:<ip:port|name|identity> below\r\n");
        sb.append("ADDPEER:<filename|URL> - add a peer from its ref in a file/url.\r\n");
        sb.append("ADDPEER:\\r\\n<noderef including an End on a line by itself> - add a peer by entering a noderef directly.\r\n");
        sb.append("DISABLEPEER:<ip:port|name|identity> - disable a peer by providing its ip+port, name, or identity\r\n");
        sb.append("ENABLEPEER:<ip:port|name|identity> - enable a peer by providing its ip+port, name, or identity\r\n");
        sb.append("SETPEERLISTENONLY:<ip:port|name|identity> - set ListenOnly on a peer by providing its ip+port, name, or identity\r\n");
        sb.append("UNSETPEERLISTENONLY:<ip:port|name|identity> - unset ListenOnly on a peer by providing its ip+port, name, or identity\r\n");
        sb.append("HAVEPEER:<ip:port|name|identity> - report true/false on having a peer by providing its ip+port, name, or identity\r\n");
        sb.append("REMOVEPEER:<ip:port|name|identity> - remove a peer by providing its ip+port, name, or identity\r\n");
        sb.append("PEER:<ip:port|name|identity> - report the noderef of a peer (without metadata) by providing its ip+port, name, or identity\r\n");
        sb.append("PEERWMD:<ip:port|name|identity> - report the noderef of a peer (with metadata) by providing its ip+port, name, or identity\r\n");
        sb.append("PEERS - report tab delimited list of peers with name, ip+port, identity, location, status and idle time in seconds\r\n");
        sb.append("NAME:<new node name> - change the node's name.\r\n");
        sb.append("UPDATE ask the node to self-update if possible. \r\n");
        sb.append("FILTER: \\r\\n<text, until a . on a line by itself> - output the content as it returns from the content filter\r\n");
//        sb.append("SUBFILE:<filename> - append all data received from subscriptions to a file, rather than sending it to stdout.\r\n");
//        sb.append("SAY:<text> - send text to the last created/pushed stream\r\n");
        sb.append("STATUS - display some status information on the node including its reference and connections.\r\n");
        sb.append("MEMSTAT - display some memory usage related informations.\r\n");
        sb.append("SHUTDOWN - exit the program\r\n");
        sb.append("ANNOUNCE[:<location>] - announce to the specified location\r\n");
        if(n.isUsingWrapper())
          sb.append("RESTART - restart the program\r\n");
        if(core != null && core.directTMCI != this) {
          sb.append("QUIT - close the socket\r\n");
        }
        if(Node.isTestnetEnabled()) {
          sb.append("WARNING: TESTNET MODE ENABLED. YOU HAVE NO ANONYMITY.\r\n");
        }
        sw.write(sb.toString());
    }

  /**
     * Process a single command.
     * @throws IOException If we could not write the data to stdout.
     */
    private boolean processLine(BufferedReader reader) throws IOException {
        String line;
        StringBuilder outsb = new StringBuilder();
        try {
            line = reader.readLine();
        } catch (IOException e) {
            outsb.append("Bye... (").append(e).append(')');
            System.err.println("Bye... ("+e+ ')');
            return true;
        }
        boolean getCHKOnly = false;
        if(line == null) return true;
        String uline = line.toUpperCase();
        if(logMINOR)
          Logger.minor(this, "Command: "+line);
        if(uline.startsWith("GET:")) {
            // Should have a key next
            String key = line.substring("GET:".length()).trim();
            Logger.normal(this, "Key: "+key);
            FreenetURI uri;
            try {
                uri = new FreenetURI(key);
                Logger.normal(this, "Key: "+uri);
            } catch (MalformedURLException e2) {
                outsb.append("Malformed URI: ").append(key).append(" : ").append(e2);
    outsb.append("\r\n");
    w.write(outsb.toString());
    w.flush();
                return false;
            }
            try {
        FetchResult result = client.fetch(uri);
        ClientMetadata cm = result.getMetadata();
                outsb.append("Content MIME type: ").append(cm.getMIMEType());
        Bucket data = result.asBucket();
        // FIXME limit it above
        if(data.size() > 32*1024) {
          System.err.println("Data is more than 32K: "+data.size());
          outsb.append("Data is more than 32K: ").append(data.size());
          outsb.append("\r\n");
          w.write(outsb.toString());
          w.flush();
          return false;
        }
        byte[] dataBytes = BucketTools.toByteArray(data);
        boolean evil = false;
        for(byte b: dataBytes) {
          // Look for escape codes
          if(b == '\n') continue;
          if(b == '\r') continue;
          if(b < 32) evil = true;
        }
        if(evil) {
          System.err.println("Data may contain escape codes which could cause the terminal to run arbitrary commands! Save it to a file if you must with GETFILE:");
          outsb.append("Data may contain escape codes which could cause the terminal to run arbitrary commands! Save it to a file if you must with GETFILE:");
          outsb.append("\r\n");
          w.write(outsb.toString());
          w.flush();
          return false;
        }
        outsb.append("Data:\r\n");
        outsb.append(new String(dataBytes, ENCODING));
      } catch (FetchException e) {
                outsb.append("Error: ").append(e.getMessage()).append("\r\n");
              if((e.getMode() == FetchExceptionMode.SPLITFILE_ERROR) && (e.errorCodes != null)) {
                outsb.append(e.errorCodes.toVerboseString());
              }
              if(e.newURI != null)
                    outsb.append("Permanent redirect: ").append(e.newURI).append("\r\n");
      }
        } else if(uline.startsWith("DUMP:")) {
              // Should have a key next
              String key = line.substring("DUMP:".length()).trim();
              Logger.normal(this, "Key: "+key);
              FreenetURI uri;
              try {
                  uri = new FreenetURI(key);
                  Logger.normal(this, "Key: "+uri);
              } catch (MalformedURLException e2) {
                  outsb.append("Malformed URI: ").append(key).append(" : ").append(e2);
      outsb.append("\r\n");
      w.write(outsb.toString());
      w.flush();
                  return false;
              }
              try {
                FetchContext context = client.getFetchContext();
              FetchWaiter fw = new FetchWaiter((RequestClient)client);
              ClientGetter get = new ClientGetter(fw, uri, context, RequestStarter.INTERACTIVE_PRIORITY_CLASS, null, null, null);
              get.setMetaSnoop(new DumperSnoopMetadata());
                get.start(n.clientCore.clientContext);
          FetchResult result = fw.waitForCompletion();
          ClientMetadata cm = result.getMetadata();
                  outsb.append("Content MIME type: ").append(cm.getMIMEType());
          Bucket data = result.asBucket();
          // FIXME limit it above
          if(data.size() > 32*1024) {
            System.err.println("Data is more than 32K: "+data.size());
            outsb.append("Data is more than 32K: ").append(data.size());
            outsb.append("\r\n");
            w.write(outsb.toString());
            w.flush();
            return false;
          }
          byte[] dataBytes = BucketTools.toByteArray(data);
          boolean evil = false;
          for(byte b: dataBytes) {
            // Look for escape codes
            if(b == '\n') continue;
            if(b == '\r') continue;
            if(b < 32) evil = true;
          }
          if(evil) {
            System.err.println("Data may contain escape codes which could cause the terminal to run arbitrary commands! Save it to a file if you must with GETFILE:");
            outsb.append("Data may contain escape codes which could cause the terminal to run arbitrary commands! Save it to a file if you must with GETFILE:");
            outsb.append("\r\n");
            w.write(outsb.toString());
            w.flush();
            return false;
          }
          outsb.append("Data:\r\n");
          outsb.append(new String(dataBytes, ENCODING));
        } catch (FetchException e) {
                  outsb.append("Error: ").append(e.getMessage()).append("\r\n");
                if((e.getMode() == FetchExceptionMode.SPLITFILE_ERROR) && (e.errorCodes != null)) {
                  outsb.append(e.errorCodes.toVerboseString());
                }
                if(e.newURI != null)
                      outsb.append("Permanent redirect: ").append(e.newURI).append("\r\n");
        }
        } else if(uline.startsWith("GETFILE:")) {
            // Should have a key next
            String key = line.substring("GETFILE:".length()).trim();
            Logger.normal(this, "Key: "+key);
            FreenetURI uri;
            try {
                uri = new FreenetURI(key);
            } catch (MalformedURLException e2) {
                outsb.append("Malformed URI: ").append(key).append(" : ").append(e2);
    outsb.append("\r\n");
    w.write(outsb.toString());
    w.flush();
                return false;
            }
            try {
              long startTime = System.currentTimeMillis();
        FetchResult result = client.fetch(uri);
        ClientMetadata cm = result.getMetadata();
                outsb.append("Content MIME type: ").append(cm.getMIMEType());
        Bucket data = result.asBucket();
                // Now calculate filename
                String fnam = uri.getDocName();
                fnam = sanitize(fnam);
                if(fnam.length() == 0) {
                    fnam = "freenet-download-"+HexUtil.bytesToHex(BucketTools.hash(data), 0, 10);
                    String ext = DefaultMIMETypes.getExtension(cm.getMIMEType());
                    if((ext != null) && !ext.equals(""))
                      fnam += '.' + ext;
                }
                File f = new File(downloadsDir, fnam);
                if(f.exists()) {
                    outsb.append("File exists already: ").append(fnam);
                    fnam = "freenet-"+System.currentTimeMillis()+ '-' +fnam;
                }
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(f);
                    BucketTools.copyTo(data, fos, Long.MAX_VALUE);
                    fos.close();
                    outsb.append("Written to ").append(fnam);
                } catch (IOException e) {
                    outsb.append("Could not write file: caught ").append(e);
                    e.printStackTrace();
                } finally {
                    if(fos != null) try {
                        fos.close();
                    } catch (IOException e1) {
                        // Ignore
                    }
                }
                long endTime = System.currentTimeMillis();
                long sz = data.size();
                double rate = 1000.0 * sz / (endTime-startTime);
                outsb.append("Download rate: ").append(rate).append(" bytes / second");
      } catch (FetchException e) {
                outsb.append("Error: ").append(e.getMessage());
              if((e.getMode() == FetchExceptionMode.SPLITFILE_ERROR) && (e.errorCodes != null)) {
                outsb.append(e.errorCodes.toVerboseString());
              }
              if(e.newURI != null)
                    outsb.append("Permanent redirect: ").append(e.newURI).append("\r\n");
      }
    } else if(uline.startsWith("UPDATE")) {
      outsb.append("starting the update process");
      // FIXME run on separate thread
      n.ticker.queueTimedJob(new Runnable() {
        @Override
        public void run() {
            freenet.support.Logger.OSThread.logPID(this);
          n.getNodeUpdater().arm();
        }
      }, 0);
      outsb.append("\r\n");
      w.write(outsb.toString());
      w.flush();
      return false;
    }else if(uline.startsWith("FILTER:")) {
      line = line.substring("FILTER:".length()).trim();
      outsb.append("Here is the result:\r\n");
     
      final String content = readLines(reader, false);
      final Bucket input = new ArrayBucket(content.getBytes("UTF-8"));
      final Bucket output = new ArrayBucket();
      InputStream inputStream = null;
      OutputStream outputStream = null;
      InputStream bis = null;
      try {
        inputStream = input.getInputStream();
        outputStream = output.getOutputStream();
        ContentFilter.filter(inputStream, outputStream, "text/html", new URI("http://127.0.0.1:8888/"), null, null, null, core.getLinkFilterExceptionProvider());
        inputStream.close();
      inputStream = null;
        outputStream.close();
      outputStream = null;

        bis = output.getInputStream();
        while(bis.available() > 0){
          outsb.append((char)bis.read());
        }
      } catch (IOException e) {
        outsb.append("Bucket error?: " + e.getMessage());
        Logger.error(this, "Bucket error?: " + e, e);
      } catch (URISyntaxException e) {
        outsb.append("Internal error: " + e.getMessage());
        Logger.error(this, "Internal error: " + e, e);
      } finally {
      Closer.close(inputStream);
      Closer.close(outputStream);
      Closer.close(bis);
        input.free();
        output.free();
      }
      outsb.append("\r\n");
    }else if(uline.startsWith("BLOW")) {
      n.getNodeUpdater().blow("caught an  IOException : (Incompetent Operator) :p", true);
      outsb.append("\r\n");
      w.write(outsb.toString());
      w.flush();
      return false;
  } else if(uline.startsWith("SHUTDOWN")) {
    StringBuilder sb = new StringBuilder();
    sb.append("Shutting node down.\r\n");
    w.write(sb.toString());
    w.flush();
    n.exit("Shutdown from console");
  } else if(uline.startsWith("RESTART")) {
    StringBuilder sb = new StringBuilder();
    sb.append("Restarting the node.\r\n");
    w.write(sb.toString());
    w.flush();
    n.getNodeStarter().restart();
  } else if(uline.startsWith("QUIT") && (core.directTMCI == this)) {
    StringBuilder sb = new StringBuilder();
    sb.append("QUIT command not available in console mode.\r\n");
    w.write(sb.toString());
    w.flush();
    return false;
        } else if(uline.startsWith("QUIT")) {
    StringBuilder sb = new StringBuilder();
    sb.append("Closing connection.\r\n");
    w.write(sb.toString());
    w.flush();
    return true;
        } else if(uline.startsWith("MEMSTAT")) {
    Runtime rt = Runtime.getRuntime();
    float freeMemory = rt.freeMemory();
    float totalMemory = rt.totalMemory();
    float maxMemory = rt.maxMemory();

    long usedJavaMem = (long)(totalMemory - freeMemory);
    long allocatedJavaMem = (long)totalMemory;
    long maxJavaMem = (long)maxMemory;
    int availableCpus = rt.availableProcessors();
    NumberFormat thousendPoint = NumberFormat.getInstance();

    ThreadGroup tg = Thread.currentThread().getThreadGroup();
    while(tg.getParent() != null) tg = tg.getParent();
    int threadCount = tg.activeCount();

    StringBuilder sb = new StringBuilder();
    sb.append("Used Java memory:\u00a0" + SizeUtil.formatSize(usedJavaMem, true)+"\r\n");
    sb.append("Allocated Java memory:\u00a0" + SizeUtil.formatSize(allocatedJavaMem, true)+"\r\n");
    sb.append("Maximum Java memory:\u00a0" + SizeUtil.formatSize(maxJavaMem, true)+"\r\n");
    sb.append("Running threads:\u00a0" + thousendPoint.format(threadCount)+"\r\n");
    sb.append("Available CPUs:\u00a0" + availableCpus+"\r\n");
    sb.append("Java Version:\u00a0" + System.getProperty("java.version")+"\r\n");
    sb.append("JVM Vendor:\u00a0" + System.getProperty("java.vendor")+"\r\n");
    sb.append("JVM Version:\u00a0" + System.getProperty("java.version")+"\r\n");
    sb.append("OS Name:\u00a0" + System.getProperty("os.name")+"\r\n");
    sb.append("OS Version:\u00a0" + System.getProperty("os.version")+"\r\n");
    sb.append("OS Architecture:\u00a0" + System.getProperty("os.arch")+"\r\n");
    w.write(sb.toString());
    w.flush();
    return false;
  } else if(uline.startsWith("HELP")) {
    printHeader(w);
    outsb.append("\r\n");
    w.write(outsb.toString());
    w.flush();
    return false;
        } else if(uline.startsWith("PUT:") || (getCHKOnly = uline.startsWith("GETCHK:"))) {
          if(getCHKOnly)
            line = line.substring(("GETCHK:").length()).trim();
          else
            line = line.substring("PUT:".length()).trim();
            String content;
            if(line.length() > 0) {
                // Single line insert
                content = line;
            } else {
                // Multiple line insert
                content = readLines(reader, false);
            }
            // Insert
            byte[] data = content.getBytes(ENCODING);
           
            InsertBlock block = new InsertBlock(new ArrayBucket(data), null, FreenetURI.EMPTY_CHK_URI);

            FreenetURI uri;
            try {
              uri = client.insert(block, getCHKOnly, null);
            } catch (InsertException e) {
                outsb.append("Error: ").append(e.getMessage());
              if(e.uri != null)
                    outsb.append("URI would have been: ").append(e.uri);
              InsertExceptionMode mode = e.getMode();
              if((mode == InsertExceptionMode.FATAL_ERRORS_IN_BLOCKS) || (mode == InsertExceptionMode.TOO_MANY_RETRIES_IN_BLOCKS)) {
                    outsb.append("Splitfile-specific error:\n").append(e.errorCodes.toVerboseString());
              }
    outsb.append("\r\n");
    w.write(outsb.toString());
    w.flush();
              return false;
            }

            outsb.append("URI: ").append(uri);
            ////////////////////////////////////////////////////////////////////////////////
        } else if(uline.startsWith("PUTDIR:") || (uline.startsWith("PUTSSKDIR")) || (getCHKOnly = uline.startsWith("GETCHKDIR:"))) {
          // TODO: Check for errors?
          boolean ssk = false;
          if(uline.startsWith("PUTDIR:"))
            line = line.substring("PUTDIR:".length());
          else if(uline.startsWith("PUTSSKDIR:")) {
            line = line.substring("PUTSSKDIR:".length());
            ssk = true;
          } else if(uline.startsWith("GETCHKDIR:"))
            line = line.substring(("GETCHKDIR:").length());
          else {
            System.err.println("Impossible");
            outsb.append("Impossible");
          }
         
          line = line.trim();
         
          if(line.length() < 1) {
            printHeader(w);
      outsb.append("\r\n");
      w.write(outsb.toString());
      w.flush();
            return false;
          }
         
          String defaultFile = null;
         
          FreenetURI insertURI = FreenetURI.EMPTY_CHK_URI;
         
          // set default file?
          if (line.matches("^.*#.*$")) {
            String[] split = line.split("#");
            if(ssk) {
              insertURI = new FreenetURI(split[0]);
              line = split[1];
              if(split.length > 2)
                defaultFile = split[2];
            } else {
              defaultFile = split[1];
              line = split[0];
            }
          }
         
          HashMap<String, Object> bucketsByName =
            makeBucketsByName(line);
         
          if(defaultFile == null) {
            String[] defaultFiles =
              new String[] { "index.html", "index.htm", "default.html", "default.htm" };
            for(String file: defaultFiles) {
              if(bucketsByName.containsKey(file)) {
                defaultFile = file;
                break;
              }               
            }
          }
         
          FreenetURI uri;
      try {
        uri = client.insertManifest(insertURI, bucketsByName, defaultFile);
        uri = uri.addMetaStrings(new String[] { "" });
            outsb.append("=======================================================");
                outsb.append("URI: ").append(uri);
            outsb.append("=======================================================");
      } catch (InsertException e) {
                outsb.append("Finished insert but: ").append(e.getMessage());
              if(e.uri != null) {
                uri = e.uri;
            uri = uri.addMetaStrings(new String[] { "" });
                    outsb.append("URI would have been: ").append(uri);
              }
              if(e.errorCodes != null) {
                outsb.append("Splitfile errors breakdown:");
                outsb.append(e.errorCodes.toVerboseString());
              }
              Logger.error(this, "Caught "+e, e);
      }
           
        } else if(uline.startsWith("PUTFILE:") || (getCHKOnly = uline.startsWith("GETCHKFILE:"))) {
            // Just insert to local store
          if(getCHKOnly) {
            line = line.substring(("GETCHKFILE:").length()).trim();
          } else {
            line = line.substring("PUTFILE:".length()).trim();
          }
            String mimeType = DefaultMIMETypes.guessMIMEType(line, false);
            if (line.indexOf('#') > -1) {
              String[] splittedLine = line.split("#");
              line = splittedLine[0];
              mimeType = splittedLine[1];
            }
            File f = new File(line);
            outsb.append("Attempting to read file ").append(line);
            long startTime = System.currentTimeMillis();
            try {
              if(!(f.exists() && f.canRead())) {
                throw new FileNotFoundException();
              }
             
              // Guess MIME type
                outsb.append(" using MIME type: ").append(mimeType).append("\r\n");
              if(mimeType.equals(DefaultMIMETypes.DEFAULT_MIME_TYPE))
                mimeType = ""; // don't need to override it
             
              FileBucket fb = new FileBucket(f, true, false, false, false);
              InsertBlock block = new InsertBlock(fb, new ClientMetadata(mimeType), FreenetURI.EMPTY_CHK_URI);

              startTime = System.currentTimeMillis();
              FreenetURI uri = client.insert(block, getCHKOnly, f.getName());
             
              // FIXME depends on CHK's still being renamable
                //uri = uri.setDocName(f.getName());

                outsb.append("URI: ").append(uri).append("\r\n");
              long endTime = System.currentTimeMillis();
                long sz = f.length();
                double rate = 1000.0 * sz / (endTime-startTime);
                outsb.append("Upload rate: ").append(rate).append(" bytes / second\r\n");
            } catch (FileNotFoundException e1) {
                outsb.append("File not found");
            } catch (InsertException e) {
                outsb.append("Finished insert but: ").append(e.getMessage());
              if(e.uri != null) {
                    outsb.append("URI would have been: ").append(e.uri);
                  long endTime = System.currentTimeMillis();
                    long sz = f.length();
                    double rate = 1000.0 * sz / (endTime-startTime);
                    outsb.append("Upload rate: ").append(rate).append(" bytes / second");
              }
              if(e.errorCodes != null) {
                outsb.append("Splitfile errors breakdown:");
                outsb.append(e.errorCodes.toVerboseString());
              }
            } catch (Throwable t) {
                outsb.append("Insert threw: ").append(t);
                t.printStackTrace();
            }
        } else if(uline.startsWith("MAKESSK")) {
          InsertableClientSSK key = InsertableClientSSK.createRandom(r, "");
            outsb.append("Insert URI: ").append(key.getInsertURI().toString(false, false)).append("\r\n");
            outsb.append("Request URI: ").append(key.getURI().toString(false, false)).append("\r\n");
          FreenetURI insertURI = key.getInsertURI().setDocName("testsite");
          String fixedInsertURI = insertURI.toString(false, false);
            outsb.append("Note that you MUST add a filename to the end of the above URLs e.g.:\r\n").append(fixedInsertURI).append("\r\n");
            outsb.append("Normally you will then do PUTSSKDIR:<insert URI>#<directory to upload>, for example:\r\nPUTSSKDIR:").append(fixedInsertURI).append("#directoryToUpload/\r\n");
            outsb.append("This will then produce a manifest site containing all the files, the default document can be accessed at\r\n").append(key.getURI().toString(false, false)).append("testsite/");
        } else if(uline.startsWith("PUTSSK:")) {
          String cmd = line.substring("PUTSSK:".length());
          cmd = cmd.trim();
          if(cmd.indexOf(';') <= 0) {
            outsb.append("No target URI provided.");
            outsb.append("PUTSSK:<insert uri>;<url to redirect to>");
      outsb.append("\r\n");
      w.write(outsb.toString());
      w.flush();
            return false;
          }
          String[] split = cmd.split(";");
          String insertURI = split[0];
          String targetURI = split[1];
            outsb.append("Insert URI: ").append(insertURI);
            outsb.append("Target URI: ").append(targetURI);
          FreenetURI insert = new FreenetURI(insertURI);
          FreenetURI target = new FreenetURI(targetURI);
          try {
        FreenetURI result = client.insertRedirect(insert, target);
                outsb.append("Successfully inserted to fetch URI: ").append(result);
      } catch (InsertException e) {
                outsb.append("Finished insert but: ").append(e.getMessage());
              Logger.normal(this, "Error: "+e, e);
              if(e.uri != null) {
                    outsb.append("URI would have been: ").append(e.uri);
              }
      }
         
        } else if(uline.startsWith("STATUS")) {
          outsb.append("DARKNET:\n");
            SimpleFieldSet fs = n.exportDarknetPublicFieldSet();
            outsb.append(fs.toString());
            if(n.isOpennetEnabled()) {
              outsb.append("OPENNET:\n");
              fs = n.exportOpennetPublicFieldSet();
                outsb.append(fs.toString());
            }
            outsb.append(n.getStatus());
            if(Version.buildNumber()<Version.getHighestSeenBuild()){
                outsb.append("The latest version is : ").append(Version.getHighestSeenBuild());
            }
        } else if(uline.startsWith("ADDPEER:") || uline.startsWith("CONNECT:")) {
            String key = null;
            if(uline.startsWith("CONNECT:")) {
                key = line.substring("CONNECT:".length()).trim();
            } else {
                key = line.substring("ADDPEER:".length()).trim();
            }
           
            String content = null;
            if(key.length() > 0) {
                // Filename
              BufferedReader in;
                outsb.append("Trying to add peer to node by noderef in ").append(key).append("\r\n");
                File f = new File(key);
                if (f.isFile()) {
                  outsb.append("Given string seems to be a file, loading...\r\n");
                  in = new BufferedReader(new InputStreamReader(new FileInputStream(f), ENCODING));
                    content = readLines(in, true);
                    in.close();
                } else {
                  outsb.append("Given string seems to be an URL, loading...\r\n");
                    URL url = new URL(key);
                    content = AddPeer.getReferenceFromURL(url).toString();
                }
            } else {
                content = readLines(reader, true);
            }
            if(content == null) return false;
            if(content.equals("")) return false;
            addPeer(content);
       
        } else if(uline.startsWith("NAME:")) {
            outsb.append("Node name currently: ").append(n.getMyName());
            String key = line.substring("NAME:".length()).trim();
            outsb.append("New name: ").append(key);
           
            try{
              n.setName(key);
                if(logMINOR)
                  Logger.minor(this, "Setting node.name to "+key);
            }catch(Exception e){
              Logger.error(this, "Error setting node's name", e);
        }
            core.storeConfig();
        } else if(uline.startsWith("DISABLEPEER:")) {
          String nodeIdentifier = (line.substring("DISABLEPEER:".length())).trim();
          if(!havePeer(nodeIdentifier)) {
            w.write(("no peer for "+nodeIdentifier+"\r\n"));
            w.flush();
            return false;
          }
          if(disablePeer(nodeIdentifier)) {
                outsb.append("disable succeeded for ").append(nodeIdentifier);
          } else {
                outsb.append("disable failed for ").append(nodeIdentifier);
          }
          outsb.append("\r\n");
        } else if(uline.startsWith("ENABLEPEER:")) {
          String nodeIdentifier = (line.substring("ENABLEPEER:".length())).trim();
          if(!havePeer(nodeIdentifier)) {
            w.write(("no peer for "+nodeIdentifier+"\r\n"));
            w.flush();
            return false;
          }
          if(enablePeer(nodeIdentifier)) {
                outsb.append("enable succeeded for ").append(nodeIdentifier);
          } else {
                outsb.append("enable failed for ").append(nodeIdentifier);
          }
          outsb.append("\r\n");
    } else if(uline.startsWith("SETPEERLISTENONLY:")) {
      String nodeIdentifier = (line.substring("SETPEERLISTENONLY:".length())).trim();
          if(!havePeer(nodeIdentifier)) {
            w.write(("no peer for "+nodeIdentifier+"\r\n"));
            w.flush();
            return false;
          }
      PeerNode pn = n.getPeerNode(nodeIdentifier);
          if(pn == null) {
            w.write(("n.getPeerNode() failed to get peer details for "+nodeIdentifier+"\r\n\r\n"));
            w.flush();
            return false;
          }
      if(!(pn instanceof DarknetPeerNode)) {
        w.write(("Error: "+nodeIdentifier+" identifies a non-darknet peer and this command is only available for darknet peers\r\n\r\n"));
        w.flush();
        return false;
      }
      DarknetPeerNode dpn = (DarknetPeerNode) pn;
      dpn.setListenOnly(true);
            outsb.append("set ListenOnly suceeded for ").append(nodeIdentifier).append("\r\n");
    } else if(uline.startsWith("UNSETPEERLISTENONLY:")) {
      String nodeIdentifier = (line.substring("UNSETPEERLISTENONLY:".length())).trim();
          if(!havePeer(nodeIdentifier)) {
            w.write(("no peer for "+nodeIdentifier+"\r\n"));
            w.flush();
            return false;
          }
      PeerNode pn = n.getPeerNode(nodeIdentifier);
          if(pn == null) {
            w.write(("n.getPeerNode() failed to get peer details for "+nodeIdentifier+"\r\n\r\n"));
            w.flush();
            return false;
          }
      if(!(pn instanceof DarknetPeerNode)) {
        w.write(("Error: "+nodeIdentifier+" identifies a non-darknet peer and this command is only available for darknet peers\r\n\r\n"));
        w.flush();
        return false;
      }
      DarknetPeerNode dpn = (DarknetPeerNode) pn;
      dpn.setListenOnly(false);
            outsb.append("unset ListenOnly suceeded for ").append(nodeIdentifier).append("\r\n");
        } else if(uline.startsWith("HAVEPEER:")) {
          String nodeIdentifier = (line.substring("HAVEPEER:".length())).trim();
          if(havePeer(nodeIdentifier)) {
                outsb.append("true for ").append(nodeIdentifier);
          } else {
                outsb.append("false for ").append(nodeIdentifier);
          }
          outsb.append("\r\n");
        } else if(uline.startsWith("REMOVEPEER:") || uline.startsWith("DISCONNECT:")) {
          String nodeIdentifier = null;
          if(uline.startsWith("DISCONNECT:")) {
            nodeIdentifier = line.substring("DISCONNECT:".length());
          } else {
            nodeIdentifier = line.substring("REMOVEPEER:".length());
          }
          if(removePeer(nodeIdentifier)) {
                outsb.append("peer removed for ").append(nodeIdentifier);
          } else {
                outsb.append("peer removal failed for ").append(nodeIdentifier);
          }
          outsb.append("\r\n");
        } else if(uline.startsWith("PEER:")) {
          String nodeIdentifier = (line.substring("PEER:".length())).trim();
          if(!havePeer(nodeIdentifier)) {
            w.write(("no peer for "+nodeIdentifier+"\r\n"));
            w.flush();
            return false;
          }
          PeerNode pn = n.getPeerNode(nodeIdentifier);
          if(pn == null) {
            w.write(("n.getPeerNode() failed to get peer details for "+nodeIdentifier+"\r\n\r\n"));
            w.flush();
            return false;
          }
          SimpleFieldSet fs = pn.exportFieldSet();
          outsb.append(fs.toString());
        } else if(uline.startsWith("PEERWMD:")) {
          String nodeIdentifier = (line.substring("PEERWMD:".length())).trim();
          if(!havePeer(nodeIdentifier)) {
            w.write(("no peer for "+nodeIdentifier+"\r\n"));
            w.flush();
            return false;
          }
          PeerNode pn = n.getPeerNode(nodeIdentifier);
          if(pn == null) {
            w.write(("n.getPeerNode() failed to get peer details for "+nodeIdentifier+"\r\n\r\n"));
            w.flush();
            return false;
          }
          SimpleFieldSet fs = pn.exportFieldSet();
          SimpleFieldSet meta = pn.exportMetadataFieldSet(System.currentTimeMillis());
          if(!meta.isEmpty())
             fs.put("metadata", meta);
          outsb.append(fs.toString());
        } else if(uline.startsWith("PEERS")) {
          outsb.append(n.getTMCIPeerList());
          outsb.append("PEERS done.\r\n");
        } else if(uline.startsWith("PLUGLOAD")) {
          if(uline.startsWith("PLUGLOAD:O:")) {
            String name = line.substring("PLUGLOAD:O:".length()).trim();
            n.pluginManager.startPluginOfficial(name, true, false, false);
          } else if(uline.startsWith("PLUGLOAD:F:")) {
            String name = line.substring("PLUGLOAD:F:".length()).trim();
            n.pluginManager.startPluginFile(name, true);
          } else if(uline.startsWith("PLUGLOAD:U:")) {
            String name = line.substring("PLUGLOAD:U:".length()).trim();
            n.pluginManager.startPluginURL(name, true);
          } else if(uline.startsWith("PLUGLOAD:K:")) {
            String name = line.substring("PLUGLOAD:K:".length()).trim();
            n.pluginManager.startPluginFreenet(name, true);
          } else {
            outsb.append("  PLUGLOAD:O: pluginName         - Load official plugin from freenetproject.org\r\n");
            outsb.append("  PLUGLOAD:F: file://<filename>  - Load plugin from file\r\n");
            outsb.append("  PLUGLOAD:U: http://...         - Load plugin from online file\r\n");
            outsb.append("  PLUGLOAD:K: freenet key        - Load plugin from freenet uri\r\n");
          }
        } else if(uline.startsWith("PLUGLIST")) {
          outsb.append(n.pluginManager.dumpPlugins());
        } else if(uline.startsWith("PLUGKILL:")) {
          n.pluginManager.killPlugin(line.substring("PLUGKILL:".length()).trim(), MINUTES.toMillis(1), false);
        } else if(uline.startsWith("ANNOUNCE")) {
          OpennetManager om = n.getOpennet();
          if(om == null) {
            outsb.append("OPENNET DISABLED, cannot announce.");
            return false;
          }
          uline = uline.substring("ANNOUNCE".length());
          final double target;
          if(uline.charAt(0) == ':') {
            target = Double.parseDouble(uline.substring(1));
          } else {
            target = n.random.nextDouble();
          }
          om.announce(target, new AnnouncementCallback() {
            private void write(String msg) {
              try {
                w.write(("ANNOUNCE:"+target+":"+msg+"\r\n"));
                w.flush();
              } catch (IOException e) {
                // Ignore
              }
            }
        @Override
        public void addedNode(PeerNode pn) {
          write("Added node "+pn.shortToString());
        }

        @Override
        public void bogusNoderef(String reason) {
          write("Bogus noderef: "+reason);
        }

        @Override
        public void completed() {
          write("Completed announcement.");
        }

        @Override
        public void nodeFailed(PeerNode pn, String reason) {
          write("Node failed: "+pn+" "+reason);
        }

        @Override
        public void noMoreNodes() {
          write("Route Not Found");
        }
       
        @Override
        public void nodeNotWanted() {
          write("Hop doesn't want me.");
        }
        @Override
        public void nodeNotAdded() {
          write("Node not added as we don't want it for some reason.");
        }
        @Override
        public void acceptedSomewhere() {
          write("Announcement accepted by some node.");
        }
        @Override
        public void relayedNoderef() {
          write("Announcement returned a noderef that we relayed downstream. THIS SHOULD NOT HAPPEN!");
        }
           
          });
        } else {
          if(uline.length() > 0)
            printHeader(w);
        }
        outsb.append("\r\n");
        w.write(outsb.toString());
        w.flush();
        return false;
    }

  /**
     * Create a map of String -> Bucket for every file in a directory
     * and its subdirs.
     */
    private HashMap<String, Object> makeBucketsByName(String directory) {
     
      if (!directory.endsWith("/"))
        directory = directory + '/';
      File thisdir = new File(directory);
     
      System.out.println("Listing dir: "+thisdir);
     
      HashMap<String, Object> ret = new HashMap<String, Object>();
     
      File filelist[] = thisdir.listFiles();
      if(filelist == null)
        throw new IllegalArgumentException("No such directory");
      for(int i = 0 ; i < filelist.length ; i++) {
                //   Skip unreadable files and dirs
    //   Skip files nonexistant (dangling symlinks) - check last
          if (filelist[i].canRead() && filelist[i].exists()) {     
        if (filelist[i].isFile()) {
          File f = filelist[i];
         
          FileBucket bucket = new FileBucket(f, true, false, false, false);
         
          ret.put(f.getName(), bucket);
        } else if(filelist[i].isDirectory()) {
          HashMap<String, Object> subdir = makeBucketsByName(directory + filelist[i].getName());
          ret.put(filelist[i].getName(), subdir);
        }
    }
      }
      return ret;
  }

    /**
     * @return A block of text, input from stdin, ending with a
     * . on a line by itself. Does some mangling for a fieldset if
     * isFieldSet.
     */
    private String readLines(BufferedReader reader, boolean isFieldSet) {
        StringBuilder sb = new StringBuilder(1000);
        boolean breakflag = false;
        while(true) {
            String line;
            try {
                line = reader.readLine();
                if(line == null) throw new EOFException();
            } catch (IOException e1) {
                System.err.println("Bye... ("+e1+ ')');
                return null;
            }
            if((!isFieldSet) && line.equals(".")) break;
            if(isFieldSet) {
                // Mangling
                // First trim
                line = line.trim();
                if(line.equals("End")) {
                    breakflag = true;
                } else {
                    if(line.endsWith("End") &&
                            Character.isWhitespace(line.charAt(line.length()-("End".length()+1)))) {
                        line = "End";
                        breakflag = true;
                    } else {
                        int idx = line.indexOf('=');
                        if(idx < 0) {
                            System.err.println("No = and no End in line: "+line);
                            return "";
                        } else {
                            if(idx > 0) {
                                String after;
                                if(idx == line.length()-1)
                                    after = "";
                                else
                                    after = line.substring(idx+1);
                                String before = line.substring(0, idx);
                                before = before.trim();
                                int x = 0;
                                for(int j=before.length()-1;j>=0;j--) {
                                    char c = before.charAt(j);
                                    if((c == '.') || Character.isLetterOrDigit(c)) {
                                        // Valid character for field
                                    } else {
                                        x=j+1;
                                        break;
                                    }
                                }
                                before = before.substring(x);
                                line = before + '=' + after;
                                //System.out.println(line);
                            } else {
                                System.err.println("Invalid empty field name");
                                breakflag = true;
                            }
                        }
                    }
                }
            }
            sb.append(line).append("\r\n");
            if(breakflag) break;
        }
        return sb.toString();
    }

    /**
     * Add a peer to the node, given its reference.
     */
    private void addPeer(String content) {
        SimpleFieldSet fs;
        System.out.println("Connecting to:\r\n"+content);
        try {
            fs = new SimpleFieldSet(content, false, true, false);
        } catch (IOException e) {
            System.err.println("Did not parse: "+e);
            e.printStackTrace();
            return;
        }
        PeerNode pn;
        try {
            pn = n.createNewDarknetNode(fs, FRIEND_TRUST.NORMAL, FRIEND_VISIBILITY.NO);
        } catch (FSParseException e1) {
            System.err.println("Did not parse: "+e1);
            Logger.error(this, "Did not parse: "+e1, e1);
            return;
        } catch (PeerParseException e1) {
            System.err.println("Did not parse: "+e1);
            Logger.error(this, "Did not parse: "+e1, e1);
            return;
        } catch (ReferenceSignatureVerificationException e1) {
          System.err.println("Did not parse: "+e1);
            Logger.error(this, "Did not parse: "+e1, e1);
            return;
    }
        if(n.peers.addPeer(pn))
            System.out.println("Added peer: "+pn);
        n.peers.writePeersDarknetUrgent();
    }

  /**
   * Disable connecting to a peer given its ip and port, name or identity, as a String
   * Report peer success as boolean
   */
  private boolean disablePeer(String nodeIdentifier) {
    for(DarknetPeerNode pn: n.peers.getDarknetPeers())
    {
      Peer peer = pn.getPeer();
      String nodeIpAndPort = "";
      if(peer != null) {
        nodeIpAndPort = peer.toString();
      }
      String name = pn.myName;
      String identity = pn.getIdentityString();
      if(identity.equals(nodeIdentifier) || nodeIpAndPort.equals(nodeIdentifier) || name.equals(nodeIdentifier)) {
        pn.disablePeer();
        return true;
      }
    }
    return false;
  }

  /**
   * Enable connecting to a peer given its ip and port, name or identity, as a String
   * Report peer success as boolean
   */
  private boolean enablePeer(String nodeIdentifier) {
    for(DarknetPeerNode pn: n.peers.getDarknetPeers())
    {
      Peer peer = pn.getPeer();
      String nodeIpAndPort = "";
      if(peer != null) {
        nodeIpAndPort = peer.toString();
      }
      String name = pn.myName;
      String identity = pn.getIdentityString();
      if(identity.equals(nodeIdentifier) || nodeIpAndPort.equals(nodeIdentifier) || name.equals(nodeIdentifier)) {
        pn.enablePeer();
        return true;
      }
    }
    return false;
  }
   
    /**
     * Check for a peer of the node given its ip and port, name or identity, as a String
     * Report peer existence as boolean
     */
    private boolean havePeer(String nodeIdentifier) {
      for(DarknetPeerNode pn: n.peers.getDarknetPeers())
      {
        Peer peer = pn.getPeer();
        String nodeIpAndPort = "";
        if(peer != null) {
          nodeIpAndPort = peer.toString();
        }
        String name = pn.myName;
        String identity = pn.getIdentityString();
        if(identity.equals(nodeIdentifier) || nodeIpAndPort.equals(nodeIdentifier) || name.equals(nodeIdentifier))
        {
          return true;
        }
      }
      return false;
    }
   
    /**
     * Remove a peer from the node given its ip and port, name or identity, as a String
     * Report peer removal successfulness as boolean
     */
    private boolean removePeer(String nodeIdentifier) {
      System.out.println("Removing peer from node for: "+nodeIdentifier);
      for(DarknetPeerNode pn: n.peers.getDarknetPeers())
      {
        Peer peer = pn.getPeer();
        String nodeIpAndPort = "";
        if(peer != null) {
            nodeIpAndPort = peer.toString();
        }
        String name = pn.myName;
        String identity = pn.getIdentityString();
        if(identity.equals(nodeIdentifier) || nodeIpAndPort.equals(nodeIdentifier) || name.equals(nodeIdentifier))
        {
          n.removePeerConnection(pn);
          return true;
        }
      }
      System.out.println("No node in peers list for: "+nodeIdentifier);
      return false;
    }

    private String sanitize(String fnam) {
      if(fnam == null) return "";
        StringBuilder sb = new StringBuilder(fnam.length());
        for(int i=0;i<fnam.length();i++) {
            char c = fnam.charAt(i);
            if(Character.isLetterOrDigit(c) || (c == '-') || (c == '.'))
                sb.append(c);
        }
        return sb.toString();
    }

}
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