1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/org/sonews/daemon/command/CapabilitiesCommand.java	Sun Aug 29 17:43:58 2010 +0200
     1.3 @@ -0,0 +1,93 @@
     1.4 +/*
     1.5 + *   SONEWS News Server
     1.6 + *   see AUTHORS for the list of contributors
     1.7 + *
     1.8 + *   This program is free software: you can redistribute it and/or modify
     1.9 + *   it under the terms of the GNU General Public License as published by
    1.10 + *   the Free Software Foundation, either version 3 of the License, or
    1.11 + *   (at your option) any later version.
    1.12 + *
    1.13 + *   This program is distributed in the hope that it will be useful,
    1.14 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 + *   GNU General Public License for more details.
    1.17 + *
    1.18 + *   You should have received a copy of the GNU General Public License
    1.19 + *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 + */
    1.21 +
    1.22 +package org.sonews.daemon.command;
    1.23 +
    1.24 +import java.io.IOException;
    1.25 +import org.sonews.daemon.NNTPConnection;
    1.26 +
    1.27 +/**
    1.28 + * <pre>
    1.29 + *  The CAPABILITIES command allows a client to determine the
    1.30 + *  capabilities of the server at any given time.
    1.31 + *
    1.32 + *  This command MAY be issued at any time; the server MUST NOT require
    1.33 + *  it to be issued in order to make use of any capability. The response
    1.34 + *  generated by this command MAY change during a session because of
    1.35 + *  other state information (which, in turn, may be changed by the
    1.36 + *  effects of other commands or by external events).  An NNTP client is
    1.37 + *  only able to get the current and correct information concerning
    1.38 + *  available capabilities at any point during a session by issuing a
    1.39 + *  CAPABILITIES command at that point of that session and processing the
    1.40 + *  response.
    1.41 + * </pre>
    1.42 + * @author Christian Lins
    1.43 + * @since sonews/0.5.0
    1.44 + */
    1.45 +public class CapabilitiesCommand implements Command
    1.46 +{
    1.47 +
    1.48 +  static final String[] CAPABILITIES = new String[]
    1.49 +    {
    1.50 +      "VERSION 2", // MUST be the first one; VERSION 2 refers to RFC3977
    1.51 +      "READER",    // Server implements commands for reading
    1.52 +      "POST",      // Server implements POST command
    1.53 +      "OVER"       // Server implements OVER command
    1.54 +    };
    1.55 +
    1.56 +  @Override
    1.57 +  public String[] getSupportedCommandStrings()
    1.58 +  {
    1.59 +    return new String[] {"CAPABILITIES"};
    1.60 +  }
    1.61 +
    1.62 +  /**
    1.63 +   * First called after one call to processLine().
    1.64 +   * @return
    1.65 +   */
    1.66 +  @Override
    1.67 +  public boolean hasFinished()
    1.68 +  {
    1.69 +    return true;
    1.70 +  }
    1.71 +
    1.72 +  @Override
    1.73 +  public String impliedCapability()
    1.74 +  {
    1.75 +    return null;
    1.76 +  }
    1.77 +  
    1.78 +  @Override
    1.79 +  public boolean isStateful()
    1.80 +  {
    1.81 +    return false;
    1.82 +  }
    1.83 +
    1.84 +  @Override
    1.85 +  public void processLine(NNTPConnection conn, final String line, byte[] raw)
    1.86 +    throws IOException
    1.87 +  {
    1.88 +    conn.println("101 Capabilities list:");
    1.89 +    for(String cap : CAPABILITIES)
    1.90 +    {
    1.91 +      conn.println(cap);
    1.92 +    }
    1.93 +    conn.println(".");
    1.94 +  }
    1.95 +
    1.96 +}