org/sonews/web/AbstractSonewsServlet.java
author chris <chris@marvin>
Wed, 01 Jul 2009 10:48:22 +0200
changeset 2 1090e2141798
parent 1 6fceb66e1ad7
permissions -rw-r--r--
sonews/0.5.1 fixes merged
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/*
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 *   SONEWS News Server
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 *   see AUTHORS for the list of contributors
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 *
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 *   This program is free software: you can redistribute it and/or modify
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 *   it under the terms of the GNU General Public License as published by
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 *   the Free Software Foundation, either version 3 of the License, or
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 *   (at your option) any later version.
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 *
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 *   This program is distributed in the hope that it will be useful,
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *   GNU General Public License for more details.
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 *
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 *   You should have received a copy of the GNU General Public License
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 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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package org.sonews.web;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.PrintWriter;
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import java.net.Socket;
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import javax.servlet.http.HttpServlet;
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import org.sonews.util.StringTemplate;
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import org.sonews.util.io.Resource;
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/**
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 * Base class for all sonews servlets.
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 * @author Christian Lins
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 * @since sonews/0.5.0
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 */
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public class AbstractSonewsServlet extends HttpServlet
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{
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  public static final String TemplateRoot = "org/sonews/web/tmpl/";
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  protected String        hello = null;
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  private BufferedReader  in     = null;
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  private PrintWriter     out    = null;
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  private Socket          socket = null;
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  protected void connectToNewsserver()
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    throws IOException
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  {
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    // Get sonews port from properties
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    String port = System.getProperty("sonews.port", "9119");
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    String host = System.getProperty("sonews.host", "localhost");
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    try
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    {
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      this.socket = new Socket(host, Integer.parseInt(port));
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      this.in     = new BufferedReader(
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        new InputStreamReader(socket.getInputStream()));
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      this.out = new PrintWriter(socket.getOutputStream());
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      hello = in.readLine(); // Read hello message
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    }
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    catch(IOException ex)
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    {
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      System.out.println("sonews.host=" + host);
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      System.out.println("sonews.port=" + port);
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      System.out.flush();
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      throw ex;
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    }
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  }
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  protected void disconnectFromNewsserver()
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  {
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    try
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    {
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      printlnToNewsserver("QUIT");
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      out.close();
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      readlnFromNewsserver(); // Wait for bye message
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      in.close();
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      socket.close();
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    }
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    catch(IOException ex)
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    {
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      ex.printStackTrace();
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    }
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  }
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  protected StringTemplate getTemplate(String res)
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  {
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    StringTemplate tmpl = new StringTemplate(
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      Resource.getAsString(TemplateRoot + "AbstractSonewsServlet.tmpl", true));
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    String content    = Resource.getAsString(TemplateRoot + res, true);
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    String stylesheet = System.getProperty("sonews.web.stylesheet", "style.css");
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    tmpl.set("CONTENT", content);
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    tmpl.set("STYLESHEET", stylesheet);
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    return new StringTemplate(tmpl.toString());
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  }
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  protected void printlnToNewsserver(final String line)
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  {
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    this.out.println(line);
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    this.out.flush();
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  }
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  protected String readlnFromNewsserver()
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    throws IOException
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  {
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    return this.in.readLine();
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  }
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}