diff -r 6ae5e4f8329b -r c404a87db5b7 src/org/sonews/daemon/command/ArticleCommand.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/sonews/daemon/command/ArticleCommand.java	Sun Aug 29 17:43:58 2010 +0200
@@ -0,0 +1,174 @@
+/*
+ *   SONEWS News Server
+ *   see AUTHORS for the list of contributors
+ *
+ *   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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sonews.daemon.command;
+
+import java.io.IOException;
+import org.sonews.storage.Article;
+import org.sonews.daemon.NNTPConnection;
+import org.sonews.storage.Channel;
+import org.sonews.storage.StorageBackendException;
+
+/**
+ * Class handling the ARTICLE, BODY and HEAD commands.
+ * @author Christian Lins
+ * @author Dennis Schwerdel
+ * @since n3tpd/0.1
+ */
+public class ArticleCommand implements Command
+{
+
+  @Override
+  public String[] getSupportedCommandStrings()
+  {
+    return new String[] {"ARTICLE", "BODY", "HEAD"};
+  }
+
+  @Override
+  public boolean hasFinished()
+  {
+    return true;
+  }
+
+  @Override
+  public String impliedCapability()
+  {
+    return null;
+  }
+
+  @Override
+  public boolean isStateful()
+  {
+    return false;
+  }
+
+  // TODO: Refactor this method to reduce its complexity!
+  @Override
+  public void processLine(NNTPConnection conn, final String line, byte[] raw)
+    throws IOException
+  {
+    final String[] command = line.split(" ");
+    
+    Article article  = null;
+    long    artIndex = -1;
+    if (command.length == 1)
+    {
+      article = conn.getCurrentArticle();
+      if (article == null)
+      {
+        conn.println("420 no current article has been selected");
+        return;
+      }
+    }
+    else if (command[1].matches(NNTPConnection.MESSAGE_ID_PATTERN))
+    {
+      // Message-ID
+      article = Article.getByMessageID(command[1]);
+      if (article == null)
+      {
+        conn.println("430 no such article found");
+        return;
+      }
+    }
+    else
+    {
+      // Message Number
+      try
+      {
+        Channel currentGroup = conn.getCurrentChannel();
+        if(currentGroup == null)
+        {
+          conn.println("400 no group selected");
+          return;
+        }
+        
+        artIndex = Long.parseLong(command[1]);
+        article  = currentGroup.getArticle(artIndex);
+      }
+      catch(NumberFormatException ex)
+      {
+        ex.printStackTrace();
+      }
+      catch(StorageBackendException ex)
+      {
+        ex.printStackTrace();
+      }
+
+      if (article == null)
+      {
+        conn.println("423 no such article number in this group");
+        return;
+      }
+      conn.setCurrentArticle(article);
+    }
+
+    if(command[0].equalsIgnoreCase("ARTICLE"))
+    {
+      conn.println("220 " + artIndex + " " + article.getMessageID()
+          + " article retrieved - head and body follow");
+      conn.println(article.getHeaderSource());
+      conn.println("");
+      conn.println(article.getBody());
+      conn.println(".");
+    }
+    else if(command[0].equalsIgnoreCase("BODY"))
+    {
+      conn.println("222 " + artIndex + " " + article.getMessageID() + " body");
+      conn.println(article.getBody());
+      conn.println(".");
+    }
+    
+    /*
+     * HEAD: This command is mandatory.
+     *
+     * Syntax
+     *    HEAD message-id
+     *    HEAD number
+     *    HEAD
+     *
+     * Responses
+     *
+     * First form (message-id specified)
+     *  221 0|n message-id    Headers follow (multi-line)
+     *  430                   No article with that message-id
+     *
+     * Second form (article number specified)
+     *  221 n message-id      Headers follow (multi-line)
+     *  412                   No newsgroup selected
+     *  423                   No article with that number
+     *
+     * Third form (current article number used)
+     *  221 n message-id      Headers follow (multi-line)
+     *  412                   No newsgroup selected
+     *  420                   Current article number is invalid
+     *
+     * Parameters
+     *  number        Requested article number
+     *  n             Returned article number
+     *  message-id    Article message-id
+     */
+    else if(command[0].equalsIgnoreCase("HEAD"))
+    {
+      conn.println("221 " + artIndex + " " + article.getMessageID()
+          + " Headers follow (multi-line)");
+      conn.println(article.getHeaderSource());
+      conn.println(".");
+    }
+  }  
+  
+}