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src/org/sonews/daemon/command/ArticleCommand.java
author František Kučera <franta-hg@frantovo.cz>
Wed Dec 31 12:07:40 2014 +0100 (2014-12-31)
changeset 120 bb1c8a7b774c
parent 48 b78e77619152
permissions -rwxr-xr-x
XSLT: licence – GNU GPLv3 
     1 /*

     2  *   SONEWS News Server

     3  *   see AUTHORS for the list of contributors

     4  *

     5  *   This program is free software: you can redistribute it and/or modify

     6  *   it under the terms of the GNU General Public License as published by

     7  *   the Free Software Foundation, either version 3 of the License, or

     8  *   (at your option) any later version.

     9  *

    10  *   This program is distributed in the hope that it will be useful,

    11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13  *   GNU General Public License for more details.

    14  *

    15  *   You should have received a copy of the GNU General Public License

    16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 package org.sonews.daemon.command;

    19 

    20 import java.io.IOException;

    21 import org.sonews.storage.Article;

    22 import org.sonews.daemon.NNTPConnection;

    23 import org.sonews.storage.Group;

    24 import org.sonews.storage.StorageBackendException;

    25 

    26 /**

    27  * Class handling the ARTICLE, BODY and HEAD commands.

    28  * @author Christian Lins

    29  * @author Dennis Schwerdel

    30  * @since n3tpd/0.1

    31  */

    32 public class ArticleCommand implements Command {

    33 

    34 	@Override

    35 	public String[] getSupportedCommandStrings() {

    36 		return new String[]{"ARTICLE", "BODY", "HEAD"};

    37 	}

    38 

    39 	@Override

    40 	public boolean hasFinished() {

    41 		return true;

    42 	}

    43 

    44 	@Override

    45 	public String impliedCapability() {

    46 		return null;

    47 	}

    48 

    49 	@Override

    50 	public boolean isStateful() {

    51 		return false;

    52 	}

    53 

    54 	// TODO: Refactor this method to reduce its complexity!

    55 	@Override

    56 	public void processLine(NNTPConnection conn, final String line, byte[] raw)

    57 			throws IOException {

    58 		final String[] command = line.split(" ");

    59 

    60 		Article article = null;

    61 		long artIndex = -1;

    62 		if (command.length == 1) {

    63 			article = conn.getCurrentArticle();

    64 			if (article == null) {

    65 				conn.println("420 no current article has been selected");

    66 				return;

    67 			}

    68 		} else if (command[1].matches(NNTPConnection.MESSAGE_ID_PATTERN)) {

    69 			// Message-ID

    70 			article = Article.getByMessageID(command[1]);

    71 			if (article == null) {

    72 				conn.println("430 no such article found");

    73 				return;

    74 			}

    75 		} else {

    76 			// Message Number

    77 			try {

    78 				Group currentGroup = conn.getCurrentChannel();

    79 				if (currentGroup == null) {

    80 					conn.println("400 no group selected");

    81 					return;

    82 				}

    83 

    84 				artIndex = Long.parseLong(command[1]);

    85 				article = currentGroup.getArticle(artIndex);

    86 			} catch (NumberFormatException ex) {

    87 				ex.printStackTrace();

    88 			} catch (StorageBackendException ex) {

    89 				ex.printStackTrace();

    90 			}

    91 

    92 			if (article == null) {

    93 				conn.println("423 no such article number in this group");

    94 				return;

    95 			}

    96 			conn.setCurrentArticle(article);

    97 		}

    98 

    99 		if (command[0].equalsIgnoreCase("ARTICLE")) {

   100 			conn.println("220 " + artIndex + " " + article.getMessageID()

   101 					+ " article retrieved - head and body follow");

   102 			conn.println(article.getHeaderSource());

   103 			conn.println("");

   104 			conn.printlnEscapeDots(article.getBody());

   105 			conn.println(".");

   106 		} else if (command[0].equalsIgnoreCase("BODY")) {

   107 			conn.println("222 " + artIndex + " " + article.getMessageID() + " body");

   108 			conn.printlnEscapeDots(article.getBody());

   109 			conn.println(".");

   110 		} /*

   111 		 * HEAD: This command is mandatory.

   112 		 *

   113 		 * Syntax

   114 		 *    HEAD message-id

   115 		 *    HEAD number

   116 		 *    HEAD

   117 		 *

   118 		 * Responses

   119 		 *

   120 		 * First form (message-id specified)

   121 		 *  221 0|n message-id    Headers follow (multi-line)

   122 		 *  430                   No article with that message-id

   123 		 *

   124 		 * Second form (article number specified)

   125 		 *  221 n message-id      Headers follow (multi-line)

   126 		 *  412                   No newsgroup selected

   127 		 *  423                   No article with that number

   128 		 *

   129 		 * Third form (current article number used)

   130 		 *  221 n message-id      Headers follow (multi-line)

   131 		 *  412                   No newsgroup selected

   132 		 *  420                   Current article number is invalid

   133 		 *

   134 		 * Parameters

   135 		 *  number        Requested article number

   136 		 *  n             Returned article number

   137 		 *  message-id    Article message-id

   138 		 */ else if (command[0].equalsIgnoreCase("HEAD")) {

   139 			conn.println("221 " + artIndex + " " + article.getMessageID()

   140 					+ " Headers follow (multi-line)");

   141 			conn.println(article.getHeaderSource());

   142 			conn.println(".");

   143 		}

   144 	}

   145 }
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