src/org/sonews/daemon/command/XDaemonCommand.java
author František Kučera <franta-hg@frantovo.cz>
Sun, 06 Nov 2011 00:08:05 +0100
changeset 116 4ddc1020a154
parent 62 be4e87479855
permissions -rwxr-xr-x
Podpora Markdown syntaxe
na začátek odesílané zprávy stačí přidat:
#!markdown
a zpráva se pak prožene Markdown procesorem (spouštěno přes sudo pod jiným uživatelem)
a pak teprve přes standardní XSL transformaci.

1) Vytvořit uživatele a skupinu markdown

2) Do /etc/sudoers přidat:
Cmnd_Alias MARKDOWN = /usr/bin/markdown
%markdown ALL = (%markdown) NOPASSWD : MARKDOWN

3) Uivatele, pod kterým běží NNTP démon, přidat do skupiny markdown
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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.daemon.command;
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.util.List;
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import org.sonews.config.Config;
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import org.sonews.daemon.NNTPConnection;
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import org.sonews.storage.StorageBackendException;
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import org.sonews.storage.StorageManager;
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import org.sonews.feed.FeedManager;
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import org.sonews.feed.Subscription;
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import org.sonews.storage.Group;
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import org.sonews.util.Stats;
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/**
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 * The XDAEMON command allows a client to get/set properties of the
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 * running server daemon. Only locally connected clients are allowed to
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 * use this command.
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 * The restriction to localhost connection can be suppressed by overriding
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 * the sonews.xdaemon.host bootstrap config property.
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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 XDaemonCommand implements Command {
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	@Override
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	public String[] getSupportedCommandStrings() {
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		return new String[]{"XDAEMON"};
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	}
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	@Override
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	public boolean hasFinished() {
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		return true;
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	}
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	@Override
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	public String impliedCapability() {
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		return null;
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	}
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	@Override
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	public boolean isStateful() {
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		return false;
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	}
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	private void channelAdd(String[] commands, NNTPConnection conn)
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			throws IOException, StorageBackendException {
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		String groupName = commands[2];
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		if (StorageManager.current().isGroupExisting(groupName)) {
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			conn.println("400 group " + groupName + " already existing!");
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		} else {
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			StorageManager.current().addGroup(groupName, Integer.parseInt(commands[3]));
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			conn.println("200 group " + groupName + " created");
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		}
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	}
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	// TODO: Refactor this method to reduce complexity!
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	@Override
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	public void processLine(NNTPConnection conn, String line, byte[] raw)
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			throws IOException, StorageBackendException {
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		InetSocketAddress addr = (InetSocketAddress)conn.getSocketChannel()
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				.socket().getRemoteSocketAddress();
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		if (addr.getHostName().equals(
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				Config.inst().get(Config.XDAEMON_HOST, "localhost"))) {
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			String[] commands = line.split(" ", 4);
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			if (commands.length == 3 && commands[1].equalsIgnoreCase("LIST")) {
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				if (commands[2].equalsIgnoreCase("CONFIGKEYS")) {
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					conn.println("100 list of available config keys follows");
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					for (String key : Config.AVAILABLE_KEYS) {
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						conn.println(key);
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					}
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("PEERINGRULES")) {
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					List<Subscription> pull =
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							StorageManager.current().getSubscriptions(FeedManager.TYPE_PULL);
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					List<Subscription> push =
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							StorageManager.current().getSubscriptions(FeedManager.TYPE_PUSH);
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					conn.println("100 list of peering rules follows");
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					for (Subscription sub : pull) {
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						conn.println("PULL " + sub.getHost() + ":" + sub.getPort()
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								+ " " + sub.getGroup());
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					}
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					for (Subscription sub : push) {
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						conn.println("PUSH " + sub.getHost() + ":" + sub.getPort()
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								+ " " + sub.getGroup());
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					}
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					conn.println(".");
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				} else {
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					conn.println("401 unknown sub command");
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				}
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			} else if (commands.length == 3 && commands[1].equalsIgnoreCase("DELETE")) {
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				StorageManager.current().delete(commands[2]);
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				conn.println("200 article " + commands[2] + " deleted");
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			} else if (commands.length == 4 && commands[1].equalsIgnoreCase("GROUPADD")) {
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				channelAdd(commands, conn);
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			} else if (commands.length == 3 && commands[1].equalsIgnoreCase("GROUPDEL")) {
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				Group group = StorageManager.current().getGroup(commands[2]);
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				if (group == null) {
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					conn.println("400 group not found");
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				} else {
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					group.setFlag(Group.DELETED);
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					group.update();
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					conn.println("200 group " + commands[2] + " marked as deleted");
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				}
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			} else if (commands.length == 5 && commands[1].equalsIgnoreCase("GROUPFLAG")) {
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				Group group = StorageManager.current().getGroup(commands[2]);
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				String flagName = commands[4];
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				if (commands[3].equalsIgnoreCase("SET")) {
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					if (flagName.equals("MAILINGLIST")) {
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						group.setFlag(Group.MAILINGLIST);
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					} else if (flagName.equals("DELETED")) {
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						group.setFlag(Group.DELETED);
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					} else if (flagName.equals("READONLY")) {
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						group.setFlag(Group.READONLY);
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					}
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				} else if (commands[3].equalsIgnoreCase("UNSET")) {
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					if (flagName.equals("MAILINGLIST")) {
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						group.unsetFlag(Group.MAILINGLIST);
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					} else if (flagName.equals("DELETED")) {
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						group.unsetFlag(Group.DELETED);
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					} else if (flagName.equals("READONLY")) {
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						group.unsetFlag(Group.READONLY);
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					}
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				} else {
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					conn.println("500 invalid command usage");
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				}
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				StorageManager.current().update(group);
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			} else if (commands.length == 4 && commands[1].equalsIgnoreCase("SET")) {
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				String key = commands[2];
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				String val = commands[3];
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				Config.inst().set(key, val);
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				conn.println("200 new config value set");
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			} else if (commands.length == 3 && commands[1].equalsIgnoreCase("GET")) {
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				String key = commands[2];
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				String val = Config.inst().get(key, null);
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				if (val != null) {
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					conn.println("100 config value for " + key + " follows");
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					conn.println(val);
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					conn.println(".");
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				} else {
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					conn.println("400 config value not set");
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				}
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			} else if (commands.length >= 3 && commands[1].equalsIgnoreCase("LOG")) {
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				Group group = null;
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				if (commands.length > 3) {
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					group = StorageManager.current().getGroup(commands[3]);
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				}
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				if (commands[2].equalsIgnoreCase("CONNECTED_CLIENTS")) {
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					conn.println("100 number of connections follow");
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					conn.println(Integer.toString(Stats.getInstance().connectedClients()));
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("POSTED_NEWS")) {
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					conn.println("100 hourly numbers of posted news yesterday");
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					for (int n = 0; n < 24; n++) {
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						conn.println(n + " " + Stats.getInstance().getYesterdaysEvents(Stats.POSTED_NEWS, n, group));
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					}
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("GATEWAYED_NEWS")) {
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					conn.println("100 hourly numbers of gatewayed news yesterday");
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					for (int n = 0; n < 24; n++) {
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						conn.println(n + " " + Stats.getInstance().getYesterdaysEvents(Stats.GATEWAYED_NEWS, n, group));
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					}
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("TRANSMITTED_NEWS")) {
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					conn.println("100 hourly numbers of news transmitted to peers yesterday");
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					for (int n = 0; n < 24; n++) {
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						conn.println(n + " " + Stats.getInstance().getYesterdaysEvents(Stats.FEEDED_NEWS, n, group));
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					}
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("HOSTED_NEWS")) {
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					conn.println("100 number of overall hosted news");
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					conn.println(Integer.toString(Stats.getInstance().getNumberOfNews()));
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("HOSTED_GROUPS")) {
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					conn.println("100 number of hosted groups");
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					conn.println(Integer.toString(Stats.getInstance().getNumberOfGroups()));
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("POSTED_NEWS_PER_HOUR")) {
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					conn.println("100 posted news per hour");
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					conn.println(Double.toString(Stats.getInstance().postedPerHour(-1)));
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("FEEDED_NEWS_PER_HOUR")) {
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					conn.println("100 feeded news per hour");
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					conn.println(Double.toString(Stats.getInstance().feededPerHour(-1)));
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					conn.println(".");
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				} else if (commands[2].equalsIgnoreCase("GATEWAYED_NEWS_PER_HOUR")) {
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					conn.println("100 gatewayed news per hour");
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					conn.println(Double.toString(Stats.getInstance().gatewayedPerHour(-1)));
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					conn.println(".");
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				} else {
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					conn.println("401 unknown sub command");
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				}
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			} else if (commands.length >= 3 && commands[1].equalsIgnoreCase("PLUGIN")) {
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				conn.println("400 invalid command usage");
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			} else {
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				conn.println("400 invalid command usage");
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			}
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		} else {
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			conn.println("501 not allowed");
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		}
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	}
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}