Michael Bayne
919112cf88
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5134 542714f4-19e9-0310-aa3c-eee0fc999fb1
101 lines
3.7 KiB
Java
101 lines
3.7 KiB
Java
//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.presents.server;
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import com.threerings.presents.data.ClientObject;
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import com.threerings.presents.dobj.AccessController;
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import com.threerings.presents.dobj.DEvent;
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import com.threerings.presents.dobj.DObject;
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import com.threerings.presents.dobj.InvocationRequestEvent;
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import com.threerings.presents.dobj.MessageEvent;
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import com.threerings.presents.dobj.NamedEvent;
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import com.threerings.presents.dobj.Subscriber;
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import static com.threerings.presents.Log.log;
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/**
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* Defines the various object access controllers used by the Presents server.
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*/
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public class PresentsObjectAccess
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{
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/**
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* Our default access controller. Disallows modification of any object but allows anyone to
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* subscribe.
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*/
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public static AccessController DEFAULT = new AccessController()
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{
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// documentation inherited from interface
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public boolean allowSubscribe (DObject object, Subscriber subscriber)
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{
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// allow anyone to subscribe
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return true;
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}
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// documentation inherited from interface
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public boolean allowDispatch (DObject object, DEvent event)
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{
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// if the event came from the server, it's cool
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if (event.getSourceOid() == -1) {
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return true;
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} else {
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// if it came from the client, it better be a non-modification event
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return (event instanceof MessageEvent || event instanceof InvocationRequestEvent);
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}
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}
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};
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/**
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* Provides access control for client objects.
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*/
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public static AccessController CLIENT = new AccessController()
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{
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// documentation inherited from interface
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public boolean allowSubscribe (DObject object, Subscriber sub)
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{
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boolean allowed = true;
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// if the subscriber is a client, ensure that they are this same user
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if (sub instanceof PresentsClient) {
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allowed = ((PresentsClient)sub).getClientObject() == object;
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if (!allowed) {
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log.warning("Refusing ClientObject subscription request " +
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"[obj=" + ((ClientObject)object).who() + ", sub=" + sub + "].");
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}
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}
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return allowed;
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}
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// documentation inherited from interface
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public boolean allowDispatch (DObject object, DEvent event)
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{
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// if the event came from the server, it's cool
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if (event.getSourceOid() == -1) {
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return true;
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}
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// the client is only allowed to modify the RECEIVERS field
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return ((event instanceof NamedEvent) &&
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((NamedEvent)event).getName().equals(ClientObject.RECEIVERS));
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}
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};
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}
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