execwindows.java

用jxse开发的一个p2p通讯软件 有聊天 文件共享 视频3大功能

/*
*  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
*  reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
*
*  1. Redistributions of source code must retain the above copyright
*  notice, this list of conditions and the following disclaimer.
*
*  2. Redistributions in binary form must reproduce the above copyright
*  notice, this list of conditions and the following disclaimer in
*  the documentation and/or other materials provided with the
*  distribution.
*
*  3. The end-user documentation included with the redistribution,
*  if any, must include the following acknowledgment:
*  "This product includes software developed by the
*  Sun Microsystems, Inc. for Project JXTA."
*  Alternately, this acknowledgment may appear in the software itself,
*  if and wherever such third-party acknowledgments normally appear.
*
*  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
*  must not be used to endorse or promote products derived from this
*  software without prior written permission. For written
*  permission, please contact Project JXTA at http://www.jxta.org.
*
*  5. Products derived from this software may not be called "JXTA",
*  nor may "JXTA" appear in their name, without prior written
*  permission of Sun.
*
*  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*  SUCH DAMAGE.
*  ====================================================================
*
*  This software consists of voluntary contributions made by many
*  individuals on behalf of Project JXTA.  For more
*  information on Project JXTA, please see
*  <http://www.jxta.org/>.
*
*  This license is based on the BSD license adopted by the Apache Foundation.
*
*  $Id: ExecWindows.java,v 1.3 2007/01/26 21:54:32 bondolo Exp $
*/
package net.jxta.myjxta.util.exec;

import java.net.URL;

import java.util.logging.Logger;

/**
 * Base class for execs on all Windows platforms.
 *
 * @version $Id: ExecWindows.java,v 1.3 2007/01/26 21:54:32 bondolo Exp $
 *
 * @author james todd [gonzo at jxta dot org]
 * @author mike mcangus [mcangus at jxta dot org]
 * @modified frank toennies [nano at jxta dot org]
 */

public class ExecWindows
    extends BaseExec {

    private static final String COMMAND_PREFIX = "command.com /c start ";
    private static final String DOCUMENT_PREFIX = "rundll32 url.dll,FileProtocolHandler ";
    static final Logger LOG = Logger.getLogger(ExecWindows.class.getName());

    private String commandPrefix = COMMAND_PREFIX;

    /**
     * Creates a new ExecWindows instance.
     */
    public ExecWindows() {
        this(null);
    }

    /**
     * Creates a new ExecWindows instance.
     * 
     * @param commandPrefix The string that is added to the front of each received command.
     */
    public ExecWindows(String commandPrefix) {
        super();
        this.commandPrefix = (commandPrefix != null ?
                              commandPrefix : COMMAND_PREFIX);
    }

    /**
     * Returns the OS-specific process that will execute the specified command.
     * 
     * @param command The command string to be executed.
     * @return the OS-specific process that will execute the specified command.
     */
    public Process exec(String command) {
        return super.exec(getCommandPrefix() + command);
    }

    /**
     * Returns the OS-specific result code for the specified command.
     * 
     * @param command The command string to be executed.
     * @return the OS-specific result code for the specified command.
     */
    public int execValue(String command) {
        return super.execValue(getCommandPrefix() + command);
    }

    /**
     * Returns the OS-specific oricess required to access the specified URL.
     * 
     * @param doc The URL to be accessed..
     * @return the OS-specific process required to access the specified URL.
     */
    public Process execDocument(URL doc) {
        String toString=doc.toString();

        boolean emptyAuthority = doc.getAuthority()==null || doc.getAuthority().trim().length()==0;

        //on my system doc.toString returns file:/h:/jxta/.jxta/tmp/sharexyz.jpg --> thats illegal and the os does not accept this
        if (emptyAuthority  && doc.getProtocol().equals("file") && !toString.startsWith("file://") && doc.getFile().startsWith("/")){
            //illegal file url (no file:///h:/test...)
            LOG.log(java.util.logging.Level.WARNING,
                    "warning -- illegal file url " + toString +
                    " trying to create a legal one");
            toString="file://"+doc.getFile();
            LOG.log(java.util.logging.Level.INFO,
                    "new patched URL is " + toString);
        }

        return exec(DOCUMENT_PREFIX + toString);
    }
    
    /**
     * Returns the command prefix for this WindowsExec.
     * 
     * @return the command prefix for this WindowsExec.
     */
    protected String getCommandPrefix() {
        return this.commandPrefix;
    }
}