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/*
Copyright (c) 2003 eInnovation Inc. All rights reserved
This library is free software; you can redistribute it and/or modify it under the terms
of the GNU Lesser General Public License as published by the Free Software Foundation;
either version 2.1 of the License, or (at your option) any later version.
This library 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 Lesser General Public License for more details.
*/
/*--
Copyright (C) 2001-2002 Anthony Eden.
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 disclaimer that follows
these conditions in the documentation and/or other materials
provided with the distribution.
3. The name "JPublish" must not be used to endorse or promote products
derived from this software without prior written permission. For
written permission, please contact me@anthonyeden.com.
4. Products derived from this software may not be called "JPublish", nor
may "JPublish" appear in their name, without prior written permission
from Anthony Eden (me@anthonyeden.com).
In addition, I request (but do not require) that you include in the
end-user documentation provided with the redistribution and/or in the
software itself an acknowledgement equivalent to the following:
"This product includes software developed by
Anthony Eden (http://www.anthonyeden.com/)."
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 AUTHOR(S) BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
For more information on JPublish, please see <http://www.jpublish.org/>.
*/
/**
* Utility class for working with request paths.
*
* @author Anthony Eden
*/
public final class PathUtilities
{
private static final String WILDCARD = "*";
/**
* resolve a relative URL string against an absolute URL string.
*
* This method was adapted from the CalCom library at http://www.calcom.de
*
* <p>the absolute URL string is the start point for the
* relative path.</p>
*
* <p><b>Example:</b></p>
* <pre>
* relative path: ../images/test.jpg
* absolute path: file:/d:/eigene dateien/eigene bilder/
* result: file:/d:/eigene dateien/images/test.jpg
* </pre>
*
* @param relPath The relative URL string to resolve. Unlike the Calcom version, this may be
* an absolute path, if it starts with "/".
* @param absPath The absolute URL string to start at. Unlike the CalCom version, this may be a filename
* rather than just a path.
*
* @return the absolute URL string resulting from resolving relPath against absPath
*
* @author Ulrich Hilger
* @author CalCom
* @author <a href="http://www.calcom.de">http://www.calcom.de</a>
* @author <a href="mailto:info@calcom.de">info@calcom.de</a>
* @author Dennis Brown (eInnovation)
*/
public static String resolveRelativePath(String relPath, String absPath)
{
// if relative path is really absolute, then ignore absPath (eInnovation change)
if ( relPath.startsWith( "/" ) )
{
absPath = "";
}
String newAbsPath = absPath;
String newRelPath = relPath;
if( relPath.startsWith("$"))
{
return relPath;
}
else if (absPath.endsWith("/"))
{
newAbsPath = absPath.substring(0, absPath.length() - 1);
}
else
{
// absPath ends with a filename, remove it (eInnovation change)
int lastSlashIndex = absPath.lastIndexOf('/');
if ( lastSlashIndex >= 0 )
{
newAbsPath = absPath.substring( 0, lastSlashIndex );
}
else
{
newAbsPath = "";
}
}
int relPos = newRelPath.indexOf("../");
while (relPos > -1)
{
newRelPath = newRelPath.substring(relPos + 3);
int lastSlashInAbsPath = newAbsPath.lastIndexOf( "/" );
if ( lastSlashInAbsPath >= 0 )
{
newAbsPath = newAbsPath.substring(0, newAbsPath.lastIndexOf("/"));
}
else
{
// eInnovation change: fix potential exception
newAbsPath = "";
}
relPos = newRelPath.indexOf("../");
}
String returnedPath;
if (newRelPath.startsWith("/"))
{
returnedPath = newAbsPath + newRelPath;
}
else
{
returnedPath = newAbsPath + "/" + newRelPath;
}
// remove any "." references to current directory (eInnovation change)
// For example:
// "./junk" becomes "junk"
// "/./junk" becomes "/junk"
// "junk/." becomes "junk"
while ( returnedPath.endsWith( "/." ) )
{
returnedPath = returnedPath.substring( 0, returnedPath.length() - 2 );
}
do
{
int dotSlashIndex = returnedPath.lastIndexOf( "./" );
if ( dotSlashIndex < 0 )
{
break;
}
else if ( dotSlashIndex == 0 || returnedPath.charAt( dotSlashIndex - 1 ) != '.' )
{
String firstSubstring;
if ( dotSlashIndex > 0 )
{
firstSubstring = returnedPath.substring( 0, dotSlashIndex );
}
else
{
firstSubstring = "";
}
String secondSubstring;
if ( dotSlashIndex + 2 < returnedPath.length() )
{
secondSubstring = returnedPath.substring( dotSlashIndex + 2, returnedPath.length() );
}
else
{
secondSubstring = "";
}
returnedPath = firstSubstring + secondSubstring;
}
} while ( true );
return returnedPath;
}
}
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