/
RegexPathSpec.java
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/
RegexPathSpec.java
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//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.http.pathmap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexPathSpec extends AbstractPathSpec
{
private final String _declaration;
private final PathSpecGroup _group;
private final int _pathDepth;
private final int _specLength;
private final Pattern _pattern;
public RegexPathSpec(String regex)
{
String declaration;
if (regex.startsWith("regex|"))
declaration = regex.substring("regex|".length());
else
declaration = regex;
int specLength = declaration.length();
// build up a simple signature we can use to identify the grouping
boolean inGrouping = false;
StringBuilder signature = new StringBuilder();
int pathDepth = 0;
for (int i = 0; i < declaration.length(); i++)
{
char c = declaration.charAt(i);
switch (c)
{
case '[':
inGrouping = true;
break;
case ']':
inGrouping = false;
signature.append('g'); // glob
break;
case '*':
signature.append('g'); // glob
break;
case '/':
if (!inGrouping)
pathDepth++;
break;
default:
if (!inGrouping && Character.isLetterOrDigit(c))
signature.append('l'); // literal (exact)
break;
}
}
Pattern pattern = Pattern.compile(declaration);
// Figure out the grouping based on the signature
String sig = signature.toString();
PathSpecGroup group;
if (Pattern.matches("^l*$", sig))
group = PathSpecGroup.EXACT;
else if (Pattern.matches("^l*g+", sig))
group = PathSpecGroup.PREFIX_GLOB;
else if (Pattern.matches("^g+l+$", sig))
group = PathSpecGroup.SUFFIX_GLOB;
else
group = PathSpecGroup.MIDDLE_GLOB;
_declaration = declaration;
_group = group;
_pathDepth = pathDepth;
_specLength = specLength;
_pattern = pattern;
}
protected Matcher getMatcher(String path)
{
return _pattern.matcher(path);
}
@Override
public int getSpecLength()
{
return _specLength;
}
@Override
public PathSpecGroup getGroup()
{
return _group;
}
@Override
public int getPathDepth()
{
return _pathDepth;
}
@Override
public String getPathInfo(String path)
{
// Path Info only valid for PREFIX_GLOB types
if (_group == PathSpecGroup.PREFIX_GLOB)
{
Matcher matcher = getMatcher(path);
if (matcher.matches())
{
if (matcher.groupCount() >= 1)
{
String pathInfo = matcher.group(1);
if ("".equals(pathInfo))
return "/";
else
return pathInfo;
}
}
}
return null;
}
@Override
public String getPathMatch(String path)
{
Matcher matcher = getMatcher(path);
if (matcher.matches())
{
if (_group == PathSpecGroup.PREFIX_GLOB && matcher.groupCount() >= 1)
{
int idx = matcher.start(1);
if (idx > 0)
{
if (path.charAt(idx - 1) == '/')
idx--;
return path.substring(0, idx);
}
}
return path;
}
return null;
}
@Override
public String getDeclaration()
{
return _declaration;
}
@Override
public String getPrefix()
{
return null;
}
@Override
public String getSuffix()
{
return null;
}
public Pattern getPattern()
{
return _pattern;
}
@Override
public boolean matches(final String path)
{
int idx = path.indexOf('?');
if (idx >= 0)
{
// match only non-query part
return getMatcher(path.substring(0, idx)).matches();
}
else
{
// match entire path
return getMatcher(path).matches();
}
}
}