/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.security;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;
import javax.servlet.FilterChain;
import javax.servlet.http.HttpServletResponse;
import com.caucho.server.dispatch.ErrorFilterChain;
import com.caucho.server.dispatch.FilterChainBuilder;
import com.caucho.server.dispatch.Invocation;
import com.caucho.server.webapp.WebApp;
/**
* Manages security constraint.
*/
public class ConstraintManager extends FilterChainBuilder {
private ArrayList<SecurityConstraint> _constraints
= new ArrayList<SecurityConstraint>();
public void addConstraint(SecurityConstraint constraint)
{
_constraints.add(constraint);
}
public FilterChainBuilder getFilterBuilder()
{
return this;
/*
if (_constraints.size() > 0)
return this;
else
return null;
*/
}
/**
* Builds a filter chain dynamically based on the invocation.
*
* @param next the next filter in the chain.
* @param invocation the request's invocation.
*/
@Override
public FilterChain build(FilterChain next, Invocation invocation)
{
String uri = invocation.getContextURI();
WebApp webApp = invocation.getWebApp();
if (webApp == null)
return next;
String lower = uri.toLowerCase(Locale.ENGLISH);
if (lower.startsWith("/web-inf")
|| lower.startsWith("/meta-inf")) {
return new ErrorFilterChain(HttpServletResponse.SC_NOT_FOUND);
}
ArrayList<AbstractConstraint> constraints;
constraints = new ArrayList<AbstractConstraint>();
HashMap<String,AbstractConstraint[]> methodMap;
methodMap = new HashMap<String,AbstractConstraint[]>();
loop:
for (int i = 0; i < _constraints.size(); i++) {
SecurityConstraint constraint = _constraints.get(i);
if (constraint.isMatch(uri)) {
AbstractConstraint absConstraint = constraint.getConstraint();
if (absConstraint != null) {
ArrayList<String> methods = constraint.getMethods(uri);
for (int j = 0; methods != null && j < methods.size(); j++) {
String method = methods.get(j);
AbstractConstraint []methodList = methodMap.get(method);
if (methodList == null) {
// server/1ak4
// server/12ba - the first constraint matches, following are
// ignored
methodList = absConstraint.toArray();
methodMap.put(method, methodList);
}
}
if (methods == null || methods.size() == 0) {
AbstractConstraint []constArray = absConstraint.toArray();
for (int k = 0; k < constArray.length; k++)
constraints.add(constArray[k]);
// server/12ba - the first constraint matches, following are
// ignored
if (! constraint.isFallthrough())
break loop;
}
}
else {
// server/1233
if (! constraint.isFallthrough())
break loop;
}
}
}
if (constraints.size() > 0 || methodMap.size() > 0) {
SecurityFilterChain filterChain = new SecurityFilterChain(next);
filterChain.setWebApp(invocation.getWebApp());
if (methodMap.size() > 0)
filterChain.setMethodMap(methodMap);
filterChain.setConstraints(constraints);
return filterChain;
}
return next;
}
public boolean hasConstraintForUrlPattern(String pattern)
{
for (SecurityConstraint constraint : _constraints) {
if (constraint.isMatch(pattern))
return true;
}
return false;
}
}