package org.jolokia.restrictor.policy;
/*
* Copyright 2009-2011 Roland Huss
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.util.HashSet;
import java.util.Set;
import org.jolokia.util.HttpMethod;
import org.w3c.dom.*;
/**
* Checker, which extracts <code>http</code> elements from the policy document which in turn
* declares the allowed HTTP methods ("get" or "post")
*
* Example for allowing only post calls:
*
* <pre>
* <http>
* <method>post</method>
* </http>
* </pre>
* @author roland
* @since 02.09.11
*/
public class HttpMethodChecker extends AbstractChecker<HttpMethod> {
private Set<String> httpMethodsSet;
/**
* Create a checker which checks for certain HTTP methods
*
* @param pPolicy policy document
*/
public HttpMethodChecker(Document pPolicy) {
NodeList nodes = pPolicy.getElementsByTagName("http");
if (nodes.getLength() > 0) {
// Leave typeSet null if no commands has been given...
httpMethodsSet = new HashSet<String>();
}
for (int i = 0;i<nodes.getLength();i++) {
Node node = nodes.item(i);
NodeList childs = node.getChildNodes();
for (int j = 0;j<childs.getLength();j++) {
Node commandNode = childs.item(j);
if (commandNode.getNodeType() != Node.ELEMENT_NODE) {
continue;
}
assertNodeName(commandNode,"method");
String methodName = commandNode.getTextContent().trim().toLowerCase();
if (!methodName.equals("post") && ! methodName.equals("get")) {
throw new SecurityException("HTTP method must be either GET or POST, but not " + methodName.toUpperCase());
}
httpMethodsSet.add(methodName);
}
}
}
@Override
public boolean check(HttpMethod pMethod) {
return httpMethodsSet == null || httpMethodsSet.contains(pMethod.getMethod());
}
}