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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2023 Nordix Foundation.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdpx.main.rest;
import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Filter that verifies that the API services (i.e., decision services) are enabled
* before allowing the request through.
*/
public class XacmlPdpServiceFilter implements Filter {
/**
* Services the are always available, even when the API is disabled.
*/
public static final Set<String> PERMANENT_SERVICES = Set.of("healthcheck", "statistics", "metrics");
private static final AtomicBoolean apiDisabled = new AtomicBoolean(true);
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
if (apiDisabled.get() && !PERMANENT_SERVICES.contains(getUriSuffix(request))) {
response.setStatus(HttpServletResponse.SC_CONFLICT);
} else {
filterChain.doFilter(servletRequest, servletResponse);
}
}
private String getUriSuffix(HttpServletRequest request) {
String uri = request.getRequestURI();
int index = uri.lastIndexOf('/');
return (index < 0 ? uri : uri.substring(index + 1));
}
/**
* Determines if API services are enabled.
*
* @return {@code true}, if API services are enabled
*/
public static boolean isApiEnabled() {
return !apiDisabled.get();
}
/**
* Enables the API services.
*/
public static void enableApi() {
apiDisabled.set(false);
}
/**
* Disables the API services.
*/
public static void disableApi() {
apiDisabled.set(true);
}
}
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