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/*
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2022 Nordix Foundation. All rights reserved.
* ================================================================================
* 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.openecomp.sdc.common.filters;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.StringUtils;
public abstract class ContentSecurityPolicyHeaderFilterAbstract implements Filter {
@Override
public void init(final FilterConfig filterConfig) throws ServletException {
// nothing to override
}
@Override
public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain) throws IOException, ServletException {
final HttpServletResponse httpServletResponse = (HttpServletResponse) response;
final String permittedAncestors = getPermittedAncestors();
httpServletResponse.setHeader("Content-Security-Policy",
"frame-ancestors 'self' " + (StringUtils.isNotBlank(permittedAncestors) ? permittedAncestors : ""));
chain.doFilter(request, httpServletResponse);
}
@Override
public void destroy() {
// nothing to override
}
protected abstract String getPermittedAncestors();
}
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