/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.hadoop.gateway.preauth.filter;
import java.security.Principal;
import java.util.Set;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import org.apache.hadoop.gateway.security.GroupPrincipal;
public class HeaderPreAuthFederationFilter extends AbstractPreAuthFederationFilter {
static final String CUSTOM_HEADER_PARAM = "preauth.custom.header";
static final String CUSTOM_GROUP_HEADER_PARAM = "preauth.custom.group.header";
String headerName = "SM_USER";
String groupHeaderName = null;
@Override
public void init(FilterConfig filterConfig) throws ServletException {
super.init(filterConfig);
String customHeader = filterConfig.getInitParameter(CUSTOM_HEADER_PARAM);
if (customHeader != null) {
headerName = customHeader;
}
String customGroupHeader = filterConfig.getInitParameter(CUSTOM_GROUP_HEADER_PARAM);
if (customGroupHeader != null) {
groupHeaderName = customGroupHeader;
}
}
/**
* @param httpRequest
*/
@Override
protected String getPrimaryPrincipal(HttpServletRequest httpRequest) {
return httpRequest.getHeader(headerName);
}
/**
* @param principals
*/
@Override
protected void addGroupPrincipals(HttpServletRequest request, Set<Principal> principals) {
if (groupHeaderName != null) {
String headers = request.getHeader(groupHeaderName);
if (headers != null) {
String[] groups = headers.split(",");
for (int i = 0; i < groups.length; i++) {
principals.add(new GroupPrincipal(groups[i]));
}
}
}
}
}