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/*
* Copyright © 2016-2017 European Support Limited
*
* 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.
*/
package org.openecomp.sdc.itempermissions.servlet;
import org.openecomp.sdc.itempermissions.PermissionsServices;
import org.openecomp.sdc.itempermissions.PermissionsServicesFactory;
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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* Created by ayalaben on 6/27/2017.
*/
public class PermissionsFilter implements Filter {
private final PermissionsServices permissionsServices;
private static final String IRRELEVANT_REQUEST = "Irrelevant_Request";
private static final String EDIT_ITEM = "Edit_Item";
public PermissionsFilter() {
this.permissionsServices = PermissionsServicesFactory.getInstance().createInterface();
}
@Override
public void init(FilterConfig filterConfig) {
// required by servlet API
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain filterChain) throws IOException, ServletException {
if ((servletRequest instanceof HttpServletRequest) &&
isIrrelevant((HttpServletRequest) servletRequest, servletResponse)) {
return;
}
filterChain.doFilter(servletRequest, servletResponse);
}
private boolean isIrrelevant(HttpServletRequest servletRequest, ServletResponse servletResponse) throws IOException {
String method = servletRequest.getMethod();
if (method.equals("POST") || method.equals("PUT")) {
String userId = servletRequest.getHeader("USER_ID");
String itemId = parseItemIdFromPath(servletRequest.getPathInfo());
if (!itemId.equals(IRRELEVANT_REQUEST) && !permissionsServices.isAllowed(itemId,userId,EDIT_ITEM)) {
((HttpServletResponse) servletResponse).setStatus(HttpServletResponse.SC_FORBIDDEN);
servletResponse.getWriter().print("Permissions Error. The user does not have " +
"permission to perform" +
" this action.");
return true;
}
}
return false;
}
private String parseItemIdFromPath(String pathInfo) {
String[] tokens = pathInfo.split("/");
if (tokens.length < 4) {
return IRRELEVANT_REQUEST;
} else {
return tokens[3];
}
}
@Override
public void destroy() {
// required by serlvet API
}
}
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