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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
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 *
 * Modifications:
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package org.glassfish.osgihttp;

import org.apache.catalina.HttpRequest;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.valves.ValveBase;
import org.glassfish.security.common.PrincipalImpl;
import org.osgi.service.http.HttpContext;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.security.Principal;

/**
 * This valve is used to implement security in OSGi/HTTP service.
 *
 * @author [email protected]
 */
public class OSGiSecurityValve extends ValveBase {
    private HttpContext httpContext;

    public OSGiSecurityValve(HttpContext httpContext) {
        this.httpContext = httpContext;
    }

    public int invoke(Request request, Response response) throws IOException, ServletException {
        if (httpContext.handleSecurity(HttpServletRequest.class.cast(request),
                HttpServletResponse.class.cast(response))) {

            // Issue #13283: If user has set username and auth type, we need to map it to appropriate catalina apis
            // so that HttpServletRequest.getRemoteUser() and getAuthenticationType() will return appropriate values.
            mapUser((HttpRequest) request);
            mapAuthType((HttpRequest) request);

            return INVOKE_NEXT;
        } else {
//            HttpServletResponse.class.cast(response).sendError(
//                    HttpServletResponse.SC_FORBIDDEN);
            return END_PIPELINE;
        }

    }

    private void mapAuthType(HttpRequest httpRequest) {
        String authType = (String) httpRequest.getRequest().getAttribute(HttpContext.AUTHENTICATION_TYPE);
        if (authType != null) {
            httpRequest.setAuthType(authType);
        }
    }

    private void mapUser(HttpRequest httpRequest) {
        String userName = (String) httpRequest.getRequest().getAttribute(HttpContext.REMOTE_USER);
        if (userName != null) {
            Principal principal = new PrincipalImpl(userName);
            httpRequest.setUserPrincipal(principal);
        }
    }
}