/*

 * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.net.httpserver;

import com.sun.net.httpserver.*;

import java.io.*;

import java.nio.*;

import java.nio.channels.*;

import java.util.*;

import javax.security.auth.*;

import javax.security.auth.callback.*;

import javax.security.auth.login.*;

public class AuthFilter extends Filter {

    private Authenticator authenticator;

    public AuthFilter (Authenticator authenticator) {

        this.authenticator = authenticator;

    }

    public String description () {

        return "Authentication filter";

    }

    public void setAuthenticator (Authenticator a) {

        authenticator = a;

    }

    public void consumeInput (HttpExchange t) throws IOException {

        InputStream i = t.getRequestBody();

        byte[] b = new byte [4096];

        while (i.read (b) != -1);

        i.close ();

    }

    /**

     * The filter's implementation, which is invoked by the server

     */

    public void doFilter (HttpExchange t, Filter.Chain chain) throws IOException

    {

        if (authenticator != null) {

            Authenticator.Result r = authenticator.authenticate (t);

            if (r instanceof Authenticator.Success) {

                Authenticator.Success s = (Authenticator.Success)r;

                ExchangeImpl e = ExchangeImpl.get (t);

                e.setPrincipal (s.getPrincipal());

                chain.doFilter (t);

            } else if (r instanceof Authenticator.Retry) {

                Authenticator.Retry ry = (Authenticator.Retry)r;

                consumeInput (t);

                t.sendResponseHeaders (ry.getResponseCode(), -1);

            } else if (r instanceof Authenticator.Failure) {

                Authenticator.Failure f = (Authenticator.Failure)r;

                consumeInput (t);

                t.sendResponseHeaders (f.getResponseCode(), -1);

            }

        } else {

            chain.doFilter (t);

        }

    }

}