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 * 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.
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 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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package org.glassfish.grizzly.websockets.draft06;

import java.net.URI;
import java.util.List;

import org.glassfish.grizzly.http.HttpContent;
import org.glassfish.grizzly.http.HttpHeader;
import org.glassfish.grizzly.http.HttpRequestPacket;
import org.glassfish.grizzly.http.HttpResponsePacket;
import org.glassfish.grizzly.http.util.MimeHeaders;
import org.glassfish.grizzly.websockets.HandShake;
import org.glassfish.grizzly.websockets.HandshakeException;
import org.glassfish.grizzly.websockets.WebSocketEngine;

public class HandShake06 extends HandShake {
    private final SecKey secKey;
    private List enabledExtensions;
    private List enabledProtocols;

    public HandShake06(URI url) {
        super(url);
        secKey = new SecKey();
    }

    public HandShake06(HttpRequestPacket request) {
        super(request);
        final MimeHeaders mimeHeaders = request.getHeaders();
        setExtensions(split(mimeHeaders.getHeader(WebSocketEngine.SEC_WS_EXTENSIONS_HEADER)));
        secKey = SecKey.generateServerKey(new SecKey(mimeHeaders.getHeader(WebSocketEngine.SEC_WS_KEY_HEADER)));
    }

    public void setHeaders(HttpResponsePacket response) {
        response.setReasonPhrase(WebSocketEngine.RESPONSE_CODE_MESSAGE);
        response.setHeader(WebSocketEngine.SEC_WS_ACCEPT, secKey.getSecKey());
        if (getEnabledExtensions() != null) {
            response.setHeader(WebSocketEngine.SEC_WS_EXTENSIONS_HEADER, join(getSubProtocol()));
        }
    }

    @Override
    public HttpContent composeHeaders() {
        final HttpContent httpContent = super.composeHeaders();
        final HttpHeader header = httpContent.getHttpHeader();
        header.addHeader(WebSocketEngine.SEC_WS_KEY_HEADER, secKey.toString());
        header.addHeader(WebSocketEngine.SEC_WS_ORIGIN_HEADER, getOrigin());
        header.addHeader(WebSocketEngine.SEC_WS_VERSION, getVersion() + "");
        if (!getExtensions().isEmpty()) {
            header.addHeader(WebSocketEngine.SEC_WS_EXTENSIONS_HEADER, join(getExtensions()));
        }
        return httpContent;
    }

    protected int getVersion() {
        return 6;
    }

    @Override
    public void validateServerResponse(final HttpResponsePacket headers) throws HandshakeException {
        super.validateServerResponse(headers);
        secKey.validateServerKey(headers.getHeader(WebSocketEngine.SEC_WS_ACCEPT));
    }

    public List getEnabledExtensions() {
        return enabledExtensions;
    }

    public List getEnabledProtocols() {
        return enabledProtocols;
    }
}