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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012-2013 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
 * http://glassfish.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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 *
 * Modifications:
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 */
package org.glassfish.tyrus.spi;

import javax.websocket.server.HandshakeRequest;

/**
 * Abstraction for a HTTP upgrade request. A transport creates an implementation
 * for this and uses {@link WebSocketEngine#upgrade} method to upgrade the
 * request.
 *
 * @author Danny Coward (danny.coward at oracle.com)
 * @author Pavel Bucek (pavel.bucek at oracle.com)
 */
public abstract class UpgradeRequest implements HandshakeRequest {

    public static final String WEBSOCKET = "websocket";
    public static final String RESPONSE_CODE_MESSAGE = "Switching Protocols";
    public static final String UPGRADE = "Upgrade";
    public static final String CONNECTION = "Connection";
    public static final String HOST = "Host";
    public static final String SERVER_KEY_HASH = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
    public static final String SEC_WS_ORIGIN_HEADER = "Sec-WebSocket-Origin";
    public static final String ORIGIN_HEADER = "Origin";

    /**
     * Returns the value of the specified request header name. If there are
     * multiple headers with the same name, this method returns the first
     * header in the request. The header name is case insensitive.
     *
     * @param name a header name.
     * @return value of the specified header name,
     *         null if the request doesn't have a header of that name.
     */
    public abstract String getHeader(String name);

    /**
     * Get the undecoded request uri (up to the query string) of underlying
     * HTTP handshake request.
     *
     * @return request uri.
     */
    public abstract String getRequestUri();

    /**
     * Indicates whether this request was made using a secure channel
     * (such as HTTPS).
     *
     * @return true if the request was made using secure channel,
     *         false otherwise.
     */
    public abstract boolean isSecure();
}