RtspIncomingMessage.java

/*
 * Copyright  1990-2009 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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. 
 * 
 * This program 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 at /legal/license.txt). 
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

package com.sun.mmedia.rtsp;

import com.sun.mmedia.sdp.SdpSessionDescr;

public class RtspIncomingMessage {

    private byte[] bytes;

    private RtspMessageType type = null;
    private String statusCode = "";
    private String statusText = "";

    private SdpSessionDescr sdp = null;
    private String sessionId = null;
    private Integer sessionTimeout = null;
    private String contentBase = null;
    private String contentType = null;
    private Integer cseq = null;
    private RtspTransportHeader transportHdr = null;

    public RtspIncomingMessage(byte[] bytes) {
        this.bytes = bytes;

        int n = 0;
        while (n < bytes.length && ' ' != bytes[n]) n++;
        String strType = new String(bytes, 0, n);
        type = new RtspMessageType(strType);

        int offs = 0;

        while (offs < bytes.length) {

            int len = 0;
            while (offs + len + 1 < bytes.length &&
                   ('\r' != bytes[offs + len] || '\n' != bytes[offs + len + 1])) {
                len++;
            }

            String line = new String(bytes, offs, len);

            offs += len + 2;

            if (0 != line.length()) {
                parseLine(line);
            } else {
                if (offs < bytes.length && "application/sdp".equals(contentType)) {
                    sdp = new SdpSessionDescr(bytes, offs, bytes.length - offs);
                }
                break;
            }
        }
    }

    public RtspMessageType getType() {
        return type;
    }

    public SdpSessionDescr getSdp() {
        return sdp;
    }

    public String getSessionId() {
        return sessionId;
    }

    public Integer getSessionTimeout() {
        return sessionTimeout;
    }

    public String getContentBase() {
        return contentBase;
    }

    public String getStatusCode() {
        return statusCode;
    }

    public String getStatusText() {
        return statusText;
    }

    public Integer getCSeq() {
        return cseq;
    }

    public RtspTransportHeader getTransportHeader() {
        return transportHdr;
    }

    private void parseLine(String line) {
        int colon_pos = line.indexOf(':');
        if (-1 != colon_pos) {

            String hdr_type_str = line.substring(0, colon_pos).toUpperCase();
            String hdr_body = line.substring(colon_pos + 2);

            if (hdr_type_str.equals("CSEQ")) {
                try {
                    cseq = new Integer(Integer.parseInt(hdr_body));
                } catch (NumberFormatException e) {
                    cseq = null;
                }
            } else if (hdr_type_str.equals("TRANSPORT")) {
                transportHdr = new RtspTransportHeader(hdr_body);
            } else if (hdr_type_str.equals("SESSION")) {
                int semi_pos = hdr_body.indexOf(';');
                if (-1 == semi_pos) {
                    sessionId = hdr_body;
                } else {
                    sessionId = hdr_body.substring(0, semi_pos);
                    int start = hdr_body.indexOf("TIMEOUT");
                    if (-1 != start) start = hdr_body.indexOf("=") + 1;
                    if (start > 0) {
                        try {
                            sessionTimeout = new Integer(Integer.parseInt(hdr_body.substring(start)));
                        } catch (NumberFormatException e) {
                            sessionTimeout = null;
                        }
                    }
                }
            } else if (hdr_type_str.equals("CONTENT-BASE")) {
                contentBase = hdr_body;
            } else if (hdr_type_str.equals("CONTENT-TYPE")) {
                contentType = hdr_body;
            } else if (hdr_type_str.equals("RANGE")) {
            }
        } else if (line.startsWith("RTSP/1.0")) {
            statusCode = line.substring(9, 12);
            statusText = line.substring(13);
        }
    }
}