hawkeye camera support(not tested)
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meelstorm
309
framework/Inspectron.HawkEye/RTSP/Messages/RTSPMessage.cs
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309
framework/Inspectron.HawkEye/RTSP/Messages/RTSPMessage.cs
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.Contracts;
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using System.Globalization;
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using System.IO;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace Inspectron.HawkEye.RTSP.Messages
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{
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public class RtspMessage : RtspChunk
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{
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private static NLog.Logger _logger = NLog.LogManager.GetCurrentClassLogger();
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/// <summary>
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/// The regex to validate the Rtsp message.
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/// </summary>
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private static readonly Regex _rtspVersionTest = new Regex(@"^RTSP/\d\.\d", RegexOptions.Compiled);
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/// <summary>
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/// Create the good type of Rtsp Message from the header.
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/// </summary>
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/// <param name="aRequestLine">A request line.</param>
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/// <returns>An Rtsp message</returns>
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public static RtspMessage GetRtspMessage(string aRequestLine)
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{
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// We can't determine the message
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if (string.IsNullOrEmpty(aRequestLine))
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return new RtspMessage();
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string[] requestParts = aRequestLine.Split(new char[] { ' ' }, 3);
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RtspMessage returnValue;
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if (requestParts.Length == 3)
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{
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// A request is : Method SP Request-URI SP RTSP-Version
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// A response is : RTSP-Version SP Status-Code SP Reason-Phrase
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// RTSP-Version = "RTSP" "/" 1*DIGIT "." 1*DIGIT
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if (_rtspVersionTest.IsMatch(requestParts[2]))
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returnValue = RtspRequest.GetRtspRequest(requestParts);
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else if (_rtspVersionTest.IsMatch(requestParts[0]))
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returnValue = new RtspResponse();
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else
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{
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_logger.Warn(CultureInfo.InvariantCulture, "Got a strange message {0}", aRequestLine);
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returnValue = new RtspMessage();
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}
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}
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else
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{
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_logger.Warn(CultureInfo.InvariantCulture, "Got a strange message {0}", aRequestLine);
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returnValue = new RtspMessage();
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}
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returnValue.Command = aRequestLine;
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return returnValue;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="RtspMessage"/> class.
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/// </summary>
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public RtspMessage()
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{
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Data = new byte[0];
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Creation = DateTime.Now;
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}
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private Dictionary<string, string> _headers = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
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internal protected string[] commandArray;
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/// <summary>
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/// Gets or sets the creation time.
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/// </summary>
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/// <value>The creation time.</value>
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public DateTime Creation { get; private set; }
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/// <summary>
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/// Gets or sets the command of the message (first line).
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/// </summary>
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/// <value>The command.</value>
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public string Command
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{
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get
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{
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if (commandArray == null)
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return string.Empty;
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return string.Join(" ", commandArray);
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}
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set
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{
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if (value == null)
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commandArray = new string[] { String.Empty };
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else
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commandArray = value.Split(new char[] {' '}, 3);
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}
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}
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/// <summary>
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/// Gets the Method of the message (eg OPTIONS, DESCRIBE, SETUP, PLAY).
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/// </summary>
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/// <value>The Method</value>
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public string Method
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{
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get
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{
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if (commandArray == null)
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return string.Empty;
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return commandArray[0];
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}
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}
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/// <summary>
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/// Gets the headers of the message.
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/// </summary>
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/// <value>The headers.</value>
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public Dictionary<string, string> Headers
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{
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get
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{
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return _headers;
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}
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}
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/// <summary>
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/// Adds one header from a string.
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/// </summary>
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/// <param name="line">The string containing header of format Header: Value.</param>
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/// <exception cref="ArgumentNullException"><paramref name="line"/> is null</exception>
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public void AddHeader(string line)
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{
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if (line == (string)null)
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throw new ArgumentNullException("line");
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//spliter
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string[] elements = line.Split(new char[] { ':' }, 2);
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if (elements.Length == 2)
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{
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_headers[elements[0].Trim()] = elements[1].TrimStart();
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}
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else
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{
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_logger.Warn(CultureInfo.InvariantCulture, "Invalid Header received : -{0}-", line);
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}
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}
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/// <summary>
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/// Gets or sets the Ccommande Seqquence number.
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/// <remarks>If the header is not define or not a valid number it return 0</remarks>
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/// </summary>
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/// <value>The sequence number.</value>
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public int CSeq
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{
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get
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{
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string returnStringValue;
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int returnValue;
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if (!(_headers.TryGetValue("CSeq", out returnStringValue) &&
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int.TryParse(returnStringValue, out returnValue)))
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returnValue = 0;
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return returnValue;
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}
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set
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{
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_headers["CSeq"] = value.ToString(CultureInfo.InvariantCulture);
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}
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}
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/// <summary>
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/// Gets the session ID.
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/// </summary>
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/// <value>The session ID.</value>
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public virtual string Session
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{
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get
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{
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if (!_headers.ContainsKey("Session"))
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return null;
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return _headers["Session"];
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}
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set
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{
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_headers["Session"] = value;
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}
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}
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/// <summary>
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/// Initialises the length of the data byte array from content lenth header.
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/// </summary>
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public void InitialiseDataFromContentLength()
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{
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int dataLength;
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if (!(_headers.ContainsKey("Content-Length")
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&& int.TryParse(_headers["Content-Length"], out dataLength)))
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{
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dataLength = 0;
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}
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this.Data = new byte[dataLength];
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}
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/// <summary>
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/// Adjusts the content length header.
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/// </summary>
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public void AdjustContentLength()
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{
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if (Data.Length > 0)
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{
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_headers["Content-Length"] = Data.Length.ToString(CultureInfo.InvariantCulture);
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}
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else
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{
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_headers.Remove("Content-Length");
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}
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}
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/// <summary>
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/// Sends to the message to a stream.
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/// </summary>
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/// <param name="stream">The stream.</param>
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/// <exception cref="ArgumentNullException"><paramref name="stream"/> is empty</exception>
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/// <exception cref="ArgumentException"><paramref name="stream"/> can't be written.</exception>
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public void SendTo(Stream stream)
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{
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// <pex>
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if (stream == null)
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throw new ArgumentNullException("stream");
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if (!stream.CanWrite)
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throw
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new ArgumentException("Stream CanWrite == false, can't send message to it", "stream");
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// </pex>
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Contract.EndContractBlock();
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Encoding encoder = ASCIIEncoding.UTF8;
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StringBuilder outputString = new StringBuilder();
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AdjustContentLength();
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// output header
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outputString.Append(Command);
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outputString.Append("\r\n");
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foreach (KeyValuePair<string, string> item in _headers)
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{
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outputString.AppendFormat("{0}: {1}\r\n", item.Key, item.Value);
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}
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outputString.Append("\r\n");
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byte[] buffer = encoder.GetBytes(outputString.ToString());
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lock(stream) {
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stream.Write(buffer, 0, buffer.Length);
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// Output data
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if (Data.Length > 0)
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stream.Write(Data, 0, Data.Length);
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}
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stream.Flush();
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}
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/// <summary>
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/// Logs the message.
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/// </summary>
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/// <param name="aLevel">A log level.</param>
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public override void LogMessage(NLog.LogLevel aLevel)
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{
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// Default value to debug
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if (aLevel == null)
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aLevel = NLog.LogLevel.Debug;
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// if the level is not logged directly return
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if (!_logger.IsEnabled(aLevel))
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return;
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_logger.Log(aLevel, "Commande : {0}", Command);
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foreach (KeyValuePair<string, string> item in _headers)
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{
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_logger.Log(aLevel, "Header : {0}: {1}", item.Key, item.Value);
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}
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if (Data.Length > 0)
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{
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_logger.Log(aLevel, "Data :-{0}-", ASCIIEncoding.ASCII.GetString(Data));
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}
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}
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/// <summary>
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/// Crée un nouvel objet qui est une copie de l'instance en cours.
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/// </summary>
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/// <returns>
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/// Nouvel objet qui est une copie de cette instance.
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/// </returns>
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public override object Clone()
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{
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RtspMessage returnValue = GetRtspMessage(this.Command);
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foreach (var item in this.Headers)
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{
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if (item.Value == null)
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returnValue.Headers.Add(item.Key.Clone() as string, null);
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else
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returnValue.Headers.Add(item.Key.Clone() as string, item.Value.Clone() as string);
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}
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returnValue.Data = this.Data.Clone() as byte[];
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returnValue.SourcePort = this.SourcePort;
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return returnValue;
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}
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}
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}
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