SIPSorcery.Net.RTSPRequest.ParseRTSPRequest C# (CSharp) Method

        public static RTSPRequest ParseRTSPRequest(RTSPMessage rtspMessage, out RTSPRequestParserError requestParserError)
        {
            requestParserError = RTSPRequestParserError.None;
            string urlStr = null;

            try
            {
                RTSPRequest rtspRequest = new RTSPRequest();

                string statusLine = rtspMessage.FirstLine;

                int firstSpacePosn = statusLine.IndexOf(" ");

                string method = statusLine.Substring(0, firstSpacePosn).Trim();
                rtspRequest.Method = RTSPMethods.GetMethod(method);
                if (rtspRequest.Method == RTSPMethodsEnum.UNKNOWN)
                {
                    rtspRequest.UnknownMethod = method;
                    logger.Warn("Unknown RTSP method received " + rtspRequest.Method + ".");
                }

                statusLine = statusLine.Substring(firstSpacePosn).Trim();
                int secondSpacePosn = statusLine.IndexOf(" ");

                if (secondSpacePosn != -1)
                {
                    urlStr = statusLine.Substring(0, secondSpacePosn);

                    rtspRequest.URL = RTSPURL.ParseRTSPURL(urlStr);
                    rtspRequest.RTSPVersion = statusLine.Substring(secondSpacePosn, statusLine.Length - secondSpacePosn).Trim();
                    rtspRequest.Header = (rtspMessage.RTSPHeaders != null) ? RTSPHeader.ParseRTSPHeaders(rtspMessage.RTSPHeaders) : new RTSPHeader(0, null);
                    rtspRequest.Body = rtspMessage.Body;

                    return rtspRequest;
                }
                else
                {
                    throw new ApplicationException("URI was missing on RTSP request.");
                }
            }
            catch(Exception excp)
            {
                logger.Error("Exception parsing RTSP request. URI, " + urlStr + ".");
                throw new ApplicationException("There was an exception parsing an RTSP request. " + excp.Message);
            }
        }