Exemplo n.º 1
0
            /// <summary>
            /// Is called when asynchrounous line reading has completed.
            /// </summary>
            /// <param name="e">Callback data.</param>
            private void OnReadHeader_ReadLine_Completed(ReadLine_EventArgs e)
            {
                try{
                    m_TotalReadedCount += e.ReadedCount;

                    // We got error.
                    if(e.Exception != null){ 
                        try{
                            m_pBufferedStream.Flush();
                            m_pStoreStream.Flush();
                        }
                        catch{
                            // Just skip excpetions here, otherwise we may hide original exception, 
                            // if exceptions is thrown by flush.
                        }

                        // Maximum line size exceeded, but junk data wanted.
                        if(m_ExceededAction == SizeExceededAction.JunkAndThrowException && e.Exception is LineSizeExceededException){
                            m_IsLineSizeExceeded = true;

                            // Start reading next data buffer block.
                            m_pStreamHelper.BeginReadLineInternal(m_pLineBuffer,m_ExceededAction,null,new ReadLineCallback(this.OnReadHeader_ReadLine_Completed),false,false);
                        }
                        // Unknown exception or ThrowException, so we are done.
                        else{
                            ReadHeaderCompleted(e.Exception);
                        }
                    }
                    // We got terminator, so we are done now.
                    else if(e.Count == 0 || e.ReadedCount == 0){
                        m_pBufferedStream.Flush();
                        m_pStoreStream.Flush();
                        
                        // LineSizeExceeded.
                        if(m_IsLineSizeExceeded){
                            ReadHeaderCompleted(new LineSizeExceededException());
                        }
                        // DataSizeExceeded.
                        else if(m_TotalReadedCount > m_MaxSize){
                            ReadHeaderCompleted(new DataSizeExceededException());
                        }
                        // Completed successfuly.
                        else{
                            ReadHeaderCompleted(null);
                        }
                    }
                    // Just append line to store stream and get next line.
                    else{
                        // Maximum allowed data size exceeded.
                        if(m_TotalReadedCount > m_MaxSize){
                            if(m_ExceededAction == SizeExceededAction.ThrowException){
                                ReadHeaderCompleted(new DataSizeExceededException());
                                return;
                            }
                            // Junk data.
                            //else{
                            //}
                        }
                        else{
                            m_pBufferedStream.Write(e.LineBuffer,0,e.Count);
                            m_pBufferedStream.Write(m_pStreamHelper.m_LineBreak,0,m_pStreamHelper.m_LineBreak.Length);
                        }

                        // Start reading new line.
                        m_pStreamHelper.BeginReadLineInternal(m_pLineBuffer,m_ExceededAction,null,new ReadLineCallback(this.OnReadHeader_ReadLine_Completed),false,false);
                    }
                }
                catch(Exception x){
                    ReadHeaderCompleted(x);
                }
            }
Exemplo n.º 2
0
        /// <summary>
        /// Default constructor.
        /// </summary>
        /// <param name="stream">Source stream.</param>
        /// <param name="maxLineSize">Specifies maximum line size in bytes.</param>
        /// <param name="bufferRead">Specifies if source stream reads are buffered..</param>
        public StreamHelper(Stream stream,int maxLineSize,bool bufferRead)
        {
            if(stream == null){
                throw new ArgumentNullException("stream");
            }
            if(maxLineSize < 1 || maxLineSize > 32000){
                throw new ArgumentException("Parameter maxLineSize value must be >= 1 and <= 32000 !");
            }

            m_IsReadBuffered = bufferRead;
            if(m_IsReadBuffered){
                m_pReadBuffer = new byte[32000];
            }

            m_pStream = stream;
            m_pLineBuffer = new byte[maxLineSize];
            m_MaxLineSize = maxLineSize;

            m_pRLine_EventArgs = new ReadLine_EventArgs();
            m_pRLine_ByteBuffer = new byte[1];
        }
Exemplo n.º 3
0
        /// <summary>
        /// Is called when BeginWritePeriodTerminated stream.BeginReadLine has completed.
        /// </summary>
        /// <param name="e">Callback data.</param>
        private void InternalBeginWritePeriodTerminatedReadLineCompleted(ReadLine_EventArgs e)
        {
            try{
                // Error happened during read.
                if(e.Exception != null){
                    InternalBeginWritePeriodTerminatedCompleted(e.Exception);
                }
                // We reached end of stream, no more data.
                else if(e.ReadedCount == 0){
                    InternalBeginWritePeriodTerminatedCompleted(null);
                }
                else{
                    m_BeginWritePeriodTerminated_Readed += e.ReadedCount;

                    // Maximum allowed data size exceeded.
                    if(m_BeginWritePeriodTerminated_Readed > m_BeginWritePeriodTerminated_MaxSize){
                        throw new DataSizeExceededException();
                    }

                    // If line starts with period, addtional period is added.
                    if(e.LineBuffer[0] == '.'){
                        m_pBeginWritePeriodTerminated_BufferedStream.WriteByte((int)'.');
                        m_BeginWritePeriodTerminated_Written++;
                    }

                    // Write readed line to buffered stream.
                    m_pBeginWritePeriodTerminated_BufferedStream.Write(e.LineBuffer,0,e.Count);                    
                    m_pBeginWritePeriodTerminated_BufferedStream.Write(m_LineBreak,0,m_LineBreak.Length);
                    m_BeginWritePeriodTerminated_Written += e.Count + m_LineBreak.Length;
                }
            }
            catch(Exception x){
                InternalBeginWritePeriodTerminatedCompleted(x);
            }
        }