334 lines
14 KiB
C#
334 lines
14 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Net;
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using System.Net.Sockets;
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using System.IO;
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using System.Threading;
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namespace MECF.Framework.RT.Core.IoProviders.Siemens.Net
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{
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/*******************************************************************************
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*
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* 网络通信类的基础类，提供所有相关的基础方法和功能
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*
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* Network communication base class of the class, provides the basis of all relevant methods and functions
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*
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*******************************************************************************/
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#region Network Helper
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/// <summary>
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/// 静态的方法支持类，提供一些网络的静态支持，支持从套接字从同步接收指定长度的字节数据，并支持报告进度。
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/// </summary>
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/// <remarks>
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/// 在接收指定数量的字节数据的时候，如果一直接收不到，就会发生假死的状态。接收的数据时保存在内存里的，不适合大数据块的接收。
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/// </remarks>
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/// <example>
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/// 一个接收的示例
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/// <code lang="cs" source="HslCommunication_Net45.Test\Documentation\Samples\Core\NetSupport.cs" region="ReadBytesFromSocketExample2" title="ReadBytesFromSocket示例" />
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/// </example>
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public static class NetSupport
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{
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/// <summary>
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/// Socket传输中的缓冲池大小
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/// </summary>
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internal const int SocketBufferSize = 4096;
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/// <summary>
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/// 检查是否超时的静态方法
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/// </summary>
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/// <param name="timeout">数据封送对象</param>
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/// <param name="millisecond">超时的时间</param>
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internal static void ThreadPoolCheckConnect( HslTimeOut timeout, int millisecond )
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{
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while (!timeout.IsSuccessful)
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{
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if ((DateTime.Now - timeout.StartTime).TotalMilliseconds > millisecond)
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{
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// 连接超时或是验证超时
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if (!timeout.IsSuccessful) timeout.WorkSocket?.Close( );
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break;
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}
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Thread.Sleep( 100 );
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}
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}
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/// <summary>
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/// 检查是否超时的方法信息
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/// </summary>
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/// <param name="obj">socket对象</param>
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internal static void ThreadPoolCheckTimeOut( object obj )
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{
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if (obj is HslTimeOut timeout)
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{
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while (!timeout.IsSuccessful)
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{
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if ((DateTime.Now - timeout.StartTime).TotalMilliseconds > timeout.DelayTime)
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{
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// 连接超时或是验证超时
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if (!timeout.IsSuccessful)
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{
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timeout.Operator?.Invoke( );
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timeout.WorkSocket?.Close( );
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}
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break;
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}
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}
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}
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}
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/// <summary>
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/// 读取socket数据的基础方法，只适合用来接收指令头，或是同步数据
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/// </summary>
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/// <param name="socket">通信对象</param>
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/// <param name="receive">接收的长度</param>
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/// <returns>接收到的字节数据</returns>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="SocketException"></exception>
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/// <exception cref="ObjectDisposedException"></exception>
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/// <exception cref="System.Security.SecurityException"></exception>
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/// <example>
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/// 接收数据的举例，简单的接收20个字节长度的数据。
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/// <code lang="cs" source="HslCommunication_Net45.Test\Documentation\Samples\Core\NetSupport.cs" region="ReadBytesFromSocketExample1" title="ReadBytesFromSocket示例" />
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/// 如何接收不定长度的数据呢？我们可以将一条数据拆分成2次接收，第一次是接收8个固定的字节，解析成长度，再接收真实的数据。
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/// <code lang="cs" source="HslCommunication_Net45.Test\Documentation\Samples\Core\NetSupport.cs" region="ReadBytesFromSocketExample3" title="ReadBytesFromSocket示例" />
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/// </example>
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public static byte[] ReadBytesFromSocket( Socket socket, int receive )
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{
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return ReadBytesFromSocket( socket, receive, null, false, false );
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}
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/// <summary>
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/// 读取socket数据的基础方法，只适合用来接收指令头，或是同步数据
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/// </summary>
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/// <param name="socket">通信对象</param>
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/// <param name="receive">接收的长度</param>
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/// <param name="report">用于报告接收进度的对象</param>
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/// <param name="reportByPercent">是否按照百分比报告进度</param>
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/// <param name="response">是否回发接收数据长度</param>
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/// <returns>接收到的字节数据</returns>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="SocketException"></exception>
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/// <exception cref="ObjectDisposedException"></exception>
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/// <exception cref="System.Security.SecurityException"></exception>
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/// <example>
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/// 接收数据的举例，输出报告，不根据百分比来产生报告，不回复接收进度。
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/// <code lang="cs" source="HslCommunication_Net45.Test\Documentation\Samples\Core\NetSupport.cs" region="ReadBytesFromSocketExample2" title="ReadBytesFromSocket示例" />
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/// </example>
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public static byte[] ReadBytesFromSocket( Socket socket, int receive, Action<long, long> report, bool reportByPercent, bool response )
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{
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byte[] bytes_receive = new byte[receive];
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int count_receive = 0;
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long percent = 0;
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while (count_receive < receive)
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{
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// 分割成2KB来接收数据
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int receive_length = (receive - count_receive) >= SocketBufferSize ? SocketBufferSize : (receive - count_receive);
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count_receive += socket.Receive( bytes_receive, count_receive, receive_length, SocketFlags.None );
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if (reportByPercent)
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{
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long percentCurrent = (long)count_receive * 100 / receive;
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if (percent != percentCurrent)
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{
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percent = percentCurrent;
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// 报告进度
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report?.Invoke( count_receive, receive );
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}
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}
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else
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{
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// 报告进度
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report?.Invoke( count_receive, receive );
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}
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// 回发进度
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if (response) socket.Send( BitConverter.GetBytes( (long)count_receive ) );
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}
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return bytes_receive;
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}
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/// <summary>
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/// 接收一行命令数据，需要自己指定这个结束符
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/// </summary>
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/// <param name="socket">网络套接字</param>
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/// <param name="endCode">结束符信息</param>
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/// <returns>带有结果对象的数据信息</returns>
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public static OperateResult<byte[]> ReceiveCommandLineFromSocket( Socket socket, byte endCode )
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{
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List<byte> bufferArray = new List<byte>( );
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try
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{
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// 接收到endCode为止
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while (true)
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{
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byte[] head = NetSupport.ReadBytesFromSocket( socket, 1 );
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bufferArray.AddRange( head );
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if (head[0] == endCode) break;
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}
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// 指令头已经接收完成
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return OperateResult.CreateSuccessResult( bufferArray.ToArray( ) );
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}
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catch (Exception ex)
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{
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socket?.Close( );
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return new OperateResult<byte[]>( ex.Message );
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}
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}
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/// <summary>
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/// 接收一行命令数据，需要自己指定这个结束符
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/// </summary>
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/// <param name="socket">网络套接字</param>
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/// <param name="endCode1">结束符1信息</param>
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/// <param name="endCode2">结束符2信息</param>
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/// <returns>带有结果对象的数据信息</returns>
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public static OperateResult<byte[]> ReceiveCommandLineFromSocket( Socket socket, byte endCode1, byte endCode2 )
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{
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List<byte> bufferArray = new List<byte>( );
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try
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{
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// 接收到endCode为止
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while (true)
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{
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byte[] head = NetSupport.ReadBytesFromSocket( socket, 1 );
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bufferArray.AddRange( head );
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if (head[0] == endCode2)
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{
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if(bufferArray.Count > 0 && bufferArray.Last( ) == endCode1)
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{
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break;
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}
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}
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}
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// 指令头已经接收完成
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return OperateResult.CreateSuccessResult( bufferArray.ToArray( ) );
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}
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catch (Exception ex)
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{
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socket?.Close( );
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return new OperateResult<byte[]>( ex.Message );
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}
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}
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/// <summary>
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/// 从socket套接字读取数据并写入流中，必然报告进度
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/// </summary>
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/// <param name="socket">通信对象</param>
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/// <param name="stream">stream</param>
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/// <param name="receive">接收的长度</param>
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/// <param name="report">用于报告接收进度的对象</param>
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/// <param name="reportByPercent">是否按照百分比报告进度</param>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="SocketException"></exception>
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/// <exception cref="ObjectDisposedException"></exception>
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/// <exception cref="System.Security.SecurityException"></exception>
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/// <example>
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/// 举例从socket读取数据，然后写入到文件流中
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/// <code lang="cs" source="HslCommunication_Net45.Test\Documentation\Samples\Core\NetSupport.cs" region="WriteStreamFromSocketExample" title="WriteStreamFromSocket示例" />
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/// </example>
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public static void WriteStreamFromSocket( Socket socket, Stream stream, long receive, Action<long, long> report, bool reportByPercent )
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{
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byte[] buffer = new byte[SocketBufferSize];
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long count_receive = 0;
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long percent = 0;
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while (count_receive < receive)
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{
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// 分割成4KB来接收数据
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int current = socket.Receive( buffer, 0, SocketBufferSize, SocketFlags.None );
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count_receive += current;
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stream.Write( buffer, 0, current );
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if (reportByPercent)
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{
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long percentCurrent = count_receive * 100 / receive;
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if (percent != percentCurrent)
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{
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percent = percentCurrent;
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// 报告进度
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report?.Invoke( count_receive, receive );
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}
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}
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else
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{
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// 报告进度
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report?.Invoke( count_receive, receive );
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}
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// 回发进度
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socket.Send( BitConverter.GetBytes( count_receive ) );
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}
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}
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/// <summary>
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/// 读取流并将数据写入socket
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/// </summary>
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/// <param name="stream">文件流</param>
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/// <param name="socket">连接的套接字</param>
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/// <param name="length">返回的文件长度</param>
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/// <param name="report">发送的进度报告</param>
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/// <param name="reportByPercent">是否按照百分比报告进度</param>
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/// <exception cref="SocketException"></exception>
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/// <exception cref="IOException"></exception>
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/// <exception cref="NotSupportedException"></exception>
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/// <exception cref="ObjectDisposedException"></exception>
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/// <example>
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/// 举例从文件读取数据，然后写入到套接字中，相当于发送文件到socket
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/// <code lang="cs" source="HslCommunication_Net45.Test\Documentation\Samples\Core\NetSupport.cs" region="WriteSocketFromStreamExample" title="WriteSocketFromStream示例" />
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/// </example>
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public static void WriteSocketFromStream( Socket socket, Stream stream, long length, Action<long, long> report, bool reportByPercent )
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{
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byte[] buffer = new byte[SocketBufferSize];
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long count_send = 0;
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stream.Position = 0;
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long percent = 0;
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while (count_send < length)
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{
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int count = stream.Read( buffer, 0, SocketBufferSize );
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count_send += count;
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socket.Send( buffer, 0, count, SocketFlags.None );
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while (count_send != BitConverter.ToInt64( ReadBytesFromSocket( socket, 8 ), 0 )) ;
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long received = count_send;
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if (reportByPercent)
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{
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long percentCurrent = received * 100 / length;
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if (percent != percentCurrent)
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{
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percent = percentCurrent;
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// 报告进度
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report?.Invoke( received, length );
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}
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}
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else
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{
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// 报告进度
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report?.Invoke( received, length );
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}
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// 双重接收验证
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if (count == 0)
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{
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break;
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}
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}
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}
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}
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#endregion
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}
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