RedisHelper.cs
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using HslCommunication.Core;
using System;
using System.Collections.Generic;
using System.Net.Sockets;
using System.Text;
namespace HslCommunication.Enthernet.Redis
{
/// <summary>
/// 提供了redis辅助类的一些方法
/// </summary>
public class RedisHelper
{
#region Socket Helper
/// <summary>
/// 接收一行命令数据
/// </summary>
/// <param name="socket">网络套接字</param>
/// <returns>带有结果对象的数据信息</returns>
public static OperateResult<byte[]> ReceiveCommandLine(Socket socket)
{
return NetSupport.ReceiveCommandLineFromSocket(socket, (byte)'\n');
}
/// <summary>
/// 接收一行字符串的信息
/// </summary>
/// <param name="socket">网络套接字</param>
/// <param name="length">字符串的长度</param>
/// <returns>带有结果对象的数据信息</returns>
public static OperateResult<byte[]> ReceiveCommandString(Socket socket, int length)
{
try
{
List<byte> bufferArray = new List<byte>();
bufferArray.AddRange(NetSupport.ReadBytesFromSocket(socket, length));
OperateResult<byte[]> commandTail = ReceiveCommandLine(socket);
if (!commandTail.IsSuccess) return commandTail;
bufferArray.AddRange(commandTail.Content);
return OperateResult.CreateSuccessResult(bufferArray.ToArray());
}
catch (Exception ex)
{
return new OperateResult<byte[]>(ex.Message);
}
}
/// <summary>
/// 从网络接收一条redis消息
/// </summary>
/// <param name="socket">网络套接字</param>
/// <returns>接收的结果对象</returns>
public static OperateResult<byte[]> ReceiveCommand(Socket socket)
{
List<byte> bufferArray = new List<byte>();
OperateResult<byte[]> readCommandLine = ReceiveCommandLine(socket);
if (!readCommandLine.IsSuccess) return readCommandLine;
bufferArray.AddRange(readCommandLine.Content);
if (readCommandLine.Content[0] == '+' || readCommandLine.Content[0] == '-' || readCommandLine.Content[0] == ':')
{
// 状态回复，错误回复，整数回复
return OperateResult.CreateSuccessResult(bufferArray.ToArray());
}
else if (readCommandLine.Content[0] == '$')
{
// 批量回复，允许最大512M字节
OperateResult<int> lengthResult = GetNumberFromCommandLine(readCommandLine.Content);
if (!lengthResult.IsSuccess) return OperateResult.CreateFailedResult<byte[]>(lengthResult);
if (lengthResult.Content < 0) return OperateResult.CreateSuccessResult(bufferArray.ToArray());
// 接收字符串信息
OperateResult<byte[]> receiveContent = ReceiveCommandString(socket, lengthResult.Content);
if (!receiveContent.IsSuccess) return receiveContent;
bufferArray.AddRange(receiveContent.Content);
return OperateResult.CreateSuccessResult(bufferArray.ToArray());
}
else if (readCommandLine.Content[0] == '*')
{
// 多参数的回复
OperateResult<int> lengthResult = GetNumberFromCommandLine(readCommandLine.Content);
if (!lengthResult.IsSuccess) return OperateResult.CreateFailedResult<byte[]>(lengthResult);
for (int i = 0; i < lengthResult.Content; i++)
{
OperateResult<byte[]> receiveCommand = ReceiveCommand(socket);
if (!receiveCommand.IsSuccess) return receiveCommand;
bufferArray.AddRange(receiveCommand.Content);
}
return OperateResult.CreateSuccessResult(bufferArray.ToArray());
}
else
{
return new OperateResult<byte[]>("Not Supported HeadCode: " + readCommandLine.Content[0]);
}
}
#endregion
#region Prase Helper
/// <summary>
/// 将字符串数组打包成一个redis的报文信息
/// </summary>
/// <param name="commands">字节数据信息</param>
/// <returns>结果报文信息</returns>
public static byte[] PackStringCommand(string[] commands)
{
StringBuilder sb = new StringBuilder();
sb.Append('*');
sb.Append(commands.Length.ToString());
sb.Append("\r\n");
for (int i = 0; i < commands.Length; i++)
{
sb.Append('$');
sb.Append(Encoding.UTF8.GetBytes(commands[i]).Length.ToString());
sb.Append("\r\n");
sb.Append(commands[i]);
sb.Append("\r\n");
}
return Encoding.UTF8.GetBytes(sb.ToString());
}
/// <summary>
/// 从原始的结果数据对象中提取出数字数据
/// </summary>
/// <param name="commandLine">原始的字节数据</param>
/// <returns>带有结果对象的数据信息</returns>
public static OperateResult<int> GetNumberFromCommandLine(byte[] commandLine)
{
try
{
string command = Encoding.UTF8.GetString(commandLine).TrimEnd('\r', '\n');
return OperateResult.CreateSuccessResult(Convert.ToInt32(command.Substring(1)));
}
catch (Exception ex)
{
return new OperateResult<int>(ex.Message);
}
}
/// <summary>
/// 从原始的结果数据对象中提取出数字数据
/// </summary>
/// <param name="commandLine">原始的字节数据</param>
/// <returns>带有结果对象的数据信息</returns>
public static OperateResult<long> GetLongNumberFromCommandLine(byte[] commandLine)
{
try
{
string command = Encoding.UTF8.GetString(commandLine).TrimEnd('\r', '\n');
return OperateResult.CreateSuccessResult(Convert.ToInt64(command.Substring(1)));
}
catch (Exception ex)
{
return new OperateResult<long>(ex.Message);
}
}
/// <summary>
/// 从结果的数据对象里提取字符串的信息
/// </summary>
/// <param name="commandLine">原始的字节数据</param>
/// <returns>带有结果对象的数据信息</returns>
public static OperateResult<string> GetStringFromCommandLine(byte[] commandLine)
{
try
{
if (commandLine[0] != '$') return new OperateResult<string>(Encoding.UTF8.GetString(commandLine));
// 先找到换行符
int index_start = -1;
int index_end = -1;
// 下面的判断兼容windows系统及linux系统
for (int i = 0; i < commandLine.Length; i++)
{
if (commandLine[i] == '\r' || commandLine[i] == '\n')
{
index_start = i;
}
if (commandLine[i] == '\n')
{
index_end = i;
break;
}
}
int length = Convert.ToInt32(Encoding.UTF8.GetString(commandLine, 1, index_start - 1));
if (length < 0) return new OperateResult<string>("(nil) None Value");
return OperateResult.CreateSuccessResult(Encoding.UTF8.GetString(commandLine, index_end + 1, length));
}
catch (Exception ex)
{
return new OperateResult<string>(ex.Message);
}
}
/// <summary>
/// 从redis的结果数据中分析出所有的字符串信息
/// </summary>
/// <param name="commandLine">结果数据</param>
/// <returns>带有结果对象的数据信息</returns>
public static OperateResult<string[]> GetStringsFromCommandLine(byte[] commandLine)
{
try
{
List<string> lists = new List<string>();
if (commandLine[0] != '*') return new OperateResult<string[]>(Encoding.UTF8.GetString(commandLine));
int index = 0;
for (int i = 0; i < commandLine.Length; i++)
{
if (commandLine[i] == '\r' || commandLine[i] == '\n')
{
index = i;
break;
}
}
int length = Convert.ToInt32(Encoding.UTF8.GetString(commandLine, 1, index - 1));
for (int i = 0; i < length; i++)
{
// 提取所有的字符串内容
int index_end = -1;
for (int j = index; j < commandLine.Length; j++)
{
if (commandLine[j] == '\n')
{
index_end = j;
break;
}
}
index = index_end + 1;
if (commandLine[index] == '$')
{
// 寻找子字符串
int index_start = -1;
for (int j = index; j < commandLine.Length; j++)
{
if (commandLine[j] == '\r' || commandLine[j] == '\n')
{
index_start = j;
break;
}
}
int stringLength = Convert.ToInt32(Encoding.UTF8.GetString(commandLine, index + 1, index_start - index - 1));
if (stringLength >= 0)
{
for (int j = index; j < commandLine.Length; j++)
{
if (commandLine[j] == '\n')
{
index_end = j;
break;
}
}
index = index_end + 1;
lists.Add(Encoding.UTF8.GetString(commandLine, index, stringLength));
index = index + stringLength;
}
else
{
lists.Add(null);
}
}
else
{
int index_start = -1;
for (int j = index; j < commandLine.Length; j++)
{
if (commandLine[j] == '\r' || commandLine[j] == '\n')
{
index_start = j;
break;
}
}
lists.Add(Encoding.UTF8.GetString(commandLine, index, index_start - index - 1));
}
}
return OperateResult.CreateSuccessResult(lists.ToArray());
}
catch (Exception ex)
{
return new OperateResult<string[]>(ex.Message);
}
}
#endregion
}
}