用TCPclient做的管道不支持大数据发送和接收,怎么修改成哪个管道合适,vb.net做的redis接口
如何修改支持管道大数据发送和接收
Public Class RedisClient
Private client As TcpClient
Private stream As NetworkStream
Private reply As RedisReply
Private command As IRedisCommand
Private memStream As MemoryStream
Public ReadOnly Property Host As String
Public ReadOnly Property Port As Integer
Public ReadOnly Property [Return] As Object
Get
Return reply.Value
End Get
End Property
Public Sub New(Optional host As String = "127.0.0.1", Optional port As Integer = 6379)
If IsNothing(host) Then
Throw New ArgumentNullException(NameOf(host))
End If
Me.Host = host
Me.Port = port
**client = New TcpClient()
Try
client.Connect(host, port)
stream = client.GetStream()**
Catch ex As Exception
Throw New RedisException("An existing connection was forcibly closed by remote host.")
End Try
End Sub
Public Sub Quit()
command = New QuitCommand()
Execute(command)
End Sub
Public Sub Append(key As String, value As String)
command = New AppendCommand() With {.Key = key, .Value = value}
Execute(command)
End Sub
Public Sub Del(ParamArray keys() As String)
command = New DelCommand() With {.Keys = keys}
Execute(command)
End Sub
Public Function Dump(key As String) As Byte()
command = New DumpCommand() With {.Key = key}
Execute(command)
If IsNothing(reply.Value) Then
Return Nothing
Else
Return Encoding.UTF8.GetBytes(reply.Value)
End If
End Function
Public Sub Echo(message As String)
command = New EchoCommand() With {.Message = message}
Execute(command)
End Sub
Public Function Exists(key As String) As Boolean
command = New ExistsCommand() With {.Key = key}
Execute(command)
Return reply.Value
End Function
Public Sub Expire(key As String, timeout As Integer)
command = New ExpireCommand() With {.Key = key, .Timeout = timeout}
Execute(command)
End Sub
Public Sub ExpireAt(key As String, ttl As DateTime)
command = New ExpireAtCommand() With {.Key = key, .TTL = (ttl - #1/1/1970#).TotalSeconds}
Execute(command)
End Sub
Public Function Get As String
command = New GetCommand() With {.Key = key}
Execute(command)
Return reply.Value
End Function
Public Sub PExpire(key As String, timeout As Integer)
command = New PExpireCommand() With {.Key = key, .Timeout = timeout}
Execute(command)
End Sub
Public Sub PExpireAt(key As String, ttl As DateTime)
command = New PExpireAtCommand() With {.Key = key, .TTL = (ttl - #1/1/1970#).TotalMilliseconds}
Execute(command)
End Sub
Public Sub Ping()
command = New PingCommand()
Execute(command)
End Sub
Public Sub Auth(password As String)
command = New AuthCommand() With {.Password = password}
Execute(command)
End Sub
Public Sub Select
command = New SelectCommand() With {.Index = index}
Execute(command)
End Sub
Public Sub Set
command = New SetCommand() With {.Key = key, .Value = value, .ExpireTime = expireTime, .Override = override}
Execute(command)
End Sub
Public Function Time() As Date
command = New TimeCommand()
Execute(command)
Return #1/1/1970#.AddSeconds(reply.Value(0)).ToLocalTime()
End Function
Private Sub Execute(command As IRedisCommand)
**Dim bytes() As Byte = Encoding.UTF8.GetBytes(command.GetCommand() & vbCrLf)
Try
stream.Write(bytes, 0, bytes.Length)
stream.Flush()
ReDim bytes(client.ReceiveBufferSize)
stream.Read(bytes, 0, bytes.Length)**
Dim result = Encoding.UTF8.GetString(bytes)
Select Case result(0)
Case "$"
Dim length = Convert.ToInt32(result.Substring(1, result.IndexOf(vbCrLf) - 1))
If length = -1 Then
reply = New RedisReply(RESPType.BulkString, Nothing)
Else
reply = New RedisReply(RESPType.BulkString, result.Substring(result.IndexOf(vbCrLf) + 2, length))
End If
Case "+"
reply = New RedisReply(RESPType.SimpleString, result.Substring(1, result.IndexOf(vbCrLf) - 1))
Case ":"
reply = New RedisReply(RESPType.Integer, Convert.ToInt32(result.Substring(1, result.IndexOf(vbCrLf) - 1)))
Case "-"
reply = New RedisReply(RESPType.Error, result.Substring(1, result.IndexOf(vbCrLf) - 1))
Throw New RedisException(reply.Value)
Case "*"
Dim count = Convert.ToInt32(result.Substring(1, result.IndexOf(vbCrLf) - 1))
Dim items = result.Split(New Char() {vbCrLf, vbLf}, StringSplitOptions.RemoveEmptyEntries).ToList()
items.RemoveAt(0)
items.RemoveAll(Function(i) i.StartsWith("$"))
items.RemoveAt(items.Count - 1)
'reply = New RedisReply(RESPType.Array, items)
End Select
Catch ex As Exception
Throw New RedisException($"There is an internal error during executing '{command.GetCommand()}'.")
End Try
End Sub
End Class
TCPClient作为TCP/IP协议栈上的客户端库,主要用于在客户端与服务器之间建立TCP连接。对于数据的发送和接收,TCPClient并没有直接支持大数据的发送和接收功能。
如果需要在VB.NET中使用TCPClient实现Redis的接口,可以考虑使用Redis.Net框架,这个框架提供了许多Redis功能的实现。
以下是一个简单的示例,展示如何使用Redis.Net和TCPClient在VB.NET中实现一个简单的Redis客户端:
```csharp using System; using System.Net; using System.Net.Sockets; using Redis.Net;
namespace RedisClientExample { class Program { static void Main(string[] args) { // 创建一个TCPClient对象,用于连接Redis服务器 TcpClient tcpClient = new TcpClient("127.0.0.1", 6379);
// 将TCPClient连接到Redis服务器
using (Socket socket = tcpClient.GetStream())
{
// 使用RedisNet连接Redis服务器
RedisConnection redisConnection = new RedisConnection(socket);
redisConnection.Connect();
// 执行一个命令
redisConnection.Execute("SET key value");
// 关闭Redis连接
redisConnection.Close();
}
}
}
class RedisConnection
{
private TcpClient socket;
public RedisConnection(Socket socket)
{
this.socket = socket;
}
public void Connect()
{
// 连接到Redis服务器
using (Socket stream = socket.GetStream())
{
// 将Redis连接到Redis服务器
RedisCommandResult commandResult = redisConnection.Execute("ping");
if (commandResult.Status != Status.Success)
{
throw new Exception("Redis连接失败: " + commandResult.Status);
}
}
}
}
class RedisCommandResult
{
public Status Status { get; set; }
public object Value { get; set; }
}
class Status
{
public Status(string status)
{
this.Status = status;
}
public string Status { get; set; }
}
} ```
这个示例中,我们首先创建了一个TCPClient对象,然后使用这个对象连接到Redis服务器。然后,我们执行了一个命令(在这里是“ping”命令),并检查了命令的返回值。如果命令失败,我们将抛出一个异常。最后,我们关闭了Redis连接。