Es necesario "extraer" una corriente de calcetines ...
Imports System.IO
Imports System.Net
Imports System.Net.Sockets
Imports System.Text
Imports System.Runtime.CompilerServices
Public Class Form1
Sub Form1_Load() Handles Me.Load
Dim Host As String = "google.com"
Dim P As New SocksProxy("localhost", 64129) 'Set your socks proxy here
Dim Stream As NetworkStream = P.GetStream(Host, 80)
Dim buffer As Byte() = Download(Stream, Host, "")
My.Computer.FileSystem.WriteAllBytes("C:\webpage.html", buffer, False)
MsgBox("ok")
End Sub
Function Download(Stream As NetworkStream, Host As String, Resource As String) As Byte()
Using writer = New StreamWriter(Stream)
writer.Write(String.Format("GET /{2} HTTP/1.1{0}Host: {1}{0}{0}", vbCrLf, Host, Resource))
writer.Flush()
Dim byteList As New List(Of Byte)
Dim bufferSize As Integer = 4096
Dim buffer(bufferSize - 1) As Byte
Do
Dim bytesRead As Integer = Stream.Read(buffer, 0, bufferSize)
byteList.AddRange(buffer.Take(bytesRead))
Loop While Stream.DataAvailable
Return byteList.ToArray
End Using
End Function
End Class
Public Class SocksProxy
Private _SocksHost As String
Private _SocksPort As Integer
Sub New(SocksHost As String, SocksPort As Integer)
_SocksHost = SocksHost
_SocksPort = SocksPort
End Sub
Function GetStream(HostDest As String, PortDest As Short) As NetworkStream
Dim client As TcpClient = New TcpClient()
client.Connect(_SocksHost, _SocksPort)
Dim stream As NetworkStream = client.GetStream()
'Auth
Dim buf = New Byte(299) {}
buf(0) = &H5
buf(1) = &H1
buf(2) = &H0
stream.Write(buf, 0, 3)
ReadExactSize(stream, buf, 0, 2)
If buf(0) <> &H5 Then
Throw New IOException("Invalid Socks Version")
End If
If buf(1) = &HFF Then
Throw New IOException("Socks Server does not support no-auth")
End If
If buf(1) <> &H0 Then
Throw New Exception("Socks Server did choose bogus auth")
End If
buf(0) = &H5
buf(1) = &H1
buf(2) = &H0
buf(3) = &H3
Dim domain = Encoding.ASCII.GetBytes(HostDest)
buf(4) = CByte(domain.Length)
Array.Copy(domain, 0, buf, 5, domain.Length)
Dim port = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(CShort(PortDest)))
buf(5 + domain.Length) = port(0)
buf(6 + domain.Length) = port(1)
stream.Write(buf, 0, domain.Length + 7)
' Reply
ReadExactSize(stream, buf, 0, 4)
If buf(0) <> &H5 Then
Throw New IOException("Invalid Socks Version")
End If
If buf(1) <> &H0 Then
Throw New IOException(String.Format("Socks Error {0:X}", buf(1)))
End If
Dim rdest = String.Empty
Select Case buf(3)
Case &H1
' IPv4
ReadExactSize(stream, buf, 0, 4)
Dim v4 = BitConverter.ToUInt32(buf, 0)
rdest = New IPAddress(v4).ToString()
Exit Select
Case &H3
' Domain name
ReadExactSize(stream, buf, 0, 1)
If buf(0) = &HFF Then
Throw New IOException("Invalid Domain Name")
End If
ReadExactSize(stream, buf, 1, buf(0))
rdest = Encoding.ASCII.GetString(buf, 1, buf(0))
Exit Select
Case &H4
' IPv6
Dim octets = New Byte(15) {}
ReadExactSize(stream, octets, 0, 16)
rdest = New IPAddress(octets).ToString()
Exit Select
Case Else
Throw New IOException("Invalid Address type")
End Select
ReadExactSize(stream, buf, 0, 2)
Dim rport = CUShort(IPAddress.NetworkToHostOrder(CShort(BitConverter.ToUInt16(buf, 0))))
Return stream
End Function
Private Sub ReadExactSize(stream As NetworkStream, buffer As Byte(), offset As Integer, size As Integer)
While size <> 0
Dim read = stream.Read(buffer, offset, size)
If read < 0 Then
Throw New IOException("Premature end")
End If
size -= read
offset += read
End While
End Sub
End Class
argh ... derecha. entonces ¿puedo usarlo * de alguna manera * para hacer una solicitud? – Lay
Lay: no se incluye nada en .NET para reenviar cosas HTTP a través de un proxy SOCKS. –