【解決方法】vb.net のプロキシ サーバー アプリケーション

Imports System '
Imports System.Net
Imports System.Net.Sockets
Imports System.Text
Imports System.IO
Imports System.Threading
Namespace WebProxy2
    Class WebProxy2
        Private clientSocket As Socket
        Private read() As [Byte] = New Byte(1024) {}
        Private Buffer As [Byte]() = Nothing
        Private ASCII As Encoding = Encoding.ASCII
        Private HTTP_VERSION As String = "HTTP/1.0"
        Private CRLF As String = ControlChars.Cr + ControlChars.Lf
        Private RecvBytes(4096) As [Byte]
        Public Sub New(ByVal socket As Socket)
            Me.clientSocket = socket
        End Sub 'New
        Public Sub run()
            Dim clientmessage As [String] = " "
            Dim sURL As [String] = " "
            Dim bytes As Integer = readmessage(read, clientSocket, clientmessage)
            If bytes = 0 Then
                Return
            End If
            Dim index1 As Integer = clientmessage.IndexOf(" "c)
            Dim index2 As Integer = clientmessage.IndexOf(" "c, index1 + 1)
            If index1 = -1 Or index2 = -1 Then
                Throw New IOException
            End If
            Console.WriteLine("Connecting to Site: {0}", clientmessage.Substring(index1 + 1, index2 - index1))
            Console.WriteLine("Connection from {0}", clientSocket.RemoteEndPoint)
            Dim part1 As String = clientmessage.Substring(index1 + 1, index2 - index1)
            Dim index3 As Integer = part1.IndexOf("/"c, index1 + 8)
            Dim index4 As Integer = part1.IndexOf(" "c, index1 + 8)
            Dim index5 As Integer = index4 - index3
            sURL = part1.Substring(index1 + 4, part1.Length - index5 - 8)

            Try
                Dim IPHost As IPHostEntry = Dns.Resolve(sURL)
                Console.WriteLine("Request resolved: ", IPHost.HostName)
                Dim aliases As String() = IPHost.Aliases
                Dim address As IPAddress() = IPHost.AddressList
                Console.WriteLine(address(0))
                Dim sEndpoint As New IPEndPoint(address(0), 80)
                Dim IPsocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
                IPsocket.Connect(sEndpoint)
                If IPsocket.Connected Then
                    Console.WriteLine("Socket connect OK")
                End If
                Dim [GET] As String = clientmessage
                Dim ByteGet As [Byte]() = ASCII.GetBytes([GET])
                IPsocket.Send(ByteGet, ByteGet.Length, 0)
                Dim rBytes As Int32 = IPsocket.Receive(RecvBytes, RecvBytes.Length, 0)
                Console.WriteLine("Recieved {0}", +rBytes)
                'Buffer = RecvBytes;
                ByteGet = RecvBytes
                Dim strRetPage As [String] = Nothing
                'strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, rBytes)
                While rBytes > 0
                    rBytes = IPsocket.Receive(RecvBytes, RecvBytes.Length, 0)
                    ' strRetPage = strRetPage + ASCII.GetString(RecvBytes, 0, rBytes)
                    Dim i As Int32 = UBound(ByteGet)
                    ReDim Preserve ByteGet(UBound(ByteGet) + rBytes + 1)
                    For x As Long = 1 To rBytes
                        ByteGet(i + x) = RecvBytes(x - 1)
                    Next
                End While
                IPsocket.Shutdown(SocketShutdown.Both)
                IPsocket.Close()
                strRetPage = strRetPage + ASCII.GetString(ByteGet, 0, ByteGet.Length)
                clientSocket.Send(ByteGet, ByteGet.Length, 0)
                ' sendmessage(clientSocket, strRetPage)

            Catch exc2 As Exception
                Console.WriteLine(exc2.ToString())
            End Try
        End Sub 'run
        Private Function readmessage(ByVal ByteArray() As Byte, ByRef s As Socket, ByRef clientmessage As String) As Integer
            Dim bytes As Integer = s.Receive(ByteArray, 1024, 0)
            Dim messagefromclient As String = Encoding.ASCII.GetString(ByteArray)
            clientmessage = CType(messagefromclient, [String])
            Return bytes
        End Function 'readmessage
        Private Sub sendmessage(ByVal s As Socket, ByVal message As String)
            Buffer = New [Byte](message.Length - 1) {}
            Dim length As Integer = ASCII.GetBytes(message, 0, message.Length, Buffer, 0)
            s.Send(Buffer, length, 0)
        End Sub 'sendmessage
        'Entry point which delegates to C-style main Private Function
        Overloads Sub Main()
            Main(System.Environment.GetCommandLineArgs())
        End Sub
        Overloads Shared Sub Main(ByVal args() As String)
            Const port As Integer = 8889
            Dim tcplistener As New TcpListener(port)
            Console.WriteLine("Listening on port {0}", +port)
            tcplistener.Start()
            While True
                Dim socket As Socket = tcplistener.AcceptSocket()
                Dim webproxy As New WebProxy2(socket)
                Dim thread As New Thread(New ThreadStart(AddressOf webproxy.run))
                thread.Start()
            End While
        End Sub 'Main
    End Class 'WebProxy2
End Namespace 'WebProxy2

プロキシ サーバーに Firefox または IE を構成すると、問題なくヘッダーを受け取ります。
サンプル ヘッダー

www.google.com
GET http://google.ca/ HTTP/1.1 Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/x-gsarcade-launch, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/x-silverlight, */* Accept-Language: en-us User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; InfoPath.2; .NET CLR 3.5.30729) Accept-Encoding: gzip, deflate Proxy-Connection: Keep-Alive Host: google.ca Cookie: PREF=ID=2cc48986d0a30551:U=4583f9a4276fb2df:FF=0:TM=1297940975:LM=1297941095:S=k0i-eurczYyMJF2q; NID=44=t7EdDRwCJHYI-iYWLo4NeRJ3DtFmv7wZ4yeUmEdemRP7X83I-kRJd6Ah3uf2rw-et_c_H5zYDd7vJuApaX0vs2K_jz30l7uQZPfmTdOeTvKpi67lXrbkiTP2DIOKeYew

私の質問は、これをブラウザに送り返してページを表示するにはどうすればよいですか?