Buscando en internet sobre lo que quería hacer, pude encontrar información de websocket y vb.net para comunicarme con el navegador. Con ello pude lograr hacer una comunicación entre vb.net y el navegador mediante WebSocket. Desde mi servidor vb.net puedo enviar mensajes al cliente en el navegador y recibirlos perfectamente, pero no sé como recibir el mensaje que me envía el cliente. Estuve buscando sobre eso, y encontré un pregunta similar en stackoverflow, y el que hizo la pregunta pudo solucionar su problema (comentó la solución) pero no entiendo bien como implementar su código.. Alguien podría ayudarme?
SERVER VB.NET
Client
Respuesta para leer mensajes del cliente en el servidor (es lo que no entiendo)
https://stackoverflow.com/questions/24721957/websocket-server-client-server-frame-mask
Gracias de antemano
SERVER VB.NET
Código (vbnet) [Seleccionar]
Imports System.Net.Sockets
Imports System.Threading
Imports System.Net
Public Class Form1
Dim serverTcp As TcpListener
Dim serverThread As Thread
Dim host_ As String = ""
Dim curSocket As Socket
Sub Main()
'' Start server
serverThread = New Thread(AddressOf serverProc)
serverThread.Start()
End Sub
Private Sub serverProc()
Try
'' Listen to port 5665
serverTcp = New TcpListener(System.Net.IPAddress.Parse(host_), 5665)
serverTcp.Start()
Console.WriteLine("Listen to port 5665 ...")
'' Accept any connection
While (True)
curSocket = serverTcp.AcceptSocket()
Dim thread As New Thread(AddressOf clientProc)
thread.Start(curSocket)
End While
Catch ex As Exception
End Try
End Sub
Private Sub clientProc(ByVal sck As Socket)
Try
Dim netStream As New NetworkStream(sck)
Dim netReader As New IO.StreamReader(netStream)
Dim netWriter As New IO.StreamWriter(netStream)
Dim key As String = ""
Console.WriteLine("Accept new connection ...")
'' Reading handshake message
While (True)
Dim line As String = netReader.ReadLine()
If line.Length = 0 Then
Exit While
End If
If (line.StartsWith("Sec-WebSocket-Key: ")) Then
key = line.Split(":")(1).Trim()
End If
Console.WriteLine("Data: " & line)
End While
'' Calculate accept-key
key += "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
key = getSHA1Hash(key)
'' Response handshake message
Dim response As String
response = "HTTP/1.1 101 Switching Protocols" & vbCrLf
response &= "Upgrade: websocket" & vbCrLf
response &= "Connection: Upgrade" & vbCrLf
response &= "Sec-WebSocket-Accept: " & key & vbCrLf & vbCrLf
netWriter.Write(response)
netWriter.Flush()
'' Sending message
SendMessage(sck, "SEND.. VB.NET")
Catch ex As Exception
End Try
End Sub
Sub Msg(t As String)
Console.WriteLine(t)
End Sub
Function getSHA1Hash(ByVal strToHash As String) As String
Dim sha1Obj As New System.Security.Cryptography.SHA1CryptoServiceProvider
Dim bytesToHash() As Byte = System.Text.Encoding.ASCII.GetBytes(strToHash)
Dim result As String
bytesToHash = sha1Obj.ComputeHash(bytesToHash)
result = Convert.ToBase64String(bytesToHash)
Return result
End Function
Sub SendMessage(sck As Socket, message As String)
Dim rawData = System.Text.Encoding.UTF8.GetBytes(message)
Dim frameCount = 0
Dim frame(10) As Byte
frame(0) = CByte(129)
If rawData.Length <= 125 Then
frame(1) = CByte(rawData.Length)
frameCount = 2
ElseIf rawData.Length >= 126 AndAlso rawData.Length <= 65535 Then
frame(1) = CByte(126)
Dim len = CByte(rawData.Length)
frame(2) = CByte(((len >> 8) & CByte(255)))
frame(3) = CByte((len & CByte(255)))
frameCount = 4
Else
frame(1) = CByte(127)
Dim len = CByte(rawData.Length)
frame(2) = CByte(((len >> 56) & CByte(255)))
frame(3) = CByte(((len >> 48) & CByte(255)))
frame(4) = CByte(((len >> 40) & CByte(255)))
frame(5) = CByte(((len >> 32) & CByte(255)))
frame(6) = CByte(((len >> 24) & CByte(255)))
frame(7) = CByte(((len >> 16) & CByte(255)))
frame(8) = CByte(((len >> 8) & CByte(255)))
frame(9) = CByte((len & CByte(255)))
frameCount = 10
End If
Dim bLength = frameCount + rawData.Length
Console.WriteLine(frameCount)
Console.WriteLine(rawData.Length)
Dim reply(bLength + 1) As Byte
Dim bLim = 0
For i = 0 To frameCount - 1
Console.WriteLine(bLim)
reply(bLim) = frame(i)
bLim += 1
Next
For i = 0 To rawData.Length - 1
Console.WriteLine(bLim)
reply(bLim) = rawData(i)
bLim += 1
Next
sck.Send(reply)
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
host_ = Dns.GetHostEntry(Dns.GetHostName()).AddressList _
.Where(Function(a As IPAddress) Not a.IsIPv6LinkLocal AndAlso Not a.IsIPv6Multicast AndAlso Not a.IsIPv6SiteLocal) _
.Last() _
.ToString()
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Main()
End Sub
Private Sub btnEnviarMensaje_Click(sender As Object, e As EventArgs) Handles btnEnviarMensaje.Click
SendMessage(curSocket, txtMensaje.Text)
End Sub
End Class
Client
Código (javascript) [Seleccionar]
function connect(host) {
var ws = new WebSocket(host);
ws.onopen = function () {
console('connected');
//ws.send("test");
};
ws.onmessage = function (evt) {
console('reveived data:'+evt.data);
};
ws.onclose = function () {
console('socket closed');
};
Respuesta para leer mensajes del cliente en el servidor (es lo que no entiendo)
https://stackoverflow.com/questions/24721957/websocket-server-client-server-frame-mask
Gracias de antemano