Wait for a Socket to Become Readable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForReading, which waits for read-ready activity on the socket, or on any contained socket when the object is a socket set. It returns 1 if ready, 0 on timeout, or -1 on error.

Dim success As Boolean = False

Dim socket As ChilkatSocket
socket.Initialize("socket")

'  Connect to the server using TLS.
Dim bTls As Boolean = True
Dim maxWaitMs As Int = 5000
success = socket.Connect("example.com", 5000, bTls, maxWaitMs)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If


'  Wait up to 5 seconds for read-ready activity on the socket (or, for a socket set, on any contained
'  socket).  Returns 1 if ready, 0 on timeout, or -1 on error.
Dim ready As Int = socket.SelectForReading(5000)
If ready < 0 Then
    Log(socket.LastErrorText)
    Return
End If

If ready <> 1 Then
    Log("No data became available before the timeout.")
    Return
End If

Log("The socket has data ready to read.")