Asynchronous SSL Client Example

Demonstrates how to connect to an SSL server, send a simple message, receive a simple response, and disconnect. This example uses the asynchronous methods to connect, send, and receive.

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Dim socket As New Chilkat.Socket()

Dim success As Boolean
success = socket.UnlockComponent("Anything for 30-day trial")
If (success <> true) Then
    MsgBox("Failed to unlock component")
    Exit Sub
End If


Dim ssl As Boolean
ssl = true
Dim maxWaitMillisec As Long
maxWaitMillisec = 20000

'  The SSL server hostname may be an IP address, a domain name,
'  or "localhost".  You'll need to change this:
Dim sslServerHost As String
sslServerHost = "123.123.88.88"
Dim sslServerPort As Long
sslServerPort = 8123

'  Connect to the SSL server asynchronously in a background thread.
success = socket.AsyncConnectStart(sslServerHost,sslServerPort,ssl,maxWaitMillisec)
If (success <> true) Then
    MsgBox(socket.LastErrorText)
    Exit Sub
End If


'  Wait for the socket to become connected...
While (socket.AsyncConnectFinished <> true)
    '  Sleep 1 second.
    socket.SleepMs(1000)
End While

'  Did the connect fail?
If (socket.AsyncConnectSuccess <> true) Then
    MsgBox(socket.AsyncConnectLog)
    Exit Sub
End If


'  Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs = 20000
socket.MaxSendIdleMs = 20000

'  Send a "Hello Server! -EOM-" message:
success = socket.AsyncSendString("Hello Server! -EOM-")
If (success <> true) Then
    MsgBox(socket.LastErrorText)
    Exit Sub
End If


'  Wait for the send to finish
While (socket.AsyncSendFinished <> true)
    '  Sleep 1 second.
    socket.SleepMs(1000)
End While

'  Did the send fail?
If (socket.AsyncSendSuccess <> true) Then
    MsgBox(socket.AsyncSendLog)
    Exit Sub
End If


'  The server (in this example) is going to send a "Hello Client! -EOM-"
'  message.  Begin reading asynchronously in a background thread:
success = socket.AsyncReceiveUntilMatch("-EOM-")
If (success <> true) Then
    MsgBox(socket.LastErrorText)
    Exit Sub
End If


'  Wait for the background read to finish
While (socket.AsyncReceiveFinished <> true)
    '  Sleep 1 second.
    socket.SleepMs(1000)
End While

'  Did the receive fail?
If (socket.AsyncReceiveSuccess <> true) Then
    MsgBox(socket.AsyncReceiveLog)
    Exit Sub
End If


'  Display the received message:
MsgBox(socket.AsyncReceivedString)

'  Close the connection with the server
'  Wait a max of 20 seconds (20000 millsec)
socket.Close(20000)