TCP Socket Connect through HTTP Proxy

Demonstrates how to connect through an HTTP proxy server.

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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


'  To connect through an HTTP proxy, set the HttpProxyHostname
'  and HttpProxyPort properties to the hostname (or IP address)
'  and port of the HTTP proxy.  Typical port numbers used by
'  HTTP proxy servers are 3128 and 8080.
socket.HttpProxyHostname = "www.my-http-proxy.com"
socket.HttpProxyPort = 3128

'  Important:  Your HTTP proxy server must allow non-HTTP
'  traffic to pass.  Otherwise this does not work.


'  Connect (via the HTTP proxy) to port 5555 of 192.168.1.108.
'  hostname may be a domain name or IP address.
Dim hostname As String
hostname = "192.168.1.108"
Dim ssl As Boolean
ssl = false
Dim maxWaitMillisec As Long
maxWaitMillisec = 20000
success = socket.Connect(hostname,5555,ssl,maxWaitMillisec)
If (success <> true) Then
    MsgBox(socket.LastErrorText)
    Exit Sub
End If


'  Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs = 10000
socket.MaxSendIdleMs = 10000

'  The ficticious server (in this example) is going to send a "Hello World!"
'  message.  Read it:
Dim receivedMsg As String
receivedMsg = socket.ReceiveString()
If (receivedMsg = vbNullString ) Then
    MsgBox(socket.LastErrorText)
    Exit Sub
End If


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

MsgBox(receivedMsg)