Send a 4-byte Length Prefix over a Socket

See more Socket/SSL/TLS Examples

Demonstrates Socket.SendCount, which sends a four-byte length prefix in network byte order. This is typically used to tell the peer how many bytes follow.

Dim success As Boolean
success = False

Dim socket As New Chilkat.Socket

//  Connect to the server using TLS.
Dim bTls As Boolean
bTls = True
Dim maxWaitMs As Int32
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = False) Then
    System.DebugLog(socket.LastErrorText)
    Return
End If

//  Send a four-byte length prefix in network byte order.  A common framing pattern is to send the
//  number of bytes in a message before the message itself, so the peer knows exactly how many bytes
//  to read.
Dim messageLength As Int32
messageLength = 512
success = socket.SendCount(messageLength)
If (success = False) Then
    System.DebugLog(socket.LastErrorText)
    Return
End If

System.DebugLog("Length prefix sent.")