VBScript

TCP Socket Send Byte and Receive Byte

Demonstrates the Chilkat Socket ReceiveByte and SendByte method. VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

set sock = CreateObject("Chilkat.Socket")

' --------------------------------------------------------------------
' This example uses the public TCP echo service at https://tcpbin.com/
' --------------------------------------------------------------------

useTls = 0
port = 4242
maxWaitMs = 5000
success = sock.Connect("tcpbin.com",port,useTls,maxWaitMs)
If (success = 0) Then
    outFile.WriteLine(sock.LastErrorText)
    WScript.Quit
End If

' Wait a max of 2 seconds for a response..
sock.MaxReadIdleMs = 2000

' Send a byte.
success = sock.SendByte(96)

' The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
success = sock.SendByte(10)

' The echo server will echo back whatever is sent to it.
' We should be able to read the same byte back..
' After successfully reading, the byte value is available in the ReceivedInt property.
treatAsUnsignedInt = 1
success = sock.ReceiveByte(treatAsUnsignedInt)
If (success = 0) Then
    outFile.WriteLine(sock.LastErrorText)
    WScript.Quit
End If

' Let's look at the value of the byte received.  It should be 96.
outFile.WriteLine(sock.ReceivedInt)

' The echo server also echoed the LF back.
success = sock.ReceiveByte(treatAsUnsignedInt)
' Assuming success..

' Should be decimal 10.
outFile.WriteLine(sock.ReceivedInt)

outFile.Close