Chilkat2-Python

TCP Socket Send Byte and Receive Byte

Demonstrates the Chilkat Socket ReceiveByte and SendByte method. Chilkat2-Python

import sys
import chilkat2

success = False

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

sock = chilkat2.Socket()

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

useTls = False
port = 4242
maxWaitMs = 5000
success = sock.Connect("tcpbin.com",port,useTls,maxWaitMs)
if (success == False):
    print(sock.LastErrorText)
    sys.exit()

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

# Send a byte.
sock.SendByte(96)

# The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
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 = True
success = sock.ReceiveByte(treatAsUnsignedInt)
if (success == False):
    print(sock.LastErrorText)
    sys.exit()

# Let's look at the value of the byte received.  It should be 96.
print(str(sock.ReceivedInt))

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

# Should be decimal 10.
print(str(sock.ReceivedInt))