(CkPython) Socket Send and Receive BinData

Demonstrates the Chilkat Socket ReceiveBdN and SendBd methods.

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

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

sock = chilkat.CkSocket()

# --------------------------------------------------------------------
# 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.put_MaxReadIdleMs(2000)

# Send 26 bytes contained in a Chilkat BinData
bdToSend = chilkat.CkBinData()
i = 0
byteVal = 65
while i < 26 :
    bdToSend.AppendByte(byteVal)
    byteVal = byteVal + 1
    i = i + 1

# Send the contents of the BinData
# Pass zero's in the 2nd and 3rd arguments to send the entire contents of the BinData.
sock.SendBd(bdToSend,0,0)

# 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 bytes back..
bdRecv = chilkat.CkBinData()
# Receive the 26 bytes previously sent, plus the LF char.
success = sock.ReceiveBdN(27,bdRecv)
if (success == False):
    print(sock.lastErrorText())
    sys.exit()

# Show the contents of bdRecv in hex format
print(bdRecv.getEncoded("hex"))

# Output:  4142434445464748494A4B4C4D4E4F505152535455565758595A0A