(Ruby) Socket Receive String Until Specific Byte Value is Received

Demonstrates the Chilkat Socket ReceiveStringUntilByte method.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

sock = Chilkat::CkSocket.new()

# --------------------------------------------------------------------
# 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() + "\n";
    exit
end

# Wait a max of 2 seconds for a response..
sock.put_MaxReadIdleMs(2000)

# Send some strings, each terminated by a 0 byte.
sock.SendString("This is the 1st string")
sock.SendByte(0)
sock.SendString("This is string number 2")
sock.SendByte(0)

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

# Now let's receive what is echoed back....
# Receive each string and the NULL byte.
# The call to ReceiveStringUntilByte will receive incoming data until the lookForByte is encountered.
# The lookForByte is receive and discarded (it is not returned in the string)
lookForByte = 0
s1 = sock.receiveStringUntilByte(lookForByte)
if (sock.get_LastMethodSuccess() == false)
    print sock.lastErrorText() + "\n";
    exit
end

print s1 + "\n";

s2 = sock.receiveStringUntilByte(lookForByte)
if (sock.get_LastMethodSuccess() == false)
    print sock.lastErrorText() + "\n";
    exit
end

print s2 + "\n";

# The echo server will also echo back the final LF
sock.ReceiveByte(true)
maxWaitMs = 100
sock.Close(100)

# Output:
# This is the 1st string
# This is string number 2