(JavaScript) TCP Socket Send Byte and Receive Byte

Demonstrates the Chilkat Socket ReceiveByte and SendByte method.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var sock = new CkSocket();

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

var useTls = false;
var port = 4242;
var maxWaitMs = 5000;
success = sock.Connect("tcpbin.com",port,useTls,maxWaitMs);
if (success == false) {
    console.log(sock.LastErrorText);
    return;
}

// 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.
var treatAsUnsignedInt = true;
success = sock.ReceiveByte(treatAsUnsignedInt);
if (success == false) {
    console.log(sock.LastErrorText);
    return;
}

// Let's look at the value of the byte received.  It should be 96.
console.log(sock.ReceivedInt);

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

// Should be decimal 10.
console.log(sock.ReceivedInt);