JavaScript

Receive an Exact Number of Bytes into a BinData

Demonstrates Socket.ReceiveBdN, which receives exactly the requested number of bytes and appends them to a BinData, continuing until the full count is satisfied.

Background. Inactivity is controlled by MaxReadIdleMs: the call fails if incoming bytes halt for longer than MaxReadIdleMs milliseconds before the full amount is received. A single receive returns only what is currently available, whereas this counted receive waits for an exact number of bytes.

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.

JavaScript

var success = false;

var socket = new CkSocket();

//  Connect to the server using TLS.
var bTls = true;
var maxWaitMs = 5000;
success = socket.Connect("example.com",5000,bTls,maxWaitMs);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  MaxReadIdleMs controls the inactivity limit for receiving.  The ReceiveBdN call will fail if
//  incoming bytes halt for longer than this many milliseconds before the full amount is received.
socket.MaxReadIdleMs = 15000;

//  Receive exactly the requested number of bytes, appending them to a BinData.  The method continues
//  receiving until the full count is satisfied or a failure occurs.
var bd = new CkBinData();
success = socket.ReceiveBdN(256,bd);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

console.log("Received " + bd.NumBytes + " bytes.");