JavaScript

Receive a String from a Socket

Demonstrates Socket.ReceiveString, which receives text and decodes it using StringCharset. It returns the first nonempty decoded result rather than draining all available data.

Background. Text send and receive operations encode and decode bytes using the StringCharset property. For plain ASCII or UTF-8 protocols, setting StringCharset to utf-8 is a safe default.

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.  The 3rd argument enables the TLS handshake after the TCP
//  connection succeeds; the 4th is the maximum time to wait, in milliseconds.
var bTls = true;
var maxWaitMs = 5000;
success = socket.Connect("example.com",5000,bTls,maxWaitMs);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  StringCharset controls the character encoding used when sending and receiving text.
socket.StringCharset = "utf-8";
//  Send a request using a simple application-defined text protocol in which each message ends with a
//  CRLF.
var command = "STATUS\r\n";
success = socket.SendString(command);
if (success == false) {
    console.log(socket.LastErrorText);
    return;
}

//  Receive text and decode it using StringCharset.  ReceiveString returns the first nonempty decoded
//  result; it does not keep reading to drain all available data.
var responseText = socket.ReceiveString();
if (socket.LastMethodSuccess == false) {
    console.log(socket.LastErrorText);
    return;
}

console.log(responseText);