PHP Extension

WebSocket over TLS

See more WebSocket Examples

Establishing a WebSocket connection over TLS is exactly the same as for TCP, except for a few arguments passed to the Connect method. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

// --------------------------------------------------
// A WebSocket connection begins life as an HTTP GET request containing a few special header fields,
// such as "Upgrade: websocket".   

// Your application will use the Chilkat Rest class to send the initial HTTP GET.  This allows you
// to use the full capability of the Chilkat Rest class to customize the GET for any particular situation.
// For example:
// 
//   - If custom HTTP request header fields must be added.
//   - If authentication is required, such as OAuth2, OAuth1, Basic HTTP Auth, etc.
//   - If HTTPS, SSH Tunneling, Proxies (HTTP or SOCKS), or other advanced connection or TLS features are required.
// 

$rest = new CkRest();
// ------------------------------------------------------------------
// To use TLS, connect to the TLS port (typically 443) and tell the rest.Connect method
// that it's a TLS connection.
// ------------------------------------------------------------------
$bUseTls = true;
$success = $rest->Connect('someserver.com',443,$bUseTls,false);
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

$ws = new CkWebSocket();

// Tell the WebSocket to use this connection.
$success = $ws->UseConnection($rest);
if ($success != true) {
    print $ws->lastErrorText() . "\n";
    exit;
}

// Add the standard WebSocket open handshake headers that will be needed.
// (This adds the required HTTP request headers to the rest object.)
$ws->AddClientHeaders();

// Add any additional headers that might be desired.
// Two common WebSocketSpecific headers are "Sec-WebSocket-Protocol" and "Origin".
$rest->AddHeader('Sec-WebSocket-Protocol','x-something');
$rest->AddHeader('Origin','http://someserver.com');

// Do the open handshake.
$responseBody = $rest->fullRequestNoBody('GET','/something');
if ($rest->get_LastMethodSuccess() != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

// If successful, the HTTP response status code should be 101,
// and the response body will be empty. (If it failed, we'll have a look
// at the response body..)
$statusCode = $rest->get_ResponseStatusCode();
print 'Response status code: ' . $statusCode . "\n";

if ($statusCode != 101) {
    print $responseBody . "\n";
    print '-- Failed because of unexpected response status code.' . "\n";
    exit;
}

// We have the expected 101 response, so let's now validate the 
// contents of the response, such as the value sent by the server in the
// Sec-WebSocket-Accept header. 
$success = $ws->ValidateServerHandshake();
if ($success != true) {
    print $ws->lastErrorText() . "\n";
    exit;
}

print 'WebSocket connection successful.' . "\n";

// The application may now begin sending and receiving frames on the WebSocket connection.
// (At this point, we're done with the rest object...)

?>