(Perl) Send and Receive WebSocket Frame

Demonstrates how to send a websocket text frame to a websocket echo server. This example uses Chilkat's websocket test echo server at ws://websockets.chilkat.io/wsChilkatEcho.ashx

Note: The websockets.chilkat.io server imposes the following limitations:
Messages must be 16K or less, and each connection is limited to a max of 16 echoed messages.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$ws = chilkat::CkWebSocket->new();

# For brevity, this example does not check for errors when etablishing the WebSocket connection.
# See Establish WebSocket Connection for more complete sample code for making the connection.

$rest = chilkat::CkRest->new();
# Connect to websockets.chilkat.io
# IMPORTANT: websockets.chilkat.io accepts frames of up to 16K in size and echoes them back.
# IMPORTANT: The websockets.chilkat.io server imposes the following limitations: 
# ---------- Messages must be 16K or less, and each connection is limited to a max of 16 echoed messages.
$success = $rest->Connect("websockets.chilkat.io",80,0,0);
$ws->UseConnection($rest);
$ws->AddClientHeaders();
$responseBodyIgnored = $rest->fullRequestNoBody("GET","/wsChilkatEcho.ashx");
$success = $ws->ValidateServerHandshake();
if ($success != 1) {
    print $ws->lastErrorText() . "\r\n";
    exit;
}

# This example demonstrates sending a frame and receiving a text frame.

# Send a frame containing the string "Hello World!"
# This will be the first and final frame, and therefore this constitutes the entire message.
$finalFrame = 1;
$success = $ws->SendFrame("Hello World!",$finalFrame);
if ($success != 1) {
    print $ws->lastErrorText() . "\r\n";
    exit;
}

# Read an incoming frame.
$success = $ws->ReadFrame();
if ($success != 1) {
    print "Failed to receive a frame" . "\r\n";
    print "ReadFrame fail reason = " . $ws->get_ReadFrameFailReason() . "\r\n";
    print $ws->lastErrorText() . "\r\n";
    exit;
}

# Show the string that was received.
$receivedStr = $ws->getFrameData();
print "Received: " . $receivedStr . "\r\n";

# Close the websocket connection.
$success = $ws->SendClose(1,1000,"Closing this websocket.");
if ($success != 1) {
    print $ws->lastErrorText() . "\r\n";
    exit;
}

# Read the Close response.
$success = $ws->ReadFrame();
if ($success != 1) {
    print "ReadFrame fail reason = " . $ws->get_ReadFrameFailReason() . "\r\n";
    print $ws->lastErrorText() . "\r\n";
    exit;
}

# Should receive the "Close" opcode.
print "Received opcode: " . $ws->frameOpcode() . "\r\n";
# Should be the same status code we sent (1000)
print "Received close status code: " . $ws->get_CloseStatusCode() . "\r\n";
# The server may echo the close reason.  If not, this will be empty.
print "Echoed close reason: " . $ws->closeReason() . "\r\n";

print "Success." . "\r\n";