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(PHP ActiveX) Send and Receive WebSocket MessagesThis example how to send and receive websocket messages. A WebSocket message can be composed of one or more frames. The simple case is where a single frame is both the first and last frame in a message. This is the case where the 1st frame in the message has the "final frame" bit set. This example demonstrates sending and receiving multi-frame messages.
Note: The websockets.chilkat.io server imposes the following limitations:
<?php // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.WebSocket') $ws = new COM("Chilkat.WebSocket"); // 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. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rest') $rest = new COM("Chilkat.Rest"); // 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 . "\n"; exit; } // This example demonstrates sending and receiving a multi-frame message. // The websocket message will be composed of three text lines, each frame will contain a single line. // Send the 1st frame in the message. $finalFrame = 0; $success = $ws->SendFrame('This is the 1st frame\r\n',$finalFrame); if ($success != 1) { print $ws->LastErrorText . "\n"; exit; } // Send the 2nd frame in the message. $success = $ws->SendFrame('This is the 2nd frame\r\n',$finalFrame); if ($success != 1) { print $ws->LastErrorText . "\n"; exit; } // Send the 3rd and final frame in the message. $finalFrame = 1; $success = $ws->SendFrame('This is the 3rd frame\r\n',$finalFrame); if ($success != 1) { print $ws->LastErrorText . "\n"; exit; } // Read an incoming frames until we receive the final frame. // Note: It may be that the echo server (websockets.chilkat.io) responds with // the full message in a single final frame. $receivedFinalFrame = 0; while ($receivedFinalFrame == 0) { $success = $ws->ReadFrame(); if ($success != 1) { print 'Failed to receive a frame' . "\n"; print 'ReadFrame fail reason = ' . $ws->ReadFrameFailReason . "\n"; print $ws->LastErrorText . "\n"; exit; } $receivedFinalFrame = $ws->FinalFrame; // Show the opcode and final frame bit for the frame just received: print 'Frame opcode: ' . $ws->FrameOpcode . "\n"; print 'Final frame: ' . $receivedFinalFrame . "\n"; } // Return the message accumulated in the above calls to ReadFrame. $receivedMsg = $ws->getFrameData(); print 'Received: ' . $receivedMsg . "\n"; // Close the websocket connection. $success = $ws->SendClose(1,1000,'Closing this websocket.'); if ($success != 1) { print $ws->LastErrorText . "\n"; exit; } // Read the Close response. $success = $ws->ReadFrame(); if ($success != 1) { print 'ReadFrame fail reason = ' . $ws->ReadFrameFailReason . "\n"; print $ws->LastErrorText . "\n"; exit; } // Should receive the "Close" opcode. print 'Received opcode: ' . $ws->FrameOpcode . "\n"; // Should be the same status code we sent (1000) print 'Received close status code: ' . $ws->CloseStatusCode . "\n"; // The server may echo the close reason. If not, this will be empty. print 'Echoed close reason: ' . $ws->CloseReason . "\n"; print 'Success.' . "\n"; ?> |
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