CDP in PHP

cdp.script.php

<?php

use io\{File, Files};
use lang\Value;
use peer\http\HttpConnection;
use text\json\{Json, StreamInput};
use util\Comparison;
use util\cmd\Console;
use websocket\WebSocket;

/** @see https://chromedevtools.github.io/devtools-protocol/tot/ */
class CDP implements Value {
  use Comparison;

  private $ws;
  private $id= 0;

  public function __construct($url) {
    $this->ws= new WebSocket($url);
    $this->ws->connect();
  }

  public function send($method, $params= null) {
    $payload= ['id' => ++$this->id, 'method' => $method];
    isset($params) && $payload['params']= $params;
    $this->ws->send(Json::of($payload));
    return $this->id;
  }

  public function receive() {
    return Json::read($this->ws->receive());
  }

  public function close() {
    $this->ws->close();
  }

  public function toString() {
    return nameof($this).'(->'.$this->ws->socket()->toString().$this->ws->path().')';
  }  
}

// Fetch list of open tabs
$response= (new HttpConnection('http://localhost:9222/json'))->get();
$tabs= Json::read($response->readData($response->header('Content-Length')[0]));

$target= null;
foreach ($tabs as $tab) {
  if ('edge://newtab/' === $tab['url']) $target= $tab;
}

if (empty($target)) {
  Console::$err->writeLine('No active tab in ', $tabs);
  return 1;
}

// Connect to CDP websocket
$cdp= new CDP($target['webSocketDebuggerUrl']);
Console::writeLine($cdp);

$cdp->send('Page.enable');
$cdp->send('Page.navigate', ['url' => $argv[1]]);

do {
  $answer= $cdp->receive();
  if ('Page.frameStoppedLoading' === ($answer['method'] ?? null)) {
    Console::writeLine($answer);
    break;
  }

  Console::writeLine($answer);
} while ($answer);

$dom= $cdp->send('Runtime.evaluate', [
  'expression'    => 'document.body.outerHTML',
  'returnByValue' => true,
]);
do {
  $answer= $cdp->receive();
  if ($dom === ($answer['id'] ?? null)) {
    Console::writeLine($answer['result']);
    break;
  }

  Console::writeLine($answer);
} while ($answer);

// $screenshot= $cdp->send('Page.captureScreenshot', [
//   'format'                => 'png',
//   'fromSurface'           => true,
//   'captureBeyondViewport' => true,
// ]);

// do {
//   $answer= $cdp->receive();
//   if ($screenshot === ($answer['id'] ?? null)) {
//     Files::write(new File('screenshot.png'), base64_decode($answer['result']['data']));
//     break;
//   }

//   Console::writeLine($answer);
// } while ($answer);

$cdp->close();

$ '/cygdrive/c/Program Files (x86)/Microsoft/Edge Dev/Application/msedge.exe' --remote-debugging-port=9222 &