Code snippets for Minsk PHP Night presentation: Headless browsers and friends

chrome-headless-via-web-sockets.php

<?php

// Adapted from: https://github.com/ratchetphp/Pawl

require __DIR__ . '/vendor/autoload.php';

$loop = React\EventLoop\Factory::create();
$connector = new Ratchet\Client\Connector($loop);

// For example: ws://127.0.0.1:9222/devtools/page/6c98af2a-8944-4742-91d3-154cbd873ce2
$webSocketUrl = json_decode(`curl 127.0.0.1:9222/json`, true)[0]['webSocketDebuggerUrl'];

$connector($webSocketUrl, [], ['Origin' => 'http://localhost'])
    ->then(function(Ratchet\Client\WebSocket $conn) {
        $conn->on('message', function(\Ratchet\RFC6455\Messaging\MessageInterface $msg) use ($conn) {
            echo "Received: {$msg}\n";
            if (strpos($msg, '{"method":"Network.loadingFinished"') === 0) {
                $conn->close();
            }
        });

        $conn->on('close', function($code = null, $reason = null) {
            echo "Connection closed ({$code} - {$reason})\n";
        });

        $conn->send(json_encode(['id' => 1, 'method' => 'Network.enable']));
        $conn->send(json_encode(['id' => 2, 'method' => 'Page.navigate', 'params' => ['url' => 'http://eventspace.by/']]));

    }, function(\Exception $e) use ($loop) {
        echo "Could not connect: {$e->getMessage()}\n";
        $loop->stop();
    });

$loop->run();

ping-to-slack.php

<?php
$data = file_get_contents("http://eventspace.by");

// Expected and unexpected phrases
$success = preg_match("/.+объединяющая.+/", $data)
    && !preg_match("/.+Warning.+/", $data);

// Formatting output for Slack
$emoji = $success ? ':white_check_mark:' : ':volcano:';
$status = $success ? 'OK' : 'Failed';

// Use value from Slack -> Custom Integrations -> Incoming WebHooks -> Configuration
$webHookUrl = 'https://hooks.slack.com/services/AAAAAAAAA/BBBBBBBBB/CCCCCCCCCCCCCCCCCCCCCCCC';
$json = json_encode([
    'text' => "$emoji $status",
    'username' => 'php-status-bot',
]);

// PHP streams magic to simulate POST request
$opts = ['http' => [
    'method' => 'POST',
    'header' => "Content-type: application/json",
    'content' => $json]
];
$context = stream_context_create($opts);

// Sending to Slack WebHooks
$response = file_get_contents($webHookUrl, false, $context);

// Example output: Website: OK Sent to slack: ok
echo "WebSite: $status Sent to slack: $response";