<?php
$url = $argv[1] ?? 'http://127.0.0.1:8080/headers';

$ch = curl_init($url);
if ($ch === false) {
    fwrite(STDERR, "Could not initialize cURL.\n");
    exit(1);
}

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HEADER => true,
    CURLOPT_TIMEOUT => 10,
    CURLOPT_HTTPHEADER => [
        'Accept: application/json',
    ],
]);

$response = curl_exec($ch);
if ($response === false) {
    $errno = curl_errno($ch);
    $error = curl_error($ch);
    curl_close($ch);

    echo "cURL error {$errno}: {$error}" . PHP_EOL;
    exit(1);
}

$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
curl_close($ch);

$headerText = substr($response, 0, $headerSize);
$body = substr($response, $headerSize);

echo "HTTP status: {$status}" . PHP_EOL;
echo "Header bytes: {$headerSize}" . PHP_EOL;
echo "Response headers:" . PHP_EOL;
echo trim($headerText) . PHP_EOL;
echo "Response body:" . PHP_EOL;
echo trim($body) . PHP_EOL;