Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
0.00% |
0 / 76 |
|
0.00% |
0 / 1 |
CRAP | |
0.00% |
0 / 1 |
| CurlTransport | |
0.00% |
0 / 76 |
|
0.00% |
0 / 1 |
210 | |
0.00% |
0 / 1 |
| send | |
0.00% |
0 / 76 |
|
0.00% |
0 / 1 |
210 | |||
| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\ResourceLoader\Transport; |
| 6 | |
| 7 | use Phpdftk\ResourceLoader\Exception\FetchFailedException; |
| 8 | |
| 9 | /** |
| 10 | * curl-based HTTP transport. Single-shot per call — caller chains |
| 11 | * redirects + handles cap enforcement. |
| 12 | * |
| 13 | * Each call constructs a fresh curl handle so requests don't share |
| 14 | * state. cookies, sessions, keep-alive — none of these are wanted |
| 15 | * for a one-shot resource fetcher. |
| 16 | */ |
| 17 | final class CurlTransport implements TransportInterface |
| 18 | { |
| 19 | public function send( |
| 20 | string $url, |
| 21 | array $headers, |
| 22 | int $timeoutSeconds, |
| 23 | int $maxBodyBytes, |
| 24 | ): RawResponse { |
| 25 | if (!function_exists('curl_init')) { |
| 26 | throw new FetchFailedException('ext-curl is not loaded; CurlTransport cannot run.'); |
| 27 | } |
| 28 | |
| 29 | $handle = curl_init(); |
| 30 | if ($handle === false) { |
| 31 | throw new FetchFailedException('curl_init() returned false.'); |
| 32 | } |
| 33 | |
| 34 | $headerLines = []; |
| 35 | foreach ($headers as $name => $value) { |
| 36 | $headerLines[] = $name . ': ' . $value; |
| 37 | } |
| 38 | |
| 39 | // Response header collector. Curl calls this once per |
| 40 | // header line including blank separators between |
| 41 | // header blocks (which we ignore). |
| 42 | $responseHeaders = []; |
| 43 | $headerCallback = static function ($ch, string $line) use (&$responseHeaders): int { |
| 44 | unset($ch); |
| 45 | $colon = strpos($line, ':'); |
| 46 | if ($colon !== false) { |
| 47 | $name = strtolower(trim(substr($line, 0, $colon))); |
| 48 | $value = trim(substr($line, $colon + 1)); |
| 49 | if ($name !== '') { |
| 50 | $responseHeaders[$name] = $value; |
| 51 | } |
| 52 | } |
| 53 | return strlen($line); |
| 54 | }; |
| 55 | |
| 56 | // Body collector with size cap. Returning less than the |
| 57 | // received chunk size signals curl to abort. |
| 58 | $bodyBuffer = ''; |
| 59 | $bodyOverflowed = false; |
| 60 | $writeCallback = static function ($ch, string $chunk) use (&$bodyBuffer, &$bodyOverflowed, $maxBodyBytes): int { |
| 61 | unset($ch); |
| 62 | $chunkLen = strlen($chunk); |
| 63 | $remaining = $maxBodyBytes - strlen($bodyBuffer); |
| 64 | if ($remaining <= 0) { |
| 65 | $bodyOverflowed = true; |
| 66 | return 0; |
| 67 | } |
| 68 | if ($chunkLen > $remaining) { |
| 69 | $bodyBuffer .= substr($chunk, 0, $remaining); |
| 70 | $bodyOverflowed = true; |
| 71 | return $remaining; |
| 72 | } |
| 73 | $bodyBuffer .= $chunk; |
| 74 | return $chunkLen; |
| 75 | }; |
| 76 | |
| 77 | curl_setopt_array($handle, [ |
| 78 | CURLOPT_URL => $url, |
| 79 | CURLOPT_CONNECTTIMEOUT => $timeoutSeconds, |
| 80 | CURLOPT_TIMEOUT => $timeoutSeconds, |
| 81 | // We do redirect handling ourselves so the fetcher can |
| 82 | // re-check SSRF + strip Authorization across hops. |
| 83 | CURLOPT_FOLLOWLOCATION => false, |
| 84 | // Defensive defaults — no auto-decoding (we want raw |
| 85 | // bytes for image sniffing), no compression unless the |
| 86 | // server explicitly negotiates it via Accept-Encoding. |
| 87 | CURLOPT_HTTPHEADER => $headerLines, |
| 88 | CURLOPT_HEADERFUNCTION => $headerCallback, |
| 89 | CURLOPT_WRITEFUNCTION => $writeCallback, |
| 90 | CURLOPT_FAILONERROR => false, |
| 91 | CURLOPT_SSL_VERIFYPEER => true, |
| 92 | CURLOPT_SSL_VERIFYHOST => 2, |
| 93 | CURLOPT_PROTOCOLS => CURLPROTO_HTTP | CURLPROTO_HTTPS, |
| 94 | CURLOPT_REDIR_PROTOCOLS => CURLPROTO_HTTP | CURLPROTO_HTTPS, |
| 95 | ]); |
| 96 | |
| 97 | $success = curl_exec($handle); |
| 98 | if ($success === false && !$bodyOverflowed) { |
| 99 | $errno = curl_errno($handle); |
| 100 | $error = curl_error($handle); |
| 101 | curl_close($handle); |
| 102 | throw new FetchFailedException(sprintf( |
| 103 | 'HTTP fetch failed (curl errno %d): %s — %s', |
| 104 | $errno, |
| 105 | $error, |
| 106 | $url, |
| 107 | )); |
| 108 | } |
| 109 | $statusCode = curl_getinfo($handle, CURLINFO_RESPONSE_CODE); |
| 110 | curl_close($handle); |
| 111 | |
| 112 | if (!is_int($statusCode) || $statusCode === 0) { |
| 113 | throw new FetchFailedException(sprintf('HTTP fetch did not return a status code: %s', $url)); |
| 114 | } |
| 115 | |
| 116 | if ($bodyOverflowed && strlen($bodyBuffer) >= $maxBodyBytes) { |
| 117 | throw new FetchFailedException(sprintf( |
| 118 | 'Response body exceeds the %d-byte limit: %s', |
| 119 | $maxBodyBytes, |
| 120 | $url, |
| 121 | )); |
| 122 | } |
| 123 | |
| 124 | return new RawResponse( |
| 125 | statusCode: $statusCode, |
| 126 | headers: $responseHeaders, |
| 127 | body: $bodyBuffer, |
| 128 | finalUrl: $url, |
| 129 | ); |
| 130 | } |
| 131 | } |