Файл: vendor/guzzlehttp/psr7/src/Rfc7230.php
Строк: 77
<?php
declare(strict_types=1);
namespace GuzzleHttpPsr7;
/**
* @internal
*/
final class Rfc7230
{
/**
* Header related regular expressions (based on amphp/http package)
*
* Note: header delimiter (rn) is modified to r?n to accept line feed only delimiters for BC reasons.
*
* @see https://github.com/amphp/http/blob/v1.0.1/src/Rfc7230.php#L12-L15
*
* @license https://github.com/amphp/http/blob/v1.0.1/LICENSE
*/
public const HEADER_REGEX = "(^([^()<>@,;:\"/[]?={}x01-x20x7F]++):[ t]*+((?:[ t]*+[x21-x7Ex80-xFF]++)*+)[ t]*+r?n)m";
public const HEADER_FOLD_REGEX = "(r?n[ t]++)";
/**
* @return array{0: string, 1: int|null}|null
*/
public static function parseHostHeader(string $authority): ?array
{
if ($authority === '') {
return null;
}
$host = $authority;
$port = null;
if ($authority[0] === '[') {
$closingBracket = strpos($authority, ']');
if ($closingBracket === false) {
return null;
}
$host = substr($authority, 0, $closingBracket + 1);
$remainder = substr($authority, $closingBracket + 1);
if ($remainder !== '') {
if ($remainder[0] !== ':') {
return null;
}
$port = self::parseAuthorityPort(substr($remainder, 1));
if ($port === null) {
return null;
}
}
} elseif (false !== ($colon = strpos($authority, ':'))) {
$host = substr($authority, 0, $colon);
$port = self::parseAuthorityPort(substr($authority, $colon + 1));
if ($port === null) {
return null;
}
}
if ($host === '' || !self::isValidHostHeaderHost($host)) {
return null;
}
return [$host, $port];
}
private static function isValidHostHeaderHost(string $host): bool
{
if (preg_match('/[x00-x20x7F/?#@\\]/', $host)) {
return false;
}
if (strpos($host, '[') !== false || strpos($host, ']') !== false) {
if ($host[0] !== '[' || substr($host, -1) !== ']') {
return false;
}
$address = substr($host, 1, -1);
return filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== false
|| preg_match('/^v[0-9a-f]+.['.Rfc3986::CHAR_UNRESERVED.Rfc3986::CHAR_SUB_DELIMS.':]+$/iD', $address) === 1;
}
return strpos($host, ':') === false;
}
private static function parseAuthorityPort(string $port): ?int
{
if ($port === '' || !ctype_digit($port)) {
return null;
}
$normalized = ltrim($port, '0');
if ($normalized === '') {
return 0;
}
if (strlen($normalized) > 5 || (int) $normalized > 0xFFFF) {
return null;
}
return (int) $normalized;
}
}