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ProxyHeaders.php
82 lines
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Matomo - free/libre analytics platform |
| 5 | * |
| 6 | * @link https://matomo.org |
| 7 | * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later |
| 8 | */ |
| 9 | namespace Piwik; |
| 10 | |
| 11 | /** |
| 12 | * Proxy headers |
| 13 | * |
| 14 | */ |
| 15 | class ProxyHeaders |
| 16 | { |
| 17 | /** |
| 18 | * Get protocol information, with the exception of HTTPS |
| 19 | * |
| 20 | * @return ?string protocol information |
| 21 | */ |
| 22 | public static function getProtocolInformation() : ?string |
| 23 | { |
| 24 | if (isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == 443) { |
| 25 | return 'SERVER_PORT=443'; |
| 26 | } |
| 27 | if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https') { |
| 28 | return 'X-Forwarded-Proto'; |
| 29 | } |
| 30 | if (isset($_SERVER['HTTP_X_FORWARDED_SCHEME']) && strtolower($_SERVER['HTTP_X_FORWARDED_SCHEME']) == 'https') { |
| 31 | return 'X-Forwarded-Scheme'; |
| 32 | } |
| 33 | if (isset($_SERVER['HTTP_X_URL_SCHEME']) && strtolower($_SERVER['HTTP_X_URL_SCHEME']) == 'https') { |
| 34 | return 'X-Url-Scheme'; |
| 35 | } |
| 36 | return null; |
| 37 | } |
| 38 | /** |
| 39 | * Get headers present in the HTTP request |
| 40 | * |
| 41 | * @param string[] $recognizedHeaders |
| 42 | * @return string[] HTTP headers |
| 43 | */ |
| 44 | private static function getHeaders(array $recognizedHeaders) : array |
| 45 | { |
| 46 | $headers = []; |
| 47 | foreach ($recognizedHeaders as $header) { |
| 48 | if (isset($_SERVER[$header])) { |
| 49 | $headers[] = $header; |
| 50 | } |
| 51 | } |
| 52 | return $headers; |
| 53 | } |
| 54 | /** |
| 55 | * Detect proxy client headers |
| 56 | * |
| 57 | * @return string[] Proxy client HTTP headers |
| 58 | */ |
| 59 | public static function getProxyClientHeaders() : array |
| 60 | { |
| 61 | return self::getHeaders(['HTTP_CF_CONNECTING_IP', 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR']); |
| 62 | } |
| 63 | /** |
| 64 | * Detect proxy host headers |
| 65 | * |
| 66 | * @return string[] Proxy host HTTP headers |
| 67 | */ |
| 68 | public static function getProxyHostHeaders() : array |
| 69 | { |
| 70 | return self::getHeaders(['HTTP_X_FORWARDED_HOST']); |
| 71 | } |
| 72 | /** |
| 73 | * Detect proxy scheme headers |
| 74 | * |
| 75 | * @return string[] Proxy scheme HTTP headers |
| 76 | */ |
| 77 | public static function getProxySchemeHeaders() : array |
| 78 | { |
| 79 | return self::getHeaders(['HTTP_X_FORWARDED_PROTO', 'HTTP_X_FORWARDED_SCHEME', 'HTTP_X_URL_SCHEME']); |
| 80 | } |
| 81 | } |
| 82 |