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<?php |
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/** |
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* UriDetector.php - Jaxon request UriDetector detector |
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* |
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* Detect and parse the URI of the Jaxon request being processed. |
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* |
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* @package jaxon-utils |
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* @author Thierry Feuzeu <[email protected]> |
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* @copyright 2022 Thierry Feuzeu <[email protected]> |
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* @license https://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License |
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* @link https://github.com/jaxon-php/jaxon-core |
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*/ |
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namespace Jaxon\Utils\Http; |
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use function basename; |
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use function explode; |
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use function implode; |
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use function parse_str; |
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use function parse_url; |
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use function rawurlencode; |
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use function str_replace; |
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use function strlen; |
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use function strpos; |
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use function strrpos; |
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use function strtolower; |
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use function substr; |
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class UriDetector |
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{ |
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/** |
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* The URL components |
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* |
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* @var array |
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*/ |
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protected $aUrl; |
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/** |
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* @param array $aServerParams The server environment variables |
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* |
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* @return void |
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*/ |
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private function setScheme(array $aServerParams): void |
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{ |
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if(isset($this->aUrl['scheme'])) |
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{ |
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return; |
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} |
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if(isset($aServerParams['HTTP_SCHEME'])) |
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{ |
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$this->aUrl['scheme'] = $aServerParams['HTTP_SCHEME']; |
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return; |
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} |
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if((isset($aServerParams['HTTPS']) && strtolower($aServerParams['HTTPS']) === 'on') || |
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(isset($aServerParams['HTTP_X_FORWARDED_SSL']) && $aServerParams['HTTP_X_FORWARDED_SSL'] === 'on') || |
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(isset($aServerParams['HTTP_X_FORWARDED_PROTO']) && $aServerParams['HTTP_X_FORWARDED_PROTO'] === 'https')) |
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{ |
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$this->aUrl['scheme'] = 'https'; |
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return; |
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} |
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$this->aUrl['scheme'] = 'http'; |
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} |
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/** |
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* Get the URL from the $aServerParams var |
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* |
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* @param array $aServerParams The server environment variables |
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* @param string $sKey The key in the $aServerParams array |
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* |
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* @return void |
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*/ |
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private function setHostFromServer(array $aServerParams, string $sKey): void |
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{ |
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if(isset($this->aUrl['host']) || empty($aServerParams[$sKey])) |
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{ |
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return; |
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} |
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if(strpos($aServerParams[$sKey], ':') === false) |
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{ |
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$this->aUrl['host'] = $aServerParams[$sKey]; |
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return; |
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} |
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list($this->aUrl['host'], $this->aUrl['port']) = explode(':', $aServerParams[$sKey]); |
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} |
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/** |
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* @param array $aServerParams The server environment variables |
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* |
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* @return void |
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* @throws UriException |
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*/ |
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private function setHost(array $aServerParams): void |
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{ |
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$this->setHostFromServer($aServerParams, 'HTTP_X_FORWARDED_HOST'); |
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$this->setHostFromServer($aServerParams, 'HTTP_HOST'); |
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$this->setHostFromServer($aServerParams, 'SERVER_NAME'); |
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if(empty($this->aUrl['host'])) |
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{ |
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throw new UriException(); |
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} |
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if(empty($this->aUrl['port']) && isset($aServerParams['SERVER_PORT'])) |
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{ |
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$this->aUrl['port'] = $aServerParams['SERVER_PORT']; |
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} |
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} |
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/** |
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* @param array $aServerParams The server environment variables |
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* |
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* @return void |
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*/ |
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private function setPath(array $aServerParams): void |
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{ |
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if(isset($this->aUrl['path']) && strlen(basename($this->aUrl['path'])) === 0) |
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{ |
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unset($this->aUrl['path']); |
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} |
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if(isset($this->aUrl['path'])) |
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{ |
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return; |
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} |
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$aPath = parse_url($aServerParams['PATH_INFO'] ?? ($aServerParams['PHP_SELF'] ?? '')); |
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if(isset($aPath['path'])) |
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{ |
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$this->aUrl['path'] = $aPath['path']; |
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} |
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} |
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/** |
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* @return string |
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*/ |
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private function getPath(): string |
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{ |
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return '/' . ltrim($this->aUrl['path'], '/'); |
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} |
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/** |
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* @return string |
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*/ |
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private function getUser(): string |
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{ |
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if(empty($this->aUrl['user'])) |
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{ |
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return ''; |
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} |
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$sUrl = $this->aUrl['user']; |
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if(isset($this->aUrl['pass'])) |
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{ |
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$sUrl .= ':' . $this->aUrl['pass']; |
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} |
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return $sUrl . '@'; |
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} |
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/** |
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* @return string |
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*/ |
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private function getPort(): string |
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{ |
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if(isset($this->aUrl['port']) && |
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(($this->aUrl['scheme'] === 'http' && $this->aUrl['port'] != 80) || |
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($this->aUrl['scheme'] === 'https' && $this->aUrl['port'] != 443))) |
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{ |
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return ':' . $this->aUrl['port']; |
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} |
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return ''; |
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} |
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/** |
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* @param array $aServerParams The server environment variables |
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* |
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* @return void |
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*/ |
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private function setQuery(array $aServerParams): void |
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{ |
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if(empty($this->aUrl['query'])) |
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{ |
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$this->aUrl['query'] = $aServerParams['QUERY_STRING'] ?? ''; |
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} |
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} |
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/** |
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* @return string |
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*/ |
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private function getQuery(): string |
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{ |
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if(empty($this->aUrl['query'])) |
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{ |
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return ''; |
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} |
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$aQueries = explode('&', $this->aUrl['query']); |
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foreach($aQueries as $sKey => $sQuery) |
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{ |
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if(substr($sQuery, 0, 11) === 'jxnGenerate') |
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{ |
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unset($aQueries[$sKey]); |
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} |
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} |
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if(empty($aQueries)) |
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{ |
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return ''; |
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} |
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return '?' . implode("&", $aQueries); |
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} |
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/** |
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* Detect the URI of the current request |
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* |
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* @param array $aServerParams The server environment variables |
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* |
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* @return string |
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* @throws UriException |
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*/ |
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public function detect(array $aServerParams): string |
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{ |
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$this->aUrl = []; |
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// Try to get the request URL |
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if(isset($aServerParams['REQUEST_URI'])) |
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{ |
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$this->aUrl = parse_url($aServerParams['REQUEST_URI']); |
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} |
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// Fill in the empty values |
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$this->setScheme($aServerParams); |
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$this->setHost($aServerParams); |
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$this->setPath($aServerParams); |
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$this->setQuery($aServerParams); |
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// Build the URL: Start with scheme, user and pass |
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return $this->aUrl['scheme'] . '://' . $this->getUser() . $this->aUrl['host'] . |
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$this->getPort() . str_replace(['"', "'", '<', '>'], |
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['%22', '%27', '%3C', '%3E'], $this->getPath() . $this->getQuery()); |
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} |
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/** |
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* @param string $sQueryPart |
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* @param string $sKey |
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* @param string $sValue |
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* |
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* @return string |
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*/ |
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private function makeQueryPart(string $sQueryPart, string $sKey, string $sValue): string |
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{ |
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return $sValue === '' && strpos($sQueryPart, "$sKey=") === false ? |
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rawurlencode($sKey) : rawurlencode($sKey) . '=' . rawurlencode($sValue); |
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} |
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/** |
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* @param string $sQueryPart |
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* @param array $aServerParams |
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* |
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* @return string |
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*/ |
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private function parseQueryPart(string $sQueryPart, array $aServerParams): string |
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{ |
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$aQueryParts = []; |
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parse_str($sQueryPart, $aQueryParts); |
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if(empty($aQueryParts)) |
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{ |
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// Couldn't break up the query, but there's one there. |
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// Possibly "http://url/page.html?query1234" type of query? |
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// Try to get data from the server environment var. |
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parse_str($aServerParams['QUERY_STRING'] ?? '', $aQueryParts); |
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} |
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if(($aQueryParts)) |
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{ |
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$aNewQueryParts = []; |
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foreach($aQueryParts as $sKey => $sValue) |
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{ |
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$aNewQueryParts[] = $this->makeQueryPart($sQueryPart, $sKey, $sValue); |
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} |
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return '?' . implode('&', $aNewQueryParts); |
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} |
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return trim($sQueryPart); |
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} |
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/** |
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* Make the specified URL suitable for redirect |
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* |
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* @param string $sURL The relative or fully qualified URL |
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* @param array $aServerParams The server environment variables |
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* |
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* @return string |
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*/ |
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public function redirect(string $sURL, array $aServerParams): string |
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{ |
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// We need to parse the query part so that the values are rawurlencode()'ed. |
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// Can't just use parse_url() cos we could be dealing with a relative URL which parse_url() can't deal with. |
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$sURL = trim($sURL); |
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$nQueryStart = strpos($sURL, '?', strrpos($sURL, '/')); |
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if($nQueryStart === false) |
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{ |
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return $sURL; |
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} |
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$nQueryStart++; |
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$nQueryEnd = strpos($sURL, '#', $nQueryStart); |
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if($nQueryEnd === false) |
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{ |
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$nQueryEnd = strlen($sURL); |
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} |
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$sQueryPart = substr($sURL, $nQueryStart, $nQueryEnd - $nQueryStart); |
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return str_replace('?' . $sQueryPart, $this->parseQueryPart($sQueryPart, $aServerParams), $sURL); |
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} |
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} |
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