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<?php |
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namespace Zaphpa; |
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/** |
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* HTTP Request class |
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*/ |
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class Request { |
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public $params; |
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public $data; |
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public $format; |
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public $accepted_formats; |
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public $encodings; |
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public $charsets; |
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public $languages; |
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public $version; |
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public $method; |
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public $clientIP; |
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public $userAgent; |
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public $protocol; |
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function __construct() { |
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$this->method = Router::getRequestMethod(); |
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$this->grabRequestMetadata(); |
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// Caution: this piece of code assumes that both $_GET and $_POST are empty arrays when the request type is not GET or POST |
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// This is true for current versions of PHP, but it is PHP so it's subject to change |
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switch ($this->method) { |
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case "GET": |
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$this->data = $_GET; |
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break; |
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default: |
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$contents = file_get_contents('php://input'); |
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$parsed_contents = null; |
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// @TODO: considering $_SERVER['HTTP_CONTENT_TYPE'] == 'application/x-www-form-urlencoded' could help here |
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parse_str($contents, $parsed_contents); |
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$this->data = $_GET + $_POST + $parsed_contents; // people do use query params with POST, PUT, and DELETE |
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$this->data['_RAW_HTTP_DATA'] = $contents; |
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} |
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} |
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protected function grabRequestMetadata() { |
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$this->clientIP = !empty($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : ''; |
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$this->clientIP = (empty($this->clientIP) && !empty($_SERVER['REMOTE_ADDR'])) ? $_SERVER['REMOTE_ADDR'] : ''; |
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$this->userAgent = empty($_SERVER['HTTP_USER_AGENT']) ? '' : $_SERVER['HTTP_USER_AGENT']; |
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$this->protocol = !empty($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : null; |
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$this->parse_special('encodings', 'HTTP_ACCEPT_ENCODING', array('utf-8')); |
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$this->parse_special('charsets', 'HTTP_ACCEPT_CHARSET', array('text/html')); |
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$this->parse_special('accepted_formats', 'HTTP_ACCEPT'); |
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$this->parse_special('languages', 'HTTP_ACCEPT_LANGUAGE', array('en-US')); |
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} |
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/** |
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* Requested output format, if any. |
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* Format in the URL request string takes priority over the one in HTTP headers, defaults to HTML. |
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*/ |
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protected function contentNego() { |
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if (!empty($this->data['format'])) { |
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$this->format = $this->data['format']; |
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$aliases = $this->common_aliases(); |
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if (array_key_exists($this->format, $aliases)) { |
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$this->format = $aliases[$this->format]; |
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} |
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unset($this->data['format']); |
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} elseif (!empty($this->accepted_formats[0])) { |
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$this->format = $this->accepted_formats[0]; |
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unset ($this->data['format']); |
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} |
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} |
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/** |
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* Covenience method that checks is data item is empty to avoid notice-level warnings |
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* |
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* @param $idx |
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* name o the data variable (either request var or HTTP body var). |
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*/ |
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public function get_var($idx) { |
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return (is_array($this->data) && isset($this->data[$idx])) ? $this->data[$idx] : null; |
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} |
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/** |
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* Subclass this function if you need a different set! |
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*/ |
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public function common_aliases() { |
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return array( |
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'html' => 'text/html', |
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'txt' => 'text/plain', |
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'css' => 'text/css', |
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'js' => 'application/x-javascript', |
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'xml' => 'application/xml', |
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'rss' => 'application/rss+xml', |
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'atom' => 'application/atom+xml', |
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'json' => 'application/json', |
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'jsonp' => 'text/javascript', |
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); |
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} |
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/** |
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* Parses some packed $_SERVER variables (e.g. 'encoding', 'charsets' etc.) into more useful arrays. |
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* |
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* @param string $varname - alias under which the variable will be |
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* attached to the current Request object |
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* @param string $argname - the name of the argument in $_SERVER |
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*/ |
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private function parse_special($varname, $argname, $default=array()) { |
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$this->$varname = $default; |
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if (!empty($_SERVER[$argname])) { |
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// parse before the first ";" character |
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$truncated = substr($_SERVER[$argname], 0, strpos($_SERVER[$argname], ";", 0)); |
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$truncated = !empty($truncated) ? $truncated : $_SERVER[$argname]; |
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$this->$varname = explode(",", $truncated); |
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} |
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} |
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} // end Request |
zaphpa /
zaphpa
