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<?php
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/*
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* This file is a part of PHPAX-RS framework, released under terms of GPL-3.0
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* licence. Copyright (c) 2014, UnArt Slavičín, o.s. All rights reserved.
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*/
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namespace phpaxrs\common;
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/**
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* The "HttpUtil" class that cotain utility methods related to HTTP.
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*
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* @author Ondřej Fibich <ondrej.fibich@gmail.com>
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*/
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class HttpUtil {
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/**
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* List of all HTTP status messages.
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*
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* @var Array
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*/
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private static $messages = array(
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// Informational 1xx
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100 => 'Continue',
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101 => 'Switching Protocols',
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// Success 2xx
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200 => 'OK',
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201 => 'Created',
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202 => 'Accepted',
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203 => 'Non-Authoritative Information',
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204 => 'No Content',
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205 => 'Reset Content',
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206 => 'Partial Content',
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// Redirection 3xx
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300 => 'Multiple Choices',
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301 => 'Moved Permanently',
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302 => 'Found', // 1.1
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303 => 'See Other',
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304 => 'Not Modified',
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305 => 'Use Proxy',
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// 306 is deprecated but reserved
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307 => 'Temporary Redirect',
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// Client Error 4xx
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400 => 'Bad Request',
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401 => 'Unauthorized',
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402 => 'Payment Required',
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403 => 'Forbidden',
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404 => 'Not Found',
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405 => 'Method Not Allowed',
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406 => 'Not Acceptable',
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407 => 'Proxy Authentication Required',
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408 => 'Request Timeout',
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409 => 'Conflict',
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410 => 'Gone',
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411 => 'Length Required',
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412 => 'Precondition Failed',
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413 => 'Request Entity Too Large',
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414 => 'Request-URI Too Long',
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415 => 'Unsupported Media Type',
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416 => 'Requested Range Not Satisfiable',
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417 => 'Expectation Failed',
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// Server Error 5xx
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500 => 'Internal Server Error',
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501 => 'Not Implemented',
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502 => 'Bad Gateway',
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503 => 'Service Unavailable',
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504 => 'Gateway Timeout',
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505 => 'HTTP Version Not Supported',
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509 => 'Bandwidth Limit Exceeded'
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);
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/**
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* Gets message for the given HTTP status code.
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*
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* @param int $status
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* @return null|string
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*/
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public function status_message($status) {
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if (array_key_exists($status, self::$messages)) {
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return self::$messages[$status];
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}
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return NULL;
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}
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/**
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* Parses HTTP accept header and returned ordered by height.
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*
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* @param string $accepts HTTP accept header string
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* @return array array of MIME types
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*/
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public static function parse_accept_header($accepts) {
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if (empty($accepts)) {
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return array();
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}
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// parse parts of accepts
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$accepts_parts = array_map('trim', explode(',', $accepts));
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$accepts_parsed = array();
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// parse
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foreach ($accepts_parts as $accepts_part) {
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$subparts = array_map('trim', explode(';', $accepts_part));
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$weight = 1.0;
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if (count($subparts) > 1 && strncmp($subparts[1], 'q=', 2) == 0) {
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$weight = floatval(substr($subparts[1], 2));
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}
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$accepts_parsed[$subparts[0]] = $weight;
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}
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// sort by weight (we need stable algorithm!)
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array_multisort($accepts_parsed, SORT_DESC, SORT_NUMERIC,
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range(1, count($accepts_parsed)), SORT_ASC, SORT_NUMERIC);
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// return sorted accepts MIMEs
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return array_keys($accepts_parsed);
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}
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/**
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* Checks whether given accept MIME that may contain * match given full
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* MIME.
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*
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* @param string $accept_mime MIME type that may contain * (e.g. text/*)
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* @param string $mime full MIME (e.g. application/json)
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* @return boolean match?
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*/
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public static function accept_match($accept_mime, $mime) {
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// invalid MIME
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if (!preg_match('/^([*]|[-\w]+)\/([*]|[-+\w]+)$/', $accept_mime) ||
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!preg_match('/^[-\w]+\/[-+\w]+$/', $mime)) {
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return FALSE;
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}
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// string match
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if (strpos($accept_mime, '*') === FALSE) {
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return (strcmp($accept_mime, $mime) == 0);
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}
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// build regex
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$am_regex = '|' . str_replace('*', '([-\w]+)', $accept_mime) . '|';
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// match?
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return !!preg_match($am_regex, $mime);
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}
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}
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