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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * URI Class * * Parses URIs and determines routing * * @package CodeIgniter * @subpackage Libraries * @category URI * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/libraries/uri.html */ class CI_URI { /** * List of cached URI segments * * @var array */ public $keyval = array(); /** * Current URI string * * @var string */ public $uri_string = ''; /** * List of URI segments * * Starts at 1 instead of 0. * * @var array */ public $segments = array(); /** * List of routed URI segments * * Starts at 1 instead of 0. * * @var array */ public $rsegments = array(); /** * Permitted URI chars * * PCRE character group allowed in URI segments * * @var string */ protected $_permitted_uri_chars; /** * Class constructor * * @return void */ public function __construct() { $this->config =& load_class('Config', 'core'); // If query strings are enabled, we don't need to parse any segments. // However, they don't make sense under CLI. if (is_cli() OR $this->config->item('enable_query_strings') !== TRUE) { $this->_permitted_uri_chars = $this->config->item('permitted_uri_chars'); // If it's a CLI request, ignore the configuration if (is_cli()) { $uri = $this->_parse_argv(); } else { $protocol = $this->config->item('uri_protocol'); empty($protocol) && $protocol = 'REQUEST_URI'; switch ($protocol) { case 'AUTO': // For BC purposes only case 'REQUEST_URI': $uri = $this->_parse_request_uri(); break; case 'QUERY_STRING': $uri = $this->_parse_query_string(); break; case 'PATH_INFO': default: $uri = isset($_SERVER[$protocol]) ? $_SERVER[$protocol] : $this->_parse_request_uri(); break; } } $this->_set_uri_string($uri); } log_message('info', 'URI Class Initialized'); } // -------------------------------------------------------------------- /** * Set URI String * * @param string $str * @return void */ protected function _set_uri_string($str) { // Filter out control characters and trim slashes $this->uri_string = trim(remove_invisible_characters($str, FALSE), '/'); if ($this->uri_string !== '') { // Remove the URL suffix, if present if (($suffix = (string) $this->config->item('url_suffix')) !== '') { $slen = strlen($suffix); if (substr($this->uri_string, -$slen) === $suffix) { $this->uri_string = substr($this->uri_string, 0, -$slen); } } $this->segments[0] = NULL; // Populate the segments array foreach (explode('/', trim($this->uri_string, '/')) as $val) { $val = trim($val); // Filter segments for security $this->filter_uri($val); if ($val !== '') { $this->segments[] = $val; } } unset($this->segments[0]); } } // -------------------------------------------------------------------- /** * Parse REQUEST_URI * * Will parse REQUEST_URI and automatically detect the URI from it, * while fixing the query string if necessary. * * @return string */ protected function _parse_request_uri() { if ( ! isset($_SERVER['REQUEST_URI'], $_SERVER['SCRIPT_NAME'])) { return ''; } // parse_url() returns false if no host is present, but the path or query string // contains a colon followed by a number $uri = parse_url('http://dummy'.$_SERVER['REQUEST_URI']); $query = isset($uri['query']) ? $uri['query'] : ''; $uri = isset($uri['path']) ? $uri['path'] : ''; if (isset($_SERVER['SCRIPT_NAME'][0])) { if (strpos($uri, $_SERVER['SCRIPT_NAME']) === 0) { $uri = (string) substr($uri, strlen($_SERVER['SCRIPT_NAME'])); } elseif (strpos($uri, dirname($_SERVER['SCRIPT_NAME'])) === 0) { $uri = (string) substr($uri, strlen(dirname($_SERVER['SCRIPT_NAME']))); } } // This section ensures that even on servers that require the URI to be in the query string (Nginx) a correct // URI is found, and also fixes the QUERY_STRING server var and $_GET array. if (trim($uri, '/') === '' && strncmp($query, '/', 1) === 0) { $query = explode('?', $query, 2); $uri = $query[0]; $_SERVER['QUERY_STRING'] = isset($query[1]) ? $query[1] : ''; } else { $_SERVER['QUERY_STRING'] = $query; } parse_str($_SERVER['QUERY_STRING'], $_GET); if ($uri === '/' OR $uri === '') { return '/'; } // Do some final cleaning of the URI and return it return $this->_remove_relative_directory($uri); } // -------------------------------------------------------------------- /** * Parse QUERY_STRING * * Will parse QUERY_STRING and automatically detect the URI from it. * * @return string */ protected function _parse_query_string() { $uri = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING'); if (trim($uri, '/') === '') { return ''; } elseif (strncmp($uri, '/', 1) === 0) { $uri = explode('?', $uri, 2); $_SERVER['QUERY_STRING'] = isset($uri[1]) ? $uri[1] : ''; $uri = $uri[0]; } parse_str($_SERVER['QUERY_STRING'], $_GET); return $this->_remove_relative_directory($uri); } // -------------------------------------------------------------------- /** * Parse CLI arguments * * Take each command line argument and assume it is a URI segment. * * @return string */ protected function _parse_argv() { $args = array_slice($_SERVER['argv'], 1); return $args ? implode('/', $args) : ''; } // -------------------------------------------------------------------- /** * Remove relative directory (../) and multi slashes (///) * * Do some final cleaning of the URI and return it, currently only used in self::_parse_request_uri() * * @param string $uri * @return string */ protected function _remove_relative_directory($uri) { $uris = array(); $tok = strtok($uri, '/'); while ($tok !== FALSE) { if (( ! empty($tok) OR $tok === '0') && $tok !== '..') { $uris[] = $tok; } $tok = strtok('/'); } return implode('/', $uris); } // -------------------------------------------------------------------- /** * Filter URI * * Filters segments for malicious characters. * * @param string $str * @return void */ public function filter_uri(&$str) { if ( ! empty($str) && ! empty($this->_permitted_uri_chars) && ! preg_match('/^['.$this->_permitted_uri_chars.']+$/i'.(UTF8_ENABLED ? 'u' : ''), $str)) { show_error('The URI you submitted has disallowed characters.', 400); } } // -------------------------------------------------------------------- /** * Fetch URI Segment * * @see CI_URI::$segments * @param int $n Index * @param mixed $no_result What to return if the segment index is not found * @return mixed */ public function segment($n, $no_result = NULL) { return isset($this->segments[$n]) ? $this->segments[$n] : $no_result; } // -------------------------------------------------------------------- /** * Fetch URI "routed" Segment * * Returns the re-routed URI segment (assuming routing rules are used) * based on the index provided. If there is no routing, will return * the same result as CI_URI::segment(). * * @see CI_URI::$rsegments * @see CI_URI::segment() * @param int $n Index * @param mixed $no_result What to return if the segment index is not found * @return mixed */ public function rsegment($n, $no_result = NULL) { return isset($this->rsegments[$n]) ? $this->rsegments[$n] : $no_result; } // -------------------------------------------------------------------- /** * URI to assoc * * Generates an associative array of URI data starting at the supplied * segment index. For example, if this is your URI: * * example.com/user/search/name/joe/location/UK/gender/male * * You can use this method to generate an array with this prototype: * * array ( * name => joe * location => UK * gender => male * ) * * @param int $n Index (default: 3) * @param array $default Default values * @return array */ public function uri_to_assoc($n = 3, $default = array()) { return $this->_uri_to_assoc($n, $default, 'segment'); } // -------------------------------------------------------------------- /** * Routed URI to assoc * * Identical to CI_URI::uri_to_assoc(), only it uses the re-routed * segment array. * * @see CI_URI::uri_to_assoc() * @param int $n Index (default: 3) * @param array $default Default values * @return array */ public function ruri_to_assoc($n = 3, $default = array()) { return $this->_uri_to_assoc($n, $default, 'rsegment'); } // -------------------------------------------------------------------- /** * Internal URI-to-assoc * * Generates a key/value pair from the URI string or re-routed URI string. * * @used-by CI_URI::uri_to_assoc() * @used-by CI_URI::ruri_to_assoc() * @param int $n Index (default: 3) * @param array $default Default values * @param string $which Array name ('segment' or 'rsegment') * @return array */ protected function _uri_to_assoc($n = 3, $default = array(), $which = 'segment') { if ( ! is_numeric($n)) { return $default; } if (isset($this->keyval[$which], $this->keyval[$which][$n])) { return $this->keyval[$which][$n]; } $total_segments = "total_{$which}s"; $segment_array = "{$which}_array"; if ($this->$total_segments() < $n) { return (count($default) === 0) ? array() : array_fill_keys($default, NULL); } $segments = array_slice($this->$segment_array(), ($n - 1)); $i = 0; $lastval = ''; $retval = array(); foreach ($segments as $seg) { if ($i % 2) { $retval[$lastval] = $seg; } else { $retval[$seg] = NULL; $lastval = $seg; } $i++; } if (count($default) > 0) { foreach ($default as $val) { if ( ! array_key_exists($val, $retval)) { $retval[$val] = NULL; } } } // Cache the array for reuse isset($this->keyval[$which]) OR $this->keyval[$which] = array(); $this->keyval[$which][$n] = $retval; return $retval; } // -------------------------------------------------------------------- /** * Assoc to URI * * Generates a URI string from an associative array. * * @param array $array Input array of key/value pairs * @return string URI string */ public function assoc_to_uri($array) { $temp = array(); foreach ((array) $array as $key => $val) { $temp[] = $key; $temp[] = $val; } return implode('/', $temp); } // -------------------------------------------------------------------- /** * Slash segment * * Fetches an URI segment with a slash. * * @param int $n Index * @param string $where Where to add the slash ('trailing' or 'leading') * @return string */ public function slash_segment($n, $where = 'trailing') { return $this->_slash_segment($n, $where, 'segment'); } // -------------------------------------------------------------------- /** * Slash routed segment * * Fetches an URI routed segment with a slash. * * @param int $n Index * @param string $where Where to add the slash ('trailing' or 'leading') * @return string */ public function slash_rsegment($n, $where = 'trailing') { return $this->_slash_segment($n, $where, 'rsegment'); } // -------------------------------------------------------------------- /** * Internal Slash segment * * Fetches an URI Segment and adds a slash to it. * * @used-by CI_URI::slash_segment() * @used-by CI_URI::slash_rsegment() * * @param int $n Index * @param string $where Where to add the slash ('trailing' or 'leading') * @param string $which Array name ('segment' or 'rsegment') * @return string */ protected function _slash_segment($n, $where = 'trailing', $which = 'segment') { $leading = $trailing = '/'; if ($where === 'trailing') { $leading = ''; } elseif ($where === 'leading') { $trailing = ''; } return $leading.$this->$which($n).$trailing; } // -------------------------------------------------------------------- /** * Segment Array * * @return array CI_URI::$segments */ public function segment_array() { return $this->segments; } // -------------------------------------------------------------------- /** * Routed Segment Array * * @return array CI_URI::$rsegments */ public function rsegment_array() { return $this->rsegments; } // -------------------------------------------------------------------- /** * Total number of segments * * @return int */ public function total_segments() { return count($this->segments); } // -------------------------------------------------------------------- /** * Total number of routed segments * * @return int */ public function total_rsegments() { return count($this->rsegments); } // -------------------------------------------------------------------- /** * Fetch URI string * * @return string CI_URI::$uri_string */ public function uri_string() { return $this->uri_string; } // -------------------------------------------------------------------- /** * Fetch Re-routed URI string * * @return string */ public function ruri_string() { return ltrim(load_class('Router', 'core')->directory, '/').implode('/', $this->rsegments); } }