[1] | 1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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| 2 | /** |
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| 3 | * CodeIgniter |
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| 4 | * |
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| 5 | * An open source application development framework for PHP 5.1.6 or newer |
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| 6 | * |
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| 7 | * @package CodeIgniter |
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| 8 | * @author ExpressionEngine Dev Team |
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| 9 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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| 10 | * @license http://codeigniter.com/user_guide/license.html |
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| 11 | * @link http://codeigniter.com |
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| 12 | * @since Version 1.0 |
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| 13 | * @filesource |
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| 14 | */ |
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| 15 | |
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| 16 | // ------------------------------------------------------------------------ |
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| 17 | |
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| 18 | /** |
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| 19 | * URI Class |
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| 20 | * |
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| 21 | * Parses URIs and determines routing |
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| 22 | * |
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| 23 | * @package CodeIgniter |
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| 24 | * @subpackage Libraries |
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| 25 | * @category URI |
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| 26 | * @author ExpressionEngine Dev Team |
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| 27 | * @link http://codeigniter.com/user_guide/libraries/uri.html |
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| 28 | */ |
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| 29 | class CI_URI { |
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| 30 | |
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| 31 | /** |
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| 32 | * List of cached uri segments |
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| 33 | * |
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| 34 | * @var array |
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| 35 | * @access public |
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| 36 | */ |
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| 37 | var $keyval = array(); |
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| 38 | /** |
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| 39 | * Current uri string |
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| 40 | * |
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| 41 | * @var string |
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| 42 | * @access public |
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| 43 | */ |
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| 44 | var $uri_string; |
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| 45 | /** |
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| 46 | * List of uri segments |
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| 47 | * |
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| 48 | * @var array |
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| 49 | * @access public |
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| 50 | */ |
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| 51 | var $segments = array(); |
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| 52 | /** |
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| 53 | * Re-indexed list of uri segments |
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| 54 | * Starts at 1 instead of 0 |
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| 55 | * |
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| 56 | * @var array |
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| 57 | * @access public |
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| 58 | */ |
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| 59 | var $rsegments = array(); |
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| 60 | |
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| 61 | /** |
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| 62 | * Constructor |
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| 63 | * |
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| 64 | * Simply globalizes the $RTR object. The front |
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| 65 | * loads the Router class early on so it's not available |
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| 66 | * normally as other classes are. |
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| 67 | * |
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| 68 | * @access public |
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| 69 | */ |
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| 70 | function __construct() |
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| 71 | { |
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| 72 | $this->config =& load_class('Config', 'core'); |
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| 73 | log_message('debug', "URI Class Initialized"); |
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| 74 | } |
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| 75 | |
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| 76 | |
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| 77 | // -------------------------------------------------------------------- |
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| 78 | |
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| 79 | /** |
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| 80 | * Get the URI String |
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| 81 | * |
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| 82 | * @access private |
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| 83 | * @return string |
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| 84 | */ |
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| 85 | function _fetch_uri_string() |
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| 86 | { |
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| 87 | if (strtoupper($this->config->item('uri_protocol')) == 'AUTO') |
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| 88 | { |
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| 89 | // Is the request coming from the command line? |
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| 90 | if (php_sapi_name() == 'cli' or defined('STDIN')) |
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| 91 | { |
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| 92 | $this->_set_uri_string($this->_parse_cli_args()); |
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| 93 | return; |
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| 94 | } |
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| 95 | |
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| 96 | // Let's try the REQUEST_URI first, this will work in most situations |
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| 97 | if ($uri = $this->_detect_uri()) |
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| 98 | { |
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| 99 | $this->_set_uri_string($uri); |
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| 100 | return; |
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| 101 | } |
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| 102 | |
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| 103 | // Is there a PATH_INFO variable? |
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| 104 | // Note: some servers seem to have trouble with getenv() so we'll test it two ways |
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| 105 | $path = (isset($_SERVER['PATH_INFO'])) ? $_SERVER['PATH_INFO'] : @getenv('PATH_INFO'); |
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| 106 | if (trim($path, '/') != '' && $path != "/".SELF) |
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| 107 | { |
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| 108 | $this->_set_uri_string($path); |
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| 109 | return; |
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| 110 | } |
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| 111 | |
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| 112 | // No PATH_INFO?... What about QUERY_STRING? |
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| 113 | $path = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING'); |
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| 114 | if (trim($path, '/') != '') |
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| 115 | { |
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| 116 | $this->_set_uri_string($path); |
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| 117 | return; |
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| 118 | } |
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| 119 | |
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| 120 | // As a last ditch effort lets try using the $_GET array |
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| 121 | if (is_array($_GET) && count($_GET) == 1 && trim(key($_GET), '/') != '') |
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| 122 | { |
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| 123 | $this->_set_uri_string(key($_GET)); |
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| 124 | return; |
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| 125 | } |
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| 126 | |
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| 127 | // We've exhausted all our options... |
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| 128 | $this->uri_string = ''; |
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| 129 | return; |
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| 130 | } |
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| 131 | |
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| 132 | $uri = strtoupper($this->config->item('uri_protocol')); |
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| 133 | |
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| 134 | if ($uri == 'REQUEST_URI') |
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| 135 | { |
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| 136 | $this->_set_uri_string($this->_detect_uri()); |
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| 137 | return; |
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| 138 | } |
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| 139 | elseif ($uri == 'CLI') |
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| 140 | { |
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| 141 | $this->_set_uri_string($this->_parse_cli_args()); |
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| 142 | return; |
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| 143 | } |
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| 144 | |
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| 145 | $path = (isset($_SERVER[$uri])) ? $_SERVER[$uri] : @getenv($uri); |
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| 146 | $this->_set_uri_string($path); |
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| 147 | } |
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| 148 | |
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| 149 | // -------------------------------------------------------------------- |
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| 150 | |
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| 151 | /** |
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| 152 | * Set the URI String |
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| 153 | * |
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| 154 | * @access public |
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| 155 | * @param string |
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| 156 | * @return string |
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| 157 | */ |
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| 158 | function _set_uri_string($str) |
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| 159 | { |
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| 160 | // Filter out control characters |
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| 161 | $str = remove_invisible_characters($str, FALSE); |
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| 162 | |
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| 163 | // If the URI contains only a slash we'll kill it |
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| 164 | $this->uri_string = ($str == '/') ? '' : $str; |
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| 165 | } |
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| 166 | |
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| 167 | // -------------------------------------------------------------------- |
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| 168 | |
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| 169 | /** |
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| 170 | * Detects the URI |
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| 171 | * |
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| 172 | * This function will detect the URI automatically and fix the query string |
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| 173 | * if necessary. |
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| 174 | * |
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| 175 | * @access private |
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| 176 | * @return string |
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| 177 | */ |
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| 178 | private function _detect_uri() |
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| 179 | { |
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| 180 | if ( ! isset($_SERVER['REQUEST_URI']) OR ! isset($_SERVER['SCRIPT_NAME'])) |
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| 181 | { |
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| 182 | return ''; |
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| 183 | } |
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| 184 | |
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| 185 | $uri = $_SERVER['REQUEST_URI']; |
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| 186 | if (strpos($uri, $_SERVER['SCRIPT_NAME']) === 0) |
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| 187 | { |
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| 188 | $uri = substr($uri, strlen($_SERVER['SCRIPT_NAME'])); |
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| 189 | } |
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| 190 | elseif (strpos($uri, dirname($_SERVER['SCRIPT_NAME'])) === 0) |
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| 191 | { |
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| 192 | $uri = substr($uri, strlen(dirname($_SERVER['SCRIPT_NAME']))); |
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| 193 | } |
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| 194 | |
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| 195 | // This section ensures that even on servers that require the URI to be in the query string (Nginx) a correct |
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| 196 | // URI is found, and also fixes the QUERY_STRING server var and $_GET array. |
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| 197 | if (strncmp($uri, '?/', 2) === 0) |
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| 198 | { |
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| 199 | $uri = substr($uri, 2); |
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| 200 | } |
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| 201 | $parts = preg_split('#\?#i', $uri, 2); |
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| 202 | $uri = $parts[0]; |
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| 203 | if (isset($parts[1])) |
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| 204 | { |
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| 205 | $_SERVER['QUERY_STRING'] = $parts[1]; |
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| 206 | parse_str($_SERVER['QUERY_STRING'], $_GET); |
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| 207 | } |
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| 208 | else |
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| 209 | { |
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| 210 | $_SERVER['QUERY_STRING'] = ''; |
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| 211 | $_GET = array(); |
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| 212 | } |
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| 213 | |
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| 214 | if ($uri == '/' || empty($uri)) |
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| 215 | { |
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| 216 | return '/'; |
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| 217 | } |
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| 218 | |
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| 219 | $uri = parse_url($uri, PHP_URL_PATH); |
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| 220 | |
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| 221 | // Do some final cleaning of the URI and return it |
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| 222 | return str_replace(array('//', '../'), '/', trim($uri, '/')); |
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| 223 | } |
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| 224 | |
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| 225 | // -------------------------------------------------------------------- |
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| 226 | |
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| 227 | /** |
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| 228 | * Parse cli arguments |
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| 229 | * |
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| 230 | * Take each command line argument and assume it is a URI segment. |
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| 231 | * |
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| 232 | * @access private |
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| 233 | * @return string |
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| 234 | */ |
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| 235 | private function _parse_cli_args() |
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| 236 | { |
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| 237 | $args = array_slice($_SERVER['argv'], 1); |
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| 238 | |
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| 239 | return $args ? '/' . implode('/', $args) : ''; |
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| 240 | } |
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| 241 | |
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| 242 | // -------------------------------------------------------------------- |
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| 243 | |
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| 244 | /** |
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| 245 | * Filter segments for malicious characters |
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| 246 | * |
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| 247 | * @access private |
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| 248 | * @param string |
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| 249 | * @return string |
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| 250 | */ |
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| 251 | function _filter_uri($str) |
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| 252 | { |
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| 253 | if ($str != '' && $this->config->item('permitted_uri_chars') != '' && $this->config->item('enable_query_strings') == FALSE) |
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| 254 | { |
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| 255 | // preg_quote() in PHP 5.3 escapes -, so the str_replace() and addition of - to preg_quote() is to maintain backwards |
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| 256 | // compatibility as many are unaware of how characters in the permitted_uri_chars will be parsed as a regex pattern |
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| 257 | if ( ! preg_match("|^[".str_replace(array('\\-', '\-'), '-', preg_quote($this->config->item('permitted_uri_chars'), '-'))."]+$|i", $str)) |
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| 258 | { |
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| 259 | show_error('The URI you submitted has disallowed characters.', 400); |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | // Convert programatic characters to entities |
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| 264 | $bad = array('$', '(', ')', '%28', '%29'); |
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| 265 | $good = array('$', '(', ')', '(', ')'); |
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| 266 | |
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| 267 | return str_replace($bad, $good, $str); |
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| 268 | } |
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| 269 | |
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| 270 | // -------------------------------------------------------------------- |
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| 271 | |
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| 272 | /** |
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| 273 | * Remove the suffix from the URL if needed |
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| 274 | * |
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| 275 | * @access private |
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| 276 | * @return void |
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| 277 | */ |
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| 278 | function _remove_url_suffix() |
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| 279 | { |
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| 280 | if ($this->config->item('url_suffix') != "") |
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| 281 | { |
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| 282 | $this->uri_string = preg_replace("|".preg_quote($this->config->item('url_suffix'))."$|", "", $this->uri_string); |
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| 283 | } |
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| 284 | } |
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| 285 | |
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| 286 | // -------------------------------------------------------------------- |
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| 287 | |
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| 288 | /** |
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| 289 | * Explode the URI Segments. The individual segments will |
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| 290 | * be stored in the $this->segments array. |
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| 291 | * |
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| 292 | * @access private |
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| 293 | * @return void |
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| 294 | */ |
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| 295 | function _explode_segments() |
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| 296 | { |
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| 297 | foreach (explode("/", preg_replace("|/*(.+?)/*$|", "\\1", $this->uri_string)) as $val) |
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| 298 | { |
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| 299 | // Filter segments for security |
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| 300 | $val = trim($this->_filter_uri($val)); |
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| 301 | |
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| 302 | if ($val != '') |
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| 303 | { |
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| 304 | $this->segments[] = $val; |
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| 305 | } |
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| 306 | } |
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| 307 | } |
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| 308 | |
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| 309 | // -------------------------------------------------------------------- |
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| 310 | /** |
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| 311 | * Re-index Segments |
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| 312 | * |
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| 313 | * This function re-indexes the $this->segment array so that it |
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| 314 | * starts at 1 rather than 0. Doing so makes it simpler to |
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| 315 | * use functions like $this->uri->segment(n) since there is |
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| 316 | * a 1:1 relationship between the segment array and the actual segments. |
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| 317 | * |
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| 318 | * @access private |
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| 319 | * @return void |
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| 320 | */ |
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| 321 | function _reindex_segments() |
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| 322 | { |
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| 323 | array_unshift($this->segments, NULL); |
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| 324 | array_unshift($this->rsegments, NULL); |
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| 325 | unset($this->segments[0]); |
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| 326 | unset($this->rsegments[0]); |
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| 327 | } |
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| 328 | |
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| 329 | // -------------------------------------------------------------------- |
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| 330 | |
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| 331 | /** |
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| 332 | * Fetch a URI Segment |
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| 333 | * |
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| 334 | * This function returns the URI segment based on the number provided. |
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| 335 | * |
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| 336 | * @access public |
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| 337 | * @param integer |
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| 338 | * @param bool |
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| 339 | * @return string |
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| 340 | */ |
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| 341 | function segment($n, $no_result = FALSE) |
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| 342 | { |
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| 343 | return ( ! isset($this->segments[$n])) ? $no_result : $this->segments[$n]; |
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| 344 | } |
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| 345 | |
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| 346 | // -------------------------------------------------------------------- |
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| 347 | |
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| 348 | /** |
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| 349 | * Fetch a URI "routed" Segment |
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| 350 | * |
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| 351 | * This function returns the re-routed URI segment (assuming routing rules are used) |
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| 352 | * based on the number provided. If there is no routing this function returns the |
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| 353 | * same result as $this->segment() |
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| 354 | * |
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| 355 | * @access public |
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| 356 | * @param integer |
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| 357 | * @param bool |
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| 358 | * @return string |
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| 359 | */ |
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| 360 | function rsegment($n, $no_result = FALSE) |
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| 361 | { |
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| 362 | return ( ! isset($this->rsegments[$n])) ? $no_result : $this->rsegments[$n]; |
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| 363 | } |
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| 364 | |
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| 365 | // -------------------------------------------------------------------- |
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| 366 | |
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| 367 | /** |
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| 368 | * Generate a key value pair from the URI string |
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| 369 | * |
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| 370 | * This function generates and associative array of URI data starting |
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| 371 | * at the supplied segment. For example, if this is your URI: |
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| 372 | * |
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| 373 | * example.com/user/search/name/joe/location/UK/gender/male |
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| 374 | * |
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| 375 | * You can use this function to generate an array with this prototype: |
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| 376 | * |
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| 377 | * array ( |
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| 378 | * name => joe |
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| 379 | * location => UK |
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| 380 | * gender => male |
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| 381 | * ) |
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| 382 | * |
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| 383 | * @access public |
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| 384 | * @param integer the starting segment number |
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| 385 | * @param array an array of default values |
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| 386 | * @return array |
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| 387 | */ |
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| 388 | function uri_to_assoc($n = 3, $default = array()) |
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| 389 | { |
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| 390 | return $this->_uri_to_assoc($n, $default, 'segment'); |
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| 391 | } |
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| 392 | /** |
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| 393 | * Identical to above only it uses the re-routed segment array |
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| 394 | * |
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| 395 | * @access public |
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| 396 | * @param integer the starting segment number |
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| 397 | * @param array an array of default values |
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| 398 | * @return array |
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| 399 | * |
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| 400 | */ |
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| 401 | function ruri_to_assoc($n = 3, $default = array()) |
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| 402 | { |
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| 403 | return $this->_uri_to_assoc($n, $default, 'rsegment'); |
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| 404 | } |
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| 405 | |
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| 406 | // -------------------------------------------------------------------- |
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| 407 | |
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| 408 | /** |
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| 409 | * Generate a key value pair from the URI string or Re-routed URI string |
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| 410 | * |
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| 411 | * @access private |
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| 412 | * @param integer the starting segment number |
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| 413 | * @param array an array of default values |
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| 414 | * @param string which array we should use |
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| 415 | * @return array |
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| 416 | */ |
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| 417 | function _uri_to_assoc($n = 3, $default = array(), $which = 'segment') |
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| 418 | { |
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| 419 | if ($which == 'segment') |
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| 420 | { |
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| 421 | $total_segments = 'total_segments'; |
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| 422 | $segment_array = 'segment_array'; |
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| 423 | } |
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| 424 | else |
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| 425 | { |
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| 426 | $total_segments = 'total_rsegments'; |
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| 427 | $segment_array = 'rsegment_array'; |
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| 428 | } |
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| 429 | |
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| 430 | if ( ! is_numeric($n)) |
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| 431 | { |
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| 432 | return $default; |
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| 433 | } |
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| 434 | |
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| 435 | if (isset($this->keyval[$n])) |
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| 436 | { |
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| 437 | return $this->keyval[$n]; |
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| 438 | } |
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| 439 | |
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| 440 | if ($this->$total_segments() < $n) |
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| 441 | { |
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| 442 | if (count($default) == 0) |
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| 443 | { |
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| 444 | return array(); |
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| 445 | } |
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| 446 | |
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| 447 | $retval = array(); |
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| 448 | foreach ($default as $val) |
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| 449 | { |
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| 450 | $retval[$val] = FALSE; |
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| 451 | } |
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| 452 | return $retval; |
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| 453 | } |
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| 454 | |
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| 455 | $segments = array_slice($this->$segment_array(), ($n - 1)); |
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| 456 | |
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| 457 | $i = 0; |
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| 458 | $lastval = ''; |
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| 459 | $retval = array(); |
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| 460 | foreach ($segments as $seg) |
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| 461 | { |
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| 462 | if ($i % 2) |
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| 463 | { |
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| 464 | $retval[$lastval] = $seg; |
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| 465 | } |
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| 466 | else |
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| 467 | { |
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| 468 | $retval[$seg] = FALSE; |
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| 469 | $lastval = $seg; |
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| 470 | } |
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| 471 | |
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| 472 | $i++; |
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| 473 | } |
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| 474 | |
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| 475 | if (count($default) > 0) |
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| 476 | { |
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| 477 | foreach ($default as $val) |
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| 478 | { |
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| 479 | if ( ! array_key_exists($val, $retval)) |
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| 480 | { |
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| 481 | $retval[$val] = FALSE; |
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| 482 | } |
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| 483 | } |
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| 484 | } |
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| 485 | |
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| 486 | // Cache the array for reuse |
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| 487 | $this->keyval[$n] = $retval; |
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| 488 | return $retval; |
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| 489 | } |
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| 490 | |
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| 491 | // -------------------------------------------------------------------- |
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| 492 | |
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| 493 | /** |
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| 494 | * Generate a URI string from an associative array |
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| 495 | * |
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| 496 | * |
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| 497 | * @access public |
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| 498 | * @param array an associative array of key/values |
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| 499 | * @return array |
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| 500 | */ |
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| 501 | function assoc_to_uri($array) |
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| 502 | { |
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| 503 | $temp = array(); |
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| 504 | foreach ((array)$array as $key => $val) |
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| 505 | { |
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| 506 | $temp[] = $key; |
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| 507 | $temp[] = $val; |
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| 508 | } |
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| 509 | |
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| 510 | return implode('/', $temp); |
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| 511 | } |
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| 512 | |
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| 513 | // -------------------------------------------------------------------- |
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| 514 | |
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| 515 | /** |
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| 516 | * Fetch a URI Segment and add a trailing slash |
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| 517 | * |
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| 518 | * @access public |
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| 519 | * @param integer |
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| 520 | * @param string |
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| 521 | * @return string |
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| 522 | */ |
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| 523 | function slash_segment($n, $where = 'trailing') |
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| 524 | { |
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| 525 | return $this->_slash_segment($n, $where, 'segment'); |
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| 526 | } |
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| 527 | |
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| 528 | // -------------------------------------------------------------------- |
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| 529 | |
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| 530 | /** |
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| 531 | * Fetch a URI Segment and add a trailing slash |
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| 532 | * |
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| 533 | * @access public |
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| 534 | * @param integer |
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| 535 | * @param string |
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| 536 | * @return string |
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| 537 | */ |
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| 538 | function slash_rsegment($n, $where = 'trailing') |
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| 539 | { |
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| 540 | return $this->_slash_segment($n, $where, 'rsegment'); |
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| 541 | } |
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| 542 | |
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| 543 | // -------------------------------------------------------------------- |
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| 544 | |
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| 545 | /** |
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| 546 | * Fetch a URI Segment and add a trailing slash - helper function |
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| 547 | * |
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| 548 | * @access private |
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| 549 | * @param integer |
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| 550 | * @param string |
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| 551 | * @param string |
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| 552 | * @return string |
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| 553 | */ |
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| 554 | function _slash_segment($n, $where = 'trailing', $which = 'segment') |
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| 555 | { |
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| 556 | $leading = '/'; |
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| 557 | $trailing = '/'; |
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| 558 | |
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| 559 | if ($where == 'trailing') |
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| 560 | { |
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| 561 | $leading = ''; |
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| 562 | } |
---|
| 563 | elseif ($where == 'leading') |
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| 564 | { |
---|
| 565 | $trailing = ''; |
---|
| 566 | } |
---|
| 567 | |
---|
| 568 | return $leading.$this->$which($n).$trailing; |
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| 569 | } |
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| 570 | |
---|
| 571 | // -------------------------------------------------------------------- |
---|
| 572 | |
---|
| 573 | /** |
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| 574 | * Segment Array |
---|
| 575 | * |
---|
| 576 | * @access public |
---|
| 577 | * @return array |
---|
| 578 | */ |
---|
| 579 | function segment_array() |
---|
| 580 | { |
---|
| 581 | return $this->segments; |
---|
| 582 | } |
---|
| 583 | |
---|
| 584 | // -------------------------------------------------------------------- |
---|
| 585 | |
---|
| 586 | /** |
---|
| 587 | * Routed Segment Array |
---|
| 588 | * |
---|
| 589 | * @access public |
---|
| 590 | * @return array |
---|
| 591 | */ |
---|
| 592 | function rsegment_array() |
---|
| 593 | { |
---|
| 594 | return $this->rsegments; |
---|
| 595 | } |
---|
| 596 | |
---|
| 597 | // -------------------------------------------------------------------- |
---|
| 598 | |
---|
| 599 | /** |
---|
| 600 | * Total number of segments |
---|
| 601 | * |
---|
| 602 | * @access public |
---|
| 603 | * @return integer |
---|
| 604 | */ |
---|
| 605 | function total_segments() |
---|
| 606 | { |
---|
| 607 | return count($this->segments); |
---|
| 608 | } |
---|
| 609 | |
---|
| 610 | // -------------------------------------------------------------------- |
---|
| 611 | |
---|
| 612 | /** |
---|
| 613 | * Total number of routed segments |
---|
| 614 | * |
---|
| 615 | * @access public |
---|
| 616 | * @return integer |
---|
| 617 | */ |
---|
| 618 | function total_rsegments() |
---|
| 619 | { |
---|
| 620 | return count($this->rsegments); |
---|
| 621 | } |
---|
| 622 | |
---|
| 623 | // -------------------------------------------------------------------- |
---|
| 624 | |
---|
| 625 | /** |
---|
| 626 | * Fetch the entire URI string |
---|
| 627 | * |
---|
| 628 | * @access public |
---|
| 629 | * @return string |
---|
| 630 | */ |
---|
| 631 | function uri_string() |
---|
| 632 | { |
---|
| 633 | return $this->uri_string; |
---|
| 634 | } |
---|
| 635 | |
---|
| 636 | |
---|
| 637 | // -------------------------------------------------------------------- |
---|
| 638 | |
---|
| 639 | /** |
---|
| 640 | * Fetch the entire Re-routed URI string |
---|
| 641 | * |
---|
| 642 | * @access public |
---|
| 643 | * @return string |
---|
| 644 | */ |
---|
| 645 | function ruri_string() |
---|
| 646 | { |
---|
| 647 | return '/'.implode('/', $this->rsegment_array()); |
---|
| 648 | } |
---|
| 649 | |
---|
| 650 | } |
---|
| 651 | // END URI Class |
---|
| 652 | |
---|
| 653 | /* End of file URI.php */ |
---|
| 654 | /* Location: ./system/core/URI.php */ |
---|