config =& load_class('Config', 'core'); log_message('debug', 'URI Class Initialized'); } // -------------------------------------------------------------------- /** * Get the URI String * * Called by CI_Router * * @return void */ public function _fetch_uri_string() { if (strtoupper($this->config->item('uri_protocol')) === 'AUTO') { // Is the request coming from the command line? if ($this->_is_cli_request()) { $this->_set_uri_string($this->_parse_cli_args()); return; } // Let's try the REQUEST_URI first, this will work in most situations if ($uri = $this->_detect_uri()) { $this->_set_uri_string($uri); return; } // Is there a PATH_INFO variable? // Note: some servers seem to have trouble with getenv() so we'll test it two ways $path = (isset($_SERVER['PATH_INFO'])) ? $_SERVER['PATH_INFO'] : @getenv('PATH_INFO'); if (trim($path, '/') != '' && $path !== '/'.SELF) { $this->_set_uri_string($path); return; } // No PATH_INFO?... What about QUERY_STRING? $path = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING'); if (trim($path, '/') != '') { $this->_set_uri_string($path); return; } // As a last ditch effort lets try using the $_GET array if (is_array($_GET) && count($_GET) === 1 && trim(key($_GET), '/') != '') { $this->_set_uri_string(key($_GET)); return; } // We've exhausted all our options... $this->uri_string = ''; return; } $uri = strtoupper($this->config->item('uri_protocol')); if ($uri === 'REQUEST_URI') { $this->_set_uri_string($this->_detect_uri()); return; } elseif ($uri === 'CLI') { $this->_set_uri_string($this->_parse_cli_args()); return; } $path = (isset($_SERVER[$uri])) ? $_SERVER[$uri] : @getenv($uri); $this->_set_uri_string($path); } // -------------------------------------------------------------------- /** * Set the URI String * * @param string * @return void */ public function _set_uri_string($str) { // Filter out control characters $str = remove_invisible_characters($str, FALSE); // If the URI contains only a slash we'll kill it $this->uri_string = ($str === '/') ? '' : $str; } // -------------------------------------------------------------------- /** * Detects the URI * * This function will detect the URI automatically and fix the query string * if necessary. * * @return string */ protected function _detect_uri() { if ( ! isset($_SERVER['REQUEST_URI']) OR ! isset($_SERVER['SCRIPT_NAME'])) { return ''; } $uri = $_SERVER['REQUEST_URI']; if (strpos($uri, $_SERVER['SCRIPT_NAME']) === 0) { $uri = substr($uri, strlen($_SERVER['SCRIPT_NAME'])); } elseif (strpos($uri, dirname($_SERVER['SCRIPT_NAME'])) === 0) { $uri = substr($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 $_GET array. if (strncmp($uri, '?/', 2) === 0) { $uri = substr($uri, 2); } $parts = preg_split('#\?#i', $uri, 2); $uri = $parts[0]; if (isset($parts[1])) { $_SERVER['QUERY_STRING'] = $parts[1]; parse_str($_SERVER['QUERY_STRING'], $_GET); } else { $_SERVER['QUERY_STRING'] = ''; $_GET = array(); } if ($uri == '/' OR empty($uri)) { return '/'; } $uri = parse_url($uri, PHP_URL_PATH); // Do some final cleaning of the URI and return it return str_replace(array('//', '../'), '/', trim($uri, '/')); } // -------------------------------------------------------------------- /** * Is cli Request? * * Duplicate of function from the Input class to test to see if a request was made from the command line * * @return boolean */ protected function _is_cli_request() { return (php_sapi_name() == 'cli') OR defined('STDIN'); } // -------------------------------------------------------------------- /** * Parse cli arguments * * Take each command line argument and assume it is a URI segment. * * @return string */ protected function _parse_cli_args() { $args = array_slice($_SERVER['argv'], 1); return $args ? '/' . implode('/', $args) : ''; } // -------------------------------------------------------------------- /** * Filter segments for malicious characters * * Called by CI_Router * * @param string * @return string */ public function _filter_uri($str) { if ($str != '' && $this->config->item('permitted_uri_chars') != '' && $this->config->item('enable_query_strings') == FALSE) { // preg_quote() in PHP 5.3 escapes -, so the str_replace() and addition of - to preg_quote() is to maintain backwards // compatibility as many are unaware of how characters in the permitted_uri_chars will be parsed as a regex pattern if ( ! preg_match('|^['.str_replace(array('\\-', '\-'), '-', preg_quote($this->config->item('permitted_uri_chars'), '-')).']+$|i', $str)) { show_error('The URI you submitted has disallowed characters.', 400); } } // Convert programatic characters to entities and return return str_replace( array('$', '(', ')', '%28', '%29'), // Bad array('$', '(', ')', '(', ')'), // Good $str); } // -------------------------------------------------------------------- /** * Remove the suffix from the URL if needed * * Called by CI_Router * * @return void */ public function _remove_url_suffix() { if ($this->config->item('url_suffix') != '') { $this->uri_string = preg_replace('|'.preg_quote($this->config->item('url_suffix')).'$|', '', $this->uri_string); } } // -------------------------------------------------------------------- /** * Explode the URI Segments. The individual segments will * be stored in the $this->segments array. * * Called by CI_Router * * @return void */ public function _explode_segments() { foreach (explode('/', preg_replace('|/*(.+?)/*$|', '\\1', $this->uri_string)) as $val) { // Filter segments for security $val = trim($this->_filter_uri($val)); if ($val != '') { $this->segments[] = $val; } } } // -------------------------------------------------------------------- /** * Re-index Segments * * This function re-indexes the $this->segment array so that it * starts at 1 rather than 0. Doing so makes it simpler to * use functions like $this->uri->segment(n) since there is * a 1:1 relationship between the segment array and the actual segments. * * Called by CI_Router * * @return void */ public function _reindex_segments() { array_unshift($this->segments, NULL); array_unshift($this->rsegments, NULL); unset($this->segments[0]); unset($this->rsegments[0]); } // -------------------------------------------------------------------- /** * Fetch a URI Segment * * This function returns the URI segment based on the number provided. * * @param integer * @param bool * @return string */ public function segment($n, $no_result = FALSE) { return ( ! isset($this->segments[$n])) ? $no_result : $this->segments[$n]; } // -------------------------------------------------------------------- /** * Fetch a URI "routed" Segment * * This function returns the re-routed URI segment (assuming routing rules are used) * based on the number provided. If there is no routing this function returns the * same result as $this->segment() * * @param integer * @param bool * @return string */ public function rsegment($n, $no_result = FALSE) { return ( ! isset($this->rsegments[$n])) ? $no_result : $this->rsegments[$n]; } // -------------------------------------------------------------------- /** * Generate a key value pair from the URI string * * This function generates and associative array of URI data starting * at the supplied segment. For example, if this is your URI: * * example.com/user/search/name/joe/location/UK/gender/male * * You can use this function to generate an array with this prototype: * * array ( * name => joe * location => UK * gender => male * ) * * @param integer the starting segment number * @param array an array of default values * @return array */ public function uri_to_assoc($n = 3, $default = array()) { return $this->_uri_to_assoc($n, $default, 'segment'); } /** * Identical to above only it uses the re-routed segment array * * @param integer the starting segment number * @param array an array of default values * @return array */ public function ruri_to_assoc($n = 3, $default = array()) { return $this->_uri_to_assoc($n, $default, 'rsegment'); } // -------------------------------------------------------------------- /** * Generate a key value pair from the URI string or Re-routed URI string * * @param integer the starting segment number * @param array an array of default values * @param string which array we should use * @return array */ protected function _uri_to_assoc($n = 3, $default = array(), $which = 'segment') { if ( ! is_numeric($n)) { return $default; } if (isset($this->keyval[$n])) { return $this->keyval[$n]; } if ($which === 'segment') { $total_segments = 'total_segments'; $segment_array = 'segment_array'; } else { $total_segments = 'total_rsegments'; $segment_array = 'rsegment_array'; } if ($this->$total_segments() < $n) { if (count($default) === 0) { return array(); } return array_fill_keys($default, FALSE); } $segments = array_slice($this->$segment_array(), ($n - 1)); $i = 0; $lastval = ''; $retval = array(); foreach ($segments as $seg) { if ($i % 2) { $retval[$lastval] = $seg; } else { $retval[$seg] = FALSE; $lastval = $seg; } $i++; } if (count($default) > 0) { foreach ($default as $val) { if ( ! array_key_exists($val, $retval)) { $retval[$val] = FALSE; } } } // Cache the array for reuse $this->keyval[$n] = $retval; return $retval; } // -------------------------------------------------------------------- /** * Generate a URI string from an associative array * * * @param array an associative array of key/values * @return array */ public function assoc_to_uri($array) { $temp = array(); foreach ((array)$array as $key => $val) { $temp[] = $key; $temp[] = $val; } return implode('/', $temp); } // -------------------------------------------------------------------- /** * Fetch a URI Segment and add a trailing slash * * @param integer * @param string * @return string */ public function slash_segment($n, $where = 'trailing') { return $this->_slash_segment($n, $where, 'segment'); } // -------------------------------------------------------------------- /** * Fetch a URI Segment and add a trailing slash * * @param integer * @param string * @return string */ public function slash_rsegment($n, $where = 'trailing') { return $this->_slash_segment($n, $where, 'rsegment'); } // -------------------------------------------------------------------- /** * Fetch a URI Segment and add a trailing slash - helper function * * @param integer * @param string * @param string * @return string */ protected function _slash_segment($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 */ public function segment_array() { return $this->segments; } // -------------------------------------------------------------------- /** * Routed Segment Array * * @return array */ public function rsegment_array() { return $this->rsegments; } // -------------------------------------------------------------------- /** * Total number of segments * * @return integer */ public function total_segments() { return count($this->segments); } // -------------------------------------------------------------------- /** * Total number of routed segments * * @return integer */ public function total_rsegments() { return count($this->rsegments); } // -------------------------------------------------------------------- /** * Fetch the entire URI string * * @return string */ public function uri_string() { return $this->uri_string; } // -------------------------------------------------------------------- /** * Fetch the entire Re-routed URI string * * @return string */ public function ruri_string() { return implode('/', $this->rsegment_array()); } } /* End of file URI.php */ /* Location: ./system/core/URI.php */