<?php /** * CodeIgniter * * An open source application development framework for PHP 5.2.4 or newer * * NOTICE OF LICENSE * * Licensed under the Open Software License version 3.0 * * This source file is subject to the Open Software License (OSL 3.0) that is * bundled with this package in the files license.txt / license.rst. It is * also available through the world wide web at this URL: * http://opensource.org/licenses/OSL-3.0 * If you did not receive a copy of the license and are unable to obtain it * through the world wide web, please send an email to * licensing@ellislab.com so we can send you a copy immediately. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/) * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) * @link http://codeigniter.com * @since Version 1.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * Router Class * * Parses URIs and determines routing * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link http://codeigniter.com/user_guide/general/routing.html */ class CI_Router { /** * CI_Config class object * * @var object */ public $config; /** * List of routes * * @var array */ public $routes = array(); /** * Current class name * * @var string */ public $class = ''; /** * Current method name * * @var string */ public $method = 'index'; /** * Sub-directory that contains the requested controller class * * @var string */ public $directory = ''; /** * Default controller (and method if specific) * * @var string */ public $default_controller; /** * Class constructor * * Runs the route mapping function. * * @return void */ public function __construct() { $this->config =& load_class('Config', 'core'); $this->uri =& load_class('URI', 'core'); log_message('debug', 'Router Class Initialized'); } // -------------------------------------------------------------------- /** * Set route mapping * * Determines what should be served based on the URI request, * as well as any "routes" that have been set in the routing config file. * * @return void */ public function _set_routing() { // Are query strings enabled in the config file? Normally CI doesn't utilize query strings // since URI segments are more search-engine friendly, but they can optionally be used. // If this feature is enabled, we will gather the directory/class/method a little differently $segments = array(); if ($this->config->item('enable_query_strings') === TRUE && isset($_GET[$this->config->item('controller_trigger')])) { if (isset($_GET[$this->config->item('directory_trigger')])) { $this->set_directory(trim($this->uri->_filter_uri($_GET[$this->config->item('directory_trigger')]))); $segments[] = $this->fetch_directory(); } if (isset($_GET[$this->config->item('controller_trigger')])) { $this->set_class(trim($this->uri->_filter_uri($_GET[$this->config->item('controller_trigger')]))); $segments[] = $this->fetch_class(); } if (isset($_GET[$this->config->item('function_trigger')])) { $this->set_method(trim($this->uri->_filter_uri($_GET[$this->config->item('function_trigger')]))); $segments[] = $this->fetch_method(); } } // Load the routes.php file. if (defined('ENVIRONMENT') && is_file(APPPATH.'config/'.ENVIRONMENT.'/routes.php')) { include(APPPATH.'config/'.ENVIRONMENT.'/routes.php'); } elseif (is_file(APPPATH.'config/routes.php')) { include(APPPATH.'config/routes.php'); } $this->routes = (isset($route) && is_array($route)) ? $route : array(); unset($route); // Set the default controller so we can display it in the event // the URI doesn't correlated to a valid controller. $this->default_controller = empty($this->routes['default_controller']) ? FALSE : $this->routes['default_controller']; // Were there any query string segments? If so, we'll validate them and bail out since we're done. if (count($segments) > 0) { return $this->_validate_request($segments); } // Fetch the complete URI string $this->uri->_fetch_uri_string(); // Is there a URI string? If not, the default controller specified in the "routes" file will be shown. if ($this->uri->uri_string == '') { return $this->_set_default_controller(); } $this->uri->_remove_url_suffix(); // Remove the URL suffix $this->uri->_explode_segments(); // Compile the segments into an array $this->_parse_routes(); // Parse any custom routing that may exist $this->uri->_reindex_segments(); // Re-index the segment array so that it starts with 1 rather than 0 } // -------------------------------------------------------------------- /** * Set default controller * * @return void */ protected function _set_default_controller() { if (empty($this->default_controller)) { show_error('Unable to determine what should be displayed. A default route has not been specified in the routing file.'); } // Is the method being specified? if (sscanf($this->default_controller, '%[^/]/%s', $class, $method) !== 2) { $method = 'index'; } $this->set_class($class); $this->set_method($method); $this->_set_request(array($class, $method)); // re-index the routed segments array so it starts with 1 rather than 0 $this->uri->_reindex_segments(); log_message('debug', 'No URI present. Default controller set.'); } // -------------------------------------------------------------------- /** * Set request route * * Takes an array of URI segments as input and sets the class/method * to be called. * * @param array $segments URI segments * @return void */ protected function _set_request($segments = array()) { $segments = $this->_validate_request($segments); if (count($segments) === 0) { return $this->_set_default_controller(); } $this->set_class($segments[0]); isset($segments[1]) OR $segments[1] = 'index'; $this->set_method($segments[1]); // Update our "routed" segment array to contain the segments. // Note: If there is no custom routing, this array will be // identical to $this->uri->segments $this->uri->rsegments = $segments; } // -------------------------------------------------------------------- /** * Validate request * * Attempts validate the URI request and determine the controller path. * * @param array $segments URI segments * @return array URI segments */ protected function _validate_request($segments) { if (count($segments) === 0) { return $segments; } $temp = str_replace('-', '_', $segments[0]); // Does the requested controller exist in the root folder? if (file_exists(APPPATH.'controllers/'.$temp.'.php')) { $segments[0] = $temp; empty($segments[1]) OR $segments[1] = str_replace('-', '_', $segments[1]); return $segments; } // Is the controller in a sub-folder? if (is_dir(APPPATH.'controllers/'.$segments[0])) { // Set the directory and remove it from the segment array $this->set_directory(array_shift($segments)); if (count($segments) > 0) { $segments[0] = str_replace('-', '_', $segments[0]); empty($segments[1]) OR $segments[1] = str_replace('-', '_', $segments[1]); // Does the requested controller exist in the sub-folder? if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].'.php')) { if ( ! empty($this->routes['404_override'])) { $this->directory = ''; return explode('/', $this->routes['404_override'], 2); } else { show_404($this->fetch_directory().$segments[0]); } } } else { // Is the method being specified in the route? $segments = explode('/', $this->default_controller); if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].'.php')) { $this->directory = ''; } } return $segments; } // If we've gotten this far it means that the URI does not correlate to a valid // controller class. We will now see if there is an override if ( ! empty($this->routes['404_override'])) { if (sscanf($this->routes['404_override'], '%[^/]/%s', $class, $method) !== 2) { $method = 'index'; } return array($class, $method); } // Nothing else to do at this point but show a 404 show_404($segments[0]); } // -------------------------------------------------------------------- /** * Parse Routes * * Matches any routes that may exist in the config/routes.php file * against the URI to determine if the class/method need to be remapped. * * @return void */ protected function _parse_routes() { // Turn the segment array into a URI string $uri = implode('/', $this->uri->segments); // Is there a literal match? If so we're done if (isset($this->routes[$uri]) && is_string($this->routes[$uri])) { return $this->_set_request(explode('/', $this->routes[$uri])); } // Loop through the route array looking for wild-cards foreach ($this->routes as $key => $val) { // Convert wild-cards to RegEx $key = str_replace(array(':any', ':num'), array('[^/]+', '[0-9]+'), $key); // Does the RegEx match? if (preg_match('#^'.$key.'$#', $uri, $matches)) { // Are we using callbacks to process back-references? if ( ! is_string($val) && is_callable($val)) { // Remove the original string from the matches array. array_shift($matches); // Get the match count. $match_count = count($matches); // Determine how many parameters the callback has. $reflection = new ReflectionFunction($val); $param_count = $reflection->getNumberOfParameters(); // Are there more parameters than matches? if ($param_count > $match_count) { // Any params without matches will be set to an empty string. $matches = array_merge($matches, array_fill($match_count, $param_count - $match_count, '')); $match_count = $param_count; } // Get the parameters so we can use their default values. $params = $reflection->getParameters(); for ($m = 0; $m < $match_count; $m++) { // Is the match empty and does a default value exist? if (empty($matches[$m]) && $params[$m]->isDefaultValueAvailable()) { // Substitute the empty match for the default value. $matches[$m] = $params[$m]->getDefaultValue(); } } // Execute the callback using the values in matches as its parameters. $val = call_user_func_array($val, $matches); } // Are we using the default routing method for back-references? elseif (strpos($val, '$') !== FALSE && strpos($key, '(') !== FALSE) { $val = preg_replace('#^'.$key.'$#', $val, $uri); } return $this->_set_request(explode('/', $val)); } } // If we got this far it means we didn't encounter a // matching route so we'll set the site default route $this->_set_request($this->uri->segments); } // -------------------------------------------------------------------- /** * Set class name * * @param string $class Class name * @return void */ public function set_class($class) { $this->class = str_replace(array('/', '.'), '', $class); } // -------------------------------------------------------------------- /** * Fetch the current class * * @return string */ public function fetch_class() { return $this->class; } // -------------------------------------------------------------------- /** * Set method name * * @param string $method Method name * @return void */ public function set_method($method) { $this->method = $method; } // -------------------------------------------------------------------- /** * Fetch the current method * * @return string */ public function fetch_method() { return ($this->method === $this->fetch_class()) ? 'index' : $this->method; } // -------------------------------------------------------------------- /** * Set directory name * * @param string $dir Directory name * @return void */ public function set_directory($dir) { $this->directory = str_replace(array('/', '.'), '', $dir).'/'; } // -------------------------------------------------------------------- /** * Fetch directory * * Feches the sub-directory (if any) that contains the requested * controller class. * * @return string */ public function fetch_directory() { return $this->directory; } // -------------------------------------------------------------------- /** * Set controller overrides * * @param array $routing Route overrides * @return void */ public function _set_overrides($routing) { if ( ! is_array($routing)) { return; } if (isset($routing['directory'])) { $this->set_directory($routing['directory']); } if ( ! empty($routing['controller'])) { $this->set_class($routing['controller']); } if (isset($routing['function'])) { $routing['function'] = empty($routing['function']) ? 'index' : $routing['function']; $this->set_method($routing['function']); } } } /* End of file Router.php */ /* Location: ./system/core/Router.php */