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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 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/) * @license https://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'); /** * Router Class * * Parses URIs and determines routing * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link https://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; /** * Translate URI dashes * * Determines whether dashes in controller & method segments * should be automatically replaced by underscores. * * @var bool */ public $translate_uri_dashes = FALSE; /** * Enable query strings flag * * Determines whether to use GET parameters or segment URIs * * @var bool */ public $enable_query_strings = FALSE; // -------------------------------------------------------------------- /** * Class constructor * * Runs the route mapping function. * * @param array $routing * @return void */ public function __construct($routing = NULL) { $this->config =& load_class('Config', 'core'); $this->uri =& load_class('URI', 'core'); $this->enable_query_strings = ( ! is_cli() && $this->config->item('enable_query_strings') === TRUE); // If a directory override is configured, it has to be set before any dynamic routing logic is_array($routing) && isset($routing['directory']) && $this->set_directory($routing['directory']); $this->_set_routing(); // Set any routing overrides that may exist in the main index file if (is_array($routing)) { empty($routing['controller']) OR $this->set_class($routing['controller']); empty($routing['function']) OR $this->set_method($routing['function']); } log_message('info', '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 */ protected function _set_routing() { // Load the routes.php file. It would be great if we could // skip this for enable_query_strings = TRUE, but then // default_controller would be empty ... if (file_exists(APPPATH.'config/routes.php')) { include(APPPATH.'config/routes.php'); } if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/routes.php')) { include(APPPATH.'config/'.ENVIRONMENT.'/routes.php'); } // Validate & get reserved routes if (isset($route) && is_array($route)) { isset($route['default_controller']) && $this->default_controller = $route['default_controller']; isset($route['translate_uri_dashes']) && $this->translate_uri_dashes = $route['translate_uri_dashes']; unset($route['default_controller'], $route['translate_uri_dashes']); $this->routes = $route; } // Are query strings enabled in the config file? Normally CI doesn't utilize query strings // since URI segments are more search-engine friendly, but they can optionally be used. // If this feature is enabled, we will gather the directory/class/method a little differently if ($this->enable_query_strings) { // If the directory is set at this time, it means an override exists, so skip the checks if ( ! isset($this->directory)) { $_d = $this->config->item('directory_trigger'); $_d = isset($_GET[$_d]) ? trim($_GET[$_d], " \t\n\r\0\x0B/") : ''; if ($_d !== '') { $this->uri->filter_uri($_d); $this->set_directory($_d); } } $_c = trim($this->config->item('controller_trigger')); if ( ! empty($_GET[$_c])) { $this->uri->filter_uri($_GET[$_c]); $this->set_class($_GET[$_c]); $_f = trim($this->config->item('function_trigger')); if ( ! empty($_GET[$_f])) { $this->uri->filter_uri($_GET[$_f]); $this->set_method($_GET[$_f]); } $this->uri->rsegments = array( 1 => $this->class, 2 => $this->method ); } else { $this->_set_default_controller(); } // Routing rules don't apply to query strings and we don't need to detect // directories, so we're done here return; } // Is there anything to parse? if ($this->uri->uri_string !== '') { $this->_parse_routes(); } else { $this->_set_default_controller(); } } // -------------------------------------------------------------------- /** * Set request route * * Takes an array of URI segments as input and sets the class/method * to be called. * * @used-by CI_Router::_parse_routes() * @param array $segments URI segments * @return void */ protected function _set_request($segments = array()) { $segments = $this->_validate_request($segments); // If we don't have any segments left - try the default controller; // WARNING: Directories get shifted out of the segments array! if (empty($segments)) { $this->_set_default_controller(); return; } if ($this->translate_uri_dashes === TRUE) { $segments[0] = str_replace('-', '_', $segments[0]); if (isset($segments[1])) { $segments[1] = str_replace('-', '_', $segments[1]); } } $this->set_class($segments[0]); if (isset($segments[1])) { $this->set_method($segments[1]); } else { $segments[1] = 'index'; } array_unshift($segments, NULL); unset($segments[0]); $this->uri->rsegments = $segments; } // -------------------------------------------------------------------- /** * Set default controller * * @return void */ protected function _set_default_controller() { if (empty($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) { $method = 'index'; } if ( ! file_exists(APPPATH.'controllers/'.$this->directory.ucfirst($class).'.php')) { // This will trigger 404 later return; } $this->set_class($class); $this->set_method($method); // Assign routed segments, index starting from 1 $this->uri->rsegments = array( 1 => $class, 2 => $method ); log_message('debug', 'No URI present. Default controller set.'); } // -------------------------------------------------------------------- /** * Validate request * * Attempts validate the URI request and determine the controller path. * * @used-by CI_Router::_set_request() * @param array $segments URI segments * @return mixed URI segments */ protected function _validate_request($segments) { $c = count($segments); $directory_override = isset($this->directory); // Loop through our segments and return as soon as a controller // is found or when such a directory doesn't exist while ($c-- > 0) { $test = $this->directory .ucfirst($this->translate_uri_dashes === TRUE ? str_replace('-', '_', $segments[0]) : $segments[0]); if ( ! file_exists(APPPATH.'controllers/'.$test.'.php') && $directory_override === FALSE && is_dir(APPPATH.'controllers/'.$this->directory.$segments[0]) ) { $this->set_directory(array_shift($segments), TRUE); continue; } return $segments; } // This means that all segments were actually directories return $segments; } // -------------------------------------------------------------------- /** * 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); // Get HTTP verb $http_verb = isset($_SERVER['REQUEST_METHOD']) ? strtolower($_SERVER['REQUEST_METHOD']) : 'cli'; // Loop through the route array looking for wildcards foreach ($this->routes as $key => $val) { // Check if route format is using HTTP verbs if (is_array($val)) { $val = array_change_key_case($val, CASE_LOWER); if (isset($val[$http_verb])) { $val = $val[$http_verb]; } else { continue; } } // Convert wildcards 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); // 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); } $this->_set_request(explode('/', $val)); return; } } // If we got this far it means we didn't encounter a // matching route so we'll set the site default route $this->_set_request(array_values($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 * * @deprecated 3.0.0 Read the 'class' property instead * @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 * * @deprecated 3.0.0 Read the 'method' property instead * @return string */ public function fetch_method() { return $this->method; } // -------------------------------------------------------------------- /** * Set directory name * * @param string $dir Directory name * @param bool $append Whether we're appending rather than setting the full value * @return void */ public function set_directory($dir, $append = FALSE) { if ($append !== TRUE OR empty($this->directory)) { $this->directory = str_replace('.', '', trim($dir, '/')).'/'; } else { $this->directory .= str_replace('.', '', trim($dir, '/')).'/'; } } // -------------------------------------------------------------------- /** * Fetch directory * * Feches the sub-directory (if any) that contains the requested * controller class. * * @deprecated 3.0.0 Read the 'directory' property instead * @return string */ public function fetch_directory() { return $this->directory; } }
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