479 行
12 KiB
PHP
479 行
12 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* Router Class
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*
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* Parses URIs and determines routing
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Libraries
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/userguide3/general/routing.html
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*/
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class CI_Router {
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/**
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* CI_URI class object
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*
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* @var object
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*/
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public $uri;
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/**
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* CI_Config class object
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*
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* @var object
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*/
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public $config;
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/**
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* List of routes
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*
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* @var array
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*/
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public $routes = array();
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/**
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* Current class name
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*
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* @var string
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*/
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public $class = '';
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/**
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* Current method name
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*
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* @var string
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*/
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public $method = 'index';
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/**
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* Sub-directory that contains the requested controller class
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*
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* @var string
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*/
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public $directory;
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/**
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* Default controller (and method if specific)
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*
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* @var string
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*/
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public $default_controller;
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/**
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* Translate URI dashes
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*
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* Determines whether dashes in controller & method segments
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* should be automatically replaced by underscores.
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*
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* @var bool
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*/
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public $translate_uri_dashes = FALSE;
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/**
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* Enable query strings flag
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*
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* Determines whether to use GET parameters or segment URIs
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*
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* @var bool
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*/
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public $enable_query_strings = FALSE;
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// --------------------------------------------------------------------
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/**
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* Class constructor
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*
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* Runs the route mapping function.
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*
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* @param array $routing
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* @return void
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*/
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public function __construct($routing = NULL)
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{
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$this->config =& load_class('Config', 'core');
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$this->uri =& load_class('URI', 'core');
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$this->enable_query_strings = ( ! is_cli() && $this->config->item('enable_query_strings') === TRUE);
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// If a directory override is configured, it has to be set before any dynamic routing logic
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is_array($routing) && isset($routing['directory']) && $this->set_directory($routing['directory']);
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$this->_set_routing();
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// Set any routing overrides that may exist in the main index file
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if (is_array($routing))
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{
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empty($routing['controller']) OR $this->set_class($routing['controller']);
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empty($routing['function']) OR $this->set_method($routing['function']);
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}
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log_message('info', 'Router Class Initialized');
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}
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// --------------------------------------------------------------------
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/**
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* Set route mapping
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*
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* Determines what should be served based on the URI request,
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* as well as any "routes" that have been set in the routing config file.
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*
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* @return void
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*/
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protected function _set_routing()
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{
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// Load the routes.php file. It would be great if we could
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// skip this for enable_query_strings = TRUE, but then
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// default_controller would be empty ...
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if (file_exists(APPPATH.'config/routes.php'))
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{
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include(APPPATH.'config/routes.php');
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}
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if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/routes.php'))
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{
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include(APPPATH.'config/'.ENVIRONMENT.'/routes.php');
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}
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// Validate & get reserved routes
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if (isset($route) && is_array($route))
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{
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isset($route['default_controller']) && $this->default_controller = $route['default_controller'];
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isset($route['translate_uri_dashes']) && $this->translate_uri_dashes = $route['translate_uri_dashes'];
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unset($route['default_controller'], $route['translate_uri_dashes']);
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$this->routes = $route;
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}
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// Are query strings enabled in the config file? Normally CI doesn't utilize query strings
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// since URI segments are more search-engine friendly, but they can optionally be used.
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// If this feature is enabled, we will gather the directory/class/method a little differently
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if ($this->enable_query_strings)
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{
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// If the directory is set at this time, it means an override exists, so skip the checks
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if ( ! isset($this->directory))
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{
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$_d = $this->config->item('directory_trigger');
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$_d = isset($_GET[$_d]) ? trim($_GET[$_d], " \t\n\r\0\x0B/") : '';
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if ($_d !== '')
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{
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$this->uri->filter_uri($_d);
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$this->set_directory($_d);
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}
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}
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$_c = trim($this->config->item('controller_trigger'));
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if ( ! empty($_GET[$_c]))
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{
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$this->uri->filter_uri($_GET[$_c]);
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$this->set_class($_GET[$_c]);
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$_f = trim($this->config->item('function_trigger'));
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if ( ! empty($_GET[$_f]))
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{
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$this->uri->filter_uri($_GET[$_f]);
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$this->set_method($_GET[$_f]);
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}
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$this->uri->rsegments = array(
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1 => $this->class,
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2 => $this->method
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);
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}
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else
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{
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$this->_set_default_controller();
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}
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// Routing rules don't apply to query strings and we don't need to detect
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// directories, so we're done here
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return;
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}
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// Is there anything to parse?
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if ($this->uri->uri_string !== '')
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{
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$this->_parse_routes();
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}
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else
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{
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$this->_set_default_controller();
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}
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}
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// --------------------------------------------------------------------
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/**
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* Set request route
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*
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* Takes an array of URI segments as input and sets the class/method
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* to be called.
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*
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* @used-by CI_Router::_parse_routes()
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* @param array $segments URI segments
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* @return void
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*/
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protected function _set_request($segments = array())
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{
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$segments = $this->_validate_request($segments);
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// If we don't have any segments left - try the default controller;
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// WARNING: Directories get shifted out of the segments array!
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if (empty($segments))
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{
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$this->_set_default_controller();
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return;
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}
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if ($this->translate_uri_dashes === TRUE)
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{
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$segments[0] = str_replace('-', '_', $segments[0]);
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if (isset($segments[1]))
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{
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$segments[1] = str_replace('-', '_', $segments[1]);
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}
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}
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$this->set_class($segments[0]);
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if (isset($segments[1]))
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{
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$this->set_method($segments[1]);
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}
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else
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{
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$segments[1] = 'index';
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}
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array_unshift($segments, NULL);
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unset($segments[0]);
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$this->uri->rsegments = $segments;
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}
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// --------------------------------------------------------------------
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/**
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* Set default controller
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*
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* @return void
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*/
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protected function _set_default_controller()
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{
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if (empty($this->default_controller))
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{
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show_error('Unable to determine what should be displayed. A default route has not been specified in the routing file.');
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}
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// Is the method being specified?
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if (sscanf($this->default_controller, '%[^/]/%s', $class, $method) !== 2)
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{
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$method = 'index';
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}
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if ( ! file_exists(APPPATH.'controllers/'.$this->directory.ucfirst($class).'.php'))
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{
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// This will trigger 404 later
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return;
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}
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$this->set_class($class);
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$this->set_method($method);
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// Assign routed segments, index starting from 1
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$this->uri->rsegments = array(
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1 => $class,
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2 => $method
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);
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log_message('debug', 'No URI present. Default controller set.');
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}
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// --------------------------------------------------------------------
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/**
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* Validate request
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*
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* Attempts validate the URI request and determine the controller path.
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*
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* @used-by CI_Router::_set_request()
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* @param array $segments URI segments
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* @return mixed URI segments
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*/
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protected function _validate_request($segments)
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{
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$c = count($segments);
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$directory_override = isset($this->directory);
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// Loop through our segments and return as soon as a controller
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// is found or when such a directory doesn't exist
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while ($c-- > 0)
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{
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$test = $this->directory
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.ucfirst($this->translate_uri_dashes === TRUE ? str_replace('-', '_', $segments[0]) : $segments[0]);
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if ( ! file_exists(APPPATH.'controllers/'.$test.'.php')
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&& $directory_override === FALSE
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&& is_dir(APPPATH.'controllers/'.$this->directory.$segments[0])
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)
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{
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$this->set_directory(array_shift($segments), TRUE);
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continue;
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}
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return $segments;
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}
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// This means that all segments were actually directories
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return $segments;
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}
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// --------------------------------------------------------------------
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/**
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* Parse Routes
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*
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* Matches any routes that may exist in the config/routes.php file
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* against the URI to determine if the class/method need to be remapped.
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*
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* @return void
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*/
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protected function _parse_routes()
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{
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// Turn the segment array into a URI string
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$uri = implode('/', $this->uri->segments);
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// Get HTTP verb
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$http_verb = isset($_SERVER['REQUEST_METHOD']) ? strtolower($_SERVER['REQUEST_METHOD']) : 'cli';
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// Loop through the route array looking for wildcards
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foreach ($this->routes as $key => $val)
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{
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// Check if route format is using HTTP verbs
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if (is_array($val))
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{
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$val = array_change_key_case($val, CASE_LOWER);
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if (isset($val[$http_verb]))
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{
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$val = $val[$http_verb];
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}
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else
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{
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continue;
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}
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}
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// Convert wildcards to RegEx
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$key = str_replace(array(':any', ':num'), array('[^/]+', '[0-9]+'), $key);
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// Does the RegEx match?
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if (preg_match('#^'.$key.'$#', $uri, $matches))
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{
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// Are we using callbacks to process back-references?
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if ( ! is_string($val) && is_callable($val))
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{
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// Remove the original string from the matches array.
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array_shift($matches);
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// Execute the callback using the values in matches as its parameters.
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$val = call_user_func_array($val, $matches);
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}
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// Are we using the default routing method for back-references?
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elseif (strpos($val, '$') !== FALSE && strpos($key, '(') !== FALSE)
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{
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$val = preg_replace('#^'.$key.'$#', $val, $uri);
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}
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$this->_set_request(explode('/', $val));
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return;
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}
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}
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// If we got this far it means we didn't encounter a
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// matching route so we'll set the site default route
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$this->_set_request(array_values($this->uri->segments));
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}
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// --------------------------------------------------------------------
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/**
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* Set class name
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*
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* @param string $class Class name
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* @return void
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*/
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public function set_class($class)
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{
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$this->class = str_replace(array('/', '.'), '', $class);
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}
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// --------------------------------------------------------------------
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/**
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* Set method name
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*
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* @param string $method Method name
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* @return void
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*/
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public function set_method($method)
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{
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$this->method = $method;
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}
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// --------------------------------------------------------------------
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/**
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* Set directory name
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*
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* @param string $dir Directory name
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* @param bool $append Whether we're appending rather than setting the full value
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* @return void
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*/
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public function set_directory($dir, $append = FALSE)
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{
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if ($append !== TRUE OR empty($this->directory))
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{
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$this->directory = str_replace('.', '', trim($dir, '/')).'/';
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}
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else
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{
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$this->directory .= str_replace('.', '', trim($dir, '/')).'/';
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}
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}
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}
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