459 行
无行尾
11 KiB
PHP
459 行
无行尾
11 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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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 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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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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* @author ExpressionEngine Dev Team
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* @category Libraries
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* @link http://codeigniter.com/user_guide/general/routing.html
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*/
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class CI_Router {
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var $config;
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var $routes = array();
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var $error_routes = array();
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var $class = '';
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var $method = 'index';
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var $directory = '';
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var $default_controller;
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/**
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* Constructor
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*
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* Runs the route mapping function.
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*/
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function __construct()
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{
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$this->config =& load_class('Config', 'core');
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$this->uri =& load_class('URI', 'core');
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log_message('debug', "Router Class Initialized");
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}
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// --------------------------------------------------------------------
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/**
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* Set the route mapping
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*
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* This function determines what should be served based on the URI request,
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* as well as any "routes" that have been set in the routing config file.
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*
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* @access private
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* @return void
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*/
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function _set_routing()
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{
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// Are query strings enabled in the config file? Normally CI doesn't utilize query strings
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// since URI segments are more search-engine friendly, but they can optionally be used.
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// If this feature is enabled, we will gather the directory/class/method a little differently
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$segments = array();
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if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
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{
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if (isset($_GET[$this->config->item('directory_trigger')]))
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{
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$this->set_directory(trim($this->uri->_filter_uri($_GET[$this->config->item('directory_trigger')])));
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$segments[] = $this->fetch_directory();
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}
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if (isset($_GET[$this->config->item('controller_trigger')]))
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{
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$this->set_class(trim($this->uri->_filter_uri($_GET[$this->config->item('controller_trigger')])));
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$segments[] = $this->fetch_class();
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}
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if (isset($_GET[$this->config->item('function_trigger')]))
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{
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$this->set_method(trim($this->uri->_filter_uri($_GET[$this->config->item('function_trigger')])));
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$segments[] = $this->fetch_method();
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}
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}
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// Load the routes.php file.
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@include(APPPATH.'config/routes'.EXT);
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$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
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unset($route);
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// Set the default controller so we can display it in the event
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// the URI doesn't correlated to a valid controller.
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$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);
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// Were there any query string segments? If so, we'll validate them and bail out since we're done.
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if (count($segments) > 0)
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{
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return $this->_validate_request($segments);
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}
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// Fetch the complete URI string
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$this->uri->_fetch_uri_string();
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// Is there a URI string? If not, the default controller specified in the "routes" file will be shown.
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if ($this->uri->uri_string == '')
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{
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return $this->_set_default_controller();
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}
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// Do we need to remove the URL suffix?
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$this->uri->_remove_url_suffix();
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// Compile the segments into an array
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$this->uri->_explode_segments();
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// Parse any custom routing that may exist
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$this->_parse_routes();
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// Re-index the segment array so that it starts with 1 rather than 0
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$this->uri->_reindex_segments();
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}
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// --------------------------------------------------------------------
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/**
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* Set the default controller
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*
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* @access private
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* @return void
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*/
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function _set_default_controller()
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{
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if ($this->default_controller === FALSE)
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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 (strpos($this->default_controller, '/') !== FALSE)
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{
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$x = explode('/', $this->default_controller);
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$this->set_class($x[0]);
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$this->set_method($x[1]);
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$this->_set_request($x);
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}
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else
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{
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$this->set_class($this->default_controller);
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$this->set_method('index');
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$this->_set_request(array($this->default_controller, 'index'));
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}
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// re-index the routed segments array so it starts with 1 rather than 0
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$this->uri->_reindex_segments();
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log_message('debug', "No URI present. Default controller set.");
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}
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// --------------------------------------------------------------------
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/**
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* Set the Route
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*
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* This function takes an array of URI segments as
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* input, and sets the current class/method
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*
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* @access private
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* @param array
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* @param bool
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* @return void
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*/
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function _set_request($segments = array())
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{
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$segments = $this->_validate_request($segments);
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if (count($segments) == 0)
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{
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return $this->_set_default_controller();
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}
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$this->set_class($segments[0]);
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if (isset($segments[1]))
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{
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// A standard method request
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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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// This lets the "routed" segment array identify that the default
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// index method is being used.
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$segments[1] = 'index';
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}
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// Update our "routed" segment array to contain the segments.
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// Note: If there is no custom routing, this array will be
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// identical to $this->uri->segments
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$this->uri->rsegments = $segments;
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}
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// --------------------------------------------------------------------
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/**
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* Validates the supplied segments. Attempts to determine the path to
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* the controller.
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*
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* @access private
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* @param array
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* @return array
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*/
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function _validate_request($segments)
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{
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if (count($segments) == 0)
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{
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return $segments;
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}
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// Does the requested controller exist in the root folder?
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if (file_exists(APPPATH.'controllers/'.$segments[0].EXT))
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{
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return $segments;
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}
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// Is the controller in a sub-folder?
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if (is_dir(APPPATH.'controllers/'.$segments[0]))
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{
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// Set the directory and remove it from the segment array
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$this->set_directory($segments[0]);
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$segments = array_slice($segments, 1);
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if (count($segments) > 0)
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{
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// Does the requested controller exist in the sub-folder?
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if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].EXT))
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{
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show_404($this->fetch_directory().$segments[0]);
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}
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}
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else
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{
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// Is the method being specified in the route?
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if (strpos($this->default_controller, '/') !== FALSE)
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{
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$x = explode('/', $this->default_controller);
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$this->set_class($x[0]);
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$this->set_method($x[1]);
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}
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else
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{
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$this->set_class($this->default_controller);
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$this->set_method('index');
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}
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// Does the default controller exist in the sub-folder?
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if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.EXT))
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{
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$this->directory = '';
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return array();
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}
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}
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return $segments;
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}
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// If we've gotten this far it means that the URI does not correlate to a valid
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// controller class. We will now see if there is an override
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if ( ! empty($this->routes['404_override']))
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{
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$x = explode('/', $this->routes['404_override']);
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$this->set_class($x[0]);
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$this->set_method(isset($x[1]) ? $x[1] : 'index');
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return $x;
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}
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// Nothing else to do at this point but show a 404
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show_404($segments[0]);
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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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* This function matches any routes that may exist in
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* the config/routes.php file against the URI to
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* determine if the class/method need to be remapped.
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*
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* @access private
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* @return void
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*/
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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('/', $this->uri->segments);
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// Is there a literal match? If so we're done
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if (isset($this->routes[$uri]))
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{
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return $this->_set_request(explode('/', $this->routes[$uri]));
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}
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// Loop through the route array looking for wild-cards
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foreach ($this->routes as $key => $val)
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{
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// Convert wild-cards to RegEx
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$key = str_replace(':any', '.+', str_replace(':num', '[0-9]+', $key));
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// Does the RegEx match?
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if (preg_match('#^'.$key.'$#', $uri))
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{
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// Do we have a back-reference?
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if (strpos($val, '$') !== FALSE AND strpos($key, '(') !== FALSE)
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{
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$val = preg_replace('#^'.$key.'$#', $val, $uri);
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}
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return $this->_set_request(explode('/', $val));
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}
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}
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// If we got this far it means we didn't encounter a
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// matching route so we'll set the site default route
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$this->_set_request($this->uri->segments);
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}
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// --------------------------------------------------------------------
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/**
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* Set the class name
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*
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* @access public
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* @param string
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* @return void
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*/
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function set_class($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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* Fetch the current class
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*
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* @access public
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* @return string
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*/
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function fetch_class()
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{
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return $this->class;
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}
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// --------------------------------------------------------------------
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/**
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* Set the method name
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*
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* @access public
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* @param string
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* @return void
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*/
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function set_method($method)
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{
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$this->method = $method;
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}
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// --------------------------------------------------------------------
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/**
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* Fetch the current method
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*
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* @access public
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* @return string
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*/
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function fetch_method()
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{
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if ($this->method == $this->fetch_class())
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{
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return 'index';
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}
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return $this->method;
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}
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// --------------------------------------------------------------------
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/**
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* Set the directory name
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*
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* @access public
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* @param string
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* @return void
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*/
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function set_directory($dir)
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{
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$this->directory = str_replace(array('/', '.'), '', $dir).'/';
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}
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// --------------------------------------------------------------------
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/**
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* Fetch the sub-directory (if any) that contains the requested controller class
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*
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* @access public
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* @return string
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*/
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function fetch_directory()
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{
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return $this->directory;
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}
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// --------------------------------------------------------------------
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/**
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* Set the controller overrides
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*
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* @access public
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* @param array
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* @return null
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*/
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function _set_overrides($routing)
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{
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if ( ! is_array($routing))
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{
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return;
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}
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if (isset($routing['directory']))
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{
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$this->set_directory($routing['directory']);
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}
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if (isset($routing['controller']) AND $routing['controller'] != '')
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{
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$this->set_class($routing['controller']);
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}
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if (isset($routing['function']))
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{
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$routing['function'] = ($routing['function'] == '') ? 'index' : $routing['function'];
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$this->set_method($routing['function']);
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}
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}
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}
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// END Router Class
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/* End of file Router.php */
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/* Location: ./system/core/Router.php */ |