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<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Code Igniter
*
* An open source application development framework for PHP 4.3.2 or newer
*
* @package CodeIgniter
* @author Rick Ellis
* @copyright Copyright (c) 2006, pMachine, Inc.
* @license http://www.codeignitor.com/user_guide/license.html
* @link http://www.codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* Router Class
*
* Parses URIs and determines routing
*
* @package CodeIgniter
* @subpackage Libraries
* @author Rick Ellis
* @category Libraries
* @link http://www.codeigniter.com/user_guide/general/routing.html
*/
class CI_Router {
var $config;
var $uri_string = '';
var $segments = array();
var $rsegments = array();
var $routes = array();
var $class = '';
var $method = 'index';
var $directory = '';
var $uri_protocol = 'auto';
var $default_controller;
var $scaffolding_request = FALSE; // Must be set to FALSE
/**
* Constructor
*
* Runs the route mapping function.
*/
function CI_Router()
{
$this->config =& _load_class('CI_Config');
$this->_set_route_mapping();
log_message('debug', "Router Class Initialized");
}
// --------------------------------------------------------------------
/**
* Set the route mapping
*
* This function determies what should be served based on the URI request,
* as well as any "routes" that have been set in the routing config file.
*
* @access private
* @return void
*/
function _set_route_mapping()
{
// Are query strings enabled? If so we're done...
if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
{
$this->set_class($_GET[$this->config->item('controller_trigger')]);
if (isset($_GET[$this->config->item('function_trigger')]))
{
$this->set_method($_GET[$this->config->item('function_trigger')]);
}
return;
}
// Load the routes.php file and set the default controller
@include_once(APPPATH.'config/routes'.EXT);
$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
unset($route);
$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);
// Is there a URI string? If not, the default controller specified in the "routes" file will be shown.
if (($this->uri_string = $this->_get_uri_string()) == '')
{
if ($this->default_controller === FALSE)
{
show_error("Unable to determine what should be displayed. A default route has not been specified in the routing file.");
}
$this->set_class($this->default_controller);
$this->set_method('index');
log_message('debug', "No URI present. Default controller set.");
return;
}
unset($this->routes['default_controller']);
// Do we need to remove the suffix specified in the config file?
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 $this->segments array.
foreach(explode("/", preg_replace("|/*(.+?)/*$|", "\\1", $this->uri_string)) as $val)
{
// Filter segments for security
$val = trim($this->_filter_uri($val));
if ($val != '')
$this->segments[] = $val;
}
// Parse any custom routing that may exist
$this->_parse_routes();
// Re-index the segment array so that it starts with 1 rather than 0
$this->_reindex_segments();
}
// END _set_route_mapping()
// --------------------------------------------------------------------
/**
* Compile Segments
*
* This function takes an array of URI segments as
* input, and puts it into the $this->segments array.
* It also sets the current class/method
*
* @access private
* @param array
* @param bool
* @return void
*/
function _compile_segments($segments = array())
{
$segments = $this->_validate_segments($segments);
if (count($segments) == 0)
{
return;
}
$this->set_class($segments[0]);
if (isset($segments[1]))
{
// A scaffolding request. No funny business with the URL
if ($this->routes['scaffolding_trigger'] == $segments[1] AND $segments[1] != '_ci_scaffolding')
{
$this->scaffolding_request = TRUE;
unset($this->routes['scaffolding_trigger']);
}
else
{
// A standard method request
$this->set_method($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->segments
$this->rsegments = $segments;
}
// END _compile_segments()
// --------------------------------------------------------------------
/**
* Validates the supplied segments. Attempts to determine the path to
* the controller.
*
* @access private
* @param array
* @return array
*/
function _validate_segments($segments)
{
// Does the requested controller exist in the root folder?
if (file_exists(APPPATH.'controllers/'.$segments[0].EXT))
{
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
$this->set_directory($segments[0]);
$segments = array_slice($segments, 1);
if (count($segments) > 0)
{
// Does the requested controller exist in the sub-folder?
if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].EXT))
{
show_404();
}
}
else
{
$this->set_class($this->default_controller);
$this->set_method('index');
// Does the default controller exist in the sub-folder?
if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.EXT))
{
$this->directory = '';
return array();
}
}
return $segments;
}
// Can't find the requested controller...
show_404();
}
// END _validate_segments()
// --------------------------------------------------------------------
/**
* Re-index Segments
*
* This function re-indexes the $this->segment array so that it
* starts at 1 rather then 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.
*
* @access private
* @return void
*/
function _reindex_segments()
{
// Is the routed segment array different then the main segment array?
$diff = (count(array_diff($this->rsegments, $this->segments)) == 0) ? FALSE : TRUE;
$i = 1;
foreach ($this->segments as $val)
{
$this->segments[$i++] = $val;
}
unset($this->segments[0]);
if ($diff == FALSE)
{
$this->rsegments = $this->segments;
}
else
{
$i = 1;
foreach ($this->rsegments as $val)
{
$this->rsegments[$i++] = $val;
}
unset($this->rsegments[0]);
}
}
// END _reindex_segments()
// --------------------------------------------------------------------
/**
* Get the URI String
*
* @access private
* @return string
*/
function _get_uri_string()
{
if (strtoupper($this->config->item('uri_protocol')) == 'AUTO')
{
$path_info = getenv('PATH_INFO');
if ($path_info != '' AND $path_info != "/".SELF)
{
return $path_info;
}
else
{
$req_uri = $this->_parse_request_uri();
if ($req_uri != "")
{
return $req_uri;
}
else
{
$path_info = getenv('ORIG_PATH_INFO');
if ($path_info != '' AND $path_info != "/".SELF)
{
return $path_info;
}
else
{
return getenv('QUERY_STRING');
}
}
}
}
else
{
$uri = strtoupper($this->config->item('uri_protocol'));
if ($uri == 'REQUEST_URI')
{
return $this->_parse_request_uri();
}
return getenv($uri);
}
}
// END _get_uri_string()
// --------------------------------------------------------------------
/**
* Parse the REQUEST_URI
*
* Due to the way REQUEST_URI works it usually contains path info
* that makes it unusable as URI data. We'll trim off the unnecessary
* data, hopefully arriving at a valid URI that we can use.
*
* @access private
* @return string
*/
function _parse_request_uri()
{
if (($request_uri = getenv('REQUEST_URI')) == '')
{
return '';
}
$fc_path = FCPATH;
if (strpos($request_uri, '?') !== FALSE)
{
$fc_path .= '?';
}
$parsed_uri = explode("/", preg_replace("|/(.*)|", "\\1", str_replace("\\", "/", $request_uri)));
$i = 0;
foreach(explode("/", $fc_path) as $segment)
{
if ($segment == $parsed_uri[$i])
{
$i++;
}
}
$parsed_uri = implode("/", array_slice($parsed_uri, $i));
if ($parsed_uri != '')
{
$parsed_uri = '/'.$parsed_uri;
}
return $parsed_uri;
}
// END _parse_request_uri()
// --------------------------------------------------------------------
/**
* Filter segments for malicious characters
*
* @access private
* @param string
* @return string
*/
function _filter_uri($str)
{
if ($this->config->item('permitted_uri_chars') != '')
{
if ( ! preg_match("|^[".preg_quote($this->config->item('permitted_uri_chars'))."]+$|i", $str))
{
exit('The URI you submitted has disallowed characters: '.$str);
}
}
return $str;
}
// END _filter_uri()
// --------------------------------------------------------------------
/**
* Parse Routes
*
* This function matches any routes that may exist in
* the config/routes.php file against the URI to
* determine if the class/method need to be remapped.
*
* @access private
* @return void
*/
function _parse_routes()
{
// Do we even have any custom routing to deal with?
if (count($this->routes) == 0)
{
$this->_compile_segments($this->segments);
return;
}
// Turn the segment array into a URI string
$uri = implode('/', $this->segments);
$num = count($this->segments);
// Is there a literal match? If so we're done
if (isset($this->routes[$uri]))
{
$this->_compile_segments(explode('/', $this->routes[$uri]));
return;
}
// Loop through the route array looking for wildcards
foreach (array_slice($this->routes, 1) as $key => $val)
{
// Convert wildcards to RegEx
$key = str_replace(':any', '.+', str_replace(':num', '[0-9]+', $key));
// Does the RegEx match?
if (preg_match('#^'.$key.'$#', $uri))
{
// Do we have a back-reference?
if (strpos($val, '$') !== FALSE AND strpos($key, '(') !== FALSE)
{
$val = preg_replace('#^'.$key.'$#', $val, $uri);
}
$this->_compile_segments(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
$this->_compile_segments($this->segments);
}
// END set_method()
// --------------------------------------------------------------------
/**
* Set the class name
*
* @access public
* @param string
* @return void
*/
function set_class($class)
{
$this->class = $class;
}
// END set_class()
// --------------------------------------------------------------------
/**
* Fetch the current class
*
* @access public
* @return string
*/
function fetch_class()
{
return $this->class;
}
// END fetch_class()
// --------------------------------------------------------------------
/**
* Set the method name
*
* @access public
* @param string
* @return void
*/
function set_method($method)
{
$this->method = $method;
}
// END set_method()
// --------------------------------------------------------------------
/**
* Fetch the current method
*
* @access public
* @return string
*/
function fetch_method()
{
return $this->method;
}
// END fetch_method()
// --------------------------------------------------------------------
/**
* Set the directory name
*
* @access public
* @param string
* @return void
*/
function set_directory($dir)
{
$this->directory = $dir.'/';
}
// END set_directory()
// --------------------------------------------------------------------
/**
* Fetch the sub-directory (if any) that contains the requested controller class
*
* @access public
* @return string
*/
function fetch_directory()
{
return $this->directory;
}
// END fetch_directory()
}
// END Router Class
?>