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Routing to specific controller in case controller/method is not found.

#11
(09-28-2015, 05:51 AM)Martin7483 Wrote: Hi,

I see you have found a solution. Should you still be interested in using a catch all controller I have been able to extend the core Router class to make use of this option.

Add the following line to your routes.php config file in ./application/config
PHP Code:
$route['catchall_controller'] = 'your_catch_all'

Copy MY_Router.php and add it to your ./application/core directory
PHP Code:
<?php  if (! defined('BASEPATH')) exit('No direct script access allowed');

/**
 * My Router
 *
 * This class extends the Crossfire core Router. It adds a catch all
 * controller for routing DB pages
 *
 * @author  Martin Langenberg
 */

 
class MY_Router extends CI_Router {
 
 
/**
  * Catchall controller
  *
  * @var string
  */
 
public $catchall_controller;
 
 
    public function __construct() {
 
        log_message('debug'"Class ".get_class($this)." Initialized.");
 
 
        parent::__construct();
 }
 
 
/**
  * 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()
 {
 
    // 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;
 
    }
 
 
    // Load the routes.php file.
 
    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'];
 
        // Set the catch all controller
 
        isset($route['catchall_controller']) && $this->catchall_controller $route['catchall_controller'];
 
        isset($route['translate_uri_dashes']) && $this->translate_uri_dashes $route['translate_uri_dashes'];
 
        unset($route['default_controller'], $route['translate_uri_dashes'], $route['catchall_controller']);
 
        $this->routes $route;
 
    }
 
 
    // 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';
 
    }
 
 
    // Check if a valid controller is set, else call the catchall
 
    if( ! $this->_is_controller($segments[0]) ) {
 
        $this->_set_catchall_controller();
 
        return;
 
    }

 
    array_unshift($segmentsNULL);
 
    unset($segments[0]);
 
    $this->uri->rsegments $segments;
 }
 
 
/**
  * Set default controller
  *
  * @return void
  */
 
protected function _set_catchall_controller()
 {
 
    // Catch all controller empty? Set the default controller
 
    if (empty($this->catchall_controller))
 
    {
 
        $this->_set_default_controller();
 
    }
 
 
    // Is the method being specified?
 
    if (sscanf($this->catchall_controller'%[^/]/%s'$class$method) !== 2)
 
    {
 
        $method 'index';
 
    }
 
 
    if ( ! file_exists(APPPATH.'controllers/'.$this->directory.ucfirst($class).'.php'))
 
    {
 
        // No file found for the catch all controller
 
        $this->_set_default_controller();
 
    }
 
 
    $this->set_class($class);
 
    $this->set_method($method);
 
 
    // Assign routed segments, index starting from 1
 
    $this->uri->rsegments = array(
 
        1 => $class,
 
        2 => $method,
 
        3 => implode('/'$this->uri->segments)
 
        );
 
 
    log_message('debug'"No matching controller. Catch all controller {$this->catchall_controller} set.");
 }
 
 protected function 
_is_controller($controller) {
 
    $dir realpath(APPPATH.'controllers/'.$this->directory);
 
 
    if( ! file_exists(realpath($dir.'/'.$controller.'.php')) ) {
 
        // Clear, or set the directory for the use of the catchall controller
 
        $this->set_directory(NULL);
 
        return FALSE;
 
    }
 
 
    return TRUE;
 }
 




This is great approach. May I ask, how can I use this by catching the request then parsing the first characters then redirect to the url?
Example:
[Routes]
$route['history'] = 'HistoryController/index';

This URL:
http://mysite.com/USERNAME/history

will be like http://mysite.com/history


Please note that USERNAME is the username of logged user.


Thank you
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#12
@isystem20 Note that the original post is from 2015, and likely out of date.
One thing in CI3, compared to CI2, is that your controller names need to be UCfirst, i.e. Historycontroller vs HistoryController.

Another point: in no case do we condone hacking any of the files in system/.
If you want to change their behavior, then extend them instead, in core/.
Reply

#13
For what he is trying to do maybe use a __remap method
What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )
Reply

#14
$route['(:any)'] = 'page/view/$1';

you have not use directly $route['(:any)'] its all request owerrited
inserted you can use alternatively $route['blog_details/(:any)'] = 'page/view/$1'
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