# Create Custom Middleware

To write custom middleware for this framework, one has to make sure the API constraint is satisfied. The recommended way to create middleware is to extend the `sirJuni\Framework\Middleware\Middleware` class, which is an abstract class with 2 methods.

1. `set_fallback_route($route)` : This method is used to configure a fallback route, to which a redirect is caused when the constraints in middleware fail. To save `$route` we have to make a static variable to store it.
2. `handle($request)` : This method is used by the `Router` to give the Middleware control of the request. So, this serves as an entry point into the middleware and it would be useless to create a middleware without this method.

A code example of creating a middleware would be

```php
use sirJuni\Framework\Middleware\Middleware;

class CheckStat extends Middleware {
    static $route;
    
    public static function set_fallback_route($route) {
        self::$route = $route;
    }
    
    // only serve the page if '/' is visited
    public static function handle($request) {
        if ($request->url() == '/') {
            return TRUE;   // return true on success
        }
        else {
            HelperFuncs::redirect(self::$route);  // cause redirect on failure
        }
    }
}
```

The `handle($request)` function should return `TRUE` if conditions meet, otherwise just cause a redirect to fallback\_route.