How can i add TrimString Middleware in laravel 5.3? - laravel

Question

Just came to know that Laravel 5.4 has an awesome feature TrimString, which removes the white spaces from any input. I want this middleware in my 5.3 project, any idea how to do that?
I just copied the middleware from GitHub repo of Laravel but it is not working.
Thanks

Answer 1

If you want to use this feature in Laravel 5.3.
Add these two classes into your App\Http\Middleware
https://github.com/laravel/framework/blob/5.4/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php
https://github.com/laravel/laravel/blob/master/app/Http/Middleware/TrimStrings.php
Updating it's namespace to App\Http\middleware.
Like:
TransformsRequest.php
namespace App\Http\Middleware;
use Closure;
use Symfony\Component\HttpFoundation\ParameterBag;
class TransformsRequest
{
/**
* The additional attributes passed to the middleware.
*
* #var array
*/
protected $attributes = [];
/**
* Handle an incoming request.
*
* #param \Illuminate\Http\Request $request
* #param \Closure $next
* #return mixed
*/
public function handle($request, Closure $next, ...$attributes)
{
$this->attributes = $attributes;
$this->clean($request);
return $next($request);
}
/**
* Clean the request's data.
*
* #param \Illuminate\Http\Request $request
* #return void
*/
protected function clean($request)
{
$this->cleanParameterBag($request->query);
$this->cleanParameterBag($request->request);
if ($request->isJson()) {
$this->cleanParameterBag($request->json());
}
}
/**
* Clean the data in the parameter bag.
*
* #param \Symfony\Component\HttpFoundation\ParameterBag $bag
* #return void
*/
protected function cleanParameterBag(ParameterBag $bag)
{
$bag->replace($this->cleanArray($bag->all()));
}
/**
* Clean the data in the given array.
*
* #param array $data
* #return array
*/
protected function cleanArray(array $data)
{
return collect($data)->map(function ($value, $key) {
return $this->cleanValue($key, $value);
})->all();
}
/**
* Clean the given value.
*
* #param string $key
* #param mixed $value
* #return mixed
*/
protected function cleanValue($key, $value)
{
if (is_array($value)) {
return $this->cleanArray($value);
}
return $this->transform($key, $value);
}
/**
* Transform the given value.
*
* #param string $key
* #param mixed $value
* #return mixed
*/
protected function transform($key, $value)
{
return $value;
}
}
TrimStrings.php
namespace App\Http\Middleware;
class TrimStrings extends TransformsRequest
{
/**
* The attributes that should not be trimmed.
*
* #var array
*/
protected $except = [
//
];
/**
* Transform the given value.
*
* #param string $key
* #param mixed $value
* #return mixed
*/
protected function transform($key, $value)
{
if (in_array($key, $this->except)) {
return $value;
}
return is_string($value) ? trim($value) : $value;
}
}
And add into your App\Http\Kernel.php
protected $middleware = [
\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
\App\Http\Middleware\TransformsRequest::class,
\App\Http\Middleware\TrimStrings::class,
];
To use it just use:
dd(request('email'));
More on it:
https://laravel-news.com/laravel-5-4-middleware