Update Request.zep

[zikezhang]

The Http request service cannot invoke filterService from container.

Hello!

• Type: bug fix
• Link to issue:
  based on the documentation there: https://docs.phalcon.io/5.0/en/request#preset-sanitizers
  I implemented sanitizers on my Http request service with the following code:

public function register(DiInterface $di) : void
    {
        $di->setShared($this->serviceName, function () {
            $request = new Request();
            $request->setParameterFilters(
                        'id',[\Phalcon\Filter\Filter::FILTER_ABSINT],['post']
                    )
                    ->setParameterFilters(
                        'title',
                        [
                            \Phalcon\Filter\Filter::FILTER_TRIM,
                            \Phalcon\Filter\Filter::FILTER_STRIPTAGS
                        ],
                        ['post']
                    )
                    ->setParameterFilters(
                        'email',
                        [
                            \Phalcon\Filter\Filter::FILTER_EMAIL,
                            \Phalcon\Filter\Filter::FILTER_TRIM
                        ],
                        ['post']
                    )
            ;
            return $request;
        });
    }

And then, i got an exception message, which means the DI container is null

"A dependency injection container is required to access the 'filter' service"

in this case, I have updated getFilterService() so that the Request Service can invoke system Filter properly.

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR

Thanks
Zike

[niden]

@zikezhang Are you using Di or FactoryDefault for your container?

[zikezhang]

Hi @niden , I am using Phalcon\Di\FactoryDefault for the Http container.

[zikezhang]

I am wondering if we can rename private filterService = null; to private filter = null; like it's in the Cookie component.