Introduce custom attributes for Responses

[shyim]

Description
The request object have attributes property where application can save custom informations. This possibility is missing on responses. (https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpFoundation/Request.php#L74)

I am migrating currently a project that uses ZF1 Request and Response object. The Response object has a method to set exceptions to this Response. Since I want to replace only the Request and Response object I have to support that also as Response object from the HttpFoundation.

So my idea was to add that property also to the Response object

I would also create a PR for that :)

Example

$response= new Response();
$response->attributes->set('something', true);

[stof]

What would be the use case for that ?

[shyim]

To store custom informations like exceptions occurred in this request response cycle (Who don't use the complete Symfony Framework)

[ro0NL]

Do you really need to use Symfony Response for that? I'm not sure it's valid just because Zend Response does it.

The Response object has a method to set exceptions to this Response.

ZF will handle it as such i assume? Symfony has no such concept, so i'm not sure what you're expecting?

If it's just to transfer attribtues/anything, i don't think you need the Response object for that per se. Or at least i dont think core should provide something for that.

[fabpot]

The Response is probably not the right class to store additional information.