Add support for raw body

[lainosantos]

Add support for raw_body config implemented at roadrunner-server/http#45

I did not identify any BC making parse of the raw body when it is not empty. Do you see any?

[roxblnfk]

I'm not sure that is a good idea

[lainosantos]

Hi, @roxblnfk.

The inclusion of this configuration was discussed a lot on the RoadRunner side (roadrunner-server/roadrunner#1264) and I believe that implementing it in this package will bring the same possibility of use: For some cases it is necessary to get the body without any modification. Enabling raw_body setting will only send the body untouched when the content-type is application/x-www-form-urlencoded. I modified this PR so that it parses raw body only when the content-type is application/x-www-form-urlencoded. Without this PR, when the raw_body setting is enabled, the POST request fields cannot be accessed through the ServerRequestInterface::getParsedBody method, as is determined by PSR-7. One use case is when you need to get the body untouched to calculate the body's validation hash and still need to access the body's fields.

[lainosantos]

I changed this PR e rebased the main branch to minimize side effects, please review it again.

[roxblnfk]

I think it should be responsibility of a PHP middleware.
If you use row_body flag (rare case) you can use a custom middleware to handle it.

[lainosantos]

Yes, it may be a PHP middleware, but I think that is great if this package support it as it's a roadrunner's feature.

[lainosantos]

Another detail is that in PHP Middleware the request class will already be a PSR-7, there will not be the \Spiral\RoadRunner\Http\Request::$parsed property, which is necessary to decide whether to convert the body.

[butschster]

Another detail is that in PHP Middleware the request class will already be a PSR-7, there will not be the \Spiral\RoadRunner\Http\Request::$parsed property, which is necessary to decide whether to convert the body.

Hm. Probably it can be solved with passing parsed property to the request attributes

[lainosantos]

@butschster I made the change in PR to only add a resquest attribute

[roxblnfk]

Attributed value looks better 👍

1. The literal should be replaced with a public constant
2. I think the key should contain some prefix like rr_ or roadrunner. @butschster WDYT?

[lainosantos]

@roxblnfk, PR adjusted. 😉

[butschster]

Thank you @lainosantos for the contribution!