REST framework's `Request` class extends the standard `HttpRequest`, adding support for parsing multiple content types, allowing browser-based `PUT`, `DELETE` and other methods, and adding flexible per-request authentication.
`request.DATA` returns the parsed content of the request body. This is similar to the standard `HttpRequest.POST` attribute except that:
1. It supports parsing the content of HTTP methods other than `POST`, meaning that you can access the content of `PUT` and `PATCH` requests.
2. It supports parsing multiple content types, rather than just form data. For example you can handle incoming json data in the same way that you handle incoming form data.
`request.FILES` returns any uploaded files that may be present in the content of the request body. This is the same as the standard `HttpRequest` behavior, except that the same flexible request parsing that is used for `request.DATA`.
This allows you to support file uploads from multiple content-types. For example you can write a parser that supports `POST`ing the raw content of a file, instead of using form-encoded file uploads.
`request.auth` returns any additional authentication context that may not be contained in `request.user`. The exact behavior of `request.auth` depends on what authentication has been set in `request.authentication`. For many types of authentication this will simply be `None`, but it may also be an object representing a permission scope, an expiry time, or any other information that might be contained in a token-based authentication scheme.
