fastapi/docs/advanced/response-cookies.md
Sebastián Ramírez 0ac9b3ee5c
Re-export utils from Starlette (#1064)
*  Re-export main features used from Starlette to simplify developer's code

* ♻️ Refactor Starlette exports

* ♻️ Refactor tutorial examples to use re-exported utils from Starlette

* 📝 Add examples for all middlewares

* 📝 Add new docs for middlewares

* 📝 Add examples for custom responses

* 📝 Extend docs for custom responses

* 📝 Update docs and add notes explaining re-exports from Starlette everywhere

* 🍱 Update screenshot for HTTP status

* 🔧 Update MkDocs config with new content

* ♻️ Refactor tests to use re-exported utils from Starlette

*  Re-export WebSocketDisconnect from Starlette for tests

*  Add extra tests for extra re-exported middleware

*  Add tests for re-exported responses from Starlette

*  Add docs about mounting WSGI apps

*  Add Flask as a dependency to test WSGIMiddleware

*  Test WSGIMiddleware example
2020-03-01 21:49:20 +01:00

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## Use a `Response` parameter
You can declare a parameter of type `Response` in your *path operation function*.
And then you can set cookies in that *temporal* response object.
```Python hl_lines="1 8 9"
{!./src/response_cookies/tutorial002.py!}
```
And then you can return any object you need, as you normally would (a `dict`, a database model, etc).
And if you declared a `response_model`, it will still be used to filter and convert the object you returned.
**FastAPI** will use that *temporal* response to extract the cookies (also headers and status code), and will put them in the final response that contains the value you returned, filtered by any `response_model`.
You can also declare the `Response` parameter in dependencies, and set cookies (and headers) in them.
## Return a `Response` directly
You can also create cookies when returning a `Response` directly in your code.
To do that, you can create a response as described in [Return a Response Directly](response-directly.md){.internal-link target=_blank}.
Then set Cookies in it, and then return it:
```Python hl_lines="10 11 12"
{!./src/response_cookies/tutorial001.py!}
```
!!! tip
Have in mind that if you return a response directly instead of using the `Response` parameter, FastAPI will return it directly.
So, you will have to make sure your data is of the correct type. E.g. it is compatible with JSON, if you are returning a `JSONResponse`.
And also that you are not sending any data that should have been filtered by a `response_model`.
### More info
!!! note "Technical Details"
You could also use `from starlette.responses import Response` or `from starlette.responses import JSONResponse`.
**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.
And as the `Response` can be used frequently to set headers and cookies, **FastAPI** also provides it at `fastapi.Response`.
To see all the available parameters and options, check the <a href="https://www.starlette.io/responses/#set-cookie" class="external-link" target="_blank">documentation in Starlette</a>.