else:
        BodyFieldInfo = params.Body

        body_param_media_types = [
            f.field_info.media_type
            for f in flat_dependant.body_params
            if isinstance(f.field_info, params.Body)
        ]
        if len(set(body_param_media_types)) == 1:
            BodyFieldInfo_kwargs["media_type"] = body_param_media_types[0]
    final_field = create_response_field(
        name="body",

from fastapi import FastAPI
from fastapi.responses import JSONResponse
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class JsonApiResponse(JSONResponse):
    media_type = "application/vnd.api+json"


class Error(BaseModel):
    status: str
    title: str


class JsonApiError(BaseModel):
    errors: typing.List[Error]


@app.get(
    "/a/{id}",

                transformer.setOutputProperty(OutputKeys.INDENT, "yes")
            }
            transformer.setOutputProperty(OutputKeys.METHOD, "xml")
            transformer.setOutputProperty(OutputKeys.MEDIA_TYPE, "text/xml")
            transformer.transform(new DOMSource(root), new StreamResult(stream))
        }
    }

    Document getDocument() {
        root
    }

scroll;\n}\n\n.container {\n  width: 100%;\n  padding-right: 7.5px;\n  padding-left: 7.5px;\n  margin-right: auto;\n  margin-left: auto;\n}\n\n@media (min-width: 576px) {\n  .container {\n    max-width: 540px;\n  }\n}\n\n@media (min-width: 768px) {\n  .container {\n    max-width: 720px;\n  }\n}\n\n@media (min-width: 992px) {\n  .container {\n    max-width: 960px;\n  }\n}\n\n@media (min-width: 1200px) {\n  .container {\n    max-width: 1140px;\n  }\n}\n\n.container-fluid {\n  width: 100%;\n  padding-right: 7.5px;\n...

**FastAPI** will make sure to read that data from the right place instead of JSON.

!!! note "Technical Details"
    Data from forms is normally encoded using the "media type" `application/x-www-form-urlencoded`.

    But when the form includes files, it is encoded as `multipart/form-data`. You'll read about handling files in the next chapter.

          its terms and conditions.

       3. Term. The term of this Public License is specified in Section
          6(a).

       4. Media and formats; technical modifications allowed. The
          Licensor authorizes You to exercise the Licensed Rights in
          all media and formats whether now known or hereafter created,
          and to make technical modifications necessary to do so. The

* `status_code` – Ein `int`-HTTP-Statuscode.
* `headers` – Ein `dict` von Strings.
* `media_type` – Ein `str`, der den Medientyp angibt. Z. B. `"text/html"`.

FastAPI (eigentlich Starlette) fügt automatisch einen Content-Length-Header ein. Außerdem wird es einen Content-Type-Header einfügen, der auf dem media_type basiert, und für Texttypen einen Zeichensatz (charset) anfügen.

```Python hl_lines="1  18"

        "The TID specified was invalid.", "The handle is invalid.", "The network name cannot be found.",
        "Not enough storage is available to process this command.", "The media is write protected.", "The device is not ready.",
        "A device attached to the system is not functioning.", "A device attached to the system is not functioning.",

    * `Path()`
    * `Query()`
    * `Header()`
    * `Cookie()`
* <a href="https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#media-type-object" class="external-link" target="_blank">`Request Body Object` im Feld `content` des `Media Type Object`s (in der Spezifikation)</a>, das verwendet wurde von FastAPIs:
    * `Body()`
    * `File()`
    * `Form()`

!!! info

    * `Path()`
    * `Query()`
    * `Header()`
    * `Cookie()`
* <a href="https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#media-type-object" class="external-link" target="_blank">`Request Body Object`, in the field `content`, on the `Media Type Object` (in the specification)</a> that was used by FastAPI's:
    * `Body()`
    * `File()`
    * `Form()`

!!! info