- iter_bytes
            - iter_json
            - send_text
            - send_bytes
            - send_json
            - close

When a client disconnects, a `WebSocketDisconnect` exception is raised, you can catch it.

You can import it directly form `fastapi`:

```python
from fastapi import WebSocketDisconnect
```

::: fastapi.WebSocketDisconnect

## WebSockets - additional classes

Des changements sur Pydantic ont même été faits pour supporter cela.

Les captures d'écrans précédentes ont été prises sur <a href="https://code.visualstudio.com" class="external-link" target="_blank">Visual Studio Code</a>.

                "name": "ContentSizeLimitExceeded",
                "code": 999,
                "message": "File limit exceeded",
            }
        }


def test_custom_middleware_exception_not_raised(tmp_path: Path):
    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")

    with client:
        with open(path, "rb") as file:
            response = client.post("/middleware", files={"file": file})

But Facebook login doesn't support OpenID Connect. It has its own flavor of OAuth2.

### OpenID (not "OpenID Connect")

There was also an "OpenID" specification. That tried to solve the same thing as **OpenID Connect**, but was not based on OAuth2.

So, it was a complete additional system.

It is not very popular or used nowadays.

## OpenAPI