Async - Code Search

tests/test_http_connection_injection.py

from starlette.websockets import WebSocket

app = FastAPI()
app.state.value = 42


async def extract_value_from_http_connection(conn: HTTPConnection):
    return conn.app.state.value


@app.get("/http")
async def get_value_by_http(value: int = Depends(extract_value_from_http_connection)):
    return value


@app.websocket("/ws")
async def get_value_by_ws(

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Sun Aug 09 13:56:41 GMT 2020

- 972 bytes

- Click Count (0)

github.com/tiangolo/fastapi

docs_src/bigger_applications/app_an_py310/routers/items.py

    responses={404: {"description": "Not found"}},
)


fake_items_db = {"plumbus": {"name": "Plumbus"}, "gun": {"name": "Portal Gun"}}


@router.get("/")
async def read_items():
    return fake_items_db


@router.get("/{item_id}")
async def read_item(item_id: str):
    if item_id not in fake_items_db:
        raise HTTPException(status_code=404, detail="Item not found")

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

- 1011 bytes

- Click Count (0)

github.com/tiangolo/fastapi

docs_src/custom_request_and_route/tutorial003_py310.py

            return response

        return custom_route_handler


app = FastAPI()
router = APIRouter(route_class=TimedRoute)


@app.get("/")
async def not_timed():
    return {"message": "Not timed"}


@router.get("/timed")
async def timed():
    return {"message": "It's the time of my life"}

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Wed Dec 10 08:55:32 GMT 2025

- 1K bytes

- Click Count (0)

github.com/tiangolo/fastapi

tests/test_annotated.py

from inline_snapshot import snapshot

app = FastAPI()


@app.get("/default")
async def default(foo: Annotated[str, Query()] = "foo"):
    return {"foo": foo}


@app.get("/required")
async def required(foo: Annotated[str, Query(min_length=1)]):
    return {"foo": foo}


@app.get("/multiple")
async def multiple(foo: Annotated[str, object(), Query(min_length=1)]):
    return {"foo": foo}

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Sun Feb 08 10:18:38 GMT 2026

- 10.5K bytes

- Click Count (0)

github.com/tiangolo/fastapi

tests/test_dependency_overrides.py

app = FastAPI()

router = APIRouter()


async def common_parameters(q: str, skip: int = 0, limit: int = 100):
    return {"q": q, "skip": skip, "limit": limit}


@app.get("/main-depends/")
async def main_depends(commons: dict = Depends(common_parameters)):
    return {"in": "main-depends", "params": commons}


@app.get("/decorator-depends/", dependencies=[Depends(common_parameters)])
async def decorator_depends():

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Tue Feb 17 09:59:14 GMT 2026

- 11.2K bytes

- Click Count (0)

github.com/tiangolo/fastapi

docs_src/generate_clients/tutorial002_py310.py

async def create_item(item: Item):
    return {"message": "Item received"}


@app.get("/items/", response_model=list[Item], tags=["items"])
async def get_items():
    return [
        {"name": "Plumbus", "price": 3},
        {"name": "Portal Gun", "price": 9001},
    ]


@app.post("/users/", response_model=ResponseMessage, tags=["users"])
async def create_user(user: User):

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

- 730 bytes

- Click Count (0)

github.com/tiangolo/fastapi

fastapi/.agents/skills/fastapi/references/streaming.md

# Streaming

## Stream JSON Lines

To stream JSON Lines, declare the return type and use `yield` to return the data.

```python
@app.get("/items/stream")
async def stream_items() -> AsyncIterable[Item]:
    for item in items:
        yield item
```

## Server-Sent Events (SSE)

To stream Server-Sent Events, use `response_class=EventSourceResponse` and `yield` items from the endpoint.

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Sun Mar 01 10:05:57 GMT 2026

- 2.5K bytes

- Click Count (0)

github.com/tiangolo/fastapi

docs_src/request_files/tutorial002_an_py310.py

app = FastAPI()


@app.post("/files/")
async def create_files(files: Annotated[list[bytes], File()]):
    return {"file_sizes": [len(file) for file in files]}


@app.post("/uploadfiles/")
async def create_upload_files(files: list[UploadFile]):
    return {"filenames": [file.filename for file in files]}


@app.get("/")
async def main():
    content = """
<body>

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

- 826 bytes

- Click Count (0)

github.com/tiangolo/fastapi

docs_src/security/tutorial004_an_py310.py

    if user is None:
        raise credentials_exception
    return user


async def get_current_active_user(
    current_user: Annotated[User, Depends(get_current_user)],
):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login_for_access_token(
    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 18:10:35 GMT 2026

- 4.2K bytes

- Click Count (0)

github.com/tiangolo/fastapi

docs_src/request_files/tutorial003_an_py310.py

from fastapi.responses import HTMLResponse

app = FastAPI()


@app.post("/files/")
async def create_files(
    files: Annotated[list[bytes], File(description="Multiple files as bytes")],
):
    return {"file_sizes": [len(file) for file in files]}


@app.post("/uploadfiles/")
async def create_upload_files(
    files: Annotated[
        list[UploadFile], File(description="Multiple files as UploadFile")

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

- 952 bytes

- Click Count (0)

Search Options