FastApi - Code Search

tests/test_dependency_cache.py

from fastapi import Depends, FastAPI, Security
from fastapi.testclient import TestClient

app = FastAPI()

counter_holder = {"counter": 0}


async def dep_counter():
    counter_holder["counter"] += 1
    return counter_holder["counter"]


async def super_dep(count: int = Depends(dep_counter)):
    return count


@app.get("/counter/")
async def get_counter(count: int = Depends(dep_counter)):
    return {"counter": count}

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Tue Aug 23 13:30:24 GMT 2022

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github.com/tiangolo/fastapi

docs_src/websockets/tutorial002_an_py39.py

from typing import Annotated, Union

from fastapi import (
    Cookie,
    Depends,
    FastAPI,
    Query,
    WebSocket,
    WebSocketException,
    status,
)
from fastapi.responses import HTMLResponse

app = FastAPI()

html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sat Mar 18 12:29:59 GMT 2023

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github.com/tiangolo/fastapi

docs_src/header_param_models/tutorial003_py39.py

from typing import Union

from fastapi import FastAPI, Header
from pydantic import BaseModel

app = FastAPI()


class CommonHeaders(BaseModel):
    host: str
    save_data: bool
    if_modified_since: Union[str, None] = None
    traceparent: Union[str, None] = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: CommonHeaders = Header(convert_underscores=False)):

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sun Mar 23 20:48:54 GMT 2025

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github.com/tiangolo/fastapi

docs_src/dependencies/tutorial001_py310.py

from fastapi import Depends, FastAPI

app = FastAPI()


async def common_parameters(q: str | None = None, skip: int = 0, limit: int = 100):
    return {"q": q, "skip": skip, "limit": limit}


@app.get("/items/")
async def read_items(commons: dict = Depends(common_parameters)):
    return commons


@app.get("/users/")
async def read_users(commons: dict = Depends(common_parameters)):

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Fri Jan 07 14:11:31 GMT 2022

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github.com/tiangolo/fastapi

docs_src/header_param_models/tutorial003_an_py39.py

from typing import Annotated, Union

from fastapi import FastAPI, Header
from pydantic import BaseModel

app = FastAPI()


class CommonHeaders(BaseModel):
    host: str
    save_data: bool
    if_modified_since: Union[str, None] = None
    traceparent: Union[str, None] = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(
    headers: Annotated[CommonHeaders, Header(convert_underscores=False)],
):

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sun Mar 23 20:48:54 GMT 2025

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github.com/tiangolo/fastapi

docs/zh/docs/how-to/configure-swagger-ui.md

你可以配置一些额外的 <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">Swagger UI 参数</a>.

如果需要配置它们，可以在创建 `FastAPI()` 应用对象时或调用 `get_swagger_ui_html()` 函数时传递 `swagger_ui_parameters` 参数。

`swagger_ui_parameters` 接受一个直接传递给 Swagger UI的字典，包含配置参数键值对。

FastAPI会将这些配置转换为 **JSON**，使其与 JavaScript 兼容，因为这是 Swagger UI 需要的。

## 不使用语法高亮

比如，你可以禁用 Swagger UI 中的语法高亮。

当没有改变设置时，语法高亮默认启用：

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Mon Nov 18 02:25:44 GMT 2024

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github.com/tiangolo/fastapi

docs_src/body_nested_models/tutorial003_py39.py

from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None
    tags: set[str] = set()


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item):
    results = {"item_id": item_id, "item": item}

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sat May 14 11:59:59 GMT 2022

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github.com/tiangolo/fastapi

docs_src/dependencies/tutorial011_an_py39.py

from typing import Annotated

from fastapi import Depends, FastAPI

app = FastAPI()


class FixedContentQueryChecker:
    def __init__(self, fixed_content: str):
        self.fixed_content = fixed_content

    def __call__(self, q: str = ""):
        if q:
            return self.fixed_content in q
        return False


checker = FixedContentQueryChecker("bar")


@app.get("/query-checker/")

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sat Mar 18 12:29:59 GMT 2023

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github.com/tiangolo/fastapi

docs_src/path_params_numeric_validations/tutorial001_an_py39.py

from typing import Annotated, Union

from fastapi import FastAPI, Path, Query

app = FastAPI()


@app.get("/items/{item_id}")
async def read_items(
    item_id: Annotated[int, Path(title="The ID of the item to get")],
    q: Annotated[Union[str, None], Query(alias="item-query")] = None,
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sat Mar 18 12:29:59 GMT 2023

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github.com/tiangolo/fastapi

docs/fr/docs/index.md

# FastAPI

<style>
.md-content .md-typeset h1 { display: none; }
</style>

<p align="center">
  <a href="https://fastapi.tiangolo.com"><img src="https://fastapi.tiangolo.com/img/logo-margin/logo-teal.png" alt="FastAPI"></a>
</p>
<p align="center">
    Framework FastAPI, haute performance, facile à apprendre, rapide à coder, prêt pour la production
</p>
<p align="center">

Created: Sun Dec 28 07:19:09 GMT 2025

- Last Modified: Sat Oct 11 17:48:49 GMT 2025

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