【web】Fastapi自动生成接口文档（Swagger、ReDoc ）

简介

FastAPI是流行的Python web框架，适用于开发高吞吐量API和微服务（直接支持异步编程）

FastAPI的优势之一：通过提供高级抽象和自动数据模型转换，简化请求数据的处理（用户不需要手动处理原始请求数据），并能根据路由和 Pydantic 模型自动生成 OpenAPI 接口文档。

• Swagger UI
• ReDoc

demo

import uuid
import uvicorn
from typing import Any, Union, Optional
from typing_extensions import Literal
from fastapi import Body, FastAPI
from pydantic import(
    BaseModel,
    Field,
    UUID4
)
app = FastAPI()classUserIn(BaseModel):
    channel: Literal[0,1]= Field(0, title="渠道")
    username:str= Field(..., title="用户名")
    password:str= Field(..., title="用户密码", description="长度6-8位")
    email:str= Field(..., title="用户邮箱地址")
    full_name:str= Field(None, title="用户全名")
    request_id: Optional[UUID4]classUserOut(BaseModel):
    username:str= Field(..., title="用户名")
    email:str= Field(..., title="用户邮箱地址")
    full_name:str= Field(None, title="用户全名")
    request_id: Optional[UUID4]# FastAPI will take care of filtering out all the data that is not declared in the output model (using Pydantic).# 因此，FastAPI将负责过滤掉输出模型中未声明的所有数据（使用Pydantic）。@app.post("/user/", response_model=UserOut)asyncdefcreate_user(
        user: UserIn = Body(
            examples={"example1":{"summary":"A short summary or description of the example","value":{# example data here"channel":0,"username":"Foo","password":"33759","email":"chencare@163.com","full_name":"xiaotao"}}}))-> UserOut:
    user.request_id = uuid.uuid4()print(user.request_id)return user
if __name__ =='__main__':
    uvicorn.run(app=app, access_log=True, port=9988)

运行后，会提示

Uvicorn running on http://127.0.0.1:9988 (Press CTRL+C to quit)

在浏览器输入

http://127.0.0.1:9988/redoc

（ ReDoc）,

http://127.0.0.1:9988/docs

（Swagger UI ）即可查看

ReDoc 页面如下：

ReDoc vs. Swagger UI

ReDoc更美观，Swagger UI更注重交互（用户直接从界面中发送请求，查看响应，这对于测试和调试 API 非常有用。）