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chapter08.py

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chapter08.py

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#!/usr/bin/python3
# -*- coding:utf-8 -*-
# __author__ = '__Jack__'
from typing import Optional
from fastapi import APIRouter, BackgroundTasks, Depends
app08 = APIRouter()
"""【见run.py】Middleware 中间件"""
# 注：带yield的依赖的退出部分的代码 和 后台任务 会在中间件之后运行
"""【见run.py】CORS (Cross-Origin Resource Sharing) 跨源资源共享"""
# 域的概念：协议+域名+端口
"""Background Tasks 后台任务"""
def bg_task(framework: str):
with open("README.md", mode="a") as f:
f.write(f"## {framework} 框架精讲")
@app08.post("/background_tasks")
async def run_bg_task(framework: str, background_tasks: BackgroundTasks):
"""
:param framework: 被调用的后台任务函数的参数
:param background_tasks: FastAPI.BackgroundTasks
:return:
"""
background_tasks.add_task(bg_task, framework)
return {"message": "任务已在后台运行"}
def continue_write_readme(background_tasks: BackgroundTasks, q: Optional[str] = None):
if q:
background_tasks.add_task(bg_task, "\n> 整体的介绍 FastAPI，快速上手开发，结合 API 交互文档逐个讲解核心模块的使用\n")
return q
@app08.post("/dependency/background_tasks")
async def dependency_run_bg_task(q: str = Depends(continue_write_readme)):
if q:
return {"message": "README.md更新成功"}
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