fastapi 基本部署使用

基本包：

在centos7.6 下，安装了python3.8 版本，同时与python2 共存，因此安装fastapi的时候，应该使用pip3 进行安装

安装的模块：

pip3 install fastapi pip3 install uvicron pip3 install gunicorn #管理uvicron应用

基本main.py 文件

[root@iZh pytest]# cat main.py from fastapi import FastAPI import uvicorn app = FastAPI() @app.get("/") def read_root(): return {"message":"ok"} if __name__=='__main__': uvicorn.run(app='main:app',host="127.0.0.1",port=8000,reload=True,debug=True)

启动

python3 main.py 默认python为2的版本，系统自带不支持 [root@iZh pytest]# python main.py Traceback (most recent call last): File "main.py", line 1, in <module> from fastapi import FastAPI ImportError: No module named fastapi [root@iZhppytest]# python3 main.py INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit) INFO: Started reloader process [9591] using statreload INFO: Started server process [9599] INFO: Waiting for application startup. INFO: Application startup complete. uvicorn main:app --reload [root@iZh pytest]# uvicorn main:app --reload INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit) INFO: Started reloader process [9626] using statreload INFO: Started server process [9633] INFO: Waiting for application startup. INFO: Application startup complete.

3.前两个都是阻塞式的，并且在控制台关闭之后，程序也就关闭了。使用gunicron 解决

gunicorn main:app -b 127.0.0.1:8000 -w 4 -k uvicorn.workers.UvicornH11Worker --daemon

关闭gunicron 进程 1. 查询进程pid

[root@iZh pytest]# pstree -ap|grep gunicorn |-gunicorn,9362 /usr/local/bin/gunicorn main:app -b 127.0.0.1:8000 -w 4 -k uvicorn.workers.UvicornH11Worker --daemon |-gunicorn,9363 /usr/local/bin/gunicorn main:app -b 127.0.0.1:8000 -w 4 -k uvicorn.workers.UvicornH11Worker --daemon |-gunicorn,9364 /usr/local/bin/gunicorn main:app -b 127.0.0.1:8000 -w 4 -k uvicorn.workers.UvicornH11Worker --daemon |-gunicorn,9365 /usr/local/bin/gunicorn main:app -b 127.0.0.1:8000 -w 4 -k uvicorn.workers.UvicornH11Worker --daemon | `-{gunicorn},9377 | |-grep,9479 --color=auto gunicorn 关闭进程 [root@iZhp3blin25ak7ob1v9hfeZ pytest]# kill -9 9362 [root@iZhp3blin25ak7ob1v9hfeZ pytest]# kill -9 9363 [root@iZhp3blin25ak7ob1v9hfeZ pytest]# kill -9 9364 [root@iZhp3blin25ak7ob1v9hfeZ pytest]# kill -9 9365

测试访问

使用curl测试工具进行测试：

安装curl 工具： yum -y install curl 访问测试： curl 127.0.0.1：8000 [root@iZhp3b local]# curl 127.0.0.1:8000 {"message":"ok"} #返回测试数据 [root@iZ local]#

fastapi 多文件

在项目目录下新建python包，例如orders包，即带有 init.py 文件的目录在python中新建普通的python文件：index.pyindex.py 文件中导入fastapi的路由，使用路由进行api的配置 from fastapi import APIRouter router = APIRouter() #tags为表明这个方法的用途等等 @router.get('/index',tags=['myorder']) async def readOrders(): return {"message":"allorders"} 在项目入口文件中，将路由文件全部进行导入，并配置api路径 from fastapi import FastAPI from order import index #导入router app = FastAPI() #配置router和api访问前缀路径 app.include_router(index.router,prefix="/order") 调用方法与主入口中app修饰下的方法相同调用即可 127.0.0.1:8000/order/index

fastapi 跨域设置

使用中间件进行设置，入口文件中进行设置即可。 CORSMiddleware from fastapi.middleware.cors import CORSMiddleware 基本配置，可跨域的域名，请求的方法等等 #可跨域访问的域名 origins = [ "http://localhost", "http://localhost:8080", ] #可跨域访问的基本请求设置 app.add_middleware( CORSMiddleware, allow_origins=origins, allow_credentials=True, allow_methods=["*"], allow_headers=["*"], )