FastAPI
FastAPI框架
该框架的速度(天然支持异步)比一般的django和flask要快N多倍,号称可以比肩Go
使用该框架需要保证你的python解释器版本是3.6及以上
Ps:django3.X版本也支持异步,但是它的异步功能并没有真正的实现,还有很多bug
安装
pip3 install fastapi pip3 install unicorn
基本使用
from fastapi import FastAPI app = FastAPI() @app.get(‘/‘) # 点get就支持get请求 def read_root(): return {"hello":‘world‘} if __name__ == ‘__main__‘: import uvicorn uvicorn.run(app,host=‘127.0.0.1‘,port=8080)
模版渲染
fastapi本身是没有模版渲染功能的,需要你借助于第三方的模版工具
该框架默认情况下也是借助于jinja2来做模版渲染
安装
pip3 install jinja2
基本使用
from starlette.requests import Request from fastapi import FastAPI from starlette.templating import Jinja2Templates app = FastAPI() # 挂在模版文件夹 tmp = Jinja2Templates(directory=‘templates‘) @app.get(‘/‘) async def get_tmp(request:Request): # async加了就支持异步 return tmp.TemplateResponse(‘index.html‘, {‘request‘:request, # 一定要返回request ‘args‘:‘hello world‘ # 额外的参数可有可无 } ) @app.get(‘/{item_id}/‘) # url后缀 async def get_item(request:Request,item_id): return tmp.TemplateResponse(‘index.html‘, {‘request‘:request, ‘kw‘:item_id }) if __name__ == ‘__main__‘: import uvicorn uvicorn.run(app,host=‘127.0.0.1‘,port=8080)
form表单数据交互
基本数据
from starlette.requests import Request from fastapi import FastAPI,Form from starlette.templating import Jinja2Templates app = FastAPI() tmp = Jinja2Templates(directory=‘templates‘) @app.get(‘/‘) # 接受get请求 async def get_user(request:Request): return tmp.TemplateResponse(‘form.html‘,{‘request‘:request}) @app.post(‘/user/‘) # 接受post请求 async def get_user(request:Request, username:str=Form(...), # 直接去请求体里面获取username键对应的值并自动转化成字符串类型 pwd:int=Form(...) # 直接去请求体里面获取pwd键对应的值并自动转化成整型 ): print(username,type(username)) print(pwd,type(pwd)) return tmp.TemplateResponse(‘form.html‘,{ ‘request‘:request, ‘username‘:username, ‘pwd‘:pwd }) if __name__ == ‘__main__‘: import uvicorn uvicorn.run(app,host=‘127.0.0.1‘,port=8080)
文件交互
from starlette.requests import Request from fastapi import FastAPI, Form, File, UploadFile from starlette.templating import Jinja2Templates from typing import List app = FastAPI() tmp = Jinja2Templates(directory=‘templates‘) @app.get(‘/‘) # 接受get请求 async def get_file(request: Request): return tmp.TemplateResponse(‘file.html‘, {‘request‘: request}) # 单个文件 @app.post(‘/file/‘) # 接受post请求 async def get_user(request: Request, file: bytes = File(...), file_obj: UploadFile = File(...), info: str = Form(...) ): return tmp.TemplateResponse(‘index.html‘, { ‘request‘: request, ‘file_size‘: len(file), ‘file_name‘: file_obj.filename, ‘info‘:info, ‘file_content_type‘:file_obj.content_type }) # 多个文件 @app.post(‘/files/‘) async def get_files(request:Request, files_list:List[bytes] = File(...), # [文件1的二进制数据,文件2的二进制数据] files_obj_list:List[UploadFile]=File(...) # [file_obj1,file_obj2,....] ): return tmp.TemplateResponse(‘index.html‘, {‘request‘:request, ‘file_sizes‘:[len(file) for file in files_list], ‘file_names‘:[file_obj.filename for file_obj in files_obj_list] } ) if __name__ == ‘__main__‘: import uvicorn uvicorn.run(app, host=‘127.0.0.1‘, port=8080)
静态文件配置
from starlette.staticfiles import StaticFiles # 挂载静态文件夹 app.mount(‘/static‘,StaticFiles(directory=‘static‘),name=‘static‘) # 前端 <link rel="stylesheet" href="{{ url_for(‘static‘,path=‘/css/111.css‘) }}"> <script src="{{ url_for(‘static‘,path=‘/js/111.js‘) }}"></script>