标签：def lan stat dir sts init 前端 需要 res
该框架的速度(天然支持异步)比一般的django和flask要快N多倍
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
from fastapi import FastAPI app = FastAPI() @app.get(‘/‘) # .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=8085)
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
使用
from starlette.requests import Request from fastapi import FastAPI from starlette.templating import Jinja2Templates app = FastAPI() # 挂载模板文件夹 directory后面是真正的文件夹名字 temp = Jinja2Templates(directory=‘templates‘) @app.get(‘/‘) async def get_temp(request:Request): # async加了就支持异步 return temp.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 temp.TemplateResponse(‘index.html‘, {‘request‘:request, ‘kw‘:item_id }) if __name__ == ‘__main__‘: import uvicorn uvicorn.run(app,host=‘127.0.0.1‘,port=8085)
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)
files.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script> </head> <body> <h1>单个文件</h1> <form action="/file/" method="post" enctype="multipart/form-data"> <input type="file" name="file"> <input type="file" name="file_obj"> <input type="text" name="info"> <input type="submit"> </form> <h1>多个文件</h1> <form action="/files/" method="post" enctype="multipart/form-data"> <input type="file" name="files_list" multiple> <!--{# multiple加上就支持一次性传多个文件#}--> <input type="file" name="files_obj_list" multiple> <input type="submit"> </form> </body> </html>
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script> </head> <body> <h1>单个文件</h1> <h1>{{ file_size }}</h1> <h1>{{ file_name }}</h1> <h1>{{ info }}</h1> <h1>{{ file_content_type }}</h1> <h1>多个文件</h1> <h1>{{ file_sizes }}</h1> <h1>{{ file_names }}</h1> </body> </html>
from starlette.staticfiles import StaticFiles # 挂载静态文件夹 ‘/static‘是前端引用的名字，name是起别名 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>
标签：def lan stat dir sts init 前端 需要 res
原文地址：https://www.cnblogs.com/baohanblog/p/12730823.html
