最快的 Python Web 框架入门

来源:Python开发

ID:PythonPush

速度比较

安装

环境：python3.5+
python -m pip install sanic

Hello World

创建文件main.py，写入下面的内容

from sanic import Sanic
from sanic.response import json
app = Sanic(__name__)
@app.route("/")
async def test(request):
    return json({ "hello": "world" })
app.run(host="0.0.0.0", port=8000)

运行 python3 main.py
sanic是不是看起来和flask一样

Request

属性
request.files (dictionary of File objects) - 上传文件列表
request.json (any) - json数据
request.args (dict) - get数据
request.form (dict) - post表单数据

例子

from sanic import Sanic
from sanic.response import json





    
@app.route("/json")
def post_json(request):
    return json({ "received": True, "message": request.json })
@app.route("/form")
def post_json(request):
    return json({ "received": True, "form_data": request.form, "test": request.form.get('test') })
@app.route("/files")
def post_json(request):
    test_file = request.files.get('test')
    file_parameters = {
        'body': test_file.body,
        'name': test_file.name,
        'type': test_file.type,
    }
    return json({ "received": True, "file_names": request.files.keys(), "test_file_parameters": file_parameters })
@app.route("/query_string")
def query_string(request):
    return json({ "parsed": True, "args": request.args, "url": request.url, "query_string": request.query_string })

路由

和flask差不多，一看就懂

from sanic import Sanic
from sanic.response import text
@app.route('/tag/')
async def person_handler(request, tag):
    return text('Tag - {}'.format(tag))





    
@app.route('/number/')
async def person_handler(request, integer_arg):
    return text('Integer - {}'.format(integer_arg))
@app.route('/number/')
async def person_handler(request, number_arg):
    return text('Number - {}'.format(number))
@app.route('/person/')
async def person_handler(request, name):
    return text('Person - {}'.format(name))
@app.route('/folder/')
async def folder_handler(request, folder_id):
    return text('Folder - {}'.format(folder_id))

注册中间件

app = Sanic(__name__)
@app.middleware
async def halt_request(request):
    print("I am a spy")
@app.middleware('request')
async def halt_request(request):
    return text('I halted the request')
@app.middleware('response')
async def halt_response(request, response):
    return text('I halted the response')
@app.route('/')
async def handler(request):
    return text('I would like to speak now please')
app.run(host="0.0.0.0", port=8000)

异常处理

抛出异常

from sanic import Sanic
from sanic.exceptions import ServerError
@app.route('/killme')
def i_am_ready_to_die(request):
    raise