速度比较
| 框架 | 实现基础 | 每秒请求数 | 平均时间 |
|---|---|---|---|
| Sanic | Python 3.5 + uvloop | 30,601 | 3.23ms |
| Wheezy | gunicorn + meinheld | 20,244 | 4.94ms |
| Falcon | gunicorn + meinheld | 18,972 | 5.27ms |
| Bottle | gunicorn + meinheld | 13,596 | 7.36ms |
| Flask | gunicorn + meinheld | 4,988 | 20.08ms |
| Kyoukai | Python 3.5 + uvloop | 3,889 | 27.44ms |
| Aiohttp | Python 3.5 + uvloop | 2,979 | 33.42ms |
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 Sanicfrom sanic.response import jsonapp = 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 Sanicfrom sanic.response import [email protected]("/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 Sanicfrom sanic.response import [email protected]('/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.middlewareasync 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 Sanicfrom sanic.exceptions import [email protected]('/killme')def i_am_ready_to_die(request): raise ServerError("Something bad happened")
处理异常
from sanic import Sanicfrom sanic.response import textfrom sanic.exceptions import [email protected](NotFound)def ignore_404s(request, exception): return text("Yep, I totally found the page: {}".format(request.url))
蓝图
和flask中的蓝图一样，用于组织项目结构
创建一个蓝图，相当于创建一个sanic app,上面的用法和上面相同，把app改成蓝图名称bp
from sanic.response import jsonfrom sanic import Blueprintbp = Blueprint('my_blueprint')@bp.route('/')async def bp_root(): return json({'my': 'blueprint'})蓝图注册到主app
from sanic import Sanicfrom my_blueprint import bpapp = Sanic(__name__)app.register_blueprint(bp)app.run(host='0.0.0.0', port=8000, debug=True)
总结
sanic将是一个非常流行的框架．因为它基于python3.5+，使用了许多新的特性，这些特性让程序速度更快。
写在最后
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