知識星球
來源:Python開發
ID:PythonPush
速度比較
| 框架 | 實現基礎 | 每秒請求數 | 平均時間 |
|---|---|---|---|
| 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 |
安裝
環境：python3.5+ python -m pip install sanic
Hello World
建立檔案main.py，寫入下麵的內容
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)
執行 python3 main.py
sanic是不是看起來和flask一樣
Request
屬性
request.files (dictionary of File objects) - 上傳檔案串列
request.json (any) - json資料
request.args (dict) - get資料
request.form (dict) - post表單資料
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))
註冊中介軟體
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)
異常處理
丟擲異常
from sanic import Sanic
from sanic.exceptions import ServerError
@app.route('/killme')
def i_am_ready_to_die(request):
raise ServerError("Something bad happened")
處理異常
from sanic import Sanic
from sanic.response import text
from sanic.exceptions import NotFound
@app.exception(NotFound)
def ignore_404s(request, exception):
return text("Yep, I totally found the page: {}".format(request.url))
藍圖
和flask中的藍圖一樣，用於組織專案結構
建立一個藍圖，相當於建立一個sanic app,上面的用法和上面相同，把app改成藍圖名稱bp
from sanic.response import json
from sanic import Blueprint
bp = Blueprint('my_blueprint')
@bp.route('/')
async def bp_root():
return json({'my': 'blueprint'})
藍圖註冊到主app
from sanic import Sanic
from my_blueprint import bp
app = Sanic(__name__)
app.register_blueprint(bp)
app.run(host='0.0.0.0', port=8000, debug=True)
總結
sanic將是一個非常流行的框架．因為它基於python3.5+，使用了許多新的特性，這些特性讓程式速度更快。
《Python人工智慧和全棧開發》2018年07月23日即將在北京開課，120天衝擊Python年薪30萬，改變速約~~~~
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