Getting started with the fastest Python WEB framework

Speed comparison

Frame	Implement the Basics	number of requests per second	Average Time
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

Installation

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

Hello World

Create a file main.py, write the following content

From sanic import sanicfrom sanic.response Import Jsonapp = Sanic (__name__) @app. Route ("/") Async def Test (request): Retu RN json ({"Hello": "World"}) App.run (host= "0.0.0.0", port=8000)

Does sanic look like flask?

Request

Properties
Request.Files (Dictionary of File objects)-List of uploaded files
Request.json (any)-JSON data
Request.args (dict)-Get data
Request.Form (dict)-Post form data

Example

From sanic import sanicfrom 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 ') &nbsp @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 })

Routing

And flask Almost, a look at it

From sanic import sanicfrom 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 (' Intege  R-{} '. 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 (NA Me) @app. Route ('/folder/') async def folder_handler (Request, folder_id): Return text (' folder-{} '. Format (folder_id))

Register middleware

App = Sanic (__name__) @app. Middlewareasync def halt_request (request): print ("I am a Spy") @app. Middleware (' request ') Asyn C def halt_request (Request): Return text (' I halted the request ') @app. Middleware (' response ') Async def halt_response (requ EST, response): Return text (' I halted the response ') @app. Route ('/') Async def handler (Request): Return text (' I would Like to speak Now ') App.run (host= "0.0.0.0", port=8000)

Exception handling

Throw exception

From sanic import sanicfrom sanic.exceptions import servererror@app.route ('/killme ') def i_am_ready_to_die (request): RA Ise servererror ("Something bad Happened")

Handling Exceptions

From sanic import sanicfrom sanic.response import textfrom sanic.exceptions import notfound@app.exception (NotFound) def ignore_404s (Request, Exception): Return text ("Yep, I totally found the page: {}". Format (Request.url))

Blueprint

Like the blueprints in flask, for organizing project structures
Create a blueprint that is equivalent to creating a Sanic app with the same usage as above and changing the app to a blueprint name BP

From sanic.response import jsonfrom sanic Import BLUEPRINTBP = Blueprint (' my_blueprint ') @bp. Route ('/') Async def bp_root ( ): Return json ({' My ': ' Blueprint '})

Blueprint registration to the main 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)

Summarize

Sanic will be a very popular framework. Because it's based on python3.5+, it uses many new features that make the program faster.

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Getting started with the fastest Python WEB framework