pip3 install sanic

SANIC_NO_UVLOOP=true SANIC_NO_UJSON=true pip3 install sanic

conda config --add channels conda-forge
conda install sanic

from sanic import Sanic
from sanic.response import json

app = Sanic()

@app.route("/")
async def test(request):
  return json({"hello": "world"})

if __name__ == "__main__":
  app.run(host="0.0.0.0", port=8000)

python main.py

app = Sanic('myapp')
app.config.DB_NAME = 'appdb'
app.config.DB_USER = 'appuser'

db_settings = {
    'DB_HOST': 'localhost',
    'DB_NAME': 'appdb',
    'DB_USER': 'appuser'
}
app.config.update(db_settings)

app = Sanic(load_env='MYAPP_')

app = Sanic(load_env=False)

import myapp.default_settings

app = Sanic('myapp')
app.config.from_object(myapp.default_settings)

app = Sanic('myapp')
app.config.from_object('config.path.config.Class')

app = Sanic('myapp')
app.config.from_envvar('MYAPP_SETTINGS')

#$ MYAPP_SETTINGS=/path/to/config_file python3 myapp.py
#INFO: Goin' Fast @ http://0.0.0.0:8000

# config_file
DB_HOST = 'localhost'
DB_NAME = 'appdb'
DB_USER = 'appuser'

from sanic import Sanic
from sanic.log import logger
from sanic.response import text

app = Sanic('test')

@app.route('/')
async def test(request):
    logger.info('Here is your log')
    return text('Hello World!')

if __name__ == "__main__":
  app.run(debug=True, access_log=True)

[2018-11-06 21:16:53 +0800] [24622] [INFO] Goin' Fast @ http://127.0.0.1:8000
[2018-11-06 21:16:53 +0800] [24667] [INFO] Starting worker [24667]

[2018-11-06 21:18:53 +0800] [25685] [INFO] Here is your log
[2018-11-06 21:18:53 +0800] - (sanic.access)[INFO][127.0.0.1:57038]: GET http://localhost:8000/  200 12

app = Sanic('test', log_config=LOGGING_CONFIG)

if __name__ == "__main__":
  app.run(access_log=False)

if __name__ == "__main__":
  # disable debug messages
  app.run(debug=False, access_log=False)

%(asctime)s - (%(name)s)[%(levelname)s][%(host)s]: %(request)s %(message)s %(status)d %(byte)d

from sanic.response import json

@app.route("/json")
def post_json(request):
  return json({ "received": True, "message": request.json })

from sanic.response import json

@app.route("/query_string")
def query_string(request):
  return json({ "parsed": True, "args": request.args, "url": request.url, "query_string": request.query_string })

 from sanic import Sanic
  from sanic.response import json

  app = Sanic(__name__)


  @app.route("/test_request_args")
  async def test_request_args(request):
    return json({
        "parsed": True,
        "url": request.url,
        "query_string": request.query_string,
        "args": request.args,
        "raw_args": request.raw_args,
        "query_args": request.query_args,
    })

  if __name__ == '__main__':
    app.run(host="0.0.0.0", port=8000)

{
    "parsed":true,
    "url":"http:\/\/0.0.0.0:8000\/test_request_args?key1=value1&key2=value2&key1=value3",
    "query_string":"key1=value1&key2=value2&key1=value3",
    "args":{"key1":["value1","value3"],"key2":["value2"]},
    "raw_args":{"key1":"value1","key2":"value2"},
    "query_args":[["key1","value1"],["key2","value2"],["key1","value3"]]
}

from sanic.response import json

@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 })

from sanic.response import text

@app.route("/users", methods=["POST",])
def create_user(request):
    return text("You are trying to create a user with the following POST: %s" % request.body)

from sanic.response import json
from sanic import Blueprint

bp = Blueprint('my_blueprint')

@bp.route('/')
async def bp_root(request):
    if request.app.config['DEBUG']:
        return json({'status': 'debug'})
    else:
        return json({'status': 'production'})

from sanic.response import json

@app.route("/query_string")
def query_string(request):
    args_with_blank_values = request.get_args(keep_blank_values=True)
    return json({
        "parsed": True,
        "url": request.url,
        "args_with_blank_values": args_with_blank_values,
        "query_string": request.query_string
    })

{
    "parsed": true,
    "url": "http:\/\/0.0.0.0:8000\/query_string?test1=value1&test2=&test3=value3",
    "args_with_blank_values": {"test1": ["value1"], "test2": "", "test3": ["value3"]},
    "query_string": "test1=value1&test2=&test3=value3"
}

from sanic.request import RequestParameters
args = RequestParameters()
args['titles'] = ['Post 1', 'Post 2']
args.get('titles') # => 'Post 1'
args.getlist('titles') # => ['Post 1', 'Post 2']

from sanic.response import text
from sanic import Sanic

app = Sanic()

@app.get("/")
def hello(request):
    return text(request.endpoint)

from sanic import Sanic
from sanic import Blueprint
from sanic.response import text


app = Sanic(__name__)
blueprint = Blueprint('foo')

@blueprint.get('/')
async def bar(request):
    return text(request.endpoint)

app.blueprint(blueprint)

app.run(host="0.0.0.0", port=8000, debug=True)

from sanic import response


@app.route('/text')
def handle_request(request):
    return response.text('Hello world!')

from sanic import response


@app.route('/html')
def handle_request(request):
    return response.html('<p>Hello world!</p>')

from sanic import response


@app.route('/json')
def handle_request(request):
    return response.json({'message': 'Hello world!'})

from sanic import response


@app.route('/file')
async def handle_request(request):
    return await response.file('/srv/www/whatever.png')

from sanic import response

@app.route("/streaming")
async def index(request):
    async def streaming_fn(response):
        await response.write('foo')
        await response.write('bar')
    return response.stream(streaming_fn, content_type='text/plain')

from sanic import response


@app.route('/redirect')
def handle_request(request):
    return response.redirect('/json')

from sanic import response


@app.route('/raw')
def handle_request(request):
    return response.raw(b'raw data')

from sanic.response import text

@app.route("/cookie")
async def test(request):
    test_cookie = request.cookies.get('test')
    return text("Test cookie set to: {}".format(test_cookie))

from sanic.response import text

@app.route("/cookie")
async def test(request):
    response = text("There's a cookie up in this response")
    response.cookies['test'] = 'It worked!'
    response.cookies['test']['domain'] = '.gotta-go-fast.com'
    response.cookies['test']['httponly'] = True
    return response

from sanic.response import text

@app.route("/cookie")
async def test(request):
    response = text("Time to eat some cookies muahaha")

    # This cookie will be set to expire in 0 seconds
    del response.cookies['kill_me']

    # This cookie will self destruct in 5 seconds
    response.cookies['short_life'] = 'Glad to be here'
    response.cookies['short_life']['max-age'] = 5
    del response.cookies['favorite_color']

    # This cookie will remain unchanged
    response.cookies['favorite_color'] = 'blue'
    response.cookies['favorite_color'] = 'pink'
    del response.cookies['favorite_color']

    return response

from sanic.response import json

@app.route("/")
async def test(request):
    return json({ "hello": "world" })

from sanic.response import text

@app.route('/tag/<tag>')
async def tag_handler(request, tag):
    return text('Tag - {}'.format(tag))

                                                                                                                                                                                                                                                                                                          -- 30

from sanic.response import text

@app.route('/string/<string_arg:string>')
async def string_handler(request, string_arg):
    return text('String - {}'.format(string_arg))

@app.route('/int/<integer_arg:int>')
async def integer_handler(request, integer_arg):
    return text('Integer - {}'.format(integer_arg))

@app.route('/number/<number_arg:number>')
async def number_handler(request, number_arg):
    return text('Number - {}'.format(number_arg))

@app.route('/alpha/<alpha_arg:alpha>')
async def number_handler(request, alpha_arg):
    return text('Alpha - {}'.format(alpha_arg))

@app.route('/path/<path_arg:path>')
async def number_handler(request, path_arg):
    return text('Path - {}'.format(path_arg))

@app.route('/uuid/<uuid_arg:uuid>')
async def number_handler(request, uuid_arg):
    return text('Uuid - {}'.format(uuid_arg))

@app.route('/person/<name:[A-z]+>')
async def person_handler(request, name):
    return text('Person - {}'.format(name))

@app.route('/folder/<folder_id:[A-z0-9]{0,4}>')
async def folder_handler(request, folder_id):
    return text('Folder - {}'.format(folder_id))

from sanic.response import text

@app.route('/post', methods=['POST'])
async def post_handler(request):
    return text('POST request - {}'.format(request.json))

@app.route('/get', methods=['GET'])
async def get_handler(request):
    return text('GET request - {}'.format(request.args))
    

@app.route('/get', methods=['GET'], host='example.com')
async def get_handler(request):
    return text('GET request - {}'.format(request.args))

# if the host header doesn't match example.com, this route will be used
@app.route('/get', methods=['GET'])
async def get_handler(request):
    return text('GET request in default - {}'.format(request.args))

from sanic.response import text

@app.post('/post')
async def post_handler(request):
    return text('POST request - {}'.format(request.json))

@app.get('/get')
async def get_handler(request):
    return text('GET request - {}'.format(request.args))

from sanic.response import text

# Define the handler functions
async def handler1(request):
    return text('OK')

async def handler2(request, name):
    return text('Folder - {}'.format(name))

async def person_handler2(request, name):
    return text('Person - {}'.format(name))

# Add each handler function as a route
app.add_route(handler1, '/test')
app.add_route(handler2, '/folder/<name>')
app.add_route(person_handler2, '/person/<name:[A-z]>', methods=['GET'])

from sanic.response import redirect

@app.route('/')
async def index(request):
    # generate a URL for the endpoint `post_handler`
    url = app.url_for('post_handler', post_id=5)
    # the URL is `/posts/5`, redirect to it
    return redirect(url)

@app.route('/posts/<post_id>')
async def post_handler(request, post_id):
    return text('Post - {}'.format(post_id))

url = app.url_for('post_handler', post_id=5, arg_one='one', arg_two='two')
# /posts/5?arg_one=one&arg_two=two

url = app.url_for('post_handler', post_id=5, arg_one=['one', 'two'])
# /posts/5?arg_one=one&arg_one=two

url = app.url_for('post_handler', post_id=5, arg_one='one', _anchor='anchor')
# /posts/5?arg_one=one#anchor

url = app.url_for('post_handler', post_id=5, arg_one='one', _external=True)
# //server/posts/5?arg_one=one
# _external requires you to pass an argument _server or set SERVER_NAME in app.config if not url will be same as no _external

url = app.url_for('post_handler', post_id=5, arg_one='one', _scheme='http', _external=True)
# http://server/posts/5?arg_one=one
# when specifying _scheme, _external must be True

# you can pass all special arguments at once
url = app.url_for('post_handler', post_id=5, arg_one=['one', 'two'], arg_two=2, _anchor='anchor', _scheme='http', _external=True, _server='another_server:8888')
# http://another_server:8888/posts/5?arg_one=one&arg_one=two&arg_two=2#anchor

@app.websocket('/feed')
async def feed(request, ws):
    while True:
        data = 'hello!'
        print('Sending: ' + data)
        await ws.send(data)
        data = await ws.recv()
        print('Received: ' + data)

async def feed(request, ws):
    pass

app.add_websocket_route(my_websocket_handler, '/feed')

# provide default strict_slashes value for all routes
app = Sanic('test_route_strict_slash', strict_slashes=True)

# you can also overwrite strict_slashes value for specific route
@app.get('/get', strict_slashes=False)
def handler(request):
    return text('OK')

# It also works for blueprints
bp = Blueprint('test_bp_strict_slash', strict_slashes=True)

@bp.get('/bp/get', strict_slashes=False)
def handler(request):
    return text('OK')

app.blueprint(bp)

from sanic import Sanic, Blueprint
from sanic.response import text

app = Sanic("sample_strict_slashes", strict_slashes=True)

@app.get("/r1")
def r1(request):
    return text("strict_slashes is applicable from App level")

@app.get("/r2", strict_slashes=False)
def r2(request):
    return text("strict_slashes is not applicable due to  False value set in route level")

bp = Blueprint("bp", strict_slashes=False)

@bp.get("/r3", strict_slashes=True)
def r3(request):
    return text("strict_slashes applicable from blueprint route level")

bp1 = Blueprint("bp1", strict_slashes=True)

@bp.get("/r4")
def r3(request):
    return text("strict_slashes applicable from blueprint level")

app = Sanic('test_named_route')

@app.get('/get', name='get_handler')
def handler(request):
    return text('OK')

# then you need use `app.url_for('get_handler')`
# instead of # `app.url_for('handler')`

# It also works for blueprints
bp = Blueprint('test_named_bp')

@bp.get('/bp/get', name='get_handler')
def handler(request):
    return text('OK')

app.blueprint(bp)

# then you need use `app.url_for('test_named_bp.get_handler')`
# instead of `app.url_for('test_named_bp.handler')`

# different names can be used for same url with different methods

@app.get('/test', name='route_test')
def handler(request):
    return text('OK')

@app.post('/test', name='route_post')
def handler2(request):
    return text('OK POST')

@app.put('/test', name='route_put')
def handler3(request):
    return text('OK PUT')

# below url are the same, you can use any of them
# '/test'
app.url_for('route_test')
# app.url_for('route_post')
# app.url_for('route_put')

# for same handler name with different methods
# you need specify the name (it's url_for issue)
@app.get('/get')
def handler(request):
    return text('OK')

@app.post('/post', name='post_handler')
def handler(request):
    return text('OK')

# then
# app.url_for('handler') == '/get'
# app.url_for('post_handler') == '/post'
生成静态文件的
Sanic支持使用url_for方法构建静态文件url。如果静态url指向目录，则可以忽略url_for的filename参数。q

app = Sanic('test_static')
app.static('/static', './static')
app.static('/uploads', './uploads', name='uploads')
app.static('/the_best.png', '/home/ubuntu/test.png', name='best_png')

bp = Blueprint('bp', url_prefix='bp')
bp.static('/static', './static')
bp.static('/uploads', './uploads', name='uploads')
bp.static('/the_best.png', '/home/ubuntu/test.png', name='best_png')
app.blueprint(bp)

# then build the url
app.url_for('static', filename='file.txt') == '/static/file.txt'
app.url_for('static', name='static', filename='file.txt') == '/static/file.txt'
app.url_for('static', name='uploads', filename='file.txt') == '/uploads/file.txt'
app.url_for('static', name='best_png') == '/the_best.png'

# blueprint url building
app.url_for('static', name='bp.static', filename='file.txt') == '/bp/static/file.txt'
app.url_for('static', name='bp.uploads', filename='file.txt') == '/bp/uploads/file.txt'
app.url_for('static', name='bp.best_png') == '/bp/static/the_best.png'

from sanic import Sanic
from sanic.blueprints import Blueprint

app = Sanic(__name__)

# Serves files from the static folder to the URL /static
app.static('/static', './static')
# use url_for to build the url, name defaults to 'static' and can be ignored
app.url_for('static', filename='file.txt') == '/static/file.txt'
app.url_for('static', name='static', filename='file.txt') == '/static/file.txt'

# Serves the file /home/ubuntu/test.png when the URL /the_best.png
# is requested
app.static('/the_best.png', '/home/ubuntu/test.png', name='best_png')

# you can use url_for to build the static file url
# you can ignore name and filename parameters if you don't define it
app.url_for('static', name='best_png') == '/the_best.png'
app.url_for('static', name='best_png', filename='any') == '/the_best.png'

# you need define the name for other static files
app.static('/another.png', '/home/ubuntu/another.png', name='another')
app.url_for('static', name='another') == '/another.png'
app.url_for('static', name='another', filename='any') == '/another.png'

# also, you can use static for blueprint
bp = Blueprint('bp', url_prefix='/bp')
bp.static('/static', './static')

# specify a different content_type for your files
# such as adding 'charset'
app.static('/', '/public/index.html', content_type="text/html; charset=utf-8")

# servers the file directly
bp.static('/the_best.png', '/home/ubuntu/test.png', name='best_png')
app.blueprint(bp)

app.url_for('static', name='bp.static', filename='file.txt') == '/bp/static/file.txt'
app.url_for('static', name='bp.best_png') == '/bp/test_best.png'

app.run(host="0.0.0.0", port=8000)

from sanic import Sanic

app = Sanic(__name__)

app.static('/static', './static')
app.static('/example_static', './example_static', host='www.example.com')

from sanic import Sanic

app = Sanic(__name__)

app.static('/large_video.mp4', '/home/ubuntu/large_video.mp4', stream_large_files=True)
当stream_large_files为True时，Sanic将使用file_stream（）而不是file（）来提供静态文件。这将使用1KB作为默认块大小。而且，如果需要，您还可以使用自定义块大小。例如：

from sanic import Sanic

app = Sanic(__name__)

chunk_size = 1024 * 1024 * 8 # Set chunk size to 8KB
app.static('/large_video.mp4', '/home/ubuntu/large_video.mp4', stream_large_files=chunk_size)

from sanic.response import json
from sanic import Blueprint

bp = Blueprint('my_blueprint')

@bp.route('/')
async def bp_root(request):
    return json({'my': 'blueprint'})
注册蓝图
蓝图必须在应用程序中注册。

from sanic import Sanic
from my_blueprint import bp

app = Sanic(__name__)
app.blueprint(bp)

app.run(host='0.0.0.0', port=8000, debug=True)

[Route(handler=<function bp_root at 0x7f908382f9d8>, methods=frozenset({'GET'}), pattern=re.compile('^/$'), parameters=[], name='my_blueprint.bp_root', uri='/')]

api /
├──内容/
│├──authors.py
│├──static.py
│└──__init__。py
├──info.py
└──__init__。py
app.py

# api/content/authors.py
from sanic import Blueprint

authors = Blueprint('content_authors', url_prefix='/authors')
# api/content/static.py
from sanic import Blueprint

static = Blueprint('content_static', url_prefix='/static')
# api/content/__init__.py
from sanic import Blueprint

from .static import static
from .authors import authors

content = Blueprint.group(static, authors, url_prefix='/content')
# api/info.py
from sanic import Blueprint

info = Blueprint('info', url_prefix='/info')
# api/__init__.py
from sanic import Blueprint

from .content import content
from .info import info

api = Blueprint.group(content, info, url_prefix='/api')

# app.py
from sanic import Sanic

from .api import api

app = Sanic(__name__)

app.blueprint(api)

@bp.middleware
async def print_on_request(request):
    print("I am a spy")

@bp.middleware('request')
async def halt_request(request):
    return text('I halted the request')

@bp.middleware('response')
async def halt_response(request, response):
    return text('I halted the response')
蓝图组中间件
使用此中间件将确保您可以将公共中间件应用于构成当前正在考虑的蓝图组的所有蓝图。

bp1 = Blueprint('bp1', url_prefix='/bp1')
bp2 = Blueprint('bp2', url_prefix='/bp2')

@bp1.middleware('request')
async def bp1_only_middleware(request):
    print('applied on Blueprint : bp1 Only')

@bp1.route('/')
async def bp1_route(request):
    return text('bp1')

@bp2.route('/<param>')
async def bp2_route(request, param):
    return text(param)

group = Blueprint.group(bp1, bp2)

@group.middleware('request')
async def group_middleware(request):
    print('common middleware applied for both bp1 and bp2')

# Register Blueprint group under the app
app.blueprint(group)

@bp.exception(NotFound)
def ignore_404s(request, exception):
    return text("Yep, I totally found the page: {}".format(request.url))
    

# suppose bp.name == 'bp'

bp.static('/web/path', '/folder/to/serve')
# also you can pass name parameter to it for url_for
bp.static('/web/path', '/folder/to/server', name='uploads')
app.url_for('static', name='bp.uploads', filename='file.txt') == '/bp/web/path/file.txt'

bp = Blueprint('my_blueprint')

@bp.listener('before_server_start')
async def setup_connection(app, loop):
    global database
    database = mysql.connect(host='127.0.0.1'...)

@bp.listener('after_server_stop')
async def close_connection(app, loop):
    await database.close()

# blueprints.py
from sanic.response import text
from sanic import Blueprint

blueprint_v1 = Blueprint('v1', url_prefix='/api', version="v1")
blueprint_v2 = Blueprint('v2', url_prefix='/api', version="v2")

@blueprint_v1.route('/')
async def api_v1_root(request):
    return text('Welcome to version 1 of our documentation')

@blueprint_v2.route('/')
async def api_v2_root(request):
    return text('Welcome to version 2 of our documentation')
当我们在应用程序上注册蓝图时，路由/ v1 / api和/ v2 / api现在将指向各个蓝图，从而可以 为每个API版本创建子站点。

# main.py
from sanic import Sanic
from blueprints import blueprint_v1, blueprint_v2

app = Sanic(__name__)
app.blueprint(blueprint_v1)
app.blueprint(blueprint_v2)

app.run(host='0.0.0.0', port=8000, debug=True)

@blueprint_v1.route('/')
async def root(request):
    url = request.app.url_for('v1.post_handler', post_id=5) # --> '/v1/api/post/5'
    return redirect(url)


@blueprint_v1.route('/post/<post_id>')
async def post_handler(request, post_id):
    return text('Post {} in Blueprint V1'.format(post_id))

from sanic import response


@app.route('/text', version=1)
def handle_request(request):
    return response.text('Hello world! Version 1')

@app.route('/text', version=2)
def handle_request(request):
    return response.text('Hello world! Version 2')

app.run(port=80)

curl localhost/v1/text
curl localhost/v2/text

from sanic import response
from sanic.blueprints import Blueprint

bp = Blueprint('test', version=1)

@bp.route('/html')
def handle_request(request):
    return response.html('<p>Hello world!</p>')
    

curl localhost/v1/html

from sanic.exceptions import ServerError

@app.route('/killme')
async def i_am_ready_to_die(request):
    raise ServerError("Something bad happened", status_code=500)

from sanic.exceptions import abort
from sanic.response import text

@app.route('/youshallnotpass')
async def no_no(request):
        abort(401)
        # this won't happen
        text("OK")

from sanic.response import text
from sanic.exceptions import NotFound

@app.exception(NotFound)
async def ignore_404s(request, exception):
    return text("Yep, I totally found the page: {}".format(request.url))

from sanic import Sanic

async def server_error_handler(request, exception):
    return text("Oops, server error", status=500)

app = Sanic()
app.error_handler.add(Exception, server_error_handler)

from sanic import Sanic
from sanic.handlers import ErrorHandler

class CustomErrorHandler(ErrorHandler):
    def default(self, request, exception):
        ''' handles errors that have no error handlers assigned '''
        # You custom error handling logic...
        return super().default(request, exception)

app = Sanic()
app.error_handler = CustomErrorHandler()

@app.middleware('request')
async def print_on_request(request):
    print("I print when a request is received by the server")

@app.middleware('response')
async def print_on_response(request, response):
    print("I print when a response is returned by the server")
    

app = Sanic(__name__)

@app.middleware('request')
async def add_key(request):
    # Arbitrary data may be stored in request context:
    request.ctx.foo = 'bar'

@app.middleware('response')
async def custom_banner(request, response):
    response.headers["Server"] = "Fake-Server"


@app.middleware('response')
async def prevent_xss(request, response):
    response.headers["x-xss-protection"] = "1; mode=block"

@app.get("/")
async def index(request):
    return sanic.response.text(request.ctx.foo)

app.run(host="0.0.0.0", port=8000)

@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.listener('before_server_start')
async def setup_db(app, loop):
    app.db = await db_setup()

@app.listener('after_server_start')
async def notify_server_started(app, loop):
    print('Server successfully started!')

@app.listener('before_server_stop')
async def notify_server_stopping(app, loop):
    print('Server shutting down!')

@app.listener('after_server_stop')
async def close_db(app, loop):
    await app.db.close()

app = Sanic()

async def setup_db(app, loop):
    app.db = await db_setup()

app.register_listener(setup_db, 'before_server_start')

async def notify_server_started_after_five_seconds():
    await asyncio.sleep(5)
    print('Server successfully started!')

app.add_task(notify_server_started_after_five_seconds())

async def notify_server_started_after_five_seconds(app):
    await asyncio.sleep(5)
    print(app.name)

app.add_task(notify_server_started_after_five_seconds)

async def notify_server_started_after_five_seconds(app):
    await asyncio.sleep(5)
    print(app.name)

app.add_task(notify_server_started_after_five_seconds(app))

from sanic import Sanic
from sanic.response import json
from sanic.websocket import WebSocketProtocol

app = Sanic()

@app.websocket('/feed')
async def feed(request, ws):
    while True:
        data = 'hello!'
        print('Sending: ' + data)
        await ws.send(data)
        data = await ws.recv()
        print('Received: ' + data)

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8000, protocol=WebSocketProtocol)
    

async def feed(request, ws):
    pass

app.add_websocket_route(feed, '/feed')

app.config.WEBSOCKET_MAX_SIZE = 2 ** 20
app.config.WEBSOCKET_MAX_QUEUE = 32
app.config.WEBSOCKET_READ_LIMIT = 2 ** 16
app.config.WEBSOCKET_WRITE_LIMIT = 2 ** 16

from functools import wraps
from sanic.response import json

def authorized():
    def decorator(f):
        @wraps(f)
        async def decorated_function(request, *args, **kwargs):
            # run some method that checks the request
            # for the client's authorization status
            is_authorized = check_request_for_authorization_status(request)

            if is_authorized:
                # the user is authorized.
                # run the handler method and return the response
                response = await f(request, *args, **kwargs)
                return response
            else:
                # the user is not authorized.
                return json({'status': 'not_authorized'}, 403)
        return decorated_function
    return decorator


@app.route("/")
@authorized()
async def test(request):
    return json({'status': 'authorized'})

from sanic import Sanic
from sanic.views import CompositionView
from sanic.views import HTTPMethodView
from sanic.views import stream as stream_decorator
from sanic.blueprints import Blueprint
from sanic.response import stream, text

bp = Blueprint('blueprint_request_stream')
app = Sanic('request_stream')


class SimpleView(HTTPMethodView):

    @stream_decorator
    async def post(self, request):
        result = ''
        while True:
            body = await request.stream.read()
            if body is None:
                break
            result += body.decode('utf-8')
        return text(result)


@app.post('/stream', stream=True)
async def handler(request):
    async def streaming(response):
        while True:
            body = await request.stream.read()
            if body is None:
                break
            body = body.decode('utf-8').replace('1', 'A')
            await response.write(body)
    return stream(streaming)


@bp.put('/bp_stream', stream=True)
async def bp_put_handler(request):
    result = ''
    while True:
        body = await request.stream.read()
        if body is None:
            break
        result += body.decode('utf-8').replace('1', 'A')
    return text(result)


# You can also use `bp.add_route()` with stream argument
async def bp_post_handler(request):
    result = ''
    while True:
        body = await request.stream.read()
        if body is None:
            break
        result += body.decode('utf-8').replace('1', 'A')
    return text(result)

bp.add_route(bp_post_handler, '/bp_stream', methods=['POST'], stream=True)


async def post_handler(request):
    result = ''
    while True:
        body = await request.stream.read()
        if body is None:
            break
        result += body.decode('utf-8')
    return text(result)

app.blueprint(bp)
app.add_route(SimpleView.as_view(), '/method_view')
view = CompositionView()
view.add(['POST'], post_handler, stream=True)
app.add_route(view, '/composition_view')


if __name__ == '__main__':
    app.run(host='127.0.0.1', port=8000)

from sanic import Sanic
from sanic.response import stream

app = Sanic(__name__)

@app.route("/")
async def test(request):
    async def sample_streaming_fn(response):
        await response.write('foo,')
        await response.write('bar')

    return stream(sample_streaming_fn, content_type='text/csv')
    

@app.route("/")
async def index(request):
    async def stream_from_db(response):
        conn = await asyncpg.connect(database='test')
        async with conn.transaction():
            async for record in conn.cursor('SELECT generate_series(0, 10)'):
                await response.write(record[0])

    return stream(stream_from_db)

from aiofiles import os as async_os
from sanic.response import file_stream

@app.route("/")
async def index(request):
    file_path = "/srv/www/whatever.png"

    file_stat = await async_os.stat(file_path)
    headers = {"Content-Length": str(file_stat.st_size)}

    return await file_stream(
        file_path,
        headers=headers,
        chunked=False,
    )

from sanic import Sanic
from sanic.views import HTTPMethodView
from sanic.response import text

app = Sanic('some_name')

class SimpleView(HTTPMethodView):

  def get(self, request):
      return text('I am get method')

  def post(self, request):
      return text('I am post method')

  def put(self, request):
      return text('I am put method')

  def patch(self, request):
      return text('I am patch method')

  def delete(self, request):
      return text('I am delete method')

app.add_route(SimpleView.as_view(), '/')

from sanic import Sanic
from sanic.views import HTTPMethodView
from sanic.response import text

app = Sanic('some_name')

class SimpleAsyncView(HTTPMethodView):

  async def get(self, request):
      return text('I am async get method')

app.add_route(SimpleAsyncView.as_view(), '/')

class NameView(HTTPMethodView):

  def get(self, request, name):
    return text('Hello {}'.format(name))

app.add_route(NameView.as_view(), '/<name>')

class ViewWithDecorator(HTTPMethodView):
  decorators = [some_decorator_here]

  def get(self, request, name):
    return text('Hello I have a decorator')

  def post(self, request, name):
    return text("Hello I also have a decorator")

app.add_route(ViewWithDecorator.as_view(), '/url')

class ViewWithSomeDecorator(HTTPMethodView):

    @staticmethod
    @some_decorator_here
    def get(request, name):
        return text("Hello I have a decorator")

    def post(self, request, name):
        return text("Hello I don't have any decorators")

@app.route('/')
def index(request):
    url = app.url_for('SpecialClassView')
    return redirect(url)


class SpecialClassView(HTTPMethodView):
    def get(self, request):
        return text('Hello from the Special Class View!')


app.add_route(SpecialClassView.as_view(), '/special_class_view')

from sanic import Sanic
from sanic.views import CompositionView
from sanic.response import text

app = Sanic(__name__)

def get_handler(request):
    return text('I am a get method')

view = CompositionView()
view.add(['GET'], get_handler)
view.add(['POST', 'PUT'], lambda request: text('I am a post/put method'))

# Use the new view to handle requests to the base URL
app.add_route(view, '/')

from sanic import Sanic
from sanic.server import HttpProtocol
from sanic.response import text

app = Sanic(__name__)


class CustomHttpProtocol(HttpProtocol):

    def __init__(self, *, loop, request_handler, error_handler,
                 signal, connections, request_timeout, request_max_size):
        super().__init__(
            loop=loop, request_handler=request_handler,
            error_handler=error_handler, signal=signal,
            connections=connections, request_timeout=request_timeout,
            request_max_size=request_max_size)

    def write_response(self, response):
        if isinstance(response, str):
            response = text(response)
        self.transport.write(
            response.output(self.request.version)
        )
        self.transport.close()


@app.route('/')
async def string(request):
    return 'string'


@app.route('/1')
async def response(request):
    return text('response')

app.run(host='0.0.0.0', port=8000, protocol=CustomHttpProtocol)

from sanic import Sanic
from sanic.response import json
import socket

sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
sock.bind(('::', 7777))

app = Sanic()


@app.route("/")
async def test(request):
    return json({"hello": "world"})

if __name__ == "__main__":
    app.run(sock=sock)

 curl -g -6 "http://[::1]:7777/"

import signal
import sys
import socket
import os
from sanic import Sanic
from sanic.response import json


server_socket = '/tmp/sanic.sock'

sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.bind(server_socket)

app = Sanic()


@app.route("/")
async def test(request):
    return json({"hello": "world"})


def signal_handler(sig, frame):
        print('Exiting')
        os.unlink(server_socket)
        sys.exit(0)


if __name__ == "__main__":
    app.run(sock=sock)