python 3.7异步示例

使用python 3.7，asyncio获得了以下类型的主要更新：

• asyncio.AbstractEventLoop

• asyncio.AbstractServer

这个示例演示了如何将SANIC与Python3.7结合使用，更准确地说：如何检索Asyncio服务器实例：

import asyncio
import socket
import os

from sanic import Sanic
from sanic.response import json

app = Sanic(__name__)


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


server_socket = '/tmp/sanic.sock'

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

try:
    os.remove(server_socket)
finally:
    sock.bind(server_socket)

if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    srv_coro = app.create_server(
        sock=sock,
        return_asyncio_server=True,
        asyncio_server_kwargs=dict(
            start_serving=False
        )
    )
    srv = loop.run_until_complete(srv_coro)
    try:
        assert srv.is_serving() is False
        loop.run_until_complete(srv.start_serving())
        assert srv.is_serving() is True
        loop.run_until_complete(srv.serve_forever())
    except KeyboardInterrupt:
        srv.close()
        loop.close()

请注意，uvloop还不支持这些功能。