session在Sanic中的使用

2023年8月24日 15:30 by wst

web开发

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使用过flask中的session后，感觉还是挺方便的，能够保存用户的状态，又不用关心它是怎么实现的。

那么在sanic中是否有类似的机制呢？经过查找，发现了sanic_session.

在内存中存储数据

安装方式：

pip install sanic_session

使用示例：

from sanic import Sanic
from sanic.response import text
from sanic_session import Session

app = Sanic()
Session(app)

@app.route("/")
async def index(request):
    # interact with the session like a normal dict
    if not request.ctx.session.get('foo'):
        request.ctx.session['foo'] = 0

    request.ctx.session['foo'] += 1

    return text(str(request.ctx.session['foo']))

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

现象：

每请求一次，得到的数字都会加1.

在redis中存储数据

另外再安装依赖包：

pip install asyncio_redis

使用示例：

import asyncio_redis

from sanic import Sanic
from sanic.response import text
from sanic_session import Session, RedisSessionInterface

app = Sanic()


class Redis:
    """
    A simple wrapper class that allows you to share a connection
    pool across your application.
    """
    _pool = None

    async def get_redis_pool(self):
        if not self._pool:
            self._pool = await asyncio_redis.Pool.create(
                host='localhost', port=6379, poolsize=10
            )

        return self._pool


redis = Redis()

Session(app, interface=RedisSessionInterface(redis.get_redis_pool))


@app.route("/")
async def test(request):
    # interact with the session like a normal dict
    if not request.ctx.session.get('foo'):
        request.ctx.session['foo'] = 0

    request.ctx.session['foo'] += 1

    response = text(str(request.ctx.session['foo']))

    return response

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

 

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