aiohttp session 在不退出上下文管理器的情况下关闭

Question

我有一个非常复杂的 API，带有自定义参数和 headers，所以我创建了一个 class 来环绕它。这是一个人为的例子：

import asyncio
import aiohttp

# The wrapper class around my API
class MyAPI:
    def __init__(self, base_url: str):
        self.base_url = base_url

    async def send(self, session, method, url) -> aiohttp.ClientResponse:
        request_method = getattr(session, method.lower())
        full_url = f"{self.base_url}/{url}"

        async with request_method(full_url) as response:
            return response

async def main():
    api = MyAPI("https://httpbin.org")

    async with aiohttp.ClientSession() as session:
        response = await api.send(session, "GET", "/uuid")
        print(response.status)       # 200 OK
        print(await response.text()) # Exception: Connection closed

asyncio.run(main())

为什么我的 session 关闭了？我没有退出 session.

的上下文管理器

如果我忽略包装器 class，一切都会按预期工作：

async def main():
    async with aiohttp.ClientSession() as session:
        async with session.get("https://httpbin.org/uuid") as response:
            print(await response.text())

Answer 1

离开 request_method(full_url) 上下文后，您将无法调用 response.text()。

如果你写：

        async with request_method(full_url) as response:
            text = await response.text()
            return response.status, text

然后send()方法returns没有错误。

aiohttp session 在不退出上下文管理器的情况下关闭

aiohttp session closed without exiting the context manager

python

python-asyncio

aiohttp