aiohttp.client_exceptions.ClientConnectorError:无法连接到主机***.com:443 ssl:默认[连接调用失败('151.101.193.69',443

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【中文标题】aiohttp.client_exceptions.ClientConnectorError:无法连接到主机***.com:443 ssl:默认[连接调用失败(\'151.101.193.69\',443)]【英文标题】:aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host ***.com:443 ssl:default [Connect call failed ('151.101.193.69', 443)]aiohttp.client_exceptions.ClientConnectorError:无法连接到主机***.com:443 ssl:默认[连接调用失败('151.101.193.69',443)] 【发布时间】:2020-11-30 12:11:20 【问题描述】:

这是我的代码:

import asyncio
from aiohttp import ClientSession


async def main():
    url = "https://***.com/"

    async with ClientSession() as session:
        async with session.get(url) as resp:
            print(resp.status)

asyncio.run(main())

如果我在我的计算机上运行它,一切正常,但如果我在 pythonanywhere 上运行它,我会收到以下错误:

Traceback (most recent call last):
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/connector.py", line 936, in _wrap_create_connection
    return await self._loop.create_connection(*args, **kwargs)  # type: ignore  # noqa
  File "/usr/lib/python3.8/asyncio/base_events.py", line 1017, in create_connection
    raise exceptions[0]
  File "/usr/lib/python3.8/asyncio/base_events.py", line 1002, in create_connection
    sock = await self._connect_sock(
  File "/usr/lib/python3.8/asyncio/base_events.py", line 916, in _connect_sock
    await self.sock_connect(sock, address)
  File "/usr/lib/python3.8/asyncio/selector_events.py", line 485, in sock_connect
    return await fut
  File "/usr/lib/python3.8/asyncio/selector_events.py", line 517, in _sock_connect_cb
    raise OSError(err, f'Connect call failed address')
ConnectionRefusedError: [Errno 111] Connect call failed ('151.101.193.69', 443)
The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "test_c.py", line 39, in <module>
    asyncio.run(main())
  File "/usr/lib/python3.8/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/usr/lib/python3.8/asyncio/base_events.py", line 608, in run_until_complete
    return future.result()
  File "test_c.py", line 28, in main
    async with session.get(url, timeout=30) as resp:  # , headers=headers
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/client.py", line 1012, in __aenter__
    self._resp = await self._coro
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/client.py", line 480, in _request
    conn = await self._connector.connect(
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/connector.py", line 523, in connect
    proto = await self._create_connection(req, traces, timeout)
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/connector.py", line 858, in _create_connection
    _, proto = await self._create_direct_connection(
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/connector.py", line 1004, in _create_direct_connection
    raise last_exc
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/connector.py", line 980, in _create_direct_connection
    transp, proto = await self._wrap_create_connection(
  File "/home/0dminnimda/.local/lib/python3.8/site-packages/aiohttp/connector.py", line 943, in _wrap_create_connection
    raise client_error(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host ***.com:443 ssl:default [Connect call failed ('151.101.193.69', 443)]
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x7f25a71d1a90>

aiohttp 托管:

Name: aiohttp
Version: 3.6.2
Summary: Async http client/server framework (asyncio)
Home-page: https://github.com/aio-libs/aiohttp
Author: Nikolay Kim
Author-email: fafhrd91@gmail.com
License: Apache 2
Location: /home/0dminnimda/.local/lib/python3.8/site-packages
Requires: chardet, async-timeout, multidict, yarl, attrs
Required-by: 

我的电脑上的 aiohttp:

Name: aiohttp
Version: 3.6.2
Summary: Async http client/server framework (asyncio)
Home-page: https://github.com/aio-libs/aiohttp
Author: Nikolay Kim
Author-email: fafhrd91@gmail.com
License: Apache 2
Location: c:\users\asus\appdata\roaming\python\python38\site-packages
Requires: async-timeout, attrs, chardet, yarl, multidict
Required-by: 

我很茫然,不是这样吗?我正在使用 python3.8 运行这两个文件。

我也试过其他网址,他们有同样的问题

我需要添加更多细节吗?

【问题讨论】:

【参考方案1】:

发出请求时将 ssl 设置为 False

import aiohttp
conn = aiohttp.TCPConnector()

async with aiohttp.ClientSession(connector=conn) as session:
    await session.get('https://example.com', ssl=False)

【讨论】:

您应该知道禁用 SSL 检查是不安全的。如果您不知道自己在做什么,请不要将其用作解决方案。【参考方案2】:

如果您使用 Windows 操作系统python(3.8 或更高版本)和 aiohttp(3.7.4 或更低版本) 有时像... Cannot connect to host &lt;REQUESTED URL&gt;:443 ssl:default [The parameter is incorrect] 这样的异常的解决方案是:

import sys

...

policy = asyncio.WindowsSelectorEventLoopPolicy()
asyncio.set_event_loop_policy(policy)

asyncio.run(main())

您可以检查您的 Python 版本和操作系统:

import sys

...

if (sys.platform.startswith('win')
        and sys.version_info[0] == 3
        and sys.version_info[1] >= 8):
    policy = asyncio.WindowsSelectorEventLoopPolicy()
    asyncio.set_event_loop_policy(policy)

asyncio.run(main())

here, in issue 4536,一切都描述得更详细了。

【讨论】:

参考 issue 4636,例外是Cannot connect to host python.or g:443 ssl:default [The parameter is incorrect] 而不是Cannot connect to host ***.com:443 ssl:default [Connect call failed ('151.101.193.69', 443)],这些是略有不同的例外。您最好创建一个具有确切回溯的问题并回答它。 好的,但我认为我的文字更易读【参考方案3】:

第一个解决方案

参考help from the forum,我在创建客户端时添加了trust_env = True,现在一切正常。

说明: PythonAnywhere 上的免费帐户必须使用代理连接到公共互联网,但默认情况下,aiohttp 不会连接到可从环境变量访问的代理。

Link to aiohttp documentation(查找名为“trust_env”的参数)

这是新代码:

import asyncio
from aiohttp import ClientSession


async def main():
    url = "https://***.com/"

    async with ClientSession(trust_env=True) as session:
        async with session.get(url) as resp:
            print(resp.status)

asyncio.run(main())

如果第一个没有帮助您的解决方案

您尝试访问的域必须在whitelist,否则您也可能会收到此错误。

在这种情况下,您需要post a new topic on the pythonanywhere forum 要求将域添加到白名单。 如果这是一个 api,那么您需要提供此 api 文档的链接。

【讨论】:

似乎我们遇到了不同的问题,我的解决方案与 SSL 错误有关,即 aiohttp 无法找到从 certifi 安装的证书。 @jackotonye,您可以像我在这里一样,发布您的问题并立即回答。我想如果有人遇到像你这样的错误,他们会很高兴看到你的解决方案! (我也会很高兴看到它) @jackotonye 如果您看到的错误本身(视觉上)与此问题中提出的错误没有太大区别,那么您不应该删除答案,因为其他人可能需要它偶然发现这个问题! 是的,你说得对,我添加了一个更相关问题的答案谢谢***.com/a/66842057/4584672

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