python请求中的OpenSSL错误

Question

运行python版本3.9.1在arch linux与OpenSSL版本1.1.1i和pyopenssl版本1.1.1i我得到以下错误时，尝试使用https代理与请求模块：

    Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/urllib3/connectionpool.py", line 696, in urlopen
    self._prepare_proxy(conn)
  File "/usr/lib/python3.9/site-packages/urllib3/connectionpool.py", line 964, in _prepare_proxy
    conn.connect()
  File "/usr/lib/python3.9/site-packages/urllib3/connection.py", line 359, in connect
    conn = self._connect_tls_proxy(hostname, conn)
  File "/usr/lib/python3.9/site-packages/urllib3/connection.py", line 496, in _connect_tls_proxy
    return ssl_wrap_socket(
  File "/usr/lib/python3.9/site-packages/urllib3/util/ssl_.py", line 424, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
  File "/usr/lib/python3.9/site-packages/urllib3/util/ssl_.py", line 466, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock)
  File "/usr/lib/python3.9/ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "/usr/lib/python3.9/ssl.py", line 1040, in _create
    self.do_handshake()
  File "/usr/lib/python3.9/ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1123)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/requests/adapters.py", line 439, in send
    resp = conn.urlopen(
  File "/usr/lib/python3.9/site-packages/urllib3/connectionpool.py", line 755, in urlopen
    retries = retries.increment(
  File "/usr/lib/python3.9/site-packages/urllib3/util/retry.py", line 573, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='google.com', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1123)')))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.9/site-packages/requests/api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "/usr/lib/python3.9/site-packages/requests/api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python3.9/site-packages/requests/sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python3.9/site-packages/requests/sessions.py", line 655, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python3.9/site-packages/requests/adapters.py", line 514, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='google.com', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1123)')))

我正在运行的代码是：

import requests

proxy = {
    'https' : 'https://proxyip:proxyport'
}

requests.get("https://google.com", proxies=proxy)

无论我尝试什么https代理，我都会得到相同的错误。我还重新安装了openssl和python，没有任何更改。有什么建议吗？

Answer 1

它是固定与我的情况下，通过这个命令：

 python3 -m pip install urllib3==1.22

Answer 2

... line 496, in _connect_tls_proxy

您的代码试图使用（新）支持通过HTTPS访问代理本身。之所以这样做，是因为您明确地将该URL作为代理指定为https://...而非http://...：

'https' : 'https://proxyip:proxyport'
           ^^^^^^

很可能代理本身不支持到代理的TLS连接。通常HTTP代理只有到代理的普通HTTP连接。他们仍然可以通过这种方式代理HTTPS流量，因为客户端只需向代理发出一个连接请求来创建一个隧道，然后在客户端和服务器之间使用端到端TLS。

通过HTTPS访问代理将在客户端和代理之间添加额外的TLS层，这是大多数代理不支持的。因此，您可能需要普通HTTP代理：

 'https' : 'http://proxyip:proxyport'
           ^^^^^^

请注意，在旧版本的请求库中，使用http://和https://进行访问都有效。这些旧版本不支持HTTPS到代理，只使用普通HTTP，即使指定了HTTPS://。