SSLError(SSLError(1, ‘[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)‘))

问题描述

在使用pip安装包时，报上面的错误，造成无法成功安装包。

Collecting django
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))': /simple/django/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))': /simple/django/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))': /simple/django/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))': /simple/django/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))': /simple/django/
  Could not fetch URL https://pypi.org/simple/django/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/django/ (Caused by SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))) - skipping
  Could not find a version that satisfies the requirement django (from versions: )
No matching distribution found for django
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1056)'))) - skipping

问题原因

是因为配置了代理HTTPS_PROXY(或者https_proxy)为https的地址, 但是代理服务又不支持https, 然后就造成https握手时出现问题。
示例：

HTTPS_PROXY="https://username:[email protected]:8080"

解决方案

既然代理不支持https， 可以采用下面两种方案中的一种。

1. 如果可以不知用代理，则直接设置 HTTPS_PROXY的配置为空，或者直接删掉。
2. 配置HTTPS_PROXY 使用http的代理地址。如：

HTTPS_PROXY="http://username:[email protected]:8080"

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参考

‘SSLError’ installing with pip