Pip not working behind firewall

Question

I am trying to use pip from behind a corporate firewall, and not having any luck.

I have set the http_proxy and https_proxy environment variables. wget works, but not pip.

I tried this ...

sudo -E pip install virtualenv 

with these proxies ...

export http_proxy=myproxyname.mydomain.com:8080 export https_proxy=myproxyname.mydomain.com:8080  

... and got a long stacktrace which ended with this

/requests/packages/urllib3/poolmanager.py", line 214, in __init__ 'Not supported proxy scheme %s' % self.proxy.scheme AssertionError: Not supported proxy scheme None 

I looked at the poolmanager.py source. It looks like it is requiring the proxy variables to begin with a scheme. So I tried again with the following proxies ...

export http_proxy=http://myproxyname.mydomain.com:8080 export https_proxy=https://myproxyname.mydomain.com:8080 (also tried this with http://) 

... and I get the following error

Downloading/unpacking virtualenv   Cannot fetch index base URL https://pypi.python.org/simple/   Could not find any downloads that satisfy the requirement virtualenv Cleaning up... No distributions at all found for virtualenv Storing debug log for failure in /root/.pip/pip.log 

This is the same error I get when I do not have a proxy at all, though I get it much faster when the proxies are set.

When I try wget ...

wget --no-check-certificate https://pypi.python.org/simple/ 

It works fine, so I think the proxies themselves seem ok, unless I try them with pip.

Using the --proxy option instead of envvars did not help. Same results.

Any ideas?

Thanks, Bean

Answer 1

Use the --trusted-host argument.

I figured out how to get it to work with me behind my corporate firewall using the --trusted-host argument.

My first attempt was this:

pip install matplotlib 

and the failed text was this:

Could not fetch URL https://pypi.python.org/simple/matplotlib/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645) - skipping

So then I tried this which worked:

pip3.5 install matplotlib --trusted-host pypi.python.org

Answer 2

I had to set all this in Windows to make it work.

set http_proxy=http://proxy.corp.com:8083 set https_proxy=http://proxy.corp.com:8083 set all_proxy=http://proxy.corp.com:8083 set no_proxy=localhost,.corp.com  set HTTP_PROXY=http://proxy.corp.com:8083 set HTTPS_PROXY=http://proxy.corp.com:8083 set ALL_PROXY=http://proxy.corp.com:8083 set NO_PROXY=localhost,.corp.com  set PATH=c:\python27\scripts;c:\python27\;%PATH% 

Please replace proxy.corp.com:8083 with your http proxy server.

After that I use pip install numpy

[Last ".corp.com" was missing a period (fixed it).... by the way, after MUCH hair-pulling from behind our corporate firewall, THIS solution was the only one that worked!]