add-apt-repository does not work with proxy auth if an '@' is in the username

[kenorb]

I'm trying to add the ppa repository (as a root) with the following command:

export HTTP_PROXY="http://<email address hidden>:my_pass@165.x.x.232:8080"
add-apt-repository ppa:nilarimogard/webupd8

But there is an error:
Traceback (most recent call last):
  File "/usr/bin/add-apt-repository", line 125, in <module>
    ppa_info = get_ppa_info_from_lp(user, ppa_name)
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 84, in get_ppa_info_from_lp
    curl.perform()
pycurl.error: (56, 'Received HTTP code 407 from proxy after CONNECT')

Doesn't matter if @ is escaped or not.

When added credentials into .curlrc
cat ~/.curlrc
proxy = 165.x.x.232:8080
proxy-user = <email address hidden>:mypass0

It seems to work for plain curl command, but not for add-apt-repository (pycurl).

CURL HEADERS

Headers sent:
CONNECT launchpad.net:443 HTTP/1.1
Host: launchpad.net:443
Proxy-Authorization: Basic cmFmYWwud2llY3pvcmVrQHVi...3R0RDA=
User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
Proxy-Connection: Keep-Alive

Reply:
HTTP/1.1 200 Connection established

PyCURL HEADERS

Headers sent:
CONNECT launchpad.net:443 HTTP/1.1
Host: launchpad.net:443
User-Agent: PycURL/7.22.0
Proxy-Connection: Keep-Alive
Accept: application/json

Reply:
HTTP/1.1 407 Proxy Authentication Required
Proxy-Authenticate: BASIC realm="proxy"
It seems that PyCURL doesn't re-send any Authorization when requested.

See more explanation here:
http://askubuntu.com/questions/212132/i-cant-add-ppa-repository-behind-the-proxy-with-in-the-username

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Robie Basak (racb)]

I don't think this is a duplicate, so unmarking it. This problem is that an '@' is in the username. The claimed duplicate of bug 516032 is about proxies in general, which is already fixed.

Also, reassigning to software-properties, since that supplies add-apt-repository and not the apt package.