Public bug reported:
I previously reported this in #983559, but it seems that it is a
completely unrelated issue.
1) Ubuntu 12.04 LTS
2) 0.119ubuntu8.4
3) I expected to be able to install packages which need to download external
files (e.g. flashplugin-installer, ttf-mscorefonts-installer)
4) package-data-downloader is unable to download these files through my cntlm
proxy
At university, I can only access the outside world through an NTLM
proxy, so I direct everything through a cntlm proxy running locally on
my machine. Everything used to work as expected, but since the change
in Precise to the way that packages download external files, I am unable
to install these packages unless I hack the package-data-downloader
script to replace urllib with an external wget call (patch included).
This is definitely not an issue with finding the proxy settings when
using sudo -- I have verified that the environment variables are found
as expected. I have also reproduced this issue with a minimal python
example which I have run as my normal user.
If I monitor the /tmp/ directory after issuing the command to install
one of these packages, I can see that a temporary file is created and
grows until it reaches the expected size of the file to be downloaded.
However, the script does not detect that the file has finished
downloading, and hangs forever, without giving any indication of an
error, until it is terminated.
Since I am able to download these files without any difficulty using
wget, I have patched my script to use wget instead of urllib. When I do
this, everything works as expected. I therefore believe that there is a
bug in urllib which is triggered by cntlm. I have looked for a known
bug which could be responsible, but I haven't been able to find anything
yet.
In the meantime, using wget instead of urllib fixes the problem. I
don't know if this is considered a tidy solution, but it works.
** Affects: update-notifier (Ubuntu)
Importance: Undecided
Status: New
** Tags: apt cntlm download dpkg proxy
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https://bugs.launchpad.net/bugs/1009436
Title:
package-data-downloader hangs forever when attempting to download
through cntlm proxy
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