[Bug 1777428] Re: UpdateManager does not work behind proxy in many cases

[Julian Andres Klode]

I think we missed forwarding the proxy setting to aptdaemon when update-
manager switched to that. That said, aptdaemon's proxy support is even
more rudimentary than update-manager's: It only supports one proxy.
update-manager at least has http and https proxies; apt itself supports
proxies configured per host.

Regarding init_proxy():

1. The init_proxy() method initializes the http{s,}_proxy variables from
apt.conf files, if there are any. So it does not need to check the
variable, as it writes it if needed (now, what should take precedence -
general proxy settings or package manager proxy settings is an entirely
different topic!)

2. update-manager's reading of synaptic.conf is irrelevant, it's old
legacy code.

3. update-manager has no way of configuring a proxy other than apt.conf
entries. If you are talking about your user (gnome) preferences, then
those affect your user session, not package management.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1777428

Title:
  UpdateManager does not work behind proxy in many cases

Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  update-manager does not work behind a proxy in many cases.
  reason:
  update-manager calls method init_proxy() in UpdateManager/Core/utils.py.
  This method does not implement what is described in its documentation string:
  1. the implementation does not check the http_proxy environment variable
  2. it tries to read the file /root/.synaptic/synaptic.conf, but due to the access rights drwx------ on the '/root' directory, it can't read the file, unless the user is exactly 'root', but that is rightly completely discouraged by Ubuntu.

  The only option that works is the addition of Acquire::http::Proxy to
  some config file in /etc/apt/apt.conf.d

  It means that update-manager does not work when the user has added
  proxy settings in its Preferences.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: python3-update-manager 1:18.04.11.2
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  Uname: Linux 4.15.0-23-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Mon Jun 18 13:37:42 2018
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'window-height' b'671'
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'window-width' b'898'
   b'com.ubuntu.update-manager' b'launch-time' b'int64 1529319882'
  InstallationDate: Installed on 2018-05-15 (34 days ago)
  InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1777428/+subscriptions