[Bug 1823410] Re: utils.py's url_downloadable doesn't support https

[Launchpad Bug Tracker]

** Branch linked: lp:update-manager

-- 
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/1823410

Title:
  utils.py's url_downloadable doesn't support https

Status in update-manager package in Ubuntu:
  In Progress
Status in update-manager source package in Bionic:
  Triaged
Status in update-manager source package in Cosmic:
  Triaged

Bug description:
  In the interest of improving release upgrades for users of PPAs a
  check was added to ubuntu-release-upgrader to see if the release to
  which the system is being upgraded is provided by a sources list entry
  and if it is not that entry is disabled. This check uses the function
  url_downloadable which is provided by update-manager's utils.py. Come
  to find out the url_downloadable check only supports ftp and http, not
  https. This can cause a situation where upgrades to the next release
  of Ubuntu fail if the system's mirror of the Ubuntu archive is using
  https. This is mentioned here -
  https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-
  upgrader/+bug/1807043/comments/10.

  While the bug manifests itself in ubuntu-release-upgrader it needs
  fixing in update-manager.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1823410/+subscriptions