[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Launchpad Bug Tracker]

This bug was fixed in the package update-manager - 1:16.04.3

---
update-manager (1:16.04.3) xenial; urgency=medium

  * Quote URL parameters for the Release Announcement. (LP: #1561215)

 -- Brian Murray   Mon, 11 Apr 2016 18:49:09 -0700

** Changed in: update-manager (Ubuntu Xenial)
   Status: In Progress => Fix Released

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Brian Murray]

** Changed in: update-manager (Ubuntu Xenial)
   Status: Triaged => In Progress

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Launchpad Bug Tracker]

** Branch linked: lp:update-manager

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Brian Murray]

Looking at MetaRelease.py some more its not even clear to me why we add
these query parameters to the URI since they don't do anything.

** Changed in: update-manager (Ubuntu Xenial)
 Assignee: (unassigned) => Brian Murray (brian-murray)

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Brian Murray]

MetaRelease.py is actually part of update-manager but bundled with
ubuntu-release-upgrader.  I'm switching the package appropriately.

$ ls -lh DistUpgrade/MetaRelease.py
lrwxrwxrwx 1 bdmurray bdmurray 64 Feb  8 14:32 DistUpgrade/MetaRelease.py -> 
/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py

** Package changed: ubuntu-release-upgrader (Ubuntu Xenial) => update-
manager (Ubuntu Xenial)

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Brian Murray]

** Tags added: kubuntu xenial

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Status: New => Triaged

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => Medium

** Also affects: ubuntu-release-upgrader (Ubuntu Xenial)
   Importance: Medium
   Status: Triaged

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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[Bug 1561215] Re: Upgrade to 16.04 blocked by firewall due to HTTP violation

[Xavier Aragon]

This problem only seems to affect Kubuntu upgrades, where the graphical
frontend 'DistUpgradeViewKDE' is used.

If the text mode upgrade is used (e.g. 'do-release-upgrade -d') the
release notes are not shown at all. Also if the GTK graphical frontend
is used (e.g. 'do-release-upgrade -d --frontend=DistUpgradeViewGtk3')
there is no problem, the release notes are correctly downloaded and
shown. But with the KDE frontend ('do-release-upgrade -d
--frontend=DistUpgradeViewKDE' or 'kubuntu-devel-release-upgrade'), the
HTTP request is made with an illegal URI containing a space. In presence
of a strict firewall that request may be dropped, and the upgrade
doesn't proceed.

The reason why the GTK frontend works is that the invalid URI is passed
to WebKit, which "fixes" the URI, i.e. encodes the space in the URI as
%20 before sending the HTTP request to the server. With the KDE
frontend, however, the URI is passed to python's
urllib.request.urlopen() function, which doesn't "fix" the URI, i.e. the
HTTP request is made with the illegal URI containing a space (coming
from the version string '16.04 LTS', i.e. this problem only affects
upgrades to LTS releases).

I believe this is a bug in MetaRelease.py which produces the
'dist.releaseNotesHtmlUri' but doesn't encode it properly for use as an
URI.

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Title:
  Upgrade to 16.04 blocked by firewall due to HTTP violation

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