I have used TJ's ppa for some months, and it worked flawlessly. Thanks
TJ!

Unfortunately, Ubuntu released 2.0.8 for focal, which overwrites 2.0.6.2 from 
TJ's ppa.
Therefore, I created my own ppa[1]. My ppa is based on 2.0.8 and includes the 
same fixes as TJ's ppa.

I've just tested it while updating the linux-surface kernel for one of
my surface devices, and it worked as expected.

I expect to maintain the ppa as long I use focal myself, which I expect
to be at least one year from now, and possibly longer.

[1]: https://launchpad.net/~gpxbv/+archive/ubuntu/apt-urlfix

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https://bugs.launchpad.net/bugs/1950095

Title:
  [github] 20.04: Apt fails to download URLs with non-encoded
  querystrings

Status in apt package in Ubuntu:
  Fix Released

Bug description:
  I've just helped a group of Ubuntu 20.04 users with Microsoft Surface
  devices. They rely upon a github repository releases pocket as the apt
  archive. Those users recently hit a bug "Ubuntu: Apt update fails with
  Error 401 Unauthorized" [1]

  The initial simple Github URL gets a Location: redirect to a complex
  URL with un-escaped query-string. The resulting complex URL causes apt
  to fail to fetch the resource.

  $ sudo apt upgrade -y
  Err:1 https://pkg.surfacelinux.com/debian release/main amd64 libwacom-surface 
amd64 1.12-2
    401  Unauthorized [IP: 185.199.110.133 443]

  The URL can be manually corrected. One of the Surface users provided
  this example:

  bad:  https://objects.githubusercontent.com/github-production-release-
  asset-2e65be/139604852/86019e52-7bfa-4bc6-8cc1-52147027aee6?X-Amz-
  Algorithm=AWS4-HMAC-SHA256&X-Amz-
  Credential=AKIAIWNJYAX4CSVEH53A/20211105/us-
  east-1/s3/aws4_request&X-Amz-Date=20211105T161053Z&X-Amz-
  Expires=300&X-Amz-
  
Signature=2bc0c28946db539ada250b1030c37249dae909d73a68c90b5e7bfe7fecd5d347&X-Amz-
  SignedHeaders=host&actor_id=0&key_id=0&repo_id=139604852&response-
  content-disposition=attachment; filename=libwacom-
  surface_1.12-2_amd64.deb&response-content-type=application/octet-
  stream

  good: https://objects.githubusercontent.com/github-production-release-
  asset-2e65be/139604852/86019e52-7bfa-4bc6-8cc1-52147027aee6?X-Amz-
  Algorithm=AWS4-HMAC-SHA256&X-Amz-
  Credential=AKIAIWNJYAX4CSVEH53A%2F20211105%2Fus-
  east-1%2Fs3%2Faws4_request&X-Amz-Date=20211105T160935Z&X-Amz-
  Expires=300&X-Amz-
  
Signature=44d9307e66dfb5b3672ee0082b8801ad2532ac4b6be61c3442fb265ffce72852&X-Amz-
  SignedHeaders=host&actor_id=0&key_id=0&repo_id=139604852&response-
  content-disposition=attachment%3B%20filename%3Dlibwacom-
  surface_1.12-2_amd64.deb&response-content-type=application%2Foctet-
  stream

  I found this also affects a github repository I recently added for
  Zotero on 20.04.

  The problem is fixed in later versions of apt upstream, in Debian and
  Ubuntu releases. I cherry-picked the 4 commits [3] and provided a
  package for Focal in my PPA [2] which multiple users have reported (in
  [1]) solves the issue.

  It would be really good to get those patches included in 20.04 as an
  SRU.

  As the code is in later versions of apt and is focused on the URL
  encoding only it has minimal potential for causing regressions.

  [1] https://github.com/linux-surface/linux-surface/issues/625

  [2] https://launchpad.net/~tj/+archive/ubuntu/bugfixes

  [3] https://salsa.debian.org/apt-
  team/apt/-/commit/06ec0067057e0578f3bc515f6a97d6a9d70824f6

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