[Bug 1829944] Re: magic-proxy does not send along headers for errors

[Launchpad Bug Tracker]

This bug was fixed in the package livecd-rootfs - 2.578.4

---------------
livecd-rootfs (2.578.4) disco; urgency=medium

  [ Robert C Jennings ]
  * magic-proxy: Send headers on error (LP: #1829944)

livecd-rootfs (2.578.3) disco; urgency=medium

  [ Robert C Jennings ]
  * ubuntu-cpc: Ensure base disk image is the same between all build targets
    (LP: #1827426)

 -- Steve Langasek <steve.langasek at ubuntu.com>  Thu, 23 May 2019
13:33:40 -0700

** Changed in: livecd-rootfs (Ubuntu Disco)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1829944

Title:
  magic-proxy does not send along headers for errors

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Disco:
  Fix Released

Bug description:
  [Impact]

  When there is an error with the apt proxy the headers are not returned
  which makes debugging hard.

  [Test Case]

  This was tested on xenial when the release lacked the InRelease file
  by-hash.

  This can be verified manually as follows:

  * Start the proxy via

  ./magic-proxy -t `python -c "import time; print(int(time.time() -
  300))"`

  * In an empty directory do

  mkdir -p ubuntu/dists/xenial/by-hash/SHA256
  touch ubuntu/dists/xenial/InRelease
  python3 -m http.server

  * In a separate terminal telnet to port 8080 and paste

  GET /ubuntu/dists/xenial/InRelease HTTP/1.1
  HOST: localhost:8000

  followed by an empty line. Without the patch, the response will be the
  string "No InRelease file found for given mirror, suite and
  timestamp".

  With the patch applied, the response will start with a HTTP status
  line "HTTP/1.0 404 Not Found" and a set of HTTP headers.

  [Regression Potential]

  Low.  This was tested on xenial when the release lacked the InRelease
  file by-hash.  Also, this code is not yet in use.

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