[Bug 1003633] Re: Escape plus character in apt HTTP requests to work around Amazon S3 bug

[Darik Horn]

This non-conformance bug works in both directions, so an easy kludge is
to hard link all file names like this:

$ ln foobar-1.2+baz3_all.deb  'foobar-1.2 baz3_all.deb'

And sync to the s3 bucket normally.  Afterwards, the key can be called
through http with a literal "+" character or the "%2B" escape.  Most
clients like `apt-get` and `wget` will write out a file with the correct
name using either form in the URL.

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https://bugs.launchpad.net/bugs/1003633

Title:
  Escape plus character in apt HTTP requests to work around Amazon S3
  bug

Status in “apt” package in Ubuntu:
  Fix Committed

Bug description:
  
  Amazon S3 performs incorrect query-string un-escaping on URLs and improperly converts the plus ('+') character to a space (' ') when processing incoming GET requests for files.  This causes apt-get to get HTTP 404 errors when downloading packages from S3-hosted mirrors which include a + character in the name of the package.

  For more background info, see:
  https://forums.aws.amazon.com/thread.jspa?threadID=55746

  One possibly solution is to change the call to QuoteString in http.cc
  to include '+' in the character set, which would escape the plus
  character to the %2B form, which will be properly processed by Amazon
  S3.

  Thanks,
  Doug

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