[Pkg-puppet-devel] Bug#869183: puppet: Fix "No supported formats are acceptable (Accept: s, pson)" while bucketing from Puppet Agent v3

[Mathieu Parent]

Package: puppet
Version: 4.10.4-2
Severity: important

Dear Maintainer,

With the following code in site.pp or similar:

  filebucket { 'main':
    path => false, # Remote filebucket
  }
  File {
    backup => 'main',
  }

Bucketing fails from puppet3 agent to puppet master 4 (stretch/sid) with:
  Error: Could not back up /etc/puppet/auth.conf: Error 406 on SERVER:
{"message":"Not Acceptable: No supported formats are acceptable
(Accept: s, pson)","issue_kind":"UNSUPPORTED_FORMAT"}

The attached patch fixes this and matches the behavior of:
https://github.com/puppetlabs/puppetserver/blob/ff0e5e84860ea9b035839e77e9b27d4c3a923e36/src/clj/puppetlabs/services/legacy_routes/legacy_routes_core.clj#L27-L42

NB: I think this should also go in stretch-pu.

Regards

Mathieu Parent
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