Cannot work with HTTP code 307 (redirect)

[krulls]

Use case

We are using the Hiera backend (version 1.4.0) to download YAML files for our Puppet deployment manifests.

Environment

Internally we are working with Maven (https://maven.apache.org/) and Nexus OSS (http://www.sonatype.org/nexus/go/) to develop our packages that shall be deployed by Puppet.

In Nexus, artifacts that are developed have a name suffix "-SNAPSHOT", Nexus itself uses a redirect to deliver the latest SNAPSHOT version. A URL to a SNAPSHOT artifact looks like this:
http://internal.nexus.host:8080/service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml

We are running Puppet (Version 3.6.2 with Ruby 1.9) apply command with Hiera configuration file to read values from a YAML file from our Nexus. This is the command line (Windows / Batch File)

puppet apply --modulepath=\\host.intern\modules -l %LogDir%\puppetizer.log --hiera_config=yaml\our_hiera_config.yaml .\manifests\doit.pp

Our Hiera configuration file (yaml\our_hiera_config.yaml) has this configuration:

:http:
  :host: internal.nexus.host
  :port: 8080
  :output: yaml
  :failure: graceful
  :paths:
    - /service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml

Error

We are getting the following log output from Puppet:

2015-07-14 13:25:12 +0200 Puppet (debug): hiera(): [hiera-http]: Lookup url_authentication from internal.nexus.host:8080/service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml
2015-07-14 13:25:12 +0200 Puppet (debug): hiera(): [hiera-http]: bad http response from internal.nexus.host:8080/service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml
2015-07-14 13:25:12 +0200 Puppet (debug): hiera(): HTTP response code was 307

I am able to reproduce that by running Hiera alone, command:

C:\work\hiera-3.0.1\bin>hiera some_variable --debug --config C:\users\krulls\test.yaml

setting
set RUBYLIB=C:\work\hiera-http-1.4.0\lib
to include the Hiera http backend, of course

and result:

DEBUG: 2015-07-15 13:49:17 +0200: [hiera-http]: Lookup maven_artifact_full_id_authentication from internal.nexus.host:8080/service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml
DEBUG: 2015-07-15 13:49:17 +0200: [hiera-http]: bad http response from internal.nexus.host:8080/service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml
DEBUG: 2015-07-15 13:49:17 +0200: HTTP response code was 307
nil

Guesses

Quoting the 'paths' entry

like

  :paths:
    - "/service/local/artifact/maven/redirect?r=snapshots&g=ecg&a=our.artifact&v=1.0.0-SNAPSHOT&e=yaml"

--> Did not succeed

Unhandled http response code

This could be a problem with the underlying handler for http request. Maybe it is not able to work correctly with the certain HTTP code 307, see :
Nexus REST redirect reference?
Issue on an ANT task
SO question regarding Nexus REST API and WGET

[crayfishx]

As discussed over email - the Net::HTTP library won't follow redirects by default - this is a feature that would need to be implemented in hiera-http