Empty Header

[jlipski]

What should be kasper behaviour when it receives an empty optional header, for example x-kasper-country?

I see two options:

1. Return an error, for example unknown country
2. Ignore such headers

Personally I opt for first more strict solution, but it can generate unexpected runtime errors. On the other hand ignoring them may cause confusion if empty header actually has a specific meaning.

In broader sense this question is about header validation - do we validate headers somehow, by checking for valid country code for example?

Related issue: https://viadeo.atlassian.net/browse/KPLAT-225