Do not pass empty service param to auth challenge #204
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When an auth challenge does not contain a value for service there is no point in passing an empty value to the challenge endpoint. Moreover, not passing an empty values makes it easier for a proxy [1] to omit the service name from a client and set it before forwarding a request. [1] https://docs.docker.com/registry/recipes/nginx/ Signed-off-by: Athos Ribeiro <athoscr@fedoraproject.org>
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When an auth challenge does not contain a value for service there is no
point in passing an empty value to the challenge endpoint. Moreover, not
passing an empty values makes it easier for a proxy [1] to omit the
service name from a client and set it before forwarding a request.
[1] https://docs.docker.com/registry/recipes/nginx/
Signed-off-by: Athos Ribeiro athoscr@fedoraproject.org