Pagination is not handled in `search` method

[UncleIS]

Hi!

We noticed recently that pagination is not handled properly in the search method:

def search(query = '')
    response = doget "/v2/_catalog"
    # parse the response
    repos = JSON.parse(response)["repositories"]
    if query.strip.length > 0
      re = Regexp.new query
      repos = repos.find_all {|e| re =~ e }
    end
    return repos
  end

The doget "/v2/_catalog" part above works fine in case the registry does not produce the paginated output, but returns only the first page in case it does. In my case, we talk to a private registry that refuses to return a list longer than 100 items, while we have almost 300 of the repositories.

Here are how the headers look like after the doget response has been acquired:

[3] pry(#<DockerRegistry2::Registry>)> response.headers
=> {:server=>"nginx/1.15.6",
 :date=>"Tue, 26 Oct 2021 13:11:36 GMT",
 :content_type=>"application/json",
 :transfer_encoding=>"chunked",
 :connection=>"keep-alive",
 :vary=>"Accept-Encoding, Origin",
 :docker_distribution_api_version=>"registry/2.0",
 :link=>"</v2/_catalog?last=myproject%2F1dx%2Fone_of_my_images&n=100>; rel=\"next\"",
 :strict_transport_security=>"max-age=15724800; includeSubDomains"}

The API itself is described here: https://docs.docker.com/registry/spec/api/#listing-repositories

Thanks!

[deitch]

correct, it is missing that. Nice catch.

Definitely open to a PR for it.

[UncleIS]

I'm not at all a Ruby developer, but could you have a look at the above PR when you have time, please?

Thanks!