class RDF::Util::File::RestClientAdapter

If the [Rest Client](rubygems.org/gems/rest-client) gem is included, it will be used for retrieving resources allowing for sophisticated HTTP caching using [REST Client Components](rubygems.org/gems/rest-client-components) allowing the use of `Rack::Cache` to avoid network access. @since 1.2

Public Class Methods

open_url(base_uri, options) click to toggle source

@see RDF::Util::File::HttpAdapter.open_url @param [String] base_uri to open @param [Hash{Symbol => Object}] options @return [RemoteDocument, Object] A {RemoteDocument}. If a block is given, the result of evaluating the block is returned. @raise [IOError] if not found

# File lib/rdf/util/file.rb, line 89
def self.open_url(base_uri, options)
  ssl_verify = options[:verify_none] ? OpenSSL::SSL::VERIFY_NONE : OpenSSL::SSL::VERIFY_PEER

  # If RestClient is loaded, prefer it
  RestClient.proxy = options[:proxy].to_s if options[:proxy]
  client = RestClient::Resource.new(base_uri, verify_ssl: ssl_verify)
  client.get(headers(options)) do |response, request, res, &blk|
    case response.code
    when 200..299
      # found object

      # If a Location is returned, it defines the base resource for this file, not it's actual ending location
      document_options = {
        base_uri:     RDF::URI(response.headers.fetch(:location, base_uri)),
        code:         response.code.to_i,
        headers:      response.headers
      }

      remote_document = RemoteDocument.new(response.body, document_options)
    when 300..399
      # Document base is redirected location
      # Location may be relative
      base_uri = ::URI.join(base_uri, response.headers[:location].to_s).to_s
      response.follow_redirection(request, res, &blk)
    else
      raise IOError, "<#{base_uri}>: #{response.code}"
    end
  end
end