Class: RDF::Util::File::RestClientAdapter

Inherits:
HttpAdapter
  • Object
show all
Defined in:
lib/rdf/util/file.rb

Overview

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

Class Method Summary collapse

Methods inherited from HttpAdapter

default_accept_header, headers

Class Method Details

.open_url(base_uri, options) ⇒ RemoteDocument, Object

Returns A RDF::Util::File::RemoteDocument. If a block is given, the result of evaluating the block is returned.

Raises:

  • (IOError) —

    if not found

See Also:

Since:

  • 1.2



89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
 
# 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