This is Rack middleware that provides Linked Data content
negotiation for Rack applications. You can use Rack::RDF with any
Ruby web framework based on Rack, including with Ruby on Rails 3.0 and with
Sinatra.
This version is based on [rack-linkeddata][] without the hard dependency on the [linkeddata][] gem, to allow applications to better manage their dependencies
- Implements HTTP content negotiation for RDF content types.
- Supports all RDF.rb compatible serialization formats.
- Compatible with any Rack application and any Rack-based framework.
# config/application.rb
require 'rack/rdf'
class Application < Rails::Application
config.middleware.use Rack::RDF::ContentNegotiation
end
#!/usr/bin/env ruby -rubygems
require 'sinatra'
require 'rack/linkeddata'
use Rack::LinkedData::ContentNegotiation
get '/hello' do
RDF::Graph.new do |graph|
graph << [RDF::Node.new, RDF::DC.title, "Hello, world!"]
end
end
#!/usr/bin/env rackup
require 'rack/rdf'
rdf = RDF::Graph.new do |graph|
graph << [RDF::Node.new, RDF::DC.title, "Hello, world!"]
end
use Rack::RDF::ContentNegotiation
run lambda { |env| [200, {}, rdf] }
use Rack::RDF::ContentNegotiation, default: "text/turtle"
Options are also passed to the writer, which can allow options to be shared among the application and different components.
shared_options = {:default => "text/turtle", :standard_prefixes => true, }
use Rack::RDF::ContentNegotiation, shared_options
run MyApplication, shared_options
$ rackup doc/examples/hello.ru
$ curl -iH "Accept: text/plain" http://localhost:9292/hello
$ curl -iH "Accept: text/turtle" http://localhost:9292/hello
$ curl -iH "Accept: */*" http://localhost:9292/hello
Rack::RDF implements content negotiation for any Rack response
object that implements the RDF::Enumerable mixin. You would typically
return an instance of RDF::Graph or RDF::Repository from your Rack
application, and let the Rack::RDF::ContentNegotiation middleware
take care of serializing your response into whatever RDF format the HTTP
client requested and understands.
The middleware queries RDF.rb for the MIME content types of known RDF serialization formats, so it will work with whatever serialization extensions that are currently available for RDF.rb. (At present, this includes support for N-Triples, N-Quads, Turtle, RDF/XML, RDF/JSON, JSON-LD, RDFa, TriG and TriX.)
##Documentation
https://ruby-rdf.github.io/rack-rdf/
- {Rack::RDF}
- {Rack::RDF::ContentNegotiation}
The recommended installation method is via RubyGems. To install the latest official release of the gem, do:
% [sudo] gem install rack-rdf
To get a local working copy of the development repository, do:
% git clone git://github.com/ruby-rdf/rack-rdf.git
Alternatively, download the latest development version as a tarball as follows:
% wget https://github.com/ruby-rdf/rack-rdf/tarball/master
This repository uses Git Flow to mange development and release activity. All submissions must be on a feature branch based on the develop branch to ease staging and integration.
- Do your best to adhere to the existing coding conventions and idioms.
- Don't use hard tabs, and don't leave trailing whitespace on any line.
- Do document every method you add using YARD annotations. Read the tutorial or just look at the existing code for examples.
- Don't touch the
.gemspec,VERSIONorAUTHORSfiles. If you need to change them, do so on your private branch only. - Do feel free to add yourself to the
CREDITSfile and the corresponding list in the theREADME. Alphabetical order applies. - Do note that in order for us to merge any non-trivial changes (as a rule of thumb, additions larger than about 15 lines of code), we need an explicit public domain dedication on record from you, which you will be asked to agree to on the first commit to a repo within the organization. Note that the agreement applies to all repos in the Ruby RDF organization.
- https://www.w3.org/DesignIssues/LinkedData.html
- https://linkeddata.org/docs/how-to-publish
- https://linkeddata.org/conneg-303-redirect-code-samples
- https://www.w3.org/TR/cooluris/
- https://www.w3.org/TR/swbp-vocab-pub/
- https://patterns.dataincubator.org/book/publishing-patterns.html
This is free and unencumbered public domain software. For more information, see https://unlicense.org/ or the accompanying {file:UNLICENSE} file.