Class: Rack::Webfinger

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/webfinger.rb,
lib/rack/webfinger/version.rb

Constant Summary collapse

VERSION = 
"0.2.0"

Instance Method Summary collapse

Constructor Details

#initialize(app, data_provider) ⇒ Webfinger

Returns a new instance of Webfinger.



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# File 'lib/rack/webfinger.rb', line 9

def initialize(app, data_provider)
  @app = app
  @data_provider = data_provider
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/webfinger.rb', line 16

def call(env)
  request = Rack::Request.new(env)

  if request.path != '/.well-known/webfinger'
    return @app.call(env) if @app
    return not_found
  end
  
  resource = request.params['resource']

  if !resource
    return [400, { 'content-type' => 'text/plain' }, ['Missing resource parameter']]
  end

  # We need this because Rack's handling of the query string by default overwrites
  # subsequent 'rel' parameters.

  query_params = Rack::Utils.parse_query(env['QUERY_STRING'])
  rel_params = Array(query_params['rel'])

  data = @data_provider.call(resource, rel_params)
      
  return not_found if !data

  response_data = {
    subject: resource,
    aliases: data[:aliases],
    links: data[:links]
  }
  filtered_data = filter_by_rel(response_data, rel_params)

  [200,
    { 'content-type' => 'application/jrd+json' },
    [JSON.generate(filtered_data)]
  ]
end

#not_found ⇒ Object 



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# File 'lib/rack/webfinger.rb', line 14

def not_found = [404, { 'content-type' => 'text/plain' }, ['Resource not found']]