Class: LinkMiddleware::Filter

Inherits:
Object
  • Object
show all
Defined in:
lib/link-middleware/filter.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Filter

Returns a new instance of Filter.



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# File 'lib/link-middleware/filter.rb', line 5

def initialize(app, options={})
  @app = app       
  @options = options
  if options[:store]        
    @store = options[:store]
  elsif options[:store_impl]
    @store = options[:store].new(options)
  else
    @store = LinkMiddleware::MemoryStore.new(options)
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/link-middleware/filter.rb', line 17

def call(env)         
  request = Rack::Request.new( env )  
  if request.request_method == "LINK"
    return link( request.url, env )
  elsif request.request_method == "UNLINK"
    return unlink( request.url, env )
  end          
  @app.call(env)
end

#link(url, env) ⇒ Object 



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# File 'lib/link-middleware/filter.rb', line 27

def link(url, env)
  links = LinkHeader.parse( env["HTTP_LINK"] )
  success = @store.add(url,links)
  headers = {}
  if success
    headers["Link"] = links.to_s unless links.links.empty?
    return [200, headers, ["OK"]]
  else
    return [500, headers, ["Unable to add links"]]
  end      
end

#unlink(url, env) ⇒ Object 



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# File 'lib/link-middleware/filter.rb', line 39

def unlink(url, env)
  links = LinkHeader.parse( env["HTTP_LINK"] )
  success = @store.remove(url,links)
  headers = {}
  if success
    headers["Link"] = links.to_s unless links.links.empty?
    return [200, headers, ["OK"]]
  else
    return [500, headers, ["Unable to add links"]]
  end      
end