Module: Scrappy::Admin

Defined in:
lib/scrappy/server/admin.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.registered(app) ⇒ Object 



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# File 'lib/scrappy/server/admin.rb', line 6

def self.registered app
  app.set :method_override, true
  app.use Rack::Flash
  
  app.get '/' do
    if params[:format] and params[:uri]
      redirect "#{settings.base_uri}/#{params[:format]}/#{simplify_uri(params[:uri])}"
    else
      haml :home
    end
  end
  
  app.get '/javascript' do
    fragments = agent.fragments_for(Scrappy::Kb.extractors, params[:uri])
    content_type 'application/javascript'
    "window.scrappy_extractor=#{fragments.any?};" + open("#{settings.public_folder}/javascripts/annotator.js").read
  end
  
  app.get '/help' do
    haml :help
  end
  
  # Extractors 
  
  app.get '/extractors' do
    @uris = ( Agent::Options.kb.find(nil, Node('rdf:type'), Node('sc:UriSelector')) +
              Agent::Options.kb.find(nil, Node('rdf:type'), Node('sc:UriPatternSelector')) ).
              map { |node| node.rdf::value }.flatten.sort.map(&:to_s)
    haml :extractors
  end
  
  app.post '/extractors' do
    if params[:html]
      # Generate extractor automatically
      html = Iconv.iconv('UTF-8', params[:encoding], params[:html]).first
      samples = [{ :html=>html, :uri=>params[:uri] }]
      extractor = agent.train_xpath(*samples)
      # Train
      Scrappy::App.add_extractor extractor
      # Optimize
      Scrappy::App.replace_extractor agent.optimize_extractors(Scrappy::Kb.extractors, samples), samples
    else
      # Store the given extractor
      Scrappy::App.add_extractor RDF::Parser.parse(:yarf,params[:rdf])
    end
    flash[:notice] = "Extractor stored"
    redirect "#{settings.base_uri}/extractors"
  end      
  app.delete '/extractors/*' do |uri|
    Scrappy::App.delete_extractor uri
    flash[:notice] = "Extractor deleted"
    redirect "#{settings.base_uri}/extractors"
  end

  # Patterns
  
  app.get '/patterns' do
    @patterns = ( Scrappy::Kb.patterns.find(nil, Node('rdf:type'), Node('sc:Fragment')) -
                  Scrappy::Kb.patterns.find([], Node('sc:subfragment'), nil) )
    haml :patterns
  end

  app.get '/patterns/visual' do
    @patterns = ( Scrappy::Kb.patterns.find(nil, Node('rdf:type'), Node('sc:Fragment')) -
                  Scrappy::Kb.patterns.find([], Node('sc:subfragment'), nil) )
    html = @patterns.map { |pattern| render_fragment(pattern) } * ""
    "<html><body>#{html}</body></html>"
  end

  app.get '/patterns/*' do |id|
    "<html><body>#{render_fragment(Scrappy::Kb.patterns[id])}</body></html>"
  end

  app.delete '/patterns' do
    Scrappy::App.delete_patterns
    flash[:notice] = "Patterns deleted"
    redirect "#{settings.base_uri}/patterns"
  end
  
  app.delete '/patterns/*' do |id|
    Scrappy::App.delete_pattern id
    flash[:notice] = "Pattern deleted"
    redirect "#{settings.base_uri}/patterns"
  end
  
  # Samples
  
  app.get '/samples' do
    @samples = Scrappy::App.samples
    haml :samples
  end
  
  app.get '/samples/:id' do |id|
    Nokogiri::HTML(Scrappy::App.samples[id.to_i][:html], nil, 'utf-8').search("*").map do |node|
      next if node.text?
      text  = node.children.map { |n| n.content if n.text? } * " "
      x = node[:vx].to_i
      y = node[:vy].to_i
      w = node[:vw].to_i
      h = node[:vh].to_i
      font = node[:vfont]
      size = node[:vsize].to_i
      weight = node[:vweight].to_i
      color  = "#555"
      color  = "#55f" if node.name == "a"
      style  = "position: absolute; left: #{x}px; top: #{y}px; width: #{w}px; height: #{h}px; font-family: #{font}; font-size: #{size}px; font-weight: #{weight}; border: 1px solid gray; color: #{color};"
      style += "background-color: #f00; opacity: 0.2;" if node.name == "img"
      style += "text-decoration: underline;" if node.name == "a"
      "<div style='#{style}'>#{text}</div>"
    end * ""
  end

  app.get '/samples/:id/raw' do |id|
    Scrappy::App.samples[id.to_i][:html]
  end

  app.get '/samples/:id/annotations' do |id|
    headers 'Content-Type' => 'text/plain'
    RDF::Graph.new(Scrappy::App.samples[id.to_i][:output] || []).serialize(:yarf)
  end

  app.get '/samples/:id/:kb_type' do |id,kb_type|
    kb = (kb_type == "patterns" ? Scrappy::Kb.patterns : Scrappy::Kb.extractors)
    sample = Scrappy::App.samples[id.to_i]
    headers 'Content-Type' => 'text/plain'
    RDF::Graph.new(agent.extract(sample[:uri], sample[:html], kb, Agent::Options.referenceable)).serialize(:yarf)
  end
  
  app.post '/samples/annotate' do
    samples = (params['samples'] || []).map { |i| Scrappy::App.samples[i.to_i] }.each do |sample|
      sample[:output] = agent.extract(sample[:uri], sample[:html], Scrappy::Kb.extractors)
    end
    Scrappy::App.save_samples
    flash[:notice] = "Samples annotated"
    redirect "#{settings.base_uri}/samples"
  end
  
  app.post '/samples/train/:kb_type' do |kb_type|
    kb = (kb_type == "patterns" ? Scrappy::Kb.patterns : Scrappy::Kb.extractors)
    samples = (params['samples'] || []).map { |i| Scrappy::App.samples[i.to_i] }
    if kb_type == "patterns"
      Scrappy::App.add_patterns agent.train(*samples)
    else
      Scrappy::App.add_extractor agent.train_xpath(*samples)
    end
    flash[:notice] = "Training completed"
    redirect "#{settings.base_uri}/samples"
  end
  
  app.post '/samples/optimize/:kb_type' do |kb_type|
    kb = (kb_type == "patterns" ? Scrappy::Kb.patterns : Scrappy::Kb.extractors)
    samples = (params['samples'] || []).map { |i| Scrappy::App.samples[i.to_i] }
    if kb_type == "patterns"
      Scrappy::App.save_patterns agent.optimize_patterns(kb, samples)
    else
      Scrappy::App.replace_extractor agent.optimize_extractors(kb, samples), samples
    end
    flash[:notice] = "Optimization completed"
    redirect "#{settings.base_uri}/samples"
  end
  
  app.post '/samples/test/:kb_type' do |kb_type|
    kb = (kb_type == "patterns" ? Scrappy::Kb.patterns : Scrappy::Kb.extractors)
    @results   = {}
    @missing   = []
    @wrong     = []
    output     = RDF::Parser.parse(:ntriples, params["output"].to_s).triples
    extraction = []
    (params['samples'] || []).each do |i|
      sample      = Scrappy::App.samples[i.to_i]
      output     += sample[:output] || []
      extraction += agent.extract(sample[:uri], sample[:html], kb)
    end
    
    output     = output.uniq
    extraction = extraction.uniq

    predicates = output.map { |s,p,o| p }.uniq
    types      = output.map { |s,p,o| o if p == ID('rdf:type') }.compact.uniq

    predicates.each do |predicate|
      new_output     = output.select     { |s,p,o| p==predicate }
      new_extraction = extraction.select { |s,p,o| p==predicate }
      precision, recall, fscore = agent.send :metrics, new_output, new_extraction
      @results[predicate] ||= Hash.new(0.0)
      @results[predicate][:count]     += 1
      @results[predicate][:triples]    = new_output.size
      @results[predicate][:fscore]    += fscore
      @results[predicate][:precision] += precision
      @results[predicate][:recall]    += recall
    end
    
    types.each do |type|
      new_output     = output.select     { |s,p,o| p==ID("rdf:type") and o==type }
      new_extraction = extraction.select { |s,p,o| p==ID("rdf:type") and o==type }

      precision, recall, fscore = agent.send :metrics, new_output, new_extraction
      @results[type] ||= Hash.new(0.0)
      @results[type][:count]     += 1
      @results[type][:triples]    = new_output.size
      @results[type][:fscore]    += fscore
      @results[type][:precision] += precision
      @results[type][:recall]    += recall
    end
    
    precision, recall, fscore = agent.send :metrics, output, extraction
    @results[:total] ||= Hash.new(0.0)
    @results[:total][:count]     += 1
    @results[:total][:triples]    = output.size
    @results[:total][:fscore]    += fscore
    @results[:total][:precision] += precision
    @results[:total][:recall]    += recall

    @missing += output     - extraction
    @wrong   += extraction - output

    # Here we get sth like: { :'dc:title'=>{:fscore=>0.3, ...}, :total=>{:fscore=>0.4, ...} }
    @results.each do |key, result|
      count = result[:count]
      result.each do |k,v|
        result[k] /= count
      end
    end
    
    @total      = output.size
    @extracted  = extraction.size
    @correct    = @extracted - @wrong.size
    
    @missing    = RDF::Graph.new(@missing)
    @wrong      = RDF::Graph.new(@wrong)
    
    flash.now[:notice] = "Testing completed"
    haml :test
  end

  app.post '/samples' do
    html   = Iconv.iconv('UTF-8', params[:encoding], params[:html]).first
    sample = Scrappy::App.add_sample(:html=>html, :uri=>params[:uri], :date=>Time.now)
    flash[:notice] = "Sample stored"
    redirect "#{settings.base_uri}/samples"
  end
  
  app.delete '/samples/:id' do |id|
    Scrappy::App.delete_sample id.to_i
    flash[:notice] = "Sample deleted"
    redirect "#{settings.base_uri}/samples"
  end
  
  def render_fragment fragment, selected_branch=nil
    label = if fragment.sc::relation.first
      fragment.sc::relation.map {|id| RDF::ID.compress(id)} * ', '
    else
      fragment.sc::type.map {|id| RDF::ID.compress(id)} * ', '
    end
    subfragments = [selected_branch || [:min, :max]].flatten.map do |branch|
      fragment.sc::subfragment.map { |f| render_fragment(f, branch) } * ""
    end * ""

    [selected_branch || [:min, :max]].flatten.map do |branch|
      fragment.sc::selector.map do |selector|
        x,y,w,h,font,size,weight,color = case branch
        when :min then
          [selector.sc::min_relative_x.first, selector.sc::min_relative_y.first, selector.sc::min_width.first, selector.sc::min_height.first, selector.sc::font_family.first, selector.sc::min_font_size.first, selector.sc::min_font_weight.first, :blue]
        when :max then
          [selector.sc::max_relative_x.first, selector.sc::max_relative_y.first, selector.sc::max_width.first, selector.sc::max_height.first, selector.sc::font_family.first, selector.sc::max_font_size.first, selector.sc::max_font_weight.first, :red]
        end
        style = "position: absolute; left: #{x}px; top: #{y}px; width: #{w}px; height: #{h}px; font-family: #{font}; font-size: #{size}px; font-weight: #{weight}; border: 1px solid #{color}; color: #555;"
        "<div style='#{style}'>#{label}#{subfragments}</div>"
      end * ""
    end * ""
  end
  
  def percentage value
    "%.2f%" % (value * 100.0)
  end
  
  app.helpers Admin
end

Instance Method Details

#percentage(value) ⇒ Object 



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# File 'lib/scrappy/server/admin.rb', line 278

def percentage value
  "%.2f%" % (value * 100.0)
end

#render_fragment(fragment, selected_branch = nil) ⇒ Object 



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# File 'lib/scrappy/server/admin.rb', line 254

def render_fragment fragment, selected_branch=nil
  label = if fragment.sc::relation.first
    fragment.sc::relation.map {|id| RDF::ID.compress(id)} * ', '
  else
    fragment.sc::type.map {|id| RDF::ID.compress(id)} * ', '
  end
  subfragments = [selected_branch || [:min, :max]].flatten.map do |branch|
    fragment.sc::subfragment.map { |f| render_fragment(f, branch) } * ""
  end * ""

  [selected_branch || [:min, :max]].flatten.map do |branch|
    fragment.sc::selector.map do |selector|
      x,y,w,h,font,size,weight,color = case branch
      when :min then
        [selector.sc::min_relative_x.first, selector.sc::min_relative_y.first, selector.sc::min_width.first, selector.sc::min_height.first, selector.sc::font_family.first, selector.sc::min_font_size.first, selector.sc::min_font_weight.first, :blue]
      when :max then
        [selector.sc::max_relative_x.first, selector.sc::max_relative_y.first, selector.sc::max_width.first, selector.sc::max_height.first, selector.sc::font_family.first, selector.sc::max_font_size.first, selector.sc::max_font_weight.first, :red]
      end
      style = "position: absolute; left: #{x}px; top: #{y}px; width: #{w}px; height: #{h}px; font-family: #{font}; font-size: #{size}px; font-weight: #{weight}; border: 1px solid #{color}; color: #555;"
      "<div style='#{style}'>#{label}#{subfragments}</div>"
    end * ""
  end * ""
end