Class: EsiForRack

Inherits:
Object
  • Object
show all
Defined in:
lib/esi_for_rack.rb,
lib/esi_for_rack/node.rb,
lib/esi_for_rack/lookup.rb

Defined Under Namespace

Classes: IOWrapper, Lookup, Node

Instance Method Summary collapse

Constructor Details

#initialize(app, lookup = nil) ⇒ EsiForRack

Returns a new instance of EsiForRack.



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# File 'lib/esi_for_rack.rb', line 12

def initialize(app, lookup = nil)
  @app = app
  @lookup = lookup
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/esi_for_rack.rb', line 17

def call(env)
  @lookup ||= Lookup::PassThrough.new(@app, env)
  
  request = Rack::Request.new(env)
  result = @app.call(env)
  response = Rack::Response.new(result[2], result[0], result[1])

  if response['Content-Type'] =~ /text\/html/
    body = ""
    response.body.each do |part|
      body << part
    end
    
    user_agent_hash = {}
    begin
      user_agent = ParseUserAgent.new.parse(env['HTTP_USER_AGENT'] || '-')
      user_agent_hash['browser'] = case user_agent.browser
      when  'Firefox' then 'MOZILLA'
      when  'MSIE'    then 'MSIE'
      else;                'OTHER'
      end

      user_agent_hash['version'] = user_agent.browser_version_major

      user_agent_hash['os'] = case user_agent.ostype
      when  'Windows'   then 'WIN'
      when  'Macintosh' then 'MAC'
      else;                  'OTHER'
      end

    rescue
      # error parsing ua
    end
    
    
    
    binding = {
      :HTTP_ACCEPT_LANGUAGE => Set.new((env['HTTP_ACCEPT_LANGUAGE'] || '').split(',').map{|l| l.strip.gsub(/q=[0-9]\.[0-9]{1,3}/, '').gsub(';','')}),
      :HTTP_COOKIE => request.cookies,
      :HTTP_HOST => request.host,
      :HTTP_REFERER => request.referer,
      :HTTP_USER_AGENT => user_agent_hash,
      :QUERY_STRING => request.GET
    }
    context = Node::Context.new(binding, @lookup)
    [response.status, response.headers, [context.parse(body).to_s]]
  else
    result
  end
  
end