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: Lookup, Node

Class Method Summary collapse

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 13

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

Class Method Details

.response_body_to_str(response_body) ⇒ Object 



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# File 'lib/esi_for_rack.rb', line 18

def self.response_body_to_str(response_body)
  if response_body.respond_to? :to_str
    response_body.to_str
  elsif response_body.respond_to?(:each)
    body = ''
    response_body.each { |part|
      body << part.to_s
    }
    body
  else
    raise TypeError, "stringable or iterable required"
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/esi_for_rack.rb', line 32

def call(env)
  @lookup ||= [Lookup::PassThrough.new(@app, env), Lookup::Http.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 = EsiForRack.response_body_to_str(result.last)) && body.index('<esi:')
    user_agent_hash = {}
    begin
      user_agent = SOC::SpyVsSpy.new(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.version.major, user_agent.version.minor].compact.join('.')
      
      user_agent_hash['os'] = if user_agent.os.windows?
        'WIN'
      elsif user_agent.os.osx?
        'MAC'
      else
        'OTHER'
      end
    rescue
      # error parsing ua
    end
    
    binding = {
      :HTTP_ACCEPT_LANGUAGE => Set.new((env['HTTP_ACCEPT_LANGUAGE'] || '').split(',').map{|l| l.gsub(/q=[0-9]\.[0-9]{1,3}/, '').gsub(';','').strip}),
      :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)
    
    parsed_body = context.parse(body).to_s
    response.header['Content-Length'] = parsed_body.size.to_s
    
    [response.status, response.headers, [parsed_body]]
  else
    result
  end
  
end