Class: ICAPrb::Server::FilterService

Inherits:
Services::ServiceBase
  • Object
show all
Defined in:
lib/icaprb/filter/service.rb

Overview

The filter service, reference in your startup script

Instance Method Summary collapse

Constructor Details

#initialize(path, timeout = nil) ⇒ FilterService

Load configuration for filter service

path

Path to the configuration file



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# File 'lib/icaprb/filter/service.rb', line 12

def initialize(path, timeout=nil)
  super('filter',[:request_mod, :response_mod],nil,60,nil,nil,nil,1000)
  @timeout = timeout
  @request_list, @response_list = ::ICAPrb::Filter.load_filters(path)
end

Instance Method Details

#process_request(icap_server, ip, socket, data) ⇒ Object

Process a new filter request icap_server: ICAP server data

ip

IP

socket

Socket

data

Data for the current request



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# File 'lib/icaprb/filter/service.rb', line 22

def process_request(icap_server,ip,socket,data)
  logger = icap_server.logger
  ICAPrb::Filter.set_logger(logger)
  ICAPrb::Filters.set_logger(logger)
  logger.debug '==========================================='
  logger.debug 'Start processing data via filter service...'
  logger.debug 'Request url: ' + data[:http_request_header]["Host"].to_s

  #logger.debug data
  # Go through all filters for resp or req
  begin
    response = ::ICAPrb::Server::Response.new
    is_modified = false
    if data[:icap_data][:request_line][:icap_method] == :request_mod
      logger.debug('Event is REQUEST')
      @request_list.each do |entry|
        logger.debug('Executing filter: ' + entry[:name].to_s)
        filter_return_value = entry[:object].plugin(data)
        if [true, false].include? filter_return_value
          is_modified = (filter_return_value || is_modified)
          logger.debug("Filter return value: " + filter_return_value.to_s)
        else
          logger.error("Filter " + entry[:name] + ' has illegal return value')
        end
      end
    elsif data[:icap_data][:request_line][:icap_method] == :response_mod
      logger.debug('Event is RESPONSE')
      @response_list.each  do |entry|
        logger.debug('Executing plugin: ' + entry[:name].to_s)
        plugin_return_value = entry[:object].plugin(data)
        if [true, false].include? plugin_return_value
          is_modified = (plugin_return_value || is_modified)
          logger.debug("Plugin return value: " + plugin_return_value.to_s)
        else
          logger.error("Plugin " + entry[:name] + ' has illegal return value')
        end
      end
    end
    if is_modified
      logger.debug('Data was modified, sending everything')
    else
      logger.debug('Data is unmodified, sending status code 204')
    end
    # Nothing changed
    unless is_modified
      # Send 204 (unmodified) flag, no content required
      response.icap_status_code = 204
      response.write_headers_to_socket socket
      return
    end
    # Something changed
    if data[:icap_data][:request_line][:icap_method] == :response_mod
      http_header = data[:http_response_header]
      if data[:http_response_body]
        http_body = ICAPrb::Server::ResponseBody.new(data[:http_response_body])
        http_header['Content-Length'] = http_body.length
      end
    else
      http_header = data[:http_request_header]
      if data[:http_request_body]
        http_body = ICAPrb::Server::RequestBody.new(data[:http_request_body])
        http_header['Content-Length'] = http_body.length
      end
    end

    response.components << http_header
    response.components << http_body if http_body
    response.icap_status_code = 200
    response.write_headers_to_socket socket
    socket.write(http_body.to_chunk)
    ::ICAPrb::Server::Response.send_last_chunk(socket,false)
  rescue StandardError => error
    logger.warn 'Error in filter framework'
    logger.warn error.message
    logger.warn error.backtrace
    logger.warn error.backtrace_locations
    # Don't anger the consumer
    response = ::ICAPrb::Server::Response.new
    response.icap_status_code = 204
    response.write_headers_to_socket socket
  end
  logger.debug '==========================================='
end