Class: Rack::Prevoty::ProtectInterceptor

Inherits:
Interceptor show all
Defined in:
lib/rack/protect_interceptor.rb

Instance Method Summary collapse

Methods inherited from Interceptor

build_result

Constructor Details

#initialize(app, opts) ⇒ ProtectInterceptor 



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# File 'lib/rack/protect_interceptor.rb', line 8

def initialize(app, opts)
  super(app, opts)
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/protect_interceptor.rb', line 12

def call(env)
  req = Rack::Request.new(env)

  # passthru if not listed in paths
  return @app.call(env) if @paths.detect {|p| req.path.start_with?(p)}.nil?

  # passthru if blacklisted
  return @app.call(env) unless @blacklist.detect {|p| req.path.start_with?(p)}.nil?

  case req.request_method
  when "GET", "DELETE"
    unless env['QUERY_STRING'] === ''
      querystring = URI.unescape(env['QUERY_STRING'])
      begin
        Timeout::timeout(@timeout) do
          resp = @client.bulk_filter(querystring, @configuration_key)
          env['QUERY_STRING'] = URI.escape(resp.output)
          case @log_destination
          when 'log'
            ::Prevoty::LOGGER << self.class.build_result(@mode, req, querystring, resp).to_json if resp.statistics.javascript_attributes > 0 || resp.statistics.javascript_protocols > 0 || resp.statistics.javascript_tags > 0
          when 'callback'
            @callback.call(self.class.build_result(@mode, req, querystring, resp).to_json) if !@callback.nil? && (resp.statistics.javascript_attributes > 0 || resp.statistics.javascript_protocols > 0 || resp.statistics.javascript_tags > 0)
          end
        end
      rescue Exception => e
        env['QUERY_STRING'] = escape_query(CGI::parse(querystring))
        Rails.logger.warn e.message
      end
    end
  when "POST", "PUT"
    if req.media_type === 'multipart/form-data'
      # TODO: implement support for multipart. The Rack multipart
      # implementation doesn't support parsing and re-creating the
      # mutlipart data so a custom implementation needs to be written
    else
      body = URI.unescape(req.body.read.encode('utf-8'))
      unless body === ''
        begin
          Timeout::timeout(@timeout) do
            resp = @client.bulk_filter(body, @configuration_key)
            env['rack.input'] = StringIO.new(resp.output)
            case @log_destination
            when 'log'
              ::Prevoty::LOGGER << self.class.build_result(@mode, req, body, resp).to_json if resp.statistics.javascript_attributes > 0 || resp.statistics.javascript_protocols > 0 || resp.statistics.javascript_tags > 0
            when 'callback'
              @callback.call(self.class.build_result(@mode, req, body, resp).to_json) if !@callback.nil? && (resp.statistics.javascript_attributes > 0 || resp.statistics.javascript_protocols > 0 || resp.statistics.javascript_tags > 0)
            end
          end
        rescue Exception => e
          env['rack.input'] = StringIO.new(escape_query(CGI::parse(body)))
          Rails.logger.warn e.message
        end
      end
    end

    # clean any GET data passed
    unless env['QUERY_STRING'] === ''
      querystring = URI.unescape(env['QUERY_STRING'])
      begin
        Timeout::timeout(@timeout) do
          resp = @client.bulk_filter(querystring, @configuration_key)
          env['QUERY_STRING'] = URI.escape(resp.output)
          case @log_destination
          when 'log'
            ::Prevoty::LOGGER << self.class.build_result(@mode, req, querystring, resp).to_json if resp.statistics.javascript_attributes > 0 || resp.statistics.javascript_protocols > 0 || resp.statistics.javascript_tags > 0
          when 'callback'
            @callback.call(self.class.build_result(@mode, req, querystring, resp).to_json) if !@callback.nil? && (resp.statistics.javascript_attributes > 0 || resp.statistics.javascript_protocols > 0 || resp.statistics.javascript_tags > 0)
          end
        end
      rescue Exception => e
        env['QUERY_STRING'] = escape_query(CGI::parse(querystring))
        Rails.logger.warn e.message
      end
    end
  else Rails.logger.warn "unknown method #{req.request_method}"
  end

  @app.call(env)
end