Class: ESI::Processor

Inherits:
Object
  • Object
show all
Includes:
Log
Defined in:
lib/esi/processor.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Log

#log, #log_debug, #log_error, #log_request, #msg

Constructor Details

#initialize(config, router, cache_buffer = nil) ⇒ Processor

Returns a new instance of Processor.



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# File 'lib/esi/processor.rb', line 11

def initialize( config, router, cache_buffer = nil )
  @config = config
  @router = router
  @chunk_count = 0
  @chunk_size = @config[:chunk_size] || 4096
  @bytes_sent = 0
  @max_depth = @config[:max_depth] || 3
  @chunk_buffer = StringIO.new # when buffer reaches chunk_size write to the http_response socket
  @parser = ESI::Parser.new( @chunk_buffer, @router, @config.cache, @max_depth )
  @cache_buffer = cache_buffer
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/esi/processor.rb', line 7

def config
  @config
end

#router ⇒ Object (readonly)

Returns the value of attribute router.



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# File 'lib/esi/processor.rb', line 7

def router
  @router
end

Instance Method Details

#send_body(http_request, params, http_response, proxy_response) ⇒ Object 



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# File 'lib/esi/processor.rb', line 23

def send_body( http_request, params, http_response, proxy_response )
  
  @http_response = http_response

  # prepare the parser given the raw request params and the preprocessed request params
  @parser.prepare( http_request.params, params )

  # feed data to the parser
  proxy_response.read_body do |data|
    @parser.process data
    @cache_buffer << data if @cache_buffer
    if @chunk_buffer.size > @chunk_size
      send_chunk
      @chunk_buffer = StringIO.new
      @parser.response.update_output( @chunk_buffer )
    end
  end

  @parser.finish 

  send_chunk

  [@chunk_count,@bytes_sent]
rescue => e
  STDERR.puts "\n#{e.message}: #{e.backtrace.join("\n")}\n"
ensure 
  http_response.write( "0\r\n\r\n" )
  http_response.done = true if http_response.respond_to?(:done)
end

#send_chunk ⇒ Object 



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# File 'lib/esi/processor.rb', line 53

def send_chunk
  @chunk_buffer.rewind
  size = @chunk_buffer.size
  chunk_header = "#{"%x" % size}" + Mongrel::Const::LINE_END
  #print chunk_header
  @http_response.write( chunk_header )  # write the chunk size
  @http_response.write( @chunk_buffer.read + Mongrel::Const::LINE_END )  # write the chunk
  @bytes_sent += size

  @chunk_count += 1
end