Class: ESI::Proxy

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

Constant Summary collapse

SERVER = 
"mongrel-esi/#{ESI::VERSION::STRING}"

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Log

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

Constructor Details

#initialize(config) ⇒ Proxy

Returns a new instance of Proxy.



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# File 'lib/esi/proxy.rb', line 21

def initialize( config )
  @config = config
  @router = config.router
  @cache_buffer = nil
end

Instance Attribute Details

#cache_buffer ⇒ Object (readonly)

Returns the value of attribute cache_buffer.



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# File 'lib/esi/proxy.rb', line 17

def cache_buffer
  @cache_buffer
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/esi/proxy.rb', line 17

def config
  @config
end

#router ⇒ Object (readonly)

Returns the value of attribute router.



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# File 'lib/esi/proxy.rb', line 17

def router
  @router
end

Instance Method Details

#process(request, response) ⇒ Object 



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# File 'lib/esi/proxy.rb', line 27

def process(request, response)
 
  start = Time.now
  status = 200

  http_params = http_params(request.params)

  url = @router.url_for(request.params["REQUEST_URI"])
  #log_debug "#{request.params["REQUEST_METHOD"]} => #{url}"
  chunk_count = 0
  bytes_sent = 0
  uri = URI.parse(url)

  path_with_query = uri.query ? "#{uri.path}?#{uri.query}" :  uri.path
 
  if @config.cache.cached?( path_with_query, http_params )
    cache_buffer = @config.cache.get( path_with_query, http_params ).body
    bytes_sent = send_esi_buffered( status, response, request, http_params, cache_buffer )
  else
    proxy_request = (request.params["REQUEST_METHOD"] == "POST") ?
                        Net::HTTP::Post.new( path_with_query, http_params ) :
                        Net::HTTP::Get.new( path_with_query, http_params )

    # open the conneciton up so we can start to stream the connection
    Net::HTTP.start(uri.host, uri.port).request(proxy_request,request.body.read) do|proxy_response|
      chunk_count,bytes_sent = send_response( request, response, http_params, proxy_response )
    end # end request
 
    if !@control.nil? and !@cache_buffer.nil? and @control['max-age'].to_i > 0 and @cache_buffer.size > 0
      @cache_buffer.rewind
      @config.cache.put(path_with_query, http_params, @control['max-age'].to_i, @cache_buffer.read )
    end

  end

rescue => e
  STDERR.puts "\n#{e.message}: error at #{e.backtrace.first} msg at #{__FILE__}:#{__LINE__}\n"
ensure
  log_request "\n#{url}, #{Time.now - start} seconds with status #{status} and #{chunk_count} chunks, #{bytes_sent} bytes\n"
end