Class: ThreadedProxy::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/threaded_proxy/client.rb

Constant Summary collapse

DISALLOWED_RESPONSE_HEADERS = 
%w[keep-alive]
METHODS = 
{
  'get' => Net::HTTP::Get,
  'post' => Net::HTTP::Post,
  'put' => Net::HTTP::Put,
  'delete' => Net::HTTP::Delete,
  'head' => Net::HTTP::Head,
  'options' => Net::HTTP::Options,
  'trace' => Net::HTTP::Trace
}
DEFAULT_OPTIONS = 
{
  headers: {},
  debug: false
}

Instance Method Summary collapse

Constructor Details

#initialize(origin_url, options = {}) ⇒ Client

Returns a new instance of Client.



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# File 'lib/threaded_proxy/client.rb', line 24

def initialize(origin_url, options={})
  @origin_url = Addressable::URI.parse(origin_url)
  @options = DEFAULT_OPTIONS.merge(options)
end

Instance Method Details

#default_port(uri) ⇒ Object 



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# File 'lib/threaded_proxy/client.rb', line 77

def default_port(uri)
  case uri.scheme
  when 'http'
    80
  when 'https'
    443
  else
    nil
  end
end

#log(message) ⇒ Object 



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# File 'lib/threaded_proxy/client.rb', line 29

def log(message)
  $stderr.puts message if @options[:debug]
end

#start(socket) ⇒ Object 



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# File 'lib/threaded_proxy/client.rb', line 33

def start(socket)
  request_method = METHODS[(@options[:method] || 'GET').to_s.downcase]
  http_request = request_method.new(@origin_url, @options[:headers].merge('Connection' => 'close'))
  if @options[:body].respond_to?(:read)
    http_request.body_stream = @options[:body]
  elsif String === @options[:body]
    http_request.body = @options[:body]
  end

  http = HTTP.new(@origin_url.host, @origin_url.port || default_port(@origin_url))
  http.use_ssl = (@origin_url.scheme == 'https')
  http.set_debug_output($stderr) if @options[:debug]
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE if @options[:ignore_ssl_errors]

  http.start do
    http.request(http_request) do |client_response|
      # We don't support reusing connections once we have disconnected them from rack
      client_response['connection'] = 'close'

      yield client_response if block_given?

      # start writing response
      log("Writing response status and headers")
      socket.write "HTTP/1.1 #{client_response.code} #{client_response.message}\r\n"

      client_response.each_header do |key, value|
        socket.write "#{key}: #{value}\r\n" unless DISALLOWED_RESPONSE_HEADERS.include?(key.downcase)
      end

      # Done with headers
      socket.write "\r\n"

      # There may have been some existing data in client_response's read buffer, flush it out
      # before we manually connect the raw sockets
      log("Flushing existing response buffer to client")
      http.flush_existing_buffer_to(socket)

      # Copy the rest of the client response to the socket
      log("Copying response body to client")
      http.copy_to(socket)
    end
  end
end