Class: Faraday::Adapter::EMSynchrony

Inherits:
Faraday::Adapter show all
Defined in:
lib/faraday/adapter/em_synchrony.rb,
lib/faraday/adapter/em_synchrony/parallel_manager.rb

Defined Under Namespace

Classes: ParallelManager

Constant Summary

Constants inherited from Faraday::Adapter

CONTENT_LENGTH

Instance Attribute Summary

Attributes included from Parallelism

#supports_parallel

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Faraday::Adapter

#prepend_proxy_auth_string, #save_response

Methods included from Faraday::AutoloadHelper

#all_loaded_constants, #autoload_all, #load_autoloaded_constants

Methods included from MiddlewareRegistry

#lookup_middleware, #register_middleware

Methods included from Parallelism

#inherited, #supports_parallel?

Methods inherited from Middleware

dependency, inherited, #initialize, loaded?, new

Constructor Details

This class inherits a constructor from Faraday::Middleware

Class Method Details

.setup_parallel_manager(options = {}) ⇒ Object 



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# File 'lib/faraday/adapter/em_synchrony.rb', line 15

def self.setup_parallel_manager(options = {})
  ParallelManager.new
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/faraday/adapter/em_synchrony.rb', line 19

def call(env)
  super
  request = EventMachine::HttpRequest.new(URI::parse(env[:url].to_s))
  options = {:head => env[:request_headers]}
  options[:ssl] = env[:ssl] if env[:ssl]

  if env[:body]
    if env[:body].respond_to? :read
      options[:body] = env[:body].read
    else
      options[:body] = env[:body]
    end
  end

  if req = env[:request]
    if proxy = req[:proxy]
      uri = URI.parse(proxy[:uri])
      options[:proxy] = {
        :host => uri.host,
        :port => uri.port
      }
      if proxy[:username] && proxy[:password]
        options[:proxy][:authorization] = [proxy[:username], proxy[:password]]
      end
    end

    # only one timeout currently supported by em http request
    if req[:timeout] or req[:open_timeout]
      options[:timeout] = [req[:timeout] || 0, req[:open_timeout] || 0].max
    end
  end

  http_method = env[:method].to_s.downcase.to_sym

  # Queue requests for parallel execution.
  if env[:parallel_manager]
    env[:parallel_manager].add(request, http_method, options) do |resp|
      save_response(env, resp.response_header.status, resp.response) do |resp_headers|
        resp.response_header.each do |name, value|
          resp_headers[name.to_sym] = value
        end
      end

      # Finalize the response object with values from `env`.
      env[:response].finish(env)
    end

  # Execute single request.
  else
    client = nil
    block = lambda { request.send(http_method, options) }

    if !EM.reactor_running?
      EM.run do
        Fiber.new {
          client = block.call
          EM.stop
        }.resume
      end
    else
      client = block.call
    end

    save_response(env, client.response_header.status, client.response) do |resp_headers|
      client.response_header.each do |name, value|
        resp_headers[name.to_sym] = value
      end
    end
  end

  @app.call env
rescue Errno::ECONNREFUSED
  raise Error::ConnectionFailed, $!
end