Class: Songkick::Transport::Curb

Inherits:
Base
  • Object
show all
Defined in:
lib/songkick/transport/curb.rb

Constant Summary collapse

DEFAULT_HEADERS =

Send this so that curb will not implement Section 8.2.3 of RFC 2616, which our Ruby HTTP servers are not equipped to respond to. (If not sent it causes an additional 1s of latency for all requests with post data longer than 1k)

{"Expect" => ""}

Constants inherited from Base

Base::DEFAULT_INSTRUMENTATION_LABEL

Instance Attribute Summary

Attributes inherited from Base

#basic_auth, #host, #instrumenter, #timeout, #user_agent, #user_error_codes

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#do_verb

Methods included from Base::API

#delete, #get, #head, #options, #patch, #post, #put, #with_basic_auth, #with_headers, #with_params, #with_timeout

Constructor Details

#initialize(host, options = {}) ⇒ Curb

Returns a new instance of Curb.



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# File 'lib/songkick/transport/curb.rb', line 19

def initialize(host, options = {})
  super(host, options)
  @no_signal  = !!options[:no_signal]
  Thread.current[:transport_curb_easy] ||= options[:connection]
end

Class Method Details

.clear_thread_connection ⇒ Object 



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# File 'lib/songkick/transport/curb.rb', line 15

def self.clear_thread_connection
  Thread.current[:transport_curb_easy] = nil
end

Instance Method Details

#connection ⇒ Object 



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# File 'lib/songkick/transport/curb.rb', line 25

def connection
  Thread.current[:transport_curb_easy] ||= Curl::Easy.new
end

#execute_request(req) ⇒ Object 



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# File 'lib/songkick/transport/curb.rb', line 37

def execute_request(req)
  self.instrumentation_payload_extras = {} if self.instrumenter
  connection.reset

  connection.url     = req.url
  timeout            = req.timeout || @timeout
  connection.timeout = timeout
  connection.encoding = ''
  connection.headers.update(DEFAULT_HEADERS.merge(req.headers))
  connection.nosignal = true if @no_signal

  response_headers = {}

  connection.on_header do |header_line|
    line = header_line.sub(/\r\n$/, '')
    parts = line.split(/:\s*/)
    if parts.size >= 2
      header_name, value = parts.shift, parts * ':'
      if response_headers[header_name]
        response_headers[header_name] << ", #{value}"
      else
        response_headers[header_name] = value
      end
    end
    header_line.bytesize
  end

  if req.use_body?
    connection.__send__("http_#{req.verb}", req.body)
  else
    connection.http(req.verb.upcase)
  end

  if self.instrumenter
    self.instrumentation_payload_extras[:connect_time] = connection.connect_time
    self.instrumentation_payload_extras[:name_lookup_time] = connection.name_lookup_time
  end

  process(req, connection.response_code, response_headers, connection.body_str)

rescue Curl::Err::HostResolutionError => error
  logger.warn "Could not resolve host: #{@host}"
  raise Transport::HostResolutionError, req

rescue Curl::Err::ConnectionFailedError => error
  logger.warn "Could not connect to host: #{@host}"
  raise Transport::ConnectionFailedError, req

rescue Curl::Err::TimeoutError => error
  logger.warn "Request timed out after #{timeout}s : #{req}"
  raise Transport::TimeoutError, req

rescue Curl::Err::GotNothingError => error
  logger.warn "Got nothing: #{req}"
  raise Transport::UpstreamError, req

rescue Curl::Err::RecvError => error
  logger.warn "Failure receiving network data: #{error.message} : #{req}"
  raise Transport::UpstreamError, req

end

#instrumentation_payload_extras ⇒ Object 



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# File 'lib/songkick/transport/curb.rb', line 29

def instrumentation_payload_extras
  Thread.current[:transport_curb_payload_extras] ||= {}
end

#instrumentation_payload_extras=(extras) ⇒ Object 



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# File 'lib/songkick/transport/curb.rb', line 33

def instrumentation_payload_extras=(extras)
  Thread.current[:transport_curb_payload_extras] = {}
end