Module: HTTP

Defined in:
lib/HTTP/VERSION.rb,
lib/HTTP/RETRY.rb,
lib/HTTP/verbs.rb,
lib/HTTP/request.rb

Overview

HTTP/VERSION.rb HTTP::VERSION

Defined Under Namespace

Modules: RETRY, VERBS

Constant Summary collapse

VERSION = 
'1.0.0'

Class Method Summary collapse

Class Method Details

.backoff_delay(base, attempt) ⇒ Object 



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# File 'lib/HTTP/RETRY.rb', line 60

def backoff_delay(base, attempt)
  base * (2 ** (attempt - 1)) * (1 + (rand - 0.5) * 0.4)
end

.request(uri, request_object, headers = {}, options = {}, &block) ⇒ Object 



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# File 'lib/HTTP/request.rb', line 15

def request(uri, request_object, headers = {}, options = {}, &block)
  uri = uri.is_a?(URI) ? uri : URI.parse(uri)
  http = Net::HTTP.new(uri.host, uri.port)
  no_redirect = options.delete(:no_redirect)
  config = retry_config(options)
  http.options = options.merge(
    use_ssl: (options[:use_ssl] || uri.use_ssl?),
    verify_mode: (options[:verify_mode] || OpenSSL::SSL::VERIFY_PEER)
  )
  request_object.headers = headers
  request_object.basic_auth(uri.user, uri.password) if uri.user
  verb = request_object.method.downcase.to_sym
  response = (
    if config[:retries] > 0 && config[:verbs].include?(verb)
      with_retries(http, request_object, config)
    else
      http.request(request_object)
    end
  )
  if response.code =~ /^3/
    if block_given? && no_redirect
      yield response
    elsif no_redirect
      return response
    end
    redirect_uri = uri.merge(response['location'])
    if response.code =~ /^30[78]$/
      data = VERBS::WITH_BODY.include?(verb) ? request_object.body : {}
      response = send(verb, redirect_uri.to_s, data, headers, options, &block)
    else
      response = get(redirect_uri.to_s, {}, {}, options, &block)
    end
  end
  if block_given?
    yield response
  else
    response
  end
end

.retry_after(response) ⇒ Object 



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# File 'lib/HTTP/RETRY.rb', line 65

def retry_after(response)
  header = response['Retry-After']
  return nil unless header
  if header =~ /\A\d+\z/
    header.to_i
  else
    # Malformed HTTP-date — fall through to caller's backoff.
    delta = Time.httpdate(header) - Time.now rescue nil
    delta && [delta, 0].max
  end
end

.retry_config(options) ⇒ Object 



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# File 'lib/HTTP/RETRY.rb', line 29

def retry_config(options)
  {
    retries: options.delete(:retries) || 0,
    delay: options.delete(:retry_delay) || 1.0,
    status_codes: options.delete(:retry_status_codes) || RETRY::STATUS_CODES,
    exceptions: options.delete(:retry_exceptions) || RETRY::EXCEPTIONS,
    verbs: options.delete(:retry_verbs) || RETRY::VERBS
  }
end

.with_retries(http, request_object, config) ⇒ Object 



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# File 'lib/HTTP/RETRY.rb', line 40

def with_retries(http, request_object, config)
  attempt = 0
  loop do
    begin
      response = http.request(request_object)
      if config[:status_codes].include?(response.code.to_i) && attempt < config[:retries]
        attempt += 1
        RETRY.sleep(retry_after(response) || backoff_delay(config[:delay], attempt))
        next
      end
      return response
    rescue *config[:exceptions]
      raise unless attempt < config[:retries]
      attempt += 1
      RETRY.sleep(backoff_delay(config[:delay], attempt))
    end
  end
end