Class: Sequence::HttpWrapper

Inherits:
Object
  • Object
show all
Defined in:
lib/sequence/http_wrapper.rb

Constant Summary collapse

RETRY_BASE_DELAY_MS =

Parameters to the retry exponential backoff function.

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RETRY_MAX_DELAY_MS = 
20_000
RETRY_TIMEOUT_SECS =

2 minutes

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NETWORK_ERRORS = 
[
  InvalidRequestIDError,
  SocketError,
  EOFError,
  IOError,
  Timeout::Error,
  Errno::ECONNABORTED,
  Errno::ECONNRESET,
  Errno::ETIMEDOUT,
  Errno::EHOSTUNREACH,
  Errno::ECONNREFUSED,
].freeze

Instance Method Summary collapse

Constructor Details

#initialize(base_url, credential, opts = {}) ⇒ HttpWrapper

Returns a new instance of HttpWrapper.



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# File 'lib/sequence/http_wrapper.rb', line 29

def initialize(base_url, credential, opts = {})
  @mutex = Mutex.new
  @base_url = URI(base_url)
  @credential = credential
  @opts = opts
  @connection = setup_connection
end

Instance Method Details

#post(id, url, body) ⇒ Object 



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# File 'lib/sequence/http_wrapper.rb', line 37

def post(id, url, body)
  start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  attempts = 0
  idempotency_key = SecureRandom.uuid
  begin
    attempts += 1
    # If this is a retry and not the first attempt, sleep before making the
    # retry request.
    sleep(backoff_delay(attempts)) if attempts > 1

    attempt_id = "#{id}/#{attempts}"
    @mutex.synchronize do
      req = Net::HTTP::Post.new(url)
      req.body = JSON.dump(body)
      req['Accept'] = 'application/json'
      req['Content-Type'] = 'application/json'
      req['Id'] = attempt_id
      req['Idempotency-Key'] = idempotency_key
      req['Name-Set'] = 'snake'
      req['User-Agent'] = 'sequence-sdk-ruby/' + Sequence::VERSION
      req['Credential'] = @credential
      if !@opts[:user].nil? && !@opts[:pass].nil?
        req.basic_auth(@opts[:user], @opts[:pass])
      end
      unless @connection.started?
        @connection.start
      end
      response = @connection.request(req)

      if block_given?
        yield response
      end

      # We must parse any APIErrors here so that
      # the retry logic can handle them.
      status = Integer(response.code)
      parsed_body = nil
      if status != 204 # No Content
        begin
          parsed_body = JSON.parse(response.body)
        rescue JSON::JSONError
          raise JSONError.new(attempt_id, response)
        end
      end
      if status / 100 != 2
        status == 401 ? klass = UnauthorizedError : klass = APIError
        raise klass.new(parsed_body, response)
      end

      { parsed_body: parsed_body, response: response }
    end
  rescue *NETWORK_ERRORS => e
    raise e if elapsed_secs(start_time) > RETRY_TIMEOUT_SECS
    retry
  rescue APIError => e
    raise e unless e.retriable?
    raise e if elapsed_secs(start_time) > RETRY_TIMEOUT_SECS
    retry
  end
end