Class: Statsig::Network

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

Instance Method Summary collapse

Constructor Details

#initialize(server_secret, options, backoff_mult = 10) ⇒ Network

Returns a new instance of Network.



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# File 'lib/network.rb', line 21

def initialize(server_secret, options, backoff_mult = 10)
  super()
  @options = options
  @server_secret = server_secret
  @local_mode = options.local_mode
  @timeout = options.network_timeout
  @backoff_multiplier = backoff_mult
  @post_logs_retry_backoff = options.post_logs_retry_backoff
  @post_logs_retry_limit = options.post_logs_retry_limit
  @session_id = SecureRandom.uuid
  @connection_pool = ConnectionPool.new(size: 3) do
    meta = Statsig.get_statsig_metadata
    client = HTTP.use(:auto_inflate).headers(
      {
        'STATSIG-API-KEY' => @server_secret,
        'STATSIG-SERVER-SESSION-ID' => @session_id,
        'Content-Type' => 'application/json; charset=UTF-8',
        'STATSIG-SDK-TYPE' => meta['sdkType'],
        'STATSIG-SDK-VERSION' => meta['sdkVersion'],
        'STATSIG-SDK-LANGUAGE-VERSION' => meta['languageVersion'],
        'Accept-Encoding' => 'gzip'
      }
    ).accept(:json)

    if @timeout
      client = client.timeout(@timeout)
    end

    client
  end
end

Instance Method Details

#download_config_specs(since_time, context) ⇒ Object 



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# File 'lib/network.rb', line 53

def download_config_specs(since_time, context)
  url = @options.download_config_specs_url
  dcs_url = "#{url}#{@server_secret}.json"
  if since_time.positive?
    dcs_url += "?sinceTime=#{since_time}"
  end
  if context == 'initialize'
    return get(dcs_url, @options.initialize_retry_limit)
  end
  get(dcs_url)
end

#get(url, retries = 0, backoff = 1) ⇒ Object 



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# File 'lib/network.rb', line 95

def get(url, retries = 0, backoff = 1)
  request(:GET, url, nil, retries, backoff)
end

#get_id_lists(context) ⇒ Object 



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# File 'lib/network.rb', line 87

def get_id_lists(context)
  url = @options.get_id_lists_url
  if context == 'initialize'
    return post(url, JSON.generate({ 'statsigMetadata' => Statsig.get_statsig_metadata }), @options.initialize_retry_limit)
  end
  post(url, JSON.generate({ 'statsigMetadata' => Statsig.get_statsig_metadata }))
end

#post(url, body, retries = 0, backoff = 1, zipped = false, event_count = 0) ⇒ Object 



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# File 'lib/network.rb', line 99

def post(url, body, retries = 0, backoff = 1, zipped = false, event_count = 0)
  request(:POST, url, body, retries, backoff, zipped, event_count)
end

#post_logs(events, error_boundary) ⇒ Object 



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# File 'lib/network.rb', line 65

def post_logs(events, error_boundary)
  url = @options.log_event_url
  event_count = events.length
  json_body = JSON.generate({ events: events, statsigMetadata: Statsig.get_statsig_metadata })
  gzip = Zlib::GzipWriter.new(StringIO.new)
  gzip << json_body

  response, e = post(url, gzip.close.string, @post_logs_retry_limit, 1, true, event_count)

  # Consume response body to ensure connection can be closed.
  response&.flush

  unless e == nil
    message = "Failed to log #{event_count} events after #{@post_logs_retry_limit} retries"
    puts "[Statsig]: #{message}"
    error_boundary.log_exception(e, tag: 'statsig::log_event_failed', extra: { eventCount: event_count, error: message }, force: true)
    return
  end
rescue StandardError

end

#request(method, url, body, retries = 0, backoff = 1, zipped = false, event_count = 0) ⇒ Object 



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# File 'lib/network.rb', line 103

def request(method, url, body, retries = 0, backoff = 1, zipped = false, event_count = 0)
  if @local_mode
    return nil, nil
  end
  backoff_adjusted = backoff > 10 ? backoff += Random.rand(10) : backoff # to deter overlap
  if @post_logs_retry_backoff
    if @post_logs_retry_backoff.is_a? Integer
      backoff_adjusted = @post_logs_retry_backoff
    else
      backoff_adjusted = @post_logs_retry_backoff.call(retries)
    end
  end

  begin
    res = @connection_pool.with do |conn|
      request = conn.headers(
        'STATSIG-CLIENT-TIME' => (Time.now.to_f * 1000).to_i.to_s,
        'CONTENT-ENCODING' => zipped ? 'gzip' : nil,
        'STATSIG-EVENT-COUNT' => event_count == 0 ? nil : event_count.to_s
      )

      case method
      when :GET
        request.get(url)
      when :POST
        request.post(url, body: body)
      end
    end
  rescue StandardError => e
    ## network error retry
    return nil, e unless retries.positive?

    sleep backoff_adjusted
    return request(method, url, body, retries - 1, backoff * @backoff_multiplier, zipped, event_count)
  end
  return res, nil if res.status.success?

  unless retries.positive? && RETRY_CODES.include?(res.code)
    return res, NetworkError.new("Got an exception when making request to #{url}: #{res.to_s}",
                                 res.status.to_i)
  end

  ## status code retry
  sleep backoff_adjusted
  request(method, url, body, retries - 1, backoff * @backoff_multiplier, zipped, event_count)
end