Class: LaunchDarkly::Impl::DataSystem::HTTPPollingRequester Private

Inherits:
Object
  • Object
show all
Includes:
DataSystem::Requester
Defined in:
lib/ldclient-rb/impl/data_system/polling.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

HTTPPollingRequester is a Requester that uses HTTP to make requests to the FDv2 polling endpoint.

Since:

  • 5.5.0

Instance Method Summary collapse

Constructor Details

#initialize(sdk_key, http_config, config) ⇒ HTTPPollingRequester

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of HTTPPollingRequester.

Parameters:

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/data_system/polling.rb', line 297

def initialize(sdk_key, http_config, config)
  @etag = nil
  @config = config
  @sdk_key = sdk_key
  @poll_uri = http_config.base_uri + FDV2_POLLING_ENDPOINT
  @http_client = Impl::Util.new_http_client(http_config)
    .use(:auto_inflate)
    .headers("Accept-Encoding" => "gzip")
end

Instance Method Details

#fetch(selector) ⇒ Result

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Parameters:

Returns:

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/data_system/polling.rb', line 311

def fetch(selector)
  query_params = []
  query_params << ["filter", @config.payload_filter_key] unless @config.payload_filter_key.nil?

  if selector && selector.defined?
    query_params << ["selector", selector.state]
  end

  uri = @poll_uri
  if query_params.any?
    filter_query = URI.encode_www_form(query_params)
    uri = "#{uri}?#{filter_query}"
  end

  headers = {}
  Impl::Util.default_http_headers(@sdk_key, @config).each { |k, v| headers[k] = v }
  headers["If-None-Match"] = @etag unless @etag.nil?

  begin
    response = @http_client.request("GET", uri, headers: headers)
    status = response.status.code
    response_headers = response.headers.to_h.transform_keys(&:downcase)

    if status >= 400
      return LaunchDarkly::Result.fail(
        "HTTP error #{status}",
        LaunchDarkly::Impl::DataSource::UnexpectedResponseError.new(status),
        response_headers
      )
    end

    if status == 304
      return LaunchDarkly::Result.success(LaunchDarkly::Interfaces::DataSystem::ChangeSetBuilder.no_changes, response_headers)
    end

    body = response.to_s
    data = JSON.parse(body, symbolize_names: true)
    etag = response_headers["etag"]
    @etag = etag unless etag.nil?

    @config.logger.debug { "[LDClient] #{uri} response status:[#{status}] ETag:[#{etag}]" }

    changeset_result = LaunchDarkly::Impl::DataSystem.polling_payload_to_changeset(data)
    if changeset_result.success?
      LaunchDarkly::Result.success(changeset_result.value, response_headers)
    else
      LaunchDarkly::Result.fail(changeset_result.error, changeset_result.exception, response_headers)
    end
  rescue JSON::ParserError => e
    LaunchDarkly::Result.fail("Failed to parse JSON: #{e.message}", e, response_headers)
  rescue => e
    LaunchDarkly::Result.fail("Network error: #{e.message}", e)
  end
end

#stop ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Closes the HTTP client and releases any persistent connections.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/data_system/polling.rb', line 369

def stop
  begin
    @http_client.close if @http_client
  rescue
  end
end