class GenericCachedDownloader
Public Class Methods
Source
# File lib/cartocss_helper/util/generic_cached_downloader.rb, line 6 def initialize(timeout: 20, error_message: nil, stop_on_timeout: true, wrapper: RestClientWrapper.new) @request_timeout = timeout @error_message = error_message @stop_on_timeout = stop_on_timeout @wrapper = wrapper end
Public Instance Methods
Source
# File lib/cartocss_helper/util/generic_cached_downloader.rb, line 41 def download(url, description) downloader = GenericDownloader.new(timeout: @request_timeout, error_message: @error_message, stop_on_timeout: @stop_on_timeout, wrapper: @wrapper) return downloader.get_specified_resource(url, description: description) end
Source
# File lib/cartocss_helper/util/generic_cached_downloader.rb, line 33 def get_cache_timestamp(cache_filename) return nil unless File.exist?(cache_filename) f = File.new(cache_filename) timestamp = f.mtime.to_i f.close return timestamp end
Source
# File lib/cartocss_helper/util/generic_cached_downloader.rb, line 13 def get_specified_resource(url, cache_filename, description: nil, invalidate_cache: false) cache = read_from_cache(cache_filename) cache = nil if invalidate_cache return cache if cache != nil response = download(url, description) write_cache(response, cache_filename) return response end
Source
# File lib/cartocss_helper/util/generic_cached_downloader.rb, line 23 def read_from_cache(cache_filename) if File.exist?(cache_filename) file = File.new(cache_filename) cached = file.read file.close return cached end return nil end
Source
# File lib/cartocss_helper/util/generic_cached_downloader.rb, line 46 def write_cache(response, cache_filename) file = File.new(cache_filename, 'w') file.write response file.close end