78 lines
2.1 KiB
Ruby
78 lines
2.1 KiB
Ruby
module MusicBrainz
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@@last_query_time = 0
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@@query_interval = 1.5 # Min: 1.0 Safe: 1.5
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@@cache_path = nil
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WEB_SERVICE_URL = 'http://musicbrainz.org/ws/2/'
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USER_AGENT = "gem musicbrainz (https://github.com/magnolia-fan/musicbrainz) @ " + Socket.gethostname
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def self.query_interval= sec
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@@query_interval = sec.to_f
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end
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def self.cache_path= path
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@@cache_path = path
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end
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def self.load resourse, params = {}
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url = WEB_SERVICE_URL + resourse.to_s.gsub('_', '-') + '/' + (params[:id].to_s || '')
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params.delete(:id) unless params[:id].nil?
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url << '?' + params.map{ |k, v|
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k.to_s.gsub('_', '-') + '=' + (v.is_a?(Array) ? v.map{ |_| _.to_s.gsub('_', '-') }.join('+') : v.to_s)
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}.join('&') unless params.empty?
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self.cache_contents(url) do
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self.get_contents url
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end
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end
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def self.clear_cache
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FileUtils.rm_r(@@cache_path) if @@cache_path && File.exist?(@@cache_path)
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end
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private
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def self.cache_contents url
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response = nil
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url_parts = url.split('/')
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file_name = url_parts.pop
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directory = url_parts.pop
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file_path = @@cache_path ? "#{@@cache_path}/#{directory}/#{file_name}" : nil
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if file_path && File.exist?(file_path)
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response = File.open(file_path).gets
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else
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response = yield
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unless response.nil? || file_path.nil?
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FileUtils.mkdir_p file_path.split('/')[0..-2].join('/')
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file = File.new(file_path, 'w')
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file.puts(response.gets.force_encoding('UTF-8'))
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file.chmod(0755)
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file.close
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response.rewind
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end
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end
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response
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end
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def self.get_contents url
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response = nil
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5.times do
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time_passed = Time.now.to_f - @@last_query_time
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sleep @@query_interval - time_passed if time_passed < @@query_interval
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begin
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response = open(url, "User-Agent" => USER_AGENT)
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@@last_query_time = Time.now.to_f
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rescue => e
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response = nil if e.io.status[0].to_i == 404
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end
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break unless response.nil?
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end
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response
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end
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end |