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Added cache_contents block around get_contents to cache requests when a cache path is set.

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This commit is contained in:
mgawlista 2012-04-08 18:48:38 +02:00
parent 7600b3855b
commit abc8218a06
1 changed files with 43 additions and 5 deletions
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42
lib/models/music_brainz.rb
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@ -1,6 +1,7 @@
module MusicBrainz
@@last_query_time = 0
@@query_interval = 1.5 # Min: 1.0 Safe: 1.5
@@cache_path = nil
WEB_SERVICE_URL = 'http://musicbrainz.org/ws/2/'
USER_AGENT = "gem musicbrainz (https://github.com/magnolia-fan/musicbrainz) @ " + Socket.gethostname
@ -9,18 +10,55 @@ module MusicBrainz
@@query_interval = sec.to_f
end
def self.cache_path= path
@@cache_path = path
end
def self.load resourse, params = {}
url = WEB_SERVICE_URL + resourse.to_s.gsub('_', '-') + '/' + (params[:id].to_s || '')
params.delete(:id) unless params[:id].nil?
url << '?' + params.map{ |k, v|
k.to_s.gsub('_', '-') + '=' + (v.is_a?(Array) ? v.map{ |_| _.to_s.gsub('_', '-') }.join('+') : v.to_s)
}.join('&') unless params.empty?
self.get_contents url
self.cache_contents(url) do
self.get_contents url
end
end
def self.clear_cache
FileUtils.rm_r(@@cache_path) if @@cache_path && File.exist?(@@cache_path)
end
private
def self.cache_contents url
response = nil
url_parts = url.split('/')
file_name = url_parts.pop
directory = url_parts.pop
file_path = @@cache_path ? "#{@@cache_path}/#{directory}/#{file_name}" : nil
if file_path && File.exist?(file_path)
response = File.open(file_path).gets
else
response = yield
unless response.nil? || file_path.nil?
FileUtils.mkdir_p file_path.split('/')[0..-2].join('/')
file = File.new(file_path, 'w')
file.puts(response.gets.force_encoding('UTF-8'))
file.chmod(0755)
file.close
response.rewind
end
end
response
end
def self.get_contents url
self.get_contents_intern
response = nil
5.times do
@ -31,7 +69,7 @@ private
response = open(url, "User-Agent" => USER_AGENT)
@@last_query_time = Time.now.to_f
rescue => e
return nil if e.io.status[0].to_i == 404
response = nil if e.io.status[0].to_i == 404
end
break unless response.nil?