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class String
def underscore
self.gsub(/::/, '/').
gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
gsub(/([a-z\d])([A-Z])/,'\1_\2').
tr("-", "_").
downcase
end
end
module URI
def self.task? uri
uri =~ /task/ and URI.valid? uri
end
def self.dataset? uri, subjectid=nil
uri =~ /dataset/ and URI.accessible? uri, subjectid=nil
end
def self.model? uri, subjectid=nil
uri =~ /model/ and URI.accessible? uri, subjectid=nil
end
def self.accessible? uri, subjectid=nil
Net::HTTP.get_response(URI.parse(uri))
true
rescue
false
end
def self.valid? uri
u = URI::parse(uri)
u.scheme!=nil and u.host!=nil
rescue URI::InvalidURIError
false
end
end
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