Ruby: Check if an URL is available

This little Ruby function will check if an URL is available (response code 200). It will return true if the return code is 200 (success), false if any other code is returned, such as 404 (not found.)

	def UrlAvailable?(urlStr)
	url = URI.parse(urlStr)
	Net::HTTP.start(urlStr.host, urlStr.port) do |http|
	return http.head(urlStr.request_uri).code == "200"
	end
	end

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