discourse/lib/final_destination/fast_image.rb

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# frozen_string_literal: true
class FinalDestination::FastImage < ::FastImage
def initialize(url, options = {})
uri = URI(normalized_url(url))
options.merge!(http_header: { "Host" => uri.hostname })
uri.hostname = resolved_ip(uri)
super(uri.to_s, options)
rescue FinalDestination::SSRFDetector::DisallowedIpError, SocketError, Timeout::Error
super("")
end
private
def resolved_ip(uri)
FinalDestination::SSRFDetector.lookup_and_filter_ips(uri.hostname).first
end
def normalized_url(uri)
UrlHelper.normalized_encode(uri)
end
end