31 lines
910 B
Ruby
31 lines
910 B
Ruby
# implicitly requires OpenSSL
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module Diaspora
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module Camo
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def self.from_markdown(markdown_text)
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markdown_text.gsub(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/m) do |link|
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link.gsub($4, self.image_url($4))
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end
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end
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def self.image_url(url)
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return unless url
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return url unless self.url_eligible?(url)
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digest = OpenSSL::HMAC.hexdigest(
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OpenSSL::Digest.new('sha1'),
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AppConfig.privacy.camo.key,
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url
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)
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encoded_url = url.to_enum(:each_byte).map {|byte| '%02x' % byte}.join
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"#{AppConfig.privacy.camo.root}#{digest}/#{encoded_url}"
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end
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def self.url_eligible?(url)
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return false unless url.start_with?('http', '//')
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return false if url.start_with?(AppConfig.environment.url.to_s,
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AppConfig.privacy.camo.root.to_s)
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true
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end
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end
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end
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