45 lines
857 B
Ruby
45 lines
857 B
Ruby
require "sinatra"
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require "mini_magick"
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MiniMagick.logger.level = Logger::DEBUG
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ROOT = ENV["ROOT"]
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KEY = ENV["KEY"]
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FileUtils.mkdir_p "tmp"
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get "/*" do |path|
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filename = File.basename(path)
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geometry = params["geo"] unless params["geo"] == ""
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@decrypted = Tempfile.new(filename, "tmp")
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@dithered = Tempfile.new([filename, ".png"], "tmp")
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%x(
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openssl \
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aes-256-cbc \
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-d \
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-in #{ROOT}/#{path}.enc \
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-out #{@decrypted.path} \
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-pass file:#{KEY} \
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-iter 1000000
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)
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convert = MiniMagick::Tool::Convert.new
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convert << @decrypted.path
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if geometry
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convert.resize "#{geometry}^"
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convert.gravity "center"
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convert.extent geometry
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end
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convert.ordered_dither "o8x8"
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convert.monochrome
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convert << @dithered.path
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convert.call
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content_type "image/png"
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File.open(@dithered.path)
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end
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