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# SHA1 checksum generator
require 'digest/sha1'
use Rack::ContentLength
cap = 16384
app = lambda do |env|
/\A100-continue\z/i =~ env['HTTP_EXPECT'] and
return [ 100, {}, [] ]
digest = Digest::SHA1.new
input = env['rack.input']
input.size if env["PATH_INFO"] == "/size_first"
input.rewind if env["PATH_INFO"] == "/rewind_first"
if buf = input.read(rand(cap))
begin
raise "#{buf.size} > #{cap}" if buf.size > cap
digest.update(buf)
end while input.read(rand(cap), buf)
end
[ 200, {'Content-Type' => 'text/plain'}, [ digest.hexdigest << "\n" ] ]
end
run app
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