Stream compress, encrypt, decrypt, uncompress

example.sh

#!/bin/bash

# http://unix.stackexchange.com/questions/79525/openssl-buffering-problem
# http://stackoverflow.com/questions/570984/how-can-i-gzip-standard-in-to-a-file-and-also-print-standard-in-to-standard-out
time (
  ruby -e "STDOUT.sync=true; 100000.times {|i| puts(i.to_s + ' knowledge is power') }" |
  gzip --stdout |
  openssl enc -aes-128-cfb -pass pass:test -bufsize 256 |
  openssl enc -base64 -bufsize 256 |
  openssl enc -base64 -d -bufsize 256 |
  openssl enc -d -aes-128-cfb -pass pass:test -bufsize 256 |
  gunzip --stdout > /dev/null
)

time_buffer.sh

#!/bin/bash
time (
  ruby -e "
    STDOUT.sync=true
    STDERR.sync=true
      puts(i.to_s + ' knowledge is power')
      #sleep 5
      #sleep 1
      #sleep 0.1
    end
  " |
  ruby -e '
    STDOUT.sync=true
    STDERR.sync=true
    buffer = ""
    max_time = 3.0
    last_time = Time.now

    loop do
STDERR.puts "loop"
      time_elapsed = Time.now - last_time
      time_remaining = max_time - time_elapsed

      if time_remaining < 0
        if buffer.length > 0
STDERR.puts "pad"
          buffer = buffer.ljust(256, ".")
        else
STDERR.puts "reset"
          last_time = Time.now
        end
      else
        if IO.select([STDIN], nil, nil, time_remaining)
          buffer += STDIN.read_nonblock(256 - buffer.length)
        end
      end

      if buffer.length == 256
        print buffer
        buffer = ""
        last_time = Time.now
      end
    end
  ' |
  openssl enc -aes-128-cfb -pass pass:test -bufsize 256 |
  openssl enc -d -aes-128-cfb -pass pass:test -bufsize 1
)