[macosx] a shell script to create a data-uri from an image file.

duri.sh

#!/bin/bash

function get-property {
  sips -g "$1" "$2" | tail -1 | awk '{ print $2 }'
}

function col-80 {
  ruby -e "
    b = []
    while a = gets
      b << a.strip
    end
    b = b.join
    while b
      puts b[0, 80]
      b = b[80, b.size]
    end
  "
}

function encode-base64 {
  openssl base64 < "$1" | col-80
}

function duri {
  f="$1"

  N=$(basename                 "$f")
  W=$(get-property pixelWidth  "$f")
  H=$(get-property pixelHeight "$f")
  F=$(get-property format      "$f")
  D=$(encode-base64            "$f")

  echo "<image
 width='$W' height='$H'
 title='$N' alt='$N'
 src='data:image/$F;base64,
$D'>"
}

function msgbox {
  M="$*"
  osascript -e "
    try
      tell application \"SystemUIServer\"
        set answer to display dialog \"$M\" with title \"DataURI\" buttons { \"OK\" } default button 1
      end
    end
    activate app (path to frontmost application as text)
  "
}

function main {
  N=$(basename "$1")
  D=$(duri "$1")
  L=$(echo "$D" | wc -l | awk '{ print $1 }')
  echo "$D" | pbcopy
  if [ $# -gt 1 ]; then
    msgbox "$N
text of $L lines copied to clipboard

( You must not drop multiple files at once. )"
  else
    msgbox "$N
text of $L lines copied to clipboard"
  fi
}

main "$@"