Base64 encoding sh for PNG,GIF image.

ImgBaseRokuyon.sh

#!/bin/sh

HEADER_STR=""
if [ $# -eq 0 ] ; then
  echo "usage: ${0} [IMAGE_FILE_PATH]..."
  exit 1
fi

for I in $@ ; do
  HEADER_STR=`/usr/bin/file -bI ${I} | /usr/bin/sed "s# .*##g"`
  if [ "${HEADER_STR}" != "image/png;" -a "${HEADER_STR}" != "image/gif;" ] ; then
    echo "${I} : NOT PNG or GIF file"
    continue
  fi
  HEADER_STR="data:"${HEADER_STR}"base64,"

  echo "${HEADER_STR}" > ${I}_base64_tmp
  /bin/cat ${I} | /usr/bin/openssl enc -base64 >> ${I}_base64_tmp
  /bin/cat ${I}_base64_tmp | /usr/bin/tr -d '\r' | /usr/bin/tr -d '\n' > ${I}_base64
  /bin/rm -f ${I}_base64_tmp
done