Embed HTML images

embed_images_in_html.py

#!python3
import re
from argparse import ArgumentParser
from base64 import b64encode
from os.path import basename, abspath, dirname, join

parser = ArgumentParser()
parser.add_argument("filename")
args = parser.parse_args()

folder = dirname(abspath(args.filename))
with open(args.filename, "r") as fp:
    data = fp.read()
for im, alt in re.findall('<img src="(.{,100})" alt="()">', data):
    with open(join(folder, im), "rb") as fp:
        imb64 = b64encode(fp.read())
    ext = ".".join(basename(im).split(".")[1:])
    data = data.replace(im, f'data:image/{ext};base64,{imb64.decode("utf-8")}')

with open(args.filename, "w") as fp:
    fp.write(data)