#!/usr/bin/python3
# requests_cartoon.py shows latest cartoon from xkcd
import os, re, requests, subprocess

# dowload website text from server https://xkcd.com
try:
    rsp = requests.get("https://xkcd.com")
    txt = rsp.text
except requests.exceptions.RequestException as e:
    raise SystemExit(e)

# search for image file name and save it in img
re1 = r'<img src="//imgs.xkcd\.com/comics/'
re2 = r'(\w+\.png)'
reo = re.compile(re1+re2)
mao = reo.search(txt)
if mao:
    img = mao.group(1)
else: print("ERROR: image file not found!")

# dowload image file from server https://xkcd.com
bas = "https://imgs.xkcd.com/comics/"
try:
    rsp = requests.get(bas+img)
except requests.exceptions.RequestException as e:
    raise SystemExit(e)

# save image in temporary file, show it, delete it
with open("xkcd.tmp", "wb") as f:
    f.write(rsp.content)
subprocess.run(["fim", "xkcd.tmp"], check=True)
os.remove("xkcd.tmp")