#!/usr/bin/python

from os import environ as env
import urllib.request
import sys

def error():
  print("Content-type: text/html")
  print()
  print("HELLO!")

def proxy(url,ext):
  req = urllib.request.urlopen(url)
  print("Content-type: image/" + ext)
  print()
  sys.stdout.flush()
  sys.stdout.buffer.write( req.read() )

path = env['QUERY_STRING']
ext = path[-3:].lower()

if path[0:4] == "http" and ext in ("gif","jpg","png","peg"):
  proxy(path,ext)
else:
  error()