#!/usr/bin/env python
#coding: utf8

import cgi
print "Content-Type: text/html"     # HTML is following
print                               # blank line, end of headers
form = cgi.FieldStorage()
img = form["img"]
imgsz = form["imgsz"]
print imgsz
if img.file:
	# It's an uploaded file; count lines
	rcv = 0
	while 1:
		chunk = img.file.read(1024)
		if not chunk:
			break
		rcv += len(chunk)

assert rcv == imgsz