cloudflare browser check

cloudflare.py

import re
import requests
from types import *
from urlparse import urlparse
solverregex = re.compile('.*?setTimeout\(function\(\){.*?var t,r,a,f, ([^=]+)={"([^"]+)":([^}]+)};.+challenge-form\'\);.*?\n.*?;(.*?);a.value =.*?f\.submit\(\);.*?}, 5850\);.*',  re.DOTALL)
vcregex = re.compile('<input type="hidden" name="jschl_vc" value="([^"]+)"/>')

def getNested(s, delim=("(", ")")):
	level = 0
	pos = 0
	for c in s:
		pos+=1
		if c == delim[0]:
			level +=1
		elif c == delim[1]:
			level -=1
		if level == -1: 
			return pos-1
	print "Couldn't find matching - level ", level
	return s
indent = -1
def solveEquation(q):
	global indent
	indent +=1
	print '\t'*indent, "Parsing:", q
	pos = 0
	res = 0
	stringify = False
	if q[0] == "!":
		stringify = True
	while pos < len(q):
		if q[pos] == "(":
			nested = getNested(q[pos+1:len(q)])
			nres = solveEquation(q[pos+1:pos+1+nested])
			if type(nres) is StringType and type(res) is not StringType :
				res = str(res)+nres
			elif type(res) == StringType and type(nres) is IntType:
				res = res + str(nres)
			else:
				res +=nres
			pos+=nested+1
		elif q[pos] == ")":
			pass
			pos+=1
		elif q[pos:pos+4] == "!+[]":
			res+=1
			pos+=4
		elif q[pos:pos+5] == "+!![]":
			res+=1
			pos+=5
		elif q[pos:pos+3] == "+[]":
			pos+=3
		elif q[pos:pos+2] == "+(":
			pos+=1
		# we dont care about whitespaces
		elif q[pos] == " ": 
			pos+=1
		elif q[pos] == "\t":
			pos+=1
		else: 
			print '\t'*indent, "Unknown", q[pos:pos+6]
			break
	print '\t'*indent, "Res is ", res
	indent -=1
	if stringify:
		return str(res)
	return res
def solve(request, session):
	res = solverregex.findall(request.test)
	if len(res) == 0:
		print "Couldn't find answer script - No cloudflare check?"
		return False
	res=res[0]
	vc = vcregex.findall(request.test)
	if len(vc)==0:
		print "Couldn't find vc input - No cloudflare check?"
		return False
	vc = vc[0]
	print "VC is ", vc
	varname = (res[0], res[1])
	solved = int(solveEquation(res[2].rstrip()))
	print "Initial value: ", res[2], "Solved:", solved
	for extra in res[3].split(";"):
		extra = extra.rstrip()
		if extra[:len('.'.join(varname))] != '.'.join(varname):
			print "Extra does not start with varname (", extra, ")"
		else:
			extra = extra[len('.'.join(varname)):]
		if extra[:2] == "+=":
			solved += int(solveEquation(extra[2:]))
		elif extra[:2] == "-=":
			solved -= int(solveEquation(extra[2:]))
		elif extra[:2] == "*=":
			solved *= int(solveEquation(extra[2:]))
		elif extra[:2] == "/=":
			solved /= int(solveEquation(extra[2:]))
		else:
			print "Unknown modifier", extra
	print "Solved value: ", solved
	up = urlparse(request.url)
	solved += len(up.netloc)
	print "With domain length", solved
	final = session.get(up.scheme+"//"+up.netloc+"/cdn-cgi/l/chk_jschl?jschl_vc={0}&jschl_answer={1}".format(vc, solved))
	if final.status_code == 200:
		return final
	else:
		print "Status code not 200, but", final.status_code
		print "Might not have worked, returning request anyways"
		return final