def claim_wpm_challenge(user, token, typed, claimed_wpm):
challenge_user, reference, start_time = decode_challenge(token=token)
end_time = time.time()
if user != challenge_user:
return
accuracy = cats.accuracy(" ".join(typed), " ".join(reference))
wpm = cats.wpm(" ".join(reference), end_time - start_time)
if wpm < claimed_wpm * CAPTCHA_SLOWDOWN_FACTOR:
# too slow!
return {
"success": False,
"message": "Your captcha was typed too slowly!"
}
if accuracy < CAPTCHA_ACCURACY_THRESHOLD:
# too inaccurate!
return {"success": False, "message": "You made too many mistakes!"}
return {
"success": True,
"token": create_wpm_authorization(user, claimed_wpm)
}
def analyze(prompted_text, typed_text, start_time, end_time):
"""Return [wpm, accuracy]."""
return {
"wpm": cats.wpm(typed_text, end_time - start_time),
"accuracy": cats.accuracy(typed_text, prompted_text)
}