mirror of
https://github.com/YunoHost-Apps/seafile_ynh.git
synced 2024-09-03 20:26:01 +02:00
83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
import random
|
|
from captcha.conf import settings
|
|
from django.core.urlresolvers import reverse
|
|
|
|
|
|
def math_challenge():
|
|
operators = ('+', '*', '-',)
|
|
operands = (random.randint(1, 10), random.randint(1, 10))
|
|
operator = random.choice(operators)
|
|
if operands[0] < operands[1] and '-' == operator:
|
|
operands = (operands[1], operands[0])
|
|
challenge = '%d%s%d' % (operands[0], operator, operands[1])
|
|
return '%s=' % (challenge), eval(challenge)
|
|
|
|
|
|
def random_char_challenge():
|
|
chars, ret = u'abcdefghijklmnopqrstuvwxyz', u''
|
|
for i in range(settings.CAPTCHA_LENGTH):
|
|
ret += random.choice(chars)
|
|
return ret.upper(), ret
|
|
|
|
|
|
def unicode_challenge():
|
|
chars, ret = u'äàáëéèïíîöóòüúù', u''
|
|
for i in range(settings.CAPTCHA_LENGTH):
|
|
ret += random.choice(chars)
|
|
return ret.upper(), ret
|
|
|
|
|
|
def word_challenge():
|
|
fd = open(settings.CAPTCHA_WORDS_DICTIONARY, 'rb')
|
|
l = fd.readlines()
|
|
fd.close()
|
|
while True:
|
|
word = random.choice(l).strip()
|
|
if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH:
|
|
break
|
|
return word.upper(), word.lower()
|
|
|
|
|
|
def huge_words_and_punctuation_challenge():
|
|
"Yay, undocumneted. Mostly used to test Issue 39 - http://code.google.com/p/django-simple-captcha/issues/detail?id=39"
|
|
fd = open(settings.CAPTCHA_WORDS_DICTIONARY, 'rb')
|
|
l = fd.readlines()
|
|
fd.close()
|
|
word = ''
|
|
while True:
|
|
word1 = random.choice(l).strip()
|
|
word2 = random.choice(l).strip()
|
|
punct = random.choice(settings.CAPTCHA_PUNCTUATION)
|
|
word = '%s%s%s' % (word1, punct, word2)
|
|
if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH:
|
|
break
|
|
return word.upper(), word.lower()
|
|
|
|
|
|
def noise_arcs(draw, image):
|
|
size = image.size
|
|
draw.arc([-20, -20, size[0], 20], 0, 295, fill=settings.CAPTCHA_FOREGROUND_COLOR)
|
|
draw.line([-20, 20, size[0] + 20, size[1] - 20], fill=settings.CAPTCHA_FOREGROUND_COLOR)
|
|
draw.line([-20, 0, size[0] + 20, size[1]], fill=settings.CAPTCHA_FOREGROUND_COLOR)
|
|
return draw
|
|
|
|
|
|
def noise_dots(draw, image):
|
|
size = image.size
|
|
for p in range(int(size[0] * size[1] * 0.1)):
|
|
draw.point((random.randint(0, size[0]), random.randint(0, size[1])), fill=settings.CAPTCHA_FOREGROUND_COLOR)
|
|
return draw
|
|
|
|
|
|
def post_smooth(image):
|
|
try:
|
|
import ImageFilter
|
|
except ImportError:
|
|
from PIL import ImageFilter
|
|
return image.filter(ImageFilter.SMOOTH)
|
|
|
|
|
|
def captcha_image_url(key):
|
|
""" Return url to image. Need for ajax refresh and, etc"""
|
|
return reverse('captcha-image', args=[key])
|