106 lines
3.0 KiB
Python
106 lines
3.0 KiB
Python
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import random
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from django.urls import reverse
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from captcha.conf import settings
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def math_challenge():
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operators = ("+", "*", "-")
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operands = (random.randint(1, 10), random.randint(1, 10))
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operator = random.choice(operators)
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if operands[0] < operands[1] and "-" == operator:
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operands = (operands[1], operands[0])
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challenge = "%d%s%d" % (operands[0], operator, operands[1])
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return (
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"{}=".format(challenge.replace("*", settings.CAPTCHA_MATH_CHALLENGE_OPERATOR)),
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str(eval(challenge)),
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)
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def random_char_challenge():
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chars, ret = "abcdefghijklmnopqrstuvwxyz", ""
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for i in range(settings.CAPTCHA_LENGTH):
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ret += random.choice(chars)
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return ret.upper(), ret
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def unicode_challenge():
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chars, ret = "äàáëéèïíîöóòüúù", ""
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for i in range(settings.CAPTCHA_LENGTH):
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ret += random.choice(chars)
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return ret.upper(), ret
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def word_challenge():
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fd = open(settings.CAPTCHA_WORDS_DICTIONARY, "r")
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lines = fd.readlines()
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fd.close()
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while True:
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word = random.choice(lines).strip()
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if (
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len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH
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and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH
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):
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break
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return word.upper(), word.lower()
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def huge_words_and_punctuation_challenge():
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"Yay, undocumneted. Mostly used to test Issue 39 - http://code.google.com/p/django-simple-captcha/issues/detail?id=39"
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fd = open(settings.CAPTCHA_WORDS_DICTIONARY, "rb")
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lines = fd.readlines()
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fd.close()
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word = ""
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while True:
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word1 = random.choice(lines).strip()
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word2 = random.choice(lines).strip()
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punct = random.choice(settings.CAPTCHA_PUNCTUATION)
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word = "%s%s%s" % (word1, punct, word2)
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if (
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len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH
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and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH
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):
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break
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return word.upper(), word.lower()
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def noise_arcs(draw, image):
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size = image.size
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draw.arc([-20, -20, size[0], 20], 0, 295, fill=settings.CAPTCHA_FOREGROUND_COLOR)
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draw.line(
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[-20, 20, size[0] + 20, size[1] - 20], fill=settings.CAPTCHA_FOREGROUND_COLOR
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)
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draw.line([-20, 0, size[0] + 20, size[1]], fill=settings.CAPTCHA_FOREGROUND_COLOR)
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return draw
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def noise_dots(draw, image):
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size = image.size
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for p in range(int(size[0] * size[1] * 0.1)):
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draw.point(
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(random.randint(0, size[0]), random.randint(0, size[1])),
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fill=settings.CAPTCHA_FOREGROUND_COLOR,
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)
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return draw
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def noise_null(draw, image):
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return draw
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def post_smooth(image):
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from PIL import ImageFilter
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return image.filter(ImageFilter.SMOOTH)
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def captcha_image_url(key):
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"""Return url to image. Need for ajax refresh and, etc"""
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return reverse("captcha-image", args=[key])
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def captcha_audio_url(key):
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"""Return url to image. Need for ajax refresh and, etc"""
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return reverse("captcha-audio", args=[key])
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