52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
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# -*- coding: utf-8 -*-
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import random
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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 u'%s=' %(challenge), unicode(eval(challenge))
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def random_char_challenge():
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chars,ret = u'abcdefghijklmnopqrstuvwxyz', u''
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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 = u'äàáëéèïíîöóòüúù', u''
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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 = file(settings.CAPTCHA_WORDS_DICTIONARY,'rb')
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l = fd.readlines()
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fd.close()
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while True:
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word = random.choice(l).strip()
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if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH:
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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([-20,20, size[0]+20,size[1]-20], fill=settings.CAPTCHA_FOREGROUND_COLOR)
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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((random.randint(0, size[0]),random.randint(0, size[1])), fill=settings.CAPTCHA_FOREGROUND_COLOR )
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return draw
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def post_smooth(image):
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import ImageFilter
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return image.filter(ImageFilter.SMOOTH)
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