Added captcha to thirdpart

thirdpart/captcha/helpers.py

@@ -0,0 +1,83 @@
+# -*- 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])