73 lines
2.0 KiB
Python
73 lines
2.0 KiB
Python
import os.path
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import random
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from rest_captcha.settings import api_settings as settings
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from django.conf import settings as django_setting
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from PIL import ImageFont, ImageDraw, Image
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from .serializers import noise_default
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from django.core.cache import caches
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from rest_captcha import captcha
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from io import BytesIO as StringIO
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cache = caches[settings.CAPTCHA_CACHE]
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path = os.path.dirname(__file__) + '/' # noqa
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def random_char_challenge(length):
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chars = '123456789'
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ret = ''
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for i in range(length):
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ret += random.choice(chars)
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return ret.upper()
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def generate_image(word):
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font = ImageFont.load_default()
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size = settings.CAPTCHA_IMAGE_SIZE
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xpos = 2
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from_top = 4
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image = captcha.makeimg(size)
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for char in word:
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fgimage = Image.new('RGB', size, settings.CAPTCHA_FOREGROUND_COLOR)
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charimage = Image.new('L', captcha.getsize(font, ' %s ' % char), '#000000')
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chardraw = ImageDraw.Draw(charimage)
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chardraw.text((0, 0), char, font=font, fill='#ffffff')
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charimage = charimage.crop(charimage.getbbox())
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maskimage = Image.new('L', size)
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xpos2 = xpos + charimage.size[0]
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from_top2 = from_top + charimage.size[1]
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maskimage.paste(charimage, (xpos, from_top, xpos2, from_top2))
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size = maskimage.size
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image = Image.composite(fgimage, image, maskimage)
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xpos = xpos + 2 + charimage.size[0]
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if settings.CAPTCHA_IMAGE_SIZE:
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# centering captcha on the image
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tmpimg = captcha.makeimg(size)
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xpos2 = int((size[0] - xpos) / 2)
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from_top2 = int((size[1] - charimage.size[1]) / 2 - from_top)
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tmpimg.paste(image, (xpos2, from_top2))
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image = tmpimg.crop((0, 0, size[0], size[1]))
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else:
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image = image.crop((0, 0, xpos + 1, size[1]))
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draw = ImageDraw.Draw(image)
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# settings.FILTER_FUNCTION(image)
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noise_default(image, draw)
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out = StringIO()
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image.save(out, 'PNG')
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# image.save('ss.png', 'PNG')
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content = out.getvalue()
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out.seek(0)
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out.close()
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return content
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