def generate_captcha(request):
    color = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
    img = Image.new('RGBA', (160, 80), color)
    imgDrawer = ImageDraw.Draw(img)
    textImg = Image.new('RGBA', (160, 80))
    tmpDraw = ImageDraw.Draw(textImg)
    font = ImageFont.truetype("resources/UbuntuMono-RI.ttf", 26)
    i = 15
    key = []
    for x in xrange(1, 7):
        r = str(random.randint(0, 9))
        key.append(r)
        tmpDraw.text((i, random.randint(20, 30)), r,
                     font=font, fill=(0, 0, 0))
        i += 22
    request.session['captcha'] = ''.join(key)
    for o in xrange((80 * 160) / 500):
        imgDrawer.line((random.randint(0, 160), random.randint(0, 80), random.randint(0, 160), random.randint(0, 80)),
                       fill=(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)))
    output = StringIO.StringIO()
    textImg = textImg.rotate(random.randint(-20, 20))
    mask = Image.new('RGBA', (160, 80), (0, 0, 0))
    mask.paste(textImg, (0, 0))
    img.paste(textImg, (0, 0), mask)
    img.save(output, format='png')
    return StreamingHttpResponse([output.getvalue()], content_type="image/png")