验证码

用PIL生成验证码

check_code.py

import random, string from PIL 

import Image,ImageDraw,ImageFont,ImageFilter

#生成随机字符串

def getRandomChar():

#string模块包含各种字符串，以下为小写字母加数字

ran = string.ascii_lowercase + string.digits

char ='' "

for i in range(4):

    char += random.choice(ran)

    return char

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#返回一个随机的RGB颜色

def getRandomColor():

          return(random.randint(50,150), random.randint(50,150),random.randint(50,150))

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def create_code():

#创建图片，模式，大小，背景色

        img = Image.new('RGB', (120,30), (255,255,255))

#创建画布

        draw = ImageDraw.Draw(img)

#设置字体

        font = ImageFont.truetype('Arial.ttf',25)

        code = getRandomChar()

#将生成的字符画在画布上

        for t in range(4):

                draw.text((30*t+5,0),code[t],getRandomColor(),font)

#生成干扰点

        for _ in range(random.randint(0,50)):

#位置，颜色

                draw.point((random.randint(0,120), random.randint(0,30)),fill=getRandomColor())

#使用模糊滤镜使图片模糊

         img = img.filter(ImageFilter.BLUR)

#保存#

        img.save(''.join(code)+'.jpg','jpeg')

        return img,code 

if__name__ =='__main__':

create_code()

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views.py（部分）

from SchoolBuy.utils import check_code

from io impor tBytesIO

from django.http import HttpResponse,Http404

def create_code_img(request):

#在内存中开辟空间用以生成临时的图片

        f = BytesIO()

        img,code = check_code.create_code()

        request.session['check_code'] = code

        img.save(f,'PNG')

        return HttpResponse(f.getvalue())

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utls.py(部分)

url(r'^create_code/$',views.create_code_img),

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显示图片及判断

test_code.html