本文实例讲述了django框架登录加上验证码校验实现验证功能。分享给大家供大家参考,具体如下:
验证码生成函数
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pip install pillow
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# /verify_code
def verif_ycode(request):
#引入绘图模块
from pil import image, imagedraw, imagefont
#引入随机函数模块
import random
#定义变量,用于画面的背景色、宽、高
bgcolor = (random.randrange( 20 , 100 ), random.randrange(
20 , 100 ), random.randrange( 20 , 100 ))
width = 100
height = 50
#创建画面对象
im = image.new( 'rgb' , (width, height), bgcolor)
#创建画笔对象
draw = imagedraw.draw(im)
#调用画笔的point()函数绘制噪点
for i in range ( 0 , 100 ):
xy = (random.randrange( 0 , width), random.randrange( 0 , height))
fill = (random.randrange( 0 , 255 ), 255 , random.randrange( 0 , 255 ))
draw.point(xy, fill = fill)
#定义验证码的备选值
str = '1234567890qwertyuiopasdfghjklzxcvbnmqwertyuiopasdfghjklzxcvbnm'
#随机选取4个值作为验证码
rand_str = ''
for i in range ( 0 , 4 ):
rand_str + = str [random.randrange( 0 , len ( str ))]
#构造字体对象
# font = imagefont.truetype('楷体', 40)
#构造字体颜色
fontcolor1 = ( 255 , random.randrange( 0 , 255 ), random.randrange( 0 , 255 ))
fontcolor2 = ( 255 , random.randrange( 0 , 255 ), random.randrange( 0 , 255 ))
fontcolor3 = ( 255 , random.randrange( 0 , 255 ), random.randrange( 0 , 255 ))
fontcolor4 = ( 255 , random.randrange( 0 , 255 ), random.randrange( 0 , 255 ))
#绘制4个字
draw.text(( 5 , 2 ), rand_str[ 0 ], fill = fontcolor1)
draw.text(( 25 , 2 ), rand_str[ 1 ], fill = fontcolor2)
draw.text(( 50 , 2 ), rand_str[ 2 ], fill = fontcolor3)
draw.text(( 75 , 2 ), rand_str[ 3 ], fill = fontcolor4)
#释放画笔
del draw
# 存入session,用于做进一步验证
request.session[ 'verifycode' ] = rand_str
#内存文件操作
import io
buf = io.bytesio()
#将图片保存在内存中,文件类型为png
im.save(buf, 'png' )
#将内存中的图片数据返回给客户端,mime类型为图片png
return httpresponse(buf.getvalue(), 'image/png' )
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login.html
html文件加上<img src="/verify_code" python" id="highlighter_756147">
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# 获取验证码
vcode1
=
request.post.get(
'vcode'
)
# 用户输入的验证码
vcode2
=
request.session.get(
'verifycode'
)
# 获取session中保存的验证码