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' ) |
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