在Django中实现验证码

时间：2009-08-14 来源：hkebao

在项目中用到验证码，懒得去找，自己随便写了一个： views.py:

def get_check_code_image(request,image='media/images/checkcode.gif'):
    import Image, ImageDraw, ImageFont, random
    im = Image.open(image)
    draw = ImageDraw.Draw(im)
    mp = md5.new()
    mp_src = mp.update(str(datetime.now()))
    mp_src = mp.hexdigest()
    rand_str = mp_src[0:4]
    draw.text((10,10), rand_str[0], font=ImageFont.truetype("ARIAL.TTF", random.randrange(25,50)))
    draw.text((48,10), rand_str[1], font=ImageFont.truetype("ARIAL.TTF", random.randrange(25,50)))
    draw.text((85,10), rand_str[2], font=ImageFont.truetype("ARIAL.TTF", random.randrange(25,50)))
    draw.text((120,10), rand_str[3], font=ImageFont.truetype("ARIAL.TTF", random.randrange(25,50)))
    del draw
    request.session['checkcode'] = rand_str
    buf = cStringIO.StringIO()
    im.save(buf, 'gif')
    return HttpResponse(buf.getvalue(),'image/gif') urls.py:

from django.conf.urls.defaults import *

urlpatterns = patterns('tracer_server.apps.user.views',
    # Uncomment this for admin:
    # (r'^admin/', include('django.contrib.admin.urls')),

    (r'^get_check_code_image/$', 'get_check_code_image'),

)   template:

<img onclick="this.setAttribute('src','/user/get_check_code_image/?nocache='+Math.random());" src="/user/get_check_code_image/" alt="CheckCode"/> 原文地址：[url]http://openexperience.javaeye.com/blog/157549[/url] 转者注:

这个例子还需要下载Python Imaging Library(PIL),这里下载最新版本[url]http://www.pythonware.com/products/pil/index.htm#pil116[/url]
还需要导入的模块:from datetime import datetime, import md5, cStringIO