django 验证码例子

参考 http://pythoner.net/code/8/

views.py

import ImageFont,Image,ImageDraw,random
from cStringIO import StringIO

def display(request):
    """
    background  #随机背景颜色
    line_color #随机干扰线颜色
    img_width = #画布宽度
    img_height = #画布高度
    font_color = #验证码字体颜色
    font_size = #验证码字体尺寸
    font = I#验证码字体
    """
    string = {'number':'12345679',
              'litter':'ACEFGHKMNPRTUVWXY'}
    background = (random.randrange(230,255),random.randrange(230,255),random.randrange(230,255))
    line_color = (random.randrange(0,255),random.randrange(0,255),random.randrange(0,255))
    img_width = 58
    img_height = 30
    font_color = ['black','darkblue','darkred']
    font_size = 14
    font = ImageFont.truetype('msyh.ttf',font_size)
    request.session['verify'] = ''
 
    #新建画布
    im = Image.new('RGB',(img_width,img_height),background)
    draw = ImageDraw.Draw(im)
    code = random.sample(string['litter'],4)
    #code  = u'和谐社会'
    #新建画笔
    draw = ImageDraw.Draw(im)
 
    #画干扰线
    for i in range(random.randrange(3,5)):
        xy = (random.randrange(0,img_width),random.randrange(0,img_height),
              random.randrange(0,img_width),random.randrange(0,img_height))
        draw.line(xy,fill=line_color,width=1)
     
    #写入验证码文字
    x = 2
    for i in code:
        y = random.randrange(0,10)
        draw.text((x,y), i, font=font, fill=random.choice(font_color))
        x += 14
        request.session['verify'] += i
    del x
     
    del draw
    buf = StringIO()
    im.save(buf,'gif')
    buf.seek(0)
    return HttpResponse(buf.getvalue(),'image/gif')