Python生成验证码实例

本文实例展示了Python生成验证码的方法，具有很好的实用价值。分享给大家供大家参考。具体实现方法如下：

前台页面代码如下：

<div> <img id="authcode_img" alt="验证码" src="/registration/makeimage/{{time}}"/>   <!-- time 任意随机数（时间戳），防止页面缓存 导致验证码不能更新--> <a href="javascript:refreshCode();" rel="external nofollow" style="color:blue;">看不清换一张</a></div><script> function refreshCode() {   $('authcode_img').src = "/registration/makeimage/" + Math.random(); }</script>

后台程序如下：

import StringIOimport Image, ImageDraw, ImageFont, random  #相应的模块需要安装from xxx.settings import authcode_font #请确保改字体存在def make_image(request):  mp = hashlib.md5()  mp.update(str(datetime.datetime.now())+str(random.random()))    mp_src = mp.hexdigest()  rand_str = mp_src[0:6]  font = ImageFont.truetype(authcode_font, 25)  width = 75  height = 30  im = Image.new('RGB',(width,height),'#%s'%mp_src[-7:-1])  draw = ImageDraw.Draw(im)  draw.line((random.randint(0,width),random.randint(0,height),random.randint(0,width),random.randint(0,height)))  draw.line((random.randint(0,width),random.randint(0,height),random.randint(0,width),random.randint(0,height)))  draw.line((random.randint(0,width),random.randint(0,height),random.randint(0,width),random.randint(0,height)))  draw.line((random.randint(0,width),random.randint(0,height),random.randint(0,width),random.randint(0,height)))  draw.line((random.randint(0,width),random.randint(0,height),random.randint(0,width),random.randint(0,height)))  draw.text((5,2), rand_str, font=font)    del draw    buffer = StringIO.StringIO()  im.save(buffer,'jpeg')  httpResponse = HttpResponse(content=buffer.getvalue(),mimetype="image/jpeg")  request.session['auth_code'] = rand_str  return httpResponse

程序效果如下：