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 src="/static/imghw/default1.png"  data-src="/registration/makeimage/{{time}}"  class="lazy"  id="authcode_img" alt="验证码"/>  
 <!-- 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 StringIO
import 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：

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn