(编辑：jimmy 日期: 2024/11/16 浏览：2)
本文实例讲述了Django框架验证码用法。分享给大家供大家参考，具体如下：
验证码
1、作用
2、业务流程
绘制验证码图片
background = (10,20,30) // RGB颜色
初始化画布
image = Image.new(‘RGB',(100,50),background)
获取画布中画笔对象
draw = ImageDraw.Draw(image)
绘制验证码，随机四个
font = ImageFont.truetype(‘path',size) fontcolor = (20,40,60) draw.text((x,y),'R',font,fontcolor)
返回验证码内容
# 删除画笔 del draw #保存图片到BytesIO对象 Import io buf = io.BytesIO() image.save(buf,'png') #返回BytesIO中的内容 return HttpResponse(buf.getvalue(),'image/png')
3、代码范例
html页面
<form method="post" action="{% url 'sitesApp:login' %}">
{% csrf_token %}
<div class="login">
<div class="input-group">
<span class="input-group-addon" id="basic-addon1">用户名</span>
<input type="text" class="form-control" placeholder="Username" aria-describedby="basic-addon1" name="uName">
</div>
<div class="input-group">
<span class="input-group-addon" id="basic-addon1">密 码</span>
<input type="text" class="form-control" placeholder="Password" aria-describedby="basic-addon1" name="uPswd">
</div>
<div class="input-group">
<span class="input-group-addon" id="basic-addon1">验证码</span>
<input type="text" class="form-control" placeholder="Auth code" aria-describedby="basic-addon1" name="uCode">
</div>
<div class="vcode">
<img src="/UploadFiles/2021-04-08/">
views视图
'''
生成并返回验证码
'''
def getvcode(request):
# 随机生成验证码
population = string.ascii_letters+string.digits
letterlist = random.sample(population,4)
vcode = ''.join(letterlist)
# 保存该用户的验证码
request.session['vcode']=vcode
# 绘制验证码
# 需要画布,长宽颜色
image = Image.new('RGB',(176,60),color=getRandomColor())
# 创建画布的画笔
draw = ImageDraw.Draw(image)
# 绘制文字，字体所在位置
path = os.path.join(BASE_DIR,'static','fonts','ADOBEARABIC-BOLDITALIC.OTF')
font = ImageFont.truetype(path,50)
for i in range(len(vcode)):
draw.text((20+40*i,0),vcode[i],fill=getRandomColor(),font=font)
# 添加噪声
for i in range(500):
position = (random.randint(0,176),random.randint(0,50))
draw.point(position,fill=getRandomColor())
# 返回验证码字节数据
# 创建字节容器
buffer = io.BytesIO()
# 将画布内容丢入容器
image.save(buffer,'png')
# 返回容器内的字节
return HttpResponse(buffer.getvalue(),'image/png')
# 获取随机颜色
def getRandomColor():
red = random.randint(0,255)
green = random.randint(0,255)
blue = random.randint(0,255)
return (red,green,blue)
希望本文所述对大家基于Django框架的Python程序设计有所帮助。