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点击倒字验证码

简介

点击倒字验证码,仿照知乎验证码效果实现, 用户通过点击验证码上面的倒着的汉字, 从而通过验证码验证。

环境条件

  • Python>=3.4
  • Django>=1.9

安装

Using pip:

$ pip install django_click_captcha

or from source code:

$ pip install -e git+https://github.com/malongge/click_captcha.git#egg=click_captcha

将 click_captcha 加到 INSTALL_APPS 列表当中

使用方法

配置:

CLICK_CAPTCHA_WIDGET_TEMPLATE: 验证码模板代码, 默认为 click_captcha/captcha.html

CLICK_CAPTCHA_TIMEOUT: 验证码过期时间, 默认为 60 秒

CACHE_BACKEND: 验证码缓存服务, 默认为数据库: django.core.cache.backends.db.DatabaseCache

因此如果使用默认的缓存服务,需要执行下面的命令 python manage.py createcachetable 创建缓存表

urls.py 添加获得验证码的地址:

from django.conf.urls import url

from click_captcha import views

urlpatterns = [
    url(r'click_captcha/(?P<uuid>\w+)/$', views.CaptchaView.as_view(), name='click_captcha'),
]

加载样式标签:

{ % load click_captcha_tags % }
...
{ % include_click_captcha_css  False % }
...
{ % include_click_captcha_js False % }

如果希望用安装包自带的 bootstrap 和 jquery 去掉 False 参数

添加 form 表单, 比如 admin 登录配置:

from django.contrib.admin.forms import (
AdminAuthenticationForm as _AdminAuthenticationForm
)
from django.forms import ValidationError

from click_captcha.fields import CaptchaField


class AuthenticationForm(_AdminAuthenticationForm):
    field_order = ['captcha', 'username', 'password']

    captcha = CaptchaField()

    def _clean_fields(self):
        for name, field in self.fields.items():
            value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name))
            try:
                value = field.clean(value)
                self.cleaned_data[name] = value
                if hasattr(self, 'clean_%s' % name):
                    value = getattr(self, 'clean_%s' % name)()
                    self.cleaned_data[name] = value
            except ValidationError as e:
                self.add_error(name, e)
                return

这里 _clean_fields 是想先进行验证码校验, 如果验证码校验不成功就不进行用户和密码的验证码了

新建个 sites.py, 替换原来的 login form:

from django.contrib.admin.sites import AdminSite as _AdminSite

from apps.authentication.forms import AuthenticationForm
from apps.authentication.models import User

class MyAdminSite(_AdminSite):
    login_form = AuthenticationForm
    login_template = 'click_captcha/login.html'


admin_site = MyAdminSite(name='myadmin')
admin_site.register(User)

在 login.html 中加上验证码 form 字段:

{ % load click_captcha_tags %}

{ % block extrastyle %}
    { % include_click_captcha_css  False %}
{ % endblock %}

... ...
{ # form 表单下插入 #}
   <div class="{ % if form.captcha.errors %} error{ % endif %}">
        {{ form.captcha }}
   </div>
... ...
{ % block extrajs %}
  { % include_click_captcha_js False %}
{ % endblock %}

效果图

https://malongge.github.io/assets/django/captcha-django.gif

备注信息

该项目不支持 python 2 版本, django 版本必需高于 django 1.9

该项目有一系列文章的介绍其是如何开发的过程, 可以参考文章来定制自己的验证码

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