在网站开发的登录页面中,经常会需要使用到图形验证码来验证。在Django中,django-simple-captcha库包提供了图形验证码的使用。
下面我们来讲讲如何使用django-simple-captcha包来图形验证,并且点击图片刷新验证码。
django-simple-captcha的安装
pip install django-simple-captcha
在settings.py文件中注册captcha
INSTALLED_APPS = [
'captcha'
]
在settings.py文件中设置图形验证码的样式
#字母验证码
CAPTCHA_IMAGE_SIZE = (80, 45) # 设置 captcha 图片大小
CAPTCHA_LENGTH = 4 # 字符个数
CAPTCHA_TIMEOUT = 1 # 超时(minutes)
#加减乘除验证码
CAPTCHA_OUTPUT_FORMAT = '%(image)s %(text_field)s %(hidden_field)s '
CAPTCHA_NOISE_FUNCTIONS = ('captcha.helpers.noise_null',
'captcha.helpers.noise_arcs', # 线
'captcha.helpers.noise_dots', # 点
)
CAPTCHA_CHALLENGE_FUNCT = 'captcha.helpers.random_char_challenge'
CAPTCHA_CHALLENGE_FUNCT = 'captcha.helpers.math_challenge'
CAPTCHA_TIMEOUT = 1
执行数据迁移,在数据表中生成captcha_captchastore表
python manage.py migrate
在urls.py中添加路由
urlpatterns = [
path('captcha/', include('captcha.urls')), # 图片验证码 路由
path('refresh_captcha/', views.refresh_captcha), # 刷新验证码,ajax
]
下面是源代码。
urls.py文件
from django.urls import path
from django.conf.urls import include
from App.views import IndexView
from App import views
urlpatterns = [
path('captcha/', include('captcha.urls')),
path('refresh_captcha/',views.refresh_captcha),
path('',IndexView.as_view()),
]
views.py文件
from django.shortcuts import render
from django.views.generic import View
from captcha.models import CaptchaStore
from captcha.helpers import captcha_image_url
from django.http import HttpResponse
import json
# 创建验证码
def captcha():
hashkey = CaptchaStore.generate_key() #验证码答案
image_url = captcha_image_url(hashkey) #验证码地址
captcha = {'hashkey': hashkey, 'image_url': image_url}
return captcha
#刷新验证码
def refresh_captcha(request):
return HttpResponse(json.dumps(captcha()), content_type='application/json')
# 验证验证码
def jarge_captcha(captchaStr, captchaHashkey):
if captchaStr and captchaHashkey:
try:
# 获取根据hashkey获取数据库中的response值
get_captcha = CaptchaStore.objects.get(hashkey=captchaHashkey)
if get_captcha.response == captchaStr.lower(): # 如果验证码匹配
return True
except:
return False
else:
return False
class IndexView(View):
def get(self, request):
hashkey = CaptchaStore.generate_key() # 验证码答案
image_url = captcha_image_url(hashkey) # 验证码地址
captcha = {'hashkey': hashkey, 'image_url': image_url}
return render(request, "login.html", locals())
def post(self,request):
capt=request.POST.get("captcha",None) #用户提交的验证码
key=request.POST.get("hashkey",None) #验证码答案
if jarge_captcha(capt,key):
return HttpResponse("验证码正确")
else:
return HttpResponse("验证码错误")
login.html文件,这里使用 js 动态刷新图形验证码用到了jquery和bootstrap的js,所以,我们提前将jquery和bootstrap放在了static文件夹下。关于如何加载静态文件,传送门——>Django加载静态文件
{% load static %}
Title
参考文章:https://blog.csdn.net/qq_37648632/article/details/83149803
本文所有代码:https://github.com/xie1997/Django_captcha