django-simple-captcha是django的验证码包，非常简单实用，这次记录的是如何点击验证码后刷新验证码，因为这个功能官方文档并没有详细给出。
django-simple-captcha官方文档：http://django-simple-captcha.readthedocs.io/en/latest/
django-simple-captcha的github网址：https://github.com/mbi/django-simple-captcha
参考:https://blog.csdn.net/qq_36119192/article/details/88017277
开始
1.安装 pip install django-simple-captcha， pip install Pillow
2.将captcha 加入 settings.py 的 INSTALLED_APPS
3.运行 python manage.py makemigrations 和 python manage.py migrate
4.url路由加入urls.py的urlpatterns
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 path('test/',IndexView.as_view()), #get与post请求路径 ]
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 print(hashkey,image_url) 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")
6.templates文件夹下login.html的内容
{% load static %}
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.0.0/js/bootstrap.js"></script>
</head>
<body>
<form action="/test/" method="post">
{% csrf_token %}
<a href="#" class="captcha">
<img src="{{ captcha.image_url }}" alt="点击切换" id="id_captcha" >
</a> <br>
<input type="text" name="captcha" placeholder="验证码"> <br>
<input value="{{ captcha.hashkey }}" name="hashkey" type="hidden" id="id_captcha_0">
<button type="submit" class="btn btn-primary btn-block ">提交</button>
</form>
<script>
<!-- 动态刷新验证码js -->
$(document).ready(function(){
$('.captcha').click(function () {
$.getJSON("/refresh_captcha/", function (result) {
$('#id_captcha').attr('src', result['image_url']);
$('#id_captcha_0').val(result['hashkey'])
});
});
});
</script>
</body>
</html>
django-simple-captcha并没有使用session对验证码进行存储，而是使用了数据库，当你在做数据库迁移的时候会生成一个表 captcha_captchastore ，包含以下字段
challenge = models.CharField(blank=False, max_length=32) # 验证码大写或者数学计算比如 1+1 response = models.CharField(blank=False, max_length=32) # 需要输入的验证码 验证码小写或数学计算的结果 比如 2 hashkey = models.CharField(blank=False, max_length=40, unique=True) # hash值 expiration = models.DateTimeField(blank=False) # 到期时间