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import logging
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from django.utils.translation import gettext_lazy as _
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from django.conf import settings
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from django.contrib import auth
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from django.contrib.auth import REDIRECT_FIELD_NAME
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from django.contrib.auth import get_user_model
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from django.contrib.auth import logout
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from django.contrib.auth.forms import AuthenticationForm
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from django.contrib.auth.hashers import make_password
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from django.http import HttpResponseRedirect, HttpResponseForbidden, HttpResponse
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from django.http.request import HttpRequest
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from django.shortcuts import get_object_or_404, render
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from django.urls import reverse
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from django.utils.decorators import method_decorator
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from django.utils.http import url_has_allowed_host_and_scheme
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from django.views import View
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from django.views.decorators.cache import never_cache
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from django.views.decorators.csrf import csrf_protect
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from django.views.decorators.debug import sensitive_post_parameters
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from django.views.generic import FormView, RedirectView
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from djangoblog.utils import send_email, get_sha256, get_current_site, generate_code, delete_sidebar_cache
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from . import utils
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from .forms import RegisterForm, LoginForm, ForgetPasswordForm, ForgetPasswordCodeForm
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from .models import BlogUser
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logger = logging.getLogger(__name__) # 初始化日志记录器
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# ------------------------- 注册视图 -------------------------
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class RegisterView(FormView):
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"""用户注册视图"""
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form_class = RegisterForm
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template_name = 'account/registration_form.html' # 注册页面模板路径
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@method_decorator(csrf_protect) # 防止CSRF攻击
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def dispatch(self, *args, **kwargs):
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return super(RegisterView, self).dispatch(*args, **kwargs)
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def form_valid(self, form):
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"""当表单验证通过时调用"""
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if form.is_valid():
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user = form.save(False) # 保存用户但不提交数据库
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user.is_active = False # 新注册用户默认未激活
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user.source = 'Register' # 标记注册来源
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user.save(True) # 保存到数据库
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site = get_current_site().domain # 获取当前站点域名
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sign = get_sha256(get_sha256(settings.SECRET_KEY + str(user.id))) # 生成验证签名
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if settings.DEBUG: # 开发环境下替换站点域名
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site = '127.0.0.1:8000'
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# 生成邮箱验证链接
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path = reverse('account:result')
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url = "http://{site}{path}?type=validation&id={id}&sign={sign}".format(
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site=site, path=path, id=user.id, sign=sign)
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# 邮件内容
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content = """
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<p>请点击下面链接验证您的邮箱</p>
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<a href="{url}" rel="bookmark">{url}</a>
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再次感谢您！
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<br />
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如果上面链接无法打开，请将此链接复制至浏览器。
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{url}
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""".format(url=url)
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# 发送验证邮件
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send_email(
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emailto=[user.email],
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title='验证您的电子邮箱',
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content=content
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)
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# 注册成功后跳转到结果页面
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url = reverse('accounts:result') + '?type=register&id=' + str(user.id)
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return HttpResponseRedirect(url)
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else:
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# 验证失败重新渲染表单
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return self.render_to_response({'form': form})
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# ------------------------- 登出视图 -------------------------
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class LogoutView(RedirectView):
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"""用户登出视图"""
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url = '/login/' # 登出后跳转页面
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@method_decorator(never_cache) # 禁止页面缓存
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def dispatch(self, request, *args, **kwargs):
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return super(LogoutView, self).dispatch(request, *args, **kwargs)
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def get(self, request, *args, **kwargs):
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logout(request) # 注销当前用户
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delete_sidebar_cache() # 清理缓存
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return super(LogoutView, self).get(request, *args, **kwargs)
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# ------------------------- 登录视图 -------------------------
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class LoginView(FormView):
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"""用户登录视图"""
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form_class = LoginForm
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template_name = 'account/login.html'
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success_url = '/' # 登录成功默认跳转首页
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redirect_field_name = REDIRECT_FIELD_NAME
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login_ttl = 2626560 # “记住我”有效期（30天）
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@method_decorator(sensitive_post_parameters('password')) # 标记敏感字段
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@method_decorator(csrf_protect)
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@method_decorator(never_cache)
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def dispatch(self, request, *args, **kwargs):
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return super(LoginView, self).dispatch(request, *args, **kwargs)
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def get_context_data(self, **kwargs):
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"""为模板提供重定向参数"""
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redirect_to = self.request.GET.get(self.redirect_field_name)
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if redirect_to is None:
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redirect_to = '/'
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kwargs['redirect_to'] = redirect_to
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return super(LoginView, self).get_context_data(**kwargs)
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def form_valid(self, form):
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"""登录逻辑"""
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form = AuthenticationForm(data=self.request.POST, request=self.request)
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if form.is_valid():
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delete_sidebar_cache() # 清除缓存
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logger.info(self.redirect_field_name)
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auth.login(self.request, form.get_user()) # 登录用户
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if self.request.POST.get("remember"): # 如果勾选“记住我”
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self.request.session.set_expiry(self.login_ttl)
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return super(LoginView, self).form_valid(form)
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else:
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# 登录失败，重新渲染页面
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return self.render_to_response({'form': form})
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def get_success_url(self):
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"""登录成功后跳转路径校验"""
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redirect_to = self.request.POST.get(self.redirect_field_name)
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if not url_has_allowed_host_and_scheme(
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url=redirect_to, allowed_hosts=[self.request.get_host()]
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):
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redirect_to = self.success_url
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return redirect_to
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# ------------------------- 注册与验证结果视图 -------------------------
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def account_result(request):
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"""注册或邮箱验证结果页"""
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type = request.GET.get('type')
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id = request.GET.get('id')
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user = get_object_or_404(get_user_model(), id=id) # 获取用户对象
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logger.info(type)
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if user.is_active: # 若已激活，直接跳转首页
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return HttpResponseRedirect('/')
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if type and type in ['register', 'validation']:
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if type == 'register':
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content = '''
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恭喜您注册成功，一封验证邮件已经发送到您的邮箱，请验证您的邮箱后登录本站。
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'''
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title = '注册成功'
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else:
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# 验证签名
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c_sign = get_sha256(get_sha256(settings.SECRET_KEY + str(user.id)))
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sign = request.GET.get('sign')
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if sign != c_sign:
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return HttpResponseForbidden() # 签名不符禁止访问
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user.is_active = True # 激活账号
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user.save()
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content = '''
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恭喜您已经成功的完成邮箱验证，您现在可以使用您的账号来登录本站。
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'''
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title = '验证成功'
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# 渲染结果模板
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return render(request, 'account/result.html', {
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'title': title,
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'content': content
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})
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else:
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return HttpResponseRedirect('/')
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# ------------------------- 忘记密码视图 -------------------------
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class ForgetPasswordView(FormView):
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"""忘记密码（直接重置密码）"""
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form_class = ForgetPasswordForm
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template_name = 'account/forget_password.html'
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def form_valid(self, form):
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if form.is_valid():
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# 通过邮箱查找用户
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blog_user = BlogUser.objects.filter(email=form.cleaned_data.get("email")).get()
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# 更新加密后的新密码
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blog_user.password = make_password(form.cleaned_data["new_password2"])
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blog_user.save()
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return HttpResponseRedirect('/login/') # 修改成功后跳转登录页
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else:
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return self.render_to_response({'form': form})
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# ------------------------- 发送邮箱验证码视图 -------------------------
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class ForgetPasswordEmailCode(View):
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"""用于发送找回密码邮箱验证码"""
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def post(self, request: HttpRequest):
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form = ForgetPasswordCodeForm(request.POST)
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if not form.is_valid():
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return HttpResponse("错误的邮箱") # 邮箱格式错误
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to_email = form.cleaned_data["email"]
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code = generate_code() # 生成随机验证码
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utils.send_verify_email(to_email, code) # 发送验证码邮件
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utils.set_code(to_email, code) # 将验证码写入缓存或数据库
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return HttpResponse("ok") # 返回成功响应
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