Django框架使用内置方法实现登录功能详解

本文实例讲述了Django框架使用内置方法实现登录功能。分享给大家供大家参考，具体如下：

一 内置登录退出思维导图

二 Django内置登录方法

1 位置

2 源码

@deprecate_current_app
@sensitive_post_parameters()
@csrf_protect
@never_cache
# 视图函数要渲染的模板位置（registration/login.html）
def login(request, template_name='registration/login.html',
    redirect_field_name=REDIRECT_FIELD_NAME,
    authentication_form=AuthenticationForm,
    extra_context=None, redirect_authenticated_user=False):
 """
 Displays the login form and handles the login action.
 """
 redirect_to = request.POST.get(redirect_field_name, request.GET.get(redirect_field_name, ''))
 if redirect_authenticated_user and request.user.is_authenticated:
   redirect_to = _get_login_redirect_url(request, redirect_to)
   if redirect_to == request.path:
     raise ValueError(
       "Redirection loop for authenticated user detected. Check that "
       "your LOGIN_REDIRECT_URL doesn't point to a login page."
     )
   return HttpResponseRedirect(redirect_to)
 elif request.method == "POST":
   form = authentication_form(request, data=request.POST)
   if form.is_valid():
     auth_login(request, form.get_user())
     return HttpResponseRedirect(_get_login_redirect_url(request, redirect_to))
 else:
   form = authentication_form(request)
 current_site = get_current_site(request)
 context = {
   'form': form,
   redirect_field_name: redirect_to,
   'site': current_site,
   'site_name': current_site.name,
 }
 if extra_context is not None:
   context.update(extra_context)
 return TemplateResponse(request, template_name, context)

三 实战一 

1 编辑mysite/account/urls.py

from django.conf.urls import url
from . import views
from django.contrib.auth import views as auth_views
urlpatterns = [
 # 自定义登录
 # url(r'^login/$', views.user_login, name='user_login'),
 # django内置的登录
 url(r"^login/$", auth_views.login, name="user_login"),
]

2 因为默认的模板位置为registration/login.html，因此我们创建该文档如下：

{％ extends "base.html" ％}
{％ block title ％}登录{％ endblock ％}
{％ block content ％}
<div class="row text-center vertical-middle-sm">
<h1>登录</h1>
<p>请输入用户名和密码</p>
 <!--用具体的URL指明了数据的POST目标-->
<form class="form-horizontal" action="{％ url 'account:user_login' ％}" method="post">
{％ csrf_token ％}
   <!--每个表单元素在一对P标签内-->
   <!--{{ form.as_p }}-->
   <!--使用Bootstrap样式使得表单更美丽-->
   <div class="form-group">
 <label for="{{ form.username.id_for_label }}" class="col-md-5 control-label" style="color:red"><span class="glyphicon glyphicon-user"></span>Username</label>
 <div class="col-md-6 text-left">{{ form.username }}</div>
</div>
<div class="form-group">
 <label for="{{ form.password.id_for_label }}" class="col-md-5 control-label" style="color:blue"><span class="glyphicon glyphicon-floppy-open"></span>Password</label>
 <div class="col-md-6 text-left">{{ form.password }}</div>
</div>
<input type="submit" value="Login">
</form>
</div>
{％ endblock ％}

3 修改mysite/mysite/settings.py

# 登录后重定向到http://localhost:8000/blog/页面
LOGIN_REDIRECT_URL = '/blog/'

4 测试

四 实战二

1 编辑mysite/account/urls.py

from django.conf.urls import url
from . import views
from django.contrib.auth import views as auth_views
urlpatterns = [
 # 自定义登录
 # url(r'^login/$', views.user_login, name='user_login'),
 # django内置的登录
 url(r"^login/$", auth_views.login, name="user_login"),
 url(r"^new-login/$", auth_views.login, {"template_name": "account/login.html"}),
]

2 测试

希望本文所述对大家基于Django框架的Python程序设计有所帮助。

来源：https://blog.csdn.net/chengqiuming/article/details/85106234