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 %}

 
登录
 
请输入用户名和密码
  
 

 {% csrf_token %}
    
    
    
    

  Username
  
{{ form.username }}
 
 

  Password
  
{{ form.password }}
 
 
 

{% 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。