django 实现用户注册、登录、退出

1用户注册： 

from django.contrib import auth
from django.contrib.auth.models import User
from django.views.decorators.csrf import csrf_exempt
from django.http import HttpResponseRedirect

# 用户注册
@csrf_exempt
def register(request):
    errors = []
    account = None
    password = None
    password2 = None
    email = None
    CompareFlag = False

    if request.method == 'POST':
        if not request.POST.get('account'):
            errors.append('用户名不能为空')
        else:
            account = request.POST.get('account')

        if not request.POST.get('password'):
            errors.append('密码不能为空')
        else:
            password = request.POST.get('password')
        if not request.POST.get('password2'):
            errors.append('确认密码不能为空')
        else:
            password2 = request.POST.get('password2')
        if not request.POST.get('email'):
            errors.append('邮箱不能为空')
        else:
            email = request.POST.get('email')

        if password is not None:
            if password == password2:
                CompareFlag = True
            else:
                errors.append('两次输入密码不一致')

        if account is not None and password is not None and password2 is not None and email is not None and CompareFlag :
            user = User.objects.create_user(account,email,password)
            user.save()

            userlogin = auth.authenticate(username = account,password = password)
            auth.login(request,userlogin)
            return HttpResponseRedirect('/blog')

    return render(request,'blog/register.html', {'errors': errors})

2 用户登录：

@csrf_exempt
def my_login(request):
    errors =[]
    account = None
    password = None
    if request.method == "POST":
        if not request.POST.get('account'):
            errors.append('用户名不能为空')
        else:
            account = request.POST.get('account')

        if not request.POST.get('password'):
            errors = request.POST.get('密码不能为空')
        else:
            password = request.POST.get('password')

        if account is not None and password is not None:
            user = auth.authenticate(username=account,password=password)
            if user is not None:
                if user.is_active:
                    auth.login(request,user)
                    return HttpResponseRedirect('/blog')
                else:
                    errors.append('用户名错误')
            else:
                errors.append('用户名或密码错误')
    return render(request,'blog/login.html', {'errors': errors})

3 用户退出： 

def my_logout(request):
    auth.logout(request)
    return HttpResponseRedirect('/blog')

 URL：

urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^p/(?P[0-9]+)/$', views.detail,name='detail'),
    url(r'^register/$',views.register, name='register'),
    url(r'^login/$',views.my_login, name='my_login'),
    url(r'^logout/$',views.my_logout, name='my_logout'),
]

注册 HTML:

    
    



{% if errors %}
        


            {% for error in errors %}
             

                {{error}}
             
              {% endfor %}
        
    {% endif %}
{% csrf_token %}

        

    

            

                用户名:
            
            

                
            
        
        

            

                密码:
            
            

              
            
        
         

             

                确认密码:
             
             

                 
             

         
         

             

                 邮箱:
             
             

                 
             
         
          


              

                   
              
          
    

登录HTML: 

    
    





    
    



{% if errors %}
        


            {% for error in errors %}
             

                {{error}}
             
              {% endfor %}
        
    {% endif %}
{% csrf_token %}

        

    

            

                用户名:
            
            

                
            
        
        

            

                密码: