登录

cookie实现简单登录

request.path_info获取url后缀，http://127.0.0.1:8000/home/?zx=22，获取/home/
request.get_full_path()获取后缀包括get请求的参数 /home/?zx=22

def login(request):
    if request.method == 'POST':
        username = request.POST.get('username')
        password= request.POST.get('password')
        if username == 'zx' and password == 'zx125':
            old_path = request.GET.get('next')
            if old_path:
                obj = redirect(old_path)
            else:
                obj = redirect('/home')
            obj.set_cookie('name','zx')
            return obj
    return render(request,'login.html')
    
from functools import wraps
#登录装饰器
def login_auth(func):
    @wraps(func)
    def inner(request,*args,**kwargs):
        if request.COOKIES.get('name'):
            res = func(request,*args,**kwargs)
            return res
        else:
            target_url = request.path_info
            print(target_url)
            print(request.get_full_path())
            return redirect(f'/login?next={target_url}')
    return inner

@login_auth
def home(request):
    return render(request,'home.html')

session和cookie实现登录

其实和上面的逻辑差不多，基本一样，利用了设置session会默认在浏览器设置一个cookie用来存session_id,同时加入了注销功能

重点:重点要知道下面两个的区别和使用

request.session.delete()  # 删除当前会话的所有Session数据

request.session.flush()  # 删除当前的会话Session并删除Cookie

from django.shortcuts import render,redirect

# Create your views here.
def login(request):
    if request.method == 'POST':
        username = request.POST.get('username')
        password= request.POST.get('password')
        if username == 'zx' and password == 'zx125':
            old_path = request.GET.get('next')
            if old_path:
                obj = redirect(old_path)
            else:
                obj = redirect('/home')
            request.session['zx'] = 'zx125'
            return obj
    return render(request,'login.html')
from functools import wraps

def login_auth(func):
    @wraps(func)
    def inner(request,*args,**kwargs):
        if request.session.get('zx'):
            res = func(request,*args,**kwargs)
            return res
        else:
            target_url = request.path_info
            print(target_url)
            print(request.get_full_path())
            return redirect(f'/login?next={target_url}')
    return inner

@login_auth
def home(request):
    return render(request,'home.html')
    
def outlogin(request):
    request.session.delete()  # 删除当前会话的所有Session数据

    # request.session.flush()  # 删除当前的会话Session并删除Cookie
    return redirect('/login')

auth实现登录注册

其实原理就是和之前的一样的，只是多了一层封装，但是要对auth模块有一定的了解

auth.authenticate(username=username, password=password)#相当于验证是否存在这个账号密码，有返回对象，没有返回None

auth.login(request,user_obj)#记录这个用户为登录用户，会执行一些session的操作User.objects.create_user(username=username, password=password)#创建一个普通用户

@login_required(login_url='/login/')#封装好的装饰器，功能和上面的是一样的，验证是否登录，没有登录跳转登录界面

from django.shortcuts import render,redirect
from django.contrib.auth.models import User
from django.contrib import auth
from django.contrib.auth.decorators import login_required

# Create your views here.
#登录
def login(request):
    if request.method == 'POST':
        username = request.POST.get('username')
        password= request.POST.get('password')
        user_obj = auth.authenticate(username=username, password=password)
        if user_obj:
            auth.login(request,user_obj)
            old_path = request.GET.get('next')
            if old_path:
                obj = redirect(old_path)
            else:
                obj = redirect('/home')
            request.session['zx'] = 'zx125'
            return obj
    return render(request,'login.html')
#退出
def outlogin(request):
    request.session.delete()  # 删除当前会话的所有Session数据
    return redirect('/login')
#注册
def resgister(request):
    if request.method == 'POST':
        username = request.POST.get('username')
        password = request.POST.get('password')
        User.objects.create_user(username=username, password=password)
        return redirect('/login')
    return render(request,'register.html')

@login_required(login_url='/login/')
def home(request):
    return render(request,'home.html')

高级登录-验证码-表单验证

https://github.com/zx125/all_py_login