cookie和session

A cookie is data stored on the client (browser)

1. Get cookies

request.COOKIES.get('key') get形式

request.COOKIES['key'] dictionary form

request.get_signed_cookie('key',salt='sdasdas') encrypted form salt is encrypted salt

def cook1(request): #Get
     the currently logged in user 

    v =request.COOKIES.get( ' username_cookie ' )    #Get cookies 
 #Or v=request.COOKIES['username_cookie'] #Get cookies 
    try :
        v=request.get_signed_cookie('username_cookie',default=RAISE_ERROR，salt='sdasdas')   #获取加密cookie

        print(v)
        if not v:
            return redirect('/xiaoqing/cookie')


        else:
            return render(request,'cookie1.html',{'current_user':v,})

    except Exception as e:
        return redirect('/xiaoqing/cookie')

参数：default: default value

salt: encrypted salt

max_age: background control expiration time

2. Setting cookies

def cook(request):

    err_msg=""
    if request.method == "GET":
        return render(request,'cookie.html')

    if request.method == "POST":

        username = request.POST.get('username')
        p = request.POST.get('password')

        dic = user_info.get(username)
        print(dic)

        if not dic:
            err_msg = " User does not exist " 
            return render(request, ' cookie.html ' ,{ ' err_msg ' :err_msg})

        if dic['pwd'] == int(p):

            res = redirect( ' /xiaoqing/cookie1 ' )
             # res.set_cookie('username_cookie',username) #Set cookie to close the browser to invalidate 
            # res.set_cookie('username_cookie',username,max_age=10) Set the cookie expiration time to 10 seconds expire 
            import datetime
            current_date=datetime.datetime.utcnow()
            change_date=current_date+datetime.timedelta(seconds=5)
            res.set_cookie( ' username_cookie ' ,username,expires=change_date) #When    will it expire

            # res.set_signed_cookie('username_cookie',username,salt='sdasdas')

            return res
        else:
            return render(request,'cookie.html')

rep.set_signed_cookie(key,value,salt='encrypted salt' ,...)

    parameter:

        key,

        value='' , value

        max_age= None, timeout

        expires=None, expiration timeout (IE requires expires, so set it if hasn't been already.)
 path='/', the path where the cookie takes effect, / represents the root path, special: the cookie with the path can be accessed by any url page
 domain= None, the domain name where the cookie takes effect secure= False, https transmission httponly=False can only be transmitted by the http protocol and cannot be obtained by JavaScript (not absolute, the underlying packet capture can be obtained or overwritten)

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