cookie&session

 

 

 

 设置cookie

def login(request):
    if request.method == "POST":
        user = request.POST.get("user")
        pwd = request.POST.get("pwd")

        user = UserInfo.objects.filter(user=user, pwd=pwd).first()

        if user:
            # 登陆成功
            response = HttpResponse("登录成功!")
            response.set_cookie("is_login", True)   #设置cookie
            # response.set_cookie("is_login",True,max_age=15)
            
            import datetime
            # date=datetime.datetime(year=2019,month=5,day=29,hour=14,minute=34)
            # response.set_cookie("username",user.user,expires=date)
            response.set_cookie("username", user.user, path="/index/")
            return response

    return render(request, "login.html")

读取cookie

def index(request):
    print("index:", request.COOKIES)

    is_login = request.COOKIES.get("is_login")

    if is_login:
        username = request.COOKIES.get("username")

        import datetime

        now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        last_time = request.COOKIES.get("last_visit_time", "")  # 从cookie中取值
        response = render(request, "index.html", {"username": username, "last_time": last_time})
        response.set_cookie("last_visit_time", now)
        return response

    else:
        return redirect("/login/")

设置session

def login_session(request):
    if request.method == "POST":
        user = request.POST.get("user")
        pwd = request.POST.get("pwd")

        user = UserInfo.objects.filter(user=user, pwd=pwd).first()

        if user:
            import datetime

            now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            request.session["is_login"] = True
            request.session["username"] = user.user
            request.session["last_visit_time"] = now

            '''

            if request.COOKIE.get("sessionid"):
                更新

                 在django—session表中创建一条记录:
                   session-key                                     session-data
                   ltv8zy1kh5lxj1if1fcs2pqwodumr45t                  更新数据

            else:

　　　　　　    设置一个session的键值对时(request.session['is_login'] = True)，实际上django进行了以下三个操作 
                1 生成随机字符串   ltv8zy1kh5lxj1if1fcs2pqwodumr45t
                2 response.set_cookie("sessionid",ltv8zy1kh5lxj1if1fcs2pqwodumr45t)
                3 在django—session表中创建一条记录:
                   session-key                                     session-data
                   ltv8zy1kh5lxj1if1fcs2pqwodumr45t       {"is_login":True,"username":"yuan"}

            '''
            return HttpResponse("登录成功!")

    return render(request, "login.html")

 读取session

def index_session(request):
    print("is_login:", request.session.get("is_login"))

    '''

    1  request.COOKIE.get("session")  #  ltv8zy1kh5lxj1if1fcs2pqwodumr45t

    2  django-session表中过滤纪录:

       在django—session表中创建一条记录:
               session-key                                   session-data
               ltv8zy1kh5lxj1if1fcs2pqwodumr45t       {"is_login":True,"username":"yuan"}

       obj=django—session.objects .filter(session-key=ltv8zy1kh5lxj1if1fcs2pqwodumr45t).first()

    3 obj.session-data.get("is_login")
    '''
    is_login = request.session.get("is_login")
    if not is_login:
        return redirect("/login_session/")

    username = request.session.get("username")
    last_visit_time = request.session.get("last_visit_time")

    return render(request, "index.html", {"username": username, "last_visit_time": last_visit_time})

 删除session

del request.session["is_login"]   # 删除session的一个键值对

request.session.flush()   # 删除session

 以下设置在配置文件

SESSION_COOKIE_NAME= "sessionid"                       # Session的cookie保存在浏览器上时的key，即：sessionid＝随机字符串（默认）
SESSION_COOKIE_PATH= "/"                               # Session的cookie保存的路径（默认）
SESSION_COOKIE_AGE = 10                             # Session的cookie失效日期（2周）（默认）
SESSION_EXPIRE_AT_BROWSER_CLOSE = False                # 是否关闭浏览器使得Session过期（默认）
SESSION_SAVE_EVERY_REQUEST = True                     # 是否每次请求都保存Session，默认修改之后才保存（默认）