ajax

<form>
    用户名 <input type="text" id="user">
    密码 <input type="password" id="pwd">
    <input type="button" value="submit" class="login_btn"><span class="error"></span>
</form>

<script>
 // 登录验证
    $(".login_btn").click(function () {
        $.ajax({
            url: "/login/",type: "post",data: {
                "user": $("#user").val(),"pwd": $("#pwd").val(),},success: function (data) {
                console.log(data); // json字符串
                console.log(typeof data);
                var data = JSON.parse(data);// 反序列化 object {},数据转换

                console.log(data); // object
                console.log(typeof data);

                if (data.user) {

                    console.log(key);
                    location.href = "http://www.baidu.com/";
                }
                else {
                    $(".error").html(data.msg).css({"color": "red","margin-left": "10px"})
                }
            }
        })

    })

</script>

def login(request):

    print(request.POST)
    user=request.POST.get("user")
    pwd=request.POST.get("pwd")

    user=User.objects.filter(name=user,pwd=pwd).first()

    res={"user":None,"msg":None}  #字典
    if user:
        res["user"]=user.name
    else:
        res["msg"]="username or passwor wrong! "

    import json
    # 转换成json ，传送数据
    return HttpResponse(json.dumps(res))