$.get("/api/v1.0/user",function(resp){

        // 用户未登录

        if ("4101" == resp.errno) {

              location.href = "/login.html";

        }

        // 查询到了用户的信息

        else if ("0"== resp.errno){

            $("#user-name").val(resp.data.name);

            if (resp.data.avatar){

                $("#user-avatar").attr("src",resp.data.avatar);

            }

        }

 },"json");

function getCookie(name) {

    var r = document.cookie.match("\\b" + name + "=([^;]*)\\b");

    return r ? r[1] : undefined;

}

var data = {

       mobile:mobile,

       password:passwd

 };

 $.ajax({

            url:"/api/v1.0/sessions",

            type:"post",

            data:jsonData,

            contentType:"application/json",

            dataType:"json",

            headers:{

                "X-CSRFToken":getCookie("csrf_token")

            },

            success:function (data) {

                if (data.errno=="0"){

                    // 登录成功，跳转到主页

                    location.href ="/"

                } else {

                  // 其他错误信息，在页面中展示

                  $("#password-err span").html(errmsg);

                  $("#password-err").show();

                }

            }

});

        $.ajax({

            url:"/api/v1.0/users/name",

            type:"PUT",

            data:JSON.stringify({name:name}),

            contentType:"application/json",

            dataType:"json",

            headers:{

                "X-CSRFToken":getCookie("csrf_token")

            },

            success: function (data){

                if ("0" == data.errno) {

                    $(".error-msg").hide();

                    showSuccessMsg();

                } else if ("4001" == data.errno) {

                    $(".error-msg").show();

                } else if ("4101" == data.errno) {

                    location.href = "/login.html";

                }

            }

        });

 $.ajax({

        url:"/api/v1.0/sessions",

        type:"delete",

        headers:{

            "X-CSRFToken":getCookie("csrf_token")

        },

        dataType:"json",

        success: function(resp){

            if ("0" == resp.errno){

                location.href = "/index.html";

            }

        }

 });