1：Home/index.cshtml下面的Html程式碼

<div>
        <input  value="1點選先登陸" type="button" id="btnLogin"/><br />
        <input value="2再點選授權後呼叫介面" type="button" id="btnAuthenrazation" /><br />
 </div>

2：Home/index 下面的HomeController

[skipLogAttribute]
public ActionResult Index()
{
return View();
}

3: Ajax的模擬程式碼，先登入，後獲取授權，再帶上Ticket，後臺過濾器校驗ok雜可以請求對應的介面

<script type="text/javascript">
$(function () {
var ticket = "";
$("#btnLogin").click(function () { //---登陸的操作
$.ajax({
url: "http://localhost:8899/api/values",
data: { "uid": "zrf", "pwd": "123" },
type: "get",
success: function (res) {
if (res.result) {
ticket = res.ticket;
alert("授權成功"+res.ticket);
}
},
dataType:"json"
})
});

//----拿到了Ticket(後臺過濾器會判斷是否有過授權，以及授權ok才可以呼叫對應的介面)
$("#btnAuthenrazation").click(function () {
$.ajax({
url: "http://localhost:8899/api/values",
data: { },
type: "get",
beforeSend: function (xhr) {
xhr.setRequestHeader('Authorization', 'BasicAuth ' + ticket);//--請求其他的介面都需要帶上Ticket的
},
success: function (res) {
alert("ok")
}
})
});
})

//帶上Ticket來訪問WebApi介面
$("#btnWithTicket").click(function () {
$.ajax({
url: "http://localhost:8899/api/values",
data: {"id":110},
type: "get",
beforeSend: function (xhr) {
xhr.setRequestHeader('Authorization', 'BasicAuth ' + ticket);//--請求其他的介面都需要帶上Ticket的
},
success: function (res) {
if (res.result) {
alert("呼叫成功" + res.data);
}
}
})
})

4: 建立的一個測試的 WebApiController 如ValuesController:ApiController

namespace WebApplication1.Controllers
{
using System.Web.Security;
using WebApplication1.Filters;
public class ValuesController : ApiController
{

[HttpGet]
[skipLog]
public dynamic Login(string uid, string pwd)
{
dynamic result = null;
if ("zrf".Equals(uid) && pwd.Equals("123"))
{
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, "account", DateTime.Now, DateTime.Now.AddSeconds(10), true, $"uid={uid},pwd={pwd}");
result = new { result = true, ticket = FormsAuthentication.Encrypt(ticket) };
}
else {
result = new { result = false, ticket = ""};
}
return result;
}
// GET api/<controller>
[skipLogAttribute]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
// GET api/<controller>/5
[CustomerAuthenrazationFilter]
public dynamic Get(int id)
{
return new { result = true, id = id };
}
}
}

5:授權過濾器：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication1.Filters
{
    using System.Net.Http.Headers;
    using System.Web.Http.Controllers;
    using System.Web.Http.Filters;
    using System.Web.Security;
    using System.Web.Http;
    using System.Net;

    public class CustomerAuthenrazationFilterAttribute : AuthorizationFilterAttribute
    {
        public override void OnAuthorization(HttpActionContext actionContext)
        {
            skipLogAttribute skiplogin = actionContext.ActionDescriptor.GetCustomAttributes<skipLogAttribute>().FirstOrDefault();
            if (skiplogin!=null)
            {
                return;
            }
        
            AuthenticationHeaderValue headevalue = actionContext.Request.Headers.Authorization;
            if (headevalue != null)
            {
                string Msg = string.Empty;
                if (ValidateTicket(headevalue.Parameter,out Msg))
                {
                    return;
                }
                else
                {
                    this.HandlerUnAuthorization(Msg);
                }
            }
            else {
                this.HandlerUnAuthorization("請先獲取登陸授權的Ticket");
            }
        }
        private void HandlerUnAuthorization(string Msg)
        {
            throw new Exception(Msg);
        }

        private bool ValidateTicket(string parameter,out string Msg)
        {
            Msg = string.Empty;
            if (!string.IsNullOrWhiteSpace(parameter))
            {
                FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(parameter);
                if (ticket != null)
                {
                    if (ticket.Expired)
                    {
                        Msg = "介面時間已經過期，請重新登陸授權！";
                        return false;
                    }
                    if (string.Equals($"uid=zrf,pwd=123", ticket.UserData))// $"uid={accountID},pwd={pwd}"
                    {
                        Msg = "授權成功！";
                        return true;
                    }
                    else {
                        Msg = "授權失敗，請重新登陸授權！";
                        return false;
                    }
                }
            }
            return false;
        }
    }
}

6：自定義的特性，用來跳過許可權的驗證

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication1.Filters
{
public class skipLogAttribute:Attribute
{
}
}

 7：在WebApiConfig 檔案中來註冊一個全域性的授權過濾器

namespace WebApplication1.App_Start
{
using System.Web.Mvc;
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API 配置和服務

// Web API 路由
config.MapHttpAttributeRoutes();
config.Filters.Add(new Filters.CustomerAuthenrazationFilterAttribute());
}
}
}

8：最後上兩張測試的截圖：　

最後，這個案例只是起到拋磚引玉的作用，大家還可以做得更加的細緻及合理

如下：

我們還可以加上隨機字串:A;

時間戳:B(時間精確到秒，方便後續判斷，可過期);

唯一的uid C;

pwd D（根據uid來查詢資料庫並獲取到pwd）,;

獲取自定義的簽名Sign:（如：uid+A+B+C+D 這4個值再MD5一下，防篡改），這樣就和微信那套機制就差不多了！ 嘻嘻！

規則我們自己來定，歡迎大家提出有建議性的回覆，謝謝