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C# 跨域请求带cookie

原文：https://blog.csdn.net/z69183787/article/details/78954325

背景：

　　别个的项目，要开发App接口，要求用前端AJAX的方式访问接口数据。

　　后台项目用的asp.net mvc，但是所有的方法都是写在controller层里面的，

　　App接口要求的功能大部分都是controller层里面的方法，

　　肯定不可能再重新写一遍接口咯，时间也来不及，并且方法也会重复，不利于维护。

主要做了两点：

　　1、让后端支持跨域

　　2、跨域时附带把cookie传过去

这里有一个坑，特别注意哈！！！：服务器端 Access-Control-Allow-Credentials = true时，参数Access-Control-Allow-Origin 的值不能为 '*' 。

跨域的代码：

后端：

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

namespace CLBIM.Filter
{
    /// <summary>
    /// 运行跨域
    /// </summary>
    public class AllowCrossSiteJsonAttribute : ActionFilterAttribute
    {
        private string[] _domains;

        public AllowCrossSiteJsonAttribute()
        {
            _domains = new string[] { };
        }
        public AllowCrossSiteJsonAttribute(string domain)
        {
            _domains = new string[] { domain };
        }
        public AllowCrossSiteJsonAttribute(string[] domains)
        {
            _domains = domains;
        }
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            //var context = filterContext.RequestContext.HttpContext;
            //var host = context.Request.UrlReferrer?.Host;
            //if (host != null && _domains.Contains(host))
            //{
            //    filterContext.RequestContext.HttpContext.Response.AddHeader("Access-Control-Allow-Origin", "*");
            //}


            //服务器端 Access-Control-Allow-Credentials = true时，参数Access-Control-Allow-Origin 的值不能为 '*' 。
            var Origin = filterContext.RequestContext.HttpContext.Request.Headers["Origin"];
            filterContext.RequestContext.HttpContext.Response.AddHeader("Access-Control-Allow-Origin", Origin);
            filterContext.RequestContext.HttpContext.Response.AddHeader("Access-Control-Allow-Credentials", "true");
            base.OnActionExecuting(filterContext);
        }
    }
}

View Code

前端：

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <meta charset="utf-8" />
    <style type="text/css">
        input {
            width: 200px;
            margin: 5px;
            height: 30px;
        }
    </style>
    <script src="http://libs.baidu.com/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.bootcss.com/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>
</head>
<body>

    <div id="div1"></div>



    <script type="text/javascript">

        var url = 'http://192.168.2.73:9012';//远程服务地址
        url = 'http://183.66.231.18:8050';



        //带cookie的方式
        //查看返回的数据：F12 -> Network -> XHR -> 点开一个具体的请求 -> Preview

        //登录
        function fn1() {
            var model = {
                UserName: "admin",
                Password: "123456",
            };
            $.ajax({
                type: "POST",
                url: url + "/Login/VerifyLogin",
                data: model,
                dataType: 'json',
                xhrFields: {
                    withCredentials: true
                },
                crossDomain: true,
                success: function (response) {
                    console.log(response);//返回的内容
                }
            });
        }

        //退出登录
        function fn2() {
            $.ajax({
                type: "POST",
                url: url + "/Login/LogOut",
                dataType: 'json',
                xhrFields: {
                    withCredentials: true
                },
                crossDomain: true,
                success: function (response) {
                    console.log(response);
                }
            });
        }

        //获取菜单
        function fn3() {
            $.ajax({
                type: "POST",
                url: url + "/SystemManage/Menu/GetAllMenu",
                dataType: 'json',
                xhrFields: {
                    withCredentials: true
                },
                crossDomain: true,
                success: function (response) {
                    console.log(response);
                }
            });
        }


        
        //生成按钮

        var fn_names = [];
        fn_names.push("带cookie-登录");
        fn_names.push("带cookie-退出登录");
        fn_names.push("带cookie-获取菜单");

        var CreateHtml = function () {
            var strHtml = '';
            for (var i = 0; i < fn_names.length; i++) {
                var num = i + 1;
                var name = fn_names[i];
                strHtml += '<input type="button" value="fn' + num + '  ' + name + '" onclick="fn' + num + '()" />';
            }
            $("#div1").html(strHtml);
        }();


    </script>

</body>
</html>

View Code

注意一下ajax的配置参数：

        function fn1() {
            var model = {
                UserName: "admin",
                Password: "123456",
            };
            $.ajax({
                type: "POST",
                url: url + "/Login/VerifyLogin",
                data: model,
                dataType: 'json',
                xhrFields: {
                    withCredentials: true
                },
                crossDomain: true,
                success: function (response) {
                    console.log(response);//返回的内容
                }
            });
        }

后端主要代码：

 var Origin = filterContext.RequestContext.HttpContext.Request.Headers["Origin"];
 filterContext.RequestContext.HttpContext.Response.AddHeader("Access-Control-Allow-Origin", Origin);
 filterContext.RequestContext.HttpContext.Response.AddHeader("Access-Control-Allow-Credentials", "true");

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原文地址：https://www.cnblogs.com/guxingy/p/10907381.html

C# 跨域 请求带cookie

C# 跨域请求带cookie