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  • 通过http上下文判断是否是Ajax请求

    using System;
    
    namespace System.Web.Mvc
    {
        /// <summary>Represents a class that extends the <see cref="T:System.Web.HttpRequestBase" /> class by adding the ability to determine whether an HTTP request is an AJAX request.</summary>
        public static class AjaxRequestExtensions
        {
            /// <summary>Determines whether the specified HTTP request is an AJAX request.</summary>
            /// <returns>true if the specified HTTP request is an AJAX request; otherwise, false.</returns>
            /// <param name="request">The HTTP request.</param>
            /// <exception cref="T:System.ArgumentNullException">The <paramref name="request" /> parameter is null (Nothing in Visual Basic).</exception>
            public static bool IsAjaxRequest(this HttpRequestBase request)
            {
                if (request == null)
                {
                    throw new ArgumentNullException("request");
                }
                return request["X-Requested-With"] == "XMLHttpRequest" || (request.Headers != null && request.Headers["X-Requested-With"] == "XMLHttpRequest");
            }
        }
    }

    一直不清楚服务端是如何判断一个请求是否是ajax请求,通过ILSpy查看,才得知是通过判断请求头是否存在

    X-Requested-With:XMLHttpRequest  来判断是否是ajax请求。
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  • 原文地址:https://www.cnblogs.com/tangchun/p/9121334.html
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