ASP.NET IHttpModule IHttpHandler IHttpHandlerFactory 拦截请求

资料来源：网络整理时间：2023/2/14 0:51:34 共计：3600 浏览

先来看看代码，拦截所有Http请求类。下面包含了两种类的集成 IHttpModule IHttpHandlerFactory

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace SoonnetWebSite { /// <summary> /// Handler2 的摘要说明 /// </summary> public class Handler2 : IHttpModule { public void Dispose() { } private void Application_AcquireRequestState(Object source, EventArgs e) { HttpApplication httpApplication = (HttpApplication)source; string url = httpApplication.Context.Request.Path.ToLower(); string imgPhysicalPath = httpApplication.Request.Url.ToString(); if (imgPhysicalPath.ToLower().IndexOf("https") != 0 && imgPhysicalPath.IndexOf("Video/VideoUpload.aspx") == -1 && imgPhysicalPath.IndexOf("Photo/PhotoUpload.aspx") == -1) { imgPhysicalPath = imgPhysicalPath.Replace("http", "https"); httpApplication.Response.Redirect(imgPhysicalPath); return; } // httpApplication.Response.Redirect(imgPhysicalPath); } public void Init(HttpApplication context) { context.AcquireRequestState += (new EventHandler(this.Application_AcquireRequestState)); } //public IHttpHandler GetHandler(HttpContext context, string requestType, string url, string pathTranslated) //{ // IHttpHandler handler = null; // string action = url.Substring(url.LastIndexOf("/", StringComparison.Ordinal) + 1); // action = action.Substring(0, action.IndexOf(".", StringComparison.Ordinal)); // var Rurl = context.Request.RawUrl.Replace("/", "."); // string actionClass = $"SoonnetWebSite.{Rurl}"; // if (true) // { // } //} //public void ReleaseHandler(IHttpHandler handler) //{ // throw new NotImplementedException(); //} } }

下面我们来看看IHttpHandler

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Web; namespace SoonnetWebSite
{ /// <summary> /// Handler1 的摘要说明 /// </summary> public class Handler1 : IHttpHandler
    { private const string DEFAULTIMAGE_URL = "/SGL_Images/Userlogo_Big.jpg"; public void ProcessRequest(HttpContext context)
        { string imgPhysicalPath = context.Request.Url.ToString(); string rawUrl = context.Request.RawUrl.ToString();
            System.Drawing.Image image = null; if (File.Exists(context.Server.MapPath(rawUrl)))
            { //为空 image = System.Drawing.Image.FromFile(context.Server.MapPath(rawUrl));
            } else { //如果图片不存在，放上默认的图片  image = System.Drawing.Image.FromFile(context.Server.MapPath(DEFAULTIMAGE_URL));
            } //设置输出的类型  context.Response.ContentType = "image/jpeg"; //把图片保存到输出流里   image.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
            image.Dispose();
        } public bool IsReusable
        { get { return false;
            }
        }
    }
}

两端代码的配置如下

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 <system.webServer> <security> <requestFiltering> <requestLimits maxAllowedContentLength="1126400000" /> </requestFiltering> </security> <validation validateIntegratedModeConfiguration="false" /> <handlers> <add name="IHttpHandler" verb="GET,POST" path="LokARX.cc" type="SoonnetWebSite.Web_Data.Lok_ARequestX, SoonnetWebSite" /> <add name="IHttpHandler2" verb="GET" path="LokIF.cc" type="SoonnetWebSite.Web_Data.Lok_Interface, SoonnetWebSite" /> <add name="Handler1" verb="*" path="*.jpg" type="SoonnetWebSite.Handler1, SoonnetWebSite" /> </handlers> <modules> <add name="Handler2" type="SoonnetWebSite.Handler2,SoonnetWebSite" /> </modules> </system.webServer>

发现个问题， IIS 配置的跟本机测试的节点不一样。线上的配置要用

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 <system.webServer> <security> <requestFiltering> <requestLimits maxAllowedContentLength="1126400000" /> </requestFiltering> </security> <validation validateIntegratedModeConfiguration="false" /> <HttpHandlers> <add name="IHttpHandler" verb="GET,POST" path="LokARX.cc" type="SoonnetWebSite.Web_Data.Lok_ARequestX, SoonnetWebSite" /> <add name="IHttpHandler2" verb="GET" path="LokIF.cc" type="SoonnetWebSite.Web_Data.Lok_Interface, SoonnetWebSite" /> <add name="Handler1" verb="*" path="*.jpg" type="SoonnetWebSite.Handler1, SoonnetWebSite" /> </HttpHandlers> <HttpModules> <add name="Handler2" type="SoonnetWebSite.Handler2,SoonnetWebSite" /> </HttpModules> </system.webServer>

前面配置多了一个http

是因为IIS 的经典模式跟集成模式的关系，

参考链接：https://blog.csdn.net/hongwei_23/article/details/44300923

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