ASP.NET IHttpModule IHttpHandler IHttpHandlerFactory 拦截请求

喜欢ヅ旅行 2023-10-11 11:13 6阅读 0赞

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

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

<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

<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

http 转 https 参考链接：https://blog.csdn.net/suxuelian/article/details/80103514

转载于:https://www.cnblogs.com/Mrly/p/11497671.html