httpmodules是http管道处理程序 可以重写接口进行一些在请求到达api接口前做全局处理
这是一个过滤关键词的例子
using System;using System.Collections.Generic;using System.Collections.Specialized;using System.Linq;using System.Reflection;using System.Web;namespace WebApplication4{ ???public class FilterForbiddenWordModule:IHttpModule ???{ ???????void IHttpModule.Dispose() { } ???????void IHttpModule.Init(HttpApplication context) ???????{ ???????????context.BeginRequest += new EventHandler(OnBeginRequest); ???????} ???????private static void OnBeginRequest(object sender, EventArgs e) ???????{ ???????????var request = (sender as HttpApplication).Request; ???????????ProcessCollection(request.QueryString); ???????????ProcessCollection(request.Form); ???????} ???????private static void ProcessCollection(NameValueCollection collection) ???????{ ???????????var copy = new NameValueCollection(); ????????// ??copy.GetType().GetProperty("IsReadOnly").SetValue(copy, false); ???????????foreach (string key in collection.AllKeys) ???????????{ ???????????????Array.ForEach( ???????????????????collection.GetValues(key), ???????????????????v => copy.Add(key, ForbiddenWord.Filter(v))); ???????????} ???????????typeof(NameObjectCollectionBase).GetProperty("IsReadOnly",BindingFlags.Instance | BindingFlags.NonPublic).SetValue(collection, false); ???????????collection.Clear(); ???????????collection.Add(copy); ???????} ???} ???public static class ForbiddenWord ???{ ???????public static string Filter(string original) ???????{ ???????????return original.Replace("关键词", "替换后"); ???????} ???}}配置文件加入该项配置 web程序启动后会执行可以注册多个 这是影响全局的配置
使用httpModules做一些事
原文地址：http://www.cnblogs.com/ProDoctor/p/7586463.html