拦截asp.net mvc输出流做处理, 拦截HTML文本(asp.net MVC版)
以前的一个贴子写过一个webForm的拦截HTML输出流的版本,最近用到mvc时用同样的方式发生一些问题。
如下图
查了好久也不知道啥原因。
好吧, 我最后选择放弃。
想起以前自定义Response.Filter 时,里面Write方法可以获取页面流的信息。
这次我借用HttpModule实现拦截HTML内容输出流,下面看代码
一、HtmlHttpModule.cs 定义一个新类继承HttpModule
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Reflection; using System.Text; using System.Threading.Tasks; using System.Web; namespace Monitor { public class HtmlHttpModule : IHttpModule { private HttpApplication _contextApplication; private TextWriter tw_old; // 旧流 private StringBuilder _content; private FieldInfo tw_field; public void Init(HttpApplication application) { _contextApplication = application; _contextApplication.BeginRequest += new EventHandler(_contextApplication_BeginRequest); _contextApplication.EndRequest += new EventHandler(_contextApplication_EndRequest); } void _contextApplication_BeginRequest(object sender, EventArgs e) { #region try { _content = new StringBuilder(); _contextApplication.Response.Filter = new DefaultFilter(_contextApplication.Response.Filter, o => _content.Append(o)); //用自定义的Filter筛选器 } catch (Exception ex) { //这里写入日志 } #endregion } void _contextApplication_EndRequest(object sender, EventArgs e) { #region try {
#region
//这里就是写处理HTML的代码了。现在HTML的文本保存在_content中,取出处理就可以
//处理完放出下面的Write中
#endregion
_contextApplication.Response.Write(_content.ToString()); } catch (Exception ex) { //这里写入日志 } #endregion } public void Dispose() { _contextApplication = null; if (_contextApplication != null) { _contextApplication.Dispose(); } } } }
二、DefaultFilter.cs 在module中我们给Response.Filter 自定义的筛选器
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Text.RegularExpressions; using System.Web; namespace Monitor { public class DefaultFilter : Stream { Stream responseStream; long position; Action<String> action; public DefaultFilter(Stream inputStream,Action<String> act) { action = act; responseStream = inputStream; } public override bool CanRead { get { return responseStream.CanRead; } } public override bool CanSeek { get { return responseStream.CanSeek; } } public override bool CanWrite { get { return responseStream.CanWrite; } } public override long Length { get { return responseStream.Length; } } public override long Position { get { return position; } set { position = value; } } public override void Flush() { responseStream.Flush(); } public override int Read(byte[] buffer, int offset, int count) { return responseStream.Read(buffer, offset, count); } public override long Seek(long offset, SeekOrigin origin) { return responseStream.Seek(offset, origin); } public override void SetLength(long value) { responseStream.SetLength(value); } public override void Write(byte[] buffer, int offset, int count) { action(HttpContext.Current.Response.ContentEncoding.GetString(buffer, offset, count)); } } }
三、web.config 该创建都创建好了,现在就让它在mvc中起作用吧
<system.webServer> <modules> <add name="Monotpr" type="Monitor.HtmlHttpModule,Monitor"/> </modules> </system.webServer>
郑重声明:本站内容如果来自互联网及其他传播媒体,其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点和对其真实性负责,也不构成任何其他建议。