标签：
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>
拦截asp.net mvc输出流做处理, 拦截HTML文本（asp.net MVC版)
标签：
原文地址：http://www.cnblogs.com/sjns/p/4242056.html
