Block ASP. NET MVC output stream for processing, block HTML text (ASP. NET MVC version)

One previous post has written about a WebForm version of the block HTML output stream, which has recently been used in the same way as MVC.

Such as

Check for a long time and do not know what the reason.

Well, I finally chose to give up.

Recall the previous custom Response.filter, the inside write method can get the information of the page flow.

This time I borrowed the HttpModule implementation to intercept the HTML content output stream, see the code below

First, HtmlHttpModule.cs defines a new class inheritance 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;        Old Stream 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));            Use a custom filter filter} catch (Exception ex) {//write to log here}             #endregion} void _contextapplication_endrequest (object sender, EventArgs e) {#region try {
#region
This is the code that writes the HTML. Now the HTML text is stored in the _content, and the removal process can be

After processing, release the following write
#endregion
                _contextapplication.response.write (_content. ToString ());            }            catch (Exception ex)            {                //write here to log            }            #endregion        } public        void Dispose ()        {            _ Contextapplication = null;            if (_contextapplication! = null)            {                _contextapplication.dispose ()            ;    }}}}

Second, DefaultFilter.cs in module we give Response.filter a custom filter

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 {Stre        Am 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 respon            Sestream.canseek; }} public override bool CanWrite {get {return responsestream.            CanWrite; }} public override long Length {get {return responsestream.le Ngth;            }} 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 (buf        Fer, 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.R Esponse.        contentencoding.getstring (buffer, offset, count)); }    }}

Iii. Web. config The creation is all created, now let it work in MVC.

<system.webServer>    <modules>      <add name= "MONOTPR" type= "Monitor.htmlhttpmodule,monitor"/ >    </modules>  </system.webServer>

Block ASP. NET MVC output stream for processing, block HTML text (ASP. NET MVC version)