输出过滤 Asp.net Response.Filter
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO ;
using System.Text.RegularExpressions;
namespace BasicCompent
{
public class PageResponseFilter:Stream
{
private Stream mSink;
private long mPosition;
Encoding responseCoding;
public PageResponseFilter(Stream sink, Encoding coding)
{
mSink = sink;
responseCoding = coding;
}
public override bool CanRead
{
get { return true; }
}
public override bool CanSeek
{
get { return false; }
}
public override bool CanWrite
{
get { return false; }
}
public override long Length
{
get { return 0; }
}
public override long Position
{
get
{
return mPosition;
}
set
{
mPosition = value;
}
}
public override long Seek(long offset, SeekOrigin origin)
{
return 0;
}
public override void SetLength(long value)
{
mSink.SetLength(value);
}
public override void Close()
{
mSink.Close();
}
public override void Flush()
{
mSink.Flush();
}
public override int Read(byte[] buffer, int offset, int count)
{
return mSink.Read(buffer, offset, count);
}
public override void Write(byte[] buffer, int offset, int count)
{
string pubString = responseCoding.GetString(buffer, offset, count);
int fIndx = pubString.IndexOf("<body>", 0, StringComparison.OrdinalIgnoreCase);
if (fIndx != -1)
{
pubString = pubString.Insert(fIndx + 6, "<!---------测试用的---------//>");
}
byte[] res = responseCoding.GetBytes(pubString);
mSink.Write(res, 0, res.Length);
}
}
}
