HttpModule 实现 ASP.Net (*.aspx) 中文简繁体的自动转换,不用修改原有的任何代码,直接部署即可!

从8月份忙到现在还没忙完,还得再坚持几个月!
一直没时间更新blog,今天收到一封回复我以前的一篇blog的邮件,提醒了我!
http://Microshaoft.cnblogs.com/archive/2005/03/22/123365.aspx#288944
于是根据该网友的建议:
用 HttpModule 实现了 ASP.Net (*.aspx) 中文简繁体的自动转换!
思路相当简单!
Global.asax 的 Codebehind 的 Application_BeginRequest 的事件处理函数也应可以实现!
HttpHandler 是不能实现的,因为它是"截流"!


效果不错!可以处理任意 ASP.Net 站点、虚拟目录!不用修改原有的任何代码!
代码如下:
StrConvHttpModule.cs
/*
csc.exe /t:library StrConvHttpModule.cs /r:C:\windows\Microsoft.NET\Framework\v1.1.4322\Microsoft.VisualBasic.dll 
*/

namespace Microshaoft.HttpModules
{
    
using System;
    
using System.Web; 
    
using System.Collections;

    
using Microshaoft.IO;

    
public class StrConvHttpModule : IHttpModule
    
{
        
public string ModuleName
        
{
            
get
            
{
                
return "StrConvHttpModule";
            }

        }


        
public void Init(HttpApplication application)
        
{
            application.BeginRequest 
+= (new EventHandler(this.Application_BeginRequest));
        }

        
        
private void Application_BeginRequest(object sender, EventArgs e)
        
{
            HttpApplication application 
= (HttpApplication) sender;
            HttpContext context 
= application.Context;
            context.Response.Filter 
= new StrConvFilterStream(context.Response.Filter);
        }


        
public void Dispose()
        
{
        }

    }

}


namespace Microshaoft.IO
{
    
using System;
    
using System.IO;
    
using System.Web;
    
using System.Text;
    
using System.Globalization;

    
using Microsoft.VisualBasic;

    
public class StrConvFilterStream : Stream
    
{
        
private Stream _sink;
        
private long _position;

        
public StrConvFilterStream(Stream sink)
        
{
            
this._sink = sink;
        }


        
public override bool CanRead
        
{
            
get
            
{
                
return true;
            }

        }


        
public override bool CanSeek
        
{
            
get
            
{
                
return true;
            }

        }


        
public override bool CanWrite
        
{
            
get
            
{
                
return true;
            }

        }


        
public override long Length
        
{
            
get
            
{
                
return 0;
            }

        }


        
public override long Position
        
{
            
get
            
{
                
return this._position;
            }

        
set
            
{
                
this._position = value;
            }

        }


        
public override long Seek(long offset, SeekOrigin direction)
        
{
            
return this._sink.Seek(offset, direction);
        }


        
public override void SetLength(long length)
        
{
            
this._sink.SetLength(length);
        }


        
public override void Close()
        
{
            
this._sink.Close();
        }


        
public override void Flush()
        
{
            
this._sink.Flush();
        }


        
public override int Read(byte[] buffer, int offset, int count)
        
{
            
return this._sink.Read(buffer, offset, count);
        }


        
public override void Write(byte[] buffer, int offset, int count)
        
{
            
if (HttpContext.Current.Response.ContentType == "text/html")
            
{
                Encoding e 
= Encoding.GetEncoding(HttpContext.Current.Response.Charset);
                
string s = e.GetString(buffer, offset, count);
                s 
= Strings.StrConv(s, VbStrConv.TraditionalChinese, CultureInfo.CurrentCulture.LCID);
                
this._sink.Write(e.GetBytes(s), 0, e.GetByteCount(s));
            }

            
else
            
{
                
this._sink.Write(buffer, offset, count);
            }

        }

    }

}

将 StrConvHttpModule.cs 编译为 StrConvHttpModule.dll:
csc.exe /t:library StrConvHttpModule.cs /r:C:\windows\Microsoft.NET\Framework\v1.1.4322\Microsoft.VisualBasic.dll

以 Microsoft .NET Framework SDK 自带的  QuickStart 教程站点为例
http://localhost/quickstart/
修改 quickstart 虚拟目录下的 web.config, 在 <system.web>...</system.web> 区域添加如下配置节:

    <httpModules>
        
<add name="StrConvHttpModule" type="Microshaoft.HttpModules.StrConvHttpModule, StrConvHttpModule" />
    
</httpModules>


将 StrConvHttpModule.dll 复制到 该虚拟目录的 bin\ 目录下
,以及该虚拟目录下的各级子虚拟目录下的 bin\ 目录下

收功!

posted @ 2005-12-03 00:27 Microshaoft 阅读(...) 评论(...) 编辑 收藏