关于Aspx页面优化的几种方法
Http压缩
1、在项目里面新建一个CompressionModule.cs类，命名空间CanYou。
#region Using
using System;
using System.Net;
using System.Web;
using System.Web.Caching;
using System.IO;
using System.IO.Compression;
#endregion
namespace CanYou
{
///<summary>
/// Compresses the output using standard gzip/deflate.
///</summary>
public sealed class CompressionModule : IHttpModule
{
#region IHttpModule Members
///<summary>
/// Disposes of the resources (other than memory) used by the module
/// that implements <see cref="T:System.Web.IHttpModule"></see>.
///</summary>
void IHttpModule.Dispose()
{
// Nothing to dispose;
}
///<summary>
/// Initializes a module and prepares it to handle requests.
///</summary>
///<param name="context">An <see cref="T:System.Web.HttpApplication"></see>
/// that provides access to the methods, properties, and events common to
/// all application objects within an ASP.NET application.
///</param>
void IHttpModule.Init(HttpApplication context)
{
context.PreRequestHandlerExecute += new EventHandler(context_PostReleaseRequestState);
}
#endregion
private const string GZIP = "gzip";
private const string DEFLATE = "deflate";
#region Compress page
///<summary>
/// Handles the BeginRequest event of the context control.
///</summary>
///<param name="sender">The source of the event.</param>
///<param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
void context_PostReleaseRequestState(object sender, EventArgs e)
{
HttpApplication app = (HttpApplication)sender;
if (app.Context.CurrentHandler is System.Web.UI.Page && app.Request["HTTP_X_MICROSOFTAJAX"] == null)
{
if (IsEncodingAccepted(DEFLATE))
{
app.Response.Filter = new DeflateStream(app.Response.Filter, CompressionMode.Compress);
SetEncoding(DEFLATE);
}
else if (IsEncodingAccepted(GZIP))
{
app.Response.Filter = new GZipStream(app.Response.Filter, CompressionMode.Compress);
SetEncoding(GZIP);
}
}
}
///<summary>
/// Checks the request headers to see if the specified
/// encoding is accepted by the client.
///</summary>
private static bool IsEncodingAccepted(string encoding)
{
HttpContext context = HttpContext.Current;
return context.Request.Headers["Accept-encoding"] != null && context.Request.Headers["Accept-encoding"].Contains(encoding);
}
///<summary>
/// Adds the specified encoding to the response headers.
///</summary>
///<param name="encoding"></param>
private static void SetEncoding(string encoding)
{
HttpContext.Current.Response.AppendHeader("Content-encoding", encoding);
}
#endregion
}
}
2、按如下增加及修改项目的web.config
<system.web>
<httpModules>
<add name="CompressionModule" type="CanYou.CompressionModule"/>
</httpModules>
</system.web>
相关文章：
Ⅰ、页面压缩的使用
Ⅲ、控件缓存