avatarhttphandler.cs

本系统是在asp版《在线文件管理器》的基础上设计制作

//------------------------------------------------------------------------------
// <copyright company="Telligent Systems">
//     Copyright (c) Telligent Systems Corporation.  All rights reserved.
// </copyright> 
//------------------------------------------------------------------------------

// 修改说明：如果头像保存在磁盘，则直接显示磁盘上的图片
// 修改人：宝玉
// 修改日期：2005-06-13

using System;
using System.Web;
using System.Web.Caching;
using CommunityServer;
using CommunityServer.Configuration;

namespace CommunityServer.Components.HttpHandler {

    public class AvatarHttpHandler : IHttpHandler {

        public void ProcessRequest (HttpContext context) {

            try {
				Avatar userAvatar = Resources.GetAvatar( int.Parse(context.Request.QueryString["UserID"]) );
				
				// 如果是保存在磁盘上
				//
				if (userAvatar.ImageID == 0)
				{
					context.Response.Redirect( CSConfiguration.GetConfig().AvatarsPath + userAvatar.FileName, true);
				}

                context.Response.ContentType = userAvatar.ContentType;
                context.Response.OutputStream.Write(userAvatar.Content, 0, userAvatar.Length);

                context.Response.Cache.SetCacheability(HttpCacheability.Public);
                // Terry Denham 7/16/2004
				// changing default cache for avatars from 1 day to 30 minutes
				context.Response.Cache.SetExpires(DateTime.Now.AddMinutes(30));
                context.Response.Cache.SetAllowResponseInBrowserHistory(true);
                context.Response.Cache.SetValidUntilExpires(true);
                context.Response.Cache.VaryByParams["UserID"] = true;
            } catch {}

        }

        public bool IsReusable {
            get {
                return false;
            }
        }
    }
}