.net编程

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C#

HttpUploadHandler.cs：源码内容
							#region License
/*
* SunriseUpload - Asp.net Upload Component
*
* Copyright (C) 2004 mic <mic4free@hotmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
* In case your copy of SunriseUpload does not include a copy of the license, you may find it online at 
* http://www.gnu.org/copyleft/gpl.html
*
* You can find new release of this component at http://athena.9966.org/SunriseUpload .
*/
#endregion
using System;
using System.Text;
using System.Web;
namespace Sunrise.Web.Upload
{
	/// <summary>
	/// 
	/// </summary>
	public class HttpUploadHandler : IHttpHandler
	{
		/// <summary>
		/// Implement from IHttphanders
		/// </summary>
		public bool IsReusable
		{
			get { return true; }
		}
		public HttpUploadHandler()
		{
		}
		/// <summary>
		/// 
		/// </summary>
		/// <param name="uploadGUID"></param>
		public void InitProgress(string uploadGUID)
		{
			HttpContext context;
			UploadStatus uploadStatus = new UploadStatus(uploadGUID);
			//Load progress template into string buffer.
			StringBuilder sb = Utils.GetHtml("Progress.page");
			//While files were uploading, update the state.
			if (uploadStatus.IsActive)
			{
				switch (uploadStatus.State)
				{
					case UploadState.Initializing:
					{
						sb.Replace("${status}$", "初始化...");
						break;
					}
					case UploadState.Uploading:
					{
						sb.Replace("${status}$", "上传中...");
						break;
					}
					case UploadState.Uploaded:
					{
						sb.Replace("${status}$", "上传完成");
						break;
					}
					case UploadState.Moving:
					{
						sb.Replace("${status}$", "移动文件...");
						break;
					}
					case UploadState.Completed:
					{
						sb.Replace("${status}$", "完成");
						break;
					}
				}
				UpdateStatus(uploadStatus, sb, uploadGUID);
			}
			else
			{
				sb.Replace("${Script}$", "<script>window.opener=self;window.close();</script>");
			}
			context = Utils.GetContext();
			//Clear the cache of client browser.
			context.Response.Expires = 0;
			context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
			context.Response.ContentEncoding = Encoding.Default;
			context.Response.ContentType = "text/html";
			context.Response.Clear();
			//Show page to client.
			context.Response.Write(sb.ToString());
		}
		/// <summary>
		/// Update current upload status.
		/// </summary>
		/// <param name="uploadStatus"></param>
		/// <param name="builder"></param>
		/// <param name="uploadGUID"></param>
		private void UpdateStatus(UploadStatus uploadStatus, StringBuilder builder, string uploadGUID)
		{
			if (uploadStatus.State == UploadState.Uploading)
			{
				builder.Replace("${FileName}$", uploadStatus.FileName);
				builder.Replace("${UploadProgress}$", uploadStatus.Percent.ToString());
				builder.Replace("${SurplusProgress}$", Convert.ToString(100 - uploadStatus.Percent));
				builder.Replace("${UploadSpeed}$", (Utils.GetFormatString(uploadStatus.Speed) + "/s"));
				builder.Replace("${LeftTime}$", Utils.GetFormatString(uploadStatus.LeftTime));
				builder.Replace("${BtnOK}$", "disabled");
				builder.Replace("${Refresh}$", ("<meta http-equiv="Refresh" content="1";URL=progress.ashx?UploadID=" + uploadGUID + "">"));
			}
			else if (uploadStatus.State == UploadState.Completed)
			{
				builder.Replace("${UploadProgress}$", uploadStatus.Percent.ToString());
				builder.Replace("${SurplusProgress}$", Convert.ToString(100 - uploadStatus.Percent));
				builder.Replace("${FileName}$", (uploadStatus.FileCount.ToString() + "个文件上传成功！"));
				builder.Replace("${UploadSpeed}$", (Utils.GetFormatString(uploadStatus.Speed) + "/s"));
				builder.Replace("${LeftTime}$", "已完成，无时间剩余");
				uploadStatus.Dispose();
				builder.Replace("${BtnOK}$", "onclick="javascript:window.opener=self;window.close();return false;"");
				builder.Replace("${Refresh}$", "");
			}
			else
			{
				builder.Replace("${FileName}$", "读取中...");
				builder.Replace("${UploadProgress}$", "0");
				builder.Replace("${SurplusProgress}$", "100");
				builder.Replace("${UploadSpeed}$", (Utils.GetFormatString(uploadStatus.Speed) + "/s"));
				builder.Replace("${LeftTime}$", "0 秒");
				builder.Replace("${BtnOK}$", "disabled");
				builder.Replace("${Refresh}$", ("<meta http-equiv="Refresh" content="1";URL=progress.ashx?UploadID=" + uploadGUID + "">"));
			}
			if (uploadStatus.State == UploadState.Completed)
			{
				builder.Replace("${BtnCancel}$", "onclick="javascript:window.opener=self;window.close();return false;"");
			}
			else
			{
				if(Utils.IsAccordantBrowser())
				{
					builder.Replace("${BtnCancel}$", "onclick="javascript:dialogArguments.location.href=dialogArguments.location.href;window.close();"");					
				}
				else
				{
					builder.Replace("${BtnCancel}$", "onclick="javascript:window.opener.opener=null;window.opener.location.href=window.opener.location.href;window.close();this.disabled=true;"");
				}
			}
			builder.Replace("${Script}$", "");
		}
		/// <summary>
		/// 
		/// </summary>
		/// <param name="context"></param>
		public void ProcessRequest(HttpContext context)
		{
			string uploadID = context.Request.QueryString["UploadID"];
			string filePath = context.Request.FilePath;
			filePath = filePath.Substring((filePath.LastIndexOf("/") + 1)).ToUpper();
			bool isUnknownRequest = false;
			if (filePath == "PROGRESS.ASHX")
			{
				this.InitProgress(uploadID);
			}
			else
			{
				isUnknownRequest = true;
			}
			if (isUnknownRequest)
			{
				throw new HttpException(500, "unknown request");
			}
		}
	}
}

						