<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RenameDownload.aspx.cs" Inherits="DownloadProxy.RenameDownload" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <style type="text/css"> body { font-size:12px; } table { background-color:Gray; } td { background-color:White; } </style> <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script> </head> <body> <form id="form1" runat="server"> <asp:scriptmanager runat="server" EnablePageMethods="true"></asp:scriptmanager> <script type="text/javascript"> window.onbeforeunload = function () { return false; }; //PageMethods.set_timeout(5000); PageMethods.set_defaultFailedCallback = "OnFailed"; function OnFailed(ErrorHander) { var ErrorMessage = 'Timeout:' + ErrorHander.get_timedOut() + ',Error Message：' + ErrorHander.get_message(); ErrorMessage = ErrorMessage + ',Exception Type：' + ErrorHander.get_exceptionType() + ',Error Loaction：' + ErrorHander.get_stackTrace(); alert(ErrorMessage); } function DownloadFile() { PageMethods.DownloadFile($("#txtUrl").val(), $("#txtFileName").val(), function (fileHandle) { var task = $("#taskPanel").find(".task:last"); if (fileHandle > 1) { $(task).clone().appendTo($("#taskPanel")); task = $("#taskPanel").find(".task:last"); $(task).find(".taskId").attr("innerHTML", fileHandle); $(task).find(".file").attr("innerHTML", "file"); $(task).find(".size").attr("innerHTML", "size"); $(task).find(".progress").find("#progressBar").css("width", "5%"); $(task).find(".progress").find("#progressLabel").attr("innerHTML", "5%"); $(task).find(".status").attr("innerHTML", "status"); } var interval = setInterval(function () { PageMethods.GetFileDownloadProcess(fileHandle, function (result) { $(task).find(".taskId").attr("innerHTML", result.TaskId); $(task).find(".file").attr("innerHTML", result.FileName); $(task).find(".size").attr("innerHTML", result.FileSize); $(task).find(".progress").find("#progressBar").css("width", result.Progress + "%"); $(task).find(".progress").find("#progressLabel").attr("innerHTML", result.Progress + "%"); $(task).find(".status").attr("innerHTML", result.Status); if (result.Status == 1) { $(task).find(".download").find("a").bind("click", function () { window.open("?path=" + encodeURI(result.FilePath)); }); clearInterval(interval); } }); }, 1000); }); } function fillFileName() { var url = $("#txtUrl").val(); if (url != "") { var fileName = url.substr(url.lastIndexOf('/') + 1); $("#txtFileName").val(fileName); } } </script> <table cellspacing="0" cellpadding="10"> <tr> <td> <table id="downloadPanel" cellspacing="1" cellpadding="5" width="600px"> <tr> <td width="100px">Url:</td> <td width="400px"> <textarea id="txtUrl" cols="0" rows="5" style="400px;margin:5px;text-align:left;vertical-align:top;" onchange="fillFileName()">https://download.alipay.com/sec/edit/aliedit.exe</textarea> </td> <td width="100" valign="bottom" align="center" rowspan="2"> <input type="button" value="download" runat="server" id="btnDownload" onclick="DownloadFile()" /> </td> </tr> <tr> <td>File Name:</td> <td><input style="400px;" type="text" id="txtFileName" size="25" value="aliedit.exe" /></td> </tr> </table> </td> </tr> <tr> <td> </td> </tr> <tr> <td> <table id="taskPanel" style="background-color:gray" cellpadding="5" cellspacing="1"> <tr> <td style="100px;text-align:center;">TaskID</td> <td style="100px;text-align:left;">File</td> <td style="100px;text-align:left;">Size</td> <td style="200px;text-align:left;">Progress</td> <td style="100px;text-align:left;">Status</td> <td style="100px;text-align:left;">Download</td> </tr> <tr class="task"> <td style="100px;text-align:center;" class="taskId"> </td> <td style="100px;text-align:left;" class="file"> </td> <td style="100px;text-align:left;" class="size"> </td> <td style="200px;text-align:left;" class="progress"> <table cellpadding="0" cellspacing="0"> <tr> <td style="175px;"> <div style="height:10px;173px;border:1px solid gray;margin:0px;padding:0px;"> <div id="progressBar" style="height:100%;0%;margin:0px;padding:0px;background-color:Gray;"></div> </div> </td> <td style="25px;text-align:center;" id="progressLabel"> 0% </td> </tr> </table> </td> <td style="100px;text-align:left;" class="status"> </td> <td style="100px;text-align:left;" class="download"><a href="#">download</a></td> </tr> </table> </td> </tr> </table> </form> </body> </html>
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Net; using System.IO; using System.Threading; using System.Configuration; namespace DownloadProxy { public class Task { public int TaskId { get; set; } public string Url { get; set; } public string FilePath { get; set; } public string FileName { get { return new FileInfo(FilePath).Name; } } public long FileSize { get; set; } public int Progress { get; set; } public int Status { get; set; } } public partial class RenameDownload : System.Web.UI.Page { public static Dictionary<int,Task> FilesDownloadProcess { get; set; } protected void Page_Load(object sender, EventArgs e) { if (!string.IsNullOrEmpty(Request.QueryString["path"])) { var path = Request.QueryString["path"]; if (!System.IO.File.Exists(path)) { Response.End(); return; } OutPutFile(path); } if (!IsPostBack) { FilesDownloadProcess = new Dictionary<int, Task>(); } } [System.Web.Services.WebMethod] public static int DownloadFile(String remoteFilename, String localFilename) { var fileHand = FilesDownloadProcess.Count + 1; var baseFileName = string.Empty; var fileExtension = string.Empty; var downloadPath = ConfigurationManager.AppSettings["downloadPath"]; if (localFilename.Trim() == string.Empty) { baseFileName = "001"; fileExtension = ""; } else { try { var fileInfo = new FileInfo(localFilename); fileExtension = fileInfo.Extension; baseFileName = fileInfo.Name.Substring(0, fileInfo.Name.Length - fileExtension.Length); } catch (Exception) { //throw; } } var filePath = string.Format(@"{0}\{1}", downloadPath, localFilename); for (var i = 1; System.IO.File.Exists(filePath); i++) { filePath = string.Format(@"{0}\{1}({2}){3}", downloadPath, baseFileName, i, fileExtension); } localFilename = filePath; var task = new Task { TaskId = fileHand , Url = remoteFilename , FilePath = localFilename , FileSize = 0 , Progress = 0 , Status = 0 }; FilesDownloadProcess.Add(task.TaskId, task); var thread = new Thread(new ThreadStart(delegate() { DownloadFileProc(task.Url, task.FilePath, task.TaskId); })); thread.Start(); return fileHand; } public static long DownloadFileProc(String remoteFilename, String localFilename,int taskId) { long bytesProcessed = 0; Stream remoteStream = null; Stream localStream = null; WebResponse response = null; try { // Create a request for the specified remote file name var request = (HttpWebRequest)WebRequest.Create(remoteFilename); request.AllowWriteStreamBuffering = true; request.Credentials = System.Net.CredentialCache.DefaultCredentials; request.Proxy = new WebProxy { UseDefaultCredentials = true }; request.MaximumResponseHeadersLength = -1; request.Accept = "www/source, text/html, video/mpeg, image/jpeg, image/x-tiff, image/x-rgb, image/x-xbm, image/gif, application/postscript, application/x-gzip, */*, "; request.AllowAutoRedirect = true; request.UserAgent = "TLE Retriever v1.5.8"; request.ContentType = "application/x-www-form-urlencoded"; request.Method = "GET"; request.Headers.Add("Accept-Language", "zh-cn"); request.Headers.Add("Accept-Encoding", "gzip,deflate"); request.KeepAlive = true; if (request != null) { response = request.GetResponse(); FilesDownloadProcess[taskId].FileSize = response.ContentLength; if (response != null) { remoteStream = response.GetResponseStream(); // Create the local file localStream = File.Create(localFilename); // Allocate a 1k buffer byte[] buffer = new byte[1024]; int bytesRead; // Simple do/while loop to read from stream until // no bytes are returned do { // Read data (up to 1k) from the stream bytesRead = remoteStream.Read(buffer, 0, buffer.Length); // Write the data to the local file localStream.Write(buffer, 0, bytesRead); // Increment total bytes processed bytesProcessed += bytesRead; FilesDownloadProcess[taskId].Progress = (int)(((double)bytesProcessed / (double)FilesDownloadProcess[taskId].FileSize) * 100); if (FilesDownloadProcess[taskId].Progress >= 100) { FilesDownloadProcess[taskId].Status = 1; } } while (bytesRead > 0); } } } catch { //throw; } finally { if (response != null) response.Close(); if (remoteStream != null) remoteStream.Close(); if (localStream != null) localStream.Close(); } // Return total bytes processed to caller. return bytesProcessed; } public void OutPutFile(string filePath) { System.IO.Stream iStream = null; // Buffer to read 10K bytes in chunk: byte[] buffer = new Byte[10000]; // Length of the file: int length; // Total bytes to read: long dataToRead; // Identify the file name. string filename = System.IO.Path.GetFileName(filePath); try { // Open the file. iStream = new System.IO.FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read); // Total bytes to read: dataToRead = iStream.Length; Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename=" + filename); // Read the bytes. while (dataToRead > 0) { // Verify that the client is connected. if (Response.IsClientConnected) { // Read the data in buffer. length = iStream.Read(buffer, 0, 10000); // Write the data to the current output stream. Response.OutputStream.Write(buffer, 0, length); // Flush the data to the HTML output. Response.Flush(); buffer = new Byte[10000]; dataToRead = dataToRead - length; } else { //prevent infinite loop if user disconnects dataToRead = -1; } } } catch (Exception ex) { // Trap the error, if any. Response.Write("Error : " + ex.Message); } finally { if (iStream != null) { //Close the file. iStream.Close(); } } } [System.Web.Services.WebMethod] public static Task GetFileDownloadProcess(int fileHandle) { return FilesDownloadProcess[fileHandle]; } } }
