public void ProcessRequest(HttpContext context)
{
// Accepting user request
// reading the query
var fileNameQuery = context.Request.QueryString["file"];
// validating the request
if (string.IsNullOrEmpty(fileNameQuery))
{
InvalidRequest(context, "Invalid request! Specify file name in url e.g.: ResumableDownload.ashx?file=sample.zip");
return;
}
// the physical file address path
var fileName = context.Server.MapPath(fileNameQuery);
if (!File.Exists(fileName))
{
InvalidRequest(context, "File does not exists!");
return;
}
// reading file info
var fileInfo = new FileInfo(fileName);
var fileLength = fileInfo.Length;
// Download information class
var downloadInfo = new DownloadDataInfo(fileName);
// Reading request download range
var requestedRanges = HeadersParser.ParseHttpRequestHeaderMultipleRange(context.Request, fileLength);
// apply the ranges to the download info
downloadInfo.InitializeRanges(requestedRanges);
string etagMatched;
int outcomeStausCode = 200;
// validating the ranges specified
if (!HeadersParser.ValidatePartialRequest(context.Request, downloadInfo, out etagMatched, ref outcomeStausCode))
{
// the request is invalid, this is the invalid code
context.Response.StatusCode = outcomeStausCode;
// show to the client what is the real ETag
if (!string.IsNullOrEmpty(etagMatched))
{
context.Response.AppendHeader("ETag", etagMatched);
}
// stop the preoccess
// but don't hassle with error messages
return;
}
// user ID, or IP or anything you use to identify the user
var userIP = context.Request.UserHostAddress;
// limiting the download speed manager and the speed limit
UserSpeedLimitManager.StartNewDownload(downloadInfo, userIP, DownloadLimit);
// It is very important to destory the DownloadProcess object
// Here the using block does it for us.
using (var process = new DownloadProcess(downloadInfo))
{
// start the download
var state = process.ProcessDownload(context.Response);
// checking the state of the download
if (state == DownloadProcess.DownloadProcessState.PartFinished)
{
// all parts of download are finish, do something here!
}
}
}
public void ProcessRequest(HttpContext context)
{
var request = context.Request;
var response = context.Response;
// Accepting user request
var idStr = request.QueryString["id"];
try
{
int id;
if (!int.TryParse(idStr, out id))
{
InvalidRequest(context, "Invalid request!");
return;
}
UploadedFile uploadedFile;
using (var db = new UploadDb())
{
db.Configuration.AutoDetectChangesEnabled = false;
db.Configuration.ProxyCreationEnabled = false;
var file = db.Files.FirstOrDefault(a => a.UploadedFileID == id);
if (file == null)
{
InvalidRequest(context, "File does not exists!");
response.StatusCode = 404;
return;
}
uploadedFile = file;
}
//SiteException.LogException(new Exception(
// string.Format("UploadedFileID:{0}, IsPublic:{1}, UploadDate:{2}, Filename:{3}",
// uploadedFile.UploadedFileID,
// uploadedFile.IsPublic,
// uploadedFile.UploadDate,
// uploadedFile.Filename)));
if (uploadedFile.IsPublic == false)
{
// check the owner
var user = UserManager.GetUser();
if (user == null)
{
var succeed = UserManager.BasicAuthorize(context);
if (!succeed)
{
return;
}
user = UserManager.GetUser();
}
// not the file owner!
if (user == null || user.UserID != uploadedFile.UserId)
{
context.Response.Clear();
context.Response.Write("You do not have access to download this file!");
context.Response.StatusCode = (int)HttpStatusCode.Forbidden;
context.Response.Flush();
context.Response.End();
return;
}
}
// file path
var fileName = UploadedFileManager.MapToPhysicalPath(uploadedFile);
// reading file info
var fileInfo = new FileInfo(fileName);
var fileLength = fileInfo.Length;
// Download information class
using (var downloadInfo = new DownloadDataInfo(fileName))
{
downloadInfo.DisplayFileName = UploadedFileManager.GetUrlFileName(uploadedFile);
// Reading request download range
var requestedRanges = HeadersParser.ParseHttpRequestHeaderMultipleRange(context.Request, fileLength);
// apply the ranges to the download info
downloadInfo.InitializeRanges(requestedRanges);
string etagMatched;
int outcomeStausCode = 200;
// validating the ranges specified
if (!HeadersParser.ValidatePartialRequest(context.Request, downloadInfo, out etagMatched, ref outcomeStausCode))
{
// the request is invalid, this is the invalid code
context.Response.StatusCode = outcomeStausCode;
// show to the client what is the real ETag
if (!string.IsNullOrEmpty(etagMatched))
{
context.Response.AppendHeader("ETag", etagMatched);
}
// stop the preoccess
// but don't hassle with error messages
return;
}
// user ID, or IP or anything you use to identify the user
//var userIP = context.Request.UserHostAddress;
// Option 1: limiting the download speed for this file for this user!
//UserSpeedLimitManager.StartNewDownload(downloadInfo, userIP, DownloadLimit);
// Option 2: Limiting only this connection
downloadInfo.LimitTransferSpeed(DownloadLimit);
// It is very important to destory the DownloadProcess object
// Here the using block does it for us.
using (var process = new DownloadProcess(downloadInfo))
{
var state = DownloadProcess.DownloadProcessState.None;
try
{
// start the download
state = process.ProcessDownload(context.Response);
}
catch (HttpException)
{
// preventing:
// System.Web.HttpException (0x800703E3): The remote host closed the connection. The error code is 0x800703E3.
}
// checking the state of the download
if (state == DownloadProcess.DownloadProcessState.LastPartfinished)
{
// all parts of download are finish, do something here!
using (var db = new UploadDb())
{
var dbFile = db.Files.FirstOrDefault(a => a.UploadedFileID == uploadedFile.UploadedFileID);
if (dbFile != null)
{
dbFile.Downloaded++;
dbFile.LastDownload = DateTime.Now.ToUniversalTime();
db.SaveChanges();
}
}
}
}
}
}
catch (Exception ex)
{
SiteException.LogException(ex, "ID: " + idStr);
throw;
}
}