private ResourceDownload DownloadForResourceAtUrlLocalBasePathLocalFileNameCredentialsModificationDate(Uri url, string localBasePath, string localFileName, NetworkCredential credentials, DateTime?modificationDate)
{
var localUrl = this.LocalPathForResourceAtUrl(url, localBasePath, localFileName);
ResourceDownload download = new ResourceDownload(url, localUrl, credentials, modificationDate);
return(download);
}
private void ContinueQueue()
{
this.ResourceDownloads.Remove(this.currentResourceDownload);
this.currentResourceDownload.Connection = null;
this.currentResourceDownload = null;
this.StartDownloadForFrontMostFile();
}
/// <summary>
/// Adds given resource to download list
/// </summary>
/// <param name="resourceDownload">Resource to download</param>
public void AddResourceDownload(ResourceDownload resourceDownload)
{
resourceDownload.DownloadManager = this;
if (this.ResourceDownloads.Contains(resourceDownload))
{
return;
}
this.ResourceDownloads.Add(resourceDownload);
this.StartDownloadForFrontMostFile();
}
private async void StartDownloadForFrontMostFile()
{
if (this.ResourceDownloads.Count == 0 || this.currentResourceDownload != null)
{
return;
}
this.StopProcessingDownloadQueue();
this.currentResourceDownload = this.ResourceDownloads[0];
ResourceDownload downloadToStart = this.currentResourceDownload;
var remoteData = new RemoteData(this.currentResourceDownload.DownloadUrl, this.remoteSession, this);
var userAgent = ServerSession.CurrentSession.CrmServer.UserAgent;
if (userAgent?.Length > 0)
{
remoteData.CustomHttpHeaderFields["User-Agent"] = userAgent;
}
ulong?downloadOffset = null;
var path = this.currentResourceDownload.LocalUrl;
if (this.StorageService.FileExists(path) && this.currentResourceDownload.ShouldAutoResume && this.serverSupportRangeHeader)
{
this.currentDownloadFileHandle = await this.StorageService.GetFileStreamForWrite(path);
this.currentDownloadFileHandle.Seek(this.currentDownloadFileHandle.Length, SeekOrigin.Begin);
downloadOffset = await this.StorageService.GetFileSize(path);
}
else
{
if (this.StorageService.FileExists(path))
{
Exception error;
this.StorageService.TryDelete(path, out error);
}
await this.StorageService.CreateFile(path);
this.currentDownloadFileHandle = await this.StorageService.GetFileStreamForWrite(path);
}
if (downloadOffset.HasValue)
{
remoteData.CustomHttpHeaderFields["Range"] = $"bytes={downloadOffset}-";
this.currentResourceDownload.NumberOfBytesDownloaded = (uint)downloadOffset.Value;
}
if (downloadToStart != null)
{
this.StartRequest(remoteData);
}
}
/// <summary>
/// Moves given resource download list to front of the queue
/// </summary>
/// <param name="resourceDownloadsToMove">Resource download list</param>
/// <returns>Returns true if succeeds</returns>
public bool MoveResourceDownloadsToFrontOfQueue(List <ResourceDownload> resourceDownloadsToMove)
{
if (resourceDownloadsToMove.Count == 0)
{
return(false);
}
var firstDownload = resourceDownloadsToMove[0];
if (this.currentResourceDownload == firstDownload)
{
return(false);
}
foreach (var download in resourceDownloadsToMove)
{
this.ResourceDownloads.Remove(download);
}
this.ResourceDownloads.InsertRange(0, resourceDownloadsToMove);
if (this.currentDownloadFileHandle != null)
{
this.currentDownloadFileHandle.Flush();
this.currentDownloadFileHandle.Dispose();
this.currentDownloadFileHandle = null;
}
ResourceDownload cancelledDownload = this.currentResourceDownload;
if (this.currentResourceDownload != null)
{
this.currentResourceDownload.Connection?.Cancel();
this.currentResourceDownload.Connection = null;
this.currentResourceDownload = null;
}
if (cancelledDownload != null)
{
Messenger.Default.Send(SyncManagerMessage.Create(
SyncManagerMessageKey.WillCancelRunningDownloadNotification,
new Dictionary <string, object> {
{ "TheObject", cancelledDownload }
}));
}
this.StartDownloadForFrontMostFile();
return(true);
}
private ResourceDownload AttemptToQueueDownloadForResourceAtUrl(Uri url, ResourceDownloadManager downloadManager, string localBasePath, string localFileName, NetworkCredential credentials, DateTime?modificationDate, bool shouldAutoResume)
{
ResourceDownload existingDownload = this.HasRunningDownloadForResourceAtUrl(url);
if (existingDownload != null)
{
return(existingDownload);
}
ResourceDownload download = this.DownloadForResourceAtUrlLocalBasePathLocalFileNameCredentialsModificationDate(url, localBasePath, localFileName, credentials, modificationDate);
download.ShouldAutoResume = shouldAutoResume;
downloadManager.AddResourceDownload(download);
return(download);
}
/// <summary>
/// Returns resource download object for given uri
/// </summary>
/// <param name="downloadUrl">Download uri</param>
/// <returns><see cref="ResourceDownload"/></returns>
public ResourceDownload ResourceDownloadForUrl(Uri downloadUrl)
{
ResourceDownload download = null;
foreach (var downloadItem in this.ResourceDownloads)
{
if (downloadItem.DownloadUrl.AbsoluteUri == downloadUrl.AbsoluteUri)
{
download = downloadItem;
break;
}
}
return(download);
}
/// <summary>
/// Cancels resource download
/// </summary>
/// <param name="resourceDownload">Resource download</param>
/// <returns>Returns true if succeeds</returns>
public bool CancelResourceDownload(ResourceDownload resourceDownload)
{
var cancelledDownload = false;
if (this.currentDownloadFileHandle != null)
{
this.currentDownloadFileHandle.Flush();
this.currentDownloadFileHandle.Dispose();
this.currentDownloadFileHandle = null;
}
if (this.currentResourceDownload == resourceDownload)
{
if (this.serverSupportRangeHeader == false)
{
Exception error;
this.StorageService.TryDelete(this.currentResourceDownload.LocalUrl, out error);
}
this.currentResourceDownload.Connection?.Cancel();
this.currentResourceDownload.Connection = null;
this.currentResourceDownload = null;
}
if (this.ResourceDownloads.Contains(resourceDownload))
{
cancelledDownload = true;
}
this.ResourceDownloads.Remove(resourceDownload);
Messenger.Default.Send(SyncManagerMessage.Create(
SyncManagerMessageKey.WillCancelRunningDownloadNotification,
new Dictionary <string, object> {
{ "TheObject", resourceDownload }
}));
return(cancelledDownload);
}
/// <summary>
/// Stop processing download queue
/// </summary>
public void StopProcessingDownloadQueue()
{
this.currentDownloadFileHandle?.Dispose();
this.currentDownloadFileHandle = null;
var currentDownload = this.currentResourceDownload;
if (this.currentResourceDownload != null)
{
this.currentResourceDownload.Connection?.Cancel();
this.currentResourceDownload.Connection = null;
this.currentResourceDownload = null;
}
if (currentDownload != null)
{
Messenger.Default.Send(SyncManagerMessage.Create(
SyncManagerMessageKey.WillCancelRunningDownloadNotification,
new Dictionary <string, object> {
{ "TheObject", currentDownload }
}));
}
}
/// <summary>
/// Prioritizes given download
/// </summary>
/// <param name="resourceDownload">Resource Download instance</param>
/// <returns>Returns true if succeeds</returns>
public bool PrioritizeDownload(ResourceDownload resourceDownload)
{
return(resourceDownload.DownloadManager.MoveResourceDownloadToFrontOfQueue(resourceDownload));
}
/// <summary>
/// Moves given resource download to front of the queue
/// </summary>
/// <param name="resourceDownload">Resource download</param>
/// <returns>Returns true if succeeds</returns>
public bool MoveResourceDownloadToFrontOfQueue(ResourceDownload resourceDownload)
{
return(this.MoveResourceDownloadsToFrontOfQueue(new List <ResourceDownload> {
resourceDownload
}));
}