|
public DownloadBlob ( |
||
| uri | The blob url from which file needs to be downloaded.If blob has private read permissions then appropriate sas url need to be passed | |
| localFile | string | The full path where file will be saved |
| fileEncryption | Microsoft.WindowsAzure.MediaServices.Client.FileEncryption | The file encryption if file has been encrypted. Pass null if no encryption has been used |
| initializationVector | ulong | The initialization vector if encryption has been used. |
| cancellationToken | The cancellation token. | |
| retryPolicy | IRetryPolicy | The RetryPolicy delegate returns a ShouldRetry delegate, which can be used to implement a custom retry policy.RetryPolicies class can bee used to get default policies |
| getSharedAccessSignature | Func |
A callback function which returns Sas signature for the file to be downloaded |
| return | Task | |
public virtual Task DownloadBlob(
Uri uri,
string localFile,
FileEncryption fileEncryption,
ulong initializationVector,
CancellationToken cancellationToken,
IRetryPolicy retryPolicy,
Func<string> getSharedAccessSignature = null
)
{
return DownloadBlob(uri, localFile, fileEncryption, initializationVector, null, cancellationToken, retryPolicy, getSharedAccessSignature);
}
|
BlobTransferClient::DownloadBlob ( |
/// <summary>
/// Downloads the file asynchronously .
/// </summary>
/// <param name="destinationPath">The path to download the file to.</param>
/// <param name="blobTransferClient">The <see cref="BlobTransferClient"/> which is used to download files.</param>
/// <param name="locator">An asset <see cref="ILocator"/> which defines permissions associated with the Asset.</param>
/// <param name="retryPolicy">The retry policy.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A function delegate that returns the future result to be available through the Task.</returns>
internal Task DownloadToFileAsync(string destinationPath, BlobTransferClient blobTransferClient, ILocator locator, IRetryPolicy retryPolicy, CancellationToken cancellationToken)
{
FileEncryption fileEncryption = this.GetFileEncryption();
cancellationToken.Register(() => this.Cleanup(null, fileEncryption, null, null));
return(Task.Factory.StartNew(() =>
{
cancellationToken.ThrowIfCancellationRequested(() => this.Cleanup(null, fileEncryption, null, null));
ulong iv = Convert.ToUInt64(this.InitializationVector, CultureInfo.InvariantCulture);
UriBuilder uriBuilder = new UriBuilder(locator.BaseUri);
uriBuilder.Path += String.Concat("/", Name);
blobTransferClient.TransferProgressChanged += this.OnDownloadBlobTransferProgressChanged;
blobTransferClient.DownloadBlob(
uriBuilder.Uri,
destinationPath,
fileEncryption,
iv,
cancellationToken,
retryPolicy,
() => locator.ContentAccessComponent)
.Wait(cancellationToken);
cancellationToken.ThrowIfCancellationRequested(() => this.Cleanup(null, fileEncryption, null, null));
},
cancellationToken)
.ContinueWith(
t =>
{
t.ThrowIfFaulted(() => this.Cleanup(null, fileEncryption, null, null));
cancellationToken.ThrowIfCancellationRequested(() => this.Cleanup(null, fileEncryption, null, null));
this.Cleanup(null, fileEncryption, null, null);
},
cancellationToken));
}
