public async Task <ActionResult> SelectSampleDataSource(MainViewModel main)
{
main.SelectedDataSourceName = main.SelectedSampleDataSourceName;
string fileName = main.SelectedDataSourceName.Split('/').Last();
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(_configuration.GetConnectionString("StorageConnectionString"));
// Create a CloudFileClient object for credentialed access to Azure Files.
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
// Get a reference to the file share we created previously.
CloudFileShare cloudFileShare = fileClient.GetShareReference("samples");
await cloudFileShare.CreateIfNotExistsAsync();
CloudFileDirectory cloudFileDirectory = cloudFileShare.GetRootDirectoryReference();
CloudFile cloudFile = cloudFileDirectory.GetFileReference(fileName);
MemoryStream stream = new MemoryStream();
await cloudFile.DownloadToStreamAsync(stream);
stream.Position = 0;
StreamReader reader = new StreamReader(stream);
main.RawData = reader.ReadToEnd();
//Copied raw data to processed data in case user skips the pre-processing/cleansing step
main.ProcessedData = main.RawData;
return(PartialView("_DisplayDataSource", main));
}
public static async Task <IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "post")] PostData data, ILogger log)
{
log.LogInformation($"C# Blob trigger function Processed blob\n Name:{data.name}\n StorageAccount: {data.storageAccount}\n SourceFileShare: {data.sourceFileShare}\n DestinationFolder: {data.destinationFolder}");
if (data.name.Split('.').Last().ToLower() == "zip")
{
try{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(data.storageAccount);
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare fileShare = fileClient.GetShareReference(data.sourceFileShare);
CloudFile zipFile = fileShare.GetRootDirectoryReference().GetFileReference(data.name);
MemoryStream blobMemStream = new MemoryStream();
await zipFile.DownloadToStreamAsync(blobMemStream);
extract(blobMemStream, log, fileShare, data);
}
catch (Exception ex) {
log.LogInformation($"Error! Something went wrong: {ex.Message}");
return(new ExceptionResult(ex, true));
}
}
return(new OkObjectResult("Unzip succesfull"));
}
public async Task Test_30_SAS()
{
var share = _client.GetShareReference("photos");
var rootDirectory = share.GetRootDirectoryReference();
var file = rootDirectory.GetFileReference("Joins.png");
// Get a Shared Access Signature for that file that is for read access for that file
var sasToken = file.GetSharedAccessSignature(
new SharedAccessFilePolicy
{
Permissions = SharedAccessFilePermissions.Read,
SharedAccessExpiryTime = new DateTimeOffset(DateTime.UtcNow.AddMinutes(5))
}
);
var sasCreds = new StorageCredentials(sasToken);
var sasCloudFile = new CloudFile(
new Uri("https://omazurestoragecli.file.core.windows.net/photos/Joins.png"),
sasCreds
);
bool fileExists = await sasCloudFile.ExistsAsync();
Check.That(fileExists).IsTrue();
using (var ms = new MemoryStream())
{
await sasCloudFile.DownloadToStreamAsync(ms);
Check.That(ms.Length).IsStrictlyGreaterThan(0);
}
}
public override async Task <FileData> GetAsync(FileGetOptions fileGetOptions)
{
FileData file = new FileData();
CloudStorageAccount storageAccount = Authorized(fileGetOptions);
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare fileshare = fileClient.GetShareReference(fileGetOptions.Folder);
if (fileshare.ExistsAsync().Result)
{
CloudFileDirectory cFileDir = fileshare.GetRootDirectoryReference();
CloudFile cFile = cFileDir.GetFileReference(fileGetOptions.Key);
if (cFile.ExistsAsync().Result)
{
file.Stream.Position = 0;
await cFile.DownloadToStreamAsync(file.Stream);
}
}
file.Type = "Azure File Storage";
return(file);
}
public async Task <string> GetLogContent()
{
try
{
CloudFileDirectory root = Share.GetRootDirectoryReference();
File = root.GetFileReference($"log_{DateTime.Now.ToString("dd_MM_yyyy")}.log");
string content;
if (!await File.ExistsAsync())
{
content = "";
}
else
{
using (var memoryStream = new MemoryStream())
{
await File.DownloadToStreamAsync(memoryStream);
content = Encoding.UTF8.GetString(memoryStream.ToArray());
}
}
return(content);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// DownloadFileAsyncStream
/// </summary>
/// <param name="shareName"></param>
/// <param name="sourceFolder"></param>
/// <param name="fileName"></param>
/// <returns></returns>
public async Task <MemoryStream> DownloadFileAsyncStream(string shareName, string sourceFolder, string fileName)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(settings.ConnectionString);
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare fileShare = fileClient.GetShareReference(shareName);
if (await fileShare.ExistsAsync())
{
CloudFileDirectory rootDirectory = fileShare.GetRootDirectoryReference();
if (await rootDirectory.ExistsAsync())
{
CloudFileDirectory customDirectory = rootDirectory.GetDirectoryReference(sourceFolder);
if (await customDirectory.ExistsAsync())
{
CloudFile cloudfile = customDirectory.GetFileReference(fileName);
if (await cloudfile.ExistsAsync())
{
using (var stream = new MemoryStream())
{
await cloudfile.DownloadToStreamAsync(stream);
return(stream);
}
}
}
}
}
return(null);
}
public async Task <Stream> GetFileContentStreamAsync(IFile file)
{
var cloudFile = new CloudFile(new Uri(file.Id), fileShare.ServiceClient.Credentials);
Stream memoryStream = new MemoryStream();
await cloudFile.DownloadToStreamAsync(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
return(memoryStream);
}
public async Task DownloadStream(Stream stream, string name)
{
CloudFile originalFile = baseDir.GetFileReference(name);
if (!await originalFile.ExistsAsync())
{
return;
}
await originalFile.DownloadToStreamAsync(stream);
}
/// <summary>
/// Gets the file.
/// </summary>
/// <returns>The file.</returns>
/// <param name="type">What type of File is being retrieved</param>
/// <param name="guid">The GUID for the File</param>
public async Task <Stream> GetFileAsStream(FileType type, string guid)
{
CloudFileShare fileShare = cloud.CreateCloudFileClient().GetShareReference(type.ToString().ToLower());
CloudFileDirectory root = fileShare.GetRootDirectoryReference();
CloudFile file = root.GetFileReference(guid);
Stream memstream = new MemoryStream();
await file.DownloadToStreamAsync(memstream);
return(await file.OpenReadAsync());
}
private async Task <FileContent> ParseFileContent(CloudFile cloudFile)
{
using (var memoryStream = new MemoryStream())
{
await cloudFile.DownloadToStreamAsync(memoryStream);
return(new FileContent
{
FileName = cloudFile.Name,
Content = memoryStream.ToArray()
});
}
}
public async Task <MemoryStream> GetFile(string clientId, string filename)
{
this.Init();
CloudFileShare share = this._cloudFileClient.GetShareReference(this._fileStorageOptions.ShareName);
bool shareExist = await share.ExistsAsync();
if (shareExist != true)
{
throw new ServiceOperationException("No such share.");
}
//Get root directory
CloudFileDirectory rootDirectory = share.GetRootDirectoryReference();
bool rootDirExist = await rootDirectory.ExistsAsync();
if (rootDirExist != true)
{
throw new ServiceOperationException("No such root dir.");
}
//Get clients directory
CloudFileDirectory clientsFolder = rootDirectory.GetDirectoryReference(clientId);
bool clientsDirExist = await clientsFolder.ExistsAsync();
if (clientsDirExist != true)
{
throw new ServiceOperationException("No such client dir.");
}
//Get reference to file
//If file already exists it will be overwritten
CloudFile file = clientsFolder.GetFileReference(filename);
bool fileExists = await file.ExistsAsync();
if (fileExists != true)
{
throw new ServiceOperationException("No such file");
}
MemoryStream ms = new MemoryStream();
await file.DownloadToStreamAsync(ms);
ms.Position = 0;
return(ms);
}
private async Task <Stream> CopyCloudFileWithStreamOutputAsync(CloudFile source, CloudFile destination)
{
MemoryStream downloadStream = new MemoryStream();
await source.DownloadToStreamAsync(downloadStream).ConfigureAwait(false);
downloadStream.Position = 0;
using (MemoryStream upload = new MemoryStream())
{
downloadStream.CopyTo(upload);
upload.Position = 0;
await destination.UploadFromStreamAsync(upload).ConfigureAwait(false);
}
downloadStream.Position = 0;
return(downloadStream);
}
public async Task <byte[]> DownloadFile(string shareName, string folder, string fileName)
{
byte[] toReturn = null;
try
{
CloudFile cloudFile = await this.GetFileReference(shareName, folder, fileName);
MemoryStream ms = new MemoryStream();
await cloudFile.DownloadToStreamAsync(ms);
toReturn = ms.ToArray();
}
catch (Exception ex)
{
this.ErrorMessage = ex.ToString();
}
return(toReturn);
}
public async Task <FileResult> GetPdf(string fileName)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));
// Create a CloudFileClient object for credentialed access to Azure Files.
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
// Get a reference to the file share we created previously.
CloudFileShare share = fileClient.GetShareReference("ankerhpdf");
// Ensure that the share exists.
if (share.Exists())
{
// Get a reference to the root directory for the share.
CloudFileDirectory rootDir = share.GetRootDirectoryReference();
// Get a reference to the directory we created previously.
CloudFileDirectory sampleDir = rootDir.GetDirectoryReference("Faktura");
// Ensure that the directory exists.
if (sampleDir.Exists())
{
// Get a reference to the file we created previously.
CloudFile file = sampleDir.GetFileReference(fileName);
// Ensure that the file exists.
if (file.Exists())
{
MemoryStream ms = new MemoryStream();
await file.DownloadToStreamAsync(ms);
ms.Seek(0, SeekOrigin.Begin);
return(File(ms, "application/pdf"));
}
}
}
return(null);
}
/// <summary>
/// Downloads a file from the Microsoft Azure File service by calling <see cref="CloudFile.DownloadToStreamAsync(Stream, AccessCondition, FileRequestOptions, OperationContext, CancellationToken)"/>.
/// </summary>
/// <param name="cancellationToken">The token used to signal cancellation request.</param>
public override async Task RunAsync(CancellationToken cancellationToken)
{
await _cloudFile.DownloadToStreamAsync(Stream.Null, cancellationToken);
}
/// <summary>
/// Download data to the stream.
/// </summary>
/// <param name="file">The cloud file.</param>
/// <param name="stream">The stream to write to.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The async task.</returns>
public async Task DownloadAsync(CloudFile file, Stream stream, CancellationToken cancellationToken)
{
await file.DownloadToStreamAsync(stream, cancellationToken);
}
public async Task <Stream> ReadFileAsync(string share, string filename, Stream stream, CancellationToken token = default(CancellationToken))
{
if (string.IsNullOrEmpty(share))
{
throw new ArgumentNullException("share");
}
if (string.IsNullOrEmpty("filename"))
{
throw new ArgumentNullException("filename");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
Exception error = null;
Stopwatch watch = new Stopwatch();
watch.Start();
double time = watch.Elapsed.TotalMilliseconds;
long bytesTransferred = 0;
try
{
CloudFileShare choudShare = client.GetShareReference(share);
CloudFileDirectory dir = choudShare.GetRootDirectoryReference();
CloudFile file = dir.GetFileReference(filename);
IProgress <StorageProgress> progressHandler = new Progress <StorageProgress>(
progress =>
{
bytesTransferred = bytesTransferred < progress.BytesTransferred ? progress.BytesTransferred : bytesTransferred;
if (watch.Elapsed.TotalMilliseconds > time + 1000.0 && bytesTransferred <= progress.BytesTransferred)
{
OnDownloadBytesTransferred?.Invoke(this, new BytesTransferredEventArgs(share, filename, bytesTransferred, file.Properties.Length));
}
});
await file.DownloadToStreamAsync(stream, default(AccessCondition), default(FileRequestOptions), default(OperationContext), progressHandler, token);
}
catch (Exception ex)
{
if (ex.InnerException is TaskCanceledException)
{
stream = null;
}
else
{
error = ex;
throw ex;
}
}
finally
{
watch.Stop();
OnDownloadCompleted?.Invoke(this, new BlobCompleteEventArgs(share, filename, token.IsCancellationRequested, error));
}
return(stream);
}
/// <summary>
/// Download data to the stream.
/// </summary>
/// <param name="file">The cloud file.</param>
/// <param name="stream">The stream to write to.</param>
/// <returns>The async task.</returns>
public async Task DownloadAsync(CloudFile file, Stream stream)
{
await file.DownloadToStreamAsync(stream);
}
public static void DownloadToStream(this CloudFile file, Stream target, AccessCondition accessCondition = null, FileRequestOptions options = null, OperationContext operationContext = null)
{
file.DownloadToStreamAsync(target, accessCondition, options, operationContext).GetAwaiter().GetResult();
}
