public Response <PathInfo> Upload(
Stream content,
PathHttpHeaders httpHeaders,
DataLakeRequestConditions conditions,
IProgress <long> progressHandler,
CancellationToken cancellationToken)
{
_client.Create(
httpHeaders: httpHeaders,
conditions: conditions,
cancellationToken: cancellationToken);
// After the File is Create, Lease ID is the only valid request parameter.
conditions = new DataLakeRequestConditions {
LeaseId = conditions?.LeaseId
};
// If we can compute the size and it's small enough
if (PartitionedUploadExtensions.TryGetLength(content, out long contentLength) &&
contentLength < _singleUploadThreshold)
{
// Upload it in a single request
_client.Append(
content,
offset: 0,
leaseId: conditions?.LeaseId,
progressHandler: progressHandler,
cancellationToken: cancellationToken);
// Calculate flush position
long flushPosition = contentLength;
return(_client.Flush(
position: flushPosition,
httpHeaders: httpHeaders,
conditions: conditions,
cancellationToken: cancellationToken));
}
// If the caller provided an explicit block size, we'll use it.
// Otherwise we'll adjust dynamically based on the size of the
// content.
int blockSize =
_blockSize != null ? _blockSize.Value :
contentLength < Constants.LargeUploadThreshold ?
Constants.DefaultBufferSize :
Constants.LargeBufferSize;
// Otherwise stage individual blocks one at a time. It's not as
// fast as a parallel upload, but you get the benefit of the retry
// policy working on a single block instead of the entire stream.
return(UploadInSequence(
content,
blockSize,
httpHeaders,
conditions,
progressHandler,
cancellationToken));
}
private static void PerformWriteFlushReadSeek(DataLakeFileSystemClient client)
{
string fileName = "/Test/dir1/testFilename1.txt";
DataLakeFileClient file = client.GetFileClient(fileName);
// Create the file
Stream stream = BinaryData.FromString("This is the first line.\nThis is the second line.\n").ToStream();
long length = stream.Length;
file.Upload(stream, true);
// Append to the file
stream = BinaryData.FromString("This is the third line.\nThis is the fourth line.\n").ToStream();
file.Append(stream, length);
file.Flush(length + stream.Length);
// Read the file
using (var readStream = file.OpenRead())
{
byte[] readData = new byte[1024];
// Read 40 bytes at this offset
int readBytes = readStream.Read(readData, 25, 40);
Console.WriteLine("Read output of 40 bytes from offset 25: " + Encoding.UTF8.GetString(readData, 0, readBytes));
}
}
private static string serviceUri = "FILL-IN-HERE"; // full account FQDN, not just the account name - it should look like https://{ACCOUNTNAME}.dfs.core.windows.net/
public static void Main(string[] args)
{
// Create Client Secret Credential
var creds = new ClientSecretCredential(tenantId, applicationId, clientSecret);
// Create data lake file service client object
DataLakeServiceClient serviceClient = new DataLakeServiceClient(new Uri(serviceUri), creds);
var name = "sample-filesystem" + Guid.NewGuid().ToString("n").Substring(0, 8);
// Create data lake file system client object
DataLakeFileSystemClient filesystemclient = serviceClient.GetFileSystemClient(name);
filesystemclient.CreateIfNotExists();
try
{
long length;
string fileName = "/Test/testFilename1.txt";
DataLakeFileClient file = filesystemclient.GetFileClient(fileName);
// Upload a file - automatically creates any parent directories that don't exist
length = BinaryData.FromString("This is test data to write.\r\nThis is the second line.\r\n").ToStream().Length;
file.Upload(BinaryData.FromString("This is test data to write.\r\nThis is the second line.\r\n").ToStream(), true);
file.Append(BinaryData.FromString("This is the added line.\r\n").ToStream(), length);
file.Flush(length + BinaryData.FromString("This is the added line.\r\n").ToStream().Length);
//Read file contents
Response <FileDownloadInfo> fileContents = file.Read();
Console.WriteLine(BinaryData.FromStream(fileContents.Value.Content).ToString());
// Get the properties of the file
PathProperties pathProperties = file.GetProperties();
PrintDirectoryEntry(pathProperties);
// Rename a file
string destFilePath = "/Test/testRenameDest3.txt";
file.Rename(destFilePath);
file = filesystemclient.GetFileClient(destFilePath);
Console.WriteLine("The file URI is " + file.Uri);
// Enumerate directory
foreach (var pathItem in filesystemclient.GetPaths("/Test"))
{
PrintDirectoryEntry(pathItem);
}
// Delete a directory and all it's subdirectories and files
filesystemclient.DeleteDirectory("/Test");
}
finally
{
filesystemclient.Delete();
}
Console.WriteLine("Done. Press ENTER to continue ...");
Console.ReadLine();
}
public void Append()
{
// Create three temporary Lorem Ipsum files on disk that we can upload
int contentLength = 10;
string sampleFileContentPart1 = CreateTempFile(SampleFileContent.Substring(0, contentLength));
string sampleFileContentPart2 = CreateTempFile(SampleFileContent.Substring(contentLength, contentLength));
string sampleFileContentPart3 = CreateTempFile(SampleFileContent.Substring(contentLength * 2, contentLength));
// Make StorageSharedKeyCredential to pass to the serviceClient
string storageAccountName = StorageAccountName;
string storageAccountKey = StorageAccountKey;
Uri serviceUri = StorageAccountBlobUri;
StorageSharedKeyCredential sharedKeyCredential = new StorageSharedKeyCredential(storageAccountName, storageAccountKey);
// Create DataLakeServiceClient using StorageSharedKeyCredentials
DataLakeServiceClient serviceClient = new DataLakeServiceClient(serviceUri, sharedKeyCredential);
// Get a reference to a filesystem named "sample-filesystem-append" and then create it
DataLakeFileSystemClient filesystem = serviceClient.GetFileSystemClient(Randomize("sample-filesystem-append"));
filesystem.Create();
try
{
// Get a reference to a file named "sample-file" in a filesystem
DataLakeFileClient file = filesystem.GetFileClient(Randomize("sample-file"));
// Create the file
file.Create();
// Verify we created one file
Assert.AreEqual(1, filesystem.GetPaths().Count());
// Append data to an existing DataLake File. Append is currently limited to 4000 MB per call.
// To upload a large file all at once, consider using Upload() instead.
file.Append(File.OpenRead(sampleFileContentPart1), 0);
file.Append(File.OpenRead(sampleFileContentPart2), contentLength);
file.Append(File.OpenRead(sampleFileContentPart3), contentLength * 2);
file.Flush(contentLength * 3);
// Verify the contents of the file
PathProperties properties = file.GetProperties();
Assert.AreEqual(contentLength * 3, properties.ContentLength);
}
finally
{
// Clean up after the test when we're finished
filesystem.Delete();
}
}
public void Read()
{
// Create a temporary Lorem Ipsum file on disk that we can upload
string originalPath = CreateTempFile(SampleFileContent);
// Get a temporary path on disk where we can download the file
string downloadPath = CreateTempPath();
// Make StorageSharedKeyCredential to pass to the serviceClient
string storageAccountName = StorageAccountName;
string storageAccountKey = StorageAccountKey;
Uri serviceUri = StorageAccountBlobUri;
StorageSharedKeyCredential sharedKeyCredential = new StorageSharedKeyCredential(storageAccountName, storageAccountKey);
// Create DataLakeServiceClient using StorageSharedKeyCredentials
DataLakeServiceClient serviceClient = new DataLakeServiceClient(serviceUri, sharedKeyCredential);
// Get a reference to a filesystem named "sample-filesystem-read" and then create it
DataLakeFileSystemClient filesystem = serviceClient.GetFileSystemClient(Randomize("sample-filesystem-read"));
filesystem.Create();
try
{
// Get a reference to a file named "sample-file" in a filesystem
DataLakeFileClient file = filesystem.GetFileClient(Randomize("sample-file"));
// First upload something the DataLake file so we have something to download
file.Create();
file.Append(File.OpenRead(originalPath), 0);
file.Flush(SampleFileContent.Length);
// Download the DataLake file's contents and save it to a file
#region Snippet:SampleSnippetDataLakeFileClient_Read
Response <FileDownloadInfo> fileContents = file.Read();
#endregion Snippet:SampleSnippetDataLakeFileClient_Read
using (FileStream stream = File.OpenWrite(downloadPath))
{
fileContents.Value.Content.CopyTo(stream);
}
// Verify the contents
Assert.AreEqual(SampleFileContent, File.ReadAllText(downloadPath));
}
finally
{
// Clean up after the test when we're finished
filesystem.Delete();
}
}
public void Append_Simple()
{
// Create Sample File to read content from
string sampleFilePath = CreateTempFile(SampleFileContent);
// Make StorageSharedKeyCredential to pass to the serviceClient
string storageAccountName = StorageAccountName;
string storageAccountKey = StorageAccountKey;
Uri serviceUri = StorageAccountBlobUri;
StorageSharedKeyCredential sharedKeyCredential = new StorageSharedKeyCredential(storageAccountName, storageAccountKey);
// Create DataLakeServiceClient using StorageSharedKeyCredentials
DataLakeServiceClient serviceClient = new DataLakeServiceClient(serviceUri, sharedKeyCredential);
// Get a reference to a filesystem named "sample-filesystem-append" and then create it
DataLakeFileSystemClient filesystem = serviceClient.GetFileSystemClient(Randomize("sample-filesystem-append"));
filesystem.Create();
try
{
#region Snippet:SampleSnippetDataLakeFileClient_Append
// Create a file
DataLakeFileClient file = filesystem.GetFileClient(Randomize("sample-file"));
file.Create();
// Append data to the DataLake File
file.Append(File.OpenRead(sampleFilePath), 0);
file.Flush(SampleFileContent.Length);
#endregion Snippet:SampleSnippetDataLakeFileClient_Append
// Verify the contents of the file
PathProperties properties = file.GetProperties();
Assert.AreEqual(SampleFileContent.Length, properties.ContentLength);
}
finally
{
// Clean up after the test when we're finished
filesystem.Delete();
}
}