public override async Task Run()
{
var ftpClient = new FtpRawLogClient(LoggerFactory, _configuration.FtpSourceUsername, _configuration.FtpSourcePassword);
var azureClient = new CloudBlobRawLogClient(LoggerFactory, _cloudStorageAccount);
// Collect directory listing.
var rawLogFileUris = await ftpClient.GetRawLogFileUris(_ftpServerUri);
// Prepare cloud storage blob container.
var cloudBlobContainer = await azureClient.CreateContainerIfNotExistsAsync(_configuration.AzureCdnCloudStorageContainerName);
foreach (var rawLogFileUri in rawLogFileUris)
{
try
{
var rawLogFile = new RawLogFileInfo(rawLogFileUri);
if (_azureCdnPlatform != rawLogFile.AzureCdnPlatform ||
!_configuration.AzureCdnAccountNumber.Equals(rawLogFile.AzureCdnAccountNumber, StringComparison.InvariantCultureIgnoreCase))
{
// Only process the raw log files matching the target CDN platform and account number.
continue;
}
var skipProcessing = false;
var uploadSucceeded = false;
var rawLogUri = rawLogFile.Uri;
// Check if this is an already renamed file:
// This would indicate that the file is being processed already (by another instance of this job),
// or that the file is being reprocessed (and the ".download" renamed file was left behind).
if (rawLogFile.IsPendingDownload)
{
// In order to support reprocessing ".gz" files,
// we only skip processing ".download" files that have been successfully uploaded to blob storage,
// which only happens when they have been processed successfully.
// Check if the original ".gz" file has already been uploaded to blob storage.
// If it already was uploaded to blob storage,
// we can skip processing this ".download" file and delete it from the FTP server.
var originalFileName = rawLogFile.FileName.Substring(0, rawLogFile.FileName.Length - FileExtensions.Download.Length);
skipProcessing = await azureClient.CheckIfBlobExistsAsync(cloudBlobContainer, originalFileName);
}
else
{
// We are processing a ".gz" file.
// Check if the file has already been uploaded to blob storage: are we reprocessing it?
var isReprocessing = await azureClient.CheckIfBlobExistsAsync(cloudBlobContainer, rawLogFile.FileName);
if (isReprocessing)
{
// As we are reprocessing this ".gz" file,
// we should first delete the ".download" file if it already exists on the FTP server.
var downloadFileUri = new Uri(rawLogFile.Uri + FileExtensions.Download);
await ftpClient.DeleteAsync(downloadFileUri);
}
// Rename the file on the origin to ensure we're not locking a file that still can be written to.
var downloadFileName = rawLogFile.FileName + FileExtensions.Download;
rawLogUri = await ftpClient.RenameAsync(rawLogFile, downloadFileName);
if (rawLogUri == null)
{
// Failed to rename the file. Leave it and try again later.
continue;
}
}
// Skip already processed ".download" files.
if (!skipProcessing)
{
// open the raw log from FTP
using (var rawLogStream = await ftpClient.OpenReadAsync(rawLogUri))
using (var rawLogStreamInMemory = new MemoryStream())
{
// copy the raw, compressed stream to memory - FTP does not like reading line by line
await rawLogStream.CopyToAsync(rawLogStreamInMemory);
rawLogStreamInMemory.Position = 0;
// process the raw, compressed memory stream
using (var rawGzipStream = new GZipInputStream(rawLogStreamInMemory))
{
// ensure the .download suffix is trimmed away
var fileName = rawLogFile.FileName.Replace(".download", string.Empty);
using (Logger.BeginScope("Started uploading file '{FileName}' to {BlobUri}.", fileName, rawLogFile.Uri.ToString()))
{
try
{
// open the resulting cleaned blob and stream modified entries
// note the missing using() statement so that we can skip committing if an exception occurs
var resultLogStream = await azureClient.OpenBlobForWriteAsync(cloudBlobContainer, rawLogFile, fileName);
try
{
using (var resultGzipStream = new GZipOutputStream(resultLogStream))
{
resultGzipStream.IsStreamOwner = false;
ProcessLogStream(rawGzipStream, resultGzipStream, fileName);
resultGzipStream.Flush();
}
// commit to blob storage
resultLogStream.Commit();
uploadSucceeded = true;
}
catch
{
uploadSucceeded = false;
throw;
}
Logger.LogInformation("Finished uploading file.");
}
catch (Exception exception)
{
Logger.LogError(
LogEvents.FailedBlobUpload,
exception,
LogMessages.FailedBlobUpload,
rawLogUri);
}
}
}
}
}
// Delete the renamed file from the origin.
if (skipProcessing || uploadSucceeded)
{
await ftpClient.DeleteAsync(rawLogUri);
}
}
catch (UnknownAzureCdnPlatformException exception)
{
// Log the failing file, but ignore it. Other files should go through just fine.
Logger.LogWarning(
LogEvents.UnknownAzureCdnPlatform,
exception,
LogMessages.UnknownAzureCdnPlatform);
}
catch (InvalidRawLogFileNameException exception)
{
// Log the failing file, but ignore it. Other files should go through just fine.
Logger.LogWarning(
LogEvents.InvalidRawLogFileName,
exception,
LogMessages.InvalidRawLogFileName);
}
}
}
public override async Task <bool> Run()
{
try
{
var ftpClient = new FtpRawLogClient(JobEventSource.Log, _ftpUsername, _ftpPassword);
var azureClient = new CloudBlobRawLogClient(JobEventSource.Log, _cloudStorageAccount);
// Collect directory listing.
IEnumerable <RawLogFileInfo> rawLogFiles = await ftpClient.GetRawLogFiles(_ftpServerUri);
// Prepare cloud storage blob container.
var cloudBlobContainer = await azureClient.CreateContainerIfNotExistsAsync(_cloudStorageContainerName);
foreach (var rawLogFile in rawLogFiles)
{
try
{
// Only process the raw log files matching the target CDN platform and account number.
if (_azureCdnPlatform == rawLogFile.AzureCdnPlatform && _azureCdnAccountNumber.Equals(rawLogFile.AzureCdnAccountNumber, StringComparison.InvariantCultureIgnoreCase))
{
bool alreadyUploaded = false;
bool uploadSucceeded = false;
Uri rawLogUri = rawLogFile.Uri;
// Check if this is an already renamed file.
if (rawLogFile.IsPendingDownload)
{
// Check if the file has already been uploaded to blob storage.
alreadyUploaded = await azureClient.CheckIfBlobExistsAsync(cloudBlobContainer, rawLogFile);
}
else
{
// Rename the file on the origin to ensure we're not locking a file that still can be written to.
rawLogUri = await ftpClient.RenameAsync(rawLogFile, rawLogFile.FileName + FileExtensions.Download);
if (rawLogUri == null)
{
// Failed to rename the file. Leave it and try again later.
continue;
}
}
if (!alreadyUploaded)
{
// open the raw log from FTP
using (var rawLogStream = await ftpClient.OpenReadAsync(rawLogUri))
using (var rawLogStreamInMemory = new MemoryStream())
{
// copy the raw, compressed stream to memory - FTP does not like reading line by line
await rawLogStream.CopyToAsync(rawLogStreamInMemory);
rawLogStreamInMemory.Position = 0;
// process the raw, compressed memory stream
using (var rawGzipStream = new GZipInputStream(rawLogStreamInMemory))
{
try
{
// ensure the .download suffix is trimmed away
var fileName = rawLogFile.FileName.Replace(".download", string.Empty);
Trace.TraceInformation("Uploading file '{0}'.", fileName);
JobEventSource.Log.BeginningBlobUpload(rawLogFile.Uri.ToString());
// open the resulting cleaned blob and stream modified entries
// note the missing using() statement so that we can skip committing if an exception occurs
var resultLogStream = await azureClient.OpenBlobForWriteAsync(cloudBlobContainer, rawLogFile, fileName);
try
{
using (var resultGzipStream = new GZipOutputStream(resultLogStream))
{
resultGzipStream.IsStreamOwner = false;
ProcessLogStream(rawGzipStream, resultGzipStream);
resultGzipStream.Flush();
}
// commit to blob storage
resultLogStream.Commit();
uploadSucceeded = true;
}
catch
{
resultLogStream = null;
uploadSucceeded = false;
throw;
}
Trace.TraceInformation("Finished uploading file '{0}' to '{1}'.", fileName, rawLogFile.Uri.AbsoluteUri);
JobEventSource.Log.FinishingBlobUpload(rawLogFile.Uri.ToString());
}
catch (Exception exception)
{
Trace.TraceError(exception.ToString());
JobEventSource.Log.FailedToUploadFile(rawLogFile.Uri.ToString(), exception.ToString());
}
}
}
}
// Delete the renamed file from the origin.
if (alreadyUploaded || uploadSucceeded)
{
await ftpClient.DeleteAsync(rawLogUri);
}
}
}
catch (UnknownAzureCdnPlatformException exception)
{
// Trace, but ignore the failing file. Other files should go through just fine.
Trace.TraceWarning(exception.ToString());
}
catch (InvalidRawLogFileNameException exception)
{
// Trace, but ignore the failing file. Other files should go through just fine.
Trace.TraceWarning(exception.ToString());
}
}
return(true);
}
catch (Exception exception)
{
Trace.TraceError(exception.ToString());
}
return(false);
}
