public async Task <IEnumerable <EventBase> > ListInstanceEventsAsync(
StorageObjectLocator locator,
CancellationToken cancellationToken)
{
using (TraceSources.IapDesktop.TraceMethod().WithParameters(locator))
{
var events = new List <EventBase>();
using (var stream = await this.storageAdapter.DownloadObjectToMemoryAsync(
locator,
cancellationToken)
.ConfigureAwait(false))
using (var reader = new StreamReader(stream, Encoding.UTF8))
{
// The file contains a sequence of JSON structures, separated
// by a newline.
string line;
while ((line = reader.ReadLine()) != null)
{
// The file might contain empty lines.
if (!string.IsNullOrWhiteSpace(line))
{
events.Add(EventFactory.FromRecord(LogRecord.Deserialize(line)));
}
}
}
return(events);
}
}
public async Task <Stream> DownloadObjectToMemoryAsync(
StorageObjectLocator locator,
CancellationToken cancellationToken)
{
using (TraceSources.IapDesktop.TraceMethod().WithParameters(locator))
{
try
{
var buffer = new MemoryStream();
var result = await this.service.Objects
.Get(locator.Bucket, locator.ObjectName)
.DownloadAsync(buffer)
.ConfigureAwait(false);
if (result.Exception != null)
{
throw result.Exception;
}
buffer.Seek(0, SeekOrigin.Begin);
return(buffer);
}
catch (GoogleApiException e)
when((e.Error != null && (e.Error.Code == 403 || e.Error.Code == 404)) ||
e.Message == "Not Found" ||
e.Message.Contains("storage.objects.get access"))
{
throw new ResourceAccessDeniedException(
$"Access to storage bucket {locator.Bucket} has been denied", e);
}
}
}