public async static void AcquireAndReleaseLeaseTest(BlobContext context, string containerName, string blobName)
{
CloudStorageAccount account = new CloudStorageAccount(new StorageCredentials(context.Account, context.Key), false);
CloudBlobClient client = new CloudBlobClient(new Uri(context.Address), account.Credentials);
CloudBlobContainer container = client.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(blobName);
BlobTestBase.UploadText(blob, "Text sent to cloud", Encoding.UTF8);
// acquire a release on the blob and check LeaseStatus to be "locked"
OperationContext opContext = new OperationContext();
HttpRequestMessage blobRequest = BlobHttpRequestMessageFactory.Lease(
blob.Uri,
context.Timeout,
LeaseAction.Acquire,
null /* proposed lease ID */,
60 /* lease duration */,
null /* break period */,
null /* access condition */,
null,
opContext,
SharedKeyCanonicalizer.Instance,
context.Credentials);
string leaseId = null;
using (HttpResponseMessage response = await BlobTestUtils.GetResponse(blobRequest, context))
{
leaseId = HttpResponseParsers.GetHeader(response, "x-ms-lease-id");
Assert.AreEqual <HttpStatusCode>(response.StatusCode, HttpStatusCode.Created);
}
blob.FetchAttributes();
Assert.AreEqual <LeaseStatus>(blob.Properties.LeaseStatus, LeaseStatus.Locked);
// release the release on the blob and check LeaseStatus to be "unlocked"
opContext = new OperationContext();
blobRequest = BlobHttpRequestMessageFactory.Lease(
blob.Uri,
context.Timeout,
LeaseAction.Release,
null /* proposed lease ID */,
null /* lease duration */,
null /* break period */,
AccessCondition.GenerateLeaseCondition(leaseId),
null,
opContext,
SharedKeyCanonicalizer.Instance,
context.Credentials);
using (HttpResponseMessage response = await BlobTestUtils.GetResponse(blobRequest, context))
{
Assert.AreEqual <HttpStatusCode>(response.StatusCode, HttpStatusCode.OK);
}
blob.FetchAttributes();
Assert.AreEqual <LeaseStatus>(blob.Properties.LeaseStatus, LeaseStatus.Unlocked);
blob.Delete();
}
/// <summary>
/// Extracts the next visibility time from a response message header.
/// </summary>
/// <param name="response">The web response.</param>
/// <returns>The time of next visibility stored in the header of the response.</returns>
public static DateTime GetNextVisibleTime(HttpResponseMessage response)
{
CommonUtility.AssertNotNull("response", response);
return(DateTime.Parse(
HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.NextVisibleTime),
System.Globalization.DateTimeFormatInfo.InvariantInfo,
System.Globalization.DateTimeStyles.AdjustToUniversal));
}
/// <summary>
/// Sets the SMB related file properties.
/// </summary>
/// <param name="response">The web response.</param>
/// <param name="properties">The properties to modify.</param>
public static void UpdateSmbProperties(HttpResponseMessage response, FileDirectoryProperties properties)
{
properties.filePermissionKey = HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FilePermissionKey);
properties.ntfsAttributes = CloudFileNtfsAttributesHelper.ToAttributes(HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FileAttributes));
properties.creationTime = DateTimeOffset.Parse(HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FileCreationTime));
properties.lastWriteTime = DateTimeOffset.Parse(HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FileLastWriteTime));
properties.ChangeTime = DateTimeOffset.Parse(HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FileChangeTime));
properties.DirectoryId = HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FileId);
properties.ParentId = HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.FileParentId);
properties.filePermissionKeyToSet = null;
properties.ntfsAttributesToSet = null;
properties.creationTimeToSet = null;
properties.lastWriteTimeToSet = null;
}
public static void BlobTypeHeader(HttpResponseMessage response, BlobType expectedValue)
{
Assert.IsNotNull(response);
string header = HttpResponseParsers.GetHeader(response, "x-ms-blob-type");
BlobType?parsed = null;
switch (header)
{
case "BlockBlob":
parsed = BlobType.BlockBlob;
break;
case "PageBlob":
parsed = BlobType.PageBlob;
break;
}
Assert.IsNotNull(parsed);
Assert.AreEqual(expectedValue, parsed);
}
internal static void ValidateCPKHeaders(HttpResponseMessage response, BlobRequestOptions options, bool upload)
{
if (options?.CustomerProvidedKey == null)
{
return;
}
BlobCustomerProvidedKey key = options.CustomerProvidedKey;
// Get ms-encryption-key-sha256 header from the response
string encryptionKeySHA256Hash = HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.ClientProvidedEncyptionKeyHash);
if (!string.Equals(key.KeySHA256, encryptionKeySHA256Hash, StringComparison.OrdinalIgnoreCase))
{
throw new StorageException(SR.ClientProvidedKeyBadHash);
}
// If this is an upload
if (upload)
{
// Get ms-request-server-encrypted header from the response
string serverRequestEncrypted = HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.ServerRequestEncrypted);
// If header != "true"
if (!string.Equals(Constants.HeaderConstants.TrueHeader, serverRequestEncrypted, StringComparison.OrdinalIgnoreCase))
{
throw new StorageException(SR.ClientProvidedKeyEncryptionFailure);
}
}
else
{
// Get ms-server-encrypted header
string serviceEncrypted = HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.ServerEncrypted);
// If header != "true"
if (!string.Equals(Constants.HeaderConstants.TrueHeader, serviceEncrypted, StringComparison.OrdinalIgnoreCase))
{
throw new StorageException(SR.ClientProvidedKeyEncryptionFailure);
}
}
}
public static void RequestIdHeader(HttpResponseMessage response)
{
Assert.IsNotNull(response);
Assert.IsNotNull(HttpResponseParsers.GetHeader(response, "x-ms-request-id"));
}
public static async Task <T> ExecuteAsync <T>(RESTCommand <T> cmd, IRetryPolicy policy, OperationContext operationContext, CancellationToken token)
{
// Note all code below will reference state, not params directly, this will allow common code with async executor
using (ExecutionState <T> executionState = new ExecutionState <T>(cmd, policy, operationContext))
using (CancellationTokenSource timeoutTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token))
{
bool shouldRetry = false;
TimeSpan delay = TimeSpan.Zero;
// Create a new client
HttpClient client = cmd.HttpClient ?? HttpClientFactory.Instance;
do
{
try
{
executionState.Init();
// 0. Begin Request
Executor.StartRequestAttempt(executionState);
// Steps 1-4: Build Content/SetHeaders/
Executor.ProcessStartOfRequest(executionState, SR.TraceStartRequestAsync, timeoutTokenSource);
Executor.CheckTimeout <T>(executionState, true);
}
catch (Exception ex)
{
Logger.LogError(executionState.OperationContext, SR.TraceInitRequestError, ex.Message);
// Store exception and throw here. All operations in this try would be non-retryable by default. At this point, the request is not even made.
// Therefore, we will not get extended error info. Hence ParseError doesn't matter here.
StorageException storageEx = await ExecutorBase.TranslateExceptionBasedOnParseErrorAsync(ex, executionState.Cmd.CurrentResult, executionState.Resp, executionState.Cmd.ParseErrorAsync, token).ConfigureAwait(false);
storageEx.IsRetryable = false;
executionState.ExceptionRef = storageEx;
throw executionState.ExceptionRef;
}
// Enter Retryable Section of execution
try
{
// Send Request
executionState.CurrentOperation = ExecutorOperation.BeginGetResponse;
Logger.LogInformational(executionState.OperationContext, SR.TraceGetResponse);
executionState.Resp = await client.SendAsync(executionState.Req, HttpCompletionOption.ResponseHeadersRead, timeoutTokenSource.Token).ConfigureAwait(false);
executionState.CurrentOperation = ExecutorOperation.EndGetResponse;
// Check that echoed client ID matches the one we sent
var clientRequestId = HttpRequestParsers.GetHeader(executionState.Req, Constants.HeaderConstants.ClientRequestIdHeader);
var echoedClientRequestId = HttpResponseParsers.GetHeader(executionState.Resp, Constants.HeaderConstants.ClientRequestIdHeader);
if (echoedClientRequestId != null && echoedClientRequestId != clientRequestId)
{
var requestId = HttpResponseParsers.GetHeader(executionState.Resp, Constants.HeaderConstants.RequestIdHeader);
var storageEx = new StorageException($"Echoed client request ID: {echoedClientRequestId} does not match sent client request ID: {clientRequestId}. Service request ID: {requestId}")
{
IsRetryable = false
};
executionState.ExceptionRef = storageEx;
throw storageEx;
}
// Since HttpClient wont throw for non success, manually check and populate an exception
if (!executionState.Resp.IsSuccessStatusCode)
{
// At this point, don't try to read the stream to parse the error
executionState.ExceptionRef = await Exceptions.PopulateStorageExceptionFromHttpResponseMessage(executionState.Resp, executionState.Cmd.CurrentResult, token, executionState.Cmd.ParseErrorAsync).ConfigureAwait(false);
}
Logger.LogInformational(executionState.OperationContext, SR.TraceResponse, executionState.Cmd.CurrentResult.HttpStatusCode, executionState.Cmd.CurrentResult.ServiceRequestID, executionState.Cmd.CurrentResult.ContentMd5, executionState.Cmd.CurrentResult.ContentCrc64, executionState.Cmd.CurrentResult.Etag);
Executor.FireResponseReceived(executionState);
// 7. Do Response parsing (headers etc, no stream available here)
if (cmd.PreProcessResponse != null)
{
executionState.CurrentOperation = ExecutorOperation.PreProcess;
try
{
executionState.Result = cmd.PreProcessResponse(cmd, executionState.Resp, executionState.ExceptionRef, executionState.OperationContext);
// clear exception
executionState.ExceptionRef = null;
}
catch (Exception ex)
{
executionState.ExceptionRef = ex;
}
Logger.LogInformational(executionState.OperationContext, SR.TracePreProcessDone);
}
// 8. (Potentially reads stream from server)
executionState.CurrentOperation = ExecutorOperation.GetResponseStream;
var responseStream = await executionState.Resp.Content.ReadAsStreamAsync().ConfigureAwait(false);
if (cmd.NetworkTimeout.HasValue)
{
responseStream = new TimeoutStream(responseStream, cmd.NetworkTimeout.Value);
}
cmd.ResponseStream = responseStream;
// The stream is now available in ResponseStream. Use the stream to parse out the response or error
if (executionState.ExceptionRef != null)
{
executionState.CurrentOperation = ExecutorOperation.BeginDownloadResponse;
Logger.LogInformational(executionState.OperationContext, SR.TraceDownloadError);
try
{
cmd.ErrorStream = new MemoryStream();
await cmd.ResponseStream.WriteToAsync(cmd.ErrorStream, default(IBufferManager), null /* copyLength */, null /* maxLength */, ChecksumRequested.None, executionState, new StreamDescriptor(), timeoutTokenSource.Token).ConfigureAwait(false);
cmd.ErrorStream.Seek(0, SeekOrigin.Begin);
executionState.ExceptionRef = StorageException.TranslateExceptionWithPreBufferedStream(executionState.ExceptionRef, executionState.Cmd.CurrentResult, stream => executionState.Cmd.ParseError(stream, executionState.Resp, null), cmd.ErrorStream, executionState.Resp);
throw executionState.ExceptionRef;
}
finally
{
cmd.ResponseStream.Dispose();
cmd.ResponseStream = null;
cmd.ErrorStream.Dispose();
cmd.ErrorStream = null;
}
}
else
{
if (!cmd.RetrieveResponseStream)
{
cmd.DestinationStream = Stream.Null;
}
if (cmd.DestinationStream != null)
{
if (cmd.StreamCopyState == null)
{
cmd.StreamCopyState = new StreamDescriptor();
}
try
{
executionState.CurrentOperation = ExecutorOperation.BeginDownloadResponse;
Logger.LogInformational(executionState.OperationContext, SR.TraceDownload);
await cmd.ResponseStream.WriteToAsync(cmd.DestinationStream, default(IBufferManager), null /* copyLength */, null /* maxLength */, cmd.ChecksumRequestedForResponseStream, executionState, cmd.StreamCopyState, timeoutTokenSource.Token).ConfigureAwait(false);
}
finally
{
cmd.ResponseStream.Dispose();
cmd.ResponseStream = null;
}
}
}
await Executor.ProcessEndOfRequestAsync(executionState, token).ConfigureAwait(false);
Executor.FinishRequestAttempt(executionState);
return(executionState.Result);
}
catch (Exception e)
{
Logger.LogWarning(executionState.OperationContext, SR.TraceGenericError, e.Message);
Executor.FinishRequestAttempt(executionState);
if (e is OperationCanceledException && (executionState.OperationExpiryTime.HasValue && DateTime.Now.CompareTo(executionState.OperationExpiryTime.Value) > 0))
{
e = new TimeoutException(SR.TimeoutExceptionMessage, e);
}
StorageException translatedException = await ExecutorBase.TranslateExceptionBasedOnParseErrorAsync(e, executionState.Cmd.CurrentResult, executionState.Resp, executionState.Cmd.ParseErrorAsync, token).ConfigureAwait(false);
executionState.ExceptionRef = translatedException;
Logger.LogInformational(executionState.OperationContext, SR.TraceRetryCheck, executionState.RetryCount, executionState.Cmd.CurrentResult.HttpStatusCode, translatedException.IsRetryable ? "yes" : "no", translatedException.Message);
shouldRetry = false;
if (translatedException.IsRetryable && (executionState.RetryPolicy != null))
{
executionState.CurrentLocation = Executor.GetNextLocation(executionState.CurrentLocation, cmd.LocationMode);
Logger.LogInformational(executionState.OperationContext, SR.TraceNextLocation, executionState.CurrentLocation);
IExtendedRetryPolicy extendedRetryPolicy = executionState.RetryPolicy as IExtendedRetryPolicy;
if (extendedRetryPolicy != null)
{
RetryContext retryContext = new RetryContext(
executionState.RetryCount++,
cmd.CurrentResult,
executionState.CurrentLocation,
cmd.LocationMode);
RetryInfo retryInfo = extendedRetryPolicy.Evaluate(retryContext, executionState.OperationContext);
if (retryInfo != null)
{
Logger.LogInformational(executionState.OperationContext, SR.TraceRetryInfo, retryInfo.TargetLocation, retryInfo.UpdatedLocationMode);
shouldRetry = true;
executionState.CurrentLocation = retryInfo.TargetLocation;
cmd.LocationMode = retryInfo.UpdatedLocationMode;
delay = retryInfo.RetryInterval;
}
}
else
{
shouldRetry = executionState.RetryPolicy.ShouldRetry(
executionState.RetryCount++,
cmd.CurrentResult.HttpStatusCode,
executionState.ExceptionRef,
out delay,
executionState.OperationContext);
}
if ((delay < TimeSpan.Zero) || (delay > Constants.MaximumRetryBackoff))
{
delay = Constants.MaximumRetryBackoff;
}
}
}
finally
{
if (executionState.Resp != null)
{
executionState.Resp.Dispose();
executionState.Resp = null;
}
}
// potentially backoff
if (!shouldRetry || (executionState.OperationExpiryTime.HasValue && (DateTime.Now + delay).CompareTo(executionState.OperationExpiryTime.Value) > 0))
{
Logger.LogError(executionState.OperationContext, shouldRetry ? SR.TraceRetryDecisionTimeout : SR.TraceRetryDecisionPolicy, executionState.ExceptionRef.Message);
throw executionState.ExceptionRef;
}
else
{
// I.E. Rewind stream etc.
cmd.RecoveryAction?.Invoke(cmd, executionState.Cmd.CurrentResult.Exception, executionState.OperationContext);
if (delay > TimeSpan.Zero)
{
await Task.Delay(delay, token).ConfigureAwait(false);
}
Logger.LogInformational(executionState.OperationContext, SR.TraceRetry);
}
Executor.FireRetrying(executionState);
}while (shouldRetry);
// should never get here
throw new NotImplementedException(SR.InternalStorageError);
}
}
/// <summary>
/// Extracts the pop receipt from a web response header.
/// </summary>
/// <param name="response">The web response.</param>
/// <returns>The pop receipt stored in the header of the response.</returns>
public static string GetPopReceipt(HttpResponseMessage response)
{
CommonUtility.AssertNotNull("response", response);
return(HttpResponseParsers.GetHeader(response, Constants.HeaderConstants.PopReceipt));
}
private async static Task <T> ExecuteAsyncInternal <T>(RESTCommand <T> cmd, IRetryPolicy policy, OperationContext operationContext, CancellationToken token)
{
// Note all code below will reference state, not params directly, this will allow common code with multiple executors (APM, Sync, Async)
using (ExecutionState <T> executionState = new ExecutionState <T>(cmd, policy, operationContext))
using (CancellationTokenSource timeoutTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token))
{
bool shouldRetry = false;
TimeSpan delay = TimeSpan.Zero;
// Note - The service accepts both api-version and x-ms-version and therefore it is ok to add x-ms-version to all requests.
// Create a new client
HttpClient client = cmd.HttpClient ?? HttpClientFactory.Instance;
do
{
try
{
executionState.Init();
// 0. Begin Request
Executor.StartRequestAttempt(executionState);
// 1. Build request and content
executionState.CurrentOperation = ExecutorOperation.BeginOperation;
// Content is re-created every retry, as HttpClient disposes it after a successful request
HttpContent content = cmd.BuildContent != null?cmd.BuildContent(cmd, executionState.OperationContext) : null;
// This is so the old auth header etc is cleared out, the content is where serialization occurs which is the major perf hit
Uri uri = cmd.StorageUri.GetUri(executionState.CurrentLocation);
Uri transformedUri = cmd.Credentials.TransformUri(uri);
Logger.LogInformational(executionState.OperationContext, SR.TraceStartRequestAsync, transformedUri);
UriQueryBuilder builder = new UriQueryBuilder(executionState.RestCMD.Builder);
executionState.Req = cmd.BuildRequest(cmd, transformedUri, builder, content, cmd.ServerTimeoutInSeconds, executionState.OperationContext);
// 2. Set Headers
Executor.ApplyUserHeaders(executionState);
// Let the user know we are ready to send
Executor.FireSendingRequest(executionState);
// 3. Sign Request is not needed, as HttpClient will call us
// 4. Set timeout
if (executionState.OperationExpiryTime.HasValue)
{
// set the token to cancel after timing out, if the higher token hasn't already been cancelled
timeoutTokenSource.CancelAfter(executionState.RemainingTimeout);
}
else
{
// effectively prevent timeout
timeoutTokenSource.CancelAfter(int.MaxValue);
}
Executor.CheckTimeout <T>(executionState, true);
}
catch (Exception ex)
{
Logger.LogError(executionState.OperationContext, SR.TraceInitRequestError, ex.Message);
// Store exception and throw here. All operations in this try would be non-retryable by default
StorageException storageEx = await StorageException.TranslateExceptionAsync(ex, executionState.Cmd.CurrentResult, null, timeoutTokenSource.Token, executionState.Resp).ConfigureAwait(false);
storageEx.IsRetryable = false;
executionState.ExceptionRef = storageEx;
throw executionState.ExceptionRef;
}
// Enter Retryable Section of execution
try
{
// Send Request
executionState.CurrentOperation = ExecutorOperation.BeginGetResponse;
Logger.LogInformational(executionState.OperationContext, SR.TraceGetResponse);
executionState.Resp = await client.SendAsync(executionState.Req, HttpCompletionOption.ResponseHeadersRead, timeoutTokenSource.Token).ConfigureAwait(false);
executionState.CurrentOperation = ExecutorOperation.EndGetResponse;
// Check that echoed client ID matches the one we sent
var clientRequestId = HttpRequestParsers.GetHeader(executionState.Req, Constants.HeaderConstants.ClientRequestIdHeader);
var echoedClientRequestId = HttpResponseParsers.GetHeader(executionState.Resp, Constants.HeaderConstants.ClientRequestIdHeader);
if (echoedClientRequestId != null && echoedClientRequestId != clientRequestId)
{
var requestId = HttpResponseParsers.GetHeader(executionState.Resp, Constants.HeaderConstants.RequestIdHeader);
var storageEx = new StorageException($"Echoed client request ID: {echoedClientRequestId} does not match sent client request ID: {clientRequestId}. Service request ID: {requestId}")
{
IsRetryable = false
};
executionState.ExceptionRef = storageEx;
throw storageEx;
}
// Since HttpClient wont throw for non success, manually check and populate an exception
if (!executionState.Resp.IsSuccessStatusCode)
{
// At this point, don't try to read the stream to parse the error
executionState.ExceptionRef = await Exceptions.PopulateStorageExceptionFromHttpResponseMessage(executionState.Resp, executionState.Cmd.CurrentResult, executionState.Cmd.ParseError).ConfigureAwait(false);
}
Logger.LogInformational(executionState.OperationContext, SR.TraceResponse, executionState.Cmd.CurrentResult.HttpStatusCode, executionState.Cmd.CurrentResult.ServiceRequestID, executionState.Cmd.CurrentResult.ContentMd5, executionState.Cmd.CurrentResult.ContentCrc64, executionState.Cmd.CurrentResult.Etag);
Executor.FireResponseReceived(executionState);
// 7. Do Response parsing (headers etc, no stream available here)
if (cmd.PreProcessResponse != null)
{
executionState.CurrentOperation = ExecutorOperation.PreProcess;
try
{
executionState.Result = cmd.PreProcessResponse(cmd, executionState.Resp, executionState.ExceptionRef, executionState.OperationContext);
// clear exception
executionState.ExceptionRef = null;
}
catch (Exception ex)
{
executionState.ExceptionRef = ex;
}
Logger.LogInformational(executionState.OperationContext, SR.TracePreProcessDone);
}
// 8. (Potentially reads stream from server)
executionState.CurrentOperation = ExecutorOperation.GetResponseStream;
var responseStream = await executionState.Resp.Content.ReadAsStreamAsync().ConfigureAwait(false);
if (cmd.NetworkTimeout.HasValue)
{
responseStream = new TimeoutStream(responseStream, cmd.NetworkTimeout.Value);
}
cmd.ResponseStream = responseStream;
// The stream is now available in ResponseStream. Use the stream to parse out the response or error
if (executionState.ExceptionRef != null)
{
executionState.CurrentOperation = ExecutorOperation.BeginDownloadResponse;
Logger.LogInformational(executionState.OperationContext, SR.TraceDownloadError);
try
{
cmd.ErrorStream = new MemoryStream();
await cmd.ResponseStream.WriteToAsync(cmd.ErrorStream, default(IBufferManager), null /* copyLength */, null /* maxLength */, ChecksumRequested.None, executionState, new StreamDescriptor(), timeoutTokenSource.Token).ConfigureAwait(false);
cmd.ErrorStream.Seek(0, SeekOrigin.Begin);
executionState.ExceptionRef = StorageException.TranslateExceptionWithPreBufferedStream(executionState.ExceptionRef, executionState.Cmd.CurrentResult, stream => executionState.Cmd.ParseError(stream, executionState.Resp, null), cmd.ErrorStream, executionState.Resp);
throw executionState.ExceptionRef;
}
finally
{
cmd.ResponseStream.Dispose();
cmd.ResponseStream = null;
cmd.ErrorStream.Dispose();
cmd.ErrorStream = null;
}
}
else
{
if (!cmd.RetrieveResponseStream)
{
cmd.DestinationStream = Stream.Null;
}
if (cmd.DestinationStream != null)
{
if (cmd.StreamCopyState == null)
{
cmd.StreamCopyState = new StreamDescriptor();
}
try
{
executionState.CurrentOperation = ExecutorOperation.BeginDownloadResponse;
Logger.LogInformational(executionState.OperationContext, SR.TraceDownload);
await cmd.ResponseStream.WriteToAsync(cmd.DestinationStream, default(IBufferManager), null /* copyLength */, null /* maxLength */, cmd.ChecksumRequestedForResponseStream, executionState, cmd.StreamCopyState, timeoutTokenSource.Token).ConfigureAwait(false);
}
finally
{
cmd.ResponseStream.Dispose();
cmd.ResponseStream = null;
}
}
}
// 9. Evaluate Response & Parse Results, (Stream potentially available here)
if (cmd.PostProcessResponseAsync != null)
{
executionState.CurrentOperation = ExecutorOperation.PostProcess;
Logger.LogInformational(executionState.OperationContext, SR.TracePostProcess);
executionState.Result = await cmd.PostProcessResponseAsync(cmd, executionState.Resp, executionState.OperationContext, timeoutTokenSource.Token).ConfigureAwait(false);
}
executionState.CurrentOperation = ExecutorOperation.EndOperation;
Logger.LogInformational(executionState.OperationContext, SR.TraceSuccess);
Executor.FinishRequestAttempt(executionState);
return(executionState.Result);
}
catch (Exception e)
{
Logger.LogWarning(executionState.OperationContext, SR.TraceGenericError, e.Message);
Executor.FinishRequestAttempt(executionState);
if (e is TaskCanceledException && (executionState.OperationExpiryTime.HasValue && DateTime.Now.CompareTo(executionState.OperationExpiryTime.Value) > 0))
{
e = new TimeoutException(SR.TimeoutExceptionMessage, e);
}
#if NETCORE || WINDOWS_RT
StorageException translatedException = StorageException.TranslateException(e, executionState.Cmd.CurrentResult, stream => executionState.Cmd.ParseError(stream, executionState.Resp, null), executionState.Resp);
#else
StorageException translatedException = StorageException.TranslateException(e, executionState.Cmd.CurrentResult, stream => executionState.Cmd.ParseError(stream, executionState.Resp, null));
#endif
executionState.ExceptionRef = translatedException;
Logger.LogInformational(executionState.OperationContext, SR.TraceRetryCheck, executionState.RetryCount, executionState.Cmd.CurrentResult.HttpStatusCode, translatedException.IsRetryable ? "yes" : "no", translatedException.Message);
shouldRetry = false;
if (translatedException.IsRetryable && (executionState.RetryPolicy != null))
{
executionState.CurrentLocation = Executor.GetNextLocation(executionState.CurrentLocation, cmd.LocationMode);
Logger.LogInformational(executionState.OperationContext, SR.TraceNextLocation, executionState.CurrentLocation);
IExtendedRetryPolicy extendedRetryPolicy = executionState.RetryPolicy as IExtendedRetryPolicy;
if (extendedRetryPolicy != null)
{
RetryContext retryContext = new RetryContext(
executionState.RetryCount++,
cmd.CurrentResult,
executionState.CurrentLocation,
cmd.LocationMode);
RetryInfo retryInfo = extendedRetryPolicy.Evaluate(retryContext, executionState.OperationContext);
if (retryInfo != null)
{
Logger.LogInformational(executionState.OperationContext, SR.TraceRetryInfo, retryInfo.TargetLocation, retryInfo.UpdatedLocationMode);
shouldRetry = true;
executionState.CurrentLocation = retryInfo.TargetLocation;
cmd.LocationMode = retryInfo.UpdatedLocationMode;
delay = retryInfo.RetryInterval;
}
}
else
{
shouldRetry = executionState.RetryPolicy.ShouldRetry(
executionState.RetryCount++,
cmd.CurrentResult.HttpStatusCode,
executionState.ExceptionRef,
out delay,
executionState.OperationContext);
}
if ((delay < TimeSpan.Zero) || (delay > Constants.MaximumRetryBackoff))
{
delay = Constants.MaximumRetryBackoff;
}
}
}
finally
{
if (executionState.Resp != null)
{
executionState.Resp.Dispose();
executionState.Resp = null;
}
}
// potentially backoff
if (!shouldRetry || (executionState.OperationExpiryTime.HasValue && (DateTime.Now + delay).CompareTo(executionState.OperationExpiryTime.Value) > 0))
{
Logger.LogError(executionState.OperationContext, shouldRetry ? SR.TraceRetryDecisionTimeout : SR.TraceRetryDecisionPolicy, executionState.ExceptionRef.Message);
throw executionState.ExceptionRef;
}
else
{
if (cmd.RecoveryAction != null)
{
// I.E. Rewind stream etc.
cmd.RecoveryAction(cmd, executionState.Cmd.CurrentResult.Exception, executionState.OperationContext);
}
if (delay > TimeSpan.Zero)
{
await Task.Delay(delay, token).ConfigureAwait(false);
}
Logger.LogInformational(executionState.OperationContext, SR.TraceRetry);
}
Executor.FireRetrying(executionState);
}while (shouldRetry);
// should never get here
throw new NotImplementedException(SR.InternalStorageError);
}
}