internal static async Task <bool> SharedRetryForExceptionAsync(Runtime.IExecutionContext executionContext, Exception exception,
Func <Runtime.IExecutionContext, Exception, bool?> retryForExceptionSync,
Func <Runtime.IExecutionContext, Exception, bool> baseRetryForException)
{
var syncResult = retryForExceptionSync(executionContext, exception);
if (syncResult.HasValue)
{
return(syncResult.Value);
}
else
{
var serviceException = exception as AmazonServiceException;
string correctedRegion = null;
AmazonS3Uri s3BucketUri;
if (AmazonS3Uri.TryParseAmazonS3Uri(executionContext.RequestContext.Request.Endpoint, out s3BucketUri))
{
var credentials = executionContext.RequestContext.ImmutableCredentials;
correctedRegion = await BucketRegionDetector.DetectMismatchWithHeadBucketFallbackAsync(s3BucketUri, serviceException, credentials).ConfigureAwait(false);
}
if (correctedRegion == null)
{
return(baseRetryForException(executionContext, exception));
}
else
{
// change authentication region of request and signal the handler to sign again with the new region
executionContext.RequestContext.Request.AuthenticationRegion = correctedRegion;
executionContext.RequestContext.IsSigned = false;
return(true);
}
}
}
/// <summary>
/// Return true if the request should be retried. Implements additional checks
/// specific to S3 on top of the checks in DefaultRetryPolicy.
/// </summary>
/// <param name="executionContext">Request context containing the state of the request.</param>
/// <param name="exception">The exception thrown by the previous request.</param>
/// <returns>Return true if the request should be retried.</returns>
public override bool RetryForException(Runtime.IExecutionContext executionContext, Exception exception)
{
var syncResult = RetryForExceptionSync(executionContext, exception);
if (syncResult.HasValue)
{
return(syncResult.Value);
}
else
{
var serviceException = exception as AmazonServiceException;
string correctedRegion = null;
AmazonS3Uri s3BucketUri;
if (AmazonS3Uri.TryParseAmazonS3Uri(executionContext.RequestContext.Request.Endpoint, out s3BucketUri))
{
var credentials = executionContext.RequestContext.ImmutableCredentials;
if (credentials != null)
{
correctedRegion = BucketRegionDetector.DetectMismatchWithHeadBucketFallback(s3BucketUri, serviceException, credentials);
}
}
if (correctedRegion == null)
{
return(base.RetryForException(executionContext, exception));
}
else
{
// change authentication region of request and signal the handler to sign again with the new region
executionContext.RequestContext.Request.AuthenticationRegion = correctedRegion;
executionContext.RequestContext.IsSigned = false;
return(true);
}
}
}