/// <summary>
/// Processes HTTP redirects and reissues the call to the
/// redirected location.
/// </summary>
/// <param name="executionContext">The execution context, it contains the
/// request and response context.</param>
protected override void InvokeAsyncCallback(IAsyncExecutionContext executionContext)
{
var exception = executionContext.ResponseContext.AsyncResult.Exception;
if (exception != null)
{
var webException = exception as WebException;
var httpException = exception as HttpErrorResponseException;
if (webException == null && httpException != null)
{
webException = httpException.InnerException as WebException;
}
if (webException != null)
{
// Call InvokeAsync to redirect to new location.
if (HandleRedirect(ExecutionContext.CreateFromAsyncContext(executionContext), webException))
{
executionContext.ResponseContext.AsyncResult.Exception = null;
RetryHandler.PrepareForRetry(executionContext.RequestContext);
base.InvokeAsync(executionContext);
return;
}
}
}
// Not a redirect, call outer callbacks to continue processing response.
base.InvokeAsyncCallback(executionContext);
}
protected virtual void FinalizeForRedirect(IExecutionContext executionContext, string redirectedLocation)
{
Logger.InfoFormat("Request {0} is being redirected to {1}.", executionContext.RequestContext.RequestName, redirectedLocation);
Uri uri = new Uri(redirectedLocation);
executionContext.RequestContext.Request.Endpoint = new UriBuilder(uri.Scheme, uri.Host).Uri;
RetryHandler.PrepareForRetry(executionContext.RequestContext);
}
protected virtual void FinalizeForRedirect(IExecutionContext executionContext, string redirectedLocation)
{
this.Logger.InfoFormat("Request {0} is being redirected to {1}.",
executionContext.RequestContext.RequestName,
redirectedLocation);
var uri = new Uri(redirectedLocation);
var requestContext = executionContext.RequestContext;
if (uri.IsDefaultPort)
{
requestContext.Request.Endpoint = new UriBuilder(uri.Scheme, uri.Host).Uri;
}
else
{
requestContext.Request.Endpoint = new UriBuilder(uri.Scheme, uri.Host, uri.Port).Uri;
}
RetryHandler.PrepareForRetry(executionContext.RequestContext);
}
/// <summary>
/// Processes HTTP redirects and reissues the call to the
/// redirected location.
/// </summary>
/// <typeparam name="T">The response type for the current request.</typeparam>
/// <param name="executionContext">The execution context, it contains the
/// request and response context.</param>
/// <returns>A task that represents the asynchronous operation.</returns>
public override async System.Threading.Tasks.Task <T> InvokeAsync <T>(IExecutionContext executionContext)
{
var isRedirect = false;
do
{
try
{
return(await base.InvokeAsync <T>(executionContext));
}
catch (WebException exception)
{
isRedirect = HandleRedirect(executionContext, exception);
if (!isRedirect)
{
throw;
}
}
catch (HttpErrorResponseException httpException)
{
var webException = httpException.InnerException as WebException;
if (webException != null)
{
isRedirect = HandleRedirect(executionContext, webException);
if (!isRedirect)
{
throw;
}
}
else
{
throw;
}
}
RetryHandler.PrepareForRetry(executionContext.RequestContext);
} while (isRedirect);
throw new AmazonClientException("Neither a response was returned nor an exception was thrown in the Runtime RedirectHandler.");
}
/// <summary>
/// Processes HTTP redirects and reissues the call to the
/// redirected location.
/// </summary>
/// <param name="executionContext">The execution context which contains both the
/// requests and response context.</param>
public override void InvokeSync(IExecutionContext executionContext)
{
var isRedirect = false;
do
{
try
{
base.InvokeSync(executionContext);
return;
}
catch (WebException exception)
{
isRedirect = HandleRedirect(executionContext, exception);
if (!isRedirect)
{
throw;
}
}
catch (HttpErrorResponseException httpException)
{
var webException = httpException.InnerException as WebException;
if (webException != null)
{
isRedirect = HandleRedirect(executionContext, webException);
if (!isRedirect)
{
throw;
}
}
else
{
throw;
}
}
RetryHandler.PrepareForRetry(executionContext.RequestContext);
} while (isRedirect);
}
