public void OnForwarderFailed(DateTime timestamp, ForwarderError error)
{
var metrics = PerRequestMetrics.Current;
metrics.ProxyStopOffset = metrics.CalcOffset(timestamp);
metrics.Error = error;
}
private HttpContext GetFailedRequestContext(ForwarderError error)
{
var errorFeature = new ForwarderErrorFeature(error, null);
var context = new DefaultHttpContext();
context.Features.Set <IForwarderErrorFeature>(errorFeature);
return(context);
}
private static string GetMessage(ForwarderError error)
{
return(error switch
{
ForwarderError.None => throw new NotSupportedException("A more specific error must be used"),
ForwarderError.Request => "An error was encountered before receiving a response.",
ForwarderError.RequestTimedOut => "The request timed out before receiving a response.",
ForwarderError.RequestCanceled => "The request was canceled before receiving a response.",
ForwarderError.RequestBodyCanceled => "Copying the request body was canceled.",
ForwarderError.RequestBodyClient => "The client reported an error when copying the request body.",
ForwarderError.RequestBodyDestination => "The destination reported an error when copying the request body.",
ForwarderError.ResponseBodyCanceled => "Copying the response body was canceled.",
ForwarderError.ResponseBodyClient => "The client reported an error when copying the response body.",
ForwarderError.ResponseBodyDestination => "The destination reported an error when copying the response body.",
ForwarderError.ResponseHeaders => "The destination returned a response that cannot be proxied back to the client.",
ForwarderError.UpgradeRequestCanceled => "Copying the upgraded request body was canceled.",
ForwarderError.UpgradeRequestClient => "The client reported an error when copying the upgraded request body.",
ForwarderError.UpgradeRequestDestination => "The destination reported an error when copying the upgraded request body.",
ForwarderError.UpgradeResponseCanceled => "Copying the upgraded response body was canceled.",
ForwarderError.UpgradeResponseClient => "The client reported an error when copying the upgraded response body.",
ForwarderError.UpgradeResponseDestination => "The destination reported an error when copying the upgraded response body.",
ForwarderError.NoAvailableDestinations => throw new NotImplementedException(), // Not used in this class
_ => throw new NotImplementedException(error.ToString()),
});
public void OnForwarderFailed(DateTime timestamp, ForwarderError error)
{
var metrics = PerRequestMetrics.Current;
metrics.Error = error;
}
public static void ErrorProxying(ILogger logger, ForwarderError error, Exception ex)
{
_proxyError(logger, error, GetMessage(error), ex);
}
private void ReportProxyError(HttpContext context, ForwarderError error, Exception ex)
{
context.Features.Set <IForwarderErrorFeature>(new ForwarderErrorFeature(error, ex));
Log.ErrorProxying(_logger, error, ex);
ForwarderTelemetry.Log.ForwarderFailed(error);
}
internal ForwarderErrorFeature(ForwarderError error, Exception?ex)
{
Error = error;
Exception = ex;
}