Why do I get uncompressed data ?

I am using the .NET SDK to make on demand extractions.

Because I set the AutomaticDecompression option to false, I would expect to receive compressed data (gzipped).

Instead :

1/ Without the "X-Direct-Download"
header:

- TimeAndSalesExtractionRequest : I receive
uncompressed data

- CorporateActionsStandardExtractionRequest : I receive
uncompressed data



2/ With the "X-Direct-Download" header:

- TimeAndSalesExtractionRequest : I receive gzipped
data (as expected)

- CorporateActionsStandardExtractionRequest : I receive
uncompressed data

Here is my code :

    public static class Cases
    {
        public static void Run()
        {
            Uri dssUri = new Uri("https://hosted.datascopeapi.reuters.com/RestApi/1/");
            string dssUserName = "myUsername";
            string dssUserPassword = "myPassword";


            ExtractionsContext extractionsContext = new ExtractionsContext(dssUri, dssUserName, dssUserPassword);
            //extractionsContext.DefaultRequestHeaders.Add("X-Direct-Download", "true");
            extractionsContext.Options.AutomaticDecompression = false;


            //-----------------------------------------------------------------
            //Define Extraction Request
            //-----------------------------------------------------------------
            ExtractionRequestBase extractionRequest = GetTimeAndSalesExtractionRequest();
            //ExtractionRequestBase extractionRequest = GetCorporateActionsStandardExtractionRequest();


            //-----------------------------------------------------------------
            //Extraction
            //NOTE: if the extraction request takes more than 30 seconds the async mechanism will be used,
            //the SDK handles this automatically for you.
            //-----------------------------------------------------------------
            RawExtractionResult extractionResult = extractionsContext.ExtractRaw(extractionRequest);


            //-----------------------------------------------------------------
            //Write data to file:
            //-----------------------------------------------------------------
            DssStreamResponse response = extractionsContext.GetReadStream(extractionResult);
            using (var fileStream = File.Create("data.csv.gz"))
            {
                response.Stream.CopyTo(fileStream);
            }
        }


        public static ExtractionRequestBase GetTimeAndSalesExtractionRequest()
        {
            var instru1 = InstrumentIdentifier.Create(IdentifierType.Ric, "SOGN.PA");
            var instru2 = InstrumentIdentifier.Create(IdentifierType.Ric, "BNPP.PA");
            var instru3 = InstrumentIdentifier.Create(IdentifierType.Ric, "CAGR.PA");
            var instru4 = InstrumentIdentifier.Create(IdentifierType.Ric, "HSBA.L");
            InstrumentIdentifier[] instrumentIdentifierArray = new InstrumentIdentifier[] { instru1, instru2, instru3, instru4 };


            string[] requestedFieldNames = {
                "Trade - Price", "Trade - Volume", "Trade - Qualifiers",
                "Quote - Bid Price", "Quote - Bid Size", "Quote - Number of Buyers",
                "Quote - Ask Price", "Quote - Ask Size", "Quote - Number of Sellers",
                "Auction - Price", "Auction - Volume"
            };


            TickHistoryTimeAndSalesCondition condition = new TickHistoryTimeAndSalesCondition
            {
                ReportDateRangeType = ReportDateRangeType.Range,
                QueryStartDate = new DateTimeOffset(2017, 01, 10, 6, 0, 0, TimeSpan.FromHours(0)),
                QueryEndDate = new DateTimeOffset(2017, 01, 10, 10, 0, 0, TimeSpan.FromHours(0)),
                ApplyCorrectionsAndCancellations = false,
                ExtractBy = TickHistoryExtractByMode.Ric,
                MessageTimeStampIn = TickHistoryTimeOptions.LocalExchangeTime,
                SortBy = TickHistorySort.SingleByTimestamp,
                DisplaySourceRIC = false
            };


            TickHistoryTimeAndSalesExtractionRequest extractionRequest = new TickHistoryTimeAndSalesExtractionRequest
            {
                IdentifierList = InstrumentIdentifierList.Create(instrumentIdentifierArray),
                ContentFieldNames = requestedFieldNames,
                Condition = condition
            };


            return extractionRequest;
        }


        public static ExtractionRequestBase GetCorporateActionsStandardExtractionRequest()
        {
            var instru1 = InstrumentIdentifier.Create(IdentifierType.Ric, "SOGN.PA");
            var instru2 = InstrumentIdentifier.Create(IdentifierType.Ric, "BNPP.PA");
            var instru3 = InstrumentIdentifier.Create(IdentifierType.Ric, "CAGR.PA");
            var instru4 = InstrumentIdentifier.Create(IdentifierType.Ric, "HSBA.L");
            InstrumentIdentifier[] instrumentIdentifierArray = new InstrumentIdentifier[] { instru1, instru2, instru3, instru4 };


            string[] requestedFieldNames = {
                "RIC", "Dividend Ex Date", "Dividend Rate", "Dividend Currency"
            };


            CorporateActionsStandardCondition condition = new CorporateActionsStandardCondition
            {
                PreviousDays = 90,
                ReportDateRangeType = ReportDateRangeType.Delta,
                CorporateActionsCapitalChangeType = CorporateActionsCapitalChangeType.CapitalChangeExDate,
                CorporateActionsDividendsType = CorporateActionsDividendsType.DividendPayDate,
                CorporateActionsEarningsType = CorporateActionsEarningsType.PeriodEndDate,
                CorporateActionsEquityOfferingsType = CorporateActionsEquityOfferingsType.AllPendingDeals,
                CorporateActionsMergersAcquisitionsType = CorporateActionsMergersAcquisitionsType.DealAnnouncementDate,
                CorporateActionsNominalValueType = CorporateActionsNominalValueType.NominalValueDate,
                CorporateActionsSharesType = CorporateActionsSharesType.SharesAmountDate,
                CorporateActionsStandardEventsType = CorporateActionsStandardEventsType.None,
                CorporateActionsVotingRightsType = CorporateActionsVotingRightsType.VotingRightsDate,
                QueryStartDate = null,
                NextDays = null,
                QueryEndDate = null,
                PendingEventsHours = null,
                PendingEventsMinutes = null,
                IncludeInstrumentsWithNoEvents = null,
                IncludeNullDates = null,
                ExcludeDeletedEvents = true,
                IncludeCapitalChangeEvents = true,
                IncludeDividendEvents = true,
                IncludeEarningsEvents = true,
                IncludeMergersAndAcquisitionsEvents = true,
                IncludeNominalValueEvents = true,
                IncludePublicEquityOfferingsEvents = true,
                IncludeSharesOutstandingEvents = true,
                IncludeVotingRightsEvents = true
            };


            CorporateActionsStandardExtractionRequest extractionRequest = new CorporateActionsStandardExtractionRequest
            {
                IdentifierList = InstrumentIdentifierList.Create(instrumentIdentifierArray),
                ContentFieldNames = requestedFieldNames,
                Condition = condition
            };


            return extractionRequest;
        }
    }