Kluge new attributes into map service (SOI)

[JamesCrandall]

I started with an SOI project and attempting to create an interceptor that will take the contents of a map service (layer 1) and kludge some new attributes from some other JSON I have pulled in another request.  

Which sample would be closest to what I'd like to attempt?

This YouTube Video is doing what I'd like but is in Java and not C# and I'm having difficulty understanding.

I have a simple SOI.sln setup and just starting to try and fill in the correct areas.

public byte[] HandleRESTRequest(string Capabilities, string resourceName, string operationName,
            string operationInput, string outputFormat, string requestProperties, out string responseProperties)
        {
            responseProperties = null;
            _serverLog.LogMessage(ServerLogger.msgType.infoStandard, _soiName + ".HandleRESTRequest()",
                200, "Request received in Sample Object Interceptor for handleRESTRequest");

            /*
            * Add code to manipulate REST requests here                          
            * https://somearcgisserver.com/somesite/rest/services/test/ServiceNameHere/MapServer/1
            * https://some3rdpartyapi.com/v1/realtime
            */

            

            // Find the correct delegate to forward the request too
            IRESTRequestHandler restRequestHandler = FindRequestHandlerDelegate<IRESTRequestHandler>();
            if (restRequestHandler == null)
                return null;

            var response = restRequestHandler.HandleRESTRequest(
                       Capabilities, resourceName, operationName, operationInput,
                       outputFormat, requestProperties, out responseProperties);

            //I think I need to add something here to grab the existing JSON of the mapservice and then kludge the desired attributes into it
            if (operationName.Equals("query") && resourceName.Equals("layers/1"))
            {
                //access the JSON of the map service here
                //access the JSON of the 3rd party rest service result
                //kludge the two together on the common attribute they share
            }

            return response;

            //return restRequestHandler.HandleRESTRequest(
            //        Capabilities, resourceName, operationName, operationInput,
            //        outputFormat, requestProperties, out responseProperties);
        }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[nicogis]

with json.net you can write similar code

async Task Main()
{
	var httpClient = new HttpClient();
	var response = await httpClient.GetAsync($"https://.../MapServer/0/query?where=&text=&objectIds=1%2C2%2C4&time=&geometry=&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&outFields=*&returnGeometry=true&returnTrueCurves=false&maxAllowableOffset=&geometryPrecision=&outSR=&having=&returnIdsOnly=false&returnCountOnly=false&orderByFields=&groupByFieldsForStatistics=&outStatistics=&returnZ=false&returnM=false&gdbVersion=&historicMoment=&returnDistinctValues=false&resultOffset=&resultRecordCount=&queryByDistance=&returnExtentOnly=false&datumTransformation=&parameterValues=&rangeValues=&quantizationParameters=&f=json");
	var r = await response.Content.ReadAsStringAsync();
    
	
	JObject j = JObject.Parse(r);
	
	JObject alias = (JObject)j["fieldAliases"];
	alias.Add("NewField1", new JValue("NewField 1"));
	JArray items = (JArray)j["fields"];
	items.Add(new JObject()
			{
				{ "name", "NewField1" },
				{ "type", "esriFieldTypeString"},
				{ "alias", "NewField 1" },
				{ "length", 25 }

			});

	JArray features = (JArray)j["features"];
    
	foreach (var element in features)
	{
		//if objectid is 1 field NewField1 add value NewValue
		if ((int)element["attributes"]["OID"] == 1)
		{
			element["attributes"]["NewField1"] = "NewValue";
		}
		....
	}

	
	j.ToString().Dump();

}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[JamesCrandall]

ah ha!  A response!  

Thank you a bunch, I've been looking forward to returning to this asap and this looks promising.