AnsweredAssumed Answered

the end of 2019 and still battling CORS issues

Question asked by amarsden on Nov 13, 2019
Latest reply on Nov 18, 2019 by amarsden

This is the error that never goes away and drives me nuts


The site is using the latest 3.x api


It does NOT use the proxy.aspx page


the server is , lets say "esri-gis1"


there is an internal site in the internal DSN, let's call that "maps"


users access the site by using "maps" as a URL


The code calls maps from esri-gis1\arcgis\rest\services......


The map page works fine.  Requests are fine and if I examine the response headers for the basic requests it shows * in the Allow-Control-Allow-Origin

The issues start when I call, for example I call the geometry service




In a task that I use to convert the local grid to Long Lat


Then I get the 


Access to XMLHttpRequest at 'http://esri-gis1/arcgis/rest/services/Utilities/Geometry/GeometryServer/project?.........' from origin 'http://maps' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.


I got around this on the current site by using the Proxy page and adding




But I ind the Proxy page adds more trouble than it solves.


Any help please?