topic .net core alternative for handling proxy requests in ArcGIS JavaScript Maps SDK Questions

.net core alternative for handling proxy requests

YashvitNaik — Thu, 23 Feb 2023 09:12:04 GMT

I'm migrating a web application which was designed in the .net framework GIS to .net core. and currently am on ArcGIS Javascript API 4.23.

In the .net framework application, I'm using the proxy.ashx (https://github.com/Esri/resource-proxy/tree/master/DotNet), to handle the proxy requests but this proxy handler is not compatible with .net core.

I tried https://www.nuget.org/packages/EsriArcgis.Proxy.Core but it doesn't support token authentication. I have to predefine the authentication config in the proxy.config.json file but that is not possible with our application.

Is there a solution for getting around this, I need to use a proxy as am not certain if the servers I am accessing will be CORS enabled.

Re: .net core alternative for handling proxy requests

LaurenBoyd — Thu, 23 Feb 2023 17:47:32 GMT

Hi @YashvitNaik

Esri does not provide a proxy to bypass CORS and it's not recommended to use the Esri resource proxy on Github since it's no longer maintained. In the best practices, it's noted to:

Enable CORS on the non-CORS enabled web server.
Use API keys to use services and access private content.
Configure your security settings in ArcGIS Online or ArcGIS Enterprise.
Access secure services using ArcGIS Online to store your username/password credentials.

If a proxy is absolutely needed to get around CORS issues, you will need to create or find a third party proxy that you can use with your application and configure it as outlined here: https://developers.arcgis.com/javascript/latest/proxies/