CORS ArcGIS API for JavaScript renders layers using WebGL. WebGL requires access to the raw image data. The images must meet one of the following requirements:

         Be on the same domain as the application, or  Be hosted on a server that supports CORS, or. Use a proxy.

Our proxy server is written in node.js

    has its own proxy server running at for Secure Sockets Layer (SSL)

             Non Secure Sockets Layer runing at   


ESRI privide other version of proxy server,  such as ASP.NETJava/JSP,  PHP.  You can use as well for Arcgis Server that is not enabled for CORS.  



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