topic Re: Access-Control-Allow-Origin and 3.0 in ArcGIS JavaScript Maps SDK Questions

Access-Control-Allow-Origin and 3.0

JohnCartwright — Wed, 20 Jun 2012 03:19:13 GMT

Hello All,

I'm finding that when using 3.0, I get the following error:

XMLHttpRequest cannot load http://server.arcgisonline.com/ArcGIS/rest/info?f=json. Origin http://localhost is not allowed by Access-Control-Allow-Origin.

Simply switching the API back to 2.8 eliminates the problem. I've tried configuring both CORS and the proxyUrl, but neither helps.

Can someone please provide me some guidance here?

Thanks!

--john

Re: Access-Control-Allow-Origin and 3.0

derekswingley1 — Wed, 20 Jun 2012 04:54:00 GMT

Hi John,

You can safely ignore these errors. There's info about this in the doc for esri.request (specifically, the bullet for 3.0).

Kelly also posted about this a couple of days ago: http://forums.arcgis.com/threads/59988-Issue-Upgrading-to-version-3.0?p=207055&viewfull=1#post207055

Re: Access-Control-Allow-Origin and 3.0

JohnCartwright — Wed, 20 Jun 2012 15:04:20 GMT

Thanks Derek, I had not seen Kelly's message on this topic. I'm surprised though that http://enable-cors.org/ reports that sservices.arcgisonline.com is a CORS-enabled site.

--john

Re: Access-Control-Allow-Origin and 3.0

derekswingley1 — Wed, 20 Jun 2012 15:39:27 GMT

Glad to help.

Attached is what I see when I used enable-cors.org to check if CORS is supported on services.arcgisonline.com. That server is not set up for CORS.

Re: Access-Control-Allow-Origin and 3.0

AaronConnolly — Mon, 04 Mar 2013 14:30:12 GMT

Ignoring this warning doesn't work if you call a buffer task:

http://forums.arcgis.com/threads/78905-GeometryServic-Buffer-Task-amp-Access-Control-Allow-Origin?p=277900#post277900

Why would this happen with a geometry service? I'm running API version 3.2.