hi

Thanks for contacting us. I will put you in direct contact with the Ge support.

Regards,

Miguel

El 09/06/2015 a las 11:38, Sergio Casas escribió:
Hi,

I am working on a FIWARE project using the XML3D GE.

I am trying to load an external model using the MODEL tag:

<group style="transform: translate3d(0px,0px,0px)" >
<model src="http://server1.uv.es/FIWARE/Assets/Models/Axes/Axes.xml#Axes"></model>
</group>

I am not using FILAB yet.
I am using a local WAMP server where I store the .html code that makes use of the XML3D GE. The external machine (server1.uv.es<http://server1.uv.es>) is a different machine with another webserver.

However. It does not work, because of Access-Control restrictions. This is the Chrome console message that I get:

XMLHttpRequest cannot load http://server1.uv.es/FIWARE/Assets/Models/Axes/Axes.xml. No 'Access-Control-Allow-Origin' header is present on the requested resource.

I was wondering if I need to add something to the document for that to work.

It works like a charm when you load models without using an external URL.
I just would like to use also external URLs

The funny part is that I load the XML3D from an external URL, and that's OK for the browser:

<script type="text/javascript" src="http://www.xml3d.org/xml3d/script/xml3d.js"></script>

I just don't know why an XML model is different...

I am sure it is possible to load external URLs.
I just would like to know how.

Thanks in advance!

Hi,

This is due to the security measures built in to WebGL. A Web site has
to explicitly allow its content to be accessible from other sites.
Otherwise it will be blocked. You need to configure your Web server to
include the relevant headers in the HTTP response
(Access-Control-Allow-Origin: *). For details please search Google for
"WebGL" and "CORS".

This should already be docuemnted for XML3D, btw.

Hope this helps. Let us know if you need more help here.

Best,

Philipp

–

-------------------------------------------------------------------------
Deutsches Forschungszentrum für Künstliche Intelligenz (DFKI) GmbH
Trippstadter Strasse 122, D-67663 Kaiserslautern

Geschäftsführung:
Prof. Dr. Dr. h.c. mult. Wolfgang Wahlster (Vorsitzender)
Dr. Walter Olthoff
Vorsitzender des Aufsichtsrats:
Prof. Dr. h.c. Hans A. Aukes

Sitz der Gesellschaft: Kaiserslautern (HRB 2313)
USt-Id.Nr.: DE 148646973, Steuernummer: 19/673/0060/3
---------------------------------------------------------------------------

_______________________________________________
Fiware-tech-help mailing list
Fiware-tech-help@lists.fi-ware.org
https://lists.fi-ware.org/listinfo/fiware-tech-help

Hi,

exactly as Philipp pointed out, this is because AJAX requests used by
JavaScript (and actually used in xml3d.js to request external resources)
do have stricter restrictions when it comes to accessing external
resources than HTML 'internal' requests, as for example including
JavaScripts or CSS files. This is also while for example including
xml3d.js from the public location works, whereas the request for the
model file does not.

The solution is to configure the Web server that serves the model file
to add an access control header to the reply that contains the requested
document.

A good entry point to further links related to the topic of CORS (cross
origin resource sharing) and solution of your issue is for example the
respective Wikipedia article:
http://en.wikipedia.org/wiki/Cross-origin_resource_sharing

Best,
Torsten

PS: Second reply to topic to include Sergio into list of recipients

–
Torsten Spieldenner, M.Sc.

Tel.: +49 6 81 / 8 57 75 - 77 48
Fax.: +49 6 81 / 8 57 75 - 22 35

Internet: http://www.dfki.de/web/forschung/asr/

-------------------------------------------------------------
Deutsches Forschungszentrum fuer Kuenstliche Intelligenz GmbH
Trippstadter Strasse 122, D-67663 Kaiserslautern, Germany

Geschaeftsfuehrung:
Prof. Dr. Dr. h.c. mult. Wolfgang Wahlster (Vorsitzender)
Dr. Walter Olthoff

Vorsitzender des Aufsichtsrats:
Prof. Dr. h.c. Hans A. Aukes

Amtsgericht Kaiserslautern, HRB 2313
-------------------------------------------------------------