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Cross-domain request in Firefox to get DWA data into an OpenSocial gadget in RQM

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Leire Torres
(36●7●21) edited
Oct 01 '15, 11:29 a.m.
I am developing an OpenSocial gadget (JavaScript language) for RQM (Rational Quality Manager) that gets information from DWA (Doors Web Access). The gadget is running on RQM (https://:9443/) and I want to make request to the DWA (https://:8443/).

The gadget runs correctly in IE, but when I run in Firefox I get the following error: 

> Cross-Origin Request Blocked: The Same Origin Policy disallows reading
> the remote resource at https://<host>:8443/xxxx. (Reason: CORS header
> 'Access-Control-Allow-Origin' missing). <unknown> Cross-Origin Request
> Blocked: The Same Origin Policy disallows reading the remote resource
> at https://<host>:8443/xxxx. (Reason: CORS request failed). <unknown>

What could be the issue and what can I do? Is there anything I can do on the client side? Is DWA compatible with CORS (Cross-origin resource sharing)?

Thanks in advance!

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Donald Nong
(14.5k●6●14) Oct 02 '15, 1:59 a.m.
This is explained in details in the below article (also on why IE works)
https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy

If you are using Tomcat and would like to configure CORS, check out the answer in this post.
https://jazz.net/forum/questions/151485/does-rtc-support-cors-cross-origin-resource-needed-for-a-javascript-oslc-consumer

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Leire Torres
Oct 11 '15, 7:36 p.m.

 Thanks for the answer Donald.


I tried the steps you mention in the other post but I can´t achieve what I want.

The Tomcat version the CLM uses is 7.0.54, so I skip the first 3 steps and I started adding a new filter to the Tomcat configuration as described in the document; adding to the JTS/conf/web.xml file the next lines:

<!-- ================== Built In Filter Definitions ===================== -->
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
</filter>

<!-- ==================== Built In Filter Mappings ====================== -->
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

But when I execute the OpenSocial gadget from Firefox, still the following error appears: 

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://<host>:<port>/jts/rootservices. (Reason: CORS header 'Access-Control-Allow-Origin' missing). 

The request I made from Javascript is:

var rootServices = new XMLHttpRequest();
rootServices.onreadystatechange = function() 
{
if (rootServices.readyState == 4 && rootServices.status == 200)
{
//do something
}
}
rootServices.open('GET', 'https://<host>:<port>/jts/rootservices', true);
rootServices.send(null);

What could be the issue and what can I do?

Thanks in advance!

Leire Torres
Oct 09 '15, 4:03 a.m.

Thanks for the answer Donald.


I tried the steps you mention but still the same error appears.

Donald Nong
Oct 11 '15, 7:43 p.m.

Have you checked the request/response headers? To make this work, you should have the response "Access-Control-Allow-Origin" header match the request "Origin" header.

Leire Torres
Oct 14 '15, 5:24 a.m.

Yes, I checked them with Advanced Rest Client Chrome extension and this is what I get:


Request headers:

Leire Torres
Oct 14 '15, 7:09 a.m.

Sorry dnong, but I have just realized that I see these response headers only when Allow-Control-Allow-Origin: * Chrome extension is enabled. 


Is there something equivalent for Firefox? Or how can I avoid using these extensions?

Donald Nong
Nov 03 '15, 11:41 p.m.

Have you been able to do this? IIRC, the "Access-Control-Allow-Origin" response header is returned by Tomcat (or whatever the application server), so using a Chrome extension is just a "hack". There should be no need for any extra settings on the client side.

Leire Torres
Jan 12 '16, 3:21 a.m.

Yes, finally I got it. The request I made from Javascript was wrong.

Thank you for all your assistance.

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Question asked: Oct 01 '15, 9:45 a.m.

Question was seen: 7,208 times

Last updated: Jan 12 '16, 3:21 a.m.

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