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Home » Modeling » TMF (Xtext) » Error 404 with CORS enabled(After Enabling CORS on the jetty server xtext-services can not be found)

Error 404 with CORS enabled [message #1770461]

Fri, 11 August 2017 17:24

Eclipse User

I am running xtext web using the code mirror ide and when the editor is served from one domain and the xtext server is running inside Jetty from on a different domain I am getting the following error:

jquery.js:9203 GET http://10.39.83.243:8084/xtext-service/occurrences?resource=47c9d7fc.stext&caretOffset=0 404 (The requested resource was not found.)
I am seeing this error after enabling the Jetty Cors Filter and using the following parameters.

<filter>
        <filter-name>cross-origin</filter-name>
        <filter-class>org.eclipse.jetty.servlets.CrossOriginFilter</filter-class>
        

        <init-param>
        <param-name>allowedOrigins</param-name>
        <param-value>*</param-value>
    </init-param>
    <init-param>
        <param-name>allowedMethods</param-name>
        <param-value>GET,POST,HEAD,PUT,OPTIONS</param-value>
    </init-param>
  
    <init-param>
        <param-name>allowedHeaders</param-name>
        <param-value>X-Requested-With,Content-Type,Accept,Origin,Access-Control-Allow-Origin</param-value>
    </init-param>
    <init-param>
    <param-name>exposedHeaders</param-name>
    <param-value>X-Requested-With,Content-Type,Accept,Origin,Access-Control-Allow-Origin</param-value>
    </init-param>
    
    </filter>
   
    <filter-mapping>
        <filter-name>cross-origin</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

Before I enabled CORS I was see this message in the browsers console

XMLHttpRequest cannot load http://10.39.83.243:8084/xtext-service/update?resource=61e94e99.stext. Method PUT is not allowed by Access-Control-Allow-Methods in preflight response.

Re: Error 404 with CORS enabled [message #1770473 is a reply to message #1770461]

Sat, 12 August 2017 01:36

Eclipse User

Does this affect all services or the occurrences only.
Unfortunately I have no idea and setting this up
Is a lot of work

Did you try to debug into the server side?

Re: Error 404 with CORS enabled [message #1770558 is a reply to message #1770473]

Mon, 14 August 2017 08:27

Eclipse User

Yes is does affect all the xtext services. What is odd is that I do not see the Error 404 until after I enable the CORS filter on the Jetty server. I will update you as I get more information.

Thanks

Re: Error 404 with CORS enabled [message #1770573 is a reply to message #1770558]

Mon, 14 August 2017 11:40

Eclipse User

After debugging the server code I an getting the following error from the XtextServlet class

org.eclipse.xtext.web.server.InvalidRequestException$ResourceNotFoundException: The requested resource was not found

Re: Error 404 with CORS enabled [message #1770574 is a reply to message #1770573]

Mon, 14 August 2017 11:45

Eclipse User

looks like not all request are sent to the server.

so you should compare the communication in both cases

Re: Error 404 with CORS enabled [message #1770580 is a reply to message #1770574]

Mon, 14 August 2017 11:50

Eclipse User

(maybe its a session thingy, and there is no correct relation of sessions in both servers)

Re: Error 404 with CORS enabled [message #1770586 is a reply to message #1770580]

Mon, 14 August 2017 12:18

Eclipse User

here is some logging of what happens by default

0    [qtp109961541-13] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/update: fullText=, resource=34b64416.mydsl, serviceType=update
88   [qtp109961541-16] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/validate: requiredStateId=-80000000, resource=34b64416.mydsl, serviceType=validate
20523 [qtp109961541-15] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/update: deltaOffset=0, deltaReplaceLength=0, deltaText=He, requiredStateId=-80000000, resource=34b64416.mydsl, serviceType=update
20559 [qtp109961541-13] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/validate: requiredStateId=-7fffffff, resource=34b64416.mydsl, serviceType=validate
20580 [qtp109961541-16] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/occurrences: caretOffset=2, requiredStateId=-7fffffff, resource=34b64416.mydsl, serviceType=occurrences
20852 [qtp109961541-20] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/assist: caretOffset=2, requiredStateId=-7fffffff, resource=34b64416.mydsl, serviceType=assist
21807 [qtp109961541-12] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/assist: caretOffset=6, deltaOffset=2, deltaReplaceLength=0, deltaText='llo ', requiredStateId=-7fffffff, resource=34b64416.mydsl, serviceType=assist
21861 [qtp109961541-10] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/validate: requiredStateId=-7ffffffe, resource=34b64416.mydsl, serviceType=validate
22175 [qtp109961541-10] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/occurrences: caretOffset=6, requiredStateId=-7ffffffe, resource=34b64416.mydsl, serviceType=occurrences
22724 [qtp109961541-14] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/assist: caretOffset=11, deltaOffset=6, deltaReplaceLength=0, deltaText='name ', requiredStateId=-7ffffffe, resource=34b64416.mydsl, serviceType=assist
22770 [qtp109961541-21] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/validate: requiredStateId=-7ffffffd, resource=34b64416.mydsl, serviceType=validate
23081 [qtp109961541-24] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/occurrences: caretOffset=11, requiredStateId=-7ffffffd, resource=34b64416.mydsl, serviceType=occurrences
23981 [qtp109961541-15] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/update: deltaOffset=11, deltaReplaceLength=0, deltaText=!, requiredStateId=-7ffffffd, resource=34b64416.mydsl, serviceType=update
24002 [qtp109961541-13] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/validate: requiredStateId=-7ffffffc, resource=34b64416.mydsl, serviceType=validate
24024 [qtp109961541-16] TRACE org.eclipse.xtext.web.server.XtextServiceDispatcher  - xtext-service/occurrences: caretOffset=12, requiredStateId=-7ffffffc, resource=34b64416.mydsl, serviceType=occurrences

Re: Error 404 with CORS enabled [message #1770736 is a reply to message #1770586]

Wed, 16 August 2017 11:45

Eclipse User

The issue appears to be session related. Even when I access the editor and server from same machine using a different ip address I get 2 different sessions.

Thanks for your help!

Re: Error 404 with CORS enabled [message #1770737 is a reply to message #1770736]

Wed, 16 August 2017 11:47

Eclipse User

How do your requests look like

Re: Error 404 with CORS enabled [message #1770762 is a reply to message #1770737]

Wed, 16 August 2017 16:33

Eclipse User

After further testing I was able to confirm that each request to a xtext-service is generating a new SessionID.

I was also able to test and confirm that I do not see this issue when I am using Xtext v 2.11.0 . The CORS errors start showing up after I upgraded to Xtext 2.12.

Re: Error 404 with CORS enabled [message #1770771 is a reply to message #1770762]

Wed, 16 August 2017 23:40

Eclipse User

Did you check the differences in webjArs being used

Re: Error 404 with CORS enabled [message #1770834 is a reply to message #1770771]

Thu, 17 August 2017 09:51

Eclipse User

Yes I am using the same version of codemirror and requires js in both cases.
Should webjars have been upgraded was well.?

Re: Error 404 with CORS enabled [message #1770835 is a reply to message #1770834]

Thu, 17 August 2017 09:52

Eclipse User

I am using requires,js 2,2.0 , codemirror 5.22.0 and jquery 2.2.3

Re: Error 404 with CORS enabled [message #1770836 is a reply to message #1770835]

Thu, 17 August 2017 09:56

Eclipse User

maybe something changed with these. i cannot help you since i dont have the two hours i need to create a reproducible example

Re: Error 404 with CORS enabled [message #1770852 is a reply to message #1770836]

Thu, 17 August 2017 18:18

Eclipse User

Thanks! Here some more information.

I have recently discovered that when it is fails the browser does not allow for the cookie with a jsesionID to be enabled.

Re: Error 404 with CORS enabled [message #1771491 is a reply to message #1770852]

Fri, 25 August 2017 11:32

Eclipse User

It appears that when the you are in a cross domain situation(the editor is served from one address and the Xtext servlets are being served from another address that the server sends a Set-Cookie header to the browser,however the browser ignores it and does not set the cookie. This behavior has only started happening after Chrome 45.

I have also discovered in that adding the following to your jquery ajax calls that is will allow the browser to respect the SET-COOKIE header

crossDomain: true,
			xhrFields: {
				withCredentials: true
			}

I tested this using my own servlet and JS code inside a page and it appears to work. Is there a way to tell the xtext-codemirror.js to use these same settings.

Re: Error 404 with CORS enabled [message #1771494 is a reply to message #1771491]

Fri, 25 August 2017 11:35

Eclipse User

Can you open an issue at Xtext web maybe with a pull request

Re: Error 404 with CORS enabled [message #1771499 is a reply to message #1771494]

Fri, 25 August 2017 14:27

Eclipse User

Yes I can do that

Re: Error 404 with CORS enabled [message #1771719 is a reply to message #1771494]

Tue, 29 August 2017 16:08

Eclipse User

Christian

Not sure of the process you want me follow here.

Should open issued on the repository and then fork the repo to make the change and then create a pull request.

Re: Error 404 with CORS enabled [message #1771732 is a reply to message #1771719]

Wed, 30 August 2017 00:21

Eclipse User

Yes. But I am not sure if we want this feature. So pull request only if the feature is easily toggleable

Re: Error 404 with CORS enabled [message #1772114 is a reply to message #1771732]

Tue, 05 September 2017 12:32

Eclipse User

Christian,

I have created a pull request for this request.

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