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Error 404 with CORS enabled [message #1770461]

Fri, 11 August 2017 21:24

Alan Frye is currently offline

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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.

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

Sat, 12 August 2017 05:36

Christian Dietrich is currently offline

Christian Dietrich

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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?

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

Mon, 14 August 2017 12:27

Alan Frye is currently offline

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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

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

Mon, 14 August 2017 15:40

Alan Frye is currently offline

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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

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

Mon, 14 August 2017 15:45

Christian Dietrich is currently offline

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looks like not all request are sent to the server.

so you should compare the communication in both cases

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

Mon, 14 August 2017 15:50

Christian Dietrich is currently offline

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

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

Mon, 14 August 2017 16:18

Christian Dietrich is currently offline

Christian Dietrich

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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

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

Wed, 16 August 2017 15:45

Alan Frye is currently offline

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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!

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

Wed, 16 August 2017 15:47

Christian Dietrich is currently offline

Christian Dietrich

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How do your requests look like

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

Wed, 16 August 2017 20:33

Alan Frye is currently offline

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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.

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

Thu, 17 August 2017 03:40

Christian Dietrich is currently offline

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Did you check the differences in webjArs being used

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

Thu, 17 August 2017 13:51

Alan Frye is currently offline

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

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

Thu, 17 August 2017 13:52

Alan Frye is currently offline

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

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

Thu, 17 August 2017 13:56

Christian Dietrich is currently offline

Christian Dietrich

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

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

Thu, 17 August 2017 22:18

Alan Frye is currently offline

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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.

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

Fri, 25 August 2017 15:32

Alan Frye is currently offline

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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.

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

Fri, 25 August 2017 15:35

Christian Dietrich is currently offline

Christian Dietrich

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

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

Fri, 25 August 2017 18:27

Alan Frye is currently offline

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Yes I can do that

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

Tue, 29 August 2017 20:08

Alan Frye is currently offline

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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.

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

Wed, 30 August 2017 04:21

Christian Dietrich is currently offline

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

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

Tue, 05 September 2017 16:32

Alan Frye is currently offline

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Christian,

I have created a pull request for this request.

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