Http OPTIONS is resetting JSESSIONID

[Azher Uddin Farooqi]

Hello,

I've recently noticed that certain (all?) browsers do not send cookies with OPTIONS requests, but session (understandably) sends a cookie response with a new session ID in response to these. (OPTIONS requests are used to probe CORS access control headers prior to sending AJAX requests.)

My specific scenario is the following:

1. request  https://my-domain.appspot.com 
• a. Receive cookie with new session ID
  
2. AJAX OPTIONS request to https://my-domain.appspot.com to probe for CORS headers (this is automatically generated by the browser) 
• a. Browser does not send cookie 
  
• b. Session responds with Set-Cookie header and NEW session ID
  
3. Subsequent requests to https://my-domain.appspot.com use different session ID
4. Because of session ID mismatch, CORS filter blocks the requests.

What can I do to prevent new session ID getting created in step #2 ? Or how can I avoid my requests getting failed in the above scenario ?

Thanks,

Azher

[Patrice (Cloud Platform Support)]

Hi Azher

While this is a bit clunky at best, can't you save the session ID when first receiving the cookie, put it into memcache (or datastore if you want to be certain there's no flush on the memcache), and make your requests use that?

Cheers

[Alex Martelli]

Not sure what this has to do with app engine (or any other server-side system) -- it appears to be entirely a client-side (browser) problem. Maybe http://stackoverflow.com/questions/2870371/why-is-jquerys-ajax-method-not-sending-my-session-cookie can help (the second answer, not the accepted one).

Alex

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