April 02, 2015 05:44AM

I am facing a problem on a website which has been using AJAX callbacks to
report JS errors.
It seems there has been sth wrong going on and a tremendous number of
errors are being reported through the callback.
You could say the website owner crafted it own DDoS vector.

Errors collection has been deactivated and our cache purged so new visitors
are unaffected.
However it seems an old version of the cache is stored somewhere in a
specific network since its gateway is responsible for a huge amount of

The question is:
- Knowing the current version of the page is OK
- Knowing we isolated the callback calls (POST, not cached) in nginx to
alleviate the pain previously inflicted to the backends

Is there a way (HTTP Status code?) to tell the page making these callbacks
to refreh itself?

I was thinking about 205, but I am unsure if it means what I think it does.
Does it merely clear forms and other types of user input in the page?
For now, We are serving 204, even though the JS script does not seem to
like it (requests volume increased, but nginx can handle without problem of
​The problem is now traffic volume...​
*B. R.*
nginx mailing list
Subject Author Posted

Callback hitting hard

B.R. April 02, 2015 05:44AM

Re: Callback hitting hard

B.R. April 02, 2015 08:36AM

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