Captcha - No Caching?

[Maik Unger]

Hello Everybody,

I have a Caching problem with any captcha pictures in nginx.

HTTP-Header: GET /index.php?eID=sr_freecap_captcha&id=650

How can I tell nginx, that he will not caching this request, when there
is the following string:

eID=sr_freecap_captcha

Config:

set $captcha_caching 1;
if ($arg_eID ~ 'sr_freecap_captcha')
{
     set $captcha_caching 0;
}

if ($captcha_caching = 0)
{
     break;
}

What is wrong with this config above?

Regards,


Maik

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