Hello!

On Tue, Dec 25, 2012 at 08:06:45AM -0500, xinghua_hi wrote:

> I want to display different pages when 413 code return, for example
>
> set $var 1;
> if （$var = 1) {
> error_page 413 /413_old.html;
> }
> if ($var =2) {
> error_page 413 /413_new.html;
> }
>
> error_page can not work, but I write error_page directive in location block
> directly instead of using if directive, it can work normally

There several ways to do what you want. E.g. you may use
variables in the error page specified, e.g.

error_page 413 /413.$var.html;

or use an error_page with additional processing for the page in
question, e.g.

error_page 413 /413.html;

location = /413.html {
if ($new) {
rewrite ^ /413.new.html;
}
}


--
Maxim Dounin
http://nginx.com/support.html

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