I am trying to replace specific character (+ plus sign) in arguments part to space character (%20). I made rewrite for path part but while testing I learned that NGINX doesn't change arguments after ? sign (I am new to NGINX).
I tried to do it for args part of configuration but it doesn't work as it should, it adds $20 until I get error that page isn't redirecting correctly.
The request URL ) I receive is always the same.
func=autocomplete&q=<(unlimited number of letters and plus signs (mostly 4-5 plus signs)>&key_lic=xxxxx
The code in NGINX configurations is following.
location /autocomplete/luka/ {
if ($args ~* "^([^+]*)(\+?)([^+]*)(\+?)([^+]*)(\+?)(.*)$"){
set $args $1%20$3%20$5%20$7;
rewrite (.*)$ $1 redirect;
}
proxy_pass http://link.where.to.finish/wm2/;
}
Thank you for any help I could get.
Your existing scheme fails because all of the + signs are optional.
If you want to redirect your URI to one where all of the + signs are replaced by %20, you can just use a space and let Nginx and/or the browser handle the encoding.
For example:
if ($args ~ ^(.*)\+(.*)$) { return 302 "$uri?$1 $2"; }
The redirect is recursive until all + signs are replaced.
If you intention is to correct the URI without redirection, so that only the upstream server sees the + signs replaced by %20, use rewrite...last instead.
For example:
if ($args ~ ^(?<first>.*)\+(?<second>.*)$) {
rewrite ^(.*)$ "$1?$first%20$second?" last;
}
In this case it is necessary to use named captures in the first regular expression so that they can be used in the second. See this document for details.