How can I get a param using regex in a nginx server block?

Question

I'm trying to get a param(h=1500 for example) via regex in a server block in an nginx server but it's not working. My last try was this:

location ~ "^/app/events/(?<eventid>\d+)/(?<image>.+)?h=(?<height>\d+)$" { ...... }

Here you can check and it works: https://regex101.com/r/kP9eY9/1

But in my server block file it does't.

If I try something like this, it works:

location ~ "^/app/events/(?<eventid>\d+)/(?<image>.+)/(?<height>\d+)$" { ...... }

Instead a param like "h=300", I just use a "/300" and I can get the value in my server block file.

I'm not a expert using regex so I can't see if there is something wrong. I need your help guys! Thank you!

Have you tried to escape eqiality sign? I mean h\=. Also ? after your (?<image>.+). First request has it, but second doesn't. According to example string in provided link, I guess you wanted to set it as a character, not as special symbol, so use (?<image>.+)\? — Ngoral
– Ngoral, Commented Sep 6, 2016 at 22:14
I did try (?<image>.+)\? but this also doesn't work. And yes, I want it as a character like a get parameter ?foo=bar. I don't know if I did undertand, do I also need to escape the eqiality sign? Like \?h\=(?<height>\d+) — Felipe
– Felipe, Commented Sep 7, 2016 at 0:36

Richard Smith · Accepted Answer · 2016-09-07 07:10:02Z

2

locations of all types test only a URI part of request line without arguments

which means the ? and anything that follows it.

answered Sep 7, 2016 at 7:10

Richard Smith

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Comments

Oleg Kuralenko · Accepted Answer · 2016-09-07 07:21:40Z

0

As @Richard mentioned, you can't use request arguments in locations regexps.

If you need to work with request arguments in your nginx config you might use $arg_ and/or $args syntax:

I.e

location / {
  if ($arg_param = 'someval') {
     # some code here
  }
}

answered Sep 7, 2016 at 7:21

Oleg Kuralenko

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