Nginx redirect map with query string

Question

I have nginx configuration like this:

map $request_uri $target {
    /test1234 https://www.somedomain.com/new_url?source=stackoverflow$is_args$args;
}

map $request_uri $target_code {
    /test1234 301;
}
server {
    listen 80 default;

    if ($target_code = 301) {
        return 301 $target;
    }
}

For /test1234 it works but if I have /test1234?test=1 or any query string, then nginx doesn't match this redirect. It must work for any parameters.

Is any way to set up wildcard for any query string?

Ivan Shatsky · Accepted Answer · 2018-11-30 14:18:05Z

3

First, you are using $request_uri variable, which contains full original request URI with arguments, so your map directive will never match when request have some parameters. Use $uri variable instead.

Secondly, imagine you have a request http://yourdomain.com/test1234?test=test. In $target you'll get https://www.somedomain.com/new_url?source=stackoverflow?test=test. You can use additional map directive in your config to avoid that:

map $is_args $args_prefix {
    ? &;
}

map $uri $target {
    /test1234 https://www.somedomain.com/new_url?source=stackoverflow$args_prefix$args;
}

And at last, I recommend use of location directive inside your server configuration block instead of if, for example:

location = /test1234 {
    return 301 $target;
}

If is evil!

answered Nov 30, 2018 at 14:18

Ivan Shatsky

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1 Comment

quentino Over a year ago

Thanks, this is what I needed. But I have to using if because I have different redirect types: 301 302 303 and 307

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