Nginx Redirect depending on URL Param

Question

I am new at nginx and need help with redirect (basically I am a Java Dev), so here is what I need suggestions for : I have a url https://www.mysite.com/abc?server=10.2.2.10

I want nginx to check if server param is set then it should rewrite url to

https://10.2.2.10/abc

here is what I have tried but it isn't working:

location /abc/{  # I have also tried with /abc
    if ($arg_server != ""){
        rewrite https://$arg_server/$1 permanent;
    }
}

any suggestions please? Thank you for any helps guys

best Regards Sajid

by not working you mean doesn't do any thing or does it show an error ? — Mohammad AbuShady
– Mohammad AbuShady, Commented Mar 5, 2014 at 15:14
It's really strange idea, to provide nginx a server name and have nginx redirect to that server. Why not just go to that server in first place? — Alexey Ten
– Alexey Ten, Commented Mar 5, 2014 at 16:57
actually first site is suppose to get data from 2nd one ...... — Faisal I
– Faisal I, Commented Mar 5, 2014 at 19:39

Mohammad AbuShady · Accepted Answer · 2014-03-05 15:24:04Z

1

Actually the rewrite seems wrong, try replacing the rewrite line with this

if ($arg_server != ""){
    return 301 https://$arg_server/$1;
}

Adding a ^ to your rewrite probably would have worked but it's better to use return instead of rewrite here's why

Also I believe running a simple if($arg_server) would work without the != part, you can try it, Not sure though if it would work if it was empty string, like example.com?server=, if it does then just ignore what i said

edited Mar 5, 2014 at 15:24

answered Mar 5, 2014 at 15:15

Mohammad AbuShady

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8 Comments

Faisal I Over a year ago

sure I am gonna give it a try right away Thank you :)

Faisal I Over a year ago

curl mysite.com/abc?server=someip -k <html> <head><title>301 Moved Permanently</title></head> <body bgcolor="white"> <center><h1>301 Moved Permanently</h1></center> <hr><center>ngx_openresty/1.4.3.1</center> </body> </html> I get above when I use CURL but I do not get any request on the ip where nginx is suppose to redirect

Mohammad AbuShady Over a year ago

probably because curl doesn't follow redirects, what does the browser do ? or try adding -L to curl

Alexey Ten Over a year ago

I guess it should be https://$arg_server$uri, because I don't see any regexp that fills $1.

Faisal I Over a year ago

@MohammadAbuShady basically I am using AJAX call here is what I get: XMLHttpRequest cannot load https://[new_ip_address]/abc. Origin mysite.com is not allowed by Access-Control-Allow-Origin. I know It can be handled by CORs but I was wondering if there is any other way around?

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