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Assuming my server is, on Nginx 1.0.6

I'm trying to proxy all request to to other hosts, the destination URL is specified as a GET parameter named "url".

For instance, when user requests either one:

it should be proxyed to

I'm using the following nginx config and it works fine only if the url paramter contains domain name, like; but fails on http://another-server/... on error:

another-server could not be resolved (3: Host not found)

nginx.conf is:

http {
# the DNS server
server {
    listen       80;
    server_name  localhost;
    root /path/to/site/root;

    location = /fetch {            
        proxy_pass $arg_url;

Here, I'd like to resolve all URL without domain name as host name in, in /etc/resolv.conf, it's possible to specify default search domain name for the whole Linux system, but it doesn't affect nginx resolver:


Is it possible in Nginx? Or alternatively, how to "rewrite" the url parameter so that I can add the domain name?

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1 Answer 1

up vote 0 down vote accepted

nginx performs its own DNS resolution and doesn't use the libc library, which is why /etc/resolv.conf doesn't have an effect. I can't find any option to specify a search domain, so rewriting the URL is your only option. Something like this should do the trick:

location /fetch {
    # Don't rewrite if we've already rewritten or the request already contains the full domain
    if ($arg_url !~ {
        rewrite ^/fetch?url=http://([^/]+)(/?.*)$ /fetch?url=http://$$2;
    proxy_pass $arg_url;
share|improve this answer
It looks the only working solution – myjpa Apr 16 '12 at 2:59

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