proxy_pass with trailing slash issue

[Maxim Dounin]

Hello!

On Thu, May 17, 2012 at 06:39:15PM +0000, John Moore wrote:

> I'm using nginx (0.7.65) as a reverse proxy in front of a bunch of 
> Tomcat instances. A couple of years ago, following Igor's suggestions on 
> the mailing list, I made a minor change to the configuration to deal 
> with a problem with encoding/decoding with some URLs proxied to Tomcat. 
> I appended a forward slash to the proxy_pass, so instead of having this:
> 
>      proxy_pass  http://backend;
> 
> I had this:
> 
>      proxy_pass  http://backend/;
> 
> It fixed the problem. But it had the side-effect (at least I assume it 
> was this) of inserting an extraneous leading slash into the proxied URL, 
> so that the requests ending up at Tomcat are like this:
> 
> "GET //whatever"
> 
> It's not actually breaking anything that I know about at the moment, but 
> it's clearly wrong and I'd like to fix it. How do I change my config so 
> that I get the benefits of the trailing slash with proxy_pass without 
> having the extraneous leading slash in the proxied request?

With

    location / {
        proxy_pass http://backend/;
    }

there shouldn't be any extra slashes, even in 0.7.65 which is 
rather old (and it may be good idea to upgrade it anyway).  Could 
you please provide full config and some logs which show the 
problem?

Maxim Dounin