Proxy_pass with trailing slash issue

Server NGINX
1

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?

2

Hello!

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

 proxy_pass  http://backend/;

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 D.

3

On 17/05/12 20:08, Maxim D. wrote:

problem?

If it’s not the trailing slash which is causing the leading slash in the
proxied requests, I need to look elsewhere. If I don’t get anywhere,
I’ll try to produce something a little more informative.

I take your point about upgrading. The problem is that 0.7.65 is
absolutely rock solid, and is in use in an extremely busy system, so
there has been little incentive to upgrade! I do think we should do so,
though.

John