Nginx Reverse Proxy Lowercase URL and some exceptions to the URL

[Francis Daly]

On Fri, Oct 04, 2019 at 03:36:13PM -0400, Alex Med wrote:

Hi there,

Thanks for the extra information.

There are a few different things in here, but there is one that stands
out as probably being a "quick fix" that should allow the rest to be
tested separately...

> Your Question # 1
> -----
> then the requests for /dwr/interface/CategoryAjax.js,
> /dwr/interface/HostAjax.js, and /html/images/languages/gh_TW.gif are
> served from the first location, not the second.
> 
> So - I'm not seeing what you are reporting.
> 
> When you do a "curl -i" for /dwr/interface/CategoryAjax.js, what response
> do you get?
> 
> HTTP 200, HTTP 301, something else?
> ---
> 
> Answer to Your Question:
> 
> I get a 401 error not authorized if I use curl.

Ok; that suggests that it *is* being handled in your location#1, which
is what is wanted. That's good.

> The errors are being generated because nginx is lowercasing JsonTags and
> CategoriesServlet.
> 
> If I do a curl:
> 
> curl -i http://example.com/JsonTags
> HTTP/1.1 301 Moved Permanently
> Server: nginx
> Date: Fri, 04 Oct 2019 19:21:32 GMT
> Content-Type: text/html
> Content-Length: 178
> Connection: keep-alive
> Location: http://example.com/jsontags

Yes - that is because that's what your config asks it to do. Because...

> If I write http://example.com/API/ or http://example.com/API they are
> lowercased, they should not be lowercase because it
> should be served by location #1 which makes the path case insensitive with
> the "~".

No.

"~" means "this is a regex location".

"~*" would be "this is a case-insensitive regex location".

http://nginx.org/r/location

If you change your config to use "~*", does that make things do what
you want?

(Note: your location#1 will not match "/API", because that regex location
needs two slashes. So /API will probably be lowercased to /api, and /api
will probably be handled in location#3.)

> I also get this error:  WebSocket connection to
> 'ws://example.com/api/ws/v1/system/events' failed: Unexpected response code:
> 200. This I have been told
> that I have to set the proxy pass to localhost rather than IP in order to
> work it properly.  I have not tested it yet.

Websockets have not been mentioned in this mail yet, as far as I know.

I suggest: get the rest working first; then sort out websockets.

Good luck with it,

	f
-- 
Francis Daly        francis at daoine.org