proxy pass ajax problem

[Reinis Rozitis]

> hi all
>   I am using nginx as a reverse proxy for neo4j(you can assume it as a 
> http server). The problem is web page return by neo4j has ajax request 
> which is sent to neo4j server.
>    e.g.  the neo4j server is localhost:7474 . and nginx is bind to 8000
>    http://domain:8000/webadmin/ will send to http://domain:7474/webadmin/
>    but the returned page will send ajax request with 
> http://domain:7474/ajax-path
>    I want to the ajax request is also sent to 
> http://domain:8000/ajax-path. How to do this?
>   Thanks.

The problem most likely is that the neo4j server is using it's own 
servername/port for the url creation in the html.


Depending on the situation there are few ways you could fix/work arround it:

1. Change the neo4j/application source to use relative paths eg instead of 
http://domain:7474/ajax-path just /ajax-path

2. nginx can override location headers by using proxy_redirect ( 
http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_redirect )

3. If you are unable to change the generated output from the neo4j backend 
you could try to use the Sub module ( http://wiki.nginx.org/HttpSubModule ) 
in the proxy_pass location with something like:

sub_filter http://domain:7474 http://domain:8000;

.. and let nginx alter the source on the fly (though this isnt the best 
solution from performance aspect / also there are some caveats if the 
response from backend is compressed etc).


rr