On Sat, Nov 27, 2010 at 8:06 PM, Delta Yeh <delta.yeh@gmail.com> wrote:
> can  lua be introduced into ngx_proxy_more, so there can what we can with lua
> when proxy a request?
>

The standard ngx_proxy module can already be used together with
ngx_lua, so will ngx_proxy_more :)

Actually any nginx modules can be used with ngx_lua.

There's mainly 5 ways:

1. Use set_by_lua at rewrite phase, and use other content handler
modules like ngx_proxy and ngx_fastcgi.

2. Use content_by_lua as the content handler to generate contents, and
use output filter modules, like ngx_headers and ngx_ctpp2 to process
the outputs later.

3. Use the ngx.location.capture() call from within Lua code to make
nginx subrequests to other nginx locations configured by ngx_drizzle,
ngx_postgres, ngx_proxy, and any other content handler modules.

4. Use the ngx.exec() call from within Lua (content_by_lua) to make
internal redirection to other locations. (Remember, it's not a
subrequest, rather, a "goto", which never comes back.)

5. Invoke other nginx module's config directives' computation at
runtime directly from within Lua by means of the ndk.set_var.DIRECTIVE
call. Configure directives used this way are limited to those
implemented atop NDK's set_var submodules' ndk_set_var_value
interface.

Please check out the ngx_lua documentation for more details:

https://github.com/chaoslawful/lua-nginx-module/

Our focus has been on making ngx_lua and the Lua programming language
the right glue in the whole nginx ecosystem, and helping Lua replace
PHP in more and more web applications that require outstanding
performance.

Cheers,
-agentzh

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