Using Lua to communicate with a backend

info · 2014-08-05T04:34:36+00:00

Your hex string is actually different from your ascii string. irb(main):003:0> "welcome1welcome1".unpack("H*")=> ["77656c636f6d653177656c636f...

Using Lua to communicate with a backend

info

How would I do something like this:

upstream backend {
    server 127.0.0.1:9011;
    server 127.0.0.1:9012;
    least_conn;
}

[...]

rewrite_by_lua '
x = 1;
y = 5;
call backend (x,y);
process return values;
';

nb. backend is a calculation server.

agentzh

Hello!

On Mon, Aug 4, 2014 at 1:34 PM,  info wrote:
> rewrite_by_lua '
>   x = 1;
>   y = 5;
>   call backend (x,y);
>   process return values;
> ';
>
> nb. backend is a calculation server.
>

Two ways:

1. Use ngx.location.capture + ngx_proxy.
2. Use cosocket API to access backend directly (for example, you can
use one of those lua-resty-http libraries for this).

Regards,
-agentzh

info

Hello agentzh, can I have a basic example for 1 and 2 ?

2. Use cosocket API to access backend directly (for example, you can

use one of those lua-resty-http libraries for this).

Regards,
-agentzh

agentzh

Hello!

On Mon, Aug 4, 2014 at 2:20 PM,  info wrote:
> Hello agentzh, can I have a basic example for 1 and 2 ?
>

Please check out the relevant documentation. I don't have the time to
provide examples to every user asking for them. Thank you for your
understanding.

Regards,
-agentzh