accessing the value of ngx.ctx.<var> from inside C code

rvsw · 2015-06-02T21:36:13+00:00

Thanks... Somehow missed it. Sorry for the noise.

accessing the value of ngx.ctx.<var> from inside C code

rvsw

Hello agentzh

I need to access the value of one of the variables (part of response body) that I set in lua during body filter stage from an nginx C module

e.g

I did this in Lua

ngx.ctx.my_resp_buf = "abc"

I now need to find the value of my_resp_buf in a C source file that can access lua variables (i.e. it is part of lua module that you have written).

I was hoping that I can use ngx_http_lua_ngx_get_ctx and retrieve the value from there but that does not seem to be the case.

Will you be able to provide guidance on where is the variable my_resp_buf stored in C struct and how I can access it. The documentation says that this will be a table.

Thank you for your help

agentzh

Hello!

On Tue, Jun 2, 2015 at 9:36 PM, rvsw wrote:
> I need to access the value of one of the variables (part of response body)
> that I set in lua during body filter stage from an nginx C module
> e.g
> I did this in Lua
> ngx.ctx.my_resp_buf = "abc"
>

No, ngx.ctx is not meant to pass data to/from other nginx C modules.
It won't work anyway.

Whereas, the nginx variables are designed for this purpose naturally
and you should use this mechanism instead (you can always manipulate
nginx variables easily on the Lua land via the ngx.var.NAME API
anyway).

Regards,
-agentzh