How to keep content of file after read it . .

parsik6

Hi .
I can open a file and read it and save it into the local variable but , I WANT TO OPEN AND READ MY FILE ONLY ONCE
and after that one time , i have my file and use it for many times .
simple :
i don't want more I/O operations on my serevr . So i want to get file once and use it for every request , with out getting file again .
(just like cache).
Thanks .

aapo.talvensaari

On Saturday, 27 August 2016, mehrdad hosein nejad <par...@gmail.com> wrote:

Hi .
I can open a file and read it and save it into the local variable but , I WANT TO OPEN AND READ MY FILE ONLY ONCE

Use init_by_lua and cache to module level variable.

parsik6

can you give an example ?
excuse me but I didn't understand .

On Saturday, August 27, 2016 at 2:17:44 PM UTC+4:30, Aapo Talvensaari wrote:

On Saturday, 27 August 2016, mehrdad hosein nejad <par...@gmail.com> wrote:
Hi .
I can open a file and read it and save it into the local variable but , I WANT TO OPEN AND READ MY FILE ONLY ONCE

Use init_by_lua and cache to module level variable.

agentzh

Hello!

On Sat, Aug 27, 2016 at 3:12 AM, mehrdad hosein nejad wrote:
> can you give an example ?
> excuse me but I didn't understand .
>

See

https://github.com/openresty/lua-nginx-module/#data-sharing-within-an-nginx-worker

https://github.com/openresty/lua-nginx-module/#lua_shared_dict

https://github.com/openresty/lua-resty-lrucache

Regards,
-agentzh

aapo.talvensaari

On 27 August 2016 at 13:12, mehrdad hosein nejad <par...@gmail.com> wrote:

can you give an example ?
excuse me but I didn't understand .

Basically in init_by_lua you require your modulel:

require "load.file"

Now in load/file.lua you do something like this:

local data = "">

return { data = "" }

Now you have in package.loaded this load.file. Now in some other context like content_by_lua, you just do:

local file = require "load.file"

local data = "">

It will not execute this line again:

local data = "">

It basically just returns:

return { data = "" }

And that's about it.

aapo.talvensaari

On Wednesday, 31 August 2016 12:42:39 UTC+3, Aapo Talvensaari wrote:

local data = "">
return { data = "" }

This was a rename leftover, I really meant:

local data = "">
return { data = "" }