Re: [openresty-en] Passing variables between phases

rpaprocki · 2017-03-21T00:13:00+00:00

Hello! On Sun, May 1, 2016 at 7:12 PM, Rob Kelledy wrote: > "The ngx.ctx lookup requires relatively expensive metamethod calls and it is > much s...

Re: [openresty-en] Passing variables between phases

rpaprocki

Hi,

On Fri, Mar 17, 2017 at 9:26 PM, chintans <chintansharrma@gmail.com> wrote:

Hi Robert,

I tried ngx.ctx for sharing value between phases, unfortunately I am not getting the value as expected. I tried below code path and saw header has different value and body has different value.

header_filter_by_lua_block {
            local t = os.time()
            ngx.ctx.foo = t
            ngx.header["Foo"] = t
        }
body_filter_by_lua_block {
           ngx.arg[1] = ngx.arg[1]:gsub("**FOO**", ngx.ctx.foo)
        }

Be aware that chunked encodings may mean that you may not see the behavior you expect. Make sure to thoroughly debug your results :)

Also, don't use os.time(), even. Use ngx.time(), it's a more performant solution, and it's important to stick to OpenResty idioms wherever possible.

Also please don't resurrect old threads, it's often not useful :)