transfer-encoding is not accessible from header-filter-by-lua block

hadi.abbasi.programmer · 2018-11-10T22:05:50+00:00

Hi Thibault, Thanks for the answer! Yes, I checked that module and it said it's still experimental, so I didn't dare to use it in our produ...

transfer-encoding is not accessible from header-filter-by-lua block

hadi.abbasi.programmer

Hi...
I'm trying to make a proxy server using openresty and my Simplified code is:

server {
       location / {
            ...
      }


     location @proxyPass {
         ..
         ..
         header_filter_by_lua_block  {
           ngx.print("transfer-encoding: " .. (ngx.resp.get_headers()["Transfer-Encoding"]  or  "Empty"))  -- Output : transfer-encoding: Empty
       }
   }
}

so I don't know why it's empty and how can I access transfer-encoding from header filter by lua!
please help me because it's important challenge for me..
thanks a lot..
Best,

hadi.abbasi.programmer

my browser shows that some responses have transfer-encoding attribute but I can't trace them from header_filter_by_lua_block for unknown reason!!!

hadi.abbasi.programmer

also I have tested ngx.header["Transfer-Encoding"] but the result is as before!

zchao1995

Hello!

The Transfer-Encoding is really a critical response header, it will be set in the ngx_http_header_filter_module.c:ngx_http_header_filter which is the last header filter module, so ngx_lua's header filter runs prior to this module.

hadi.abbasi.programmer

thanks a lot tokers...

On Thursday, November 15, 2018 at 6:19:21 AM UTC+3:30, tokers wrote:

Hello!

The Transfer-Encoding is really a critical response header, it will be set in the ngx_http_header_filter_module.c:ngx_http_header_filter which is the last header filter module, so ngx_lua's header filter runs prior to this module.