How to log all headers in nginx?

Question

How do I log all the headers the client (browser) has sent in Nginx? I also want to log the response headers. Note that I am using nginx as reverse proxy.

After going through documentation, I understand that I can log a specific header, but I want to log all of the headers.

Answer 1

After much research, I can conclude that it is not possible out of the box.

Update- you can use openresty which comes with Lua. Using Lua one can do pretty cool things, including logging all of the headers to say, Redis or some other server

Answer 2

As @gauravphoenix said you need openresty which comes with Lua. See https://github.com/openresty/lua-nginx-module/ for installing it. Once it's running then add in nginx

header_filter_by_lua_block {   local h = ngx.req.get_headers()   for k, v in pairs(h) do     ngx.log(ngx.ERR, "Got header "..k..": "..toString(v)..";")   end } 

Inspect your error log.