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 goi

Answer 1

As @gauravphoenix said you need opnresty 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..": "..v..";")
  end
}

Inspect your error log.