http {
        log_format log_req_resp '$remote_addr - $remote_user [$time_local] ' '"$request" $status $body_bytes_sent ' "$http_referer" "$http_user_agent"  $http_x_real_ip $http_x_forwarded_for $request_time $content_type $host $http_authorization $http_x_sdk_date $http_x_sdk_content_sha256  '"$http_referer" "$http_user_agent" $request_time req_body:"$request_body"'  ' resp_body:"$resp_body" resp_header:"$resp_header"';
        log_format log_req_resp '$remote_addr | $http_x_real_ip | $http_x_forwarded_for ' '"$request" $status' "$http_referer" "$http_user_agent"  $request_time $content_type $host 'resp_header:"$resp_header"';
         server {
                 access_log logs/access.log log_req_resp; 
                 set $req_header "";
                 set $resp_header "";
header_filter_by_lua '
    local h = ngx.resp.get_headers()
    for k, v in pairs(h) do
        if type(v) == "table" then
            for k, vv in pairs(v) do
                ngx.var.resp_header = ngx.var.resp_header..k..": "..vv;
            end
        else
            ngx.var.resp_header = ngx.var.resp_header..k..": "..v;
        end
    end
';
set $resp_body "";
body_filter_by_lua '
  local resp_body = string.sub(ngx.arg[1], 1, 1000)
  ngx.ctx.buffered = (ngx.ctx.buffered or "") .. resp_body
  if ngx.arg[2] then
     ngx.var.resp_body = ngx.ctx.buffered
  end
';
          }
  }

注意自定义响应头通过使用http_开头即可。

反向代理增加请求头

location /some/path/ {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_pass http://localhost:8000;
}