[SOLVED] Custom response from Tarantool + Nginx

Custom response from Tarantool + Nginx

Have instance: Nginx in DMZ with TNT_nginx_upstream_module + Tarantool Cartridge as API server.
When i have response with good result - it's 200 OK + JSON with data
How to set other response?

400 Bad Request
403 Forbidden
404 Not found
410 Gone
500 Internal Server Error
503 Service Unavailable

Solution

The Tarantool Nginx upstream module has been designed to follow JSON RPC, not the generic HTTP. There is a way to return arbitrary results, using rewrite_by_lua in the location section. It looks like this:

location /api {
  default_type application/json;
  rewrite_by_lua '
    ...
  ';
}

I'm not pasting the full snippet here, as it is quite long. You can look it up here.

In general, I would also advise you to not use the mentioned upstream module if you want a generic HTTP API. It is better to use the HTTP server module written in Lua, and use Nginx as a regular reverse proxy. As a bonus, the Lua HTTP server comes on board of the cartridge module.