Response

Every handler and middleware receives the response as its second argument. All methods are chainable.

Method	Description
`res:status(code)`	Sets the status code (default `200`)
`res:header(name, value)`	Sets a response header
`res:send(data)`	String → `text/plain`; table → JSON with `application/json`
`res:json(data)`	Alias of `send` for tables

Chaining

app:post("/items", function(req, res)
    res:status(201)
       :header("x-request-id", "abc123")
       :json({ ok = true })
end)

Content types

send picks the Content-Type from the value you pass:

res:send("plain text")        -- text/plain
res:send({ some = "table" })  -- application/json
res:json({ some = "table" })  -- application/json (alias)