callout_custom_url_via_lua_code.json

{
	"name": "request-callout",
	"config": {
		"callouts": [
			{
				"name": "callout1",
				"request": {
					"url": "http://httpbin.org/anything",
					"by_lua": "local body = kong.request.get_body() or {}; local id = body.id; if id then kong.ctx.shared.callouts.callout1.request.params.url = 'http://httpbin.org/anything/' .. id end",
					"method": "GET"
				},
				"response": {
					"body": {
						"decode": true
					}
				}
			}
		],
		"upstream": {
			"body": {
				"forward": false,
				"custom": {
					"id": "$(callouts.callout1.response.body.url)"
				}
			}
		}
	}
}