nginx.conf

events {
    worker_connections 1024;
}

env LAUNCHDARKLY_SDK_KEY;
env LAUNCHDARKLY_FLAG_KEY;

http {
    resolver 8.8.8.8;

    lua_package_path ";;/usr/local/openresty/nginx/scripts/?.lua;";

    init_worker_by_lua_file scripts/shared.lua;

    server {
        location / {
            default_type text/html;

            content_by_lua_block {
                local os     = require("os")
                local ld     = require("launchdarkly_server_sdk")
                local client = require("shared")
                local get_from_env_or_default = require("get_from_env_or_default")


                -- Set MY_FLAG_KEY to the feature flag key you want to evaluate. To specify the flag key as
                -- an environment variable instead, set LAUNCHDARKLY_FLAG_KEY using '--env LAUNCHDARKLY_FLAG_KEY=my-boolean-flag-key'
                -- as a 'docker run' argument.

                local MY_FLAG_KEY = ""

                local user = ld.makeContext({
                    user =  {
                        key = "example-user-key",
                        name = "Sandy"
                    }
                })

                local flag_key = get_from_env_or_default("LAUNCHDARKLY_FLAG_KEY", MY_FLAG_KEY)
                local flag_value = client:boolVariation(user, flag_key, false)
                ngx.say("<p>The " .. flag_key .. " feature flag evaluates to " .. tostring(flag_value) .. ".</p>")
            }
        }
    }
}