nginx

calum.hgs.club.conf

lua_shared_dict calum_scores 12k;
server {
    server_name calum.hgs.club;
    listen 80;
    default_type text; 
    add_header 'Access-Control-Allow-Origin' '*';

    location / {
        return 444;
    }

    location /get {
        content_by_lua '
            local dict = ngx.shared.calum_scores
            local score, name = tostring(dict:get("score")), tostring(dict:get("name"))
            ngx.say(score .. " " .. name)
        ';
    }

    location /set {
        content_by_lua '
            local args = ngx.req.get_uri_args()
            local dict = ngx.shared.calum_scores
            local success, err = false, "bad data provided"
            local score = tonumber(args.score)
            local name = tostring(args.name)
            if args.score and score and args.name and (score >= 0) and (score <= 100) and (#name <= 20) and (#name > 0) then
                local forcible
                
                success, err, forcible = dict:set("score", score)
                if forcible then
                    dict:flush_expired()
                end
                
                if success then
                    success, err, forcible = dict:set("name", name)
                    if forcible then
                        dict:flush_expired()
                    end
                end    
            end

            if not success then
                dict:set("name", nil)
                dict:set("score", nil)
                ngx.say("error: " .. tostring(err))
                return
            end

            ngx.say("highscore set to " .. score)
            ngx.say("\\nname set to " .. name)
        ';
    }
}