await checkEndpoint(url);
Map Version Synchronicity (Important!): For HH-Routing to work correctly when a route crosses multiple map files (e.g., different countries or regions), all those map files MUST be from the same generation date (i.e., downloaded from OsmAnd around the same time, based on the same underlying OpenStreetMap data version and pre-calculation run).。关于这个话题，heLLoword翻译官方下载提供了深入分析
https://feedx.net。爱思助手下载最新版本对此有专业解读
return (float)rand() / RAND_MAX;