ListExpressRoutes.ts

//From https://github.com/expressjs/express/issues/3308

function getRoutesOfLayer(path: string, layer: any): string[] {
  if (layer.method) {
    return [layer.method.toUpperCase() + " " + path];
  } else if (layer.route) {
    return getRoutesOfLayer(
      path + split(layer.route.path),
      layer.route.stack[0]
    );
  } else if (layer.name === "router" && layer.handle.stack) {
    let routes: string[] = [];

    layer.handle.stack.forEach(function (stackItem: any) {
      routes = routes.concat(
        getRoutesOfLayer(path + split(layer.regexp), stackItem)
      );
    });

    return routes;
  }

  return [];
}
function split(thing: any): string {
  if (typeof thing === "string") {
    return thing;
  } else if (thing.fast_slash) {
    return "";
  } else {
    var match = thing
      .toString()
      .replace("\\/?", "")
      .replace("(?=\\/|$)", "$")
      .match(/^\/\^((?:\\[.*+?^${}()|[\]\\\/]|[^.*+?^${}()|[\]\\\/])*)\$\//);
    return match
      ? match[1].replace(/\\(.)/g, "$1")
      : "<complex:" + thing.toString() + ">";
  }
}

function getRoutes(app: Application): string[] {
  let routes: string[] = [];

  app._router.stack.forEach(function (layer: any) {
    routes = routes.concat(getRoutesOfLayer("", layer));
  });

  return routes;
}