server.js

let endpoints = [];

const print = (path, layer) => {
    if (layer.route) {
        layer.route.stack.forEach(print.bind(null, path.concat(split(layer.route.path))))
    } else if (layer.name === 'router' && layer.handle.stack) {
        layer.handle.stack.forEach(print.bind(null, path.concat(split(layer.regexp))))
    } else if (layer.method) {
        endpoints.push({
            method: layer.method.toUpperCase(),
            path: '/' + path.concat(split(layer.regexp)).filter(Boolean).join('/')
        });
        console.log('%s /%s',
        layer.method.toUpperCase(),
        path.concat(split(layer.regexp)).filter(Boolean).join('/'))
    }
}

const split = (thing) => {
    if (typeof thing === 'string') {
        return thing.split('/')
    } else if (thing.fast_slash) {
        return ''
    } else {
        var match = thing.toString()
        .replace('\\/?', '')
        .replace('(?=\\/|$)', '$')
        .match(/^\/\^((?:\\[.*+?^${}()|[\]\\\/]|[^.*+?^${}()|[\]\\\/])*)\$\//)
        return match
        ? match[1].replace(/\\(.)/g, '$1').split('/')
        : '<complex:' + thing.toString() + '>'
    }
}
const showEndPoints = (app) => {
    endpoints = [];
    app._router.stack.forEach(print.bind(null, []))
    return endpoints;
}

module.exports = showEndPoints;