Log all express routes including those on sub routers.

getRoutes.js

    import express from 'express';
    
    let App = express(),
        app_port = process.env.app_port || 11337,
        app_host = process.env.app_host || '127.0.0.1';

    App.listen(app_port, () => {
        console.log(`Server app running on http://${app_host}:${app_port}`);
    });
    
    var getRoutes = function (stack, prefix = '', routesArray = []) {
        for (let i in stack) {
            let obj = {};
            if (stack[i].route && stack[i].route.path) {
                obj.path = prefix + stack[i].route.path;
                obj.method = Object.keys(stack[i].route.methods).shift();
                routesArray.push(obj);
            } else if (stack[i].name === 'router') {
                let path = stack[i].path || '';
                getRoutes(stack[i].handle.stack, prefix + path, routesArray);
            }
        }
        return routesArray;
    };

    console.log(getRoutes(App._router.stack));

getRoutes.v4.16.x.js

// For express >= 4.16.x
import express from 'express';

let App = express(),
    app_port = process.env.app_port || 11337,
    app_host = process.env.app_host || '127.0.0.1';

App.listen(app_port, () => {
    console.log(`Server app running on http://${app_host}:${app_port}`);
});

const getRoutes = function (stack, prefix = '', routesArray = [], routesObj = {}) {
  for (let i in stack) {
    let obj = {};
    if (stack[i].route && stack[i].route.path) {
      obj.path = (prefix + stack[i].route.path)
        .replace(/\/\//g, '/')
        .replace(/\\\//g, '/')
        .replace(/\/$/, '');
      obj.method = Object.keys(stack[i].route.methods).shift();
      if (routesObj[obj.path] === undefined) {
        routesObj[obj.path] = {};
      }

      if (routesObj[obj.path][obj.method] === undefined) {
        routesObj[obj.path][obj.method] = 0;
      }

      routesObj[obj.path][obj.method] += 1;

      routesArray.push(obj);
    } else if (stack[i].name === 'router') {
      let path = stack[i]
        .regexp
        .toString()
        .replace(/^\/\^\\/, '')
        .replace(/(\?\(\?=\\\/\|\$\)\/i)/, '')
        .replace(/\?\$\/i$/, '')
        .replace(/\\\/$/, '')
        .replace(/\\\./g, '.');

      let pref = (prefix + path)
        .replace(/\/\//g, '/')
        .replace(/\\\//g, '/')
        .replace(/\/$/, '');

      getRoutes(stack[i].handle.stack, pref, routesArray, routesObj);
    }
  }
  return { array: routesArray, obj: routesObj };
};

console.log(getRoutes(App._router.stack));