co-express-router

co-express-router patches express routers to make them accept generator-based flow-control as middleware, using co.

Install

npm install davidbayo10/co-express-router

Usage

co-express-router can be used to patch Express 4.x 'app' objects and routers individually.

var express = require('express');
var app = express();

// patch the app
require('co-express-router')(app);

co-express-router does not modify the object's prototype. You may also pass a Router instance to co-express-route.

Patching will enable you to pass generators to foo.VERB, foo.use and foo.param.

app.get('/', function*(req, res, next) {
  var userCount = yield db.getUserCount();
  res.end('We have ' + userCount + ' registered users.');
});

Uncaught exceptions will not keep the request lingering. co-express-router will call next(err) (where err is the exception) when an exception is not handled within the generator function body.

app.get('/', function*(req, res, next) {
  var e = new Error("I am an uncaught exception");

  // will call next(e);
  throw e;
});

Use this express middleware for catching the errors

module.exports = function (app) {
  app.use(function (err, req, res, next) {
    const type = err.type || 500;
    console.error('[HTTP:'+ type +']', req.method, req.url);
    console.error(req.headers['user-agent']);
    console.error(err.message || err);
    res.status(type).send(message);
  });
};

You should differentiate routes frontend and backend if necessary

License

MIT