Passing route control with optional parameter after root in express?

by

That would work depending on what client.get does when passed undefined as its first parameter.

Something like this would be safer:

app.get('/:key?', function(req, res, next) {
    var key = req.params.key;
    if (!key) {
        next();
        return;
    }
    client.get(key, function(err, reply) {
        if(client.get(reply)) {
            res.redirect(reply);
        }
        else {
            res.render('index', {
                link: null
            });
        }
    });
});

There’s no problem in calling next() inside the callback.

According to this, handlers are invoked in the order that they are added, so as long as your next route is app.get(“https://stackoverflow.com/”, …) it will be called if there is no key.

More Related Contents:

  1. Express routes parameter conditions
  2. In express how do I redirect a user to an external url?
  3. Express Router undefined params with router.use when split across files
  4. Allow CORS REST request to a Express/Node.js application on Heroku
  5. What does ‘extended’ mean in express 4.0?
  6. add created_at and updated_at fields to mongoose schemas
  7. How do I setup a SSL certificate for an express.js server?
  8. How can I get Express to output nicely formatted HTML?
  9. Basic HTTP authentication with Node and Express 4
  10. Node.js get image from web and encode with base64
  11. How to force SSL / https in Express.js
  12. Difference between app.all(‘*’) and app.use(‘/’)
  13. How can I render inline JavaScript with Jade / Pug?
  14. What are “res” and “req” parameters in Express functions?
  15. What is a good session store for a single-host Node.js production app?
  16. Express: How to pass app-instance to routes from a different file?
  17. express.js – single routing handler for multiple routes in a single line
  18. 502 Bad Gateway Deploying Express Generator Template on Elastic Beanstalk
  19. Does Express.js support sending unbuffered progressively flushed responses?
  20. Node + Express + Passport: req.user Undefined
  21. Error “npm WARN package.json: No repository field”
  22. How to fix ‘Error: querySrv EREFUSED’ when connecting to MongoDB Atlas?
  23. Express.js req.ip is returning ::ffff:127.0.0.1
  24. What is the difference between res.send and res.write in express?
  25. What is best way to handle global connection of Mongodb in NodeJs
  26. Call a “local” function within module.exports from another function in module.exports?
  27. Mongoose – caused by :: 11000 E11000 duplicate key error index?
  28. Why can’t we do multiple response.send in Express.js?
  29. Node.js: how to limit the HTTP request size and upload file size?
  30. How to store a file with file extension with multer?

Leave a Comment