如何在Express中路由具有“深度”变量的URL？

Question

I'm currently learning the MEAN-Stack and writing a tool in my API which multiplies a series of numbers. I have two questions for which the Express Documentation did not provide answers.

1. How can I route for URLs of variable depth? Currently, I'm doing the following:

 router.route('/multiply/:a/:b') .get(function(req,res){ /*multiply*/ return res.send(respone); }); 

As you can see I can only multiply 2 numbers this way, not as many as I like, and this approach routes anything, not just numbers for a & b. So my second question is how do I route only for numbers as a & b?

Regards, Claas M.

Answer 1

You can use a wildcard route to match all numbers and then just do an explosion of the request params yourself:

// matches /multiply/1/3/4/5/32/4 etc...
router.route('/multiply/:numbers([0-9]+)*')
  .get(function(req, res){

    // req.params.numbers will equal /1/3/4/5/32/4
    var numbers = req.params.numbers.split('/');
    // ..
    // multiply numbers
    // ..
    return res.send(answer);

  }); 

Express Route tester is a really useful tool: http://forbeslindesay.github.io/express-route-tester/

Answer 2

After I put far too much effort into this I concluded that it is easier to just use POST instead of putting the data into the URL. But if someone knows a solution I will still be grateful.

 router.route('/multiply/:a/:b') .post(function(req,res){ var array = req.body.numbers; /*multiply*/ return res.send(respone); });