Regex parameters

[punmechanic]

Is there any support for parameter matching using regular expressions? For example, something like this:

router.get(/^foo\/(?param[A-z]*)\/baz$/, function *(param) {
  console.log(param);
});

foo/qux/baz would then print out qux to the console, but foo/0/baz would be ignored.

[alexmingoia]

Regular expressions are not supported. Supporting them makes diffing and concatenation of route paths too complex (used for nesting routers, prefixing, etc.). Also, in the future I plan on optimizing the route matching by using a trie hash, at which point regex's won't be used internally at all.

I suggest using .param() for parameter validation:

router
  .param('bar', function *(bar, next) {
    if (!bar.match(/[A-z]+/)) {
      return this.status = 404;
    }
    yield next;
  })
  .get('/foo/:bar/baz')

[hbakhtiyor]

hi @alexmingoia, still not supported?

[punmechanic]

@hbakhtiyor Looking back on this request I think it wasn't a great idea. There's almost certainly a better way to achieve what you want to do. What problem do you need to solve that requires regex routes?

[hbakhtiyor]

a bit like yours, but make some param is optional
e.g.
foo/qux.baz and make .baz is optional

[punmechanic]

This project uses path-to-regexp for its route matching, so you can use optional parameters without regex.

foo/qux.:paramName(allowedValue|allowedValue2)?

https://github.com/pillarjs/path-to-regexp

This issue should remain closed as the router itself doesn't apply much special logic to paths.