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Path matching in Zuplo uses the popular npmjs package path-to-regexp - you can learn even more about it on their repo.

The most basic path is / which will simple match the root path. You can add other static paths like /foo and /foo/bar

Dynamic Paths

Path-to-regex supports dynamic matching including a feature that will parameterize parts of the URL. For example:

Path: /products/:productId/sizes/:size will match the following paths

/products/pizza/size/small and set the params object on request to:

"productId": "pizza",
"size": "small"

Query-strings (or search parameters) will not affect path matching.

Regular Expressions and Wildcards

You can also use regular expressions in your paths. They must be contained in () to indicate to path-to-regexp that they are regex.


Path /(.*) will match anything.


This is a true wildcard route and can be used for custom 404s by making this the last route in your routes.json (and matching all methods).

Path /(a?b) will match either /ab or /b.

Path /main/(a|b) will match /main/a or /main/b.

Path /icon-(\d++).png will match /icon-1234.png or any other series of digits for 1234.

Named groups

You can also name your regexp groups so that they appear as named parameters.

Path products/:productId/icons/icon-:imageIndex(\d+).png will match /products/pizza/icons/icon-2.png and produce a request.params object as follows:

"productId": "pizza",
"imageIndex": "2"

Not supported

Note that not all regex features are available, us of the following will either be ignored or result in an error, including

  • (?:...) - named matches
  • ^ or $ - start or end of string
  • [abc] - character classes

Route tester

There is a simple route tester available that can be used to debug route matching with path-to-regexp.