Gorilla mux optional query values

user_3932491 0
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I've been working on a Go project where gorilla/mux is used as the router.

I need to be able to have query values associated with a route, but these values should be optional. That means that I'd like to catch both /articles/123 and /articles/123?key=456 in the same handler.

To accomplish so I tried using the r.Queries method that accepts key/value pairs: router.

  Path("/articles/{id:[0-9]+}").Queries("key", "{[0-9]*?}")

but this makes only the value (456) optional, but not the key. So both /articles/123?key=456 and /articles/123?key= are valid, but not /articles/123.

Edit: another requirement is that, after registering the route, I'd like to build them programatically, and I can't seem to work out how to use r.Queries even though the docs specifically state that it's possible (https://github.com/gorilla/mux#registered-urls).

@jmaloney answer works, but doesn't allow to build URLs from names.

gorilla mux go
3 Answers

Seems like the best way to handle optional URL parameters is to define your router as normal without them, then parse the optional params out like this:

urlParams := request.URL.Query()

This returns a map that contains the URL parameters as Key/Value pairs.

user_13044620
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