Ruby, How to add a param to an URL that you don't know if it has any other param already

Question

I have to add a new param to an indeterminate URL, let\'s say param=value.

In case the actual URL has already params like this

http://url.co         


        

Answer 1

Well, you may also not know if this parameter already exists in url. If you want to replace it with new value in this case, you can do this:

url = 'http://example.com?exists=0&other=3'
params = {'exists' => 1, "not_exists" => 2}
uri = URI.parse url
uri.query = URI.encode_www_form(URI.decode_www_form(uri.query || '').to_h.merge(params))
uri.to_s