Joining URI parts in Elixir

Elixir 1.3 introduced a standard way to join URIs.

For example, say we have a base URI for an API: https://api.hashrocket.com and different endpoints on that URI: events, developers, applications.

To join the URI into one properly formatted string:

def endpoint_uri(endpoint) do
  "https://api.hashrocket.com"
  |> URI.merge(endpoint)
  |> URI.to_string()
end

# then call it

endpoint_url("events") # => "https://api.hashrocket.com/events"

URI.merge accepts both strings and URI structs as the first object so you can easily continue adding URI parts to the pipeline including query params:

"https://test.com"
|> URI.merge("events") 
|> URI.merge("?date=today") 
|> URI.to_string()

# => "https://test.com/events?date=today"