#lang racket/base

(require net/url-structs net/url)

(define (path-components uri) (map path/param-path (url-path uri)))

(define (extract-path uri)
  (struct-copy url uri (user #f) (host #f) (port #f) (scheme #f)))

(define (extension uri)
  (let ((match
         (regexp-match
          #rx"\\.([^\\.]+)"
          (car (reverse (path-components uri))))))
    (if match (cadr match) #f)))

(provide path-components extract-path extension)