add url->pollen function

convert.rkt

@@ -1,5 +1,5 @@
 #lang racket/base
-(require sugar txexpr racket/list racket/string pollen/world xml html racket/file racket/match pollen/html)
+(require sugar txexpr racket/list racket/string pollen/world xml html racket/file racket/match pollen/html net/url racket/port)
 
 (define (attrs->pollen attrs)
   (string-join (flatten (map (λ(pair) (list (format "'~a:" (car pair)) (format "\"~a\"" (cadr pair)))) attrs)) " "))
@@ -37,6 +37,13 @@
   ; xexpr-results will be a list with whitespace elements, so strip those out
   (xexpr->pollen #:p-breaks p-breaks (car (filter-not (λ(x) (and (string? x) (regexp-match #px"\\s+" x))) xexpr-results)))) 
 
+
+(define/contract+provide (url->pollen url-or-string #:p-breaks [p-breaks #f])
+  (((or/c string? url?)) (#:p-breaks boolean?) . ->* . string?)
+  (define url (if (string? url-or-string) (string->url url-or-string) url-or-string))
+  (define url-result (port->string (get-pure-port url)))
+  (html->pollen url-result  #:p-breaks p-breaks))
+
 (module+ main
   ; (xexpr->pollen '(p "You are puppy"))
   ; (xexpr->pollen '(p ((class "foo")) "You are puppy"))