forked from cadence/breezewiki
35 lines
1.1 KiB
Racket
35 lines
1.1 KiB
Racket
|
#lang racket/base
|
||
|
|
(require racket/contract
|
||
|
|
racket/match
|
||
|
|
racket/path
|
||
|
|
racket/runtime-path
|
||
|
|
racket/string)
|
||
|
|
|
||
|
|
(provide
|
||
|
|
(contract-out
|
||
|
|
[ext->mime-type (-> bytes? bytes?)]
|
||
|
|
[mime-type->ext (-> bytes? bytes?)]))
|
||
|
|
|
||
|
|
(define-runtime-path mime.types-path "mime.types")
|
||
|
|
|
||
|
|
(define ls
|
||
|
|
(call-with-input-file mime.types-path
|
||
|
|
(λ (in) (for/list ([line (in-lines in)]
|
||
|
|
#:when (not (regexp-match? #rx"^ *($|#)" line)))
|
||
|
|
(match line
|
||
|
|
[(regexp #rx"^([^ ]+) +(.+)$" (list _ mime ext))
|
||
|
|
(cons (string->bytes/utf-8 ext) (string->bytes/utf-8 mime))]
|
||
|
|
[(regexp #rx"^ *#") (void)]
|
||
|
|
[_ (log-warning "mime-types: failed to parse line ~s" line)])))))
|
||
|
|
|
||
|
|
(define forward-hash (make-immutable-hash ls))
|
||
|
|
(define reverse-hash (make-immutable-hash (map (λ (x) (cons (cdr x) (car x))) ls)))
|
||
|
|
|
||
|
|
(define (ext->mime-type ext-in)
|
||
|
|
(define ext (regexp-replace #rx"^\\." ext-in #""))
|
||
|
|
(hash-ref forward-hash ext))
|
||
|
|
|
||
|
|
(define (mime-type->ext m-in)
|
||
|
|
(define m (regexp-replace #rx";.*" m-in #""))
|
||
|
|
(hash-ref reverse-hash m))
|