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substitute: Validate substitute URLs. 

Reported by Maxim Cournoyer <maxim.cournoyer@gmail.com>
at <https://lists.gnu.org/archive/html/guix-devel/2017-04/msg00548.html>.

* guix/scripts/substitute.scm (validate-uri): New procedure.
(guix-substitute): Use it.
This commit is contained in:
Ludovic Courtès 2017-05-02 12:28:23 +02:00
parent 49f9d7f697
commit 8a2105078b
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guix/scripts/substitute.scm
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@ -980,6 +980,10 @@ default value."
(and number (max 20 (- number 1))))))
80))
(define (validate-uri uri)
(unless (string->uri uri)
(leave (_ "~a: invalid URI~%") uri)))
(define (guix-substitute . args)
"Implement the build daemon's substituter protocol."
(mkdir-p %narinfo-cache-directory)
@ -1001,6 +1005,9 @@ default value."
(newline)
(force-output (current-output-port))
;; Sanity-check %CACHE-URLS so we can provide a meaningful error message.
(for-each validate-uri %cache-urls)
;; Attempt to install the client's locale, mostly so that messages are
;; suitably translated.
(match (or (find-daemon-option "untrusted-locale")