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substitutes: Properly construct URLs.

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Use relative URIs and "resolve-uri-reference" (which implements the algorithm
specified in RFC 3986 section 5.2.2) for building the URL, instead of just
appending strings. This avoids issued if the cache-url ends with a slash.

* guix/substitutes.scm (narinfo-request): Use resolve-uri-reference for
  constructing the url.
This commit is contained in:
Hartmut Goebel 2021-07-08 00:45:41 +02:00
parent f3b20baa4d
commit ccdf7b8006
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1 changed files with 8 additions and 5 deletions
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13
guix/substitutes.scm
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@ -37,7 +37,8 @@
#:use-module ((guix build utils) #:select (mkdir-p dump-port))
#:use-module ((guix build download)
#:select ((open-connection-for-uri
. guix:open-connection-for-uri)))
. guix:open-connection-for-uri)
resolve-uri-reference))
#:use-module (guix progress)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 regex)
@ -155,10 +156,12 @@ indicates that PATH is unavailable at CACHE-URL."
(define (narinfo-request cache-url path)
"Return an HTTP request for the narinfo of PATH at CACHE-URL."
(let ((url (string-append cache-url "/" (store-path-hash-part path)
".narinfo"))
(headers '((User-Agent . "GNU Guile"))))
(build-request (string->uri url) #:method 'GET #:headers headers)))
(let* ((base (string->uri cache-url))
(ref (build-relative-ref
#:path (string-append (store-path-hash-part path) ".narinfo")))
(url (resolve-uri-reference ref base))
(headers '((User-Agent . "GNU Guile"))))
(build-request url #:method 'GET #:headers headers)))
(define (narinfo-from-file file url)
"Attempt to read a narinfo from FILE, using URL as the cache URL. Return #f