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import: github: Request API v3 in the 'Accept' header.

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* guix/import/json.scm (json-fetch): Add #:headers argument and honor it.
* guix/import/github.scm (latest-released-version): Pass #:headers to
'json-fetch'.
This commit is contained in:
Ludovic Courtès 2018-08-20 15:11:14 +02:00
parent a50eed201b
commit 2766282f5a
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GPG Key ID: 090B11993D9AEBB5
2 changed files with 16 additions and 7 deletions
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9
guix/import/github.scm
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@ -1,6 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Ben Woodcroft <donttrustben@gmail.com>
;;; Copyright © 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -132,7 +132,12 @@ the package e.g. 'bedtools2'. Return #f if there is no releases"
(json (json-fetch
(if token
(string-append api-url "?access_token=" token)
api-url))))
api-url)
#:headers
;; Ask for version 3 of the API as suggested at
;; <https://developer.github.com/v3/>.
`((Accept . "application/vnd.github.v3+json")
(user-agent . "GNU Guile")))))
(if (eq? json #f)
(if token
(error "Error downloading release information through the GitHub

14
guix/import/json.scm
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@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 David Thompson <davet@gnu.org>
;;; Copyright © 2015, 2016 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -25,17 +26,20 @@
#:export (json-fetch
json-fetch-alist))
(define (json-fetch url)
(define* (json-fetch url
;; Note: many websites returns 403 if we omit a
;; 'User-Agent' header.
#:key (headers `((user-agent . "GNU Guile")
(Accept . "application/json"))))
"Return a representation of the JSON resource URL (a list or hash table), or
#f if URL returns 403 or 404."
#f if URL returns 403 or 404. HEADERS is a list of HTTP headers to pass in
the query."
(guard (c ((and (http-get-error? c)
(let ((error (http-get-error-code c)))
(or (= 403 error)
(= 404 error))))
#f))
;; Note: many websites returns 403 if we omit a 'User-Agent' header.
(let* ((port (http-fetch url #:headers '((user-agent . "GNU Guile")
(Accept . "application/json"))))
(let* ((port (http-fetch url #:headers headers))
(result (json->scm port)))
(close-port port)
result)))