45 lines
1.8 KiB
Scheme
45 lines
1.8 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014 David Thompson <davet@gnu.org>
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;;; Copyright © 2015, 2016 Eric Bavier <bavier@member.fsf.org>
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;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix import json)
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#:use-module (json)
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#:use-module (guix http-client)
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#:use-module (guix import utils)
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#:use-module (srfi srfi-34)
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#:export (json-fetch))
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(define* (json-fetch url
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;; Note: many websites returns 403 if we omit a
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;; 'User-Agent' header.
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#:key (headers `((user-agent . "GNU Guile")
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(Accept . "application/json"))))
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"Return a representation of the JSON resource URL (a list or hash table), or
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#f if URL returns 403 or 404. HEADERS is a list of HTTP headers to pass in
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the query."
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(guard (c ((and (http-get-error? c)
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(let ((error (http-get-error-code c)))
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(or (= 403 error)
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(= 404 error))))
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#f))
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(let* ((port (http-fetch url #:headers headers))
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(result (json->scm port)))
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(close-port port)
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result)))
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