blob: c027787425550da5c74355f26a3a60706f6c1c27 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
;; webid-oidc, implementation of the Solid specification
;; Copyright (C) 2020, 2021 Vivien Kraus
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU Affero General Public License as
;; published by the Free Software Foundation, either version 3 of the
;; License, or (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU Affero General Public License for more details.
;; You should have received a copy of the GNU Affero General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
(define-module (webid-oidc fetch)
#:use-module (webid-oidc errors)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
#:use-module (rnrs bytevectors)
#:use-module (web client)
#:use-module (web request)
#:use-module (web response)
#:use-module (web uri)
#:use-module (rdf rdf)
#:use-module (turtle tordf)
#:use-module (nquads tordf)
#:use-module (json)
#:use-module (jsonld))
(define*-public (fetch uri #:key (http-get http-get))
(unless (uri? uri)
(set! uri (string->uri uri)))
(with-exception-handler
(lambda (error)
(raise-cannot-fetch-linked-data uri error))
(lambda ()
(receive (response response-body)
(http-get uri
#:headers `((accept (text/turtle application/n-quads application/ld+json))))
(with-exception-handler
(lambda (error)
(raise-unexpected-response response error))
(lambda ()
(unless (eqv? (response-code response) 200)
(raise-request-failed-unexpectedly (response-code response)
(response-reason-phrase response)))
(let ((content-type (response-content-type response)))
(unless (and content-type
(or
(eq? (car content-type) 'text/turtle)
(eq? (car content-type) 'application/n-quads)
(eq? (car content-type) 'text/x-nquads)
(eq? (car content-type) 'application/ld+json))
(or (not (assq-ref (cdr content-type) 'charset))
(equal? (assq-ref (cdr content-type) 'charset) "utf-8")))
(raise-unexpected-header-value 'content-type content-type))
(when (bytevector? response-body)
(set! response-body (utf8->string response-body)))
(with-exception-handler
(lambda (rdf-error)
(raise-not-turtle response-body rdf-error))
(lambda ()
(case (car content-type)
((text/turtle)
(turtle->rdf (string-append
"# This is not a file name\n"
response-body)
(uri->string uri)))
((application/ld+json)
(rdf-dataset-default-graph
(jsonld->rdf (json-string->scm response-body))))
((application/n-quads text/x-nquads)
(nquads->rdf (string-append
"# This is not a file name\n"
response-body)))))))))))))
|
