blob: 715c4ed11075ea8625500fdb6b928cea181b0635 (
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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
(define-module (webid-oidc server update)
#:use-module (webid-oidc errors)
#:use-module (webid-oidc server resource path)
#:use-module (webid-oidc server resource content)
#:use-module (webid-oidc server precondition)
#:use-module (webid-oidc cache)
#:use-module (webid-oidc fetch)
#:use-module (webid-oidc http-link)
#:use-module (webid-oidc server resource wac)
#:use-module ((webid-oidc stubs) #:prefix stubs:)
#:use-module (webid-oidc rdf-index)
#:use-module ((webid-oidc refresh-token) #:prefix refresh:)
#:use-module (web uri)
#:use-module (web client)
#:use-module (web response)
#:use-module (rdf rdf)
#:use-module (turtle tordf)
#:use-module (turtle fromrdf)
#:use-module (rnrs bytevectors)
#:use-module (ice-9 exceptions)
#:use-module (ice-9 receive)
#:use-module (ice-9 optargs)
#:use-module (ice-9 iconv)
#:use-module (ice-9 textual-ports)
#:use-module (ice-9 binary-ports)
#:use-module (ice-9 threads)
#:use-module (ice-9 hash-table)
#:use-module (rnrs bytevectors)
#:use-module (oop goops)
#:export
(
update
))
(define (remove-containment-triples doc-uri content-type content)
(case content-type
((text/turtle)
#t)
(else
(raise-exception (make-unsupported-media-type content-type))))
(let ((graph (fetch
doc-uri
#:http-get
(lambda (uri . args)
(values
(build-response #:headers `((content-type ,content-type)))
content)))))
(with-index
graph
(lambda (rdf-match)
(let ((containment-triples
(rdf-match (uri->string doc-uri)
"http://www.w3.org/ns/auth/acl#contains"
#f)))
(let ((blacklist
(alist->hash-table
(map (lambda (t)
(cons t #t))
containment-triples))))
(let ((not-blacklisted?
(lambda (t)
(not
(hash-ref blacklist t #f)))))
(let ((final-graph
(filter not-blacklisted? graph)))
(if (null? containment-triples)
content
(rdf->turtle final-graph))))))))))
(define* (update server-name owner user path if-match if-none-match
content-type content
#:key
(http-get http-get))
(define updated-etag #f)
(with-session
(lambda (load-content-type load-contained load-static-content
do-create do-delete)
(receive (base-path path-type)
(base-path path)
(update-path
base-path
(lambda (main-etag auxiliary)
(let ((relevant-etag
(if path-type
(assoc-ref auxiliary path-type)
main-etag)))
(if relevant-etag
;; The resource exists, so we need write permission
(check-acl-can-write server-name path owner user)
;; The resource does not exist yet, so we only need
;; append permission
(check-acl-can-append server-name path owner user))
(check-precondition path if-match if-none-match relevant-etag)
(set! updated-etag
(do-create content-type
(if relevant-etag
(load-contained relevant-etag)
(if (container-path? path)
'()
#f))
(if (container-path? path)
(remove-containment-triples
(build-uri (uri-scheme server-name)
#:userinfo (uri-userinfo server-name)
#:host (uri-host server-name)
#:port (uri-port server-name)
#:path path)
content-type content)
content)))
(let ((new-main-etag
(if path-type
main-etag
updated-etag))
(new-auxiliary
(if path-type
(cons
`(,path-type . ,updated-etag)
(filter
(lambda (auxiliary)
(let ((needs-description? (not (eq? content-type 'text/turtle)))
(is-describedby?
(equal?
(car auxiliary)
(string->uri
"https://www.w3.org/ns/iana/link-relations/relation#describedby")))
(is-path-type?
(equal? (car auxiliary) path-type)))
(and (not is-path-type?)
(or (not is-describedby?) needs-description?))))
(or auxiliary '())))
(if (eq? content-type 'text/turtle)
(or auxiliary '())
(cons
`(,(string->uri
"https://www.w3.org/ns/iana/link-relations/relation#describedby")
. ,(do-create 'text/turtle #f ""))
(or auxiliary '()))))))
(unless new-main-etag
;; Trying to update an auxiliary resource for a
;; resource that does not exist
(set! new-main-etag
(do-create 'text/turtle
(if (container-path? path)
'()
#f)
"")))
(values new-main-etag new-auxiliary))))
load-content-type load-contained load-static-content do-create do-delete
#:create-intermediate-containers? #t))))
updated-etag)
|
