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;; disfluid, implementation of the Solid specification
;; Copyright (C) 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 server endpoint client)
#:use-module (webid-oidc server endpoint)
#:use-module (webid-oidc errors)
#:use-module (webid-oidc provider-confirmation)
#:use-module (webid-oidc client-manifest)
#:use-module ((webid-oidc parameters) #:prefix p:)
#:use-module ((webid-oidc config) #:prefix cfg:)
#:use-module (web request)
#:use-module (web response)
#:use-module (web uri)
#:use-module (web server)
#:use-module (web client)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
#:use-module (webid-oidc web-i18n)
#:use-module (ice-9 getopt-long)
#:use-module (ice-9 suspendable-ports)
#:use-module (ice-9 control)
#:use-module (ice-9 match)
#:use-module (ice-9 exceptions)
#:use-module (sxml simple)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:use-module (oop goops)
#:duplicates (merge-generics)
#:declarative? #t
#:re-export
(
client-id
redirect-uris
)
#:export
(
<client-id>
client-name
client-uri
grant-types
response-types
<redirect-uri>
))
(define-class <client-id> (<endpoint> <client-manifest>)
(client-name #:init-keyword #:client-name #:getter client-name)
(client-uri #:init-keyword #:client-uri #:getter client-uri)
(grant-types #:init-keyword #:grant-types #:getter grant-types)
(response-types #:init-keyword #:response-types #:getter response-types)
#:module-name '(webid-oidc server endpoint client))
(define-method (initialize (c <client-id>) initargs)
(next-method)
(let-keywords
initargs #t
((client-name (G_ "Example Solid Application"))
(client-uri (string->uri "https://disfluid.planete-kraus.eu"))
(grant-types '(refresh_token authorization_code))
(response-types '(code)))
(match client-uri
((? string? (= string->uri (? uri? client-uri)))
(slot-set! c 'client-uri client-uri))
((? uri?)
#t)
(else
(scm-error 'wrong-type-arg "make <client-id>"
(G_ "#:client-uri should be an URI")
'()
(list client-uri))))
(let ((fix-symbol-list
(lambda (items what)
(let fix ((values items)
(fixed '())
(index 0))
(match values
((? vector? x)
(fix (vector->list x) fixed index))
(()
(slot-set! c what (reverse fixed)))
(((or (? string? (= string->symbol value))
(? symbol? value))
values ...)
(fix values `(,value @fixed) (+ index 1)))
((wrong _ ...)
(scm-error 'wrong-type-arg "make <client-id>"
(format #f (G_ "#:~a element ~a should be a string or a symbol")
what index)
'()
(list wrong)))
(else
(scm-error 'wrong-type-arg "make <client-id>"
(format #f (G_ "#:~a should be a list")
what)
'()
(list values))))))))
(fix-symbol-list grant-types 'grant-types)
(fix-symbol-list response-types 'response-types))))
(define-method (handle (endpoint <client-id>) request request-body)
(receive (response response-body) (serve endpoint #f)
(let ((if-none-match (request-if-none-match request))
(etag (response-etag response)))
(if (and (list? if-none-match)
etag
(member (car etag) (map car if-none-match)))
(values
(build-response
#:code 304
#:reason-phrase (W_ "reason-phrase|Not Modified")
#:headers `((content-type application/ld+json)
(etag . ,etag)))
#f
'())
(values response response-body '())))))
(define-class <redirect-uri> (<endpoint>))
(define-method (handle (endpoint <redirect-uri>) request request-body)
(format (current-error-port) "Handling a redirect URI… ~a\n" (uri->string (request-uri request)))
(let ((query-args
(apply
append
(map
(lambda (key=value)
(match (map uri-decode (string-split key=value #\=))
((key value)
`((,(string->symbol key) . ,value)))
(else '())))
(string-split (uri-query (request-uri request)) #\&)))))
(format (current-error-port) "Query args: ~s\n" query-args)
(let ((code (assq-ref query-args 'code)))
(format (current-error-port) "Code: ~s\n" code)
(if code
(values
(build-response
#:headers `((content-type application/xhtml+xml)))
(call-with-output-string
(cute sxml->xml
`(*TOP*
(*PI* xml "version=\"1.0\" encoding=\"utf-8\"")
(html (@ (xmlns "http://www.w3.org/1999/xhtml")
(xml:lang ,(W_ "xml-lang|en")))
(head
(title ,(W_ "page-title|Authorization")))
(body
(p ,(W_ "You have been authorized. Please paste the following code in the application:"))
(p (strong ,code)))))
<>))
'())
;; No code:
(raise-exception
(make-exception
(make-web-exception 400 (W_ "reason-phrase|Invalid Request"))
(make-user-message
`(p ,(W_ "This page should obtain a code from your identity provider, but none has been provided.")))))))))
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