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;; disfluid, 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 resource-server)
#:use-module (webid-oidc errors)
#:use-module (webid-oidc provider-confirmation)
#:use-module (webid-oidc jwk)
#:use-module (webid-oidc dpop-proof)
#:use-module (webid-oidc serve)
#:use-module (webid-oidc server endpoint)
#:use-module (webid-oidc server endpoint authentication)
#:use-module (webid-oidc server endpoint resource-server)
#:use-module ((webid-oidc server create) #:prefix ldp:)
#:use-module ((webid-oidc server read) #:prefix ldp:)
#:use-module ((webid-oidc server update) #:prefix ldp:)
#:use-module ((webid-oidc server delete) #:prefix ldp:)
#:use-module ((webid-oidc server resource wac) #:prefix wac:)
#:use-module ((webid-oidc server resource path) #:prefix ldp:)
#:use-module ((webid-oidc server resource content) #:prefix ldp:)
#:use-module (webid-oidc server precondition)
#:use-module (webid-oidc server endpoint)
#:use-module (webid-oidc server endpoint authentication)
#:use-module (webid-oidc http-link)
#:use-module ((webid-oidc parameters) #:prefix p:)
#:use-module ((webid-oidc config) #:prefix cfg:)
#:use-module (webid-oidc jti)
#:use-module (webid-oidc access-token)
#:use-module (web request)
#:use-module (web response)
#:use-module (web uri)
#:use-module (web server)
#: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
#:export
(
make-authenticator
make-resource-server
))
(define-class <stub-endpoint> (<endpoint>))
(define return
(make-parameter #f))
(define-method (handle (endpoint <stub-endpoint>) request request-body)
((return) (assq-ref (request-meta request) 'user)))
(define* (make-authenticator #:key (server-uri #f))
(unless (and server-uri (uri? server-uri))
(fail (G_ "You need to pass #:server-uri URI where URI is the public URI of the server, as a (web uri).")))
(let* ((backend (make <stub-endpoint>))
(endpoint (make <authenticator>
#:backend backend
#:server-uri server-uri)))
(lambda (request request-body)
(parameterize ((web-locale request))
(with-exception-handler
(lambda (error)
#f)
(lambda ()
(let/ec ret
(parameterize ((return ret))
(handle endpoint request request-body))))
#:unwind? #t)))))
(define* (make-resource-server
#:key
(server-uri #f)
(owner #f)
(authenticator #f))
(unless owner
(fail (G_ "The owner is not defined.")))
(declare-link-header!)
(define resource-server
(make <resource-server>
#:server-name server-uri
#:owner owner))
(define authenticator
(make <authenticator>
#:backend resource-server
#:server-uri server-uri))
(lambda (request request-body)
(let/ec return
(parameterize ((web-locale request))
(with-exception-handler
(lambda (exn)
(unless (web-exception? exn)
(raise-exception exn))
(return
(build-response
#:code (web-exception-code exn)
#:reason-phrase (web-exception-reason-phrase exn)
#: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")))
(body
,(call-with-input-string
(format #f (W_ "<h1>The resource server request failed</h1>"))
xml->sxml)
,(if (user-message? exn)
(user-message-sxml exn)
(call-with-input-string
(format #f (W_ "<p>No more information.</p>"))
xml->sxml)))))
<>))))
(lambda ()
(receive (response response-body response-meta)
(handle authenticator request request-body)
(return response response-body)))
#:unwind? #t)))))
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