81 lines
3.2 KiB
Scheme
81 lines
3.2 KiB
Scheme
;;; Guix Data Service -- Information about Guix over time
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;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2019 Christopher Baines <mail@cbaines.net>
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;;;
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;;; This program is free software: you can redistribute it and/or
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;;; modify it under the terms of the GNU Affero General Public License
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;;; as published by the Free Software Foundation, either version 3 of
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;;; the License, or (at your option) any later version.
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;;;
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;;; This program is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; Affero General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU Affero General Public
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;;; License along with this program. If not, see
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;;; <http://www.gnu.org/licenses/>.
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(define-module (guix-data-service web server)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-11)
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#:use-module (ice-9 match)
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#:use-module (web http)
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#:use-module (web request)
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#:use-module (web uri)
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#:use-module (system repl error-handling)
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#:use-module (ice-9 atomic)
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#:use-module (fibers web server)
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#:use-module (guix-data-service web controller)
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#:use-module (guix-data-service web util)
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#:export (start-guix-data-service-web-server))
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(define (check-startup-completed startup-completed)
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(if (atomic-box-ref startup-completed)
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(begin
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;; Just in case this atomic-box-ref is expensive, only do it when
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;; necessary
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(set! check-startup-completed (const #t))
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#t)
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#f))
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(define (handler request body controller secret-key-base startup-completed)
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(display
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(format #f "~a ~a\n"
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(request-method request)
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(uri-path (request-uri request))))
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(apply values
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(let-values (((request-components mime-types)
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(request->path-components-and-mime-type request)))
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(controller request
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(cons (request-method request)
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request-components)
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mime-types
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body
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secret-key-base
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(check-startup-completed startup-completed)))))
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(define* (start-guix-data-service-web-server port host secret-key-base
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startup-completed)
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(call-with-error-handling
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(lambda ()
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(run-server (lambda (request body)
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(handler request body controller
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secret-key-base
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startup-completed))
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#:host host
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#:port port))
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#:on-error 'backtrace
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#:post-error (lambda (key . args)
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(when (eq? key 'system-error)
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(match args
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(("bind" "~A" ("Address already in use") _)
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(simple-format
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(current-error-port)
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"\n
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error: guix-data-service could not start, as it could not bind to port ~A
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Check if it's already running, or whether another process is using that
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port. Also, the port used can be changed by passing the --port option.\n"
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port)))))))
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