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;; Tekuti
;; Copyright (C) 2008 Andy Wingo <wingo at pobox dot com>
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU 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 General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; if not, contact:
;;
;; Free Software Foundation Voice: +1-617-542-5942
;; 59 Temple Place - Suite 330 Fax: +1-617-542-2652
;; Boston, MA 02111-1307, USA gnu@gnu.org
;;; Commentary:
;;
;; This is the main script that will launch tekuti.
;;
;;; Code:
(define-module (tekuti mod-lisp)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 receive)
#:use-module (ice-9 stack-catch)
#:use-module (sxml simple)
#:use-module (sxml transform)
#:use-module (tekuti url)
#:use-module (tekuti util)
#:use-module (tekuti config)
#:use-module (tekuti request)
#:export (event-loop))
;;; thought: ignore SIGPIPE, otherwise apache dying will kill us
(define (read-headers socket)
(define (read-line*)
(let ((line (read-line socket)))
(if (eof-object? line)
(error "unexpected eof")
line)))
(let lp ((keys '()) (values '()))
(let ((k (read-line*)))
(if (string=? k "end")
(reverse (map cons keys values))
(lp (cons k keys) (cons (read-line*) values))))))
(define (write-headers headers port)
(for-each
(lambda (k v)
(format port "~a\n~a\n" k v))
(map car headers) (map cdr headers))
(display "end\n" port))
(define xhtml-doctype
(string-append
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" "
"\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"))
(define (templatize request)
(let-request request (title body)
`(html (head
(title ,(or title "foo")))
(body
,(or body '(p "what"))))))
(define *status-names*
'((200 . "OK")
(404 . "Not Found")
(500 . "Internal Server Error")))
(define (status->string status)
(format #f "~a ~a" status (or (assv-ref *status-names* status)
"Unknown Error")))
(define (write-body request socket)
(display xhtml-doctype socket)
(sxml->xml (templatize request) socket))
(define (connection-received socket sockaddr index handle-request)
(let ((headers (read-headers socket))
(post-data "")) ;; blocks: (read-delimited "" socket)))
(dbg "~a" headers)
(catch
#t
(lambda ()
(let ((res (pk (handle-request
(make-request 'headers headers
'post-data post-data)
index))))
(let-request res ((status 200))
(write-headers `(("Status" . ,(status->string status))
("Content-Type" . "text/html"))
socket)
(write-body res socket))))
(lambda args
(write-headers '(("Status" . "500 Internal Server Error")
("Content-Type" . "text/plain"))
socket)
(write args socket)
(newline)
(with-output-to-port socket backtrace))
(lambda args
(fluid-set! the-last-stack (make-stack #t 2 0))
(apply throw args)))
(close-port socket)))
(define (with-socket proc)
(pk 'listening)
(let ((socket (socket PF_INET SOCK_STREAM 0)))
(bind socket AF_INET (inet-aton *host*) *port*)
(listen socket *backlog*)
(unwind-protect
(proc socket)
(shutdown socket 2))))
(define (inner-loop socket cookie index handle-request maybe-reindex)
(let* ((pair (accept socket))
(fd (car pair))
(sockaddr (cdr pair)))
(receive
(new-cookie new-index) (maybe-reindex cookie index)
(pk new-cookie new-index)
(connection-received (car pair) (cdr pair) new-index handle-request)
(inner-loop socket new-cookie new-index handle-request maybe-reindex))))
(define (event-loop handle-request maybe-reindex)
(with-socket
(lambda (socket)
(inner-loop socket #f #f handle-request maybe-reindex))))
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