(require "comm")
(defconstant +apache-port+ 3000)
(defvar *apache-socket* nil) ;the socket to apache
(defvar *close-apache-socket* nil) ;set to t if you want to close the socket to apache
(defvar *apache-nb-use-socket* 0) ;the number of requests sent in this socket
(defun make-apache-instream (handle)
(mp:process-run-function (format nil "apache socket ~d" handle) '()
'apache-listen (make-instance 'comm:socket-stream :socket handle
:direction :io :element-type 'base-char)))
(defun start-apache-listener ()
(comm:start-up-server :function 'make-apache-instream :service +apache-port+))
(defun apache-listen (*apache-socket*)
(let ((*close-apache-socket* t))
(unwind-protect
(loop for *apache-nb-use-socket* from 0
for command = (get-apache-command)
while command do (process-apache-command command)(force-output *apache-socket*)
until *close-apache-socket*)
(close *apache-socket*))))
(defun get-apache-command ()
(ignore-errors
(let* ((header (loop for key = (read-line *apache-socket* nil nil)
while (and key (string-not-equal key "end"))
for value = (read-line *apache-socket* nil nil)
collect (cons key value)))
(content-length (cdr (assoc "content-length" header :test #'equal)))
(content (when content-length (make-string (parse-integer content-length :junk-allowed t)))))
(when content
(read-sequence content *apache-socket*)
(push (cons "posted-content" content) header))
header)))
(defun write-header-line (key value)
(write-string key *apache-socket*)
(write-char #\NewLine *apache-socket*)
(write-string value *apache-socket*)
(write-char #\NewLine *apache-socket*))
(defun process-apache-command (command)
(let ((html (if (equal (cdr (assoc "url" command :test #'string=)) "/asp/fixed")
(debug-table command)
(fixed-html))))
(write-header-line "Status" "200 OK")
(write-header-line "Content-Type" "text/html")
(write-header-line "Content-Length" (format nil "~d" (length html)))
(write-header-line "Keep-Socket" "1")
(write-string "end" *apache-socket*)
(write-char #\NewLine *apache-socket*)
(write-string html *apache-socket*)
(setf *close-apache-socket* nil)))
(defun debug-table (command)
(with-output-to-string (s)
(write-string "
| Lispworks + mod_lisp 2.0 + apache + FreeBSD |
|---|
| Key | Value |
|---|
" s)
(format s "| apache-nb-use-socket | ~a |
" *apache-nb-use-socket*)
(loop for (key . value) in command do
(format s "| ~a | ~a |
" key value))
(write-string "
" s)))
(defun fixed-html ()
"
mod_lisp 2.0
This is a constant html string sent by mod_lisp 2.0 + Lispworks + apache + FreeBSD
")
;;; A small test bench used to test and time the client/server protocol
(defun fetch-mod-lisp-url (server url &key (nb-fetch 1) (port 3000) close-socket)
(loop with server-socket and reply
repeat nb-fetch
do (unless server-socket
(setf server-socket (comm:open-tcp-stream server port)))
(write-string "url" server-socket)
(write-char #\NewLine server-socket)
(write-string url server-socket)
(write-char #\NewLine server-socket)
(write-string "end" server-socket)
(write-char #\NewLine server-socket)
(force-output server-socket)
(setf reply (read-reply server-socket))
(when close-socket
(close server-socket)
(setf server-socket nil))
finally (return reply)))
(defun read-reply (socket)
(let* ((header (loop for key = (read-line socket nil nil)
while (and key (string-not-equal key "end"))
for value = (read-line socket nil nil)
collect (cons key value)))
(content-length (cdr (assoc "Content-Length" header :test #'string=)))
(content (when content-length (make-string (parse-integer content-length :junk-allowed t)))))
(when content
(read-sequence content socket)
(push (cons "reply-content" content) header))
header))