;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: modlisp -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name: base.lisp
;;;; Purpose: Utility functions for modlisp package
;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Dec 2002
;;;;
;;;; $Id: base.lisp,v 1.1 2003/07/04 19:52:32 kevin Exp $
;;;; *************************************************************************
(in-package #:modlisp)
(let ((*listener-socket* nil)
(*listener-process* nil))
(defun modlisp-start (&key (port +default-apache-port+)
(function 'sample-process-apache-command))
(handler-case
(make-socket-server (next-server-name) function port :format :text
:wait nil)
(error (e)
(format t "Error ~A" e)
(decf *listener-count*)
nil)
(:no-error (proc socket)
(setq *listener-socket* socket)
(setq *listener-proc* proc)
proc)))
(defun modlisp-stop ()
(when *listener-proc*
(format t "~&; killing ~d~%" *listener-proc*)
#+sbcl (sb-unix:unix-kill *listener-proc* :sigalrm)
#+allegro (mp:process-kill *listener-proc*)
#+allegro (mp:process-allow-schedule)
)
(setq *listener-proc* nil)
(when *listener-socket*
(ignore-errors (close *listener-socket*))
(setq *listener-socket* nil)))
)
(defun next-server-name ()
(format nil "modlisp-socket-server-~d" (incf *listener-count*)))
(defun next-worker-name ()
(format nil "modlisp-worker-~d" (incf *worker-count*)))
(defun apache-command-issuer (*apache-socket*
&optional
(processor-fun 'demo-apache-command-processor))
"generates commands from apache, issues commands to processor-fun"
(let ((*close-apache-socket* t))
(unwind-protect
(loop for *apache-nb-use-socket* from 0
for command = (get-apache-command)
while command
do (funcall processor-fun 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")
(> (length key) 1))
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 header-value (command key)
(cdr (assoc key command :test #'string=)))
;;; Default (demo) processor
(defun demo-apache-command-processor (command)
"Sample function to process an apache command"
(if (equal (header-value command "url") "/asp/fixed")
(fixed-request)
(debug-request command)))
(defun fixed-request ()
(let ((html (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*)
(setq *close-apache-socket* nil)) )
(defun debug-request (command)
(let ((html (debug-table command)))
(write-header-line "Status" "200 OK")
(write-header-line "Content-Type" "text/html")
(write-header-line "Keep-Socket" "0")
(write-string "end" *apache-socket*)
(write-char #\NewLine *apache-socket*)
(write-string html *apache-socket*)
(setq *close-apache-socket* t)) )
(defun debug-table (command)
(with-output-to-string (s)
(write-string "
| ACL 6.2 + mod_lisp 2.0 + apache + Linux |
|---|
| 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
")