+;;;; -*- 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 "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">
+<HTML><HEAD></HEAD><BODY><TABLE bgcolor=\"#c0c0c0\">
+<TR bgcolor=\"yellow\"><TH COLSPAN=2>ACL 6.2 + mod_lisp 2.0 + apache + Linux</TH></TR>
+<TR bgcolor=\"yellow\"><TH>Key</TH><TH>Value</TH></TR>" s)
+ (format s "<TR bgcolor=\"#F0F0c0\"><TD>apache-nb-use-socket</TD><TD>~a</TD></TR>" *apache-nb-use-socket*)
+ (loop for (key . value) in command do
+ (format s "<TR bgcolor=\"#F0F0c0\"><TD>~a</TD><TD>~a</TD></TR>" key value))
+ (write-string "</TABLE></BODY></HTML>" s)))
+
+(defun fixed-html ()
+ "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">
+<HTML><HEAD></HEAD><BODY><H1>mod_lisp 2.0</H1><P>This is a constant
+ html string sent by mod_lisp</P></BODY></HTML>")