base.lisp

   1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10; Package: modlisp -*-
   2 ;;;; *************************************************************************
   3 ;;;; FILE IDENTIFICATION
   4 ;;;;
   5 ;;;; Name:          base.lisp
   6 ;;;; Purpose:       Utility functions for modlisp package
   7 ;;;; Programmer:    Kevin M. Rosenberg
   8 ;;;; Date Started:  Dec 2002
   9 ;;;;
  10 ;;;; $Id: base.lisp,v 1.3 2003/07/05 00:51:04 kevin Exp $
  11 ;;;; *************************************************************************
  12
  13 (in-package #:modlisp)
  14
  15
  16 (let ((*listener-socket* nil)
  17       (*listener-process* nil))
  18
  19   (defun modlisp-start (&key (port +default-apache-port+)
  20                              (function 'demo-apache-command-processor))
  21     (handler-case
  22         (make-socket-server (next-server-name) function port
  23                             :format :text :wait nil)
  24       (error (e)
  25         (format t "~&Error while trying to start modlisp server~&  ~A" e)
  26         (decf *listener-count*)
  27         nil)
  28       (:no-error (process socket)
  29         (setq *listener-socket* socket)
  30         (setq *listener-process* process)
  31         process)))
  32
  33   (defun modlisp-stop ()
  34     (when *listener-process*
  35       (format t "~&; killing modlisp server process ~A~%" *listener-process*)
  36       (handler-case
  37           (progn
  38             #+sbcl (sb-thread:destroy-thread *listener-process*)
  39             #+cmucl (mp:destroy-process *listener-process*)
  40             #+allegro (mp:process-kill *listener-process*)
  41             #+allegro (mp:process-allow-schedule)
  42             #+lispworks (mp:process-kill *listener-process*))
  43         (error (e)
  44           (format t "~&Error while trying to kill modlisp server~&  ~A" e))
  45         (:no-error (res)
  46           (declare (ignore res))
  47           (setq *listener-process* nil))))
  48     (when *listener-socket*
  49       (ignore-errors (close *listener-socket*))
  50       (setq *listener-socket* nil)))
  51
  52  ) ;; closure
  53
  54 (defun next-server-name ()
  55   (format nil "modlisp-socket-server-~d" (incf *listener-count*)))
  56
  57 (defun next-worker-name ()
  58   (format nil "modlisp-worker-~d" (incf *worker-count*)))
  59
  60 (let ((*number-server-requests* 0)
  61       (*number-worker-requests* 0)
  62       (*close-apache-socket* t))
  63
  64   (defun apache-command-issuer (*apache-socket* processor-fun)
  65     "generates commands from apache, issues commands to processor-fun"
  66     (unwind-protect
  67          (progn
  68            (setq *number-worker-requests* 0)
  69            (do ((command (read-apache-command) (read-apache-command)))
  70                ((null command) 'done)
  71              (funcall processor-fun command)
  72              (force-output *apache-socket*)
  73              (incf *number-worker-requests*)
  74              (incf *number-server-requests*)
  75              (when *close-apache-socket*
  76                (return))))
  77       (close *apache-socket*)))
  78
  79   (defun get-number-worker-requests ()
  80     *number-worker-requests*)
  81
  82   (defun get-number-server-requests ()
  83     *number-server-requests*)
  84
  85   (defun set-close-apache-socket (close?)
  86     (setq *close-apache-socket* close?))
  87
  88   ) ;; closure
  89
  90 (defun read-apache-command ()
  91   (ignore-errors
  92     (let* ((header (read-apache-header))
  93           (content-length (cdr (assoc "content-length" header :test #'equal)))
  94           (content (when content-length
  95                      (make-string
  96                       (parse-integer content-length :junk-allowed t)))))
  97      (when content
  98        (read-sequence content *apache-socket*)
  99        (push (cons "posted-content" content) header))
 100      header)))
 101
 102 (defun read-apache-header ()
 103   (loop for key = (read-line *apache-socket* nil nil)
 104                         while (and key
 105                                    (string-not-equal key "end")
 106                                    (> (length key) 1))
 107                       for value = (read-line *apache-socket* nil nil)
 108                       collect (cons key value)))
 109
 110 (defun write-header-line (key value)
 111   (write-string key *apache-socket*)
 112   (write-char #\NewLine *apache-socket*)
 113   (write-string value *apache-socket*)
 114   (write-char #\NewLine *apache-socket*))
 115
 116 (defun header-value (command key)
 117   (cdr (assoc key command :test #'string=)))
 118