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 1.12 2003/07/11 07:00:57 kevin Exp $
  11 ;;;; *************************************************************************
  12
  13 (in-package #:modlisp)
  14
  15 (defun modlisp-start (&key (port +default-modlisp-port+)
  16                       (processor 'demo-modlisp-command-processor)
  17                       (processor-args nil)
  18                       (catch-errors t)
  19                       timeout
  20                       number-fixed-workers
  21                       remote-host-checker)
  22   (let ((listener (make-instance 'listener :port port
  23                                  :base-name "modlisp"
  24                                  :function 'modlisp-command-issuer
  25                                  :function-args (cons processor processor-args)
  26                                  :format :text
  27                                  :wait nil
  28                                  :catch-errors catch-errors
  29                                  :timeout timeout
  30                                  :number-fixed-workers number-fixed-workers
  31                                  :remote-host-checker remote-host-checker)))
  32     (init/listener listener :start)))
  33
  34
  35 (defun modlisp-stop (listener)
  36   (init/listener listener :stop))
  37
  38 (defun modlisp-stop-all ()
  39   (stop-all/listener))
  40
  41 ;; Internal functions
  42
  43 (defun modlisp-command-issuer (*modlisp-socket* processor &rest args)
  44   "generates commands from modlisp, issues commands to processor-fun"
  45   (unwind-protect
  46        (progn
  47          (let ((*number-worker-requests* 0)
  48                (*close-modlisp-socket* t))
  49            (do ((command (read-modlisp-command) (read-modlisp-command)))
  50                ((null command))
  51              (apply processor command args)
  52              (finish-output *modlisp-socket*)
  53              (incf *number-worker-requests*)
  54              (incf *number-server-requests*)
  55              (when *close-modlisp-socket*
  56                (return)))))
  57     (close-active-socket *modlisp-socket*)))
  58
  59 (defun header-value (header key)
  60   "Returns the value of a modlisp header"
  61   (cdr (assoc key header :test #'string=)))
  62
  63 (defun read-modlisp-command ()
  64   (ignore-errors
  65     (let* ((header (read-modlisp-header))
  66            (content-length (header-value header "content-length"))
  67            (content (when content-length
  68                       (make-string
  69                        (parse-integer content-length :junk-allowed t)))))
  70      (when content
  71        (read-sequence content *modlisp-socket*)
  72        (push (cons "posted-content" content) header))
  73      header)))
  74
  75 (defun read-modlisp-line ()
  76   (kmrcl:string-right-trim-one-char
  77    #\return
  78    (read-line *modlisp-socket* nil nil)))
  79
  80 (defun read-modlisp-header ()
  81   (loop for key = (read-modlisp-line)
  82       while (and key
  83                  (string-not-equal key "end")
  84                  (> (length key) 1))
  85       for value = (read-modlisp-line)
  86       collect (cons key value)))
  87
  88 (defun write-header-line (key value)
  89   (write-string key *modlisp-socket*)
  90   (write-char #\NewLine *modlisp-socket*)
  91   (write-string value *modlisp-socket*)
  92   (write-char #\NewLine *modlisp-socket*))
  93
  94