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 1.14 2003/08/18 05:48:55 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* ((server (make-instance 'ml-server
  23                    :processor processor
  24                    :processor-args processor-args
  25                    :port port))
  26          (listener (make-instance 'listener :port port
  27                                   :base-name "modlisp"
  28                                   :function 'modlisp-command-issuer
  29                                   :function-args (list server)
  30                                   :format :text
  31                                   :wait nil
  32                                   :catch-errors catch-errors
  33                                   :timeout timeout
  34                                   :number-fixed-workers number-fixed-workers
  35                                   :remote-host-checker remote-host-checker)))
  36     (setf (listener server) listener)
  37     (init/listener listener :start)
  38     (setf *ml-server* server)
  39     server))
  40
  41
  42 (defun modlisp-stop (server)
  43   (init/listener (listener server) :stop)
  44   (setf (listener server) nil)
  45   server)
  46
  47 (defun modlisp-stop-all ()
  48   (stop-all/listener))
  49
  50 ;; Internal functions
  51
  52 (defun modlisp-command-issuer (*modlisp-socket* server)
  53   "generates commands from modlisp, issues commands to processor-fun"
  54   (unwind-protect
  55        (progn
  56          (let ((*number-worker-requests* 0)
  57                (*close-modlisp-socket* t)
  58                (*ml-server* server))
  59            (do ((command (read-modlisp-command) (read-modlisp-command)))
  60                ((null command))
  61              (apply (processor server) command (processor-args server))
  62              (finish-output *modlisp-socket*)
  63              (incf *number-worker-requests*)
  64              (incf *number-server-requests*)
  65              (when *close-modlisp-socket*
  66                (return)))))
  67     (close-active-socket *modlisp-socket*)))
  68
  69 (defun header-value (header key)
  70   "Returns the value of a modlisp header"
  71   (cdr (assoc key header :test #'eq)))
  72
  73 (defun read-modlisp-command ()
  74   (ignore-errors
  75     (let* ((header (read-modlisp-header))
  76            (content-length (header-value header :content-length))
  77            (content (when content-length
  78                       (make-string
  79                        (parse-integer content-length :junk-allowed t)))))
  80           (when content
  81             (read-sequence content *modlisp-socket*)
  82             (push (cons :posted-content content) header))
  83           header)))
  84
  85
  86 (defun read-modlisp-line ()
  87   (kmrcl:string-right-trim-one-char
  88    #\return
  89    (read-line *modlisp-socket* nil nil)))
  90
  91
  92 (defun read-modlisp-header ()
  93   (loop for key = (read-modlisp-line)
  94       while (and key (string-not-equal key "end"))
  95       for value = (read-modlisp-line)
  96       collect (cons (ensure-keyword key) value)))
  97
  98 (defun write-header-line (key value)
  99   (write-string (string key) *modlisp-socket*)
 100   (write-char #\NewLine *modlisp-socket*)
 101   (write-string value *modlisp-socket*)
 102   (write-char #\NewLine *modlisp-socket*))
 103
 104