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   1 ;;; riece-rdcc.el --- ruby implementation of DCC add-on
   2 ;; Copyright (C) 1998-2003 Daiki Ueno
   3
   4 ;; Author: Daiki Ueno <ueno@unixuser.org>
   5 ;; Keywords: IRC, riece
   6
   7 ;; This file is part of Riece.
   8
   9 ;; This program is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; This program is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24 ;;; Code:
  25
  26 (require 'riece-globals)
  27 (require 'riece-misc)
  28 (require 'riece-channel)
  29 (require 'riece-identity)
  30 (require 'riece-ctcp)                   ;for riece-ctcp-additional-clientinfo
  31
  32 (defgroup riece-rdcc nil
  33   "DCC implementation using ruby"
  34   :prefix "riece-"
  35   :group 'riece)
  36
  37 (defcustom riece-rdcc-server-address nil
  38   "Local address of the DCC server.
  39 Only used for sending files."
  40   :type 'string
  41   :group 'riece-rdcc)
  42
  43 (defcustom riece-rdcc-ruby-command "ruby"
  44   "Command name for Ruby interpreter."
  45   :type 'string
  46   :group 'riece-rdcc)
  47
  48 (defcustom riece-rdcc-send-program
  49   '("\
  50 address = " address "
  51 unless address
  52   sock = UDPSocket.new
  53   sock.connect('164.46.176.4', 7)               # www.unixuser.org/echo
  54   address = sock.getsockname[4 .. 7].unpack('CCCC').join('.')
  55 end
  56 server = TCPServer.new(address, 0)
  57 puts(\"#{server.addr[3].split(/\\./).collect{|c| c.to_i}.pack('CCCC').unpack('N')[0]} #{server.addr[1]}\")
  58 $stdout.flush
  59 session = server.accept
  60 if session
  61   total = 0
  62   File.open(" file ") {|file|
  63     while (bytes = file.read(" block-size "))
  64       total += bytes.length
  65       puts(\"#{total}\")
  66       session.write(bytes)
  67     end
  68   }
  69   session.close
  70 end
  71 ")
  72   "Ruby program to send file with DCC."
  73   :type 'list
  74   :group 'riece-rdcc)
  75
  76 (defcustom riece-rdcc-decode-address-program
  77   '("\
  78 puts(\"#{" address " >> 24 & 0xFF}.#{" address " >> 16 & 0xFF}.#{"
  79     address " >> 8 & 0xFF}.#{" address " & 0xFF}\")")
  80   "Ruby program to numeric IP address."
  81   :type 'list
  82   :group 'riece-rdcc)
  83
  84 (defcustom riece-rdcc-save-directory nil
  85   "Default directory where received files are saved in."
  86   :type 'directory
  87   :group 'riece-rdcc)
  88
  89 (defcustom riece-rdcc-block-size 4096
  90   "Number of bytes sent as a block."
  91   :type 'integer
  92   :group 'riece-rdcc)
  93
  94 (defvar riece-rdcc-requests nil)
  95
  96 (defvar riece-rdcc-request-user nil)
  97 (defvar riece-rdcc-request-file nil)
  98 (defvar riece-rdcc-request-size nil)
  99
 100 (defvar riece-rdcc-temp-file nil)
 101 (defvar riece-rdcc-received-size nil)
 102
 103 (defvar riece-rdcc-enabled nil)
 104
 105 (defconst riece-rdcc-description
 106   "DCC file sending extension implemented in Ruby")
 107
 108 (defvar temporary-file-directory)
 109 (defvar jka-compr-compression-info-list)
 110 (defvar jam-zcat-filename-list)
 111 (defun riece-rdcc-substitute-variables (program variable value)
 112   (setq program (copy-sequence program))
 113   (let ((pointer program))
 114     (while pointer
 115       (setq pointer (memq variable program))
 116       (if pointer
 117           (setcar pointer value)))
 118     program))
 119
 120 (defun riece-rdcc-server-filter (process input)
 121   (save-excursion
 122     (set-buffer (process-buffer process))
 123     (goto-char (point-max))
 124     (insert input)
 125     (goto-char (point-min))
 126     (while (and (not (eobp))
 127                 (looking-at "\\([0-9]+\\)\n"))
 128       (message "Sending %s...(%s/%d)"
 129                riece-rdcc-request-file
 130                (match-string 1) riece-rdcc-request-size)
 131       (forward-line))
 132     (unless (eobp)
 133       (delete-region (point-min) (point)))))
 134
 135 (defun riece-rdcc-server-sentinel (process status)
 136   (with-current-buffer (process-buffer process)
 137     (message "Sending %s...done" riece-rdcc-request-file))
 138   (kill-buffer (process-buffer process)))
 139
 140 (defun riece-command-dcc-send (user file)
 141   (interactive
 142    (let ((completion-ignore-case t))
 143      (list (riece-completing-read-identity
 144             "User: "
 145             (riece-get-users-on-server (riece-current-server-name)))
 146            (expand-file-name (read-file-name "File: ")))))
 147   (let* ((process-connection-type nil)
 148          (process (start-process "DCC" (generate-new-buffer " *DCC*")
 149                                  "ruby" "-rsocket")))
 150     (process-send-string process
 151                          (apply #'concat
 152                                 (riece-rdcc-substitute-variables
 153                                  (riece-rdcc-substitute-variables
 154                                   (riece-rdcc-substitute-variables
 155                                    riece-rdcc-send-program
 156                                    'address
 157                                    (if riece-rdcc-server-address
 158                                        (concat "'" riece-rdcc-server-address
 159                                                "'")
 160                                      "nil"))
 161                                   'file
 162                                   (concat "'" file "'"))
 163                                  'block-size
 164                                  (number-to-string riece-rdcc-block-size))))
 165     (process-send-eof process)
 166     (save-excursion
 167       (set-buffer (process-buffer process))
 168       (while (and (eq (process-status process) 'run)
 169                   (progn
 170                     (goto-char (point-min))
 171                     (not (looking-at "\\([0-9]+\\) \\([0-9]+\\)"))))
 172         (accept-process-output process))
 173       (if (eq (process-status process) 'run)
 174           (let ((address (match-string 1))
 175                 (port (match-string 2)))
 176             (erase-buffer)
 177             (make-local-variable 'riece-rdcc-request-size)
 178             (setq riece-rdcc-request-file file
 179                   riece-rdcc-request-size (nth 7 (file-attributes file)))
 180             (set-buffer-modified-p nil)
 181             (set-process-filter process #'riece-rdcc-server-filter)
 182             (set-process-sentinel process #'riece-rdcc-server-sentinel)
 183             (riece-send-string
 184              (format "PRIVMSG %s :\1DCC SEND %s %s %s %d\1\r\n"
 185                      (riece-identity-prefix user)
 186                      (file-name-nondirectory file)
 187                      address port
 188                      riece-rdcc-request-size)))))))
 189
 190 (defun riece-rdcc-filter (process input)
 191   (save-excursion
 192     (set-buffer (process-buffer process))
 193     (erase-buffer)
 194     (insert input)
 195     (let ((coding-system-for-write 'binary)
 196           jka-compr-compression-info-list jam-zcat-filename-list)
 197       (write-region (point-min) (point-max) riece-rdcc-temp-file t 0))
 198     (message "Receiving %s from %s...(%s/%s)"
 199              (file-name-nondirectory riece-rdcc-request-file)
 200              riece-rdcc-request-user
 201              (riece-rdcc-format-size
 202               (setq riece-rdcc-received-size (+ (buffer-size)
 203                                                 riece-rdcc-received-size)))
 204              (riece-rdcc-format-size riece-rdcc-request-size))))
 205
 206 (defun riece-rdcc-sentinel (process status)
 207   (save-excursion
 208     (set-buffer (process-buffer process))
 209     (unless (= riece-rdcc-received-size riece-rdcc-request-size)
 210       (error "Premature end of file"))
 211     (message "Receiving %s from %s...done"
 212              (file-name-nondirectory riece-rdcc-request-file)
 213              riece-rdcc-request-user)
 214     (condition-case nil
 215         (progn
 216           (rename-file riece-rdcc-temp-file riece-rdcc-request-file)
 217           (delete-directory (file-name-directory riece-rdcc-temp-file)))
 218       (file-already-exists
 219        (error "Can't save %s.  Temporarily saved in %s"
 220               riece-rdcc-request-file riece-rdcc-temp-file))))
 221   (kill-buffer (process-buffer process)))
 222
 223 (defun riece-rdcc-decode-address (address)
 224   (with-temp-buffer
 225     (call-process riece-rdcc-ruby-command nil t nil "-e"
 226                   (apply #'concat
 227                          (riece-rdcc-substitute-variables
 228                           riece-rdcc-decode-address-program
 229                           'address
 230                           address)))
 231     (buffer-substring (point-min) (1- (point-max)))))
 232
 233 (defun riece-command-dcc-receive (request file)
 234   (interactive
 235    (progn
 236      (unless riece-rdcc-requests
 237        (error "No request"))
 238      (let* ((request
 239              (if (= (length riece-rdcc-requests) 1)
 240                  (car riece-rdcc-requests)
 241                (with-output-to-temp-buffer "*Help*"
 242                  (let ((requests riece-rdcc-requests)
 243                        (index 1))
 244                    (while requests
 245                      (princ (format "%2d: %s %s (%d bytes)\n"
 246                                     index
 247                                     (car (car requests))
 248                                     (nth 1 (car requests))
 249                                     (nth 4 (car requests))))
 250                      (setq index (1+ index)
 251                            requests (cdr requests)))))
 252                (let ((number (read-string "Request#: ")))
 253                  (unless (string-match "^[0-9]+$" number)
 254                    (error "Not a number"))
 255                  (if (or (> (setq number (string-to-number number))
 256                             (length riece-rdcc-requests))
 257                          (< number 1))
 258                      (error "Invalid number"))
 259                  (nth (1- number) riece-rdcc-requests))))
 260             (default-name (expand-file-name
 261                            (nth 1 request) (or riece-rdcc-save-directory
 262                                                default-directory))))
 263        (list request
 264              (expand-file-name
 265               (read-file-name
 266                (concat "Save as (default "
 267                        (file-name-nondirectory default-name) ") ")
 268                (file-name-directory default-name)
 269                default-name))))))
 270   (let* ((temp-file (expand-file-name
 271                      (file-name-nondirectory file)
 272                      (expand-file-name (make-temp-name "riece-rdcc")
 273                                        (if (featurep 'xemacs)
 274                                            (temp-directory)
 275                                          temporary-file-directory))))
 276          (orig-mode (default-file-modes))
 277          selective-display
 278          (coding-system-for-read 'binary)
 279          (coding-system-for-write 'binary)
 280          process)
 281     (unwind-protect
 282         (progn
 283           (set-default-file-modes 448)
 284           ;; This may throw an error.
 285           (make-directory (file-name-directory temp-file)))
 286       (set-default-file-modes orig-mode))
 287     (setq process (open-network-stream
 288                    "DCC" (generate-new-buffer " *DCC*")
 289                    (riece-rdcc-decode-address (nth 2 request))
 290                    (nth 3 request)))
 291     (setq riece-rdcc-requests (delq request riece-rdcc-requests))
 292     (with-current-buffer (process-buffer process)
 293       (if (fboundp 'set-buffer-multibyte)
 294           (set-buffer-multibyte nil))
 295       (buffer-disable-undo)
 296       (erase-buffer)
 297       (make-local-variable 'riece-rdcc-request-user)
 298       (setq riece-rdcc-request-user (car request))
 299       (make-local-variable 'riece-rdcc-request-file)
 300       (setq riece-rdcc-request-file file)
 301       (make-local-variable 'riece-rdcc-request-size)
 302       (setq riece-rdcc-request-size (nth 4 request))
 303       (make-local-variable 'riece-rdcc-temp-file)
 304       (setq riece-rdcc-temp-file temp-file)
 305       (make-local-variable 'riece-rdcc-received-size)
 306       (setq riece-rdcc-received-size 0))
 307     (set-process-filter process #'riece-rdcc-filter)
 308     (set-process-sentinel process #'riece-rdcc-sentinel)))
 309
 310 (defun riece-rdcc-format-size (size)
 311   (if (< size 1024)
 312       (format "%0.1f" size)
 313     (setq size (/ size 1024.0))
 314     (if (< size 1024)
 315         (format "%0.1fKB" size)
 316       (setq size (/ size 1024.0))
 317       (if (< size 1024)
 318           (format "%0.1fMB" size)
 319         (format "%0.1fGB" (/ size 1024.0))))))
 320
 321 (defun riece-handle-dcc-request (prefix target message)
 322   (let ((case-fold-search t))
 323     (when (and riece-rdcc-enabled
 324                (string-match
 325                 "SEND \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)"
 326                 message))
 327       (let ((file (match-string 1 message))
 328             (address (match-string 2 message))
 329             (port (string-to-number (match-string 3 message)))
 330             (size (string-to-number (match-string 4 message)))
 331             (buffer (if (riece-channel-p target)
 332                         (riece-channel-buffer (riece-make-identity
 333                                                target riece-server-name))))
 334             (user (riece-prefix-nickname prefix)))
 335         (setq riece-rdcc-requests
 336               (cons (list user file address port size)
 337                     riece-rdcc-requests))
 338         (message "%s"
 339                  (with-current-buffer (window-buffer (selected-window))
 340                    (substitute-command-keys
 341                     (format
 342                      "Type \\[riece-command-dcc-receive] to receive"
 343                      user))))
 344         (riece-insert-change buffer (format "DCC SEND from %s: %s (%s)\n"
 345                                             user file
 346                                             (riece-rdcc-format-size size)))
 347         (riece-insert-change
 348          (if (and riece-channel-buffer-mode
 349                   (not (eq buffer riece-channel-buffer)))
 350              (list riece-dialogue-buffer riece-others-buffer)
 351            riece-dialogue-buffer)
 352          (concat
 353           (riece-concat-server-name
 354            (format "DCC SEND from %s (%s) to %s: %s (%s)"
 355                    user
 356                    (riece-strip-user-at-host
 357                     (riece-prefix-user-at-host prefix))
 358                    (riece-decode-coding-string target)
 359                    file
 360                    (riece-rdcc-format-size size)))
 361           "\n")))
 362       t)))
 363
 364 (defun riece-rdcc-requires ()
 365   '(riece-ctcp))
 366
 367 (defvar riece-dialogue-mode-map)
 368 (defun riece-rdcc-insinuate ()
 369   (add-to-list 'riece-ctcp-additional-clientinfo "DCC")
 370   (add-hook 'riece-ctcp-dcc-request-hook 'riece-handle-dcc-request))
 371
 372 (defun riece-rdcc-enable ()
 373   (define-key riece-dialogue-mode-map "\C-ds" 'riece-command-dcc-send)
 374   (define-key riece-dialogue-mode-map "\C-dr" 'riece-command-dcc-receive)
 375   (setq riece-rdcc-enabled t))
 376
 377 (defun riece-rdcc-disable ()
 378   (define-key riece-dialogue-mode-map "\C-ds" nil)
 379   (define-key riece-dialogue-mode-map "\C-dr" nil)
 380   (setq riece-rdcc-enabled nil))
 381
 382 (provide 'riece-rdcc)
 383
 384 ;;; riece-rdcc.el ends here