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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(4096))
  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 (defvar riece-rdcc-requests nil)
  90
  91 (defvar riece-rdcc-request-user nil)
  92 (defvar riece-rdcc-request-file nil)
  93 (defvar riece-rdcc-request-size nil)
  94
  95 (defvar jka-compr-compression-info-list)
  96 (defvar jam-zcat-filename-list)
  97 (defun riece-rdcc-substitute-variables (program variable value)
  98   (setq program (copy-sequence program))
  99   (let ((pointer program))
 100     (while pointer
 101       (setq pointer (memq variable program))
 102       (if pointer
 103           (setcar pointer value)))
 104     program))
 105
 106 (defun riece-rdcc-server-filter (process input)
 107   (save-excursion
 108     (set-buffer (process-buffer process))
 109     (goto-char (point-max))
 110     (insert input)
 111     (goto-char (point-min))
 112     (while (and (not (eobp))
 113                 (looking-at "\\([0-9]+\\)\n"))
 114       (message "Sending %s...(%s/%d)"
 115                riece-rdcc-request-file
 116                (match-string 1) riece-rdcc-request-size)
 117       (forward-line))
 118     (unless (eobp)
 119       (delete-region (point-min) (point)))))
 120
 121 (defun riece-rdcc-server-sentinel (process status)
 122   (with-current-buffer (process-buffer process)
 123     (message "Sending %s...done" riece-rdcc-request-file))
 124   (kill-buffer (process-buffer process)))
 125
 126 (defun riece-command-dcc-send (user file)
 127   (interactive
 128    (let ((completion-ignore-case t))
 129      (list (riece-completing-read-identity
 130             "User: "
 131             (riece-get-users-on-server (riece-current-server-name)))
 132            (expand-file-name (read-file-name "File: ")))))
 133   (let* ((process-connection-type nil)
 134          (process (start-process "DCC" (generate-new-buffer " *DCC*")
 135                                  "ruby" "-rsocket")))
 136     (process-send-string process
 137                          (apply #'concat
 138                                 (riece-rdcc-substitute-variables
 139                                  (riece-rdcc-substitute-variables
 140                                   riece-rdcc-send-program
 141                                   'address
 142                                   (if riece-rdcc-server-address
 143                                       (concat "'" riece-rdcc-server-address
 144                                               "'")
 145                                     "nil"))
 146                                  'file
 147                                  (concat "'" file "'"))))
 148     (process-send-eof process)
 149     (save-excursion
 150       (set-buffer (process-buffer process))
 151       (while (and (eq (process-status process) 'run)
 152                   (progn
 153                     (goto-char (point-min))
 154                     (not (looking-at "\\([0-9]+\\) \\([0-9]+\\)"))))
 155         (accept-process-output process))
 156       (if (eq (process-status process) 'run)
 157           (let ((address (match-string 1))
 158                 (port (match-string 2)))
 159             (erase-buffer)
 160             (make-local-variable 'riece-rdcc-request-size)
 161             (setq riece-rdcc-request-file file
 162                   riece-rdcc-request-size (nth 7 (file-attributes file)))
 163             (set-buffer-modified-p nil)
 164             (set-process-filter process #'riece-rdcc-server-filter)
 165             (set-process-sentinel process #'riece-rdcc-server-sentinel)
 166             (riece-send-string
 167              (format "PRIVMSG %s :\1DCC SEND %s %s %s %d\1\r\n"
 168                      (riece-identity-prefix user)
 169                      (file-name-nondirectory file)
 170                      address port
 171                      riece-rdcc-request-size)))))))
 172
 173 (defun riece-rdcc-filter (process input)
 174   (save-excursion
 175     (set-buffer (process-buffer process))
 176     (goto-char (point-max))
 177     (insert input)
 178     (message "Receiving %s from %s...(%d/%d)"
 179              (file-name-nondirectory riece-rdcc-request-file)
 180              riece-rdcc-request-user
 181              (1- (point))
 182              riece-rdcc-request-size)))
 183
 184 (defun riece-rdcc-sentinel (process status)
 185   (save-excursion
 186     (set-buffer (process-buffer process))
 187     (unless (= (buffer-size) riece-rdcc-request-size)
 188       (error "Premature end of file"))
 189     (message "Receiving %s from %s...done"
 190              (file-name-nondirectory riece-rdcc-request-file)
 191              riece-rdcc-request-user)
 192     (let ((coding-system-for-write 'binary)
 193           jka-compr-compression-info-list jam-zcat-filename-list)
 194       (write-region (point-min) (point-max) riece-rdcc-request-file)))
 195   (kill-buffer (process-buffer process)))
 196
 197 (defun riece-rdcc-decode-address (address)
 198   (with-temp-buffer
 199     (call-process riece-rdcc-ruby-command nil t nil "-e"
 200                   (apply #'concat
 201                          (riece-rdcc-substitute-variables
 202                           riece-rdcc-decode-address-program
 203                           'address
 204                           address)))
 205     (buffer-substring (point-min) (1- (point-max)))))
 206
 207 (defun riece-command-dcc-receive (request file)
 208   (interactive
 209    (progn
 210      (unless riece-rdcc-requests
 211        (error "No request"))
 212      (let* ((request
 213              (if (= (length riece-rdcc-requests) 1)
 214                  (car riece-rdcc-requests)
 215                (with-output-to-temp-buffer "*Help*"
 216                  (let ((requests riece-rdcc-requests)
 217                        (index 1))
 218                    (while requests
 219                      (princ (format "%2d: %s %s (%d bytes)\n"
 220                                     index
 221                                     (car (car requests))
 222                                     (nth 1 (car requests))
 223                                     (nth 4 (car requests))))
 224                      (setq index (1+ index)
 225                            requests (cdr requests)))))
 226                (let ((number (read-string "Request#: ")))
 227                  (unless (string-match "^[0-9]+$" number)
 228                    (error "Not a number"))
 229                  (if (or (> (setq number (string-to-number number))
 230                             (length riece-rdcc-requests))
 231                          (< number 1))
 232                      (error "Invalid number"))
 233                  (nth (1- number) riece-rdcc-requests))))
 234             (default-name (expand-file-name
 235                            (nth 1 request) (or riece-rdcc-save-directory
 236                                                default-directory))))
 237        (list request
 238              (expand-file-name
 239               (read-file-name
 240                (concat "Save as (default "
 241                        (file-name-nondirectory default-name) ") ")
 242                (file-name-directory default-name)
 243                default-name))))))
 244   (let* (selective-display
 245          (coding-system-for-read 'binary)
 246          (coding-system-for-write 'binary)
 247          (process (open-network-stream
 248                    "DCC" (generate-new-buffer " *DCC*")
 249                    (riece-rdcc-decode-address (nth 2 request))
 250                    (nth 3 request))))
 251     (setq riece-rdcc-requests (delq request riece-rdcc-requests))
 252     (with-current-buffer (process-buffer process)
 253       (if (fboundp 'set-buffer-multibyte)
 254           (set-buffer-multibyte nil))
 255       (buffer-disable-undo)
 256       (erase-buffer)
 257       (make-local-variable 'riece-rdcc-request-user)
 258       (setq riece-rdcc-request-user (car request))
 259       (make-local-variable 'riece-rdcc-request-file)
 260       (setq riece-rdcc-request-file file)
 261       (make-local-variable 'riece-rdcc-request-size)
 262       (setq riece-rdcc-request-size (nth 4 request)))
 263     (set-process-filter process #'riece-rdcc-filter)
 264     (set-process-sentinel process #'riece-rdcc-sentinel)))
 265
 266 (defun riece-handle-dcc-request (prefix target message)
 267   (let ((case-fold-search t))
 268     (when (string-match
 269            "SEND \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)"
 270            message)
 271       (let ((file (match-string 1 message))
 272             (address (match-string 2 message))
 273             (port (string-to-number (match-string 3 message)))
 274             (size (string-to-number (match-string 4 message)))
 275             (buffer (if (riece-channel-p target)
 276                         (riece-channel-buffer (riece-make-identity
 277                                                target riece-server-name))))
 278             (user (riece-prefix-nickname prefix)))
 279         (setq riece-rdcc-requests
 280               (cons (list user file address port size)
 281                     riece-rdcc-requests))
 282         (riece-insert-change buffer (format "DCC SEND from %s\n" user))
 283         (riece-insert-change
 284          (if (and riece-channel-buffer-mode
 285                   (not (eq buffer riece-channel-buffer)))
 286              (list riece-dialogue-buffer riece-others-buffer)
 287            riece-dialogue-buffer)
 288          (concat
 289           (riece-concat-server-name
 290            (format "DCC SEND from %s (%s) to %s"
 291                    user
 292                    (riece-strip-user-at-host
 293                     (riece-prefix-user-at-host prefix))
 294                    (riece-decode-coding-string target)))
 295           "\n")))
 296       t)))
 297
 298 (defun riece-rdcc-requires ()
 299   '(riece-ctcp))
 300
 301 (defvar riece-dialogue-mode-map)
 302 (defun riece-rdcc-insinuate ()
 303   (add-to-list 'riece-ctcp-additional-clientinfo "DCC")
 304   (add-hook 'riece-ctcp-dcc-request-hook 'riece-handle-dcc-request)
 305   (define-key riece-dialogue-mode-map "\C-ds" 'riece-command-dcc-send)
 306   (define-key riece-dialogue-mode-map "\C-dr" 'riece-command-dcc-receive))
 307
 308 (provide 'riece-rdcc)
 309
 310 ;;; riece-rdcc.el ends here