elmo/elmo-nntp.el

   1 ;;; elmo-nntp.el --- NNTP Interface for ELMO.
   2
   3 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
   4 ;; Copyright (C) 1998,1999,2000 Masahiro MURATA <muse@ba2.so-net.ne.jp>
   5 ;; Copyright (C) 1999,2000      Kenichi OKADA <okada@opaopa.org>
   6
   7 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   8 ;;      Masahiro MURATA <muse@ba2.so-net.ne.jp>
   9 ;;      Kenichi OKADA <okada@opaopa.org>
  10 ;; Keywords: mail, net news
  11
  12 ;; This file is part of ELMO (Elisp Library for Message Orchestration).
  13
  14 ;; This program is free software; you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation; either version 2, or (at your option)
  17 ;; any later version.
  18 ;;
  19 ;; This program is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23 ;;
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  26 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  27 ;; Boston, MA 02111-1307, USA.
  28 ;;
  29
  30 ;;; Commentary:
  31 ;;
  32
  33 ;;; Code:
  34 ;;
  35 (eval-when-compile (require 'cl))
  36
  37 (require 'elmo-vars)
  38 (require 'elmo-util)
  39 (require 'elmo-date)
  40 (require 'elmo-msgdb)
  41 (require 'elmo-cache)
  42 (require 'elmo)
  43 (require 'elmo-net)
  44
  45 (defvar elmo-nntp-overview-fetch-chop-length 200
  46  "*Number of overviews to fetch in one request in nntp.")
  47
  48 (defvar elmo-nntp-use-cache t
  49   "Use cache in nntp folder.")
  50
  51 (defvar elmo-nntp-max-number-precedes-list-active nil
  52   "Non-nil means max number of msgdb is set as the max number of `list active'.
  53 \(Needed for inn 2.3 or later?\).")
  54
  55 (defvar elmo-nntp-group-coding-system nil
  56   "A coding system for newsgroup string.")
  57
  58 (defconst elmo-nntp-folder-name-syntax `(group
  59                                          (?: [user "^\\([A-Za-z]\\|$\\)"])
  60                                          ,@elmo-net-folder-name-syntax))
  61
  62 (defsubst elmo-nntp-encode-group-string (string)
  63   (if elmo-nntp-group-coding-system
  64       (encode-coding-string string elmo-nntp-group-coding-system)
  65     string))
  66
  67 (defsubst elmo-nntp-decode-group-string (string)
  68   (if elmo-nntp-group-coding-system
  69       (decode-coding-string string elmo-nntp-group-coding-system)
  70     string))
  71
  72 ;; For debugging.
  73 (defvar elmo-nntp-debug nil
  74   "Non-nil forces NNTP folder as debug mode.
  75 Debug information is inserted in the buffer \"*NNTP DEBUG*\"")
  76
  77 ;;; Debug
  78 (defsubst elmo-nntp-debug (message &rest args)
  79   (if elmo-nntp-debug
  80       (let ((biff (string-match "BIFF-" (buffer-name)))
  81             pos)
  82         (with-current-buffer (get-buffer-create (concat "*NNTP DEBUG*"
  83                                                         (if biff "BIFF")))
  84           (goto-char (point-max))
  85           (setq pos (point))
  86           (insert (apply 'format message args) "\n")))))
  87
  88 ;;; ELMO NNTP folder
  89 (eval-and-compile
  90   (luna-define-class elmo-nntp-folder (elmo-net-folder)
  91                      (group temp-crosses reads))
  92   (luna-define-internal-accessors 'elmo-nntp-folder))
  93
  94 (luna-define-method elmo-folder-initialize ((folder elmo-nntp-folder) name)
  95   (let ((elmo-network-stream-type-alist
  96          (if elmo-nntp-stream-type-alist
  97              (setq elmo-network-stream-type-alist
  98                    (append elmo-nntp-stream-type-alist
  99                            elmo-network-stream-type-alist))
 100            elmo-network-stream-type-alist))
 101         tokens)
 102     (setq tokens (car (elmo-parse-separated-tokens
 103                        name
 104                        elmo-nntp-folder-name-syntax)))
 105     ;; group
 106     (elmo-nntp-folder-set-group-internal folder
 107                                          (elmo-nntp-encode-group-string
 108                                           (cdr (assq 'group tokens))))
 109     ;; user
 110     (elmo-net-folder-set-user-internal folder
 111                                        (let ((user (cdr (assq 'user tokens))))
 112                                          (if user
 113                                              (and (> (length user) 0) user)
 114                                            elmo-nntp-default-user)))
 115     ;; network
 116     (elmo-net-folder-set-parameters
 117      folder
 118      tokens
 119      (list :server      elmo-nntp-default-server
 120            :port        elmo-nntp-default-port
 121            :stream-type
 122            (elmo-get-network-stream-type elmo-nntp-default-stream-type)))
 123     folder))
 124
 125 (luna-define-method elmo-folder-expand-msgdb-path ((folder elmo-nntp-folder))
 126   (convert-standard-filename
 127    (expand-file-name
 128     (elmo-nntp-folder-group-internal folder)
 129     (expand-file-name (or (elmo-net-folder-server-internal folder) "nowhere")
 130                       (expand-file-name "nntp"
 131                                         elmo-msgdb-directory)))))
 132
 133 (luna-define-method elmo-folder-newsgroups ((folder elmo-nntp-folder))
 134   (list (elmo-nntp-folder-group-internal folder)))
 135
 136 ;;; NNTP Session
 137 (eval-and-compile
 138   (luna-define-class elmo-nntp-session (elmo-network-session)
 139                      (current-group))
 140   (luna-define-internal-accessors 'elmo-nntp-session))
 141
 142 ;;
 143 ;; internal variables
 144 ;;
 145
 146 (defvar elmo-nntp-connection-cache nil
 147   "Cache of NNTP connection.")
 148 ;; buffer local variable
 149
 150 (defvar elmo-nntp-list-folders-use-cache 600
 151   "*Time to cache of list folders, as the number of seconds.
 152 Don't cache if nil.")
 153
 154 (defvar elmo-nntp-list-folders-cache nil)
 155
 156 (defvar elmo-nntp-groups-async nil)
 157 (defvar elmo-nntp-header-fetch-chop-length 200)
 158
 159 (defvar elmo-nntp-read-point 0)
 160
 161 (defvar elmo-nntp-send-mode-reader t)
 162
 163 (defvar elmo-nntp-opened-hook nil)
 164
 165 (defvar elmo-nntp-get-folders-securely nil)
 166
 167 (defvar elmo-nntp-default-use-xover t)
 168
 169 (defvar elmo-nntp-default-use-listgroup t)
 170
 171 (defvar elmo-nntp-default-use-list-active t)
 172
 173 (defvar elmo-nntp-default-use-xhdr t)
 174
 175 (defvar elmo-nntp-server-command-alist nil)
 176
 177
 178 (defconst elmo-nntp-server-command-index '((xover . 0)
 179                                            (listgroup . 1)
 180                                            (list-active . 2)
 181                                            (xhdr . 3)))
 182
 183 (defmacro elmo-nntp-get-server-command (session)
 184   (` (assoc (cons (elmo-network-session-server-internal (, session))
 185                   (elmo-network-session-port-internal (, session)))
 186             elmo-nntp-server-command-alist)))
 187
 188 (defmacro elmo-nntp-set-server-command (session com value)
 189   (` (let (entry)
 190        (unless (setq entry (cdr (elmo-nntp-get-server-command
 191                                  (, session))))
 192          (setq elmo-nntp-server-command-alist
 193                (nconc elmo-nntp-server-command-alist
 194                       (list (cons
 195                              (cons
 196                               (elmo-network-session-server-internal (, session))
 197                               (elmo-network-session-port-internal (, session)))
 198                              (setq entry
 199                                    (vector
 200                                     elmo-nntp-default-use-xover
 201                                     elmo-nntp-default-use-listgroup
 202                                     elmo-nntp-default-use-list-active
 203                                     elmo-nntp-default-use-xhdr)))))))
 204        (aset entry
 205              (cdr (assq (, com) elmo-nntp-server-command-index))
 206              (, value)))))
 207
 208 (defmacro elmo-nntp-xover-p (session)
 209   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 210        (if entry
 211            (aref (cdr entry)
 212                  (cdr (assq 'xover elmo-nntp-server-command-index)))
 213          elmo-nntp-default-use-xover))))
 214
 215 (defmacro elmo-nntp-set-xover (session value)
 216   (` (elmo-nntp-set-server-command (, session) 'xover (, value))))
 217
 218 (defmacro elmo-nntp-listgroup-p (session)
 219   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 220        (if entry
 221            (aref (cdr entry)
 222                  (cdr (assq 'listgroup elmo-nntp-server-command-index)))
 223          elmo-nntp-default-use-listgroup))))
 224
 225 (defmacro elmo-nntp-set-listgroup (session value)
 226   (` (elmo-nntp-set-server-command (, session) 'listgroup (, value))))
 227
 228 (defmacro elmo-nntp-list-active-p (session)
 229   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 230        (if entry
 231            (aref (cdr entry)
 232                  (cdr (assq 'list-active elmo-nntp-server-command-index)))
 233          elmo-nntp-default-use-list-active))))
 234
 235 (defmacro elmo-nntp-set-list-active (session value)
 236   (` (elmo-nntp-set-server-command (, session) 'list-active (, value))))
 237
 238 (defmacro elmo-nntp-xhdr-p (session)
 239   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 240        (if entry
 241            (aref (cdr entry)
 242                  (cdr (assq 'xhdr elmo-nntp-server-command-index)))
 243          elmo-nntp-default-use-xhdr))))
 244
 245 (defmacro elmo-nntp-set-xhdr (session value)
 246   (` (elmo-nntp-set-server-command (, session) 'xhdr (, value))))
 247
 248 (defsubst elmo-nntp-max-number-precedes-list-active-p ()
 249   elmo-nntp-max-number-precedes-list-active)
 250
 251 (defsubst elmo-nntp-folder-postfix (user server port type)
 252   (concat
 253    (and user (concat ":" user))
 254    (if (and server
 255             (null (string= server elmo-nntp-default-server)))
 256        (concat "@" server))
 257    (if (and port
 258             (null (eq port elmo-nntp-default-port)))
 259        (concat ":" (if (numberp port)
 260                        (int-to-string port) port)))
 261    (unless (eq (elmo-network-stream-type-symbol type)
 262                elmo-nntp-default-stream-type)
 263      (elmo-network-stream-type-spec-string type))))
 264
 265 (defun elmo-nntp-get-session (folder &optional if-exists)
 266   (elmo-network-get-session
 267    'elmo-nntp-session
 268    (concat
 269     (if (elmo-folder-biff-internal folder)
 270         "BIFF-")
 271     "NNTP")
 272    folder
 273    if-exists))
 274
 275 (luna-define-method elmo-network-initialize-session ((session
 276                                                       elmo-nntp-session))
 277   (let ((process (elmo-network-session-process-internal session))
 278         response)
 279     (set-process-filter (elmo-network-session-process-internal session)
 280                         'elmo-nntp-process-filter)
 281     (with-current-buffer (elmo-network-session-buffer session)
 282       (setq elmo-nntp-read-point (point-min))
 283       ;; Skip garbage output from process before greeting.
 284       (while (and (memq (process-status process) '(open run))
 285                   (goto-char (point-max))
 286                   (forward-line -1)
 287                   (not (looking-at "^[2-5][0-9][0-9]")))
 288         (accept-process-output process 1))
 289       (setq elmo-nntp-read-point (point))
 290       (setq response (elmo-nntp-read-response session t t))
 291       (unless (car response)
 292           (signal 'elmo-open-error (list (cdr response))))
 293       (if elmo-nntp-send-mode-reader
 294           (elmo-nntp-send-mode-reader session))
 295       (when (eq (elmo-network-stream-type-symbol
 296                  (elmo-network-session-stream-type-internal session))
 297                 'starttls)
 298         (elmo-nntp-send-command session "starttls")
 299         (or (elmo-nntp-read-response session)
 300             (error "Cannot open starttls session"))
 301         (starttls-negotiate process)))))
 302
 303 (luna-define-method elmo-network-authenticate-session ((session
 304                                                         elmo-nntp-session))
 305   (with-current-buffer (elmo-network-session-buffer session)
 306     (when (elmo-network-session-user-internal session)
 307       (elmo-nntp-send-command session
 308                               (format "authinfo user %s"
 309                                       (elmo-network-session-user-internal
 310                                        session))
 311                               nil
 312                               'no-log)
 313       (or (elmo-nntp-read-response session)
 314           (signal 'elmo-authenticate-error '(authinfo)))
 315       (elmo-nntp-send-command
 316        session
 317        (format "authinfo pass %s"
 318                (elmo-get-passwd (elmo-network-session-password-key session)))
 319        nil
 320        'no-log)
 321       (or (elmo-nntp-read-response session)
 322           (signal 'elmo-authenticate-error '(authinfo))))))
 323
 324 (luna-define-method elmo-network-setup-session ((session
 325                                                  elmo-nntp-session))
 326   (run-hooks 'elmo-nntp-opened-hook))
 327
 328 (defun elmo-nntp-process-filter (process output)
 329   (when (buffer-live-p (process-buffer process))
 330     (with-current-buffer (process-buffer process)
 331       (goto-char (point-max))
 332       (insert output)
 333       (elmo-nntp-debug "RECEIVED: %s\n" output))))
 334
 335 (defun elmo-nntp-send-mode-reader (session)
 336   (elmo-nntp-send-command session "mode reader")
 337   (if (null (elmo-nntp-read-response session t))
 338       (message "Mode reader failed")))
 339
 340 (defun elmo-nntp-send-command (session command &optional noerase no-log)
 341   (with-current-buffer (elmo-network-session-buffer session)
 342     (unless noerase
 343       (erase-buffer)
 344       (goto-char (point-min)))
 345     (setq elmo-nntp-read-point (point))
 346     (elmo-nntp-debug "SEND: %s\n" (if no-log "<NO LOGGING>" command))
 347     (process-send-string (elmo-network-session-process-internal
 348                           session) command)
 349     (process-send-string (elmo-network-session-process-internal
 350                           session) "\r\n")))
 351
 352 (defun elmo-nntp-read-response (session &optional not-command error-msg)
 353   (with-current-buffer (elmo-network-session-buffer session)
 354     (let ((process (elmo-network-session-process-internal session))
 355           (case-fold-search nil)
 356           (response-string nil)
 357           (response-continue t)
 358           response match-end)
 359       (while response-continue
 360         (goto-char elmo-nntp-read-point)
 361         (while (not (search-forward "\r\n" nil t))
 362           (accept-process-output process)
 363           (goto-char elmo-nntp-read-point))
 364         (setq match-end (point))
 365         (setq response-string
 366               (buffer-substring elmo-nntp-read-point (- match-end 2)))
 367         (goto-char elmo-nntp-read-point)
 368         (if (looking-at "[23][0-9]+ .*$")
 369             (progn (setq response-continue nil)
 370                    (setq elmo-nntp-read-point match-end)
 371                    (setq response
 372                          (if response
 373                              (concat response "\n" response-string)
 374                            response-string)))
 375           (if (looking-at "[^23][0-9]+ .*$")
 376               (progn (setq response-continue nil)
 377                      (setq elmo-nntp-read-point match-end)
 378                      (setq response nil))
 379             (setq elmo-nntp-read-point match-end)
 380             (if not-command
 381                 (setq response-continue nil))
 382             (setq response
 383                   (if response
 384                       (concat response "\n" response-string)
 385                     response-string)))
 386           (setq elmo-nntp-read-point match-end)))
 387       (if error-msg
 388           (cons response response-string)
 389         response))))
 390
 391 (defun elmo-nntp-read-raw-response (session)
 392   (with-current-buffer (elmo-network-session-buffer session)
 393     (goto-char elmo-nntp-read-point)
 394     (while (not (search-forward "\r\n" nil t))
 395       (accept-process-output (elmo-network-session-process-internal
 396                               session))
 397       (goto-char elmo-nntp-read-point))
 398     (buffer-substring elmo-nntp-read-point (- (point) 2))))
 399
 400 (defun elmo-nntp-read-contents (session)
 401   (with-current-buffer (elmo-network-session-buffer session)
 402     (goto-char elmo-nntp-read-point)
 403     (while (not (re-search-forward "^\\.\r\n" nil t))
 404       (accept-process-output (elmo-network-session-process-internal
 405                               session))
 406       (goto-char elmo-nntp-read-point))
 407     (elmo-delete-cr
 408      (buffer-substring elmo-nntp-read-point
 409                        (- (point) 3)))))
 410
 411 (defun elmo-nntp-read-body (session outbuf)
 412   (with-current-buffer (elmo-network-session-buffer session)
 413     (goto-char elmo-nntp-read-point)
 414     (while (not (re-search-forward "^\\.\r\n" nil t))
 415       (accept-process-output (elmo-network-session-process-internal session))
 416       (goto-char elmo-nntp-read-point))
 417     (let ((start elmo-nntp-read-point)
 418           (end  (point)))
 419       (with-current-buffer outbuf
 420         (erase-buffer)
 421         (insert-buffer-substring (elmo-network-session-buffer session)
 422                                  start (- end 3))
 423         (elmo-delete-cr-buffer)))
 424     t))
 425
 426 (defun elmo-nntp-select-group (session group &optional force)
 427   (let (response)
 428     (when (or force
 429               (not (string= (elmo-nntp-session-current-group-internal session)
 430                             group)))
 431       (unwind-protect
 432           (progn
 433             (elmo-nntp-send-command session (format "group %s" group))
 434             (setq response (elmo-nntp-read-response session)))
 435         (elmo-nntp-session-set-current-group-internal session
 436                                                       (and response group))
 437         response))))
 438
 439 (defun elmo-nntp-list-folders-get-cache (group server buf)
 440   (when (and elmo-nntp-list-folders-use-cache
 441              elmo-nntp-list-folders-cache
 442              (string-match (concat "^"
 443                                    (regexp-quote
 444                                     (or
 445                                      (nth 1 elmo-nntp-list-folders-cache)
 446                                      "")))
 447                            (or group ""))
 448              (string-match (concat "^"
 449                                    (regexp-quote
 450                                     (or
 451                                      (nth 2 elmo-nntp-list-folders-cache)
 452                                      "")))
 453                            (or server "")))
 454     (let* ((cache-time (car elmo-nntp-list-folders-cache)))
 455       (unless (elmo-time-expire cache-time
 456                                 elmo-nntp-list-folders-use-cache)
 457         (save-excursion
 458           (set-buffer buf)
 459           (erase-buffer)
 460           (insert (nth 3 elmo-nntp-list-folders-cache))
 461           (goto-char (point-min))
 462           (or (string= group "")
 463               (and group
 464                    (keep-lines (concat "^" (regexp-quote group) "\\."))))
 465           t
 466           )))))
 467
 468 (defsubst elmo-nntp-catchup-msgdb (msgdb max-number)
 469   (let ((numbers (elmo-msgdb-list-messages msgdb))
 470         msgdb-max)
 471     (setq msgdb-max (if numbers (apply #'max numbers) 0))
 472     (when (and msgdb-max
 473                max-number
 474                (< msgdb-max max-number))
 475       (let ((i (1+ msgdb-max))
 476             killed)
 477         (while (<= i max-number)
 478           (setq killed (cons i killed))
 479           (incf i))
 480         (nreverse killed)))))
 481
 482 (luna-define-method elmo-folder-list-subfolders ((folder elmo-nntp-folder)
 483                                                  &optional one-level)
 484   (elmo-nntp-folder-list-subfolders folder one-level))
 485
 486 (defun elmo-nntp-folder-list-subfolders (folder one-level)
 487   (let ((session (elmo-nntp-get-session folder))
 488         (case-fold-search nil)
 489         response ret-val top-ng username append-serv use-list-active start)
 490     (with-temp-buffer
 491       (set-buffer-multibyte nil)
 492       (if (and (elmo-nntp-folder-group-internal folder)
 493                (elmo-nntp-select-group
 494                 session
 495                 (elmo-nntp-folder-group-internal folder)))
 496           ;; add top newsgroups
 497           (setq ret-val (list (elmo-nntp-folder-group-internal folder))))
 498       (unless (setq response (elmo-nntp-list-folders-get-cache
 499                               (elmo-nntp-folder-group-internal folder)
 500                               (elmo-net-folder-server-internal folder)
 501                               (current-buffer)))
 502         (when (setq use-list-active (elmo-nntp-list-active-p session))
 503           (elmo-nntp-send-command
 504            session
 505            (concat "list"
 506                    (if (and (elmo-nntp-folder-group-internal folder)
 507                             (not (string= (elmo-nntp-folder-group-internal
 508                                            folder) "")))
 509                        (concat " active"
 510                                (format
 511                                 " %s.*"
 512                                 (elmo-nntp-folder-group-internal folder))))))
 513           (if (elmo-nntp-read-response session t)
 514               (if (null (setq response (elmo-nntp-read-contents session)))
 515                   (error "NNTP List folders failed")
 516                 (when elmo-nntp-list-folders-use-cache
 517                   (setq elmo-nntp-list-folders-cache
 518                         (list (current-time)
 519                               (elmo-nntp-folder-group-internal folder)
 520                               (elmo-net-folder-server-internal folder)
 521                               response)))
 522                 (erase-buffer)
 523                 (insert response))
 524             (elmo-nntp-set-list-active session nil)
 525             (setq use-list-active nil)))
 526         (when (null use-list-active)
 527           (elmo-nntp-send-command session "list")
 528           (if (null (and (elmo-nntp-read-response session t)
 529                          (setq response (elmo-nntp-read-contents session))))
 530               (error "NNTP List folders failed"))
 531           (when elmo-nntp-list-folders-use-cache
 532             (setq elmo-nntp-list-folders-cache
 533                   (list (current-time) nil nil response)))
 534           (erase-buffer)
 535           (setq start nil)
 536           (while (string-match (concat "^"
 537                                        (regexp-quote
 538                                         (or
 539                                          (elmo-nntp-folder-group-internal
 540                                           folder)
 541                                          "")) ".*$")
 542                                response start)
 543             (insert (match-string 0 response) "\n")
 544             (setq start (match-end 0)))))
 545       (goto-char (point-min))
 546       (let ((len (count-lines (point-min) (point-max)))
 547             (i 0) regexp)
 548         (if one-level
 549             (progn
 550               (setq regexp
 551                     (format "^\\(%s[^. ]+\\)\\([. ]\\).*\n"
 552                             (if (and (elmo-nntp-folder-group-internal folder)
 553                                      (null (string=
 554                                             (elmo-nntp-folder-group-internal
 555                                              folder) "")))
 556                                 (concat (elmo-nntp-folder-group-internal
 557                                          folder)
 558                                         "\\.")
 559                               "")))
 560               (while (looking-at regexp)
 561                 (setq top-ng (elmo-match-buffer 1))
 562                 (if (string= (elmo-match-buffer 2) " ")
 563                     (if (not (or (member top-ng ret-val)
 564                                  (assoc top-ng ret-val)))
 565                         (setq ret-val (nconc ret-val (list top-ng))))
 566                   (if (member top-ng ret-val)
 567                       (setq ret-val (delete top-ng ret-val)))
 568                   (if (not (assoc top-ng ret-val))
 569                       (setq ret-val (nconc ret-val (list (list top-ng))))))
 570                 (when (> len elmo-display-progress-threshold)
 571                   (setq i (1+ i))
 572                   (if (or (zerop (% i 10)) (= i len))
 573                       (elmo-display-progress
 574                        'elmo-nntp-list-folders "Parsing active..."
 575                        (/ (* i 100) len))))
 576                 (forward-line 1)))
 577           (while (re-search-forward "\\([^ ]+\\) .*\n" nil t)
 578             (setq ret-val (nconc ret-val
 579                                  (list (elmo-match-buffer 1))))
 580             (when (> len elmo-display-progress-threshold)
 581               (setq i (1+ i))
 582               (if (or (zerop (% i 10)) (= i len))
 583                   (elmo-display-progress
 584                    'elmo-nntp-list-folders "Parsing active..."
 585                    (/ (* i 100) len))))))
 586         (when (> len elmo-display-progress-threshold)
 587           (elmo-display-progress
 588            'elmo-nntp-list-folders "Parsing active..." 100))))
 589
 590     (setq username (or (elmo-net-folder-user-internal folder) ""))
 591     (unless (string= username (or elmo-nntp-default-user ""))
 592       (setq append-serv (concat append-serv
 593                                 ":" (elmo-quote-syntactical-element
 594                                      username
 595                                      'user elmo-nntp-folder-name-syntax))))
 596     (unless (string= (elmo-net-folder-server-internal folder)
 597                      elmo-nntp-default-server)
 598       (setq append-serv (concat append-serv
 599                                 "@" (elmo-net-folder-server-internal folder))))
 600     (unless (eq (elmo-net-folder-port-internal folder) elmo-nntp-default-port)
 601       (setq append-serv (concat append-serv
 602                                 ":" (int-to-string
 603                                      (elmo-net-folder-port-internal folder)))))
 604     (unless (eq (elmo-network-stream-type-symbol
 605                  (elmo-net-folder-stream-type-internal folder))
 606                 elmo-nntp-default-stream-type)
 607       (setq append-serv
 608             (concat append-serv
 609                     (elmo-network-stream-type-spec-string
 610                      (elmo-net-folder-stream-type-internal folder)))))
 611     (mapcar (lambda (fld)
 612               (if (consp fld)
 613                   (list (concat "-" (elmo-nntp-decode-group-string (car fld))
 614                                 append-serv))
 615                 (concat "-" (elmo-nntp-decode-group-string fld) append-serv)))
 616             ret-val)))
 617
 618 (defun elmo-nntp-make-msglist (beg-str end-str)
 619   (elmo-make-number-list (string-to-int beg-str) (string-to-int end-str)))
 620
 621 (luna-define-method elmo-folder-list-messages-plugged ((folder
 622                                                         elmo-nntp-folder)
 623                                                        &optional nohide)
 624   (let ((session (elmo-nntp-get-session folder))
 625         (group   (elmo-nntp-folder-group-internal folder))
 626         response numbers use-listgroup)
 627     (save-excursion
 628       (when (setq use-listgroup (elmo-nntp-listgroup-p session))
 629         (elmo-nntp-send-command session
 630                                 (format "listgroup %s" group))
 631         (if (not (elmo-nntp-read-response session t))
 632             (progn
 633               (elmo-nntp-set-listgroup session nil)
 634               (setq use-listgroup nil))
 635           (if (null (setq response (elmo-nntp-read-contents session)))
 636               (error "Fetching listgroup failed"))
 637           (setq numbers (elmo-string-to-list response))
 638           (elmo-nntp-session-set-current-group-internal session
 639                                                         group)))
 640       (unless use-listgroup
 641         (elmo-nntp-send-command session (format "group %s" group))
 642         (if (null (setq response (elmo-nntp-read-response session)))
 643             (error "Select group failed"))
 644         (when (and
 645                (string-match
 646                 "211 \\([0-9]+\\) \\([0-9]+\\) \\([0-9]+\\) [^.].+$"
 647                 response)
 648                (> (string-to-int (elmo-match-string 1 response)) 0))
 649           (setq numbers (elmo-nntp-make-msglist
 650                          (elmo-match-string 2 response)
 651                          (elmo-match-string 3 response)))))
 652       numbers)))
 653
 654 (luna-define-method elmo-folder-status ((folder elmo-nntp-folder))
 655   (elmo-nntp-folder-status folder))
 656
 657 (defun elmo-nntp-folder-status (folder)
 658   (let ((killed-list (elmo-msgdb-killed-list-load
 659                       (elmo-folder-msgdb-path folder)))
 660         end-num entry)
 661     (if elmo-nntp-groups-async
 662         (if (setq entry
 663                   (elmo-get-hash-val
 664                    (concat (elmo-nntp-folder-group-internal folder)
 665                            (elmo-nntp-folder-postfix
 666                             (elmo-net-folder-user-internal folder)
 667                             (elmo-net-folder-server-internal folder)
 668                             (elmo-net-folder-port-internal folder)
 669                             (elmo-net-folder-stream-type-internal folder)))
 670                    elmo-newsgroups-hashtb))
 671             (progn
 672               (setq end-num (nth 2 entry))
 673               (when (and killed-list
 674                          (elmo-number-set-member end-num killed-list))
 675                 ;; Max is killed.
 676                 (setq end-num nil))
 677               (cons end-num (car entry)))
 678           (error "No such newsgroup \"%s\""
 679                  (elmo-nntp-folder-group-internal folder)))
 680       (let ((session (elmo-nntp-get-session folder))
 681             response e-num)
 682         (if (null session)
 683             (error "Connection failed"))
 684         (save-excursion
 685           (elmo-nntp-send-command session
 686                                   (format
 687                                    "group %s"
 688                                    (elmo-nntp-folder-group-internal folder)))
 689           (setq response (elmo-nntp-read-response session))
 690           (if (and response
 691                    (string-match
 692                     "211 \\([0-9]+\\) \\([0-9]+\\) \\([0-9]+\\) [^.].+$"
 693                     response))
 694               (progn
 695                 (setq end-num (string-to-int
 696                                (elmo-match-string 3 response)))
 697                 (setq e-num (string-to-int
 698                              (elmo-match-string 1 response)))
 699                 (when (and killed-list
 700                            (elmo-number-set-member end-num killed-list))
 701                   ;; Max is killed.
 702                   (setq end-num nil))
 703                 (cons end-num e-num))
 704             (if (null response)
 705                 (error "Selecting newsgroup \"%s\" failed"
 706                        (elmo-nntp-folder-group-internal folder))
 707               nil)))))))
 708
 709 (defconst elmo-nntp-overview-index
 710   '(("number" . 0)
 711     ("subject" . 1)
 712     ("from" . 2)
 713     ("date" . 3)
 714     ("message-id" . 4)
 715     ("references" . 5)
 716     ("size" . 6)
 717     ("lines" . 7)
 718     ("xref" . 8)))
 719
 720 (defun elmo-nntp-create-msgdb-from-overview-string (folder
 721                                                     str
 722                                                     flag-table
 723                                                     &optional numlist)
 724   (let ((new-msgdb (elmo-make-msgdb))
 725         ov-list message-id entity
 726         ov-entity num
 727         field field-index flags)
 728     (setq ov-list (elmo-nntp-parse-overview-string str))
 729     (while ov-list
 730       (setq ov-entity (car ov-list))
 731 ;;; INN bug??
 732 ;;;   (if (or (> (setq num (string-to-int (aref ov-entity 0)))
 733 ;;;              99999)
 734 ;;;           (<= num 0))
 735 ;;;       (setq num 0))
 736 ;;;  (setq num (int-to-string num))
 737       (setq num (string-to-int (aref ov-entity 0)))
 738       (when (or (null numlist)
 739                 (memq num numlist))
 740         (setq entity (elmo-msgdb-make-message-entity
 741                       (elmo-msgdb-message-entity-handler new-msgdb)
 742                       :message-id (aref ov-entity 4)
 743                       :number     num
 744                       :references (elmo-msgdb-get-last-message-id
 745                                     (aref ov-entity 5))
 746                       :from       (elmo-with-enable-multibyte
 747                                     (eword-decode-string
 748                                      (elmo-delete-char  ?\"
 749                                                         (or (aref ov-entity 2)
 750                                                             elmo-no-from))))
 751                       :subject    (or (elmo-with-enable-multibyte
 752                                         (eword-decode-string
 753                                          (aref ov-entity 1)))
 754                                       elmo-no-subject)
 755                       :date       (aref ov-entity 3)
 756                       :size       (string-to-int (aref ov-entity 6))))
 757         (dolist (extra elmo-msgdb-extra-fields)
 758           (setq extra (downcase extra))
 759           (when (and (setq field-index
 760                            (cdr (assoc extra elmo-nntp-overview-index)))
 761                      (> (length ov-entity) field-index))
 762             (setq field (aref ov-entity field-index))
 763             (when (eq field-index 8) ;; xref
 764               (setq field (elmo-msgdb-remove-field-string field)))
 765             (elmo-message-entity-set-field entity (intern extra) field)))
 766         (setq message-id (elmo-message-entity-field entity 'message-id)
 767               flags (elmo-flag-table-get flag-table message-id))
 768         (elmo-global-flags-set flags folder num message-id)
 769         (elmo-msgdb-append-entity new-msgdb entity flags))
 770       (setq ov-list (cdr ov-list)))
 771     new-msgdb))
 772
 773 (luna-define-method elmo-folder-msgdb-create ((folder elmo-nntp-folder)
 774                                               numbers flag-table)
 775   (elmo-nntp-folder-msgdb-create folder numbers flag-table))
 776
 777 (defun elmo-nntp-folder-msgdb-create (folder numbers flag-table)
 778   (let ((filter numbers)
 779         (session (elmo-nntp-get-session folder))
 780         (new-msgdb (elmo-make-msgdb))
 781         beg-num end-num cur length
 782         new-msgdb ov-str use-xover dir)
 783     (elmo-nntp-select-group session (elmo-nntp-folder-group-internal
 784                                      folder))
 785     (when (setq use-xover (elmo-nntp-xover-p session))
 786       (setq beg-num (car numbers)
 787             cur beg-num
 788             end-num (nth (1- (length numbers)) numbers)
 789             length  (+ (- end-num beg-num) 1))
 790       (message "Getting overview...")
 791       (while (<= cur end-num)
 792         (elmo-nntp-send-command
 793          session
 794          (format
 795           "xover %s-%s"
 796           (int-to-string cur)
 797           (int-to-string
 798            (+ cur
 799               elmo-nntp-overview-fetch-chop-length))))
 800         (with-current-buffer (elmo-network-session-buffer session)
 801           (if ov-str
 802               (elmo-msgdb-append
 803                new-msgdb
 804                (elmo-nntp-create-msgdb-from-overview-string
 805                 folder
 806                 ov-str
 807                 flag-table
 808                 filter))))
 809         (if (null (elmo-nntp-read-response session t))
 810             (progn
 811               (setq cur end-num);; exit while loop
 812               (elmo-nntp-set-xover session nil)
 813               (setq use-xover nil))
 814           (if (null (setq ov-str (elmo-nntp-read-contents session)))
 815               (error "Fetching overview failed")))
 816         (setq cur (+ elmo-nntp-overview-fetch-chop-length cur 1))
 817         (when (> length elmo-display-progress-threshold)
 818           (elmo-display-progress
 819            'elmo-nntp-msgdb-create "Getting overview..."
 820            (/ (* (+ (- (min cur end-num)
 821                        beg-num) 1) 100) length))))
 822       (when (> length elmo-display-progress-threshold)
 823         (elmo-display-progress
 824          'elmo-nntp-msgdb-create "Getting overview..." 100)))
 825     (if (not use-xover)
 826         (setq new-msgdb (elmo-nntp-msgdb-create-by-header
 827                          session numbers flag-table))
 828       (with-current-buffer (elmo-network-session-buffer session)
 829         (if ov-str
 830             (elmo-msgdb-append
 831              new-msgdb
 832              (elmo-nntp-create-msgdb-from-overview-string
 833               folder
 834               ov-str
 835               flag-table
 836               filter)))))
 837     (elmo-folder-set-killed-list-internal
 838      folder
 839      (nconc
 840       (elmo-folder-killed-list-internal folder)
 841       (car (elmo-list-diff
 842             numbers
 843             (elmo-msgdb-list-messages new-msgdb)))))
 844     ;; If there are canceled messages, overviews are not obtained
 845     ;; to max-number(inn 2.3?).
 846     (when (and (elmo-nntp-max-number-precedes-list-active-p)
 847                (elmo-nntp-list-active-p session))
 848       (elmo-nntp-send-command session
 849                               (format "list active %s"
 850                                       (elmo-nntp-folder-group-internal
 851                                        folder)))
 852       (if (null (elmo-nntp-read-response session))
 853           (progn
 854             (elmo-nntp-set-list-active session nil)
 855             (error "NNTP list command failed")))
 856       (let ((killed (elmo-nntp-catchup-msgdb
 857                      new-msgdb
 858                      (nth 1 (read (concat "(" (elmo-nntp-read-contents
 859                                                session) ")"))))))
 860         (when killed
 861           (elmo-folder-kill-messages folder killed))))
 862     new-msgdb))
 863
 864 (luna-define-method elmo-folder-update-number ((folder elmo-nntp-folder))
 865   (when (elmo-nntp-max-number-precedes-list-active-p)
 866     (let ((session (elmo-nntp-get-session folder)))
 867       (when (elmo-nntp-list-active-p session)
 868         (let ((numbers (elmo-folder-list-messages folder nil 'in-msgdb))
 869               msgdb-max max-number)
 870           ;; If there are canceled messages, overviews are not obtained
 871           ;; to max-number(inn 2.3?).
 872           (elmo-nntp-select-group session
 873                                   (elmo-nntp-folder-group-internal folder))
 874           (elmo-nntp-send-command session
 875                                   (format "list active %s"
 876                                           (elmo-nntp-folder-group-internal
 877                                            folder)))
 878           (if (null (elmo-nntp-read-response session))
 879               (error "NNTP list command failed"))
 880           (setq max-number
 881                 (nth 1 (read (concat "(" (elmo-nntp-read-contents
 882                                           session) ")"))))
 883           (setq msgdb-max (if numbers (apply #'max numbers) 0))
 884           (when (and msgdb-max
 885                      max-number
 886                      (< msgdb-max max-number))
 887             (let ((i (1+ msgdb-max))
 888                   killed)
 889               (while (<= i max-number)
 890                 (setq killed (cons i killed))
 891                 (incf i))
 892               (elmo-folder-kill-messages folder (nreverse killed)))))))))
 893
 894 (defun elmo-nntp-msgdb-create-by-header (session numbers flag-table)
 895   (with-temp-buffer
 896     (elmo-nntp-retrieve-headers session (current-buffer) numbers)
 897     (elmo-nntp-msgdb-create-message
 898      (length numbers) flag-table)))
 899
 900 (defun elmo-nntp-parse-xhdr-response (string)
 901   (let (response)
 902     (with-temp-buffer
 903       (insert string)
 904       (goto-char (point-min))
 905       (while (not (eobp))
 906         (if (looking-at "^\\([0-9]+\\) \\(.*\\)$")
 907             (setq response (cons (cons (string-to-int (elmo-match-buffer 1))
 908                                        (elmo-match-buffer 2))
 909                                  response)))
 910         (forward-line 1)))
 911     (nreverse response)))
 912
 913 (defun elmo-nntp-parse-overview-string (string)
 914   (save-excursion
 915     (let ((tmp-buffer (get-buffer-create " *ELMO Overview TMP*"))
 916           ret-list ret-val beg)
 917       (set-buffer tmp-buffer)
 918       (erase-buffer)
 919       (set-buffer-multibyte nil)
 920       (insert string)
 921       (goto-char (point-min))
 922       (setq beg (point))
 923       (while (not (eobp))
 924         (end-of-line)
 925         (setq ret-list (save-match-data
 926                          (apply 'vector (split-string
 927                                          (buffer-substring beg (point))
 928                                          "\t"))))
 929         (beginning-of-line)
 930         (forward-line 1)
 931         (setq beg (point))
 932         (setq ret-val (nconc ret-val (list ret-list))))
 933 ;;;   (kill-buffer tmp-buffer)
 934       ret-val)))
 935
 936 (defun elmo-nntp-get-newsgroup-by-msgid (msgid server user port type)
 937   "Get nntp header string."
 938   (save-excursion
 939     (let ((session (elmo-nntp-get-session
 940                     (luna-make-entity
 941                      'elmo-nntp-folder
 942                      :user user
 943                      :server server
 944                      :port port
 945                      :stream-type type))))
 946       (elmo-nntp-send-command session
 947                               (format "head %s" msgid))
 948       (if (elmo-nntp-read-response session)
 949           (elmo-nntp-read-contents session))
 950       (with-current-buffer (elmo-network-session-buffer session)
 951         (std11-field-body "Newsgroups")))))
 952
 953 (luna-define-method elmo-message-fetch :around
 954   ((folder elmo-nntp-folder) number strategy &optional unread section)
 955   (when (luna-call-next-method)
 956     (elmo-nntp-setup-crosspost-buffer folder number)
 957     (unless unread
 958       (elmo-nntp-folder-update-crosspost-message-alist
 959        folder (list number)))
 960     t))
 961
 962 (luna-define-method elmo-message-fetch-plugged ((folder elmo-nntp-folder)
 963                                                 number strategy
 964                                                 &optional section outbuf
 965                                                 unread)
 966   (elmo-nntp-message-fetch folder number strategy section outbuf unread))
 967
 968 (defun elmo-nntp-message-fetch (folder number strategy section outbuf unread)
 969   (let ((session (elmo-nntp-get-session folder))
 970         newsgroups)
 971     (with-current-buffer (elmo-network-session-buffer session)
 972       (elmo-nntp-select-group session (elmo-nntp-folder-group-internal folder))
 973       (elmo-nntp-send-command session (format "article %s" number))
 974       (if (null (elmo-nntp-read-response session t))
 975           (progn
 976             (with-current-buffer outbuf (erase-buffer))
 977             (message "Fetching message failed")
 978             nil)
 979         (prog1 (elmo-nntp-read-body session outbuf)
 980           (with-current-buffer outbuf
 981             (goto-char (point-min))
 982             (while (re-search-forward "^\\." nil t)
 983               (replace-match "")
 984               (forward-line))
 985             (elmo-nntp-setup-crosspost-buffer folder number)
 986             (unless unread
 987               (elmo-nntp-folder-update-crosspost-message-alist
 988                folder (list number)))))))))
 989
 990 (defun elmo-nntp-post (hostname content-buf)
 991   (let ((session (elmo-nntp-get-session
 992                   (luna-make-entity
 993                    'elmo-nntp-folder
 994                    :user elmo-nntp-default-user
 995                    :server hostname
 996                    :port elmo-nntp-default-port
 997                    :stream-type
 998                    (elmo-get-network-stream-type
 999                     elmo-nntp-default-stream-type))))
1000         response has-message-id)
1001     (save-excursion
1002       (set-buffer content-buf)
1003       (goto-char (point-min))
1004       (if (search-forward mail-header-separator nil t)
1005           (delete-region (match-beginning 0)(match-end 0)))
1006       (setq has-message-id (std11-field-body "message-id"))
1007       (elmo-nntp-send-command session "post")
1008       (if (string-match "^340" (setq response
1009                                      (elmo-nntp-read-raw-response session)))
1010           (if (string-match "recommended ID \\(<[^@]+@[^>]+>\\)" response)
1011               (unless has-message-id
1012                 (goto-char (point-min))
1013                 (insert (concat "Message-ID: "
1014                                 (elmo-match-string 1 response)
1015                                 "\n"))))
1016         (error "POST failed"))
1017       (run-hooks 'elmo-nntp-post-pre-hook)
1018       (elmo-nntp-send-buffer session content-buf)
1019       (elmo-nntp-send-command session ".")
1020 ;;;   (elmo-nntp-read-response buffer process t)
1021       (if (not (string-match
1022                 "^2" (setq response (elmo-nntp-read-raw-response
1023                                      session))))
1024           (error "NNTP error: %s" response)))))
1025
1026 (defsubst elmo-nntp-send-data-line (session line)
1027   "Send LINE to SESSION."
1028   ;; Escape "." at start of a line
1029   (if (eq (string-to-char line) ?.)
1030       (process-send-string (elmo-network-session-process-internal
1031                             session) "."))
1032   (process-send-string (elmo-network-session-process-internal
1033                         session) line)
1034   (process-send-string (elmo-network-session-process-internal
1035                         session) "\r\n"))
1036
1037 (defun elmo-nntp-send-buffer (session databuf)
1038   "Send data content of DATABUF to SESSION."
1039   (let ((data-continue t)
1040         line bol)
1041     (with-current-buffer databuf
1042       (goto-char (point-min))
1043       (while data-continue
1044         (beginning-of-line)
1045         (setq bol (point))
1046         (end-of-line)
1047         (setq line (buffer-substring bol (point)))
1048         (unless (eq (forward-line 1) 0) (setq data-continue nil))
1049         (elmo-nntp-send-data-line session line)))))
1050
1051 (luna-define-method elmo-folder-delete-messages ((folder elmo-nntp-folder)
1052                                                  numbers)
1053   (elmo-folder-kill-messages folder numbers)
1054   t)
1055
1056 (luna-define-method elmo-folder-exists-p-plugged ((folder elmo-nntp-folder))
1057   (let ((session (elmo-nntp-get-session folder)))
1058     (elmo-nntp-send-command
1059      session
1060      (format "group %s"
1061              (elmo-nntp-folder-group-internal folder)))
1062     (elmo-nntp-read-response session)))
1063
1064 (defun elmo-nntp-retrieve-field (spec field from-msgs)
1065   "Retrieve FIELD values from FROM-MSGS.
1066 Returns a list of cons cells like (NUMBER . VALUE)"
1067   (let ((session (elmo-nntp-get-session spec)))
1068     (if (elmo-nntp-xhdr-p session)
1069         (progn
1070           (elmo-nntp-select-group session (elmo-nntp-folder-group-internal spec))
1071           (elmo-nntp-send-command session
1072                                   (format "xhdr %s %s"
1073                                           field
1074                                           (if from-msgs
1075                                               (format
1076                                                "%d-%d"
1077                                                (car from-msgs)
1078                                                (nth
1079                                                 (max
1080                                                  (- (length from-msgs) 1) 0)
1081                                                 from-msgs))
1082                                             "0-")))
1083           (if (elmo-nntp-read-response session t)
1084               (elmo-nntp-parse-xhdr-response
1085                (elmo-nntp-read-contents session))
1086             (elmo-nntp-set-xhdr session nil)
1087             (error "NNTP XHDR command failed"))))))
1088
1089 (defun elmo-nntp-search-primitive (spec condition &optional from-msgs)
1090   (let ((search-key (elmo-filter-key condition)))
1091     (cond
1092      ((string= "last" search-key)
1093       (let ((numbers (or from-msgs (elmo-folder-list-messages spec))))
1094         (nthcdr (max (- (length numbers)
1095                         (string-to-int (elmo-filter-value condition)))
1096                      0)
1097                 numbers)))
1098      ((string= "first" search-key)
1099       (let* ((numbers (or from-msgs (elmo-folder-list-messages spec)))
1100              (rest (nthcdr (string-to-int (elmo-filter-value condition) )
1101                            numbers)))
1102         (mapcar '(lambda (x) (delete x numbers)) rest)
1103         numbers))
1104      ((or (string= "since" search-key)
1105           (string= "before" search-key))
1106       (let* ((specified-date (elmo-date-make-sortable-string
1107                               (elmo-date-get-datevec (elmo-filter-value
1108                                                       condition))))
1109              (since (string= "since" search-key))
1110              field-date  result)
1111         (if (eq (elmo-filter-type condition) 'unmatch)
1112             (setq since (not since)))
1113         (setq result
1114               (delq nil
1115                     (mapcar
1116                      (lambda (pair)
1117                        (setq field-date
1118                              (elmo-date-make-sortable-string
1119                               (timezone-fix-time
1120                                (cdr pair)
1121                                (current-time-zone) nil)))
1122                        (if (if since
1123                                (or (string= specified-date field-date)
1124                                    (string< specified-date field-date))
1125                              (string< field-date
1126                                       specified-date))
1127                            (car pair)))
1128                      (elmo-nntp-retrieve-field spec "date" from-msgs))))
1129         (if from-msgs
1130             (elmo-list-filter from-msgs result)
1131           result)))
1132      ((string= "body" search-key)
1133       nil)
1134      (t
1135       (let ((val (elmo-filter-value condition))
1136             (negative (eq (elmo-filter-type condition) 'unmatch))
1137             (case-fold-search t)
1138             result)
1139         (setq result
1140               (delq nil
1141                     (mapcar
1142                      (lambda (pair)
1143                        (if (string-match val
1144                                          (eword-decode-string
1145                                           (decode-mime-charset-string
1146                                            (cdr pair) elmo-mime-charset)))
1147                            (unless negative (car pair))
1148                          (if negative (car pair))))
1149                      (elmo-nntp-retrieve-field spec search-key
1150                                                from-msgs))))
1151         (if from-msgs
1152             (elmo-list-filter from-msgs result)
1153           result))))))
1154
1155 (defun elmo-nntp-search-internal (folder condition from-msgs)
1156   (let (result)
1157     (cond
1158      ((vectorp condition)
1159       (setq result (elmo-nntp-search-primitive
1160                     folder condition from-msgs)))
1161      ((eq (car condition) 'and)
1162       (setq result (elmo-nntp-search-internal folder
1163                                               (nth 1 condition)
1164                                               from-msgs)
1165             result (elmo-list-filter result
1166                                      (elmo-nntp-search-internal
1167                                       folder (nth 2 condition)
1168                                       from-msgs))))
1169      ((eq (car condition) 'or)
1170       (setq result (elmo-nntp-search-internal folder
1171                                               (nth 1 condition)
1172                                               from-msgs)
1173             result (elmo-uniq-list
1174                     (nconc result
1175                            (elmo-nntp-search-internal folder
1176                                                       (nth 2 condition)
1177                                                       from-msgs)))
1178             result (sort result '<))))))
1179
1180 (defun elmo-nntp-use-server-search-p (condition)
1181   (if (vectorp condition)
1182       (not (string= "body" (elmo-filter-key condition)))
1183     (and (elmo-nntp-use-server-search-p (nth 1 condition))
1184          (elmo-nntp-use-server-search-p (nth 2 condition)))))
1185
1186 (luna-define-method elmo-folder-search :around ((folder elmo-nntp-folder)
1187                                                 condition &optional from-msgs)
1188   (if (and (elmo-folder-plugged-p folder)
1189            (elmo-nntp-use-server-search-p condition))
1190       (elmo-nntp-search-internal folder condition from-msgs)
1191     (luna-call-next-method)))
1192
1193 (defun elmo-nntp-get-folders-info-prepare (folder session-keys)
1194   (condition-case ()
1195       (let ((session (elmo-nntp-get-session folder))
1196             key count)
1197         (with-current-buffer (elmo-network-session-buffer session)
1198           (unless (setq key (assoc session session-keys))
1199             (erase-buffer)
1200             (setq key (cons session
1201                             (vector 0
1202                                     (elmo-net-folder-server-internal folder)
1203                                     (elmo-net-folder-user-internal folder)
1204                                     (elmo-net-folder-port-internal folder)
1205                                     (elmo-net-folder-stream-type-internal
1206                                      folder))))
1207             (setq session-keys (nconc session-keys (list key))))
1208           (elmo-nntp-send-command session
1209                                   (format "group %s"
1210                                           (elmo-nntp-folder-group-internal
1211                                            folder))
1212                                   'noerase)
1213           (if elmo-nntp-get-folders-securely
1214               (accept-process-output
1215                (elmo-network-session-process-internal session)
1216                1))
1217           (setq count (aref (cdr key) 0))
1218           (aset (cdr key) 0 (1+ count))))
1219     (error
1220      (when elmo-auto-change-plugged
1221        (sit-for 1))
1222      nil))
1223   session-keys)
1224
1225 (defun elmo-nntp-get-folders-info (session-keys)
1226   (let ((sessions session-keys)
1227         (cur (get-buffer-create " *ELMO NNTP Temp*")))
1228     (while sessions
1229       (let* ((session (caar sessions))
1230              (key     (cdar sessions))
1231              (count   (aref key 0))
1232              (server  (aref key 1))
1233              (user    (aref key 2))
1234              (port    (aref key 3))
1235              (type    (aref key 4))
1236              (hashtb (or elmo-newsgroups-hashtb
1237                          (setq elmo-newsgroups-hashtb
1238                                (elmo-make-hash count)))))
1239         (save-excursion
1240           (elmo-nntp-groups-read-response session cur count)
1241           (set-buffer cur)
1242           (goto-char (point-min))
1243           (let ((case-replace nil)
1244                 (postfix (elmo-nntp-folder-postfix user server port type)))
1245             (if (not (string= postfix ""))
1246                 (save-excursion
1247                   (while (re-search-forward "^\\(211 [0-9]+ [0-9]+ [0-9]+ [^ \n]+\\)\\(.*\\)$" nil t)
1248                     (replace-match (concat (match-string 1)
1249                                            (elmo-replace-in-string
1250                                             postfix
1251                                             "\\\\" "\\\\\\\\\\\\\\\\")))))))
1252           (let (len min max group)
1253             (while (not (eobp))
1254               (condition-case ()
1255                   (when (= (following-char) ?2)
1256                     (read cur)
1257                     (setq len (read cur)
1258                           min (read cur)
1259                           max (read cur))
1260                     (set (setq group (let ((obarray hashtb)) (read cur)))
1261                          (list len min max)))
1262                 (error (and group (symbolp group) (set group nil))))
1263               (forward-line 1))))
1264         (setq sessions (cdr sessions))))
1265     (kill-buffer cur)))
1266
1267 ;; original is 'nntp-retrieve-groups [Gnus]
1268 (defun elmo-nntp-groups-read-response (session outbuf count)
1269   (let* ((received 0)
1270          (last-point (point-min)))
1271     (with-current-buffer (elmo-network-session-buffer session)
1272       (accept-process-output
1273        (elmo-network-session-process-internal session) 1)
1274       (discard-input)
1275       ;; Wait for all replies.
1276       (message "Getting folders info...")
1277       (while (progn
1278                (goto-char last-point)
1279                ;; Count replies.
1280                (while (re-search-forward "^[0-9]" nil t)
1281                  (setq received
1282                        (1+ received)))
1283                (setq last-point (point))
1284                (< received count))
1285         (accept-process-output (elmo-network-session-process-internal session)
1286                                1)
1287         (discard-input)
1288         (when (> count elmo-display-progress-threshold)
1289           (if (or (zerop (% received 10)) (= received count))
1290               (elmo-display-progress
1291                'elmo-nntp-groups-read-response "Getting folders info..."
1292                (/ (* received 100) count)))))
1293       (when (> count elmo-display-progress-threshold)
1294         (elmo-display-progress
1295          'elmo-nntp-groups-read-response "Getting folders info..." 100))
1296       ;; Wait for the reply from the final command.
1297       (goto-char (point-max))
1298       (re-search-backward "^[0-9]" nil t)
1299       (when (looking-at "^[23]")
1300         (while (progn
1301                  (goto-char (point-max))
1302                  (not (re-search-backward "\r?\n" (- (point) 3) t)))
1303           (accept-process-output
1304            (elmo-network-session-process-internal session) 1)
1305           (discard-input)))
1306       ;; Now all replies are received.  We remove CRs.
1307       (goto-char (point-min))
1308       (while (search-forward "\r" nil t)
1309         (replace-match "" t t))
1310       (copy-to-buffer outbuf (point-min) (point-max)))))
1311
1312 ;; from nntp.el [Gnus]
1313
1314 (defsubst elmo-nntp-next-result-arrived-p ()
1315   (cond
1316    ((eq (following-char) ?2)
1317     (if (re-search-forward "\n\\.\r?\n" nil t)
1318         t
1319       nil))
1320    ((looking-at "[34]")
1321     (if (search-forward "\n" nil t)
1322         t
1323       nil))
1324    (t
1325     nil)))
1326
1327 (defun elmo-nntp-retrieve-headers (session outbuf articles)
1328   "Retrieve the headers of ARTICLES."
1329   (with-current-buffer (elmo-network-session-buffer session)
1330     (erase-buffer)
1331     (let ((number (length articles))
1332           (count 0)
1333           (received 0)
1334           (last-point (point-min))
1335           article)
1336       ;; Send HEAD commands.
1337       (while (setq article (pop articles))
1338         (elmo-nntp-send-command session
1339                                 (format "head %s" article)
1340                                 'noerase)
1341         (setq count (1+ count))
1342         ;; Every 200 requests we have to read the stream in
1343         ;; order to avoid deadlocks.
1344         (when (or (null articles)       ;All requests have been sent.
1345                   (zerop (% count elmo-nntp-header-fetch-chop-length)))
1346           (accept-process-output
1347            (elmo-network-session-process-internal session) 1)
1348           (discard-input)
1349           (while (progn
1350                    (goto-char last-point)
1351                    ;; Count replies.
1352                    (while (elmo-nntp-next-result-arrived-p)
1353                      (setq last-point (point))
1354                      (setq received (1+ received)))
1355                    (< received count))
1356             (when (> number elmo-display-progress-threshold)
1357               (if (or (zerop (% received 20)) (= received number))
1358                   (elmo-display-progress
1359                    'elmo-nntp-retrieve-headers "Getting headers..."
1360                    (/ (* received 100) number))))
1361             (accept-process-output
1362              (elmo-network-session-process-internal session) 1)
1363             (discard-input))))
1364       (when (> number elmo-display-progress-threshold)
1365         (elmo-display-progress
1366          'elmo-nntp-retrieve-headers "Getting headers..." 100))
1367       (message "Getting headers...done")
1368       ;; Replace all CRLF with LF.
1369       (elmo-delete-cr-buffer)
1370       (copy-to-buffer outbuf (point-min) (point-max)))))
1371
1372 ;; end of from Gnus
1373
1374 (defun elmo-nntp-msgdb-create-message (len flag-table)
1375   (save-excursion
1376     (let ((new-msgdb (elmo-make-msgdb))
1377           beg entity i num message-id)
1378       (set-buffer-multibyte nil)
1379       (goto-char (point-min))
1380       (setq i 0)
1381       (message "Creating msgdb...")
1382       (while (not (eobp))
1383         (setq beg (save-excursion (forward-line 1) (point)))
1384         (setq num
1385               (and (looking-at "^2[0-9]*[ ]+\\([0-9]+\\)")
1386                    (string-to-int
1387                     (elmo-match-buffer 1))))
1388         (elmo-nntp-next-result-arrived-p)
1389         (when num
1390           (save-excursion
1391             (forward-line -1)
1392             (save-restriction
1393               (narrow-to-region beg (point))
1394               (setq entity
1395                     (elmo-msgdb-create-message-entity-from-buffer
1396                      (elmo-msgdb-message-entity-handler new-msgdb) num))
1397               (when entity
1398                 (setq message-id
1399                       (elmo-message-entity-field entity 'message-id))
1400                 (elmo-msgdb-append-entity
1401                  new-msgdb
1402                  entity
1403                  (elmo-flag-table-get flag-table message-id))))))
1404         (when (> len elmo-display-progress-threshold)
1405           (setq i (1+ i))
1406           (if (or (zerop (% i 20)) (= i len))
1407               (elmo-display-progress
1408                'elmo-nntp-msgdb-create-message "Creating msgdb..."
1409                (/ (* i 100) len)))))
1410       (when (> len elmo-display-progress-threshold)
1411         (elmo-display-progress
1412          'elmo-nntp-msgdb-create-message "Creating msgdb..." 100))
1413       new-msgdb)))
1414
1415 (luna-define-method elmo-message-use-cache-p ((folder elmo-nntp-folder) number)
1416   elmo-nntp-use-cache)
1417
1418 (defun elmo-nntp-parse-newsgroups (string &optional subscribe-only)
1419   (let ((nglist (elmo-parse string "[ \t\f\r\n,]*\\([^ \t\f\r\n,]+\\)"))
1420         ngs)
1421     (if (not subscribe-only)
1422         nglist
1423       (dolist (ng nglist)
1424         (if (intern-soft ng elmo-newsgroups-hashtb)
1425             (setq ngs (cons ng ngs))))
1426       ngs)))
1427
1428 ;;; Crosspost processing.
1429
1430 ;; 1. setup crosspost alist.
1431 ;;    1.1. When message is fetched and is crossposted message,
1432 ;;         it is remembered in `temp-crosses' slot.
1433 ;;         temp-crosses slot is a list of cons cell:
1434 ;;         (NUMBER . (MESSAGE-ID (LIST-OF-NEWSGROUPS) 'ng))
1435 ;;    1.2. In elmo-folder-close, `temp-crosses' slot is cleared,
1436 ;;    1.3. In elmo-folder-flag-as-read, move crosspost entry
1437 ;;         from `temp-crosses' slot to `elmo-crosspost-message-alist'.
1438
1439 ;; 2. process crosspost alist.
1440 ;;    2.1. At elmo-folder-process-crosspost, setup `reads' slot from
1441 ;;         `elmo-crosspost-message-alist'.
1442 ;;    2.2. remove crosspost entry for current newsgroup from
1443 ;;         `elmo-crosspost-message-alist'.
1444 ;;    2.3. elmo-folder-list-unreads return unread message list according to
1445 ;;         `reads' slot.
1446 ;;         (There's a problem that if `elmo-folder-list-unreads'
1447 ;;           never executed, crosspost information is thrown away.)
1448 ;;    2.4. In elmo-folder-close, `read' slot is cleared,
1449
1450 (defun elmo-nntp-setup-crosspost-buffer (folder number)
1451 ;;    1.1. When message is fetched and is crossposted message,
1452 ;;         it is remembered in `temp-crosses' slot.
1453 ;;         temp-crosses slot is a list of cons cell:
1454 ;;         (NUMBER . (MESSAGE-ID (LIST-OF-NEWSGROUPS) 'ng))
1455   (let (newsgroups crosspost-newsgroups message-id)
1456     (save-restriction
1457       (std11-narrow-to-header)
1458       (setq newsgroups (std11-fetch-field "newsgroups")
1459             message-id (std11-msg-id-string
1460                         (car (std11-parse-msg-id-string
1461                               (std11-fetch-field "message-id"))))))
1462     (when newsgroups
1463       (when (setq crosspost-newsgroups
1464                   (delete
1465                    (elmo-nntp-folder-group-internal folder)
1466                    (elmo-nntp-parse-newsgroups newsgroups t)))
1467         (unless (assq number
1468                       (elmo-nntp-folder-temp-crosses-internal folder))
1469           (elmo-nntp-folder-set-temp-crosses-internal
1470            folder
1471            (cons (cons number (list message-id crosspost-newsgroups 'ng))
1472                  (elmo-nntp-folder-temp-crosses-internal folder))))))))
1473
1474 (luna-define-method elmo-folder-close-internal ((folder elmo-nntp-folder))
1475 ;;    1.2. In elmo-folder-close, `temp-crosses' slot is cleared,
1476   (elmo-nntp-folder-set-temp-crosses-internal folder nil)
1477   (elmo-nntp-folder-set-reads-internal folder nil)
1478   )
1479
1480 (defun elmo-nntp-folder-update-crosspost-message-alist (folder numbers)
1481 ;;    1.3. In elmo-folder-flag-as-read, move crosspost entry
1482 ;;         from `temp-crosses' slot to `elmo-crosspost-message-alist'.
1483   (let (elem)
1484     (dolist (number numbers)
1485       (when (setq elem (assq number
1486                              (elmo-nntp-folder-temp-crosses-internal folder)))
1487         (unless (assoc (cdr (cdr elem)) elmo-crosspost-message-alist)
1488           (setq elmo-crosspost-message-alist
1489                 (cons (cdr elem) elmo-crosspost-message-alist)))
1490         (elmo-nntp-folder-set-temp-crosses-internal
1491          folder
1492          (delq elem (elmo-nntp-folder-temp-crosses-internal folder)))))))
1493
1494 (luna-define-method elmo-folder-set-flag :before ((folder elmo-nntp-folder)
1495                                                   numbers
1496                                                   flag
1497                                                   &optional is-local)
1498   (when (eq flag 'read)
1499     (elmo-nntp-folder-update-crosspost-message-alist folder numbers)))
1500
1501 (luna-define-method elmo-folder-unset-flag :before ((folder elmo-nntp-folder)
1502                                                     numbers
1503                                                     flag
1504                                                     &optional is-local)
1505   (when (eq flag 'unread)
1506     (elmo-nntp-folder-update-crosspost-message-alist folder numbers)))
1507
1508 (defsubst elmo-nntp-folder-process-crosspost (folder)
1509 ;;    2.1. At elmo-folder-process-crosspost, setup `reads' slot from
1510 ;;         `elmo-crosspost-message-alist'.
1511 ;;    2.2. remove crosspost entry for current newsgroup from
1512 ;;         `elmo-crosspost-message-alist'.
1513   (let (cross-deletes reads entity ngs)
1514     (dolist (cross elmo-crosspost-message-alist)
1515       (when (setq entity (elmo-message-entity folder (nth 0 cross)))
1516         (setq reads (cons (elmo-message-entity-number entity) reads)))
1517       (when entity
1518         (if (setq ngs (delete (elmo-nntp-folder-group-internal folder)
1519                               (nth 1 cross)))
1520             (setcar (cdr cross) ngs)
1521           (setq cross-deletes (cons cross cross-deletes)))
1522         (setq elmo-crosspost-message-alist-modified t)))
1523     (dolist (dele cross-deletes)
1524       (setq elmo-crosspost-message-alist (delq
1525                                           dele
1526                                           elmo-crosspost-message-alist)))
1527     (elmo-nntp-folder-set-reads-internal folder reads)))
1528
1529 (luna-define-method elmo-folder-process-crosspost ((folder elmo-nntp-folder))
1530   (elmo-nntp-folder-process-crosspost folder))
1531
1532 (luna-define-method elmo-folder-list-flagged :around ((folder elmo-nntp-folder)
1533                                                       flag &optional in-msgdb)
1534   ;;    2.3. elmo-folder-list-unreads return unread message list according to
1535   ;;         `reads' slot.
1536   (let ((msgs (luna-call-next-method)))
1537     (if in-msgdb
1538         msgs
1539       (case flag
1540         (unread
1541          (elmo-living-messages msgs (elmo-nntp-folder-reads-internal folder)))
1542         ;; Should consider read, digest and any flag?
1543         (otherwise
1544          msgs)))))
1545
1546 (require 'product)
1547 (product-provide (provide 'elmo-nntp) (require 'elmo-version))
1548
1549 ;;; elmo-nntp.el ends here