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
  36 (require 'elmo-vars)
  37 (require 'elmo-util)
  38 (require 'elmo-date)
  39 (require 'elmo-msgdb)
  40 (require 'elmo-cache)
  41 (require 'elmo)
  42 (require 'elmo-net)
  43
  44 (defvar elmo-nntp-overview-fetch-chop-length 200
  45  "*Number of overviews to fetch in one request in nntp.")
  46
  47 (defvar elmo-nntp-use-cache t
  48   "Use cache in nntp folder.")
  49
  50 (defvar elmo-nntp-max-number-precedes-list-active nil
  51   "Non-nil means max number of msgdb is set as the max number of `list active'.
  52 \(Needed for inn 2.3 or later?\).")
  53
  54 (defvar elmo-nntp-group-coding-system nil
  55   "A coding system for newsgroup string.")
  56
  57 (defsubst elmo-nntp-encode-group-string (string)
  58   (if elmo-nntp-group-coding-system
  59       (encode-coding-string string elmo-nntp-group-coding-system)
  60     string))
  61
  62 (defsubst elmo-nntp-decode-group-string (string)
  63   (if elmo-nntp-group-coding-system
  64       (decode-coding-string string elmo-nntp-group-coding-system)
  65     string))
  66
  67 ;; For debugging.
  68 (defvar elmo-nntp-debug nil
  69   "Non-nil forces NNTP folder as debug mode.
  70 Debug information is inserted in the buffer \"*NNTP DEBUG*\"")
  71
  72 ;;; Debug
  73 (defsubst elmo-nntp-debug (message &rest args)
  74   (if elmo-nntp-debug
  75       (let ((biff (string-match "BIFF-" (buffer-name)))
  76             pos)
  77         (with-current-buffer (get-buffer-create (concat "*NNTP DEBUG*"
  78                                                         (if biff "BIFF")))
  79           (goto-char (point-max))
  80           (setq pos (point))
  81           (insert (apply 'format message args) "\n")))))
  82
  83 ;;; ELMO NNTP folder
  84 (eval-and-compile
  85   (luna-define-class elmo-nntp-folder (elmo-net-folder)
  86                      (group temp-crosses reads))
  87   (luna-define-internal-accessors 'elmo-nntp-folder))
  88
  89 (luna-define-method elmo-folder-initialize :around ((folder
  90                                                      elmo-nntp-folder)
  91                                                     name)
  92   (let ((elmo-network-stream-type-alist
  93          (if elmo-nntp-stream-type-alist
  94              (setq elmo-network-stream-type-alist
  95                    (append elmo-nntp-stream-type-alist
  96                            elmo-network-stream-type-alist))
  97            elmo-network-stream-type-alist))
  98         explicit-user parse)
  99     (setq name (luna-call-next-method))
 100     (setq parse (elmo-parse-token name ":"))
 101     (elmo-nntp-folder-set-group-internal folder
 102                                          (elmo-nntp-encode-group-string
 103                                           (car parse)))
 104     (setq explicit-user (eq ?: (string-to-char (cdr parse))))
 105     (setq parse (elmo-parse-prefixed-element ?: (cdr parse)))
 106     (elmo-net-folder-set-user-internal folder
 107                                        (if (eq (length (car parse)) 0)
 108                                            (unless explicit-user
 109                                              elmo-nntp-default-user)
 110                                          (car parse)))
 111     (unless (elmo-net-folder-server-internal folder)
 112       (elmo-net-folder-set-server-internal folder
 113                                            elmo-nntp-default-server))
 114     (unless (elmo-net-folder-port-internal folder)
 115       (elmo-net-folder-set-port-internal folder
 116                                          elmo-nntp-default-port))
 117     (unless (elmo-net-folder-stream-type-internal folder)
 118       (elmo-net-folder-set-stream-type-internal
 119        folder
 120        (elmo-get-network-stream-type
 121         elmo-nntp-default-stream-type)))
 122     folder))
 123
 124 (luna-define-method elmo-folder-expand-msgdb-path ((folder elmo-nntp-folder))
 125   (convert-standard-filename
 126    (expand-file-name
 127     (elmo-nntp-folder-group-internal folder)
 128     (expand-file-name (or (elmo-net-folder-server-internal folder) "nowhere")
 129                       (expand-file-name "nntp"
 130                                         elmo-msgdb-directory)))))
 131
 132 (luna-define-method elmo-folder-newsgroups ((folder elmo-nntp-folder))
 133   (list (elmo-nntp-folder-group-internal folder)))
 134
 135 ;;; NNTP Session
 136 (eval-and-compile
 137   (luna-define-class elmo-nntp-session (elmo-network-session)
 138                      (current-group))
 139   (luna-define-internal-accessors 'elmo-nntp-session))
 140
 141 ;;
 142 ;; internal variables
 143 ;;
 144
 145 (defvar elmo-nntp-connection-cache nil
 146   "Cache of NNTP connection.")
 147 ;; buffer local variable
 148
 149 (defvar elmo-nntp-list-folders-use-cache 600
 150   "*Time to cache of list folders, as the number of seconds.
 151 Don't cache if nil.")
 152
 153 (defvar elmo-nntp-list-folders-cache nil)
 154
 155 (defvar elmo-nntp-groups-async nil)
 156 (defvar elmo-nntp-header-fetch-chop-length 200)
 157
 158 (defvar elmo-nntp-read-point 0)
 159
 160 (defvar elmo-nntp-send-mode-reader t)
 161
 162 (defvar elmo-nntp-opened-hook nil)
 163
 164 (defvar elmo-nntp-get-folders-securely nil)
 165
 166 (defvar elmo-nntp-default-use-xover t)
 167
 168 (defvar elmo-nntp-default-use-listgroup t)
 169
 170 (defvar elmo-nntp-default-use-list-active t)
 171
 172 (defvar elmo-nntp-default-use-xhdr t)
 173
 174 (defvar elmo-nntp-server-command-alist nil)
 175
 176
 177 (defconst elmo-nntp-server-command-index '((xover . 0)
 178                                            (listgroup . 1)
 179                                            (list-active . 2)))
 180
 181 (defmacro elmo-nntp-get-server-command (session)
 182   (` (assoc (cons (elmo-network-session-server-internal (, session))
 183                   (elmo-network-session-port-internal (, session)))
 184             elmo-nntp-server-command-alist)))
 185
 186 (defmacro elmo-nntp-set-server-command (session com value)
 187   (` (let (entry)
 188        (unless (setq entry (cdr (elmo-nntp-get-server-command
 189                                  (, session))))
 190          (setq elmo-nntp-server-command-alist
 191                (nconc elmo-nntp-server-command-alist
 192                       (list (cons
 193                              (cons
 194                               (elmo-network-session-server-internal (, session))
 195                               (elmo-network-session-port-internal (, session)))
 196                              (setq entry
 197                                    (vector
 198                                     elmo-nntp-default-use-xover
 199                                     elmo-nntp-default-use-listgroup
 200                                     elmo-nntp-default-use-list-active
 201                                     elmo-nntp-default-use-xhdr)))))))
 202        (aset entry
 203              (cdr (assq (, com) elmo-nntp-server-command-index))
 204              (, value)))))
 205
 206 (defmacro elmo-nntp-xover-p (session)
 207   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 208        (if entry
 209            (aref (cdr entry)
 210                  (cdr (assq 'xover elmo-nntp-server-command-index)))
 211          elmo-nntp-default-use-xover))))
 212
 213 (defmacro elmo-nntp-set-xover (session value)
 214   (` (elmo-nntp-set-server-command (, session) 'xover (, value))))
 215
 216 (defmacro elmo-nntp-listgroup-p (session)
 217   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 218        (if entry
 219            (aref (cdr entry)
 220                  (cdr (assq 'listgroup elmo-nntp-server-command-index)))
 221          elmo-nntp-default-use-listgroup))))
 222
 223 (defmacro elmo-nntp-set-listgroup (session value)
 224   (` (elmo-nntp-set-server-command (, session) 'listgroup (, value))))
 225
 226 (defmacro elmo-nntp-list-active-p (session)
 227   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 228        (if entry
 229            (aref (cdr entry)
 230                  (cdr (assq 'list-active elmo-nntp-server-command-index)))
 231          elmo-nntp-default-use-list-active))))
 232
 233 (defmacro elmo-nntp-set-list-active (session value)
 234   (` (elmo-nntp-set-server-command (, session) 'list-active (, value))))
 235
 236 (defmacro elmo-nntp-xhdr-p (session)
 237   (` (let ((entry (elmo-nntp-get-server-command (, session))))
 238        (if entry
 239            (aref (cdr entry)
 240                  (cdr (assq 'xhdr elmo-nntp-server-command-index)))
 241          elmo-nntp-default-use-xhdr))))
 242
 243 (defmacro elmo-nntp-set-xhdr (session value)
 244   (` (elmo-nntp-set-server-command (, session) 'xhdr (, value))))
 245
 246 (defsubst elmo-nntp-max-number-precedes-list-active-p ()
 247   elmo-nntp-max-number-precedes-list-active)
 248
 249 (defsubst elmo-nntp-folder-postfix (user server port type)
 250   (concat
 251    (and user (concat ":" user))
 252    (if (and server
 253             (null (string= server elmo-nntp-default-server)))
 254        (concat "@" server))
 255    (if (and port
 256             (null (eq port elmo-nntp-default-port)))
 257        (concat ":" (if (numberp port)
 258                        (int-to-string port) port)))
 259    (unless (eq (elmo-network-stream-type-symbol type)
 260                elmo-nntp-default-stream-type)
 261      (elmo-network-stream-type-spec-string type))))
 262
 263 (defun elmo-nntp-get-session (folder &optional if-exists)
 264   (elmo-network-get-session
 265    'elmo-nntp-session
 266    (concat
 267     (if (elmo-folder-biff-internal folder)
 268         "BIFF-")
 269     "NNTP")
 270    folder
 271    if-exists))
 272
 273 (luna-define-method elmo-network-initialize-session ((session
 274                                                       elmo-nntp-session))
 275   (let ((process (elmo-network-session-process-internal session))
 276         response)
 277     (set-process-filter (elmo-network-session-process-internal session)
 278                         'elmo-nntp-process-filter)
 279     (with-current-buffer (elmo-network-session-buffer session)
 280       (setq elmo-nntp-read-point (point-min))
 281       ;; Skip garbage output from process before greeting.
 282       (while (and (memq (process-status process) '(open run))
 283                   (goto-char (point-max))
 284                   (forward-line -1)
 285                   (not (looking-at "^[2-5][0-9][0-9]")))
 286         (accept-process-output process 1))
 287       (setq elmo-nntp-read-point (point))
 288       (setq response (elmo-nntp-read-response session t t))
 289       (unless (car response)
 290           (signal 'elmo-open-error (list (cdr response))))
 291       (if elmo-nntp-send-mode-reader
 292           (elmo-nntp-send-mode-reader session))
 293       (when (eq (elmo-network-stream-type-symbol
 294                  (elmo-network-session-stream-type-internal session))
 295                 'starttls)
 296         (elmo-nntp-send-command session "starttls")
 297         (or (elmo-nntp-read-response session)
 298             (error "Cannot open starttls session"))
 299         (starttls-negotiate process)))))
 300
 301 (luna-define-method elmo-network-authenticate-session ((session
 302                                                         elmo-nntp-session))
 303   (with-current-buffer (elmo-network-session-buffer session)
 304     (when (elmo-network-session-user-internal session)
 305       (elmo-nntp-send-command session
 306                               (format "authinfo user %s"
 307                                       (elmo-network-session-user-internal
 308                                        session))
 309                               nil
 310                               'no-log)
 311       (or (elmo-nntp-read-response session)
 312           (signal 'elmo-authenticate-error '(authinfo)))
 313       (elmo-nntp-send-command
 314        session
 315        (format "authinfo pass %s"
 316                (elmo-get-passwd (elmo-network-session-password-key session)))
 317        nil
 318        'no-log)
 319       (or (elmo-nntp-read-response session)
 320           (signal 'elmo-authenticate-error '(authinfo))))))
 321
 322 (luna-define-method elmo-network-setup-session ((session
 323                                                  elmo-nntp-session))
 324   (run-hooks 'elmo-nntp-opened-hook))
 325
 326 (defun elmo-nntp-process-filter (process output)
 327   (when (buffer-live-p (process-buffer process))
 328     (with-current-buffer (process-buffer process)
 329       (goto-char (point-max))
 330       (insert output)
 331       (elmo-nntp-debug "RECEIVED: %s\n" output))))
 332
 333 (defun elmo-nntp-send-mode-reader (session)
 334   (elmo-nntp-send-command session "mode reader")
 335   (if (null (elmo-nntp-read-response session t))
 336       (message "Mode reader failed")))
 337
 338 (defun elmo-nntp-send-command (session command &optional noerase no-log)
 339   (with-current-buffer (elmo-network-session-buffer session)
 340     (unless noerase
 341       (erase-buffer)
 342       (goto-char (point-min)))
 343     (setq elmo-nntp-read-point (point))
 344     (elmo-nntp-debug "SEND: %s\n" (if no-log "<NO LOGGING>" command))
 345     (process-send-string (elmo-network-session-process-internal
 346                           session) command)
 347     (process-send-string (elmo-network-session-process-internal
 348                           session) "\r\n")))
 349
 350 (defun elmo-nntp-read-response (session &optional not-command error-msg)
 351   (with-current-buffer (elmo-network-session-buffer session)
 352     (let ((process (elmo-network-session-process-internal session))
 353           (case-fold-search nil)
 354           (response-string nil)
 355           (response-continue t)
 356           response match-end)
 357       (while response-continue
 358         (goto-char elmo-nntp-read-point)
 359         (while (not (search-forward "\r\n" nil t))
 360           (accept-process-output process)
 361           (goto-char elmo-nntp-read-point))
 362         (setq match-end (point))
 363         (setq response-string
 364               (buffer-substring elmo-nntp-read-point (- match-end 2)))
 365         (goto-char elmo-nntp-read-point)
 366         (if (looking-at "[23][0-9]+ .*$")
 367             (progn (setq response-continue nil)
 368                    (setq elmo-nntp-read-point match-end)
 369                    (setq response
 370                          (if response
 371                              (concat response "\n" response-string)
 372                            response-string)))
 373           (if (looking-at "[^23][0-9]+ .*$")
 374               (progn (setq response-continue nil)
 375                      (setq elmo-nntp-read-point match-end)
 376                      (setq response nil))
 377             (setq elmo-nntp-read-point match-end)
 378             (if not-command
 379                 (setq response-continue nil))
 380             (setq response
 381                   (if response
 382                       (concat response "\n" response-string)
 383                     response-string)))
 384           (setq elmo-nntp-read-point match-end)))
 385       (if error-msg
 386           (cons response response-string)
 387         response))))
 388
 389 (defun elmo-nntp-read-raw-response (session)
 390   (with-current-buffer (elmo-network-session-buffer session)
 391     (goto-char elmo-nntp-read-point)
 392     (while (not (search-forward "\r\n" nil t))
 393       (accept-process-output (elmo-network-session-process-internal
 394                               session))
 395       (goto-char elmo-nntp-read-point))
 396     (buffer-substring elmo-nntp-read-point (- (point) 2))))
 397
 398 (defun elmo-nntp-read-contents (session)
 399   (with-current-buffer (elmo-network-session-buffer session)
 400     (goto-char elmo-nntp-read-point)
 401     (while (not (re-search-forward "^\\.\r\n" nil t))
 402       (accept-process-output (elmo-network-session-process-internal
 403                               session))
 404       (goto-char elmo-nntp-read-point))
 405     (elmo-delete-cr
 406      (buffer-substring elmo-nntp-read-point
 407                        (- (point) 3)))))
 408
 409 (defun elmo-nntp-read-body (session outbuf)
 410   (with-current-buffer (elmo-network-session-buffer session)
 411     (goto-char elmo-nntp-read-point)
 412     (while (not (re-search-forward "^\\.\r\n" nil t))
 413       (accept-process-output (elmo-network-session-process-internal session))
 414       (goto-char elmo-nntp-read-point))
 415     (let ((start elmo-nntp-read-point)
 416           (end  (point)))
 417       (with-current-buffer outbuf
 418         (erase-buffer)
 419         (insert-buffer-substring (elmo-network-session-buffer session)
 420                                  start (- end 3))
 421         (elmo-delete-cr-buffer)))
 422     t))
 423
 424 (defun elmo-nntp-select-group (session group &optional force)
 425   (let (response)
 426     (when (or force
 427               (not (string= (elmo-nntp-session-current-group-internal session)
 428                             group)))
 429       (unwind-protect
 430           (progn
 431             (elmo-nntp-send-command session (format "group %s" group))
 432             (setq response (elmo-nntp-read-response session)))
 433         (elmo-nntp-session-set-current-group-internal session
 434                                                       (and response group))
 435         response))))
 436
 437 (defun elmo-nntp-list-folders-get-cache (group server buf)
 438   (when (and elmo-nntp-list-folders-use-cache
 439              elmo-nntp-list-folders-cache
 440              (string-match (concat "^"
 441                                    (regexp-quote
 442                                     (or
 443                                      (nth 1 elmo-nntp-list-folders-cache)
 444                                      "")))
 445                            (or group ""))
 446              (string-match (concat "^"
 447                                    (regexp-quote
 448                                     (or
 449                                      (nth 2 elmo-nntp-list-folders-cache)
 450                                      "")))
 451                            (or server "")))
 452     (let* ((cache-time (car elmo-nntp-list-folders-cache)))
 453       (unless (elmo-time-expire cache-time
 454                                 elmo-nntp-list-folders-use-cache)
 455         (save-excursion
 456           (set-buffer buf)
 457           (erase-buffer)
 458           (insert (nth 3 elmo-nntp-list-folders-cache))
 459           (goto-char (point-min))
 460           (or (string= group "")
 461               (and group
 462                    (keep-lines (concat "^" (regexp-quote group) "\\."))))
 463           t
 464           )))))
 465
 466 (defsubst elmo-nntp-catchup-msgdb (msgdb max-number)
 467   (let ((numbers (elmo-msgdb-list-messages msgdb))
 468         msgdb-max)
 469     (setq msgdb-max (if numbers (apply #'max numbers) 0))
 470     (when (and msgdb-max
 471                max-number
 472                (< msgdb-max max-number))
 473       (let ((i (1+ msgdb-max))
 474             killed)
 475         (while (<= i max-number)
 476           (setq killed (cons i killed))
 477           (incf i))
 478         (nreverse killed)))))
 479
 480 (luna-define-method elmo-folder-list-subfolders ((folder elmo-nntp-folder)
 481                                                  &optional one-level)
 482   (elmo-nntp-folder-list-subfolders folder one-level))
 483
 484 (defun elmo-nntp-folder-list-subfolders (folder one-level)
 485   (let ((session (elmo-nntp-get-session folder))
 486         (case-fold-search nil)
 487         response ret-val top-ng username append-serv use-list-active start)
 488     (with-temp-buffer
 489       (set-buffer-multibyte nil)
 490       (if (and (elmo-nntp-folder-group-internal folder)
 491                (elmo-nntp-select-group
 492                 session
 493                 (elmo-nntp-folder-group-internal folder)))
 494           ;; add top newsgroups
 495           (setq ret-val (list (elmo-nntp-folder-group-internal folder))))
 496       (unless (setq response (elmo-nntp-list-folders-get-cache
 497                               (elmo-nntp-folder-group-internal folder)
 498                               (elmo-net-folder-server-internal folder)
 499                               (current-buffer)))
 500         (when (setq use-list-active (elmo-nntp-list-active-p session))
 501           (elmo-nntp-send-command
 502            session
 503            (concat "list"
 504                    (if (and (elmo-nntp-folder-group-internal folder)
 505                             (not (string= (elmo-nntp-folder-group-internal
 506                                            folder) "")))
 507                        (concat " active"
 508                                (format
 509                                 " %s.*"
 510                                 (elmo-nntp-folder-group-internal folder))))))
 511           (if (elmo-nntp-read-response session t)
 512               (if (null (setq response (elmo-nntp-read-contents session)))
 513                   (error "NNTP List folders failed")
 514                 (when elmo-nntp-list-folders-use-cache
 515                   (setq elmo-nntp-list-folders-cache
 516                         (list (current-time)
 517                               (elmo-nntp-folder-group-internal folder)
 518                               (elmo-net-folder-server-internal folder)
 519                               response)))
 520                 (erase-buffer)
 521                 (insert response))
 522             (elmo-nntp-set-list-active session nil)
 523             (setq use-list-active nil)))
 524         (when (null use-list-active)
 525           (elmo-nntp-send-command session "list")
 526           (if (null (and (elmo-nntp-read-response session t)
 527                          (setq response (elmo-nntp-read-contents session))))
 528               (error "NNTP List folders failed"))
 529           (when elmo-nntp-list-folders-use-cache
 530             (setq elmo-nntp-list-folders-cache
 531                   (list (current-time) nil nil response)))
 532           (erase-buffer)
 533           (setq start nil)
 534           (while (string-match (concat "^"
 535                                        (regexp-quote
 536                                         (or
 537                                          (elmo-nntp-folder-group-internal
 538                                           folder)
 539                                          "")) ".*$")
 540                                response start)
 541             (insert (match-string 0 response) "\n")
 542             (setq start (match-end 0)))))
 543       (goto-char (point-min))
 544       (let ((len (count-lines (point-min) (point-max)))
 545             (i 0) regexp)
 546         (if one-level
 547             (progn
 548               (setq regexp
 549                     (format "^\\(%s[^. ]+\\)\\([. ]\\).*\n"
 550                             (if (and (elmo-nntp-folder-group-internal folder)
 551                                      (null (string=
 552                                             (elmo-nntp-folder-group-internal
 553                                              folder) "")))
 554                                 (concat (elmo-nntp-folder-group-internal
 555                                          folder)
 556                                         "\\.")
 557                               "")))
 558               (while (looking-at regexp)
 559                 (setq top-ng (elmo-match-buffer 1))
 560                 (if (string= (elmo-match-buffer 2) " ")
 561                     (if (not (or (member top-ng ret-val)
 562                                  (assoc top-ng ret-val)))
 563                         (setq ret-val (nconc ret-val (list top-ng))))
 564                   (if (member top-ng ret-val)
 565                       (setq ret-val (delete top-ng ret-val)))
 566                   (if (not (assoc top-ng ret-val))
 567                       (setq ret-val (nconc ret-val (list (list top-ng))))))
 568                 (when (> len elmo-display-progress-threshold)
 569                   (setq i (1+ i))
 570                   (if (or (zerop (% i 10)) (= i len))
 571                       (elmo-display-progress
 572                        'elmo-nntp-list-folders "Parsing active..."
 573                        (/ (* i 100) len))))
 574                 (forward-line 1)))
 575           (while (re-search-forward "\\([^ ]+\\) .*\n" nil t)
 576             (setq ret-val (nconc ret-val
 577                                  (list (elmo-match-buffer 1))))
 578             (when (> len elmo-display-progress-threshold)
 579               (setq i (1+ i))
 580               (if (or (zerop (% i 10)) (= i len))
 581                   (elmo-display-progress
 582                    'elmo-nntp-list-folders "Parsing active..."
 583                    (/ (* i 100) len))))))
 584         (when (> len elmo-display-progress-threshold)
 585           (elmo-display-progress
 586            'elmo-nntp-list-folders "Parsing active..." 100))))
 587
 588     (setq username (elmo-net-folder-user-internal folder))
 589     (when (and username
 590                elmo-nntp-default-user
 591                (string= username elmo-nntp-default-user))
 592       (setq username nil))
 593
 594     (when (or username ; XXX: ad-hoc fix against username includes "@"
 595               (not (string= (elmo-net-folder-server-internal folder)
 596                             elmo-nntp-default-server)))
 597       (setq append-serv (concat "@" (elmo-net-folder-server-internal
 598                                      folder))))
 599     (unless (eq (elmo-net-folder-port-internal folder) elmo-nntp-default-port)
 600       (setq append-serv (concat append-serv
 601                                 ":" (int-to-string
 602                                      (elmo-net-folder-port-internal folder)))))
 603     (unless (eq (elmo-network-stream-type-symbol
 604                  (elmo-net-folder-stream-type-internal folder))
 605                 elmo-nntp-default-stream-type)
 606       (setq append-serv
 607             (concat append-serv
 608                     (elmo-network-stream-type-spec-string
 609                      (elmo-net-folder-stream-type-internal folder)))))
 610     (mapcar '(lambda (fld)
 611                (if (consp fld)
 612                    (list (concat "-" (elmo-nntp-decode-group-string (car fld))
 613                                  (and username
 614                                       (concat
 615                                        ":"
 616                                        username))
 617                                  (and append-serv
 618                                       (concat append-serv))))
 619                  (concat "-" (elmo-nntp-decode-group-string fld)
 620                          (and username
 621                               (concat ":" username))
 622                          (and append-serv
 623                               (concat append-serv)))))
 624             ret-val)))
 625
 626 (defun elmo-nntp-make-msglist (beg-str end-str)
 627   (elmo-set-work-buf
 628    (let ((beg-num (string-to-int beg-str))
 629          (end-num (string-to-int end-str))
 630          i)
 631      (setq i beg-num)
 632      (insert "(")
 633      (while (<= i end-num)
 634        (insert (format "%s " i))
 635        (setq i (1+ i)))
 636      (insert ")")
 637      (goto-char (point-min))
 638      (read (current-buffer)))))
 639
 640 (luna-define-method elmo-folder-list-messages-plugged ((folder
 641                                                         elmo-nntp-folder)
 642                                                        &optional nohide)
 643   (let ((session (elmo-nntp-get-session folder))
 644         (group   (elmo-nntp-folder-group-internal folder))
 645         response numbers use-listgroup)
 646     (save-excursion
 647       (when (setq use-listgroup (elmo-nntp-listgroup-p session))
 648         (elmo-nntp-send-command session
 649                                 (format "listgroup %s" group))
 650         (if (not (elmo-nntp-read-response session t))
 651             (progn
 652               (elmo-nntp-set-listgroup session nil)
 653               (setq use-listgroup nil))
 654           (if (null (setq response (elmo-nntp-read-contents session)))
 655               (error "Fetching listgroup failed"))
 656           (setq numbers (elmo-string-to-list response))
 657           (elmo-nntp-session-set-current-group-internal session
 658                                                         group)))
 659       (unless use-listgroup
 660         (elmo-nntp-send-command session (format "group %s" group))
 661         (if (null (setq response (elmo-nntp-read-response session)))
 662             (error "Select group failed"))
 663         (when (and
 664                (string-match
 665                 "211 \\([0-9]+\\) \\([0-9]+\\) \\([0-9]+\\) [^.].+$"
 666                 response)
 667                (> (string-to-int (elmo-match-string 1 response)) 0))
 668           (setq numbers (elmo-nntp-make-msglist
 669                          (elmo-match-string 2 response)
 670                          (elmo-match-string 3 response)))))
 671       numbers)))
 672
 673 (luna-define-method elmo-folder-status ((folder elmo-nntp-folder))
 674   (elmo-nntp-folder-status folder))
 675
 676 (defun elmo-nntp-folder-status (folder)
 677   (let ((killed-list (elmo-msgdb-killed-list-load
 678                       (elmo-folder-msgdb-path folder)))
 679         end-num entry)
 680     (if elmo-nntp-groups-async
 681         (if (setq entry
 682                   (elmo-get-hash-val
 683                    (concat (elmo-nntp-folder-group-internal folder)
 684                            (elmo-nntp-folder-postfix
 685                             (elmo-net-folder-user-internal folder)
 686                             (elmo-net-folder-server-internal folder)
 687                             (elmo-net-folder-port-internal folder)
 688                             (elmo-net-folder-stream-type-internal folder)))
 689                    elmo-newsgroups-hashtb))
 690             (progn
 691               (setq end-num (nth 2 entry))
 692               (when (and killed-list
 693                          (elmo-number-set-member end-num killed-list))
 694                 ;; Max is killed.
 695                 (setq end-num nil))
 696               (cons end-num (car entry)))
 697           (error "No such newsgroup \"%s\""
 698                  (elmo-nntp-folder-group-internal folder)))
 699       (let ((session (elmo-nntp-get-session folder))
 700             response e-num)
 701         (if (null session)
 702             (error "Connection failed"))
 703         (save-excursion
 704           (elmo-nntp-send-command session
 705                                   (format
 706                                    "group %s"
 707                                    (elmo-nntp-folder-group-internal folder)))
 708           (setq response (elmo-nntp-read-response session))
 709           (if (and response
 710                    (string-match
 711                     "211 \\([0-9]+\\) \\([0-9]+\\) \\([0-9]+\\) [^.].+$"
 712                     response))
 713               (progn
 714                 (setq end-num (string-to-int
 715                                (elmo-match-string 3 response)))
 716                 (setq e-num (string-to-int
 717                              (elmo-match-string 1 response)))
 718                 (when (and killed-list
 719                            (elmo-number-set-member end-num killed-list))
 720                   ;; Max is killed.
 721                   (setq end-num nil))
 722                 (cons end-num e-num))
 723             (if (null response)
 724                 (error "Selecting newsgroup \"%s\" failed"
 725                        (elmo-nntp-folder-group-internal folder))
 726               nil)))))))
 727
 728 (defconst elmo-nntp-overview-index
 729   '(("number" . 0)
 730     ("subject" . 1)
 731     ("from" . 2)
 732     ("date" . 3)
 733     ("message-id" . 4)
 734     ("references" . 5)
 735     ("size" . 6)
 736     ("lines" . 7)
 737     ("xref" . 8)))
 738
 739 (defun elmo-nntp-create-msgdb-from-overview-string (folder
 740                                                     str
 741                                                     flag-table
 742                                                     &optional numlist)
 743   (let ((new-msgdb (elmo-make-msgdb))
 744         ov-list message-id entity
 745         ov-entity num
 746         extras extra ext field field-index flags)
 747     (setq ov-list (elmo-nntp-parse-overview-string str))
 748     (while ov-list
 749       (setq ov-entity (car ov-list))
 750 ;;; INN bug??
 751 ;;;   (if (or (> (setq num (string-to-int (aref ov-entity 0)))
 752 ;;;              99999)
 753 ;;;           (<= num 0))
 754 ;;;       (setq num 0))
 755 ;;;  (setq num (int-to-string num))
 756       (setq num (string-to-int (aref ov-entity 0)))
 757       (when (or (null numlist)
 758                 (memq num numlist))
 759         (setq extras elmo-msgdb-extra-fields
 760               extra nil)
 761         (while extras
 762           (setq ext (downcase (car extras)))
 763           (when (setq field-index (cdr (assoc ext elmo-nntp-overview-index)))
 764             (when (> (length ov-entity) field-index)
 765               (setq field (aref ov-entity field-index))
 766               (when (eq field-index 8) ;; xref
 767                 (setq field (elmo-msgdb-remove-field-string field)))
 768               (setq extra (cons (cons ext field) extra))))
 769           (setq extras (cdr extras)))
 770         (setq entity (elmo-msgdb-make-message-entity
 771                       (elmo-msgdb-message-entity-handler new-msgdb)
 772                       :message-id (aref ov-entity 4)
 773                       :number     num
 774                       :references (elmo-msgdb-get-last-message-id
 775                                     (aref ov-entity 5))
 776                       :from       (elmo-mime-string (elmo-delete-char
 777                                                      ?\"
 778                                                      (or
 779                                                       (aref ov-entity 2)
 780                                                       elmo-no-from) 'uni))
 781                       :subject    (elmo-mime-string (or (aref ov-entity 1)
 782                                                         elmo-no-subject))
 783                       :date       (aref ov-entity 3)
 784                       :size       (string-to-int (aref ov-entity 6))
 785                       :extra      extra))
 786         (setq message-id (elmo-message-entity-field entity 'message-id)
 787               flags (elmo-flag-table-get flag-table message-id))
 788         (elmo-global-flags-set flags folder num message-id)
 789         (elmo-msgdb-append-entity new-msgdb entity flags))
 790       (setq ov-list (cdr ov-list)))
 791     new-msgdb))
 792
 793 (luna-define-method elmo-folder-msgdb-create ((folder elmo-nntp-folder)
 794                                               numbers flag-table)
 795   (elmo-nntp-folder-msgdb-create folder numbers flag-table))
 796
 797 (defun elmo-nntp-folder-msgdb-create (folder numbers flag-table)
 798   (let ((filter numbers)
 799         (session (elmo-nntp-get-session folder))
 800         (new-msgdb (elmo-make-msgdb))
 801         beg-num end-num cur length
 802         new-msgdb ov-str use-xover dir)
 803     (elmo-nntp-select-group session (elmo-nntp-folder-group-internal
 804                                      folder))
 805     (when (setq use-xover (elmo-nntp-xover-p session))
 806       (setq beg-num (car numbers)
 807             cur beg-num
 808             end-num (nth (1- (length numbers)) numbers)
 809             length  (+ (- end-num beg-num) 1))
 810       (message "Getting overview...")
 811       (while (<= cur end-num)
 812         (elmo-nntp-send-command
 813          session
 814          (format
 815           "xover %s-%s"
 816           (int-to-string cur)
 817           (int-to-string
 818            (+ cur
 819               elmo-nntp-overview-fetch-chop-length))))
 820         (with-current-buffer (elmo-network-session-buffer session)
 821           (if ov-str
 822               (elmo-msgdb-append
 823                new-msgdb
 824                (elmo-nntp-create-msgdb-from-overview-string
 825                 folder
 826                 ov-str
 827                 flag-table
 828                 filter))))
 829         (if (null (elmo-nntp-read-response session t))
 830             (progn
 831               (setq cur end-num);; exit while loop
 832               (elmo-nntp-set-xover session nil)
 833               (setq use-xover nil))
 834           (if (null (setq ov-str (elmo-nntp-read-contents session)))
 835               (error "Fetching overview failed")))
 836         (setq cur (+ elmo-nntp-overview-fetch-chop-length cur 1))
 837         (when (> length elmo-display-progress-threshold)
 838           (elmo-display-progress
 839            'elmo-nntp-msgdb-create "Getting overview..."
 840            (/ (* (+ (- (min cur end-num)
 841                        beg-num) 1) 100) length))))
 842       (when (> length elmo-display-progress-threshold)
 843         (elmo-display-progress
 844          'elmo-nntp-msgdb-create "Getting overview..." 100)))
 845     (if (not use-xover)
 846         (setq new-msgdb (elmo-nntp-msgdb-create-by-header
 847                          session numbers flag-table))
 848       (with-current-buffer (elmo-network-session-buffer session)
 849         (if ov-str
 850             (elmo-msgdb-append
 851              new-msgdb
 852              (elmo-nntp-create-msgdb-from-overview-string
 853               folder
 854               ov-str
 855               flag-table
 856               filter)))))
 857     (elmo-folder-set-killed-list-internal
 858      folder
 859      (nconc
 860       (elmo-folder-killed-list-internal folder)
 861       (car (elmo-list-diff
 862             numbers
 863             (elmo-msgdb-list-messages new-msgdb)))))
 864     ;; If there are canceled messages, overviews are not obtained
 865     ;; to max-number(inn 2.3?).
 866     (when (and (elmo-nntp-max-number-precedes-list-active-p)
 867                (elmo-nntp-list-active-p session))
 868       (elmo-nntp-send-command session
 869                               (format "list active %s"
 870                                       (elmo-nntp-folder-group-internal
 871                                        folder)))
 872       (if (null (elmo-nntp-read-response session))
 873           (progn
 874             (elmo-nntp-set-list-active session nil)
 875             (error "NNTP list command failed")))
 876       (let ((killed (elmo-nntp-catchup-msgdb
 877                      new-msgdb
 878                      (nth 1 (read (concat "(" (elmo-nntp-read-contents
 879                                                session) ")"))))))
 880         (when killed
 881           (elmo-folder-kill-messages folder killed))))
 882     new-msgdb))
 883
 884 (luna-define-method elmo-folder-update-number ((folder elmo-nntp-folder))
 885   (when (elmo-nntp-max-number-precedes-list-active-p)
 886     (let ((session (elmo-nntp-get-session folder)))
 887       (when (elmo-nntp-list-active-p session)
 888         (let ((numbers (elmo-folder-list-messages folder nil 'in-msgdb))
 889               msgdb-max max-number)
 890           ;; If there are canceled messages, overviews are not obtained
 891           ;; to max-number(inn 2.3?).
 892           (elmo-nntp-select-group session
 893                                   (elmo-nntp-folder-group-internal folder))
 894           (elmo-nntp-send-command session
 895                                   (format "list active %s"
 896                                           (elmo-nntp-folder-group-internal
 897                                            folder)))
 898           (if (null (elmo-nntp-read-response session))
 899               (error "NNTP list command failed"))
 900           (setq max-number
 901                 (nth 1 (read (concat "(" (elmo-nntp-read-contents
 902                                           session) ")"))))
 903           (setq msgdb-max (if numbers (apply #'max numbers) 0))
 904           (when (and msgdb-max
 905                      max-number
 906                      (< msgdb-max max-number))
 907             (let ((i (1+ msgdb-max))
 908                   killed)
 909               (while (<= i max-number)
 910                 (setq killed (cons i killed))
 911                 (incf i))
 912               (elmo-folder-kill-messages folder (nreverse killed)))))))))
 913
 914 (defun elmo-nntp-msgdb-create-by-header (session numbers flag-table)
 915   (with-temp-buffer
 916     (elmo-nntp-retrieve-headers session (current-buffer) numbers)
 917     (elmo-nntp-msgdb-create-message
 918      (length numbers) flag-table)))
 919
 920 (defun elmo-nntp-parse-xhdr-response (string)
 921   (let (response)
 922     (with-temp-buffer
 923       (insert string)
 924       (goto-char (point-min))
 925       (while (not (eobp))
 926         (if (looking-at "^\\([0-9]+\\) \\(.*\\)$")
 927             (setq response (cons (cons (string-to-int (elmo-match-buffer 1))
 928                                        (elmo-match-buffer 2))
 929                                  response)))
 930         (forward-line 1)))
 931     (nreverse response)))
 932
 933 (defun elmo-nntp-parse-overview-string (string)
 934   (save-excursion
 935     (let ((tmp-buffer (get-buffer-create " *ELMO Overview TMP*"))
 936           ret-list ret-val beg)
 937       (set-buffer tmp-buffer)
 938       (erase-buffer)
 939       (elmo-set-buffer-multibyte nil)
 940       (insert string)
 941       (goto-char (point-min))
 942       (setq beg (point))
 943       (while (not (eobp))
 944         (end-of-line)
 945         (setq ret-list (save-match-data
 946                          (apply 'vector (split-string
 947                                          (buffer-substring beg (point))
 948                                          "\t"))))
 949         (beginning-of-line)
 950         (forward-line 1)
 951         (setq beg (point))
 952         (setq ret-val (nconc ret-val (list ret-list))))
 953 ;;;   (kill-buffer tmp-buffer)
 954       ret-val)))
 955
 956 (defun elmo-nntp-get-newsgroup-by-msgid (msgid server user port type)
 957   "Get nntp header string."
 958   (save-excursion
 959     (let ((session (elmo-nntp-get-session
 960                     (luna-make-entity
 961                      'elmo-nntp-folder
 962                      :user user
 963                      :server server
 964                      :port port
 965                      :stream-type type))))
 966       (elmo-nntp-send-command session
 967                               (format "head %s" msgid))
 968       (if (elmo-nntp-read-response session)
 969           (elmo-nntp-read-contents session))
 970       (with-current-buffer (elmo-network-session-buffer session)
 971         (std11-field-body "Newsgroups")))))
 972
 973 (luna-define-method elmo-message-fetch-with-cache-process :around
 974   ((folder elmo-nntp-folder) number strategy &optional section unread)
 975   (when (luna-call-next-method)
 976     (elmo-nntp-setup-crosspost-buffer folder number)
 977     (unless unread
 978       (elmo-nntp-folder-update-crosspost-message-alist
 979        folder (list number)))
 980     t))
 981
 982 (luna-define-method elmo-message-fetch-plugged ((folder elmo-nntp-folder)
 983                                                 number strategy
 984                                                 &optional section outbuf
 985                                                 unread)
 986   (elmo-nntp-message-fetch folder number strategy section outbuf unread))
 987
 988 (defun elmo-nntp-message-fetch (folder number strategy section outbuf unread)
 989   (let ((session (elmo-nntp-get-session folder))
 990         newsgroups)
 991     (with-current-buffer (elmo-network-session-buffer session)
 992       (elmo-nntp-select-group session (elmo-nntp-folder-group-internal folder))
 993       (elmo-nntp-send-command session (format "article %s" number))
 994       (if (null (elmo-nntp-read-response session t))
 995           (progn
 996             (with-current-buffer outbuf (erase-buffer))
 997             (message "Fetching message failed")
 998             nil)
 999         (prog1 (elmo-nntp-read-body session outbuf)
1000           (with-current-buffer outbuf
1001             (goto-char (point-min))
1002             (while (re-search-forward "^\\." nil t)
1003               (replace-match "")
1004               (forward-line))
1005             (elmo-nntp-setup-crosspost-buffer folder number)
1006             (unless unread
1007               (elmo-nntp-folder-update-crosspost-message-alist
1008                folder (list number)))))))))
1009
1010 (defun elmo-nntp-post (hostname content-buf)
1011   (let ((session (elmo-nntp-get-session
1012                   (luna-make-entity
1013                    'elmo-nntp-folder
1014                    :user elmo-nntp-default-user
1015                    :server hostname
1016                    :port elmo-nntp-default-port
1017                    :stream-type
1018                    (elmo-get-network-stream-type
1019                     elmo-nntp-default-stream-type))))
1020         response has-message-id)
1021     (save-excursion
1022       (set-buffer content-buf)
1023       (goto-char (point-min))
1024       (if (search-forward mail-header-separator nil t)
1025           (delete-region (match-beginning 0)(match-end 0)))
1026       (setq has-message-id (std11-field-body "message-id"))
1027       (elmo-nntp-send-command session "post")
1028       (if (string-match "^340" (setq response
1029                                      (elmo-nntp-read-raw-response session)))
1030           (if (string-match "recommended ID \\(<[^@]+@[^>]+>\\)" response)
1031               (unless has-message-id
1032                 (goto-char (point-min))
1033                 (insert (concat "Message-ID: "
1034                                 (elmo-match-string 1 response)
1035                                 "\n"))))
1036         (error "POST failed"))
1037       (run-hooks 'elmo-nntp-post-pre-hook)
1038       (elmo-nntp-send-buffer session content-buf)
1039       (elmo-nntp-send-command session ".")
1040 ;;;   (elmo-nntp-read-response buffer process t)
1041       (if (not (string-match
1042                 "^2" (setq response (elmo-nntp-read-raw-response
1043                                      session))))
1044           (error "NNTP error: %s" response)))))
1045
1046 (defsubst elmo-nntp-send-data-line (session line)
1047   "Send LINE to SESSION."
1048   ;; Escape "." at start of a line
1049   (if (eq (string-to-char line) ?.)
1050       (process-send-string (elmo-network-session-process-internal
1051                             session) "."))
1052   (process-send-string (elmo-network-session-process-internal
1053                         session) line)
1054   (process-send-string (elmo-network-session-process-internal
1055                         session) "\r\n"))
1056
1057 (defun elmo-nntp-send-buffer (session databuf)
1058   "Send data content of DATABUF to SESSION."
1059   (let ((data-continue t)
1060         line bol)
1061     (with-current-buffer databuf
1062       (goto-char (point-min))
1063       (while data-continue
1064         (beginning-of-line)
1065         (setq bol (point))
1066         (end-of-line)
1067         (setq line (buffer-substring bol (point)))
1068         (unless (eq (forward-line 1) 0) (setq data-continue nil))
1069         (elmo-nntp-send-data-line session line)))))
1070
1071 (luna-define-method elmo-folder-delete-messages ((folder elmo-nntp-folder)
1072                                                  numbers)
1073   (elmo-folder-kill-messages folder numbers)
1074   t)
1075
1076 (luna-define-method elmo-folder-exists-p-plugged ((folder elmo-nntp-folder))
1077   (let ((session (elmo-nntp-get-session folder)))
1078     (elmo-nntp-send-command
1079      session
1080      (format "group %s"
1081              (elmo-nntp-folder-group-internal folder)))
1082     (elmo-nntp-read-response session)))
1083
1084 (defun elmo-nntp-retrieve-field (spec field from-msgs)
1085   "Retrieve FIELD values from FROM-MSGS.
1086 Returns a list of cons cells like (NUMBER . VALUE)"
1087   (let ((session (elmo-nntp-get-session spec)))
1088     (if (elmo-nntp-xhdr-p session)
1089         (progn
1090           (elmo-nntp-select-group session (elmo-nntp-folder-group-internal spec))
1091           (elmo-nntp-send-command session
1092                                   (format "xhdr %s %s"
1093                                           field
1094                                           (if from-msgs
1095                                               (format
1096                                                "%d-%d"
1097                                                (car from-msgs)
1098                                                (nth
1099                                                 (max
1100                                                  (- (length from-msgs) 1) 0)
1101                                                 from-msgs))
1102                                             "0-")))
1103           (if (elmo-nntp-read-response session t)
1104               (elmo-nntp-parse-xhdr-response
1105                (elmo-nntp-read-contents session))
1106             (elmo-nntp-set-xhdr session nil)
1107             (error "NNTP XHDR command failed"))))))
1108
1109 (defun elmo-nntp-search-primitive (spec condition &optional from-msgs)
1110   (let ((search-key (elmo-filter-key condition)))
1111     (cond
1112      ((string= "last" search-key)
1113       (let ((numbers (or from-msgs (elmo-folder-list-messages spec))))
1114         (nthcdr (max (- (length numbers)
1115                         (string-to-int (elmo-filter-value condition)))
1116                      0)
1117                 numbers)))
1118      ((string= "first" search-key)
1119       (let* ((numbers (or from-msgs (elmo-folder-list-messages spec)))
1120              (rest (nthcdr (string-to-int (elmo-filter-value condition) )
1121                            numbers)))
1122         (mapcar '(lambda (x) (delete x numbers)) rest)
1123         numbers))
1124      ((or (string= "since" search-key)
1125           (string= "before" search-key))
1126       (let* ((specified-date (elmo-date-make-sortable-string
1127                               (elmo-date-get-datevec (elmo-filter-value
1128                                                       condition))))
1129              (since (string= "since" search-key))
1130              field-date  result)
1131         (if (eq (elmo-filter-type condition) 'unmatch)
1132             (setq since (not since)))
1133         (setq result
1134               (delq nil
1135                     (mapcar
1136                      (lambda (pair)
1137                        (setq field-date
1138                              (elmo-date-make-sortable-string
1139                               (timezone-fix-time
1140                                (cdr pair)
1141                                (current-time-zone) nil)))
1142                        (if (if since
1143                                (or (string= specified-date field-date)
1144                                    (string< specified-date field-date))
1145                              (string< field-date
1146                                       specified-date))
1147                            (car pair)))
1148                      (elmo-nntp-retrieve-field spec "date" from-msgs))))
1149         (if from-msgs
1150             (elmo-list-filter from-msgs result)
1151           result)))
1152      ((string= "body" search-key)
1153       nil)
1154      (t
1155       (let ((val (elmo-filter-value condition))
1156             (negative (eq (elmo-filter-type condition) 'unmatch))
1157             (case-fold-search t)
1158             result)
1159         (setq result
1160               (delq nil
1161                     (mapcar
1162                      (lambda (pair)
1163                        (if (string-match val
1164                                          (eword-decode-string
1165                                           (decode-mime-charset-string
1166                                            (cdr pair) elmo-mime-charset)))
1167                            (unless negative (car pair))
1168                          (if negative (car pair))))
1169                      (elmo-nntp-retrieve-field spec search-key
1170                                                from-msgs))))
1171         (if from-msgs
1172             (elmo-list-filter from-msgs result)
1173           result))))))
1174
1175 (defun elmo-nntp-search-internal (folder condition from-msgs)
1176   (let (result)
1177     (cond
1178      ((vectorp condition)
1179       (setq result (elmo-nntp-search-primitive
1180                     folder condition from-msgs)))
1181      ((eq (car condition) 'and)
1182       (setq result (elmo-nntp-search-internal folder
1183                                               (nth 1 condition)
1184                                               from-msgs)
1185             result (elmo-list-filter result
1186                                      (elmo-nntp-search-internal
1187                                       folder (nth 2 condition)
1188                                       from-msgs))))
1189      ((eq (car condition) 'or)
1190       (setq result (elmo-nntp-search-internal folder
1191                                               (nth 1 condition)
1192                                               from-msgs)
1193             result (elmo-uniq-list
1194                     (nconc result
1195                            (elmo-nntp-search-internal folder
1196                                                       (nth 2 condition)
1197                                                       from-msgs)))
1198             result (sort result '<))))))
1199
1200 (luna-define-method elmo-folder-search :around ((folder elmo-nntp-folder)
1201                                                 condition &optional from-msgs)
1202   (if (and (elmo-folder-plugged-p folder)
1203            (not (string= "body" (elmo-filter-key condition))))
1204       (elmo-nntp-search-internal folder condition from-msgs)
1205     (luna-call-next-method)))
1206
1207 (defun elmo-nntp-get-folders-info-prepare (folder session-keys)
1208   (condition-case ()
1209       (let ((session (elmo-nntp-get-session folder))
1210             key count)
1211         (with-current-buffer (elmo-network-session-buffer session)
1212           (unless (setq key (assoc session session-keys))
1213             (erase-buffer)
1214             (setq key (cons session
1215                             (vector 0
1216                                     (elmo-net-folder-server-internal folder)
1217                                     (elmo-net-folder-user-internal folder)
1218                                     (elmo-net-folder-port-internal folder)
1219                                     (elmo-net-folder-stream-type-internal
1220                                      folder))))
1221             (setq session-keys (nconc session-keys (list key))))
1222           (elmo-nntp-send-command session
1223                                   (format "group %s"
1224                                           (elmo-nntp-folder-group-internal
1225                                            folder))
1226                                   'noerase)
1227           (if elmo-nntp-get-folders-securely
1228               (accept-process-output
1229                (elmo-network-session-process-internal session)
1230                1))
1231           (setq count (aref (cdr key) 0))
1232           (aset (cdr key) 0 (1+ count))))
1233     (error
1234      (when elmo-auto-change-plugged
1235        (sit-for 1))
1236      nil))
1237   session-keys)
1238
1239 (defun elmo-nntp-get-folders-info (session-keys)
1240   (let ((sessions session-keys)
1241         (cur (get-buffer-create " *ELMO NNTP Temp*")))
1242     (while sessions
1243       (let* ((session (caar sessions))
1244              (key     (cdar sessions))
1245              (count   (aref key 0))
1246              (server  (aref key 1))
1247              (user    (aref key 2))
1248              (port    (aref key 3))
1249              (type    (aref key 4))
1250              (hashtb (or elmo-newsgroups-hashtb
1251                          (setq elmo-newsgroups-hashtb
1252                                (elmo-make-hash count)))))
1253         (save-excursion
1254           (elmo-nntp-groups-read-response session cur count)
1255           (set-buffer cur)
1256           (goto-char (point-min))
1257           (let ((case-replace nil)
1258                 (postfix (elmo-nntp-folder-postfix user server port type)))
1259             (if (not (string= postfix ""))
1260                 (save-excursion
1261                   (while (re-search-forward "^\\(211 [0-9]+ [0-9]+ [0-9]+ [^ \n]+\\)\\(.*\\)$" nil t)
1262                     (replace-match (concat (match-string 1)
1263                                            (elmo-replace-in-string
1264                                             postfix
1265                                             "\\\\" "\\\\\\\\\\\\\\\\")))))))
1266           (let (len min max group)
1267             (while (not (eobp))
1268               (condition-case ()
1269                   (when (= (following-char) ?2)
1270                     (read cur)
1271                     (setq len (read cur)
1272                           min (read cur)
1273                           max (read cur))
1274                     (set (setq group (let ((obarray hashtb)) (read cur)))
1275                          (list len min max)))
1276                 (error (and group (symbolp group) (set group nil))))
1277               (forward-line 1))))
1278         (setq sessions (cdr sessions))))
1279     (kill-buffer cur)))
1280
1281 ;; original is 'nntp-retrieve-groups [Gnus]
1282 (defun elmo-nntp-groups-read-response (session outbuf count)
1283   (let* ((received 0)
1284          (last-point (point-min)))
1285     (with-current-buffer (elmo-network-session-buffer session)
1286       (accept-process-output
1287        (elmo-network-session-process-internal session) 1)
1288       (discard-input)
1289       ;; Wait for all replies.
1290       (message "Getting folders info...")
1291       (while (progn
1292                (goto-char last-point)
1293                ;; Count replies.
1294                (while (re-search-forward "^[0-9]" nil t)
1295                  (setq received
1296                        (1+ received)))
1297                (setq last-point (point))
1298                (< received count))
1299         (accept-process-output (elmo-network-session-process-internal session)
1300                                1)
1301         (discard-input)
1302         (when (> count elmo-display-progress-threshold)
1303           (if (or (zerop (% received 10)) (= received count))
1304               (elmo-display-progress
1305                'elmo-nntp-groups-read-response "Getting folders info..."
1306                (/ (* received 100) count)))))
1307       (when (> count elmo-display-progress-threshold)
1308         (elmo-display-progress
1309          'elmo-nntp-groups-read-response "Getting folders info..." 100))
1310       ;; Wait for the reply from the final command.
1311       (goto-char (point-max))
1312       (re-search-backward "^[0-9]" nil t)
1313       (when (looking-at "^[23]")
1314         (while (progn
1315                  (goto-char (point-max))
1316                  (not (re-search-backward "\r?\n" (- (point) 3) t)))
1317           (accept-process-output
1318            (elmo-network-session-process-internal session) 1)
1319           (discard-input)))
1320       ;; Now all replies are received.  We remove CRs.
1321       (goto-char (point-min))
1322       (while (search-forward "\r" nil t)
1323         (replace-match "" t t))
1324       (copy-to-buffer outbuf (point-min) (point-max)))))
1325
1326 ;; from nntp.el [Gnus]
1327
1328 (defsubst elmo-nntp-next-result-arrived-p ()
1329   (cond
1330    ((eq (following-char) ?2)
1331     (if (re-search-forward "\n\\.\r?\n" nil t)
1332         t
1333       nil))
1334    ((looking-at "[34]")
1335     (if (search-forward "\n" nil t)
1336         t
1337       nil))
1338    (t
1339     nil)))
1340
1341 (defun elmo-nntp-retrieve-headers (session outbuf articles)
1342   "Retrieve the headers of ARTICLES."
1343   (with-current-buffer (elmo-network-session-buffer session)
1344     (erase-buffer)
1345     (let ((number (length articles))
1346           (count 0)
1347           (received 0)
1348           (last-point (point-min))
1349           article)
1350       ;; Send HEAD commands.
1351       (while (setq article (pop articles))
1352         (elmo-nntp-send-command session
1353                                 (format "head %s" article)
1354                                 'noerase)
1355         (setq count (1+ count))
1356         ;; Every 200 requests we have to read the stream in
1357         ;; order to avoid deadlocks.
1358         (when (or (null articles)       ;All requests have been sent.
1359                   (zerop (% count elmo-nntp-header-fetch-chop-length)))
1360           (accept-process-output
1361            (elmo-network-session-process-internal session) 1)
1362           (discard-input)
1363           (while (progn
1364                    (goto-char last-point)
1365                    ;; Count replies.
1366                    (while (elmo-nntp-next-result-arrived-p)
1367                      (setq last-point (point))
1368                      (setq received (1+ received)))
1369                    (< received count))
1370             (when (> number elmo-display-progress-threshold)
1371               (if (or (zerop (% received 20)) (= received number))
1372                   (elmo-display-progress
1373                    'elmo-nntp-retrieve-headers "Getting headers..."
1374                    (/ (* received 100) number))))
1375             (accept-process-output
1376              (elmo-network-session-process-internal session) 1)
1377             (discard-input))))
1378       (when (> number elmo-display-progress-threshold)
1379         (elmo-display-progress
1380          'elmo-nntp-retrieve-headers "Getting headers..." 100))
1381       (message "Getting headers...done")
1382       ;; Replace all CRLF with LF.
1383       (elmo-delete-cr-buffer)
1384       (copy-to-buffer outbuf (point-min) (point-max)))))
1385
1386 ;; end of from Gnus
1387
1388 (defun elmo-nntp-msgdb-create-message (len flag-table)
1389   (save-excursion
1390     (let ((new-msgdb (elmo-make-msgdb))
1391           beg entity i num message-id)
1392       (elmo-set-buffer-multibyte nil)
1393       (goto-char (point-min))
1394       (setq i 0)
1395       (message "Creating msgdb...")
1396       (while (not (eobp))
1397         (setq beg (save-excursion (forward-line 1) (point)))
1398         (setq num
1399               (and (looking-at "^2[0-9]*[ ]+\\([0-9]+\\)")
1400                    (string-to-int
1401                     (elmo-match-buffer 1))))
1402         (elmo-nntp-next-result-arrived-p)
1403         (when num
1404           (save-excursion
1405             (forward-line -1)
1406             (save-restriction
1407               (narrow-to-region beg (point))
1408               (setq entity
1409                     (elmo-msgdb-create-message-entity-from-buffer
1410                      (elmo-msgdb-message-entity-handler new-msgdb) num))
1411               (when entity
1412                 (setq message-id
1413                       (elmo-message-entity-field entity 'message-id))
1414                 (elmo-msgdb-append-entity
1415                  new-msgdb
1416                  entity
1417                  (elmo-flag-table-get flag-table message-id))))))
1418         (when (> len elmo-display-progress-threshold)
1419           (setq i (1+ i))
1420           (if (or (zerop (% i 20)) (= i len))
1421               (elmo-display-progress
1422                'elmo-nntp-msgdb-create-message "Creating msgdb..."
1423                (/ (* i 100) len)))))
1424       (when (> len elmo-display-progress-threshold)
1425         (elmo-display-progress
1426          'elmo-nntp-msgdb-create-message "Creating msgdb..." 100))
1427       new-msgdb)))
1428
1429 (luna-define-method elmo-message-use-cache-p ((folder elmo-nntp-folder) number)
1430   elmo-nntp-use-cache)
1431
1432 (defun elmo-nntp-parse-newsgroups (string &optional subscribe-only)
1433   (let ((nglist (elmo-parse string "[ \t\f\r\n,]*\\([^ \t\f\r\n,]+\\)"))
1434         ngs)
1435     (if (not subscribe-only)
1436         nglist
1437       (dolist (ng nglist)
1438         (if (intern-soft ng elmo-newsgroups-hashtb)
1439             (setq ngs (cons ng ngs))))
1440       ngs)))
1441
1442 ;;; Crosspost processing.
1443
1444 ;; 1. setup crosspost alist.
1445 ;;    1.1. When message is fetched and is crossposted message,
1446 ;;         it is remembered in `temp-crosses' slot.
1447 ;;         temp-crosses slot is a list of cons cell:
1448 ;;         (NUMBER . (MESSAGE-ID (LIST-OF-NEWSGROUPS) 'ng))
1449 ;;    1.2. In elmo-folder-close, `temp-crosses' slot is cleared,
1450 ;;    1.3. In elmo-folder-flag-as-read, move crosspost entry
1451 ;;         from `temp-crosses' slot to `elmo-crosspost-message-alist'.
1452
1453 ;; 2. process crosspost alist.
1454 ;;    2.1. At elmo-folder-process-crosspost, setup `reads' slot from
1455 ;;         `elmo-crosspost-message-alist'.
1456 ;;    2.2. remove crosspost entry for current newsgroup from
1457 ;;         `elmo-crosspost-message-alist'.
1458 ;;    2.3. elmo-folder-list-unreads return unread message list according to
1459 ;;         `reads' slot.
1460 ;;         (There's a problem that if `elmo-folder-list-unreads'
1461 ;;           never executed, crosspost information is thrown away.)
1462 ;;    2.4. In elmo-folder-close, `read' slot is cleared,
1463
1464 (defun elmo-nntp-setup-crosspost-buffer (folder number)
1465 ;;    1.1. When message is fetched and is crossposted message,
1466 ;;         it is remembered in `temp-crosses' slot.
1467 ;;         temp-crosses slot is a list of cons cell:
1468 ;;         (NUMBER . (MESSAGE-ID (LIST-OF-NEWSGROUPS) 'ng))
1469   (let (newsgroups crosspost-newsgroups message-id)
1470     (save-restriction
1471       (std11-narrow-to-header)
1472       (setq newsgroups (std11-fetch-field "newsgroups")
1473             message-id (std11-msg-id-string
1474                         (car (std11-parse-msg-id-string
1475                               (std11-fetch-field "message-id"))))))
1476     (when newsgroups
1477       (when (setq crosspost-newsgroups
1478                   (delete
1479                    (elmo-nntp-folder-group-internal folder)
1480                    (elmo-nntp-parse-newsgroups newsgroups t)))
1481         (unless (assq number
1482                       (elmo-nntp-folder-temp-crosses-internal folder))
1483           (elmo-nntp-folder-set-temp-crosses-internal
1484            folder
1485            (cons (cons number (list message-id crosspost-newsgroups 'ng))
1486                  (elmo-nntp-folder-temp-crosses-internal folder))))))))
1487
1488 (luna-define-method elmo-folder-close-internal ((folder elmo-nntp-folder))
1489 ;;    1.2. In elmo-folder-close, `temp-crosses' slot is cleared,
1490   (elmo-nntp-folder-set-temp-crosses-internal folder nil)
1491   (elmo-nntp-folder-set-reads-internal folder nil)
1492   )
1493
1494 (defun elmo-nntp-folder-update-crosspost-message-alist (folder numbers)
1495 ;;    1.3. In elmo-folder-flag-as-read, move crosspost entry
1496 ;;         from `temp-crosses' slot to `elmo-crosspost-message-alist'.
1497   (let (elem)
1498     (dolist (number numbers)
1499       (when (setq elem (assq number
1500                              (elmo-nntp-folder-temp-crosses-internal folder)))
1501         (unless (assoc (cdr (cdr elem)) elmo-crosspost-message-alist)
1502           (setq elmo-crosspost-message-alist
1503                 (cons (cdr elem) elmo-crosspost-message-alist)))
1504         (elmo-nntp-folder-set-temp-crosses-internal
1505          folder
1506          (delq elem (elmo-nntp-folder-temp-crosses-internal folder)))))))
1507
1508 (luna-define-method elmo-folder-set-flag :before ((folder elmo-nntp-folder)
1509                                                   numbers
1510                                                   flag
1511                                                   &optional is-local)
1512   (when (eq flag 'read)
1513     (elmo-nntp-folder-update-crosspost-message-alist folder numbers)))
1514
1515 (luna-define-method elmo-folder-unset-flag :before ((folder elmo-nntp-folder)
1516                                                     numbers
1517                                                     flag
1518                                                     &optional is-local)
1519   (when (eq flag 'unread)
1520     (elmo-nntp-folder-update-crosspost-message-alist folder numbers)))
1521
1522 (defsubst elmo-nntp-folder-process-crosspost (folder)
1523 ;;    2.1. At elmo-folder-process-crosspost, setup `reads' slot from
1524 ;;         `elmo-crosspost-message-alist'.
1525 ;;    2.2. remove crosspost entry for current newsgroup from
1526 ;;         `elmo-crosspost-message-alist'.
1527   (let (cross-deletes reads entity ngs)
1528     (dolist (cross elmo-crosspost-message-alist)
1529       (when (setq entity (elmo-message-entity folder (nth 0 cross)))
1530         (setq reads (cons (elmo-message-entity-number entity) reads)))
1531       (when entity
1532         (if (setq ngs (delete (elmo-nntp-folder-group-internal folder)
1533                               (nth 1 cross)))
1534             (setcar (cdr cross) ngs)
1535           (setq cross-deletes (cons cross cross-deletes)))
1536         (setq elmo-crosspost-message-alist-modified t)))
1537     (dolist (dele cross-deletes)
1538       (setq elmo-crosspost-message-alist (delq
1539                                           dele
1540                                           elmo-crosspost-message-alist)))
1541     (elmo-nntp-folder-set-reads-internal folder reads)))
1542
1543 (luna-define-method elmo-folder-process-crosspost ((folder elmo-nntp-folder))
1544   (elmo-nntp-folder-process-crosspost folder))
1545
1546 (luna-define-method elmo-folder-list-flagged :around ((folder elmo-nntp-folder)
1547                                                       flag &optional in-msgdb)
1548   ;;    2.3. elmo-folder-list-unreads return unread message list according to
1549   ;;         `reads' slot.
1550   (let ((msgs (luna-call-next-method)))
1551     (if in-msgdb
1552         msgs
1553       (case flag
1554         (unread
1555          (elmo-living-messages msgs (elmo-nntp-folder-reads-internal folder)))
1556         ;; Should consider read, digest and any flag?
1557         (otherwise
1558          msgs)))))
1559
1560 (require 'product)
1561 (product-provide (provide 'elmo-nntp) (require 'elmo-version))
1562
1563 ;;; elmo-nntp.el ends here