elmo/elmo-imap4.el

   1 ;;; elmo-imap4.el --- IMAP4 Interface for ELMO.
   2
   3 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
   4 ;; Copyright (C) 1999,2000      Kenichi OKADA <okada@opaopa.org>
   5 ;; Copyright (C) 2000           OKAZAKI Tetsurou <okazaki@be.to>
   6 ;; Copyright (C) 2000           Daiki Ueno <ueno@unixuser.org>
   7
   8 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   9 ;;      Kenichi OKADA <okada@opaopa.org>
  10 ;;      OKAZAKI Tetsurou <okazaki@be.to>
  11 ;;      Daiki Ueno <ueno@unixuser.org>
  12 ;; Keywords: mail, net news
  13
  14 ;; This file is part of ELMO (Elisp Library for Message Orchestration).
  15
  16 ;; This program is free software; you can redistribute it and/or modify
  17 ;; it under the terms of the GNU General Public License as published by
  18 ;; the Free Software Foundation; either version 2, or (at your option)
  19 ;; any later version.
  20 ;;
  21 ;; This program is distributed in the hope that it will be useful,
  22 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 ;; GNU General Public License for more details.
  25 ;;
  26 ;; You should have received a copy of the GNU General Public License
  27 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  28 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  29 ;; Boston, MA 02111-1307, USA.
  30 ;;
  31
  32 ;;; Commentary:
  33 ;;
  34 ;; Origin of IMAP parser part is imap.el, included in Gnus.
  35 ;;
  36 ;;    Copyright (C) 1998, 1999, 2000
  37 ;;    Free Software Foundation, Inc.
  38 ;;    Author: Simon Josefsson <jas@pdc.kth.se>
  39 ;;
  40
  41 ;;; Code:
  42 (require 'elmo-vars)
  43 (require 'elmo-util)
  44 (require 'elmo-date)
  45 (require 'elmo-msgdb)
  46 (require 'elmo-cache)
  47 (require 'elmo)
  48 (require 'elmo-net)
  49 (require 'utf7)
  50 (require 'elmo-mime)
  51 (require 'time-stamp)
  52
  53 (eval-when-compile (require 'cl))
  54
  55 (defvar elmo-imap4-disuse-server-flag-mailbox-regexp "^#mh" ; UW imapd
  56   "Regexp to match IMAP4 mailbox names whose message flags on server should be ignored (For STATUS command).")
  57
  58 (defvar elmo-imap4-overview-fetch-chop-length 200
  59   "*Number of overviews to fetch in one request.")
  60
  61 ;; c.f. rfc2683 3.2.1.5 Long Command Lines
  62 ;;
  63 ;; "A client should limit the length of the command lines it generates
  64 ;;  to approximately 1000 octets (including all quoted strings but not
  65 ;;  including literals). If the client is unable to group things into
  66 ;;  ranges so that the command line is within that length, it should
  67 ;;  split the request into multiple commands. The client should use
  68 ;;  literals instead of long quoted strings, in order to keep the command
  69 ;;  length down.
  70 ;;  For its part, a server should allow for a command line of at least
  71 ;;  8000 octets. This provides plenty of leeway for accepting reasonable
  72 ;;  length commands from clients. The server should send a BAD response
  73 ;;  to a command that does not end within the server's maximum accepted
  74 ;;  command length. "
  75
  76 ;; To limit command line length, chop number set.
  77 (defvar elmo-imap4-number-set-chop-length 1000
  78   "*Number of messages to specify as a number-set argument for one request.")
  79
  80 (defvar elmo-imap4-force-login nil
  81   "*Non-nil forces to try 'login' if there is no 'auth' capability in imapd.")
  82
  83 (defvar elmo-imap4-use-select-to-update-status nil
  84   "*Some imapd have to send select command to update status.
  85 \(ex. UW imapd 4.5-BETA?\).  For these imapd, you must set this variable t.")
  86
  87 (defvar elmo-imap4-use-modified-utf7 nil
  88   "*Use mofidied UTF-7 (rfc2060) encoding for IMAP4 folder name.")
  89
  90 (defvar elmo-imap4-use-cache t
  91   "Use cache in imap4 folder.")
  92
  93 (defvar elmo-imap4-extra-namespace-alist
  94   '(("^\\({.*/nntp}\\).*$" . ".")) ; Default is for UW's remote nntp mailbox...
  95   "Extra namespace alist.
  96 A list of cons cell like: (REGEXP . DELIMITER).
  97 REGEXP should have a grouping for namespace prefix.")
  98
  99 (defvar elmo-imap4-disabled-extensions nil
 100   "List of server extensions that are disabled on the client side.")
 101
 102 ;;
 103 ;;; internal variables
 104 ;;
 105 (defvar elmo-imap4-seq-prefix "elmo-imap4")
 106 (defvar elmo-imap4-seqno 0)
 107 (defvar elmo-imap4-use-uid t
 108   "Use UID as message number.")
 109
 110 (defvar elmo-imap4-current-response nil)
 111 (defvar elmo-imap4-status nil)
 112 (defvar elmo-imap4-reached-tag "elmo-imap40")
 113
 114 ;;; buffer local variables
 115 (defvar elmo-imap4-default-hierarchy-delimiter "/")
 116
 117 (defvar elmo-imap4-server-capability nil)
 118 (defvar elmo-imap4-server-namespace nil)
 119
 120 (defvar elmo-imap4-parsing nil) ; indicates parsing.
 121
 122 (defvar elmo-imap4-fetch-callback nil)
 123 (defvar elmo-imap4-fetch-callback-data nil)
 124 (defvar elmo-imap4-status-callback nil)
 125 (defvar elmo-imap4-status-callback-data nil)
 126
 127 (defvar elmo-imap4-server-diff-async-callback nil)
 128 (defvar elmo-imap4-server-diff-async-callback-data nil)
 129
 130 ;;; progress...(no use?)
 131 (defvar elmo-imap4-count-progress nil)
 132 (defvar elmo-imap4-count-progress-message nil)
 133 (defvar elmo-imap4-progress-count nil)
 134
 135 ;;; XXX Temporal implementation
 136 (defvar elmo-imap4-current-msgdb nil)
 137 (defvar elmo-imap4-seen-messages nil)
 138
 139 (defvar elmo-imap4-local-variables
 140   '(elmo-imap4-status
 141     elmo-imap4-current-response
 142     elmo-imap4-seqno
 143     elmo-imap4-parsing
 144     elmo-imap4-reached-tag
 145     elmo-imap4-count-progress
 146     elmo-imap4-count-progress-message
 147     elmo-imap4-progress-count
 148     elmo-imap4-fetch-callback
 149     elmo-imap4-fetch-callback-data
 150     elmo-imap4-status-callback
 151     elmo-imap4-status-callback-data
 152     elmo-imap4-current-msgdb
 153     elmo-imap4-seen-messages))
 154
 155 ;;;;
 156
 157 (defconst elmo-imap4-quoted-specials-list '(?\\ ?\"))
 158
 159 (defconst elmo-imap4-non-atom-char-regex
 160   (eval-when-compile
 161     (concat "[^" "]!#$&'+,./0-9:;<=>?@A-Z[^_`a-z|}~-" "]")))
 162
 163 (defconst elmo-imap4-non-text-char-regex
 164   (eval-when-compile
 165     (concat "[^"
 166             "]\x01-\x09\x0b\x0c\x0e-\x1f\x7f !\"#$%&'()*+,./0-9:;<=>?@A-Z[\\^_`a-z{|}~-"
 167             "]")))
 168
 169 (defconst elmo-imap4-literal-threshold 1024
 170  "Limitation of characters that can be used in a quoted string.")
 171
 172 (defconst elmo-imap4-flag-specs '((important "\\Flagged")
 173                                   (read "\\Seen")
 174                                   (unread "\\Seen" 'remove)
 175                                   (answered "\\Answered")
 176                                   ;; draft-melnikov-imap-keywords-03.txt
 177                                   (forwarded "$Forwarded")
 178                                   (work "$Work")
 179                                   (personal "$Personal")
 180                                   (shouldreply "$ShouldReply")))
 181
 182 (defconst elmo-imap4-folder-name-syntax
 183   `(mailbox
 184     (?: [user "^[A-Za-z]"] (?/ [auth ".+"]))
 185     ,@elmo-net-folder-name-syntax))
 186
 187 ;; For debugging.
 188 (defvar elmo-imap4-debug nil
 189   "Non-nil forces IMAP4 folder as debug mode.
 190 Debug information is inserted in the buffer \"*IMAP4 DEBUG*\"")
 191
 192 (defvar elmo-imap4-debug-inhibit-logging nil)
 193
 194 ;;; ELMO IMAP4 folder
 195 (eval-and-compile
 196   (luna-define-class elmo-imap4-folder (elmo-net-folder)
 197                      (mailbox))
 198   (luna-define-internal-accessors 'elmo-imap4-folder))
 199
 200 ;;; Session
 201 (eval-and-compile
 202   (luna-define-class elmo-imap4-session (elmo-network-session)
 203                      (capability current-mailbox read-only flags))
 204   (luna-define-internal-accessors 'elmo-imap4-session))
 205
 206 (defmacro elmo-imap4-session-capable-p (session capability)
 207   `(and (memq ,capability (elmo-imap4-session-capability-internal ,session))
 208         (not (memq ,capability elmo-imap4-disabled-extensions))))
 209
 210 ;;; MIME-ELMO-IMAP Location
 211 (eval-and-compile
 212   (luna-define-class mime-elmo-imap-location
 213                      (mime-imap-location)
 214                      (folder number rawbuf strategy))
 215   (luna-define-internal-accessors 'mime-elmo-imap-location))
 216
 217 ;;; Debug
 218 (defmacro elmo-imap4-debug (message &rest args)
 219   `(if elmo-imap4-debug
 220        (elmo-imap4-debug-1 ,message ,@args)))
 221
 222 (defun elmo-imap4-debug-1 (message &rest args)
 223   (with-current-buffer (get-buffer-create "*IMAP4 DEBUG*")
 224     (goto-char (point-max))
 225     (if elmo-imap4-debug-inhibit-logging
 226         (insert "NO LOGGING\n")
 227       (insert (apply 'format message args) "\n"))))
 228
 229 (defsubst elmo-imap4-decode-folder-string (string)
 230   (if elmo-imap4-use-modified-utf7
 231       (utf7-decode string 'imap)
 232     string))
 233
 234 (defsubst elmo-imap4-encode-folder-string (string)
 235   (if elmo-imap4-use-modified-utf7
 236       (utf7-encode string 'imap)
 237     string))
 238
 239 ;;; Response
 240
 241 (defmacro elmo-imap4-response-continue-req-p (response)
 242   "Returns non-nil if RESPONSE is '+' response."
 243   `(assq 'continue-req ,response))
 244
 245 (defmacro elmo-imap4-response-ok-p (response)
 246   "Returns non-nil if RESPONSE is an 'OK' response."
 247   `(assq 'ok ,response))
 248
 249 (defmacro elmo-imap4-response-bye-p (response)
 250   "Returns non-nil if RESPONSE is an 'BYE' response."
 251   `(assq 'bye ,response))
 252
 253 (defmacro elmo-imap4-response-garbage-p (response)
 254   "Returns non-nil if RESPONSE is an 'garbage' response."
 255   `(assq 'garbage ,response))
 256
 257 (defmacro elmo-imap4-response-value (response symbol)
 258   "Get value of the SYMBOL from RESPONSE."
 259   `(nth 1 (assq ,symbol ,response)))
 260
 261 (defsubst elmo-imap4-response-value-all (response symbol)
 262   "Get all value of the SYMBOL from RESPONSE."
 263   (let (matched)
 264     (while response
 265       (if (eq (car (car response)) symbol)
 266           (setq matched (nconc matched (nth 1 (car response)))))
 267       (setq response (cdr response)))
 268     matched))
 269
 270 (defmacro elmo-imap4-response-error-text (response)
 271   "Returns text of NO, BAD, BYE response."
 272   `(nth 1 (or (elmo-imap4-response-value ,response 'no)
 273               (elmo-imap4-response-value ,response 'bad)
 274               (elmo-imap4-response-value ,response 'bye))))
 275
 276 (defmacro elmo-imap4-response-bodydetail-text (response)
 277   "Returns text of BODY[section]<partial>."
 278   `(nth 3 (assq 'bodydetail ,response)))
 279
 280 ;;; Session commands.
 281
 282 ;;;(defun elmo-imap4-send-command-wait (session command)
 283 ;;;  "Send COMMAND to the SESSION and wait for response.
 284 ;;;Returns RESPONSE (parsed lisp object) of IMAP session."
 285 ;;;  (elmo-imap4-read-response session
 286 ;;;                         (elmo-imap4-send-command
 287 ;;;                          session
 288 ;;;                          command)))
 289
 290 (defun elmo-imap4-send-command-wait (session command)
 291   "Send COMMAND to the SESSION.
 292 Returns RESPONSE (parsed lisp object) of IMAP session.
 293 If response is not `OK', causes error with IMAP response text."
 294   (elmo-imap4-accept-ok session
 295                         (elmo-imap4-send-command
 296                          session
 297                          command)))
 298
 299 (defun elmo-imap4-send-command (session command)
 300   "Send COMMAND to the SESSION.
 301 Returns a TAG string which is assigned to the COMMAND."
 302   (let* ((command-args (if (listp command)
 303                            command
 304                          (list command)))
 305          (process (elmo-network-session-process-internal session))
 306          cmdstr tag token kind)
 307     (with-current-buffer (process-buffer process)
 308       (setq tag (concat elmo-imap4-seq-prefix
 309                         (number-to-string
 310                          (setq elmo-imap4-seqno (+ 1 elmo-imap4-seqno)))))
 311       (setq cmdstr (concat tag " "))
 312 ;;; No need.
 313 ;;;      (erase-buffer)
 314       (goto-char (point-min))
 315       (when (elmo-imap4-response-bye-p elmo-imap4-current-response)
 316         (elmo-imap4-process-bye session))
 317       (setq elmo-imap4-current-response nil)
 318       (when elmo-imap4-parsing
 319         (message "Waiting for IMAP response...")
 320         (accept-process-output (elmo-network-session-process-internal
 321                                 session))
 322         (message "Waiting for IMAP response...done"))
 323       (setq elmo-imap4-parsing t)
 324       (while (setq token (car command-args))
 325         (cond ((stringp token)   ; formatted
 326                (setq cmdstr (concat cmdstr token)))
 327               ((listp token)     ; unformatted
 328                (setq kind (car token))
 329                (cond ((eq kind 'atom)
 330                       (setq cmdstr (concat cmdstr (nth 1 token))))
 331                      ((eq kind 'quoted)
 332                       (setq cmdstr (concat
 333                                     cmdstr
 334                                     (elmo-imap4-format-quoted (nth 1 token)))))
 335                      ((eq kind 'literal)
 336                       (if (elmo-imap4-session-capable-p session 'literal+)
 337                           ;; rfc2088
 338                           (progn
 339                             (setq cmdstr (concat cmdstr
 340                                                  (format "{%d+}" (nth 2 token))
 341                                                  "\r\n"))
 342                             (process-send-string process cmdstr)
 343                             (setq cmdstr nil))
 344                         (setq cmdstr (concat cmdstr
 345                                              (format "{%d}" (nth 2 token))
 346                                              "\r\n"))
 347                         (process-send-string process cmdstr)
 348                         (setq cmdstr nil)
 349                         (elmo-imap4-accept-continue-req session))
 350                       (cond ((stringp (nth 1 token))
 351                              (setq cmdstr (nth 1 token)))
 352                             ((bufferp (nth 1 token))
 353                              (with-current-buffer (nth 1 token)
 354                                (process-send-region
 355                                 process
 356                                 (point-min)
 357                                 (+ (point-min) (nth 2 token)))))
 358                             (t
 359                              (error "Wrong argument for literal"))))
 360                      (t
 361                       (error "Unknown token kind %s" kind))))
 362               (t
 363                (error "Invalid argument")))
 364         (setq command-args (cdr command-args)))
 365       (elmo-imap4-debug "[%s] <- %s" (format-time-string "%T") cmdstr)
 366       (process-send-string process (concat cmdstr "\r\n"))
 367       tag)))
 368
 369 (defun elmo-imap4-send-string (session string)
 370   "Send STRING to the SESSION."
 371   (with-current-buffer (process-buffer
 372                         (elmo-network-session-process-internal session))
 373     (setq elmo-imap4-current-response nil)
 374     (goto-char (point-min))
 375     (elmo-imap4-debug "[%s] <-- %s" (format-time-string "%T") string)
 376     (process-send-string (elmo-network-session-process-internal session)
 377                          string)
 378     (process-send-string (elmo-network-session-process-internal session)
 379                          "\r\n")))
 380
 381 (defun elmo-imap4-read-response (session tag)
 382   "Read parsed response from SESSION.
 383 TAG is the tag of the command"
 384   (with-current-buffer (process-buffer
 385                         (elmo-network-session-process-internal session))
 386     (while (not (or (string= tag elmo-imap4-reached-tag)
 387                     (elmo-imap4-response-bye-p elmo-imap4-current-response)
 388                     (when (elmo-imap4-response-garbage-p
 389                            elmo-imap4-current-response)
 390                       (message "Garbage response: %s"
 391                                (elmo-imap4-response-value
 392                                 elmo-imap4-current-response
 393                                 'garbage))
 394                       t)))
 395       (when (memq (process-status
 396                    (elmo-network-session-process-internal session))
 397                   '(open run))
 398         (accept-process-output (elmo-network-session-process-internal session)
 399                                1)))
 400     (elmo-imap4-debug "[%s] => %s" (format-time-string "%T") (prin1-to-string elmo-imap4-current-response))
 401     (setq elmo-imap4-parsing nil)
 402     elmo-imap4-current-response))
 403
 404 (defsubst elmo-imap4-read-untagged (process)
 405   (with-current-buffer (process-buffer process)
 406     (while (not elmo-imap4-current-response)
 407       (accept-process-output process 1))
 408     (elmo-imap4-debug "[%s] =>%s" (format-time-string "%T") (prin1-to-string elmo-imap4-current-response))
 409     elmo-imap4-current-response))
 410
 411 (defun elmo-imap4-read-continue-req (session)
 412   "Returns a text following to continue-req in SESSION.
 413 If response is not `+' response, returns nil."
 414   (elmo-imap4-response-value
 415    (elmo-imap4-read-untagged
 416     (elmo-network-session-process-internal session))
 417    'continue-req))
 418
 419 (defun elmo-imap4-process-bye (session)
 420   (with-current-buffer (elmo-network-session-buffer session)
 421     (let ((r elmo-imap4-current-response))
 422       (setq elmo-imap4-current-response nil)
 423       (elmo-network-close-session session)
 424       (signal 'elmo-imap4-bye-error
 425               (list (concat (elmo-imap4-response-error-text r))
 426                     "Try Again")))))
 427
 428 (defun elmo-imap4-accept-continue-req (session)
 429   "Returns non-nil if `+' (continue-req) response is arrived in SESSION.
 430 If response is not `+' response, cause an error."
 431   (let (response)
 432     (setq response
 433           (elmo-imap4-read-untagged
 434            (elmo-network-session-process-internal session)))
 435     (or (elmo-imap4-response-continue-req-p response)
 436         (error "IMAP error: %s"
 437                (or (elmo-imap4-response-error-text response)
 438                    "No continut-req from server.")))))
 439
 440 (defun elmo-imap4-read-ok (session tag)
 441   "Returns non-nil if `OK' response of the command with TAG is arrived
 442 in SESSION. If response is not `OK' response, returns nil."
 443   (elmo-imap4-response-ok-p
 444    (elmo-imap4-read-response session tag)))
 445
 446 (defun elmo-imap4-accept-ok (session tag)
 447   "Accept only `OK' response from SESSION.
 448 If response is not `OK' response, causes error with IMAP response text."
 449   (let ((response (elmo-imap4-read-response session tag)))
 450     (if (elmo-imap4-response-ok-p response)
 451         response
 452       (if (elmo-imap4-response-bye-p response)
 453           (elmo-imap4-process-bye session)
 454         (error "IMAP error: %s"
 455                (or (elmo-imap4-response-error-text response)
 456                    "No `OK' response from server."))))))
 457
 458 ;;; MIME-ELMO-IMAP Location
 459 (luna-define-method mime-imap-location-section-body ((location
 460                                                       mime-elmo-imap-location)
 461                                                      section)
 462   (if (and (stringp section)
 463            (string= section "HEADER"))
 464       ;; Even in the section mode, header fields should be saved to the
 465       ;; raw buffer .
 466       (with-current-buffer (mime-elmo-imap-location-rawbuf-internal location)
 467         (erase-buffer)
 468         (elmo-message-fetch
 469          (mime-elmo-imap-location-folder-internal location)
 470          (mime-elmo-imap-location-number-internal location)
 471          (mime-elmo-imap-location-strategy-internal location)
 472          'unseen
 473          section)
 474         (buffer-string))
 475     (elmo-message-fetch-string
 476      (mime-elmo-imap-location-folder-internal location)
 477      (mime-elmo-imap-location-number-internal location)
 478      (mime-elmo-imap-location-strategy-internal location)
 479      'unseen
 480      section)))
 481
 482
 483 (luna-define-method mime-imap-location-bodystructure
 484   ((location mime-elmo-imap-location))
 485   (elmo-message-fetch-bodystructure
 486    (mime-elmo-imap-location-folder-internal location)
 487    (mime-elmo-imap-location-number-internal location)
 488    (mime-elmo-imap-location-strategy-internal location)))
 489
 490 (luna-define-method mime-imap-location-fetch-entity-p
 491   ((location mime-elmo-imap-location) entity)
 492   (or (not elmo-message-displaying) ; Fetching entity to save or force display.
 493       ;; cache exists
 494       (file-exists-p
 495        (expand-file-name
 496         (mmimap-entity-section (mime-entity-node-id-internal entity))
 497         (elmo-fetch-strategy-cache-path
 498          (mime-elmo-imap-location-strategy-internal location))))
 499       ;; not too large to fetch.
 500       (> elmo-message-fetch-threshold
 501          (or (mime-imap-entity-size-internal entity) 0))))
 502
 503 ;;;
 504
 505 (defun elmo-imap4-session-check (session)
 506   (with-current-buffer (elmo-network-session-buffer session)
 507     (setq elmo-imap4-fetch-callback nil)
 508     (setq elmo-imap4-fetch-callback-data nil))
 509   (elmo-imap4-send-command session "check"))
 510
 511 (defun elmo-imap4-atom-p (string)
 512   "Return t if STRING is an atom defined in rfc2060."
 513   (if (string= string "")
 514       nil
 515     (save-match-data
 516       (not (string-match elmo-imap4-non-atom-char-regex string)))))
 517
 518 (defun elmo-imap4-quotable-p (string)
 519   "Return t if STRING can be formatted as a quoted defined in rfc2060."
 520   (save-match-data
 521     (not (string-match elmo-imap4-non-text-char-regex string))))
 522
 523 (defun elmo-imap4-nil (string)
 524   "Return a list represents the special atom \"NIL\" defined in rfc2060, \
 525 if STRING is nil.
 526 Otherwise return nil."
 527   (if (eq string nil)
 528       (list 'atom "NIL")))
 529
 530 (defun elmo-imap4-atom (string)
 531   "Return a list represents STRING as an atom defined in rfc2060.
 532 Return nil if STRING is not an atom.  See `elmo-imap4-atom-p'."
 533   (if (elmo-imap4-atom-p string)
 534       (list 'atom string)))
 535
 536 (defun elmo-imap4-quoted (string)
 537   "Return a list represents STRING as a quoted defined in rfc2060.
 538 Return nil if STRING can not be formatted as a quoted.  See `elmo-imap4-quotable-p'."
 539   (if (elmo-imap4-quotable-p string)
 540       (list 'quoted string)))
 541
 542 (defun elmo-imap4-literal-1 (string-or-buffer length)
 543   "Internal function for `elmo-imap4-literal' and `elmo-imap4-buffer-literal'.
 544 Return a list represents STRING-OR-BUFFER as a literal defined in rfc2060.
 545 STRING-OR-BUFFER must be an encoded string or a single-byte string or a single-byte buffer.
 546 LENGTH must be the number of octets for STRING-OR-BUFFER."
 547   (list 'literal string-or-buffer length))
 548
 549 (defun elmo-imap4-literal (string)
 550   "Return a list represents STRING as a literal defined in rfc2060.
 551 STRING must be an encoded or a single-byte string."
 552   (elmo-imap4-literal-1 string (length string)))
 553
 554 (defun elmo-imap4-buffer-literal (buffer)
 555   "Return a list represents BUFFER as a literal defined in rfc2060.
 556 BUFFER must be a single-byte buffer."
 557   (elmo-imap4-literal-1 buffer (with-current-buffer buffer
 558                                  (buffer-size))))
 559
 560 (defun elmo-imap4-string-1 (string length)
 561   "Internal function for `elmo-imap4-string' and `elmo-imap4-buffer-string'.
 562 Return a list represents STRING as a string defined in rfc2060.
 563 STRING must be an encoded or a single-byte string.
 564 LENGTH must be the number of octets for STRING."
 565   (or (elmo-imap4-quoted string)
 566       (elmo-imap4-literal-1 string length)))
 567
 568 (defun elmo-imap4-string (string)
 569   "Return a list represents STRING as a string defined in rfc2060.
 570 STRING must be an encoded or a single-byte string."
 571   (let ((length (length string)))
 572     (if (< elmo-imap4-literal-threshold length)
 573         (elmo-imap4-literal-1 string length)
 574       (elmo-imap4-string-1 string length))))
 575
 576 (defun elmo-imap4-buffer-string (buffer)
 577   "Return a list represents BUFFER as a string defined in rfc2060.
 578 BUFFER must be a single-byte buffer."
 579   (let ((length (with-current-buffer buffer
 580                   (buffer-size))))
 581     (if (< elmo-imap4-literal-threshold length)
 582         (elmo-imap4-literal-1 buffer length)
 583       (elmo-imap4-string-1 (with-current-buffer buffer
 584                              (buffer-string))
 585                            length))))
 586
 587 (defun elmo-imap4-astring-1 (string length)
 588   "Internal function for `elmo-imap4-astring' and `elmo-imap4-buffer-astring'.
 589 Return a list represents STRING as an astring defined in rfc2060.
 590 STRING must be an encoded or a single-byte string.
 591 LENGTH must be the number of octets for STRING."
 592   (or (elmo-imap4-atom string)
 593       (elmo-imap4-string-1 string length)))
 594
 595 (defun elmo-imap4-astring (string)
 596   "Return a list represents STRING as an astring defined in rfc2060.
 597 STRING must be an encoded or a single-byte string."
 598   (let ((length (length string)))
 599     (if (< elmo-imap4-literal-threshold length)
 600         (elmo-imap4-literal-1 string length)
 601       (elmo-imap4-astring-1 string length))))
 602
 603 (defun elmo-imap4-buffer-astring (buffer)
 604   "Return a list represents BUFFER as an astring defined in rfc2060.
 605 BUFFER must be a single-byte buffer."
 606   (let ((length (with-current-buffer buffer
 607                   (buffer-size))))
 608     (if (< elmo-imap4-literal-threshold length)
 609         (elmo-imap4-literal-1 buffer length)
 610       (elmo-imap4-astring-1 (with-current-buffer buffer
 611                               (buffer-string))
 612                             length))))
 613
 614 (defun elmo-imap4-nstring (string)
 615   "Return a list represents STRING as a nstring defined in rfc2060.
 616 STRING must be an encoded or a single-byte string."
 617    (or (elmo-imap4-nil string)
 618        (elmo-imap4-string string)))
 619
 620 (defun elmo-imap4-buffer-nstring (buffer)
 621   "Return a list represents BUFFER as a nstring defined in rfc2060.
 622 BUFFER must be a single-byte buffer."
 623    (or (elmo-imap4-nil buffer)
 624        (elmo-imap4-buffer-string buffer)))
 625
 626 (defalias 'elmo-imap4-mailbox 'elmo-imap4-astring)
 627 (defalias 'elmo-imap4-field-body 'elmo-imap4-astring)
 628 (defalias 'elmo-imap4-userid 'elmo-imap4-astring)
 629 (defalias 'elmo-imap4-password 'elmo-imap4-astring)
 630
 631 (defun elmo-imap4-format-quoted (string)
 632   "Return STRING in a form of the quoted-string defined in rfc2060."
 633   (concat "\""
 634           (std11-wrap-as-quoted-pairs string elmo-imap4-quoted-specials-list)
 635           "\""))
 636
 637 (defsubst elmo-imap4-response-get-selectable-mailbox-list (response)
 638   (delq nil
 639         (mapcar
 640          (lambda (entry)
 641            (if (and (eq 'list (car entry))
 642                     (not (elmo-string-member-ignore-case "\\Noselect" (nth 1 (nth 1 entry)))))
 643                (car (nth 1 entry))))
 644          response)))
 645
 646 (luna-define-method elmo-message-fetch-bodystructure ((folder
 647                                                        elmo-imap4-folder)
 648                                                       number strategy)
 649   (if (elmo-fetch-strategy-use-cache strategy)
 650       (elmo-object-load
 651        (elmo-file-cache-expand-path
 652         (elmo-fetch-strategy-cache-path strategy)
 653         "bodystructure"))
 654     (let ((session (elmo-imap4-get-session folder))
 655           bodystructure)
 656       (elmo-imap4-session-select-mailbox
 657        session
 658        (elmo-imap4-folder-mailbox-internal folder))
 659       (with-current-buffer (elmo-network-session-buffer session)
 660         (setq elmo-imap4-fetch-callback nil)
 661         (setq elmo-imap4-fetch-callback-data nil))
 662       (prog1 (setq bodystructure
 663                    (elmo-imap4-response-value
 664                     (elmo-imap4-response-value
 665                      (elmo-imap4-send-command-wait
 666                       session
 667                       (format
 668                        (if elmo-imap4-use-uid
 669                            "uid fetch %s bodystructure"
 670                          "fetch %s bodystructure")
 671                        number))
 672                      'fetch)
 673                     'bodystructure))
 674         (when (elmo-fetch-strategy-save-cache strategy)
 675           (elmo-file-cache-delete
 676            (elmo-fetch-strategy-cache-path strategy))
 677           (elmo-object-save
 678            (elmo-file-cache-expand-path
 679             (elmo-fetch-strategy-cache-path strategy)
 680             "bodystructure")
 681            bodystructure))))))
 682
 683 ;;; Backend methods.
 684 (luna-define-method elmo-create-folder-plugged ((folder elmo-imap4-folder))
 685   (elmo-imap4-send-command-wait
 686    (elmo-imap4-get-session folder)
 687    (list "create " (elmo-imap4-mailbox
 688                     (elmo-imap4-folder-mailbox-internal folder)))))
 689
 690 (defun elmo-imap4-get-session (folder &optional if-exists)
 691   (elmo-network-get-session 'elmo-imap4-session
 692                             (concat
 693                              (if (elmo-folder-biff-internal folder)
 694                                  "BIFF-")
 695                              "IMAP")
 696                             folder if-exists))
 697
 698 (defun elmo-imap4-session-select-mailbox (session mailbox
 699                                                   &optional force no-error)
 700   "Select MAILBOX in SESSION.
 701 If optional argument FORCE is non-nil, select mailbox even if current mailbox
 702 is same as MAILBOX.
 703 If second optional argument NO-ERROR is non-nil, don't cause an error when
 704 selecting folder was failed.
 705 If NO-ERROR is 'notify-bye, only BYE response is reported as error.
 706 Returns response value if selecting folder succeed. "
 707   (when (or force
 708             (not (string=
 709                   (elmo-imap4-session-current-mailbox-internal session)
 710                   mailbox)))
 711     (let (response result)
 712       (unwind-protect
 713           (setq response
 714                 (elmo-imap4-read-response
 715                  session
 716                  (elmo-imap4-send-command
 717                   session
 718                   (list
 719                    "select "
 720                    (elmo-imap4-mailbox mailbox)))))
 721         (if (setq result (elmo-imap4-response-ok-p response))
 722             (progn
 723               (elmo-imap4-session-set-current-mailbox-internal session mailbox)
 724               (elmo-imap4-session-set-read-only-internal
 725                session
 726                (nth 1 (assq 'read-only (assq 'ok response))))
 727               (elmo-imap4-session-set-flags-internal
 728                session
 729                (nth 1 (or (assq 'permanentflags response)
 730                           (assq 'flags response)))))
 731           (elmo-imap4-session-set-current-mailbox-internal session nil)
 732           (if (and (eq no-error 'notify-bye)
 733                    (elmo-imap4-response-bye-p response))
 734               (elmo-imap4-process-bye session)
 735             (unless no-error
 736               (error "%s"
 737                      (or (elmo-imap4-response-error-text response)
 738                          (format "Select %s failed" mailbox)))))))
 739       (and result response))))
 740
 741 (defun elmo-imap4-check-validity (spec validity-file)
 742 ;;; Not used.
 743 ;;;(elmo-imap4-send-command-wait
 744 ;;;(elmo-imap4-get-session spec)
 745 ;;;(list "status "
 746 ;;;      (elmo-imap4-mailbox
 747 ;;;       (elmo-imap4-spec-mailbox spec))
 748 ;;;      " (uidvalidity)")))
 749   )
 750
 751 (defun elmo-imap4-sync-validity  (spec validity-file)
 752   ;; Not used.
 753   )
 754
 755 (defun elmo-imap4-elist (folder query tags)
 756   (let ((session (elmo-imap4-get-session folder)))
 757     (elmo-imap4-session-select-mailbox
 758      session
 759      (elmo-imap4-folder-mailbox-internal folder))
 760     (let ((answer (elmo-imap4-response-value
 761                    (elmo-imap4-send-command-wait
 762                     session query) 'esearch))
 763           tag result)
 764       (while answer
 765         (setq tag (intern (downcase (car answer))))
 766         (cond ((eq tag 'uid)
 767                nil)
 768               ((memq tag tags)
 769                (setq result
 770                      (append result
 771                              (if (eq tag 'all)
 772                                  (sort
 773                                   (elmo-number-set-to-number-list
 774                                    (mapcar #'(lambda (x)
 775                                                (let ((y (split-string x ":")))
 776                                                  (if (null (cdr y))
 777                                                      (string-to-number (car y))
 778                                                    (cons (string-to-number (car y))
 779                                                          (string-to-number (cadr y))))))
 780                                            (split-string (cadr answer) "\,"))) '<)
 781                                (string-to-number (cadr answer))))))
 782               (t nil))
 783         (setq answer (cdr answer)))
 784       result)))
 785
 786 (defun elmo-imap4-list (folder flag)
 787   (let ((session (elmo-imap4-get-session folder)))
 788     (elmo-imap4-session-select-mailbox
 789      session
 790      (elmo-imap4-folder-mailbox-internal folder))
 791     (if (elmo-imap4-session-capable-p session 'esearch)
 792         (elmo-imap4-elist folder
 793                           (concat (if elmo-imap4-use-uid "uid " "")
 794                                   "search return (all) " flag) '(all))
 795       (elmo-imap4-response-value
 796        (elmo-imap4-send-command-wait
 797         session
 798         (format (if elmo-imap4-use-uid "uid search %s"
 799                   "search %s") flag))
 800        'search))))
 801
 802 (defun elmo-imap4-session-flag-available-p (session flag)
 803   (case flag
 804     ((read unread) (elmo-string-member-ignore-case
 805                     "\\seen" (elmo-imap4-session-flags-internal session)))
 806     (important
 807      (elmo-string-member-ignore-case
 808       "\\flagged" (elmo-imap4-session-flags-internal session)))
 809     (digest
 810      (or (elmo-string-member-ignore-case
 811           "\\seen" (elmo-imap4-session-flags-internal session))
 812          (elmo-string-member-ignore-case
 813           "\\flagged" (elmo-imap4-session-flags-internal session))))
 814     (answered
 815      (elmo-string-member-ignore-case
 816       (concat "\\" (symbol-name flag))
 817       (elmo-imap4-session-flags-internal session)))
 818     (t
 819      (member "\\*" (elmo-imap4-session-flags-internal session)))))
 820
 821 (defun elmo-imap4-flag-to-imap-search-key (flag)
 822   (case flag
 823     (read "seen")
 824     (unread "unseen")
 825     (important "flagged")
 826     (answered "answered")
 827     (new "new")
 828     (t (concat
 829         "keyword "
 830         (or (car (cdr (assq flag elmo-imap4-flag-specs)))
 831             (symbol-name flag))))))
 832
 833 (defun elmo-imap4-flag-to-imap-criteria (flag)
 834   (case flag
 835     ((any digest)
 836      (let ((criteria "flagged")
 837            (global-flags (delq 'important (elmo-get-global-flags t t))))
 838        (dolist (flag (delete 'new
 839                              (delete 'cached
 840                                      (copy-sequence
 841                                       (case flag
 842                                         (any
 843                                          elmo-preserved-flags)
 844                                         (digest
 845                                          elmo-digest-flags))))))
 846          (setq criteria (concat "or "
 847                                 (elmo-imap4-flag-to-imap-search-key flag)
 848                                 " "
 849                                 criteria)))
 850        (while global-flags
 851          (setq criteria (concat "or keyword "
 852                                 (symbol-name (car global-flags))
 853                                 " "
 854                                 criteria))
 855          (setq global-flags (cdr global-flags)))
 856        criteria))
 857     (t
 858      (elmo-imap4-flag-to-imap-search-key flag))))
 859
 860 (defun elmo-imap4-folder-list-flagged (folder flag &optional type)
 861   "List flagged message numbers in the FOLDER.
 862 FLAG is one of the `unread', `read', `important', `answered',
 863 `any'.
 864 When optional argument TYPE is symbol 'unmatch, negate search
 865 condition."
 866   (let ((session (elmo-imap4-get-session folder))
 867         (criteria (concat (if (eq type 'unmatch) "not " "")
 868                           (elmo-imap4-flag-to-imap-criteria flag))))
 869     (if (elmo-imap4-session-flag-available-p session flag)
 870         (elmo-imap4-list folder criteria)
 871       ;; List flagged messages in the msgdb.
 872       (elmo-msgdb-list-flagged (elmo-folder-msgdb folder) flag))))
 873
 874 (defvar elmo-imap4-rfc822-size "RFC822\.SIZE")
 875 (defvar elmo-imap4-rfc822-text "RFC822\.TEXT")
 876 (defvar elmo-imap4-rfc822-header "RFC822\.HEADER")
 877 (defvar elmo-imap4-header-fields "HEADER\.FIELDS")
 878
 879 (defun elmo-imap4-make-number-set-list (msg-list &optional chop-length)
 880   "Make RFC2060's message set specifier from MSG-LIST.
 881 Returns a list of (NUMBER . SET-STRING).
 882 SET-STRING is the message set specifier described in RFC2060.
 883 NUMBER is contained message number in SET-STRING.
 884 Every SET-STRING does not contain number of messages longer than CHOP-LENGTH.
 885 If CHOP-LENGTH is not specified, message set is not chopped."
 886   (let (count cont-list set-list)
 887     (setq msg-list (sort (copy-sequence msg-list) '<))
 888     (while msg-list
 889       (setq cont-list nil)
 890       (setq count 0)
 891       (unless chop-length
 892         (setq chop-length (length msg-list)))
 893       (while (and (not (null msg-list))
 894                   (< count chop-length))
 895         (setq cont-list
 896               (elmo-number-set-append
 897                cont-list (car msg-list)))
 898         (incf count)
 899         (setq msg-list (cdr msg-list)))
 900       (setq set-list
 901             (cons
 902              (cons
 903               count
 904               (mapconcat
 905                (lambda (x)
 906                  (cond ((consp x)
 907                         (format "%s:%s" (car x) (cdr x)))
 908                        ((integerp x)
 909                         (number-to-string x))))
 910                cont-list
 911                ","))
 912              set-list)))
 913     (nreverse set-list)))
 914
 915 ;;
 916 ;; app-data:
 917 ;; cons of flag-table and folder structure
 918 (defsubst elmo-imap4-fetch-callback-1-subr (entity flags app-data)
 919   "A msgdb entity callback function."
 920   (let ((use-flag (elmo-folder-use-flag-p (cdr app-data)))
 921         (flag-table (car app-data))
 922         (msg-id (elmo-message-entity-field entity 'message-id))
 923         saved-flags flag-list)
 924 ;;;    (when (elmo-string-member-ignore-case "\\Flagged" flags)
 925 ;;;      (elmo-msgdb-global-mark-set msg-id elmo-msgdb-important-mark))
 926     (setq saved-flags (elmo-flag-table-get flag-table msg-id)
 927           flag-list
 928           (if use-flag
 929               (append
 930                (and (memq 'new saved-flags)
 931                     (not (elmo-string-member-ignore-case "\\Seen" flags))
 932                     '(new))
 933                (and (elmo-string-member-ignore-case "\\Flagged" flags)
 934                     '(important))
 935                (and (not (elmo-string-member-ignore-case "\\Seen" flags))
 936                     '(unread))
 937                (and (elmo-string-member-ignore-case "\\Answered" flags)
 938                     '(answered))
 939                (and (elmo-file-cache-exists-p msg-id)
 940                     '(cached)))
 941             saved-flags))
 942     (when (and (or (memq 'important flag-list)
 943                    (memq 'answered flag-list))
 944                (memq 'unread flag-list))
 945       (setq elmo-imap4-seen-messages
 946             (cons (elmo-message-entity-number entity)
 947                   elmo-imap4-seen-messages)))
 948     (elmo-msgdb-append-entity elmo-imap4-current-msgdb
 949                               entity
 950                               flag-list)))
 951
 952 ;; Current buffer is process buffer.
 953 (defun elmo-imap4-fetch-callback-1 (element app-data)
 954   (let ((handler (elmo-msgdb-message-entity-handler elmo-imap4-current-msgdb)))
 955     (elmo-imap4-fetch-callback-1-subr
 956      (with-temp-buffer
 957        (insert (or (elmo-imap4-response-bodydetail-text element)
 958                    ""))
 959        ;; Replace all CRLF with LF.
 960        (elmo-delete-cr-buffer)
 961        (elmo-msgdb-create-message-entity-from-buffer
 962         handler
 963         (elmo-imap4-response-value element 'uid)
 964         :size (elmo-imap4-response-value element 'rfc822size)))
 965      (elmo-imap4-response-value element 'flags)
 966      app-data)
 967     (elmo-progress-notify 'elmo-folder-msgdb-create)))
 968
 969 (defun elmo-imap4-parse-capability (string)
 970   (if (string-match "^\\*\\(.*\\)$" string)
 971       (read
 972        (concat "(" (downcase (elmo-match-string 1 string)) ")"))))
 973
 974 (defun elmo-imap4-clear-login (session)
 975   (when (elmo-imap4-session-capable-p session 'logindisabled)
 976     (signal 'elmo-authenticate-error '(elmo-imap4-clear-login)))
 977   (let ((elmo-imap4-debug-inhibit-logging t))
 978     (or
 979      (elmo-imap4-read-ok
 980       session
 981       (elmo-imap4-send-command
 982        session
 983        (list "login "
 984              (elmo-imap4-userid (elmo-network-session-user-internal session))
 985              " "
 986              (elmo-imap4-password
 987               (elmo-get-passwd (elmo-network-session-password-key session))))))
 988      (signal 'elmo-authenticate-error '(elmo-imap4-clear-login)))))
 989
 990 (defun elmo-imap4-auth-login (session)
 991   (let ((tag (elmo-imap4-send-command session "authenticate login"))
 992         (elmo-imap4-debug-inhibit-logging t))
 993     (or (elmo-imap4-read-continue-req session)
 994         (signal 'elmo-authenticate-error '(elmo-imap4-auth-login)))
 995     (elmo-imap4-send-string session
 996                             (elmo-base64-encode-string
 997                              (elmo-network-session-user-internal session)))
 998     (or (elmo-imap4-read-continue-req session)
 999         (signal 'elmo-authenticate-error '(elmo-imap4-auth-login)))
1000     (elmo-imap4-send-string session
1001                             (elmo-base64-encode-string
1002                              (elmo-get-passwd
1003                               (elmo-network-session-password-key session))))
1004     (or (elmo-imap4-read-ok session tag)
1005         (signal 'elmo-authenticate-error '(elmo-imap4-auth-login)))
1006     (setq elmo-imap4-status 'auth)))
1007
1008 (luna-define-method
1009   elmo-network-initialize-session-buffer :after ((session
1010                                                   elmo-imap4-session) buffer)
1011   (with-current-buffer buffer
1012     (mapc 'make-variable-buffer-local elmo-imap4-local-variables)
1013     (setq elmo-imap4-seqno 0)
1014     (setq elmo-imap4-status 'initial)))
1015
1016 (luna-define-method elmo-network-initialize-session ((session
1017                                                       elmo-imap4-session))
1018   (let ((process (elmo-network-session-process-internal session)))
1019     (with-current-buffer (process-buffer process)
1020       ;; Skip garbage output from process before greeting.
1021       (while (and (memq (process-status process) '(open run))
1022                   (goto-char (point-max))
1023                   (or (/= (forward-line -1) 0)
1024                       (not (elmo-imap4-parse-greeting))))
1025         (accept-process-output process 1))
1026       (erase-buffer)
1027       (set-process-filter process 'elmo-imap4-arrival-filter)
1028       (set-process-sentinel process 'elmo-imap4-sentinel)
1029 ;;;      (while (and (memq (process-status process) '(open run))
1030 ;;;               (eq elmo-imap4-status 'initial))
1031 ;;;     (message "Waiting for server response...")
1032 ;;;     (accept-process-output process 1))
1033 ;;;      (message "")
1034       (unless (memq elmo-imap4-status '(nonauth auth))
1035         (signal 'elmo-open-error
1036                 (list 'elmo-network-initialize-session)))
1037       (elmo-imap4-session-set-capability-internal
1038        session
1039        (elmo-imap4-response-value
1040         (elmo-imap4-send-command-wait session "capability")
1041         'capability))
1042       (when (eq (elmo-network-stream-type-symbol
1043                  (elmo-network-session-stream-type-internal session))
1044                 'starttls)
1045         (or (elmo-imap4-session-capable-p session 'starttls)
1046             (signal 'elmo-open-error
1047                     '(elmo-imap4-starttls-error)))
1048         (elmo-imap4-send-command-wait session "starttls")
1049         (starttls-negotiate process)
1050         (elmo-imap4-session-set-capability-internal
1051          session
1052          (elmo-imap4-response-value
1053           (elmo-imap4-send-command-wait session "capability")
1054           'capability))))))
1055
1056 (luna-define-method elmo-network-authenticate-session ((session
1057                                                         elmo-imap4-session))
1058   (with-current-buffer (process-buffer
1059                         (elmo-network-session-process-internal session))
1060     (let* ((auth (elmo-network-session-auth-internal session))
1061            (auth (if (listp auth) auth (list auth))))
1062       (unless (or (eq elmo-imap4-status 'auth)
1063                   (null auth))
1064         (cond
1065          ((eq 'clear (car auth))
1066           (elmo-imap4-clear-login session))
1067          ((eq 'login (car auth))
1068           (elmo-imap4-auth-login session))
1069          (t
1070           (let* ((elmo-imap4-debug-inhibit-logging t)
1071                  (sasl-mechanisms
1072                   (delq nil
1073                         (mapcar
1074                          (lambda (cap)
1075                            (if (string-match "^auth=\\(.*\\)$"
1076                                              (symbol-name cap))
1077                                (match-string 1 (upcase (symbol-name cap)))))
1078                          (elmo-imap4-session-capability-internal session))))
1079                  (mechanism
1080                   (sasl-find-mechanism
1081                    (delq nil
1082                          (mapcar (lambda (cap) (upcase (symbol-name cap)))
1083                                  (if (listp auth)
1084                                      auth
1085                                    (list auth)))))) ;)
1086                  client name step response tag
1087                  sasl-read-passphrase)
1088             (unless mechanism
1089               (if (or elmo-imap4-force-login
1090                       (y-or-n-p
1091                        (format
1092                         "There's no %s capability in server. continue?"
1093                         (elmo-list-to-string
1094                          (elmo-network-session-auth-internal session)))))
1095                   (setq mechanism (sasl-find-mechanism
1096                                    sasl-mechanisms))
1097                 (signal 'elmo-authenticate-error
1098                         '(elmo-imap4-auth-no-mechanisms))))
1099             (setq client
1100                   (sasl-make-client
1101                    mechanism
1102                    (elmo-network-session-user-internal session)
1103                    "imap"
1104                    (elmo-network-session-server-internal session)))
1105 ;;;         (if elmo-imap4-auth-user-realm
1106 ;;;             (sasl-client-set-property client 'realm elmo-imap4-auth-user-realm))
1107             (setq name (sasl-mechanism-name mechanism)
1108                   step (sasl-next-step client nil))
1109             (elmo-network-session-set-auth-internal
1110              session
1111              (intern (downcase name)))
1112             (setq sasl-read-passphrase
1113                   (lambda (prompt)
1114                     (elmo-get-passwd
1115                      (elmo-network-session-password-key session))))
1116             (setq tag
1117                   (elmo-imap4-send-command
1118                    session
1119                    (concat "AUTHENTICATE " name
1120                            (and (sasl-step-data step)
1121                                 (concat
1122                                  " "
1123                                  (elmo-base64-encode-string
1124                                   (sasl-step-data step)
1125                                   'no-lin-break))))))
1126             (catch 'done
1127               (while t
1128                 (setq response
1129                       (elmo-imap4-read-untagged
1130                        (elmo-network-session-process-internal session)))
1131                 (if (elmo-imap4-response-ok-p response)
1132                     (if (sasl-next-step client step)
1133                         ;; Bogus server?
1134                         (signal 'elmo-authenticate-error
1135                                 (list (intern
1136                                        (concat "elmo-imap4-auth-"
1137                                                (downcase name)))))
1138                       ;; The authentication process is finished.
1139                       (throw 'done nil)))
1140                 (unless (elmo-imap4-response-continue-req-p response)
1141                   ;; response is NO or BAD.
1142                   (signal 'elmo-authenticate-error
1143                           (list (intern
1144                                  (concat "elmo-imap4-auth-"
1145                                          (downcase name))))))
1146                 (sasl-step-set-data
1147                  step
1148                  (elmo-base64-decode-string
1149                   (elmo-imap4-response-value response 'continue-req)))
1150                 (setq step (sasl-next-step client step))
1151                 (setq tag
1152                       (elmo-imap4-send-string
1153                        session
1154                        (if (sasl-step-data step)
1155                            (elmo-base64-encode-string (sasl-step-data step)
1156                                                       'no-line-break)
1157                          "")))))))
1158 ;; Some servers return reduced capabilities when client asks for them
1159 ;; before login. It might be a good idea to ask them again, otherwise
1160 ;; we can miss some useful feature.
1161          (elmo-imap4-session-set-capability-internal
1162           session
1163           (elmo-imap4-response-value
1164            (elmo-imap4-send-command-wait session "capability")
1165            'capability)))))))
1166
1167 (luna-define-method elmo-network-setup-session ((session
1168                                                  elmo-imap4-session))
1169   (with-current-buffer (elmo-network-session-buffer session)
1170     (when (elmo-imap4-session-capable-p session 'namespace)
1171       (setq elmo-imap4-server-namespace
1172             (elmo-imap4-response-value
1173              (elmo-imap4-send-command-wait session "namespace")
1174              'namespace)))))
1175
1176 (defun elmo-imap4-setup-send-buffer (&optional string)
1177   (let ((send-buf (get-buffer-create " *elmo-imap4-setup-send-buffer*"))
1178         (source-buf (unless string (current-buffer))))
1179     (save-excursion
1180       (save-match-data
1181         (set-buffer send-buf)
1182         (erase-buffer)
1183         (set-buffer-multibyte nil)
1184         (if string
1185             (insert string)
1186           (with-current-buffer source-buf
1187             (copy-to-buffer send-buf (point-min) (point-max))))
1188         (goto-char (point-min))
1189         (if (eq (re-search-forward "^$" nil t)
1190                 (point-max))
1191             (insert "\n"))
1192         (goto-char (point-min))
1193         (while (search-forward "\n" nil t)
1194           (replace-match "\r\n"))))
1195     send-buf))
1196
1197 (defun elmo-imap4-setup-send-buffer-from-file (file)
1198   (let ((tmp-buf (get-buffer-create
1199                   " *elmo-imap4-setup-send-buffer-from-file*")))
1200     (save-excursion
1201       (save-match-data
1202         (set-buffer tmp-buf)
1203         (erase-buffer)
1204         (as-binary-input-file
1205          (insert-file-contents file))
1206         (goto-char (point-min))
1207         (if (eq (re-search-forward "^$" nil t)
1208                 (point-max))
1209             (insert "\n"))
1210         (goto-char (point-min))
1211         (while (search-forward "\n" nil t)
1212           (replace-match "\r\n"))))
1213     tmp-buf))
1214
1215 (luna-define-method elmo-delete-message-safe ((folder elmo-imap4-folder)
1216                                               number msgid)
1217   (let ((session (elmo-imap4-get-session folder))
1218         candidates)
1219     (elmo-imap4-session-select-mailbox
1220      session
1221      (elmo-imap4-folder-mailbox-internal folder))
1222     (setq candidates
1223           (elmo-imap4-response-value
1224            (elmo-imap4-send-command-wait session
1225                                          (list
1226                                           (if elmo-imap4-use-uid
1227                                               "uid search header message-id "
1228                                             "search header message-id ")
1229                                           (elmo-imap4-field-body msgid)))
1230            'search))
1231     (if (memq number candidates)
1232         (elmo-folder-delete-messages folder (list number)))))
1233
1234 (defun elmo-imap4-server-diff-async-callback-1 (status data)
1235   (funcall elmo-imap4-server-diff-async-callback
1236            (list (elmo-imap4-response-value status 'recent)
1237                  (elmo-imap4-response-value status 'unseen)
1238                  (elmo-imap4-response-value status 'messages))
1239            data))
1240
1241 (defun elmo-imap4-server-diff-async (folder)
1242   (let ((session (elmo-imap4-get-session folder)))
1243     ;; We should `check' folder to obtain newest information here.
1244     ;; But since there's no asynchronous check mechanism in elmo yet,
1245     ;; checking is not done here.
1246     (with-current-buffer (elmo-network-session-buffer session)
1247       (setq elmo-imap4-status-callback
1248             'elmo-imap4-server-diff-async-callback-1)
1249       (setq elmo-imap4-status-callback-data
1250             elmo-imap4-server-diff-async-callback-data))
1251     (elmo-imap4-send-command session
1252                              (list
1253                               "status "
1254                               (elmo-imap4-mailbox
1255                                (elmo-imap4-folder-mailbox-internal folder))
1256                               " (recent unseen messages)"))))
1257
1258 (luna-define-method elmo-server-diff-async ((folder elmo-imap4-folder))
1259   (let ((session (elmo-imap4-get-session folder)))
1260 ;;;    ;; commit.
1261 ;;;    (elmo-imap4-commit spec)
1262     (with-current-buffer (elmo-network-session-buffer session)
1263       (setq elmo-imap4-status-callback
1264             'elmo-imap4-server-diff-async-callback-1)
1265       (setq elmo-imap4-status-callback-data
1266             elmo-imap4-server-diff-async-callback-data))
1267     (elmo-imap4-send-command session
1268                              (list
1269                               "status "
1270                               (elmo-imap4-mailbox
1271                                (elmo-imap4-folder-mailbox-internal folder))
1272                               " (recent unseen messages)"))))
1273
1274 ;;; IMAP parser.
1275
1276 (defvar elmo-imap4-server-eol "\r\n"
1277   "The EOL string sent from the server.")
1278
1279 (defvar elmo-imap4-client-eol "\r\n"
1280   "The EOL string we send to the server.")
1281
1282 (defvar elmo-imap4-literal-progress-reporter nil)
1283
1284 (defun elmo-imap4-find-next-line ()
1285   "Return point at end of current line, taking into account literals.
1286 Return nil if no complete line has arrived."
1287   (when (re-search-forward (concat elmo-imap4-server-eol "\\|{\\([0-9]+\\)}"
1288                                    elmo-imap4-server-eol)
1289                            nil t)
1290     (if (match-string 1)
1291         (if (< (point-max) (+ (point) (string-to-number (match-string 1))))
1292             (progn
1293               (when elmo-imap4-literal-progress-reporter
1294                 (elmo-progress-notify
1295                  'elmo-retrieve-message
1296                  :set (- (point-max) (point))
1297                  :total (string-to-number (match-string 1))))
1298               nil)
1299           (goto-char (+ (point) (string-to-number (match-string 1))))
1300           (elmo-imap4-find-next-line))
1301       (point))))
1302
1303 (defun elmo-imap4-sentinel (process string)
1304   (delete-process process))
1305
1306 (defun elmo-imap4-arrival-filter (proc string)
1307   "IMAP process filter."
1308   (when (buffer-live-p (process-buffer proc))
1309   (with-current-buffer (process-buffer proc)
1310     (goto-char (point-max))
1311     (insert string)
1312     (let (end)
1313       (goto-char (point-min))
1314       (while (setq end (elmo-imap4-find-next-line))
1315         (save-restriction
1316           (narrow-to-region (point-min) end)
1317           (delete-backward-char (length elmo-imap4-server-eol))
1318           (goto-char (point-min))
1319           (unwind-protect
1320               (case elmo-imap4-status
1321                 (initial
1322                  (setq elmo-imap4-current-response
1323                        (list
1324                         (list 'greeting (elmo-imap4-parse-greeting)))))
1325                 ((auth nonauth selected examine)
1326                  (setq elmo-imap4-current-response
1327                        (cons (elmo-imap4-parse-response)
1328                              elmo-imap4-current-response)))
1329                 (t
1330                  (message "Unknown state %s in arrival filter"
1331                           elmo-imap4-status)))
1332             (delete-region (point-min) (point-max)))))))))
1333
1334 ;; IMAP parser.
1335
1336 (defsubst elmo-imap4-forward ()
1337   (or (eobp) (forward-char 1)))
1338
1339 (defsubst elmo-imap4-parse-number ()
1340   (when (looking-at "[0-9]+")
1341     (prog1
1342         (string-to-number (match-string 0))
1343       (goto-char (match-end 0)))))
1344
1345 (defsubst elmo-imap4-parse-literal ()
1346   (when (looking-at "{\\([0-9]+\\)}\r\n")
1347     (let ((pos (match-end 0))
1348           (len (string-to-number (match-string 1))))
1349       (if (< (point-max) (+ pos len))
1350           nil
1351         (goto-char (+ pos len))
1352         (buffer-substring pos (+ pos len))))))
1353 ;;;     (list ' pos (+ pos len))))))
1354
1355 (defsubst elmo-imap4-parse-string ()
1356   (cond ((eq (char-after (point)) ?\")
1357          (forward-char 1)
1358          (let ((p (point)) (name ""))
1359            (skip-chars-forward "^\"\\\\")
1360            (setq name (buffer-substring p (point)))
1361            (while (eq (char-after (point)) ?\\)
1362              (setq p (1+ (point)))
1363              (forward-char 2)
1364              (skip-chars-forward "^\"\\\\")
1365              (setq name (concat name (buffer-substring p (point)))))
1366            (forward-char 1)
1367            name))
1368         ((eq (char-after (point)) ?{)
1369          (elmo-imap4-parse-literal))))
1370
1371 (defsubst elmo-imap4-parse-nil ()
1372   (if (looking-at "NIL")
1373       (goto-char (match-end 0))))
1374
1375 (defsubst elmo-imap4-parse-nstring ()
1376   (or (elmo-imap4-parse-string)
1377       (and (elmo-imap4-parse-nil)
1378            nil)))
1379
1380 (defsubst elmo-imap4-parse-astring ()
1381   (or (elmo-imap4-parse-string)
1382       (buffer-substring (point)
1383                         (if (re-search-forward "[(){ \r\n%*\"\\]" nil t)
1384                             (goto-char (1- (match-end 0)))
1385                           (end-of-line)
1386                           (point)))))
1387
1388 (defsubst elmo-imap4-parse-address ()
1389   (let (address)
1390     (when (eq (char-after (point)) ?\()
1391       (elmo-imap4-forward)
1392       (setq address (vector (prog1 (elmo-imap4-parse-nstring)
1393                               (elmo-imap4-forward))
1394                             (prog1 (elmo-imap4-parse-nstring)
1395                               (elmo-imap4-forward))
1396                             (prog1 (elmo-imap4-parse-nstring)
1397                               (elmo-imap4-forward))
1398                             (elmo-imap4-parse-nstring)))
1399       (when (eq (char-after (point)) ?\))
1400         (elmo-imap4-forward)
1401         address))))
1402
1403 (defsubst elmo-imap4-parse-address-list ()
1404   (if (eq (char-after (point)) ?\()
1405       (let (address addresses)
1406         (elmo-imap4-forward)
1407         (while (and (not (eq (char-after (point)) ?\)))
1408                     ;; next line for MS Exchange bug
1409                     (progn (and (eq (char-after (point)) (string-to-char " "))
1410                                 (elmo-imap4-forward)) t)
1411                     (setq address (elmo-imap4-parse-address)))
1412           (setq addresses (cons address addresses)))
1413         (when (eq (char-after (point)) ?\))
1414           (elmo-imap4-forward)
1415           (nreverse addresses)))
1416     (assert (elmo-imap4-parse-nil))))
1417
1418 (defsubst elmo-imap4-parse-mailbox ()
1419   (let ((mailbox (elmo-imap4-parse-astring)))
1420     (if (string-equal "INBOX" (upcase mailbox))
1421         "INBOX"
1422       mailbox)))
1423
1424 (defun elmo-imap4-parse-greeting ()
1425   "Parse a IMAP greeting."
1426   (cond ((looking-at "\\* OK ")
1427          (setq elmo-imap4-status 'nonauth))
1428         ((looking-at "\\* PREAUTH ")
1429          (setq elmo-imap4-status 'auth))
1430         ((looking-at "\\* BYE ")
1431          (setq elmo-imap4-status 'closed))))
1432
1433 (defun elmo-imap4-parse-response ()
1434   "Parse a IMAP command response."
1435   (elmo-imap4-debug "[%s] -> %s" (format-time-string "%T") (buffer-substring (point) (point-max)))
1436   (let (token)
1437     (case (setq token (read (current-buffer)))
1438       (+ (progn
1439            (skip-chars-forward " ")
1440            (list 'continue-req (buffer-substring (point) (point-max)))))
1441       (* (case (prog1 (setq token (read (current-buffer)))
1442                  (elmo-imap4-forward))
1443            (OK         (elmo-imap4-parse-resp-text-code))
1444            (NO         (elmo-imap4-parse-resp-text-code))
1445            (BAD        (elmo-imap4-parse-resp-text-code))
1446            (BYE        (elmo-imap4-parse-bye))
1447            (FLAGS      (list 'flags
1448                              (elmo-imap4-parse-flag-list)))
1449            (LIST       (list 'list (elmo-imap4-parse-data-list)))
1450            (LSUB       (list 'lsub (elmo-imap4-parse-data-list)))
1451            (SEARCH     (list
1452                         'search
1453                         (read (concat "("
1454                                       (buffer-substring (point) (point-max))
1455                                       ")"))))
1456            (ESEARCH     (list
1457                          'esearch
1458                          (cddr (split-string (buffer-substring (point) (point-max)) " " "\,"))))
1459            (STATUS     (elmo-imap4-parse-status))
1460            ;; Added
1461            (NAMESPACE  (elmo-imap4-parse-namespace))
1462            (CAPABILITY (list 'capability
1463                              (read
1464                               (concat "(" (downcase (buffer-substring
1465                                                      (point) (point-max)))
1466                                       ")"))))
1467            (ACL (elmo-imap4-parse-acl))
1468            (t       (case (prog1 (read (current-buffer))
1469                             (elmo-imap4-forward))
1470                       (EXISTS  (list 'exists token))
1471                       (RECENT  (list 'recent token))
1472                       (EXPUNGE (list 'expunge token))
1473                       (FETCH   (elmo-imap4-parse-fetch token))
1474                       (t       (list 'garbage (buffer-string)))))))
1475       (t (if (not (string-match elmo-imap4-seq-prefix (symbol-name token)))
1476              (list 'garbage (buffer-string))
1477            (case (prog1 (read (current-buffer))
1478                    (elmo-imap4-forward))
1479              (OK  (progn
1480                     (setq elmo-imap4-parsing nil)
1481                     (setq token (symbol-name token))
1482                     (elmo-unintern token)
1483                     (elmo-imap4-debug "*%s* OK arrived" token)
1484                     (setq elmo-imap4-reached-tag token)
1485                     (list 'ok (elmo-imap4-parse-resp-text-code))))
1486              (NO  (progn
1487                     (setq elmo-imap4-parsing nil)
1488                     (setq token (symbol-name token))
1489                     (elmo-unintern token)
1490                     (elmo-imap4-debug "*%s* NO arrived" token)
1491                     (setq elmo-imap4-reached-tag token)
1492                     (let (code text)
1493                       (when (eq (char-after (point)) ?\[)
1494                         (setq code (buffer-substring (point)
1495                                                      (search-forward "]")))
1496                         (elmo-imap4-forward))
1497                       (setq text (buffer-substring (point) (point-max)))
1498                       (list 'no (list code text)))))
1499              (BAD (progn
1500                     (setq elmo-imap4-parsing nil)
1501                     (elmo-imap4-debug "*%s* BAD arrived" token)
1502                     (setq token (symbol-name token))
1503                     (elmo-unintern token)
1504                     (setq elmo-imap4-reached-tag token)
1505                     (let (code text)
1506                       (when (eq (char-after (point)) ?\[)
1507                         (setq code (buffer-substring (point)
1508                                                      (search-forward "]")))
1509                         (elmo-imap4-forward))
1510                       (setq text (buffer-substring (point) (point-max)))
1511                       (list 'bad (list code text)))))
1512              (t   (list 'garbage (buffer-string)))))))))
1513
1514 (defun elmo-imap4-parse-bye ()
1515   (let (code text)
1516     (when (eq (char-after (point)) ?\[)
1517       (setq code (buffer-substring (point)
1518                                    (search-forward "]")))
1519       (elmo-imap4-forward))
1520     (setq text (buffer-substring (point) (point-max)))
1521     (list 'bye (list code text))))
1522
1523 (defun elmo-imap4-parse-text ()
1524   (goto-char (point-min))
1525   (when (search-forward "[" nil t)
1526     (search-forward "]")
1527     (elmo-imap4-forward))
1528   (list 'text (buffer-substring (point) (point-max))))
1529
1530 (defun elmo-imap4-parse-resp-text-code ()
1531   (when (eq (char-after (point)) ?\[)
1532     (elmo-imap4-forward)
1533     (cond ((search-forward "PERMANENTFLAGS " nil t)
1534            (list 'permanentflags (elmo-imap4-parse-flag-list)))
1535           ((search-forward "UIDNEXT " nil t)
1536            (list 'uidnext (read (current-buffer))))
1537           ((search-forward "UNSEEN " nil t)
1538            (list 'unseen (read (current-buffer))))
1539           ((looking-at "UIDVALIDITY \\([0-9]+\\)")
1540            (list 'uidvalidity (match-string 1)))
1541           ((search-forward "READ-ONLY" nil t)
1542            (list 'read-only t))
1543           ((search-forward "READ-WRITE" nil t)
1544            (list 'read-write t))
1545           ((search-forward "NEWNAME " nil t)
1546            (let (oldname newname)
1547              (setq oldname (elmo-imap4-parse-string))
1548              (elmo-imap4-forward)
1549              (setq newname (elmo-imap4-parse-string))
1550              (list 'newname newname oldname)))
1551           ((search-forward "TRYCREATE" nil t)
1552            (list 'trycreate t))
1553           ((looking-at "APPENDUID \\([0-9]+\\) \\([0-9]+\\)")
1554            (list 'appenduid
1555                  (list (match-string 1)
1556                        (string-to-number (match-string 2)))))
1557           ((looking-at "COPYUID \\([0-9]+\\) \\([0-9,:]+\\) \\([0-9,:]+\\)")
1558            (list 'copyuid (list (match-string 1)
1559                                 (match-string 2)
1560                                 (match-string 3))))
1561           ((search-forward "ALERT] " nil t)
1562            (message "IMAP server information: %s"
1563                     (buffer-substring (point) (point-max))))
1564           (t (list 'unknown)))))
1565
1566 (defun elmo-imap4-parse-data-list ()
1567   (let (flags delimiter mailbox)
1568     (setq flags (elmo-imap4-parse-flag-list))
1569     (when (looking-at " NIL\\| \"\\\\?\\(.\\)\"")
1570       (setq delimiter (match-string 1))
1571       (goto-char (1+ (match-end 0)))
1572       (when (setq mailbox (elmo-imap4-parse-mailbox))
1573         (list mailbox flags delimiter)))))
1574
1575 (defsubst elmo-imap4-parse-header-list ()
1576   (when (eq (char-after (point)) ?\()
1577     (let (strlist)
1578       (while (not (eq (char-after (point)) ?\)))
1579         (elmo-imap4-forward)
1580         (push (elmo-imap4-parse-astring) strlist))
1581       (elmo-imap4-forward)
1582       (nreverse strlist))))
1583
1584 (defsubst elmo-imap4-parse-fetch-body-section ()
1585   (let ((section
1586          (buffer-substring (point)
1587                            (1-
1588                             (progn (re-search-forward "[] ]" nil t)
1589                                    (point))))))
1590     (if (eq (char-before) (string-to-char " "))
1591         (prog1
1592             (mapconcat 'identity
1593                        (cons section (elmo-imap4-parse-header-list)) " ")
1594           (search-forward "]" nil t))
1595       section)))
1596
1597 (defun elmo-imap4-parse-fetch (response)
1598   (when (eq (char-after (point)) ?\()
1599     (let (element list)
1600       (while (not (eq (char-after (point)) ?\)))
1601         (elmo-imap4-forward)
1602         (let ((token (read (current-buffer))))
1603           (elmo-imap4-forward)
1604           (setq element
1605                 (cond ((eq token 'UID)
1606                        (list 'uid (condition-case nil
1607                                       (read (current-buffer))
1608                                     (error nil))))
1609                       ((eq token 'FLAGS)
1610                        (list 'flags (elmo-imap4-parse-flag-list)))
1611                       ((eq token 'ENVELOPE)
1612                        (list 'envelope (elmo-imap4-parse-envelope)))
1613                       ((eq token 'INTERNALDATE)
1614                        (list 'internaldate (elmo-imap4-parse-string)))
1615                       ((eq token 'RFC822)
1616                        (list 'rfc822 (elmo-imap4-parse-nstring)))
1617                       ((eq token (intern elmo-imap4-rfc822-header))
1618                        (list 'rfc822header (elmo-imap4-parse-nstring)))
1619                       ((eq token (intern elmo-imap4-rfc822-text))
1620                        (list 'rfc822text (elmo-imap4-parse-nstring)))
1621                       ((eq token (intern elmo-imap4-rfc822-size))
1622                        (list 'rfc822size (read (current-buffer))))
1623                       ((eq token 'BODY)
1624                        (if (eq (char-before) ?\[)
1625                            (list
1626                             'bodydetail
1627                             (upcase (elmo-imap4-parse-fetch-body-section))
1628                             (and
1629                              (eq (char-after (point)) ?<)
1630                              (buffer-substring (1+ (point))
1631                                                (progn
1632                                                  (search-forward ">" nil t)
1633                                                  (point))))
1634                             (progn (elmo-imap4-forward)
1635                                    (elmo-imap4-parse-nstring)))
1636                          (list 'body (elmo-imap4-parse-body))))
1637                       ((eq token 'BODYSTRUCTURE)
1638                        (list 'bodystructure (elmo-imap4-parse-body)))))
1639           (setq list (cons element list))))
1640       (and elmo-imap4-fetch-callback
1641            (funcall elmo-imap4-fetch-callback
1642                     list elmo-imap4-fetch-callback-data))
1643       (list 'fetch list))))
1644
1645 (defun elmo-imap4-parse-status ()
1646   (let ((mailbox (elmo-imap4-parse-mailbox))
1647         status)
1648     (when (and mailbox (search-forward "(" nil t))
1649       (while (not (eq (char-after (point)) ?\)))
1650         (setq status
1651               (cons
1652                (let ((token (read (current-buffer))))
1653                  (case (intern (upcase (symbol-name token)))
1654                    (MESSAGES
1655                     (list 'messages (read (current-buffer))))
1656                    (RECENT
1657                     (list 'recent (read (current-buffer))))
1658                    (UIDNEXT
1659                     (list 'uidnext (read (current-buffer))))
1660                    (UIDVALIDITY
1661                     (and (looking-at " \\([0-9]+\\)")
1662                          (prog1 (list 'uidvalidity (match-string 1))
1663                            (goto-char (match-end 1)))))
1664                    (UNSEEN
1665                     (list 'unseen (read (current-buffer))))
1666                    (t
1667                     (message
1668                      "Unknown status data %s in mailbox %s ignored"
1669                      token mailbox))))
1670                status))
1671         (skip-chars-forward " ")))
1672     (and elmo-imap4-status-callback
1673          (funcall elmo-imap4-status-callback
1674                   status
1675                   elmo-imap4-status-callback-data))
1676     (list 'status status)))
1677
1678
1679 (defmacro elmo-imap4-value (value)
1680   `(if (eq ,value 'NIL)
1681        nil
1682      ,value))
1683
1684 (defmacro elmo-imap4-nth (pos list)
1685   `(let ((value (nth ,pos ,list)))
1686      (elmo-imap4-value value)))
1687
1688 (defun elmo-imap4-parse-namespace ()
1689   (list 'namespace
1690         (nconc
1691          (copy-sequence elmo-imap4-extra-namespace-alist)
1692          (elmo-imap4-parse-namespace-subr
1693           (read (concat "(" (buffer-substring
1694                              (point) (point-max))
1695                         ")"))))))
1696
1697 (defun elmo-imap4-parse-namespace-subr (ns)
1698   (let (prefix delim namespace-alist default-delim)
1699     ;; 0: personal, 1: other, 2: shared
1700     (dotimes (i 3)
1701       (setq namespace-alist
1702             (nconc namespace-alist
1703                    (delq nil
1704                          (mapcar
1705                           (lambda (namespace)
1706                             (setq prefix (elmo-imap4-nth 0 namespace)
1707                                   delim (elmo-imap4-nth 1 namespace))
1708                             (if (and prefix delim
1709                                      (string-match
1710                                       (concat (regexp-quote delim) "\\'")
1711                                       prefix))
1712                                 (setq prefix (substring prefix 0
1713                                                         (match-beginning 0))))
1714                             (if (eq (length prefix) 0)
1715                                 (progn (setq default-delim delim) nil)
1716                               (cons
1717                                (concat "^\\("
1718                                        (if (string= (downcase prefix) "inbox")
1719                                            "[Ii][Nn][Bb][Oo][Xx]"
1720                                          (regexp-quote prefix))
1721                                        "\\).*$")
1722                                delim)))
1723                           (elmo-imap4-nth i ns))))))
1724     (if default-delim
1725         (setq namespace-alist
1726               (nconc namespace-alist
1727                      (list (cons "^.*$" default-delim)))))
1728     namespace-alist))
1729
1730 (defun elmo-imap4-parse-acl ()
1731   (let ((mailbox (elmo-imap4-parse-mailbox))
1732         identifier rights acl)
1733     (while (eq (char-after (point)) (string-to-char " "))
1734       (elmo-imap4-forward)
1735       (setq identifier (elmo-imap4-parse-astring))
1736       (elmo-imap4-forward)
1737       (setq rights (elmo-imap4-parse-astring))
1738       (setq acl (append acl (list (cons identifier rights)))))
1739     (list 'acl acl mailbox)))
1740
1741 (defun elmo-imap4-parse-flag-list ()
1742   (let ((str (buffer-substring (+ (point) 1)
1743                                (progn (search-forward ")" nil t)
1744                                       (- (point) 1)))))
1745     (unless (eq (length str) 0)
1746       (split-string str))))
1747
1748 (defun elmo-imap4-parse-envelope ()
1749   (when (eq (char-after (point)) ?\()
1750     (elmo-imap4-forward)
1751     (vector (prog1 (elmo-imap4-parse-nstring);; date
1752               (elmo-imap4-forward))
1753             (prog1 (elmo-imap4-parse-nstring);; subject
1754               (elmo-imap4-forward))
1755             (prog1 (elmo-imap4-parse-address-list);; from
1756               (elmo-imap4-forward))
1757             (prog1 (elmo-imap4-parse-address-list);; sender
1758               (elmo-imap4-forward))
1759             (prog1 (elmo-imap4-parse-address-list);; reply-to
1760               (elmo-imap4-forward))
1761             (prog1 (elmo-imap4-parse-address-list);; to
1762               (elmo-imap4-forward))
1763             (prog1 (elmo-imap4-parse-address-list);; cc
1764               (elmo-imap4-forward))
1765             (prog1 (elmo-imap4-parse-address-list);; bcc
1766               (elmo-imap4-forward))
1767             (prog1 (elmo-imap4-parse-nstring);; in-reply-to
1768               (elmo-imap4-forward))
1769             (prog1 (elmo-imap4-parse-nstring);; message-id
1770               (elmo-imap4-forward)))))
1771
1772 (defsubst elmo-imap4-parse-string-list ()
1773   (cond ((eq (char-after (point)) ?\();; body-fld-param
1774          (let (strlist str)
1775            (elmo-imap4-forward)
1776            (while (setq str (elmo-imap4-parse-string))
1777              (push str strlist)
1778              (elmo-imap4-forward))
1779            (nreverse strlist)))
1780         ((elmo-imap4-parse-nil)
1781          nil)))
1782
1783 (defun elmo-imap4-parse-body-extension ()
1784   (if (eq (char-after (point)) ?\()
1785       (let (b-e)
1786         (elmo-imap4-forward)
1787         (push (elmo-imap4-parse-body-extension) b-e)
1788         (while (eq (char-after (point)) (string-to-char " "))
1789           (elmo-imap4-forward)
1790           (push (elmo-imap4-parse-body-extension) b-e))
1791         (assert (eq (char-after (point)) ?\)))
1792         (elmo-imap4-forward)
1793         (nreverse b-e))
1794     (or (elmo-imap4-parse-number)
1795         (elmo-imap4-parse-nstring))))
1796
1797 (defsubst elmo-imap4-parse-body-ext ()
1798   (let (ext)
1799     (when (eq (char-after (point)) (string-to-char " ")) ; body-fld-dsp
1800       (elmo-imap4-forward)
1801       (let (dsp)
1802         (if (eq (char-after (point)) ?\()
1803             (progn
1804               (elmo-imap4-forward)
1805               (push (elmo-imap4-parse-string) dsp)
1806               (elmo-imap4-forward)
1807               (push (elmo-imap4-parse-string-list) dsp)
1808               (elmo-imap4-forward))
1809           (assert (elmo-imap4-parse-nil)))
1810         (push (nreverse dsp) ext))
1811       (when (eq (char-after (point)) (string-to-char " ")) ; body-fld-lang
1812         (elmo-imap4-forward)
1813         (if (eq (char-after (point)) ?\()
1814             (push (elmo-imap4-parse-string-list) ext)
1815           (push (elmo-imap4-parse-nstring) ext))
1816         (while (eq (char-after (point)) (string-to-char " "));; body-extension
1817           (elmo-imap4-forward)
1818           (setq ext (append (elmo-imap4-parse-body-extension) ext)))))
1819     ext))
1820
1821 (defun elmo-imap4-parse-body ()
1822   (let (body)
1823     (when (eq (char-after (point)) ?\()
1824       (elmo-imap4-forward)
1825       (if (eq (char-after (point)) ?\()
1826           (let (subbody)
1827             (while (and (eq (char-after (point)) ?\()
1828                         (setq subbody (elmo-imap4-parse-body)))
1829               (push subbody body))
1830             (elmo-imap4-forward)
1831             (push (elmo-imap4-parse-string) body);; media-subtype
1832             (when (eq (char-after (point)) (string-to-char " ")) ; body-ext-mpart:
1833               (elmo-imap4-forward)
1834               (if (eq (char-after (point)) ?\();; body-fld-param
1835                   (push (elmo-imap4-parse-string-list) body)
1836                 (push (and (elmo-imap4-parse-nil) nil) body))
1837               (setq body
1838                     (append (elmo-imap4-parse-body-ext) body)));; body-ext-...
1839             (assert (eq (char-after (point)) ?\)))
1840             (elmo-imap4-forward)
1841             (nreverse body))
1842
1843         (push (elmo-imap4-parse-string) body);; media-type
1844         (elmo-imap4-forward)
1845         (push (elmo-imap4-parse-string) body);; media-subtype
1846         (elmo-imap4-forward)
1847         ;; next line for Sun SIMS bug
1848         (and (eq (char-after (point)) (string-to-char " "))
1849              (elmo-imap4-forward))
1850         (if (eq (char-after (point)) ?\();; body-fld-param
1851             (push (elmo-imap4-parse-string-list) body)
1852           (push (and (elmo-imap4-parse-nil) nil) body))
1853         (elmo-imap4-forward)
1854         (push (elmo-imap4-parse-nstring) body);; body-fld-id
1855         (elmo-imap4-forward)
1856         (push (elmo-imap4-parse-nstring) body);; body-fld-desc
1857         (elmo-imap4-forward)
1858         (push (elmo-imap4-parse-string) body);; body-fld-enc
1859         (elmo-imap4-forward)
1860         (push (elmo-imap4-parse-number) body);; body-fld-octets
1861
1862         ;; ok, we're done parsing the required parts, what comes now is one
1863         ;; of three things:
1864         ;;
1865         ;; envelope       (then we're parsing body-type-msg)
1866         ;; body-fld-lines (then we're parsing body-type-text)
1867         ;; body-ext-1part (then we're parsing body-type-basic)
1868         ;;
1869         ;; the problem is that the two first are in turn optionally followed
1870         ;; by the third.  So we parse the first two here (if there are any)...
1871
1872         (when (eq (char-after (point)) (string-to-char " "))
1873           (elmo-imap4-forward)
1874           (let (lines)
1875             (cond ((eq (char-after (point)) ?\();; body-type-msg:
1876                    (push (elmo-imap4-parse-envelope) body);; envelope
1877                    (elmo-imap4-forward)
1878                    (push (elmo-imap4-parse-body) body);; body
1879                    (elmo-imap4-forward)
1880                    (push (elmo-imap4-parse-number) body));; body-fld-lines
1881                   ((setq lines (elmo-imap4-parse-number));; body-type-text:
1882                    (push lines body));; body-fld-lines
1883                   (t
1884                    (backward-char)))));; no match...
1885
1886         ;; ...and then parse the third one here...
1887
1888         (when (eq (char-after (point)) (string-to-char " ")) ; body-ext-1part:
1889           (elmo-imap4-forward)
1890           (push (elmo-imap4-parse-nstring) body);; body-fld-md5
1891           (setq body
1892                 (append (elmo-imap4-parse-body-ext) body)));; body-ext-1part..
1893
1894         (assert (eq (char-after (point)) ?\)))
1895         (elmo-imap4-forward)
1896         (nreverse body)))))
1897
1898 (luna-define-method elmo-folder-initialize ((folder elmo-imap4-folder) name)
1899   (let ((default-user   elmo-imap4-default-user)
1900         (default-server elmo-imap4-default-server)
1901         (default-port   elmo-imap4-default-port)
1902         (elmo-network-stream-type-alist
1903          (if elmo-imap4-stream-type-alist
1904              (append elmo-imap4-stream-type-alist
1905                      elmo-network-stream-type-alist)
1906            elmo-network-stream-type-alist))
1907         tokens)
1908     (when (string-match "\\(.*\\)@\\(.*\\)" default-server)
1909       ;; case: imap4-default-server is specified like
1910       ;; "hoge%imap.server@gateway".
1911       (setq default-user (elmo-match-string 1 default-server))
1912       (setq default-server (elmo-match-string 2 default-server)))
1913     (setq tokens (car (elmo-parse-separated-tokens
1914                        name
1915                        elmo-imap4-folder-name-syntax)))
1916     ;; mailbox
1917     (elmo-imap4-folder-set-mailbox-internal folder
1918                                             (elmo-imap4-encode-folder-string
1919                                              (cdr (assq 'mailbox tokens))))
1920     ;; user
1921     (elmo-net-folder-set-user-internal folder
1922                                        (or (cdr (assq 'user tokens))
1923                                            default-user))
1924     ;; auth
1925     (elmo-net-folder-set-auth-internal
1926      folder
1927      (let ((auth (cdr (assq 'auth tokens))))
1928        (or (and auth (intern auth))
1929            elmo-imap4-default-authenticate-type
1930            'clear)))
1931     ;; network
1932     (elmo-net-folder-set-parameters
1933      folder
1934      tokens
1935      (list :server      default-server
1936            :port        default-port
1937            :stream-type
1938            (elmo-get-network-stream-type elmo-imap4-default-stream-type)))
1939     folder))
1940
1941 ;;; ELMO IMAP4 folder
1942 (luna-define-method elmo-folder-expand-msgdb-path ((folder
1943                                                     elmo-imap4-folder))
1944   (convert-standard-filename
1945    (let ((mailbox (elmo-imap4-folder-mailbox-internal folder)))
1946      (if (string= "inbox" (downcase mailbox))
1947          (setq mailbox "inbox"))
1948      (if (eq (string-to-char mailbox) ?/)
1949          (setq mailbox (substring mailbox 1 (length mailbox))))
1950      ;; don't use expand-file-name (e.g. %~/something)
1951      (concat
1952       (expand-file-name
1953        (or (elmo-net-folder-user-internal folder) "nobody")
1954        (expand-file-name (or (elmo-net-folder-server-internal folder)
1955                              "nowhere")
1956                          (expand-file-name
1957                           "imap"
1958                           elmo-msgdb-directory)))
1959       "/" mailbox))))
1960
1961 (luna-define-method elmo-folder-status-plugged ((folder
1962                                                  elmo-imap4-folder))
1963   (elmo-imap4-folder-status-plugged folder))
1964
1965 (defun elmo-imap4-folder-status-plugged (folder)
1966   (let ((session (elmo-imap4-get-session folder))
1967         (killed (elmo-msgdb-killed-list-load
1968                  (elmo-folder-msgdb-path folder)))
1969         status)
1970     (with-current-buffer (elmo-network-session-buffer session)
1971       (setq elmo-imap4-status-callback nil)
1972       (setq elmo-imap4-status-callback-data nil))
1973     (setq status (elmo-imap4-response-value
1974                   (elmo-imap4-send-command-wait
1975                    session
1976                    (list "status "
1977                          (elmo-imap4-mailbox
1978                           (elmo-imap4-folder-mailbox-internal folder))
1979                          " (uidnext messages)"))
1980                   'status))
1981     (cons
1982      (- (elmo-imap4-response-value status 'uidnext) 1)
1983      (if killed
1984          (-
1985           (elmo-imap4-response-value status 'messages)
1986           (elmo-msgdb-killed-list-length killed))
1987        (elmo-imap4-response-value status 'messages)))))
1988
1989 (defun elmo-imap4-folder-list-range (folder min max)
1990   (elmo-imap4-list
1991    folder
1992    (concat
1993     (let ((killed
1994           (elmo-folder-killed-list-internal
1995            folder)))
1996       (if (and killed
1997               (eq (length killed) 1)
1998               (consp (car killed))
1999               (eq (car (car killed)) 1))
2000 ;; What about elmo-imap4-use-uid?
2001          (format "uid %d:%s" (cdr (car killed)) max)
2002        (format "uid %s:%s" min max)))
2003     " undeleted")))
2004
2005 (luna-define-method elmo-folder-list-messages-plugged
2006   ((folder elmo-imap4-folder) &optional enable-killed)
2007   (let* ((old (elmo-msgdb-list-messages (elmo-folder-msgdb folder)))
2008          (new (elmo-imap4-folder-list-range
2009                folder (1+ (or (elmo-folder-get-info-max folder) 0)) "*"))
2010          (united-old-new (elmo-union old new)))
2011     (if (= (length united-old-new) (or (elmo-folder-get-info-length folder) 0))
2012         united-old-new
2013       (elmo-union new
2014                   (elmo-imap4-folder-list-range
2015                    folder
2016                    1 (1+ (or (elmo-folder-get-info-max folder) 0)))))))
2017
2018 (luna-define-method elmo-folder-list-flagged-plugged
2019   ((folder elmo-imap4-folder) flag)
2020   (elmo-imap4-folder-list-flagged folder flag))
2021
2022 (luna-define-method elmo-folder-use-flag-p ((folder elmo-imap4-folder))
2023   (not (string-match elmo-imap4-disuse-server-flag-mailbox-regexp
2024                      (elmo-imap4-folder-mailbox-internal folder))))
2025
2026 (luna-define-method elmo-folder-list-subfolders ((folder elmo-imap4-folder)
2027                                                  &optional one-level)
2028   (let* ((root (elmo-imap4-folder-mailbox-internal folder))
2029          (session (elmo-imap4-get-session folder))
2030          (prefix (elmo-folder-prefix-internal folder))
2031          (namespace-assoc
2032                   (elmo-string-matched-assoc
2033                    root
2034                    (with-current-buffer (elmo-network-session-buffer session)
2035                      elmo-imap4-server-namespace)))
2036          (delim (or (cdr namespace-assoc)
2037                  elmo-imap4-default-hierarchy-delimiter))
2038          ;; Append delimiter when root with namespace.
2039          (root-nodelim root)
2040          (root (if (and namespace-assoc
2041                         (match-end 1)
2042                         (string= (substring root (match-end 1))
2043                                  ""))
2044                    (concat root delim)
2045                  root))
2046          result append-serv type)
2047     (setq result (elmo-imap4-response-get-selectable-mailbox-list
2048                   (elmo-imap4-send-command-wait
2049                    session
2050                    (list "list " (elmo-imap4-mailbox root) " *"))))
2051     ;; The response of Courier-imap doesn't contain a specified folder itself.
2052     (unless (member root result)
2053       (setq result
2054             (append result
2055                     (elmo-imap4-response-get-selectable-mailbox-list
2056                      (elmo-imap4-send-command-wait
2057                       session
2058                       (list "list \"\" " (elmo-imap4-mailbox
2059                                           root-nodelim)))))))
2060     (when (or (not (string= (elmo-net-folder-user-internal folder)
2061                             elmo-imap4-default-user))
2062               (not (eq (elmo-net-folder-auth-internal folder)
2063                        (or elmo-imap4-default-authenticate-type 'clear))))
2064       (setq append-serv (concat ":"
2065                                 (elmo-quote-syntactical-element
2066                                  (elmo-net-folder-user-internal folder)
2067                                  'user elmo-imap4-folder-name-syntax))))
2068     (unless (eq (elmo-net-folder-auth-internal folder)
2069                 (or elmo-imap4-default-authenticate-type 'clear))
2070       (setq append-serv
2071             (concat append-serv "/"
2072                     (symbol-name (elmo-net-folder-auth-internal folder)))))
2073     (unless (string= (elmo-net-folder-server-internal folder)
2074                      elmo-imap4-default-server)
2075       (setq append-serv (concat append-serv "@"
2076                                 (elmo-net-folder-server-internal folder))))
2077     (unless (eq (elmo-net-folder-port-internal folder) elmo-imap4-default-port)
2078       (setq append-serv (concat append-serv ":"
2079                                 (number-to-string
2080                                  (elmo-net-folder-port-internal folder)))))
2081     (setq type (elmo-net-folder-stream-type-internal folder))
2082     (unless (eq (elmo-network-stream-type-symbol type)
2083                 elmo-imap4-default-stream-type)
2084       (if type
2085           (setq append-serv (concat append-serv
2086                                     (elmo-network-stream-type-spec-string
2087                                      type)))))
2088     (if one-level
2089         (let ((re-delim (regexp-quote delim))
2090               (case-fold-search nil)
2091               folder ret has-child-p)
2092           ;; Append delimiter
2093           (when (and root
2094                      (not (string= root ""))
2095                      (not (string-match
2096                            (concat "\\(.*\\)" re-delim "\\'")
2097                            root)))
2098             (setq root (concat root delim)))
2099           (while (setq folder (car result))
2100             (setq has-child-p
2101                   (when (string-match
2102                          (concat "^\\(" (regexp-quote root) "[^" re-delim "]" "+\\)"
2103                                  re-delim)
2104                          folder)
2105                     (setq folder (match-string 1 folder))))
2106             (setq result (delq
2107                           nil
2108                           (mapcar (lambda (fld)
2109                                     (if (string-match
2110                                          (concat "^" (regexp-quote folder)
2111                                                  "\\(" re-delim "\\|\\'\\)")
2112                                          fld)
2113                                         (progn (setq has-child-p t) nil)
2114                                       fld))
2115                                   (cdr result)))
2116                   folder (concat prefix
2117                                  (elmo-quote-syntactical-element
2118                                   (elmo-imap4-decode-folder-string folder)
2119                                   'mailbox elmo-imap4-folder-name-syntax)
2120                                  (and append-serv
2121                                       (eval append-serv)))
2122                   ret (append ret (if has-child-p
2123                                       (list (list folder))
2124                                     (list folder)))))
2125           ret)
2126       (mapcar (lambda (fld)
2127                 (concat prefix
2128                         (elmo-quote-syntactical-element
2129                          (elmo-imap4-decode-folder-string fld)
2130                          'mailbox elmo-imap4-folder-name-syntax)
2131                         (and append-serv
2132                              (eval append-serv))))
2133               result))))
2134
2135 (luna-define-method elmo-folder-exists-p-plugged ((folder elmo-imap4-folder))
2136   (let ((session (elmo-imap4-get-session folder)))
2137     (if (string=
2138          (elmo-imap4-session-current-mailbox-internal session)
2139          (elmo-imap4-folder-mailbox-internal folder))
2140         t
2141       (elmo-imap4-session-select-mailbox
2142        session
2143        (elmo-imap4-folder-mailbox-internal folder)
2144        'force 'notify-bye))))
2145
2146 (luna-define-method elmo-folder-creatable-p ((folder elmo-imap4-folder))
2147   t)
2148
2149 (luna-define-method elmo-folder-writable-p ((folder elmo-imap4-folder))
2150   t)
2151
2152 (luna-define-method elmo-folder-delete ((folder elmo-imap4-folder))
2153   (let* ((exists (elmo-folder-exists-p folder))
2154          (msgs (and exists
2155                     (elmo-folder-list-messages folder))))
2156     (when (yes-or-no-p (format "%sDelete msgdb and substance of \"%s\"? "
2157                                (if (> (length msgs) 0)
2158                                    (format "%d msg(s) exists. " (length msgs))
2159                                  "")
2160                                (elmo-folder-name-internal folder)))
2161       (let ((session (elmo-imap4-get-session folder)))
2162         (when (elmo-imap4-folder-mailbox-internal folder)
2163           (when msgs (elmo-folder-delete-messages-internal folder msgs))
2164           ;; close selected mailbox except one with \Noselect attribute
2165           (when exists
2166             (elmo-imap4-send-command-wait session "close"))
2167           (elmo-imap4-send-command-wait
2168            session
2169            (list "delete "
2170                  (elmo-imap4-mailbox
2171                   (elmo-imap4-folder-mailbox-internal folder)))))
2172         (elmo-imap4-session-set-current-mailbox-internal session nil))
2173       (elmo-msgdb-delete-path folder)
2174       t)))
2175
2176 (luna-define-method elmo-folder-rename-internal ((folder elmo-imap4-folder)
2177                                                  new-folder)
2178   (let ((session (elmo-imap4-get-session folder)))
2179     ;; make sure the folder is selected.
2180     (elmo-imap4-session-select-mailbox session
2181                                        (elmo-imap4-folder-mailbox-internal
2182                                         folder))
2183     (elmo-imap4-send-command-wait session "close")
2184     (elmo-imap4-send-command-wait
2185      session
2186      (list "rename "
2187            (elmo-imap4-mailbox
2188             (elmo-imap4-folder-mailbox-internal folder))
2189            " "
2190            (elmo-imap4-mailbox
2191             (elmo-imap4-folder-mailbox-internal new-folder))))
2192     (elmo-imap4-session-set-current-mailbox-internal
2193      session (elmo-imap4-folder-mailbox-internal new-folder))))
2194
2195 (defun elmo-imap4-copy-messages (src-folder dst-folder numbers)
2196   (let ((session (elmo-imap4-get-session src-folder))
2197         (set-list (elmo-imap4-make-number-set-list
2198                    numbers
2199                    elmo-imap4-number-set-chop-length))
2200         succeeds)
2201     (elmo-imap4-session-select-mailbox session
2202                                        (elmo-imap4-folder-mailbox-internal
2203                                         src-folder))
2204     (while set-list
2205       (if (elmo-imap4-send-command-wait session
2206                                         (list
2207                                          (format
2208                                           (if elmo-imap4-use-uid
2209                                               "uid copy %s "
2210                                             "copy %s ")
2211                                           (cdr (car set-list)))
2212                                          (elmo-imap4-mailbox
2213                                           (elmo-imap4-folder-mailbox-internal
2214                                            dst-folder))))
2215           (setq succeeds (append succeeds numbers)))
2216       (setq set-list (cdr set-list)))
2217     succeeds))
2218
2219 (defun elmo-imap4-set-flag (folder numbers flag &optional remove)
2220   "Set flag on messages.
2221 FOLDER is the ELMO folder structure.
2222 NUMBERS is the message numbers to be flagged.
2223 FLAG is the flag name.
2224 If optional argument REMOVE is non-nil, remove FLAG."
2225   (let ((session (elmo-imap4-get-session folder))
2226         response set-list)
2227     (elmo-imap4-session-select-mailbox session
2228                                        (elmo-imap4-folder-mailbox-internal
2229                                         folder))
2230     (when (or (elmo-string-member-ignore-case
2231                flag
2232                (elmo-imap4-session-flags-internal session))
2233               (member "\\*" (elmo-imap4-session-flags-internal session))
2234               (string= flag "\\Deleted")) ; XXX Humm..
2235       (setq set-list (elmo-imap4-make-number-set-list
2236                       numbers
2237                       elmo-imap4-number-set-chop-length))
2238       (while set-list
2239         (with-current-buffer (elmo-network-session-buffer session)
2240           (setq elmo-imap4-fetch-callback nil)
2241           (setq elmo-imap4-fetch-callback-data nil))
2242         (unless (elmo-imap4-response-ok-p
2243                  (elmo-imap4-send-command-wait
2244                   session
2245                   (format
2246                    (if elmo-imap4-use-uid
2247                        "uid store %s %sflags.silent (%s)"
2248                      "store %s %sflags.silent (%s)")
2249                    (cdr (car set-list))
2250                    (if remove "-" "+")
2251                    flag)))
2252           (setq response 'fail))
2253         (setq set-list (cdr set-list)))
2254       (not (eq response 'fail)))))
2255
2256 (luna-define-method elmo-folder-delete-messages-plugged
2257   ((folder elmo-imap4-folder) numbers)
2258   (let ((session (elmo-imap4-get-session folder))
2259         (expunge
2260          (or (null (elmo-imap4-list folder "deleted"))
2261              (y-or-n-p
2262               "There's hidden deleted messages, expunge anyway?"))))
2263     (elmo-imap4-session-select-mailbox
2264      session
2265      (elmo-imap4-folder-mailbox-internal folder))
2266     (unless (elmo-imap4-set-flag folder numbers "\\Deleted")
2267       (error "Failed to set deleted flag"))
2268     (when expunge
2269       (elmo-imap4-send-command session "expunge"))
2270     t))
2271
2272 (defun elmo-imap4-detect-search-charset (string)
2273   (with-temp-buffer
2274     (insert string)
2275     (detect-mime-charset-region (point-min) (point-max))))
2276
2277 (defun elmo-imap4-search-internal-primitive (folder session filter from-msgs)
2278   (let ((search-key (elmo-filter-key filter))
2279         (imap-search-keys '("bcc" "body" "cc" "from" "subject" "to"
2280                             "larger" "smaller" "flag"))
2281         (total 0)
2282         (length (length from-msgs))
2283         charset set-list end results)
2284     (cond
2285      ((string= "last" search-key)
2286       (let ((numbers (or from-msgs (elmo-folder-list-messages folder))))
2287         (nthcdr (max (- (length numbers)
2288                         (string-to-number (elmo-filter-value filter)))
2289                      0)
2290                 numbers)))
2291      ((string= "first" search-key)
2292       (let* ((numbers (or from-msgs (elmo-folder-list-messages folder)))
2293              (rest (nthcdr (string-to-number (elmo-filter-value filter) )
2294                            numbers)))
2295         (mapc (lambda (x) (delete x numbers)) rest)
2296         numbers))
2297      ((string= "flag" search-key)
2298       (elmo-imap4-folder-list-flagged
2299        folder (intern (elmo-filter-value filter)) (elmo-filter-type filter)))
2300      ((or (string= "since" search-key)
2301           (string= "before" search-key))
2302       (setq search-key (concat "sent" search-key)
2303             set-list (elmo-imap4-make-number-set-list
2304                       from-msgs
2305                       elmo-imap4-number-set-chop-length)
2306             end nil)
2307       (while (not end)
2308         (setq results
2309               (append
2310                results
2311                (elmo-imap4-response-value
2312                 (elmo-imap4-send-command-wait
2313                  session
2314                  (format
2315                   (if elmo-imap4-use-uid
2316                       "uid search %s%s%s %s"
2317                     "search %s%s%s %s")
2318                   (if from-msgs
2319                       (concat
2320                        (if elmo-imap4-use-uid "uid ")
2321                        (cdr (car set-list))
2322                        " ")
2323                     "")
2324                   (if (eq (elmo-filter-type filter)
2325                           'unmatch)
2326                       "not " "")
2327                   search-key
2328                   (elmo-date-get-description
2329                    (elmo-date-get-datevec
2330                     (elmo-filter-value filter)))))
2331                 'search)))
2332         (setq set-list (cdr set-list)
2333               end (null set-list)))
2334       results)
2335      (t
2336       (setq charset
2337             (if (eq (length (elmo-filter-value filter)) 0)
2338                 (setq charset 'us-ascii)
2339               (elmo-imap4-detect-search-charset
2340                (elmo-filter-value filter)))
2341             set-list (elmo-imap4-make-number-set-list
2342                       from-msgs
2343                       elmo-imap4-number-set-chop-length)
2344             end nil)
2345       (while (not end)
2346         (setq results
2347               (append
2348                results
2349                (elmo-imap4-response-value
2350                 (elmo-imap4-send-command-wait
2351                  session
2352                  (list
2353                   (if elmo-imap4-use-uid "uid ")
2354                   "search "
2355                   "CHARSET "
2356                   (elmo-imap4-astring
2357                    (symbol-name charset))
2358                   " "
2359                   (if from-msgs
2360                       (concat
2361                        (if elmo-imap4-use-uid "uid ")
2362                        (cdr (car set-list))
2363                        " ")
2364                     "")
2365                   (if (eq (elmo-filter-type filter)
2366                           'unmatch)
2367                       "not " "")
2368                   (format "%s%s "
2369                           (if (member
2370                                (elmo-filter-key filter)
2371                                imap-search-keys)
2372                               ""
2373                             "header ")
2374                           (elmo-filter-key filter))
2375                   (elmo-imap4-astring
2376                    (encode-mime-charset-string
2377                     (elmo-filter-value filter) charset))))
2378                 'search)))
2379         (setq set-list (cdr set-list)
2380               end (null set-list)))
2381       results))))
2382
2383 (defun elmo-imap4-search-internal (folder session condition from-msgs)
2384   (let (result)
2385     (cond
2386      ((vectorp condition)
2387       (setq result (elmo-imap4-search-internal-primitive
2388                     folder session condition from-msgs)))
2389      ((eq (car condition) 'and)
2390       (setq result (elmo-imap4-search-internal folder session (nth 1 condition)
2391                                                from-msgs)
2392             result (elmo-list-filter result
2393                                      (elmo-imap4-search-internal
2394                                       folder session (nth 2 condition)
2395                                       from-msgs))))
2396      ((eq (car condition) 'or)
2397       (setq result (elmo-imap4-search-internal
2398                     folder session (nth 1 condition) from-msgs)
2399             result (elmo-uniq-list
2400                     (nconc result
2401                            (elmo-imap4-search-internal
2402                             folder session (nth 2 condition) from-msgs)))
2403             result (sort result '<))))))
2404
2405 (luna-define-method elmo-folder-search :around ((folder elmo-imap4-folder)
2406                                                 condition &optional numbers)
2407   (if (elmo-folder-plugged-p folder)
2408       (save-excursion
2409         (let ((session (elmo-imap4-get-session folder))
2410               ret)
2411           (message "Searching...")
2412           (elmo-imap4-session-select-mailbox
2413            session
2414            (elmo-imap4-folder-mailbox-internal folder))
2415           (setq ret (elmo-imap4-search-internal folder session condition numbers))
2416           (message "Searching...done")
2417           ret))
2418     (luna-call-next-method)))
2419
2420 (luna-define-method elmo-folder-msgdb-create-plugged
2421   ((folder elmo-imap4-folder) numbers flag-table)
2422   (when numbers
2423     (let ((session (elmo-imap4-get-session folder))
2424           (headers
2425            (elmo-uniq-list
2426             (append
2427              '("Subject" "From" "To" "Cc" "Date"
2428                "Message-Id" "References" "In-Reply-To")
2429              (mapcar #'capitalize (elmo-msgdb-extra-fields 'non-virtual)))))
2430           (total 0)
2431           print-length print-depth
2432           rfc2060 set-list)
2433       (setq rfc2060 (elmo-imap4-session-capable-p session 'imap4rev1))
2434       (elmo-with-progress-display (elmo-folder-msgdb-create (length numbers))
2435           "Creating msgdb"
2436         (elmo-imap4-session-select-mailbox
2437          session (elmo-imap4-folder-mailbox-internal folder))
2438         (setq set-list (elmo-imap4-make-number-set-list
2439                         numbers
2440                         elmo-imap4-overview-fetch-chop-length))
2441         ;; Setup callback.
2442         (with-current-buffer (elmo-network-session-buffer session)
2443           (setq elmo-imap4-current-msgdb (elmo-make-msgdb)
2444                 elmo-imap4-seen-messages nil
2445                 elmo-imap4-fetch-callback 'elmo-imap4-fetch-callback-1
2446                 elmo-imap4-fetch-callback-data (cons flag-table folder))
2447           (while set-list
2448             (elmo-imap4-send-command-wait
2449              session
2450              ;; get overview entity from IMAP4
2451              (format "%sfetch %s (%s rfc822.size flags)"
2452                      (if elmo-imap4-use-uid "uid " "")
2453                      (cdr (car set-list))
2454                      (if rfc2060
2455                          (format "body.peek[header.fields %s]" headers)
2456                        (format "%s" headers))))
2457             (setq set-list (cdr set-list)))
2458           (when elmo-imap4-seen-messages
2459             (elmo-imap4-set-flag folder elmo-imap4-seen-messages "\\Seen"))
2460           ;; cannot setup the global flag while retrieval.
2461           (dolist (number (elmo-msgdb-list-messages elmo-imap4-current-msgdb))
2462             (elmo-global-flags-set (elmo-msgdb-flags elmo-imap4-current-msgdb
2463                                                      number)
2464                                    folder number
2465                                    (elmo-message-entity-field
2466                                     (elmo-msgdb-message-entity
2467                                      elmo-imap4-current-msgdb number)
2468                                     'message-id)))
2469           elmo-imap4-current-msgdb)))))
2470
2471 (luna-define-method elmo-folder-set-flag-plugged ((folder elmo-imap4-folder)
2472                                                   numbers flag)
2473   (let ((spec (cdr (assq flag elmo-imap4-flag-specs))))
2474     (elmo-imap4-set-flag folder numbers (or (car spec)
2475                                             (capitalize (symbol-name flag)))
2476                          (nth 1 spec))))
2477
2478 (luna-define-method elmo-folder-unset-flag-plugged ((folder elmo-imap4-folder)
2479                                                     numbers flag)
2480   (let ((spec (cdr (assq flag elmo-imap4-flag-specs))))
2481     (elmo-imap4-set-flag folder numbers (or (car spec)
2482                                             (capitalize (symbol-name flag)))
2483                          (not (nth 1 spec)))))
2484
2485 (luna-define-method elmo-message-use-cache-p ((folder elmo-imap4-folder)
2486                                               number)
2487   elmo-imap4-use-cache)
2488
2489 (luna-define-method elmo-folder-message-appendable-p ((folder elmo-imap4-folder))
2490   (if (elmo-folder-plugged-p folder)
2491       (not (elmo-imap4-session-read-only-internal
2492             (elmo-imap4-get-session folder)))
2493     elmo-enable-disconnected-operation)) ; offline refile.
2494
2495 (luna-define-method elmo-folder-check-plugged ((folder elmo-imap4-folder))
2496   (let ((session (elmo-imap4-get-session folder 'if-exists)))
2497     (when session
2498       (if (string=
2499            (elmo-imap4-session-current-mailbox-internal session)
2500            (elmo-imap4-folder-mailbox-internal folder))
2501           (if elmo-imap4-use-select-to-update-status
2502               (elmo-imap4-session-select-mailbox
2503                session
2504                (elmo-imap4-folder-mailbox-internal folder)
2505                'force)
2506             (elmo-imap4-session-check session))))))
2507
2508 (defsubst elmo-imap4-folder-diff-plugged (folder)
2509   (let ((session (elmo-imap4-get-session folder))
2510         messages new unread response killed uidnext)
2511 ;;;    (elmo-imap4-commit spec)
2512     (with-current-buffer (elmo-network-session-buffer session)
2513       (setq elmo-imap4-status-callback nil)
2514       (setq elmo-imap4-status-callback-data nil))
2515     (if elmo-imap4-use-select-to-update-status
2516         (elmo-imap4-session-select-mailbox
2517          session
2518          (elmo-imap4-folder-mailbox-internal folder)))
2519     (setq response
2520           (elmo-imap4-send-command-wait session
2521                                         (list
2522                                          "status "
2523                                          (elmo-imap4-mailbox
2524                                           (elmo-imap4-folder-mailbox-internal
2525                                            folder))
2526                                          " (recent unseen messages uidnext)")))
2527     (setq response (elmo-imap4-response-value response 'status))
2528     (setq messages (elmo-imap4-response-value response 'messages))
2529     (setq uidnext (elmo-imap4-response-value response 'uidnext))
2530     (setq killed (elmo-msgdb-killed-list-load (elmo-folder-msgdb-path folder)))
2531     ;;
2532     (when killed
2533       (when (and (consp (car killed))
2534                  (eq (car (car killed)) 1))
2535         (setq messages (- uidnext (cdr (car killed)) 1)))
2536       (setq messages (- messages
2537                         (elmo-msgdb-killed-list-length (cdr killed)))))
2538     (setq new (elmo-imap4-response-value response 'recent)
2539           unread (elmo-imap4-response-value response 'unseen))
2540     (if (< unread new) (setq new unread))
2541     (list new unread messages)))
2542
2543 (luna-define-method elmo-folder-diff-plugged ((folder elmo-imap4-folder))
2544   (elmo-imap4-folder-diff-plugged folder))
2545
2546 (luna-define-method elmo-folder-diff-async ((folder elmo-imap4-folder))
2547   (setq elmo-imap4-server-diff-async-callback
2548         elmo-folder-diff-async-callback)
2549   (setq elmo-imap4-server-diff-async-callback-data
2550         elmo-folder-diff-async-callback-data)
2551   (elmo-imap4-server-diff-async folder))
2552
2553 (luna-define-method elmo-folder-open :around ((folder elmo-imap4-folder)
2554                                               &optional load-msgdb)
2555   (if (elmo-folder-plugged-p folder)
2556       (let (session mailbox msgdb result response tag)
2557         (condition-case err
2558             (progn
2559               (setq session (elmo-imap4-get-session folder)
2560                     mailbox (elmo-imap4-folder-mailbox-internal folder)
2561                     tag (elmo-imap4-send-command session
2562                                                  (list "select "
2563                                                        (elmo-imap4-mailbox
2564                                                         mailbox))))
2565               (message "Selecting %s..."
2566                        (elmo-folder-name-internal folder))
2567               (if load-msgdb
2568                   (setq msgdb (elmo-folder-msgdb-load folder 'silent)))
2569               (elmo-folder-set-killed-list-internal
2570                folder
2571                (elmo-msgdb-killed-list-load (elmo-folder-msgdb-path folder)))
2572               (if (setq result (elmo-imap4-response-ok-p
2573                                 (setq response
2574                                       (elmo-imap4-read-response session tag))))
2575                   (progn
2576                     (let ((exists (assq 'exists response))) ; update message count,
2577                       (when exists                          ; so merge update can go
2578                         (elmo-folder-set-info-hashtb folder nil (cadr exists))))
2579                     (elmo-imap4-session-set-current-mailbox-internal
2580                      session mailbox)
2581                     (elmo-imap4-session-set-read-only-internal
2582                      session
2583                      (nth 1 (assq 'read-only (assq 'ok response))))
2584                     (elmo-imap4-session-set-flags-internal
2585                      session
2586                      (nth 1 (or (assq 'permanentflags response)
2587                                 (assq 'flags response)))))
2588                 (elmo-imap4-session-set-current-mailbox-internal session nil)
2589                 (if (elmo-imap4-response-bye-p response)
2590                     (elmo-imap4-process-bye session)
2591                   (error "%s"
2592                          (or (elmo-imap4-response-error-text response)
2593                              (format "Select %s failed" mailbox)))))
2594               (message "Selecting %s...done"
2595                        (elmo-folder-name-internal folder))
2596               (elmo-folder-set-msgdb-internal
2597                folder msgdb))
2598           (quit
2599            (if (elmo-imap4-response-ok-p response)
2600                (elmo-imap4-session-set-current-mailbox-internal
2601                 session mailbox)
2602              (and session
2603                   (elmo-imap4-session-set-current-mailbox-internal
2604                    session nil))))
2605           (error
2606            (if (elmo-imap4-response-ok-p response)
2607                (elmo-imap4-session-set-current-mailbox-internal
2608                 session mailbox)
2609              (and session
2610                   (elmo-imap4-session-set-current-mailbox-internal
2611                    session nil))))))
2612     (luna-call-next-method)))
2613
2614 ;; elmo-folder-open-internal: do nothing.
2615
2616 (luna-define-method elmo-find-fetch-strategy ((folder elmo-imap4-folder) number
2617                                               &optional
2618                                               ignore-cache
2619                                               require-entireness)
2620   (let ((entity (elmo-message-entity folder number)))
2621     (if (null entity)
2622         (elmo-make-fetch-strategy 'entire)
2623       (let* ((size (elmo-message-entity-field entity 'size))
2624              (message-id (elmo-message-entity-field entity 'message-id))
2625              (cache-file (elmo-file-cache-get message-id))
2626              (use-cache (and (not ignore-cache)
2627                              (elmo-message-use-cache-p folder number)
2628                              (if require-entireness
2629                                  (eq (elmo-file-cache-status cache-file)
2630                                      'entire)
2631                                (elmo-file-cache-status cache-file)))))
2632         (elmo-make-fetch-strategy
2633          (if use-cache
2634              (elmo-file-cache-status cache-file)
2635            (if (and (not require-entireness)
2636                     elmo-message-fetch-threshold
2637                     (integerp size)
2638                     (>= size elmo-message-fetch-threshold)
2639                     (or (not elmo-message-fetch-confirm)
2640                         (not (prog1
2641                                  (y-or-n-p
2642                                   (format
2643                                    "Fetch entire message at once? (%dbytes)"
2644                                    size))
2645                                (message "")))))
2646                'section
2647              'entire))
2648          use-cache
2649          (elmo-message-use-cache-p folder number)
2650          (elmo-file-cache-path cache-file))))))
2651
2652 (luna-define-method elmo-folder-create-plugged ((folder elmo-imap4-folder))
2653   (elmo-imap4-send-command-wait
2654    (elmo-imap4-get-session folder)
2655    (list "create "
2656          (elmo-imap4-mailbox
2657           (elmo-imap4-folder-mailbox-internal folder)))))
2658
2659 (defun elmo-imap4-flags-to-imap (flags)
2660   "Convert FLAGS to the IMAP flag string."
2661   (let ((imap-flag (if (not (memq 'unread flags)) "\\Seen")))
2662     (dolist (flag flags)
2663       (unless (memq flag '(new read unread cached))
2664         (setq imap-flag
2665               (concat imap-flag
2666                       (if imap-flag " ")
2667                       (or (car (cdr (assq flag elmo-imap4-flag-specs)))
2668                           (capitalize (symbol-name flag)))))))
2669     imap-flag))
2670
2671 (luna-define-method elmo-folder-append-buffer
2672   ((folder elmo-imap4-folder) &optional flags number)
2673   (if (elmo-folder-plugged-p folder)
2674       (let ((session (elmo-imap4-get-session folder))
2675             send-buffer result)
2676         (elmo-imap4-session-select-mailbox session
2677                                            (elmo-imap4-folder-mailbox-internal
2678                                             folder))
2679         (setq send-buffer (elmo-imap4-setup-send-buffer))
2680         (unwind-protect
2681             (setq result
2682                   (elmo-imap4-send-command-wait
2683                    session
2684                    (list
2685                     "append "
2686                     (elmo-imap4-mailbox (elmo-imap4-folder-mailbox-internal
2687                                          folder))
2688                     (if (and flags (elmo-folder-use-flag-p folder))
2689                         (concat " (" (elmo-imap4-flags-to-imap flags) ") ")
2690                       " () ")
2691                     (elmo-imap4-buffer-literal send-buffer))))
2692           (kill-buffer send-buffer))
2693         (when result
2694           (elmo-folder-preserve-flags
2695            folder (elmo-msgdb-get-message-id-from-buffer) flags))
2696         result)
2697     ;; Unplugged
2698     (if elmo-enable-disconnected-operation
2699         (elmo-folder-append-buffer-dop folder flags number)
2700       (error "Unplugged"))))
2701
2702 (eval-when-compile
2703   (defmacro elmo-imap4-identical-system-p (folder1 folder2)
2704     "Return t if FOLDER1 and FOLDER2 are in the same IMAP4 system."
2705     `(and (string= (elmo-net-folder-server-internal ,folder1)
2706                    (elmo-net-folder-server-internal ,folder2))
2707           (eq (elmo-net-folder-port-internal ,folder1)
2708               (elmo-net-folder-port-internal ,folder2))
2709           (string= (elmo-net-folder-user-internal ,folder1)
2710                    (elmo-net-folder-user-internal ,folder2)))))
2711
2712 (luna-define-method elmo-folder-next-message-number-plugged
2713   ((folder elmo-imap4-folder))
2714   (let ((session (elmo-imap4-get-session folder))
2715         messages new unread response killed uidnext)
2716     (with-current-buffer (elmo-network-session-buffer session)
2717       (setq elmo-imap4-status-callback nil)
2718       (setq elmo-imap4-status-callback-data nil))
2719     (if elmo-imap4-use-select-to-update-status
2720         (elmo-imap4-session-select-mailbox
2721          session
2722          (elmo-imap4-folder-mailbox-internal folder)))
2723     (setq response
2724           (elmo-imap4-send-command-wait session
2725                                         (list
2726                                          "status "
2727                                          (elmo-imap4-mailbox
2728                                           (elmo-imap4-folder-mailbox-internal
2729                                            folder))
2730                                          " (uidnext)"))
2731           response (elmo-imap4-response-value response 'status))
2732     (elmo-imap4-response-value response 'uidnext)))
2733
2734 (defun elmo-folder-append-messages-imap4-imap4 (dst-folder
2735                                                 src-folder
2736                                                 numbers
2737                                                 same-number)
2738   (if (and (elmo-imap4-identical-system-p dst-folder src-folder)
2739            (elmo-folder-plugged-p dst-folder))
2740       ;; Plugged
2741       (prog1
2742           (elmo-imap4-copy-messages src-folder dst-folder numbers)
2743         (elmo-progress-notify 'elmo-folder-move-messages (length numbers)))
2744     (elmo-folder-append-messages dst-folder src-folder numbers same-number
2745                                  'elmo-folder-append-messages-imap4-imap4)))
2746
2747 (luna-define-method elmo-message-deletable-p ((folder elmo-imap4-folder)
2748                                               number)
2749   (if (elmo-folder-plugged-p folder)
2750       (not (elmo-imap4-session-read-only-internal
2751             (elmo-imap4-get-session folder)))
2752     elmo-enable-disconnected-operation)) ; offline refile.
2753
2754 ;;;(luna-define-method elmo-message-fetch-unplugged
2755 ;;;  ((folder elmo-imap4-folder)
2756 ;;;   number strategy  &optional section outbuf unseen)
2757 ;;;  (error "%d%s is not cached." number (if section
2758 ;;;                                       (format "(%s)" section)
2759 ;;;                                     "")))
2760
2761 (defsubst elmo-imap4-message-fetch (folder number strategy
2762                                            section outbuf unseen)
2763   (let ((session (elmo-imap4-get-session folder))
2764         response)
2765     (elmo-imap4-session-select-mailbox session
2766                                        (elmo-imap4-folder-mailbox-internal
2767                                         folder))
2768     (with-current-buffer (elmo-network-session-buffer session)
2769       (setq elmo-imap4-fetch-callback nil)
2770       (setq elmo-imap4-fetch-callback-data nil))
2771     (elmo-with-progress-display (elmo-retrieve-message
2772                                  (elmo-message-field folder number :size)
2773                                  elmo-imap4-literal-progress-reporter)
2774         "Retrieving"
2775       (setq response
2776             (elmo-imap4-send-command-wait session
2777                                           (format
2778                                            (if elmo-imap4-use-uid
2779                                                "uid fetch %s body%s[%s]"
2780                                              "fetch %s body%s[%s]")
2781                                            number
2782                                            (if unseen ".peek" "")
2783                                            (or section "")))))
2784     (if (setq response (elmo-imap4-response-bodydetail-text
2785                         (elmo-imap4-response-value-all
2786                          response 'fetch)))
2787         (with-current-buffer outbuf
2788           (erase-buffer)
2789           (insert response)
2790           (elmo-delete-cr-buffer)
2791           t))))
2792
2793 (luna-define-method elmo-message-fetch-plugged ((folder elmo-imap4-folder)
2794                                                 number strategy
2795                                                 &optional section
2796                                                 outbuf unseen)
2797   (when elmo-imap4-set-seen-flag-explicitly
2798     (elmo-imap4-set-flag folder (list number) "\\Seen"))
2799   (elmo-imap4-message-fetch folder number strategy section outbuf unseen))
2800
2801 (luna-define-method elmo-message-fetch-field ((folder elmo-imap4-folder)
2802                                               number field)
2803   (let ((session (elmo-imap4-get-session folder)))
2804     (elmo-imap4-session-select-mailbox session
2805                                        (elmo-imap4-folder-mailbox-internal
2806                                         folder))
2807     (with-current-buffer (elmo-network-session-buffer session)
2808       (setq elmo-imap4-fetch-callback nil)
2809       (setq elmo-imap4-fetch-callback-data nil))
2810     (with-temp-buffer
2811       (insert
2812        (elmo-imap4-response-bodydetail-text
2813         (elmo-imap4-response-value
2814          (elmo-imap4-send-command-wait session
2815                                        (concat
2816                                         (if elmo-imap4-use-uid
2817                                             "uid ")
2818                                         (format
2819                                          "fetch %s (body.peek[header.fields (%s)])"
2820                                          number field)))
2821          'fetch)))
2822       (elmo-delete-cr-buffer)
2823       (goto-char (point-min))
2824       (std11-field-body (symbol-name field)))))
2825
2826 (luna-define-method elmo-folder-search-requires-msgdb-p ((folder
2827                                                           elmo-imap4-folder)
2828                                                          condition)
2829   nil)
2830
2831 (autoload 'elmo-global-flags-set "elmo-flag")
2832 (autoload 'elmo-get-global-flags "elmo-flag")
2833
2834 (require 'product)
2835 (product-provide (provide 'elmo-imap4) (require 'elmo-version))
2836
2837 ;;; elmo-imap4.el ends here