| 1 | ;;; nntp.el --- nntp access for Gnus |
| 2 | ;; Copyright (C) 1987,88,89,90,92,93,94,95,96 Free Software Foundation, Inc. |
| 3 | |
| 4 | ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet> |
| 5 | ;; Lars Magne Ingebrigtsen <larsi@ifi.uio.no> |
| 6 | ;; Keywords: news |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 13 | ;; any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | ;; Boston, MA 02111-1307, USA. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;;; Code: |
| 28 | |
| 29 | (require 'nnheader) |
| 30 | (require 'nnoo) |
| 31 | (eval-when-compile (require 'cl)) |
| 32 | |
| 33 | (nnoo-declare nntp) |
| 34 | |
| 35 | (eval-and-compile |
| 36 | (unless (fboundp 'open-network-stream) |
| 37 | (require 'tcp))) |
| 38 | |
| 39 | (eval-when-compile (require 'cl)) |
| 40 | |
| 41 | (eval-and-compile |
| 42 | (autoload 'cancel-timer "timer") |
| 43 | (autoload 'telnet "telnet" nil t) |
| 44 | (autoload 'telnet-send-input "telnet" nil t) |
| 45 | (autoload 'timezone-parse-date "timezone")) |
| 46 | |
| 47 | (defvoo nntp-server-hook nil |
| 48 | "*Hooks for the NNTP server. |
| 49 | If the kanji code of the NNTP server is different from the local kanji |
| 50 | code, the correct kanji code of the buffer associated with the NNTP |
| 51 | server must be specified as follows: |
| 52 | |
| 53 | \(setq nntp-server-hook |
| 54 | (function |
| 55 | (lambda () |
| 56 | ;; Server's Kanji code is EUC (NEmacs hack). |
| 57 | (make-local-variable 'kanji-fileio-code) |
| 58 | (setq kanji-fileio-code 0)))) |
| 59 | |
| 60 | If you'd like to change something depending on the server in this |
| 61 | hook, use the variable `nntp-address'.") |
| 62 | |
| 63 | (defvoo nntp-server-opened-hook '(nntp-send-mode-reader) |
| 64 | "*Hook used for sending commands to the server at startup. |
| 65 | The default value is `nntp-send-mode-reader', which makes an innd |
| 66 | server spawn an nnrpd server. Another useful function to put in this |
| 67 | hook might be `nntp-send-authinfo', which will prompt for a password |
| 68 | to allow posting from the server. Note that this is only necessary to |
| 69 | do on servers that use strict access control.") |
| 70 | (add-hook 'nntp-server-opened-hook 'nntp-send-mode-reader) |
| 71 | |
| 72 | (defvoo nntp-server-action-alist |
| 73 | '(("nntpd 1\\.5\\.11t" |
| 74 | (remove-hook 'nntp-server-opened-hook 'nntp-send-mode-reader))) |
| 75 | "Alist of regexps to match on server types and actions to be taken. |
| 76 | For instance, if you want Gnus to beep every time you connect |
| 77 | to innd, you could say something like: |
| 78 | |
| 79 | \(setq nntp-server-action-alist |
| 80 | '((\"innd\" (ding)))) |
| 81 | |
| 82 | You probably don't want to do that, though.") |
| 83 | |
| 84 | (defvoo nntp-open-server-function 'nntp-open-network-stream |
| 85 | "*Function used for connecting to a remote system. |
| 86 | It will be called with the address of the remote system. |
| 87 | |
| 88 | Two pre-made functions are `nntp-open-network-stream', which is the |
| 89 | default, and simply connects to some port or other on the remote |
| 90 | system (see nntp-port-number). The other is `nntp-open-rlogin', which |
| 91 | does an rlogin on the remote system, and then does a telnet to the |
| 92 | NNTP server available there (see nntp-rlogin-parameters).") |
| 93 | |
| 94 | (defvoo nntp-rlogin-parameters '("telnet" "${NNTPSERVER:=localhost}" "nntp") |
| 95 | "*Parameters to `nntp-open-login'. |
| 96 | That function may be used as `nntp-open-server-function'. In that |
| 97 | case, this list will be used as the parameter list given to rsh.") |
| 98 | |
| 99 | (defvoo nntp-rlogin-user-name nil |
| 100 | "*User name on remote system when using the rlogin connect method.") |
| 101 | |
| 102 | (defvoo nntp-address nil |
| 103 | "*The name of the NNTP server.") |
| 104 | |
| 105 | (defvoo nntp-port-number "nntp" |
| 106 | "*Port number to connect to.") |
| 107 | |
| 108 | (defvoo nntp-end-of-line "\r\n" |
| 109 | "String to use on the end of lines when talking to the NNTP server. |
| 110 | This is \"\\r\\n\" by default, but should be \"\\n\" when |
| 111 | using rlogin to communicate with the server.") |
| 112 | |
| 113 | (defvoo nntp-large-newsgroup 50 |
| 114 | "*The number of the articles which indicates a large newsgroup. |
| 115 | If the number of the articles is greater than the value, verbose |
| 116 | messages will be shown to indicate the current status.") |
| 117 | |
| 118 | (defvoo nntp-buggy-select (memq system-type '(fujitsu-uts)) |
| 119 | "*t if your select routine is buggy. |
| 120 | If the select routine signals error or fall into infinite loop while |
| 121 | waiting for the server response, the variable must be set to t. In |
| 122 | case of Fujitsu UTS, it is set to T since `accept-process-output' |
| 123 | doesn't work properly.") |
| 124 | |
| 125 | (defvoo nntp-maximum-request 400 |
| 126 | "*The maximum number of the requests sent to the NNTP server at one time. |
| 127 | If Emacs hangs up while retrieving headers, set the variable to a |
| 128 | lower value.") |
| 129 | |
| 130 | (defvoo nntp-debug-read 10000 |
| 131 | "*Display '...' every 10Kbytes of a message being received if it is non-nil. |
| 132 | If it is a number, dots are displayed per the number.") |
| 133 | |
| 134 | (defvoo nntp-nov-is-evil nil |
| 135 | "*If non-nil, nntp will never attempt to use XOVER when talking to the server.") |
| 136 | |
| 137 | (defvoo nntp-xover-commands '("XOVER" "XOVERVIEW") |
| 138 | "*List of strings that are used as commands to fetch NOV lines from a server. |
| 139 | The strings are tried in turn until a positive response is gotten. If |
| 140 | none of the commands are successful, nntp will just grab headers one |
| 141 | by one.") |
| 142 | |
| 143 | (defvoo nntp-nov-gap 20 |
| 144 | "*Maximum allowed gap between two articles. |
| 145 | If the gap between two consecutive articles is bigger than this |
| 146 | variable, split the XOVER request into two requests.") |
| 147 | |
| 148 | (defvoo nntp-connection-timeout nil |
| 149 | "*Number of seconds to wait before an nntp connection times out. |
| 150 | If this variable is nil, which is the default, no timers are set.") |
| 151 | |
| 152 | (defvoo nntp-command-timeout nil |
| 153 | "*Number of seconds to wait for a response when sending a command. |
| 154 | If this variable is nil, which is the default, no timers are set.") |
| 155 | |
| 156 | (defvoo nntp-retry-on-break nil |
| 157 | "*If non-nil, re-send the command when the user types `C-g'.") |
| 158 | |
| 159 | (defvoo nntp-news-default-headers nil |
| 160 | "*If non-nil, override `mail-default-headers' when posting news.") |
| 161 | |
| 162 | (defvoo nntp-prepare-server-hook nil |
| 163 | "*Hook run before a server is opened. |
| 164 | If can be used to set up a server remotely, for instance. Say you |
| 165 | have an account at the machine \"other.machine\". This machine has |
| 166 | access to an NNTP server that you can't access locally. You could |
| 167 | then use this hook to rsh to the remote machine and start a proxy NNTP |
| 168 | server there that you can connect to.") |
| 169 | |
| 170 | (defvoo nntp-async-number 5 |
| 171 | "*How many articles should be prefetched when in asynchronous mode.") |
| 172 | |
| 173 | (defvoo nntp-warn-about-losing-connection t |
| 174 | "*If non-nil, beep when a server closes connection.") |
| 175 | |
| 176 | \f |
| 177 | |
| 178 | (defconst nntp-version "nntp 4.0" |
| 179 | "Version numbers of this version of NNTP.") |
| 180 | |
| 181 | (defvar nntp-server-buffer nil |
| 182 | "Buffer associated with the NNTP server process.") |
| 183 | |
| 184 | (defvoo nntp-server-process nil |
| 185 | "The NNTP server process. |
| 186 | You'd better not use this variable in NNTP front-end program, but |
| 187 | instead use `nntp-server-buffer'.") |
| 188 | |
| 189 | (defvoo nntp-status-string nil |
| 190 | "Save the server response message.") |
| 191 | |
| 192 | (defvar nntp-opened-connections nil |
| 193 | "All (possibly) opened connections.") |
| 194 | |
| 195 | (defvoo nntp-server-xover 'try) |
| 196 | (defvoo nntp-server-list-active-group 'try) |
| 197 | (defvoo nntp-current-group "") |
| 198 | (defvoo nntp-server-type nil) |
| 199 | |
| 200 | (defvoo nntp-async-process nil) |
| 201 | (defvoo nntp-async-buffer nil) |
| 202 | (defvoo nntp-async-articles nil) |
| 203 | (defvoo nntp-async-fetched nil) |
| 204 | (defvoo nntp-async-group-alist nil) |
| 205 | |
| 206 | \f |
| 207 | ;;; Interface functions. |
| 208 | |
| 209 | (nnoo-define-basics nntp) |
| 210 | |
| 211 | (deffoo nntp-retrieve-headers (articles &optional group server fetch-old) |
| 212 | "Retrieve the headers of ARTICLES." |
| 213 | (nntp-possibly-change-server group server) |
| 214 | (save-excursion |
| 215 | (set-buffer nntp-server-buffer) |
| 216 | (erase-buffer) |
| 217 | (if (and (not gnus-nov-is-evil) |
| 218 | (not nntp-nov-is-evil) |
| 219 | (nntp-retrieve-headers-with-xover articles fetch-old)) |
| 220 | ;; We successfully retrieved the headers via XOVER. |
| 221 | 'nov |
| 222 | ;; XOVER didn't work, so we do it the hard, slow and inefficient |
| 223 | ;; way. |
| 224 | (let ((number (length articles)) |
| 225 | (count 0) |
| 226 | (received 0) |
| 227 | (message-log-max nil) |
| 228 | (last-point (point-min))) |
| 229 | ;; Send HEAD command. |
| 230 | (while articles |
| 231 | (nntp-send-strings-to-server |
| 232 | "HEAD" (if (numberp (car articles)) |
| 233 | (int-to-string (car articles)) |
| 234 | ;; `articles' is either a list of article numbers |
| 235 | ;; or a list of article IDs. |
| 236 | (car articles))) |
| 237 | (setq articles (cdr articles) |
| 238 | count (1+ count)) |
| 239 | ;; Every 400 header requests we have to read the stream in |
| 240 | ;; order to avoid deadlocks. |
| 241 | (when (or (null articles) ;All requests have been sent. |
| 242 | (zerop (% count nntp-maximum-request))) |
| 243 | (nntp-accept-response) |
| 244 | (while (progn |
| 245 | (goto-char last-point) |
| 246 | ;; Count replies. |
| 247 | (while (re-search-forward "^[0-9]" nil t) |
| 248 | (setq received (1+ received))) |
| 249 | (setq last-point (point)) |
| 250 | (< received count)) |
| 251 | ;; If number of headers is greater than 100, give |
| 252 | ;; informative messages. |
| 253 | (and (numberp nntp-large-newsgroup) |
| 254 | (> number nntp-large-newsgroup) |
| 255 | (zerop (% received 20)) |
| 256 | (nnheader-message 7 "NNTP: Receiving headers... %d%%" |
| 257 | (/ (* received 100) number))) |
| 258 | (nntp-accept-response)))) |
| 259 | ;; Wait for text of last command. |
| 260 | (goto-char (point-max)) |
| 261 | (re-search-backward "^[0-9]" nil t) |
| 262 | (when (looking-at "^[23]") |
| 263 | (while (progn |
| 264 | (goto-char (- (point-max) 3)) |
| 265 | (not (looking-at "^\\.\r?\n"))) |
| 266 | (nntp-accept-response))) |
| 267 | (and (numberp nntp-large-newsgroup) |
| 268 | (> number nntp-large-newsgroup) |
| 269 | (nnheader-message 7 "NNTP: Receiving headers...done")) |
| 270 | |
| 271 | ;; Now all of replies are received. Fold continuation lines. |
| 272 | (nnheader-fold-continuation-lines) |
| 273 | ;; Remove all "\r"'s. |
| 274 | (goto-char (point-min)) |
| 275 | (while (search-forward "\r" nil t) |
| 276 | (replace-match "" t t)) |
| 277 | 'headers)))) |
| 278 | |
| 279 | |
| 280 | (deffoo nntp-retrieve-groups (groups &optional server) |
| 281 | "Retrieve group info on GROUPS." |
| 282 | (nntp-possibly-change-server nil server) |
| 283 | (save-excursion |
| 284 | (set-buffer nntp-server-buffer) |
| 285 | ;; The first time this is run, this variable is `try'. So we |
| 286 | ;; try. |
| 287 | (when (eq nntp-server-list-active-group 'try) |
| 288 | (nntp-try-list-active (car groups))) |
| 289 | (erase-buffer) |
| 290 | (let ((count 0) |
| 291 | (received 0) |
| 292 | (last-point (point-min)) |
| 293 | (command (if nntp-server-list-active-group "LIST ACTIVE" "GROUP"))) |
| 294 | (while groups |
| 295 | ;; Send the command to the server. |
| 296 | (nntp-send-strings-to-server command (car groups)) |
| 297 | (setq groups (cdr groups)) |
| 298 | (setq count (1+ count)) |
| 299 | ;; Every 400 requests we have to read the stream in |
| 300 | ;; order to avoid deadlocks. |
| 301 | (when (or (null groups) ;All requests have been sent. |
| 302 | (zerop (% count nntp-maximum-request))) |
| 303 | (nntp-accept-response) |
| 304 | (while (progn |
| 305 | (goto-char last-point) |
| 306 | ;; Count replies. |
| 307 | (while (re-search-forward "^[0-9]" nil t) |
| 308 | (setq received (1+ received))) |
| 309 | (setq last-point (point)) |
| 310 | (< received count)) |
| 311 | (nntp-accept-response)))) |
| 312 | |
| 313 | ;; Wait for the reply from the final command. |
| 314 | (when nntp-server-list-active-group |
| 315 | (goto-char (point-max)) |
| 316 | (re-search-backward "^[0-9]" nil t) |
| 317 | (when (looking-at "^[23]") |
| 318 | (while (progn |
| 319 | (goto-char (- (point-max) 3)) |
| 320 | (not (looking-at "^\\.\r?\n"))) |
| 321 | (nntp-accept-response)))) |
| 322 | |
| 323 | ;; Now all replies are received. We remove CRs. |
| 324 | (goto-char (point-min)) |
| 325 | (while (search-forward "\r" nil t) |
| 326 | (replace-match "" t t)) |
| 327 | |
| 328 | (if (not nntp-server-list-active-group) |
| 329 | 'group |
| 330 | ;; We have read active entries, so we just delete the |
| 331 | ;; superfluos gunk. |
| 332 | (goto-char (point-min)) |
| 333 | (while (re-search-forward "^[.2-5]" nil t) |
| 334 | (delete-region (match-beginning 0) |
| 335 | (progn (forward-line 1) (point)))) |
| 336 | 'active)))) |
| 337 | |
| 338 | (deffoo nntp-open-server (server &optional defs connectionless) |
| 339 | "Open the virtual server SERVER. |
| 340 | If CONNECTIONLESS is non-nil, don't attempt to connect to any physical |
| 341 | servers." |
| 342 | ;; Called with just a port number as the defs. |
| 343 | (when (or (stringp (car defs)) |
| 344 | (numberp (car defs))) |
| 345 | (setq defs `((nntp-port-number ,(car defs))))) |
| 346 | (unless (assq 'nntp-address defs) |
| 347 | (setq defs (append defs `((nntp-address ,server))))) |
| 348 | (nnoo-change-server 'nntp server defs) |
| 349 | (if (nntp-server-opened server) |
| 350 | t |
| 351 | (or (nntp-server-opened server) |
| 352 | connectionless |
| 353 | (prog2 |
| 354 | (run-hooks 'nntp-prepare-server-hook) |
| 355 | (nntp-open-server-semi-internal nntp-address nntp-port-number) |
| 356 | (nnheader-insert ""))))) |
| 357 | |
| 358 | (deffoo nntp-close-server (&optional server) |
| 359 | "Close connection to SERVER." |
| 360 | (nntp-possibly-change-server nil server t) |
| 361 | (unwind-protect |
| 362 | (progn |
| 363 | ;; Un-set default sentinel function before closing connection. |
| 364 | (and nntp-server-process |
| 365 | (eq 'nntp-default-sentinel |
| 366 | (process-sentinel nntp-server-process)) |
| 367 | (set-process-sentinel nntp-server-process nil)) |
| 368 | ;; We cannot send QUIT command unless the process is running. |
| 369 | (when (nntp-server-opened server) |
| 370 | (nntp-send-command nil "QUIT") |
| 371 | ;; Give the QUIT time to arrive. |
| 372 | (sleep-for 1))) |
| 373 | (nntp-close-server-internal server))) |
| 374 | |
| 375 | (deffoo nntp-request-close () |
| 376 | "Close all server connections." |
| 377 | (let (proc) |
| 378 | (while nntp-opened-connections |
| 379 | (when (setq proc (pop nntp-opened-connections)) |
| 380 | ;; Un-set default sentinel function before closing connection. |
| 381 | (when (eq 'nntp-default-sentinel (process-sentinel proc)) |
| 382 | (set-process-sentinel proc nil)) |
| 383 | (condition-case () |
| 384 | (process-send-string proc (concat "QUIT" nntp-end-of-line)) |
| 385 | (error nil)) |
| 386 | ;; Give the QUIT time to reach the server before we close |
| 387 | ;; down the process. |
| 388 | (sleep-for 1) |
| 389 | (delete-process proc))) |
| 390 | (and nntp-async-buffer |
| 391 | (buffer-name nntp-async-buffer) |
| 392 | (kill-buffer nntp-async-buffer)) |
| 393 | (let ((alist (cddr (assq 'nntp nnoo-state-alist))) |
| 394 | entry) |
| 395 | (while (setq entry (pop alist)) |
| 396 | (and (setq proc (cdr (assq 'nntp-async-buffer entry))) |
| 397 | (buffer-name proc) |
| 398 | (kill-buffer proc)))) |
| 399 | (nnoo-close-server 'nntp) |
| 400 | (setq nntp-async-group-alist nil |
| 401 | nntp-async-articles nil))) |
| 402 | |
| 403 | (deffoo nntp-server-opened (&optional server) |
| 404 | "Say whether a connection to SERVER has been opened." |
| 405 | (and (nnoo-current-server-p 'nntp server) |
| 406 | nntp-server-buffer |
| 407 | (buffer-name nntp-server-buffer) |
| 408 | nntp-server-process |
| 409 | (memq (process-status nntp-server-process) '(open run)))) |
| 410 | |
| 411 | (deffoo nntp-status-message (&optional server) |
| 412 | "Return server status as a string." |
| 413 | (if (and nntp-status-string |
| 414 | ;; NNN MESSAGE |
| 415 | (string-match "[0-9][0-9][0-9][ \t]+\\([^\r]*\\).*$" |
| 416 | nntp-status-string)) |
| 417 | (substring nntp-status-string (match-beginning 1) (match-end 1)) |
| 418 | ;; Empty message if nothing. |
| 419 | (or nntp-status-string ""))) |
| 420 | |
| 421 | (deffoo nntp-request-article (id &optional group server buffer) |
| 422 | "Request article ID (Message-ID or number)." |
| 423 | (nntp-possibly-change-server group server) |
| 424 | |
| 425 | (let (found) |
| 426 | |
| 427 | ;; First we see whether we can get the article from the async buffer. |
| 428 | (when (and (numberp id) |
| 429 | nntp-async-articles |
| 430 | (memq id nntp-async-fetched)) |
| 431 | (save-excursion |
| 432 | (set-buffer nntp-async-buffer) |
| 433 | (let ((opoint (point)) |
| 434 | (art (if (numberp id) (int-to-string id) id)) |
| 435 | beg end) |
| 436 | (when (and (or (re-search-forward (concat "^2.. +" art) nil t) |
| 437 | (progn |
| 438 | (goto-char (point-min)) |
| 439 | (re-search-forward (concat "^2.. +" art) opoint t))) |
| 440 | (progn |
| 441 | (beginning-of-line) |
| 442 | (setq beg (point) |
| 443 | end (re-search-forward "^\\.\r?\n" nil t)))) |
| 444 | (setq found t) |
| 445 | (save-excursion |
| 446 | (set-buffer (or buffer nntp-server-buffer)) |
| 447 | (erase-buffer) |
| 448 | (insert-buffer-substring nntp-async-buffer beg end) |
| 449 | (let ((nntp-server-buffer (current-buffer))) |
| 450 | (nntp-decode-text))) |
| 451 | (delete-region beg end) |
| 452 | (when nntp-async-articles |
| 453 | (nntp-async-fetch-articles id)))))) |
| 454 | |
| 455 | (if found |
| 456 | id |
| 457 | ;; The article was not in the async buffer, so we fetch it now. |
| 458 | (unwind-protect |
| 459 | (progn |
| 460 | (if buffer (set-process-buffer nntp-server-process buffer)) |
| 461 | (let ((nntp-server-buffer (or buffer nntp-server-buffer)) |
| 462 | (art (or (and (numberp id) (int-to-string id)) id))) |
| 463 | (prog1 |
| 464 | (and (nntp-send-command |
| 465 | ;; A bit odd regexp to ensure working over rlogin. |
| 466 | "^\\.\r?\n" "ARTICLE" art) |
| 467 | (if (numberp id) |
| 468 | (cons nntp-current-group id) |
| 469 | ;; We find out what the article number was. |
| 470 | (nntp-find-group-and-number))) |
| 471 | (nntp-decode-text) |
| 472 | (and nntp-async-articles (nntp-async-fetch-articles id))))) |
| 473 | (when buffer |
| 474 | (set-process-buffer nntp-server-process nntp-server-buffer)))))) |
| 475 | |
| 476 | (deffoo nntp-request-body (id &optional group server) |
| 477 | "Request body of article ID (Message-ID or number)." |
| 478 | (nntp-possibly-change-server group server) |
| 479 | (prog1 |
| 480 | ;; If NEmacs, end of message may look like: "\256\215" (".^M") |
| 481 | (nntp-send-command |
| 482 | "^\\.\r?\n" "BODY" (or (and (numberp id) (int-to-string id)) id)) |
| 483 | (nntp-decode-text))) |
| 484 | |
| 485 | (deffoo nntp-request-head (id &optional group server) |
| 486 | "Request head of article ID (Message-ID or number)." |
| 487 | (nntp-possibly-change-server group server) |
| 488 | (prog1 |
| 489 | (when (nntp-send-command |
| 490 | "^\\.\r?\n" "HEAD" (if (numberp id) (int-to-string id) id)) |
| 491 | (if (numberp id) id |
| 492 | ;; We find out what the article number was. |
| 493 | (nntp-find-group-and-number))) |
| 494 | (nntp-decode-text) |
| 495 | (save-excursion |
| 496 | (set-buffer nntp-server-buffer) |
| 497 | (nnheader-fold-continuation-lines)))) |
| 498 | |
| 499 | (deffoo nntp-request-stat (id &optional group server) |
| 500 | "Request STAT of article ID (Message-ID or number)." |
| 501 | (nntp-possibly-change-server group server) |
| 502 | (nntp-send-command |
| 503 | "^[23].*\r?\n" "STAT" (or (and (numberp id) (int-to-string id)) id))) |
| 504 | |
| 505 | (deffoo nntp-request-type (group &optional article) |
| 506 | 'news) |
| 507 | |
| 508 | (deffoo nntp-request-group (group &optional server dont-check) |
| 509 | "Select GROUP." |
| 510 | (nntp-possibly-change-server nil server) |
| 511 | (setq nntp-current-group |
| 512 | (when (nntp-send-command "^2.*\r?\n" "GROUP" group) |
| 513 | group))) |
| 514 | |
| 515 | (deffoo nntp-request-asynchronous (group &optional server articles) |
| 516 | "Enable pre-fetch in GROUP." |
| 517 | (when nntp-async-articles |
| 518 | (nntp-async-request-group group)) |
| 519 | (when nntp-async-number |
| 520 | (if (not (or (nntp-async-server-opened) |
| 521 | (nntp-async-open-server))) |
| 522 | ;; Couldn't open the second connection |
| 523 | (progn |
| 524 | (message "Can't open second connection to %s" nntp-address) |
| 525 | (ding) |
| 526 | (setq nntp-async-articles nil) |
| 527 | (sit-for 2)) |
| 528 | ;; We opened the second connection (or it was opened already). |
| 529 | (setq nntp-async-articles articles) |
| 530 | (setq nntp-async-fetched nil) |
| 531 | ;; Clear any old data. |
| 532 | (save-excursion |
| 533 | (set-buffer nntp-async-buffer) |
| 534 | (erase-buffer)) |
| 535 | ;; Select the correct current group on this server. |
| 536 | (nntp-async-send-strings "GROUP" group) |
| 537 | t))) |
| 538 | |
| 539 | (deffoo nntp-list-active-group (group &optional server) |
| 540 | "Return the active info on GROUP (which can be a regexp." |
| 541 | (nntp-possibly-change-server group server) |
| 542 | (nntp-send-command "^.*\r?\n" "LIST ACTIVE" group)) |
| 543 | |
| 544 | (deffoo nntp-request-group-description (group &optional server) |
| 545 | "Get the description of GROUP." |
| 546 | (nntp-possibly-change-server nil server) |
| 547 | (prog1 |
| 548 | (nntp-send-command "^.*\r?\n" "XGTITLE" group) |
| 549 | (nntp-decode-text))) |
| 550 | |
| 551 | (deffoo nntp-close-group (group &optional server) |
| 552 | "Close GROUP." |
| 553 | (setq nntp-current-group nil) |
| 554 | t) |
| 555 | |
| 556 | (deffoo nntp-request-list (&optional server) |
| 557 | "List all active groups." |
| 558 | (nntp-possibly-change-server nil server) |
| 559 | (prog1 |
| 560 | (nntp-send-command "^\\.\r?\n" "LIST") |
| 561 | (nntp-decode-text))) |
| 562 | |
| 563 | (deffoo nntp-request-list-newsgroups (&optional server) |
| 564 | "Get descriptions on all groups on SERVER." |
| 565 | (nntp-possibly-change-server nil server) |
| 566 | (prog1 |
| 567 | (nntp-send-command "^\\.\r?\n" "LIST NEWSGROUPS") |
| 568 | (nntp-decode-text))) |
| 569 | |
| 570 | (deffoo nntp-request-newgroups (date &optional server) |
| 571 | "List groups that have arrived since DATE." |
| 572 | (nntp-possibly-change-server nil server) |
| 573 | (let* ((date (timezone-parse-date date)) |
| 574 | (time-string |
| 575 | (format "%s%02d%02d %s%s%s" |
| 576 | (substring (aref date 0) 2) (string-to-int (aref date 1)) |
| 577 | (string-to-int (aref date 2)) (substring (aref date 3) 0 2) |
| 578 | (substring |
| 579 | (aref date 3) 3 5) (substring (aref date 3) 6 8)))) |
| 580 | (prog1 |
| 581 | (nntp-send-command "^\\.\r?\n" "NEWGROUPS" time-string) |
| 582 | (nntp-decode-text)))) |
| 583 | |
| 584 | (deffoo nntp-request-list-distributions (&optional server) |
| 585 | "List distributions." |
| 586 | (nntp-possibly-change-server nil server) |
| 587 | (prog1 |
| 588 | (nntp-send-command "^\\.\r?\n" "LIST DISTRIBUTIONS") |
| 589 | (nntp-decode-text))) |
| 590 | |
| 591 | (deffoo nntp-request-last (&optional group server) |
| 592 | "Decrease the current article pointer." |
| 593 | (nntp-possibly-change-server group server) |
| 594 | (nntp-send-command "^[23].*\r?\n" "LAST")) |
| 595 | |
| 596 | (deffoo nntp-request-next (&optional group server) |
| 597 | "Advance the current article pointer." |
| 598 | (nntp-possibly-change-server group server) |
| 599 | (nntp-send-command "^[23].*\r?\n" "NEXT")) |
| 600 | |
| 601 | (deffoo nntp-request-post (&optional server) |
| 602 | "Post the current buffer." |
| 603 | (nntp-possibly-change-server nil server) |
| 604 | (when (nntp-send-command "^[23].*\r?\n" "POST") |
| 605 | (nnheader-insert "") |
| 606 | (nntp-encode-text) |
| 607 | (nntp-send-region-to-server (point-min) (point-max)) |
| 608 | ;; 1.2a NNTP's post command is buggy. "^M" (\r) is not |
| 609 | ;; appended to end of the status message. |
| 610 | (nntp-wait-for-response "^[23].*\n"))) |
| 611 | |
| 612 | ;;; Internal functions. |
| 613 | |
| 614 | (defun nntp-send-mode-reader () |
| 615 | "Send the MODE READER command to the nntp server. |
| 616 | This function is supposed to be called from `nntp-server-opened-hook'. |
| 617 | It will make innd servers spawn an nnrpd process to allow actual article |
| 618 | reading." |
| 619 | (nntp-send-command "^.*\r?\n" "MODE READER")) |
| 620 | |
| 621 | (defun nntp-send-nosy-authinfo () |
| 622 | "Send the AUTHINFO to the nntp server. |
| 623 | This function is supposed to be called from `nntp-server-opened-hook'. |
| 624 | It will prompt for a password." |
| 625 | (nntp-send-command "^.*\r?\n" "AUTHINFO USER" |
| 626 | (read-string "NNTP user name: ")) |
| 627 | (nntp-send-command "^.*\r?\n" "AUTHINFO PASS" |
| 628 | (read-string "NNTP password: "))) |
| 629 | |
| 630 | (defun nntp-send-authinfo () |
| 631 | "Send the AUTHINFO to the nntp server. |
| 632 | This function is supposed to be called from `nntp-server-opened-hook'. |
| 633 | It will prompt for a password." |
| 634 | (nntp-send-command "^.*\r?\n" "AUTHINFO USER" (user-login-name)) |
| 635 | (nntp-send-command "^.*\r?\n" "AUTHINFO PASS" |
| 636 | (read-string "NNTP password: "))) |
| 637 | |
| 638 | (defun nntp-send-authinfo-from-file () |
| 639 | "Send the AUTHINFO to the nntp server. |
| 640 | This function is supposed to be called from `nntp-server-opened-hook'. |
| 641 | It will prompt for a password." |
| 642 | (when (file-exists-p "~/.nntp-authinfo") |
| 643 | (save-excursion |
| 644 | (set-buffer (get-buffer-create " *authinfo*")) |
| 645 | (buffer-disable-undo (current-buffer)) |
| 646 | (erase-buffer) |
| 647 | (insert-file-contents "~/.nntp-authinfo") |
| 648 | (goto-char (point-min)) |
| 649 | (nntp-send-command "^.*\r?\n" "AUTHINFO USER" (user-login-name)) |
| 650 | (nntp-send-command |
| 651 | "^.*\r?\n" "AUTHINFO PASS" |
| 652 | (buffer-substring (point) (progn (end-of-line) (point)))) |
| 653 | (kill-buffer (current-buffer))))) |
| 654 | |
| 655 | (defun nntp-default-sentinel (proc status) |
| 656 | "Default sentinel function for NNTP server process." |
| 657 | (let ((servers (cddr (assq 'nntp nnoo-state-alist))) |
| 658 | server) |
| 659 | ;; Go through the alist of server names and find the name of the |
| 660 | ;; server that the process that sent the signal is connected to. |
| 661 | ;; If you get my drift. |
| 662 | (if (equal proc nntp-server-process) |
| 663 | (setq server nntp-address) |
| 664 | (while (and servers |
| 665 | (not (equal proc (cdr (assq 'nntp-server-process |
| 666 | (car servers)))))) |
| 667 | (setq servers (cdr servers))) |
| 668 | (setq server (caar servers))) |
| 669 | (when (and server |
| 670 | nntp-warn-about-losing-connection) |
| 671 | (nnheader-message 3 "nntp: Connection closed to server %s" server) |
| 672 | (setq nntp-current-group "") |
| 673 | (ding)))) |
| 674 | |
| 675 | (defun nntp-kill-connection (server) |
| 676 | "Choke the connection to SERVER." |
| 677 | (let ((proc (cdr (assq 'nntp-server-process |
| 678 | (assoc server (cddr |
| 679 | (assq 'nntp nnoo-state-alist))))))) |
| 680 | (when proc |
| 681 | (delete-process (process-name proc))) |
| 682 | (nntp-close-server server) |
| 683 | (nnheader-report |
| 684 | 'nntp (message "Connection timed out to server %s" server)) |
| 685 | (ding) |
| 686 | (sit-for 1))) |
| 687 | |
| 688 | ;; Encoding and decoding of NNTP text. |
| 689 | |
| 690 | (defun nntp-decode-text () |
| 691 | "Decode text transmitted by NNTP. |
| 692 | 0. Delete status line. |
| 693 | 1. Delete `^M' at end of line. |
| 694 | 2. Delete `.' at end of buffer (end of text mark). |
| 695 | 3. Delete `.' at beginning of line." |
| 696 | (save-excursion |
| 697 | (set-buffer nntp-server-buffer) |
| 698 | ;; Insert newline at end of buffer. |
| 699 | (goto-char (point-max)) |
| 700 | (or (bolp) (insert "\n")) |
| 701 | ;; Delete status line. |
| 702 | (delete-region (goto-char (point-min)) (progn (forward-line 1) (point))) |
| 703 | ;; Delete `^M's. |
| 704 | (while (search-forward "\r" nil t) |
| 705 | (replace-match "" t t)) |
| 706 | ;; Delete `.' at end of the buffer (end of text mark). |
| 707 | (goto-char (point-max)) |
| 708 | (forward-line -1) |
| 709 | (when (looking-at "^\\.\n") |
| 710 | (delete-region (point) (progn (forward-line 1) (point)))) |
| 711 | ;; Replace `..' at beginning of line with `.'. |
| 712 | (goto-char (point-min)) |
| 713 | ;; (replace-regexp "^\\.\\." ".") |
| 714 | (while (search-forward "\n.." nil t) |
| 715 | (delete-char -1)))) |
| 716 | |
| 717 | (defun nntp-encode-text () |
| 718 | "Encode text in current buffer for NNTP transmission. |
| 719 | 1. Insert `.' at beginning of line. |
| 720 | 2. Insert `.' at end of buffer (end of text mark)." |
| 721 | (save-excursion |
| 722 | ;; Replace `.' at beginning of line with `..'. |
| 723 | (goto-char (point-min)) |
| 724 | (while (search-forward "\n." nil t) |
| 725 | (insert ".")) |
| 726 | (goto-char (point-max)) |
| 727 | ;; Insert newline at end of buffer. |
| 728 | (or (bolp) (insert "\n")) |
| 729 | ;; Insert `.' at end of buffer (end of text mark). |
| 730 | (insert "." nntp-end-of-line))) |
| 731 | |
| 732 | \f |
| 733 | ;;; |
| 734 | ;;; Synchronous Communication with NNTP servers. |
| 735 | ;;; |
| 736 | |
| 737 | (defvar nntp-retry-command) |
| 738 | |
| 739 | (defun nntp-send-command (response cmd &rest args) |
| 740 | "Wait for server RESPONSE after sending CMD and optional ARGS to server." |
| 741 | (let ((timer |
| 742 | (and nntp-command-timeout |
| 743 | (nnheader-run-at-time |
| 744 | nntp-command-timeout nil 'nntp-kill-command |
| 745 | (nnoo-current-server 'nntp)))) |
| 746 | (nntp-retry-command t) |
| 747 | result) |
| 748 | (unwind-protect |
| 749 | (save-excursion |
| 750 | (while nntp-retry-command |
| 751 | (setq nntp-retry-command nil) |
| 752 | ;; Clear communication buffer. |
| 753 | (set-buffer nntp-server-buffer) |
| 754 | (widen) |
| 755 | (erase-buffer) |
| 756 | (if nntp-retry-on-break |
| 757 | (condition-case () |
| 758 | (progn |
| 759 | (apply 'nntp-send-strings-to-server cmd args) |
| 760 | (setq result |
| 761 | (if response |
| 762 | (nntp-wait-for-response response) |
| 763 | t))) |
| 764 | (quit (setq nntp-retry-command t))) |
| 765 | (apply 'nntp-send-strings-to-server cmd args) |
| 766 | (setq result |
| 767 | (if response |
| 768 | (nntp-wait-for-response response) |
| 769 | t)))) |
| 770 | result) |
| 771 | (when timer |
| 772 | (nnheader-cancel-timer timer))))) |
| 773 | |
| 774 | (defun nntp-kill-command (server) |
| 775 | "Kill and restart the connection to SERVER." |
| 776 | (let ((proc (cdr (assq |
| 777 | 'nntp-server-process |
| 778 | (assoc server (cddr (assq 'nntp nnoo-state-alist))))))) |
| 779 | (when proc |
| 780 | (delete-process (process-name proc))) |
| 781 | (nntp-close-server server) |
| 782 | (nntp-open-server server) |
| 783 | (when nntp-current-group |
| 784 | (nntp-request-group nntp-current-group)) |
| 785 | (setq nntp-retry-command t))) |
| 786 | |
| 787 | (defun nntp-send-command-old (response cmd &rest args) |
| 788 | "Wait for server RESPONSE after sending CMD and optional ARGS to server." |
| 789 | (save-excursion |
| 790 | ;; Clear communication buffer. |
| 791 | (set-buffer nntp-server-buffer) |
| 792 | (erase-buffer) |
| 793 | (apply 'nntp-send-strings-to-server cmd args) |
| 794 | (if response |
| 795 | (nntp-wait-for-response response) |
| 796 | t))) |
| 797 | |
| 798 | (defun nntp-wait-for-response (regexp &optional slow) |
| 799 | "Wait for server response which matches REGEXP." |
| 800 | (save-excursion |
| 801 | (let ((status t) |
| 802 | (wait t) |
| 803 | (dotnum 0) ;Number of "." being displayed. |
| 804 | (dotsize ;How often "." displayed. |
| 805 | (if (numberp nntp-debug-read) nntp-debug-read 10000))) |
| 806 | (set-buffer nntp-server-buffer) |
| 807 | ;; Wait for status response (RFC977). |
| 808 | ;; 1xx - Informative message. |
| 809 | ;; 2xx - Command ok. |
| 810 | ;; 3xx - Command ok so far, send the rest of it. |
| 811 | ;; 4xx - Command was correct, but couldn't be performed for some |
| 812 | ;; reason. |
| 813 | ;; 5xx - Command unimplemented, or incorrect, or a serious |
| 814 | ;; program error occurred. |
| 815 | (nntp-accept-response) |
| 816 | (while wait |
| 817 | (goto-char (point-min)) |
| 818 | (if slow |
| 819 | (progn |
| 820 | (cond ((re-search-forward "^[23][0-9][0-9]" nil t) |
| 821 | (setq wait nil)) |
| 822 | ((re-search-forward "^[45][0-9][0-9]" nil t) |
| 823 | (setq status nil) |
| 824 | (setq wait nil)) |
| 825 | (t (nntp-accept-response))) |
| 826 | (if (not wait) (delete-region (point-min) |
| 827 | (progn (beginning-of-line) |
| 828 | (point))))) |
| 829 | (cond ((looking-at "[23]") |
| 830 | (setq wait nil)) |
| 831 | ((looking-at "[45]") |
| 832 | (setq status nil) |
| 833 | (setq wait nil)) |
| 834 | (t (nntp-accept-response))))) |
| 835 | ;; Save status message. |
| 836 | (end-of-line) |
| 837 | (setq nntp-status-string |
| 838 | (nnheader-replace-chars-in-string |
| 839 | (buffer-substring (point-min) (point)) ?\r ? )) |
| 840 | (when status |
| 841 | (setq wait t) |
| 842 | (while wait |
| 843 | (goto-char (point-max)) |
| 844 | (if (bolp) (forward-line -1) (beginning-of-line)) |
| 845 | (if (looking-at regexp) |
| 846 | (setq wait nil) |
| 847 | (when nntp-debug-read |
| 848 | (let ((newnum (/ (buffer-size) dotsize)) |
| 849 | (message-log-max nil)) |
| 850 | (unless (= dotnum newnum) |
| 851 | (setq dotnum newnum) |
| 852 | (nnheader-message 7 "NNTP: Reading %s" |
| 853 | (make-string dotnum ?.))))) |
| 854 | (nntp-accept-response))) |
| 855 | ;; Remove "...". |
| 856 | (when (and nntp-debug-read (> dotnum 0)) |
| 857 | (message "")) |
| 858 | ;; Successfully received server response. |
| 859 | t)))) |
| 860 | |
| 861 | \f |
| 862 | |
| 863 | ;;; |
| 864 | ;;; Low-Level Interface to NNTP Server. |
| 865 | ;;; |
| 866 | |
| 867 | (defun nntp-find-group-and-number () |
| 868 | (save-excursion |
| 869 | (save-restriction |
| 870 | (set-buffer nntp-server-buffer) |
| 871 | (narrow-to-region (goto-char (point-min)) |
| 872 | (or (search-forward "\n\n" nil t) (point-max))) |
| 873 | (goto-char (point-min)) |
| 874 | ;; We first find the number by looking at the status line. |
| 875 | (let ((number (and (looking-at "2[0-9][0-9] +\\([0-9]+\\) ") |
| 876 | (string-to-int |
| 877 | (buffer-substring (match-beginning 1) |
| 878 | (match-end 1))))) |
| 879 | group newsgroups xref) |
| 880 | (and number (zerop number) (setq number nil)) |
| 881 | ;; Then we find the group name. |
| 882 | (setq group |
| 883 | (cond |
| 884 | ;; If there is only one group in the Newsgroups header, |
| 885 | ;; then it seems quite likely that this article comes |
| 886 | ;; from that group, I'd say. |
| 887 | ((and (setq newsgroups (mail-fetch-field "newsgroups")) |
| 888 | (not (string-match "," newsgroups))) |
| 889 | newsgroups) |
| 890 | ;; If there is more than one group in the Newsgroups |
| 891 | ;; header, then the Xref header should be filled out. |
| 892 | ;; We hazard a guess that the group that has this |
| 893 | ;; article number in the Xref header is the one we are |
| 894 | ;; looking for. This might very well be wrong if this |
| 895 | ;; article happens to have the same number in several |
| 896 | ;; groups, but that's life. |
| 897 | ((and (setq xref (mail-fetch-field "xref")) |
| 898 | number |
| 899 | (string-match (format "\\([^ :]+\\):%d" number) xref)) |
| 900 | (substring xref (match-beginning 1) (match-end 1))) |
| 901 | (t ""))) |
| 902 | (when (string-match "\r" group) |
| 903 | (setq group (substring group 0 (match-beginning 0)))) |
| 904 | (cons group number))))) |
| 905 | |
| 906 | (defun nntp-retrieve-headers-with-xover (articles &optional fetch-old) |
| 907 | (erase-buffer) |
| 908 | (cond |
| 909 | |
| 910 | ;; This server does not talk NOV. |
| 911 | ((not nntp-server-xover) |
| 912 | nil) |
| 913 | |
| 914 | ;; We don't care about gaps. |
| 915 | ((or (not nntp-nov-gap) |
| 916 | fetch-old) |
| 917 | (nntp-send-xover-command |
| 918 | (if fetch-old |
| 919 | (if (numberp fetch-old) |
| 920 | (max 1 (- (car articles) fetch-old)) |
| 921 | 1) |
| 922 | (car articles)) |
| 923 | (nntp-last-element articles) 'wait) |
| 924 | |
| 925 | (goto-char (point-min)) |
| 926 | (when (looking-at "[1-5][0-9][0-9] ") |
| 927 | (delete-region (point) (progn (forward-line 1) (point)))) |
| 928 | (while (search-forward "\r" nil t) |
| 929 | (replace-match "" t t)) |
| 930 | (goto-char (point-max)) |
| 931 | (forward-line -1) |
| 932 | (when (looking-at "\\.") |
| 933 | (delete-region (point) (progn (forward-line 1) (point))))) |
| 934 | |
| 935 | ;; We do it the hard way. For each gap, an XOVER command is sent |
| 936 | ;; to the server. We do not wait for a reply from the server, we |
| 937 | ;; just send them off as fast as we can. That means that we have |
| 938 | ;; to count the number of responses we get back to find out when we |
| 939 | ;; have gotten all we asked for. |
| 940 | ((numberp nntp-nov-gap) |
| 941 | (let ((count 0) |
| 942 | (received 0) |
| 943 | (last-point (point-min)) |
| 944 | (buf (current-buffer)) |
| 945 | first) |
| 946 | ;; We have to check `nntp-server-xover'. If it gets set to nil, |
| 947 | ;; that means that the server does not understand XOVER, but we |
| 948 | ;; won't know that until we try. |
| 949 | (while (and nntp-server-xover articles) |
| 950 | (setq first (car articles)) |
| 951 | ;; Search forward until we find a gap, or until we run out of |
| 952 | ;; articles. |
| 953 | (while (and (cdr articles) |
| 954 | (< (- (nth 1 articles) (car articles)) nntp-nov-gap)) |
| 955 | (setq articles (cdr articles))) |
| 956 | |
| 957 | (when (nntp-send-xover-command first (car articles)) |
| 958 | (setq articles (cdr articles) |
| 959 | count (1+ count)) |
| 960 | |
| 961 | ;; Every 400 requests we have to read the stream in |
| 962 | ;; order to avoid deadlocks. |
| 963 | (when (or (null articles) ;All requests have been sent. |
| 964 | (zerop (% count nntp-maximum-request))) |
| 965 | (accept-process-output) |
| 966 | ;; On some Emacs versions the preceding function has |
| 967 | ;; a tendency to change the buffer. Perhaps. It's |
| 968 | ;; quite difficult to reproduce, because it only |
| 969 | ;; seems to happen once in a blue moon. |
| 970 | (set-buffer buf) |
| 971 | (while (progn |
| 972 | (goto-char last-point) |
| 973 | ;; Count replies. |
| 974 | (while (re-search-forward "^[0-9][0-9][0-9] " nil t) |
| 975 | (setq received (1+ received))) |
| 976 | (setq last-point (point)) |
| 977 | (< received count)) |
| 978 | (accept-process-output) |
| 979 | (set-buffer buf))))) |
| 980 | |
| 981 | (when nntp-server-xover |
| 982 | ;; Wait for the reply from the final command. |
| 983 | (goto-char (point-max)) |
| 984 | (re-search-backward "^[0-9][0-9][0-9] " nil t) |
| 985 | (when (looking-at "^[23]") |
| 986 | (while (progn |
| 987 | (goto-char (point-max)) |
| 988 | (forward-line -1) |
| 989 | (not (looking-at "^\\.\r?\n"))) |
| 990 | (nntp-accept-response))) |
| 991 | |
| 992 | ;; We remove any "." lines and status lines. |
| 993 | (goto-char (point-min)) |
| 994 | (while (search-forward "\r" nil t) |
| 995 | (delete-char -1)) |
| 996 | (goto-char (point-min)) |
| 997 | (delete-matching-lines "^\\.$\\|^[1-5][0-9][0-9] "))))) |
| 998 | |
| 999 | nntp-server-xover) |
| 1000 | |
| 1001 | (defun nntp-send-xover-command (beg end &optional wait-for-reply) |
| 1002 | "Send the XOVER command to the server." |
| 1003 | (let ((range (format "%d-%d" (or beg 1) (or end beg 1)))) |
| 1004 | (if (stringp nntp-server-xover) |
| 1005 | ;; If `nntp-server-xover' is a string, then we just send this |
| 1006 | ;; command. |
| 1007 | (if wait-for-reply |
| 1008 | (nntp-send-command "^\\.\r?\n" nntp-server-xover range) |
| 1009 | ;; We do not wait for the reply. |
| 1010 | (nntp-send-strings-to-server nntp-server-xover range)) |
| 1011 | (let ((commands nntp-xover-commands)) |
| 1012 | ;; `nntp-xover-commands' is a list of possible XOVER commands. |
| 1013 | ;; We try them all until we get at positive response. |
| 1014 | (while (and commands (eq nntp-server-xover 'try)) |
| 1015 | (nntp-send-command "^\\.\r?\n" (car commands) range) |
| 1016 | (save-excursion |
| 1017 | (set-buffer nntp-server-buffer) |
| 1018 | (goto-char (point-min)) |
| 1019 | (and (looking-at "[23]") ; No error message. |
| 1020 | ;; We also have to look at the lines. Some buggy |
| 1021 | ;; servers give back simple lines with just the |
| 1022 | ;; article number. How... helpful. |
| 1023 | (progn |
| 1024 | (forward-line 1) |
| 1025 | (looking-at "[0-9]+\t...")) ; More text after number. |
| 1026 | (setq nntp-server-xover (car commands)))) |
| 1027 | (setq commands (cdr commands))) |
| 1028 | ;; If none of the commands worked, we disable XOVER. |
| 1029 | (when (eq nntp-server-xover 'try) |
| 1030 | (save-excursion |
| 1031 | (set-buffer nntp-server-buffer) |
| 1032 | (erase-buffer) |
| 1033 | (setq nntp-server-xover nil))) |
| 1034 | nntp-server-xover)))) |
| 1035 | |
| 1036 | (defun nntp-send-strings-to-server (&rest strings) |
| 1037 | "Send STRINGS to the server." |
| 1038 | (let ((cmd (concat (mapconcat 'identity strings " ") nntp-end-of-line))) |
| 1039 | ;; We open the nntp server if it is down. |
| 1040 | (or (nntp-server-opened (nnoo-current-server 'nntp)) |
| 1041 | (nntp-open-server (nnoo-current-server 'nntp)) |
| 1042 | (error (nntp-status-message))) |
| 1043 | ;; Send the strings. |
| 1044 | (process-send-string nntp-server-process cmd) |
| 1045 | t)) |
| 1046 | |
| 1047 | (defun nntp-send-region-to-server (begin end) |
| 1048 | "Send the current buffer region (from BEGIN to END) to the server." |
| 1049 | (save-excursion |
| 1050 | (let ((cur (current-buffer))) |
| 1051 | ;; Copy the buffer over to the send buffer. |
| 1052 | (nnheader-set-temp-buffer " *nntp send*") |
| 1053 | (insert-buffer-substring cur begin end) |
| 1054 | (save-excursion |
| 1055 | (set-buffer cur) |
| 1056 | (erase-buffer)) |
| 1057 | ;; `process-send-region' does not work if the text to be sent is very |
| 1058 | ;; large, so we send it piecemeal. |
| 1059 | (let ((last (point-min)) |
| 1060 | (size 100)) ;Size of text sent at once. |
| 1061 | (while (and (/= last (point-max)) |
| 1062 | (memq (process-status nntp-server-process) '(open run))) |
| 1063 | (process-send-region |
| 1064 | nntp-server-process |
| 1065 | last (setq last (min (+ last size) (point-max)))) |
| 1066 | ;; Read any output from the server. May be unnecessary. |
| 1067 | (accept-process-output))) |
| 1068 | (kill-buffer (current-buffer))))) |
| 1069 | |
| 1070 | (defun nntp-open-server-semi-internal (server &optional service) |
| 1071 | "Open SERVER. |
| 1072 | If SERVER is nil, use value of environment variable `NNTPSERVER'. |
| 1073 | If SERVICE, this this as the port number." |
| 1074 | (nnheader-insert "") |
| 1075 | (let ((server (or server (getenv "NNTPSERVER"))) |
| 1076 | (status nil) |
| 1077 | (timer |
| 1078 | (and nntp-connection-timeout |
| 1079 | (nnheader-run-at-time nntp-connection-timeout |
| 1080 | nil 'nntp-kill-connection server)))) |
| 1081 | (save-excursion |
| 1082 | (set-buffer nntp-server-buffer) |
| 1083 | (setq nntp-status-string "") |
| 1084 | (nnheader-message 5 "nntp: Connecting to server on %s..." nntp-address) |
| 1085 | (cond ((and server (nntp-open-server-internal server service)) |
| 1086 | (setq nntp-address server) |
| 1087 | (setq status |
| 1088 | (condition-case nil |
| 1089 | (nntp-wait-for-response "^[23].*\r?\n" 'slow) |
| 1090 | (error nil) |
| 1091 | (quit nil))) |
| 1092 | (unless status |
| 1093 | (nntp-close-server-internal server) |
| 1094 | (nnheader-report |
| 1095 | 'nntp "Couldn't open connection to %s" |
| 1096 | (if (and nntp-address |
| 1097 | (not (equal nntp-address ""))) |
| 1098 | nntp-address server))) |
| 1099 | (when nntp-server-process |
| 1100 | (set-process-sentinel |
| 1101 | nntp-server-process 'nntp-default-sentinel) |
| 1102 | ;; You can send commands at startup like AUTHINFO here. |
| 1103 | ;; Added by Hallvard B Furuseth <h.b.furuseth@usit.uio.no> |
| 1104 | (run-hooks 'nntp-server-opened-hook))) |
| 1105 | ((null server) |
| 1106 | (nnheader-report 'nntp "NNTP server is not specified.")) |
| 1107 | (t ; We couldn't open the server. |
| 1108 | (nnheader-report |
| 1109 | 'nntp (buffer-substring (point-min) (point-max))))) |
| 1110 | (when timer |
| 1111 | (nnheader-cancel-timer timer)) |
| 1112 | (message "") |
| 1113 | (unless status |
| 1114 | (nnoo-close-server 'nntp server) |
| 1115 | (setq nntp-async-number nil)) |
| 1116 | status))) |
| 1117 | |
| 1118 | (defvar nntp-default-directories '("~" "/tmp" "/") |
| 1119 | "Directories to as current directory in the nntp server buffer.") |
| 1120 | |
| 1121 | (defun nntp-open-server-internal (server &optional service) |
| 1122 | "Open connection to news server on SERVER by SERVICE (default is nntp)." |
| 1123 | (let (proc) |
| 1124 | (save-excursion |
| 1125 | (set-buffer nntp-server-buffer) |
| 1126 | ;; Make sure we have a valid current directory for the |
| 1127 | ;; nntp server buffer. |
| 1128 | (unless (file-exists-p default-directory) |
| 1129 | (let ((dirs nntp-default-directories)) |
| 1130 | (while dirs |
| 1131 | (when (file-exists-p (car dirs)) |
| 1132 | (setq default-directory (car dirs) |
| 1133 | dirs nil)) |
| 1134 | (setq dirs (cdr dirs))))) |
| 1135 | (cond |
| 1136 | ((and (setq proc |
| 1137 | (condition-case nil |
| 1138 | (funcall nntp-open-server-function server) |
| 1139 | (error nil))) |
| 1140 | (memq (process-status proc) '(open run))) |
| 1141 | (setq nntp-server-process proc) |
| 1142 | (setq nntp-address server) |
| 1143 | ;; Suggested by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>. |
| 1144 | (process-kill-without-query proc) |
| 1145 | (run-hooks 'nntp-server-hook) |
| 1146 | (push proc nntp-opened-connections) |
| 1147 | (condition-case () |
| 1148 | (nntp-read-server-type) |
| 1149 | (error |
| 1150 | (nnheader-report 'nntp "Couldn't open server %s" server) |
| 1151 | (nntp-close-server))) |
| 1152 | nntp-server-process) |
| 1153 | (t |
| 1154 | (nnheader-report 'nntp "Couldn't open server %s" server)))))) |
| 1155 | |
| 1156 | (defun nntp-read-server-type () |
| 1157 | "Find out what the name of the server we have connected to is." |
| 1158 | ;; Wait for the status string to arrive. |
| 1159 | (nntp-wait-for-response "^.*\n" t) |
| 1160 | (setq nntp-server-type (buffer-string)) |
| 1161 | (let ((alist nntp-server-action-alist) |
| 1162 | entry) |
| 1163 | ;; Run server-specific commmands. |
| 1164 | (while alist |
| 1165 | (setq entry (pop alist)) |
| 1166 | (when (string-match (car entry) nntp-server-type) |
| 1167 | (if (and (listp (cadr entry)) |
| 1168 | (not (eq 'lambda (caadr entry)))) |
| 1169 | (eval (cadr entry)) |
| 1170 | (funcall (cadr entry))))))) |
| 1171 | |
| 1172 | (defun nntp-open-network-stream (server) |
| 1173 | (open-network-stream |
| 1174 | "nntpd" nntp-server-buffer server nntp-port-number)) |
| 1175 | |
| 1176 | (defun nntp-open-rlogin (server) |
| 1177 | (let ((proc (if nntp-rlogin-user-name |
| 1178 | (start-process |
| 1179 | "nntpd" nntp-server-buffer "rsh" |
| 1180 | "-l" nntp-rlogin-user-name server |
| 1181 | (mapconcat 'identity |
| 1182 | nntp-rlogin-parameters " ")) |
| 1183 | (start-process |
| 1184 | "nntpd" nntp-server-buffer "rsh" server |
| 1185 | (mapconcat 'identity |
| 1186 | nntp-rlogin-parameters " "))))) |
| 1187 | proc)) |
| 1188 | |
| 1189 | (defun nntp-telnet-to-machine () |
| 1190 | (let (b) |
| 1191 | (telnet "localhost") |
| 1192 | (goto-char (point-min)) |
| 1193 | (while (not (re-search-forward "^login: *" nil t)) |
| 1194 | (sit-for 1) |
| 1195 | (goto-char (point-min))) |
| 1196 | (goto-char (point-max)) |
| 1197 | (insert "larsi") |
| 1198 | (telnet-send-input) |
| 1199 | (setq b (point)) |
| 1200 | (while (not (re-search-forward ">" nil t)) |
| 1201 | (sit-for 1) |
| 1202 | (goto-char b)) |
| 1203 | (goto-char (point-max)) |
| 1204 | (insert "ls") |
| 1205 | (telnet-send-input))) |
| 1206 | |
| 1207 | (defun nntp-close-server-internal (&optional server) |
| 1208 | "Close connection to news server." |
| 1209 | (nntp-possibly-change-server nil server) |
| 1210 | (if nntp-server-process |
| 1211 | (delete-process nntp-server-process)) |
| 1212 | (setq nntp-server-process nil) |
| 1213 | (setq nntp-address "")) |
| 1214 | |
| 1215 | (defun nntp-accept-response () |
| 1216 | "Read response of server. |
| 1217 | It is well-known that the communication speed will be much improved by |
| 1218 | defining this function as macro." |
| 1219 | ;; To deal with server process exiting before |
| 1220 | ;; accept-process-output is called. |
| 1221 | ;; Suggested by Jason Venner <jason@violet.berkeley.edu>. |
| 1222 | ;; This is a copy of `nntp-default-sentinel'. |
| 1223 | (let ((buf (current-buffer))) |
| 1224 | (prog1 |
| 1225 | (if (or (not nntp-server-process) |
| 1226 | (not (memq (process-status nntp-server-process) '(open run)))) |
| 1227 | (error "nntp: Process connection closed; %s" (nntp-status-message)) |
| 1228 | (if nntp-buggy-select |
| 1229 | (progn |
| 1230 | ;; We cannot use `accept-process-output'. |
| 1231 | ;; Fujitsu UTS requires messages during sleep-for. |
| 1232 | ;; I don't know why. |
| 1233 | (nnheader-message 5 "NNTP: Reading...") |
| 1234 | (sleep-for 1) |
| 1235 | (nnheader-message 5 "")) |
| 1236 | (condition-case errorcode |
| 1237 | (accept-process-output nntp-server-process 1) |
| 1238 | (error |
| 1239 | (cond ((string-equal "select error: Invalid argument" |
| 1240 | (nth 1 errorcode)) |
| 1241 | ;; Ignore select error. |
| 1242 | nil) |
| 1243 | (t |
| 1244 | (signal (car errorcode) (cdr errorcode)))))))) |
| 1245 | (set-buffer buf)))) |
| 1246 | |
| 1247 | (defun nntp-last-element (list) |
| 1248 | "Return last element of LIST." |
| 1249 | (while (cdr list) |
| 1250 | (setq list (cdr list))) |
| 1251 | (car list)) |
| 1252 | |
| 1253 | (defun nntp-possibly-change-server (newsgroup server &optional connectionless) |
| 1254 | "Check whether the virtual server needs changing." |
| 1255 | (when (and server |
| 1256 | (not (nntp-server-opened server))) |
| 1257 | ;; This virtual server isn't open, so we (re)open it here. |
| 1258 | (nntp-open-server server nil t)) |
| 1259 | (when (and newsgroup |
| 1260 | (not (equal newsgroup nntp-current-group))) |
| 1261 | ;; Set the proper current group. |
| 1262 | (nntp-request-group newsgroup server))) |
| 1263 | |
| 1264 | (defun nntp-try-list-active (group) |
| 1265 | (nntp-list-active-group group) |
| 1266 | (save-excursion |
| 1267 | (set-buffer nntp-server-buffer) |
| 1268 | (goto-char (point-min)) |
| 1269 | (cond ((looking-at "5[0-9]+") |
| 1270 | (setq nntp-server-list-active-group nil)) |
| 1271 | (t |
| 1272 | (setq nntp-server-list-active-group t))))) |
| 1273 | |
| 1274 | (defun nntp-async-server-opened () |
| 1275 | (and nntp-async-process |
| 1276 | (memq (process-status nntp-async-process) '(open run)))) |
| 1277 | |
| 1278 | (defun nntp-async-open-server () |
| 1279 | (save-excursion |
| 1280 | (set-buffer (generate-new-buffer " *async-nntp*")) |
| 1281 | (setq nntp-async-buffer (current-buffer)) |
| 1282 | (buffer-disable-undo (current-buffer))) |
| 1283 | (let ((nntp-server-process nil) |
| 1284 | (nntp-server-buffer nntp-async-buffer)) |
| 1285 | (nntp-open-server-semi-internal nntp-address nntp-port-number) |
| 1286 | (if (not (setq nntp-async-process nntp-server-process)) |
| 1287 | (progn |
| 1288 | (setq nntp-async-number nil)) |
| 1289 | (set-process-buffer nntp-async-process nntp-async-buffer)))) |
| 1290 | |
| 1291 | (defun nntp-async-fetch-articles (article) |
| 1292 | (if (stringp article) |
| 1293 | () |
| 1294 | (let ((articles (cdr (memq (assq article nntp-async-articles) |
| 1295 | nntp-async-articles))) |
| 1296 | (max (cond ((numberp nntp-async-number) |
| 1297 | nntp-async-number) |
| 1298 | ((eq nntp-async-number t) |
| 1299 | (length nntp-async-articles)) |
| 1300 | (t 0))) |
| 1301 | nart) |
| 1302 | (while (and (>= (setq max (1- max)) 0) |
| 1303 | articles) |
| 1304 | (or (memq (setq nart (caar articles)) nntp-async-fetched) |
| 1305 | (progn |
| 1306 | (nntp-async-send-strings "ARTICLE " (int-to-string nart)) |
| 1307 | (setq nntp-async-fetched (cons nart nntp-async-fetched)))) |
| 1308 | (setq articles (cdr articles)))))) |
| 1309 | |
| 1310 | (defun nntp-async-send-strings (&rest strings) |
| 1311 | (let ((cmd (concat (mapconcat 'identity strings " ") nntp-end-of-line))) |
| 1312 | (or (nntp-async-server-opened) |
| 1313 | (nntp-async-open-server) |
| 1314 | (error (nntp-status-message))) |
| 1315 | (process-send-string nntp-async-process cmd))) |
| 1316 | |
| 1317 | (defun nntp-async-request-group (group) |
| 1318 | (if (equal group nntp-current-group) |
| 1319 | () |
| 1320 | (let ((asyncs (assoc group nntp-async-group-alist))) |
| 1321 | ;; A new group has been selected, so we push the current state |
| 1322 | ;; of async articles on an alist, and pull the old state off. |
| 1323 | (setq nntp-async-group-alist |
| 1324 | (cons (list nntp-current-group |
| 1325 | nntp-async-articles nntp-async-fetched |
| 1326 | nntp-async-process) |
| 1327 | (delq asyncs nntp-async-group-alist))) |
| 1328 | (and asyncs |
| 1329 | (progn |
| 1330 | (setq nntp-async-articles (nth 1 asyncs)) |
| 1331 | (setq nntp-async-fetched (nth 2 asyncs)) |
| 1332 | (setq nntp-async-process (nth 3 asyncs))))))) |
| 1333 | |
| 1334 | (provide 'nntp) |
| 1335 | |
| 1336 | ;;; nntp.el ends here |