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d99a45914d
* lisp/gnus/shr.el (shr-insert): * lisp/gnus/pop3.el (pop3-movemail): * lisp/gnus/gnus-html.el (gnus-html-wash-tags): Don't use plusp.
686 lines
22 KiB
EmacsLisp
686 lines
22 KiB
EmacsLisp
;;; pop3.el --- Post Office Protocol (RFC 1460) interface
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;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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;; 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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;; Author: Richard L. Pieri <ratinox@peorth.gweep.net>
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;; Maintainer: FSF
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;; Keywords: mail
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Most of the standard Post Office Protocol version 3 (RFC 1460) commands
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;; are implemented. The LIST command has not been implemented due to lack
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;; of actual usefulness.
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;; The optional POP3 command TOP has not been implemented.
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;; This program was inspired by Kyle E. Jones's vm-pop program.
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'mail-utils)
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(defvar parse-time-months)
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(defgroup pop3 nil
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"Post Office Protocol."
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:group 'mail
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:group 'mail-source)
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(defcustom pop3-maildrop (or (user-login-name)
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(getenv "LOGNAME")
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(getenv "USER"))
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"*POP3 maildrop."
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:version "22.1" ;; Oort Gnus
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:type 'string
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:group 'pop3)
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(defcustom pop3-mailhost (or (getenv "MAILHOST") ;; nil -> mismatch
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"pop3")
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"*POP3 mailhost."
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:version "22.1" ;; Oort Gnus
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:type 'string
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:group 'pop3)
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(defcustom pop3-port 110
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"*POP3 port."
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:version "22.1" ;; Oort Gnus
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:type 'number
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:group 'pop3)
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(defcustom pop3-password-required t
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"*Non-nil if a password is required when connecting to POP server."
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:version "22.1" ;; Oort Gnus
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:type 'boolean
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:group 'pop3)
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;; Should this be customizable?
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(defvar pop3-password nil
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"*Password to use when connecting to POP server.")
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(defcustom pop3-authentication-scheme 'pass
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"*POP3 authentication scheme.
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Defaults to `pass', for the standard USER/PASS authentication. The other
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valid value is 'apop'."
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:type '(choice (const :tag "Normal user/password" pass)
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(const :tag "APOP" apop))
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:version "22.1" ;; Oort Gnus
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:group 'pop3)
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(defcustom pop3-stream-length 100
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"How many messages should be requested at one time.
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The lower the number, the more latency-sensitive the fetching
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will be. If your pop3 server doesn't support streaming at all,
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set this to 1."
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:type 'number
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:version "24.1"
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:group 'pop3)
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(defcustom pop3-leave-mail-on-server nil
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"*Non-nil if the mail is to be left on the POP server after fetching.
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If `pop3-leave-mail-on-server' is non-nil the mail is to be left
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on the POP server after fetching. Note that POP servers maintain
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no state information between sessions, so what the client
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believes is there and what is actually there may not match up.
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If they do not, then you may get duplicate mails or the whole
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thing can fall apart and leave you with a corrupt mailbox."
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;; We can't use the UILD support from XEmacs mail-lib or cvs.m17n.org:
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;; http://thread.gmane.org/v9lld8fml4.fsf@marauder.physik.uni-ulm.de
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;; http://thread.gmane.org/b9yy8hzy9ej.fsf@jpl.org
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;; Any volunteer to re-implement this?
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:version "22.1" ;; Oort Gnus
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:type 'boolean
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:group 'pop3)
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(defvar pop3-timestamp nil
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"Timestamp returned when initially connected to the POP server.
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Used for APOP authentication.")
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(defvar pop3-read-point nil)
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(defvar pop3-debug nil)
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;; Borrowed from nnheader-accept-process-output in nnheader.el. See the
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;; comments there for explanations about the values.
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(eval-and-compile
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(if (and (fboundp 'nnheader-accept-process-output)
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(boundp 'nnheader-read-timeout))
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(defalias 'pop3-accept-process-output 'nnheader-accept-process-output)
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;; Borrowed from `nnheader.el':
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(defvar pop3-read-timeout
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(if (string-match "windows-nt\\|os/2\\|cygwin"
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(symbol-name system-type))
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1.0
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0.01)
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"How long pop3 should wait between checking for the end of output.
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Shorter values mean quicker response, but are more CPU intensive.")
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(defun pop3-accept-process-output (process)
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(accept-process-output
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process
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(truncate pop3-read-timeout)
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(truncate (* (- pop3-read-timeout
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(truncate pop3-read-timeout))
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1000))))))
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;;;###autoload
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(defun pop3-movemail (file)
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"Transfer contents of a maildrop to the specified FILE.
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Use streaming commands."
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(let* ((process (pop3-open-server pop3-mailhost pop3-port))
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message-count message-total-size)
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(pop3-logon process)
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(with-current-buffer (process-buffer process)
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(let ((size (pop3-stat process)))
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(setq message-count (car size)
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message-total-size (cadr size)))
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(when (> message-count 0)
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(pop3-send-streaming-command
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process "RETR" message-count message-total-size)
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(pop3-write-to-file file)
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(unless pop3-leave-mail-on-server
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(pop3-send-streaming-command
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process "DELE" message-count nil))))
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(pop3-quit process)
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t))
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(defun pop3-send-streaming-command (process command count total-size)
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(erase-buffer)
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(let ((i 1))
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(while (>= count i)
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(process-send-string process (format "%s %d\r\n" command i))
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;; Only do 100 messages at a time to avoid pipe stalls.
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(when (zerop (% i pop3-stream-length))
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(pop3-wait-for-messages process i total-size))
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(incf i)))
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(pop3-wait-for-messages process count total-size))
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(defun pop3-wait-for-messages (process count total-size)
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(while (< (pop3-number-of-responses total-size) count)
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(when total-size
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(message "pop3 retrieved %dKB (%d%%)"
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(truncate (/ (buffer-size) 1000))
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(truncate (* (/ (* (buffer-size) 1.0)
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total-size) 100))))
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(pop3-accept-process-output process)))
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(defun pop3-write-to-file (file)
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(let ((pop-buffer (current-buffer))
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(start (point-min))
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beg end
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temp-buffer)
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(with-temp-buffer
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(setq temp-buffer (current-buffer))
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(with-current-buffer pop-buffer
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(goto-char (point-min))
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(while (re-search-forward "^\\+OK" nil t)
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(forward-line 1)
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(setq beg (point))
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(when (re-search-forward "^\\.\r?\n" nil t)
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(setq start (point))
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(forward-line -1)
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(setq end (point)))
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(with-current-buffer temp-buffer
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(goto-char (point-max))
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(let ((hstart (point)))
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(insert-buffer-substring pop-buffer beg end)
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(pop3-clean-region hstart (point))
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(goto-char (point-max))
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(pop3-munge-message-separator hstart (point))
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(goto-char (point-max))))))
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(let ((coding-system-for-write 'binary))
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(goto-char (point-min))
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;; Check whether something inserted a newline at the start and
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;; delete it.
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(when (eolp)
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(delete-char 1))
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(write-region (point-min) (point-max) file nil 'nomesg)))))
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(defun pop3-number-of-responses (endp)
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(let ((responses 0))
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(save-excursion
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(goto-char (point-min))
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(while (or (and (re-search-forward "^\\+OK" nil t)
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(or (not endp)
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(re-search-forward "^\\.\r?\n" nil t)))
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(re-search-forward "^-ERR " nil t))
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(incf responses)))
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responses))
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(defun pop3-logon (process)
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(let ((pop3-password pop3-password))
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;; for debugging only
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(if pop3-debug (switch-to-buffer (process-buffer process)))
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;; query for password
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(if (and pop3-password-required (not pop3-password))
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(setq pop3-password
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(read-passwd (format "Password for %s: " pop3-maildrop))))
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(cond ((equal 'apop pop3-authentication-scheme)
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(pop3-apop process pop3-maildrop))
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((equal 'pass pop3-authentication-scheme)
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(pop3-user process pop3-maildrop)
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(pop3-pass process))
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(t (error "Invalid POP3 authentication scheme")))))
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(defun pop3-get-message-count ()
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"Return the number of messages in the maildrop."
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(let* ((process (pop3-open-server pop3-mailhost pop3-port))
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message-count
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(pop3-password pop3-password))
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;; for debugging only
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(if pop3-debug (switch-to-buffer (process-buffer process)))
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;; query for password
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(if (and pop3-password-required (not pop3-password))
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(setq pop3-password
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(read-passwd (format "Password for %s: " pop3-maildrop))))
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(cond ((equal 'apop pop3-authentication-scheme)
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(pop3-apop process pop3-maildrop))
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((equal 'pass pop3-authentication-scheme)
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(pop3-user process pop3-maildrop)
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(pop3-pass process))
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(t (error "Invalid POP3 authentication scheme")))
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(setq message-count (car (pop3-stat process)))
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(pop3-quit process)
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message-count))
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(autoload 'open-tls-stream "tls")
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(autoload 'starttls-open-stream "starttls")
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(autoload 'starttls-negotiate "starttls") ; avoid warning
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(defcustom pop3-stream-type nil
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"*Transport security type for POP3 connexions.
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This may be either nil (plain connexion), `ssl' (use an
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SSL/TSL-secured stream) or `starttls' (use the starttls mechanism
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to turn on TLS security after opening the stream). However, if
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this is nil, `ssl' is assumed for connexions to port
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995 (pop3s)."
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:version "23.1" ;; No Gnus
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:group 'pop3
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:type '(choice (const :tag "Plain" nil)
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(const :tag "SSL/TLS" ssl)
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(const starttls)))
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(eval-and-compile
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(if (fboundp 'set-process-query-on-exit-flag)
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(defalias 'pop3-set-process-query-on-exit-flag
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'set-process-query-on-exit-flag)
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(defalias 'pop3-set-process-query-on-exit-flag
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'process-kill-without-query)))
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(defun pop3-open-server (mailhost port)
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"Open TCP connection to MAILHOST on PORT.
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Returns the process associated with the connection."
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(let ((coding-system-for-read 'binary)
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(coding-system-for-write 'binary)
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process)
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(with-current-buffer
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(get-buffer-create (concat " trace of POP session to "
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mailhost))
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(erase-buffer)
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(setq pop3-read-point (point-min))
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(setq process
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(cond
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((or (eq pop3-stream-type 'ssl)
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(and (not pop3-stream-type) (member port '(995 "pop3s"))))
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;; gnutls-cli, openssl don't accept service names
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(if (or (equal port "pop3s")
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(null port))
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(setq port 995))
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(let ((process (open-tls-stream "POP" (current-buffer)
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mailhost port)))
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(when process
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;; There's a load of info printed that needs deleting.
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(let ((again 't))
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;; repeat until
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;; - either we received the +OK line
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;; - or accept-process-output timed out without getting
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;; anything
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(while (and again
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(setq again (memq (process-status process)
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'(open run))))
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(setq again (pop3-accept-process-output process))
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(goto-char (point-max))
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(forward-line -1)
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(cond ((looking-at "\\+OK")
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(setq again nil)
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(delete-region (point-min) (point)))
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((not again)
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(pop3-quit process)
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(error "POP SSL connexion failed")))))
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process)))
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((eq pop3-stream-type 'starttls)
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;; gnutls-cli, openssl don't accept service names
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(if (equal port "pop3")
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(setq port 110))
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(let ((process (starttls-open-stream "POP" (current-buffer)
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mailhost (or port 110))))
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(pop3-send-command process "STLS")
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(let ((response (pop3-read-response process t)))
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(if (and response (string-match "+OK" response))
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(starttls-negotiate process)
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(pop3-quit process)
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(error "POP server doesn't support starttls")))
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process))
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(t
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(open-network-stream "POP" (current-buffer) mailhost port))))
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(let ((response (pop3-read-response process t)))
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(setq pop3-timestamp
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(substring response (or (string-match "<" response) 0)
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(+ 1 (or (string-match ">" response) -1)))))
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(pop3-set-process-query-on-exit-flag process nil)
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process)))
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;; Support functions
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(defun pop3-send-command (process command)
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(set-buffer (process-buffer process))
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(goto-char (point-max))
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;; (if (= (aref command 0) ?P)
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;; (insert "PASS <omitted>\r\n")
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;; (insert command "\r\n"))
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(setq pop3-read-point (point))
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(goto-char (point-max))
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(process-send-string process (concat command "\r\n")))
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(defun pop3-read-response (process &optional return)
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"Read the response from the server.
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Return the response string if optional second argument is non-nil."
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(let ((case-fold-search nil)
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match-end)
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(with-current-buffer (process-buffer process)
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(goto-char pop3-read-point)
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(while (and (memq (process-status process) '(open run))
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(not (search-forward "\r\n" nil t)))
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(pop3-accept-process-output process)
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(goto-char pop3-read-point))
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(setq match-end (point))
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(goto-char pop3-read-point)
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(if (looking-at "-ERR")
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(error "%s" (buffer-substring (point) (- match-end 2)))
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(if (not (looking-at "+OK"))
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(progn (setq pop3-read-point match-end) nil)
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(setq pop3-read-point match-end)
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(if return
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(buffer-substring (point) match-end)
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t)
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)))))
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(defun pop3-clean-region (start end)
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(setq end (set-marker (make-marker) end))
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(save-excursion
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(goto-char start)
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(while (and (< (point) end) (search-forward "\r\n" end t))
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(replace-match "\n" t t))
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(goto-char start)
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(while (and (< (point) end) (re-search-forward "^\\." end t))
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(replace-match "" t t)
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(forward-char)))
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(set-marker end nil))
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;; Copied from message-make-date.
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(defun pop3-make-date (&optional now)
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"Make a valid date header.
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If NOW, use that time instead."
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(require 'parse-time)
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(let* ((now (or now (current-time)))
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(zone (nth 8 (decode-time now)))
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(sign "+"))
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(when (< zone 0)
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(setq sign "-")
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(setq zone (- zone)))
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(concat
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(format-time-string "%d" now)
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;; The month name of the %b spec is locale-specific. Pfff.
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(format " %s "
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(capitalize (car (rassoc (nth 4 (decode-time now))
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parse-time-months))))
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(format-time-string "%Y %H:%M:%S " now)
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;; We do all of this because XEmacs doesn't have the %z spec.
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(format "%s%02d%02d" sign (/ zone 3600) (/ (% zone 3600) 60)))))
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(defun pop3-munge-message-separator (start end)
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"Check to see if a message separator exists. If not, generate one."
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(save-excursion
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(save-restriction
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(narrow-to-region start end)
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(goto-char (point-min))
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(if (not (or (looking-at "From .?") ; Unix mail
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(looking-at "\001\001\001\001\n") ; MMDF
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(looking-at "BABYL OPTIONS:") ; Babyl
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))
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(let* ((from (mail-strip-quoted-names (mail-fetch-field "From")))
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(tdate (mail-fetch-field "Date"))
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(date (split-string (or (and tdate
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(not (string= "" tdate))
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tdate)
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(pop3-make-date))
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" "))
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(From_))
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;; sample date formats I have seen
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;; Date: Tue, 9 Jul 1996 09:04:21 -0400 (EDT)
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;; Date: 08 Jul 1996 23:22:24 -0400
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;; should be
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;; Tue Jul 9 09:04:21 1996
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;; Fixme: This should use timezone on the date field contents.
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(setq date
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(cond ((not date)
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"Tue Jan 1 00:00:0 1900")
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((string-match "[A-Z]" (nth 0 date))
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(format "%s %s %s %s %s"
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(nth 0 date) (nth 2 date) (nth 1 date)
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(nth 4 date) (nth 3 date)))
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(t
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;; this really needs to be better but I don't feel
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;; like writing a date to day converter.
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(format "Sun %s %s %s %s"
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(nth 1 date) (nth 0 date)
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(nth 3 date) (nth 2 date)))
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))
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(setq From_ (format "\nFrom %s %s\n" from date))
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(while (string-match "," From_)
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(setq From_ (concat (substring From_ 0 (match-beginning 0))
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(substring From_ (match-end 0)))))
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(goto-char (point-min))
|
||
(insert From_)
|
||
(if (search-forward "\n\n" nil t)
|
||
nil
|
||
(goto-char (point-max))
|
||
(insert "\n"))
|
||
(let ((size (- (point-max) (point))))
|
||
(forward-line -1)
|
||
(insert (format "Content-Length: %s\n" size)))
|
||
)))))
|
||
|
||
;; The Command Set
|
||
|
||
;; AUTHORIZATION STATE
|
||
|
||
(defun pop3-user (process user)
|
||
"Send USER information to POP3 server."
|
||
(pop3-send-command process (format "USER %s" user))
|
||
(let ((response (pop3-read-response process t)))
|
||
(if (not (and response (string-match "+OK" response)))
|
||
(error "USER %s not valid" user))))
|
||
|
||
(defun pop3-pass (process)
|
||
"Send authentication information to the server."
|
||
(pop3-send-command process (format "PASS %s" pop3-password))
|
||
(let ((response (pop3-read-response process t)))
|
||
(if (not (and response (string-match "+OK" response)))
|
||
(pop3-quit process))))
|
||
|
||
(defun pop3-apop (process user)
|
||
"Send alternate authentication information to the server."
|
||
(let ((pass pop3-password))
|
||
(if (and pop3-password-required (not pass))
|
||
(setq pass
|
||
(read-passwd (format "Password for %s: " pop3-maildrop))))
|
||
(if pass
|
||
(let ((hash (md5 (concat pop3-timestamp pass) nil nil 'binary)))
|
||
(pop3-send-command process (format "APOP %s %s" user hash))
|
||
(let ((response (pop3-read-response process t)))
|
||
(if (not (and response (string-match "+OK" response)))
|
||
(pop3-quit process)))))
|
||
))
|
||
|
||
;; TRANSACTION STATE
|
||
|
||
(defun pop3-stat (process)
|
||
"Return the number of messages in the maildrop and the maildrop's size."
|
||
(pop3-send-command process "STAT")
|
||
(let ((response (pop3-read-response process t)))
|
||
(list (string-to-number (nth 1 (split-string response " ")))
|
||
(string-to-number (nth 2 (split-string response " "))))
|
||
))
|
||
|
||
(defun pop3-list (process &optional msg)
|
||
"If MSG is nil, return an alist of (MESSAGE-ID . SIZE) pairs.
|
||
Otherwise, return the size of the message-id MSG"
|
||
(pop3-send-command process (if msg
|
||
(format "LIST %d" msg)
|
||
"LIST"))
|
||
(let ((response (pop3-read-response process t)))
|
||
(if msg
|
||
(string-to-number (nth 2 (split-string response " ")))
|
||
(let ((start pop3-read-point) end)
|
||
(with-current-buffer (process-buffer process)
|
||
(while (not (re-search-forward "^\\.\r\n" nil t))
|
||
(pop3-accept-process-output process)
|
||
(goto-char start))
|
||
(setq pop3-read-point (point-marker))
|
||
(goto-char (match-beginning 0))
|
||
(setq end (point-marker))
|
||
(mapcar #'(lambda (s) (let ((split (split-string s " ")))
|
||
(cons (string-to-number (nth 0 split))
|
||
(string-to-number (nth 1 split)))))
|
||
(split-string (buffer-substring start end) "\r\n" t)))))))
|
||
|
||
(defun pop3-retr (process msg crashbuf)
|
||
"Retrieve message-id MSG to buffer CRASHBUF."
|
||
(pop3-send-command process (format "RETR %s" msg))
|
||
(pop3-read-response process)
|
||
(let ((start pop3-read-point) end)
|
||
(with-current-buffer (process-buffer process)
|
||
(while (not (re-search-forward "^\\.\r\n" nil t))
|
||
(pop3-accept-process-output process)
|
||
(goto-char start))
|
||
(setq pop3-read-point (point-marker))
|
||
;; this code does not seem to work for some POP servers...
|
||
;; and I cannot figure out why not.
|
||
;; (goto-char (match-beginning 0))
|
||
;; (backward-char 2)
|
||
;; (if (not (looking-at "\r\n"))
|
||
;; (insert "\r\n"))
|
||
;; (re-search-forward "\\.\r\n")
|
||
(goto-char (match-beginning 0))
|
||
(setq end (point-marker))
|
||
(pop3-clean-region start end)
|
||
(pop3-munge-message-separator start end)
|
||
(with-current-buffer crashbuf
|
||
(erase-buffer))
|
||
(copy-to-buffer crashbuf start end)
|
||
(delete-region start end)
|
||
)))
|
||
|
||
(defun pop3-dele (process msg)
|
||
"Mark message-id MSG as deleted."
|
||
(pop3-send-command process (format "DELE %s" msg))
|
||
(pop3-read-response process))
|
||
|
||
(defun pop3-noop (process msg)
|
||
"No-operation."
|
||
(pop3-send-command process "NOOP")
|
||
(pop3-read-response process))
|
||
|
||
(defun pop3-last (process)
|
||
"Return highest accessed message-id number for the session."
|
||
(pop3-send-command process "LAST")
|
||
(let ((response (pop3-read-response process t)))
|
||
(string-to-number (nth 1 (split-string response " ")))
|
||
))
|
||
|
||
(defun pop3-rset (process)
|
||
"Remove all delete marks from current maildrop."
|
||
(pop3-send-command process "RSET")
|
||
(pop3-read-response process))
|
||
|
||
;; UPDATE
|
||
|
||
(defun pop3-quit (process)
|
||
"Close connection to POP3 server.
|
||
Tell server to remove all messages marked as deleted, unlock the maildrop,
|
||
and close the connection."
|
||
(pop3-send-command process "QUIT")
|
||
(pop3-read-response process t)
|
||
(if process
|
||
(with-current-buffer (process-buffer process)
|
||
(goto-char (point-max))
|
||
(delete-process process))))
|
||
|
||
;; Summary of POP3 (Post Office Protocol version 3) commands and responses
|
||
|
||
;;; AUTHORIZATION STATE
|
||
|
||
;; Initial TCP connection
|
||
;; Arguments: none
|
||
;; Restrictions: none
|
||
;; Possible responses:
|
||
;; +OK [POP3 server ready]
|
||
|
||
;; USER name
|
||
;; Arguments: a server specific user-id (required)
|
||
;; Restrictions: authorization state [after unsuccessful USER or PASS
|
||
;; Possible responses:
|
||
;; +OK [valid user-id]
|
||
;; -ERR [invalid user-id]
|
||
|
||
;; PASS string
|
||
;; Arguments: a server/user-id specific password (required)
|
||
;; Restrictions: authorization state, after successful USER
|
||
;; Possible responses:
|
||
;; +OK [maildrop locked and ready]
|
||
;; -ERR [invalid password]
|
||
;; -ERR [unable to lock maildrop]
|
||
|
||
;; STLS (RFC 2595)
|
||
;; Arguments: none
|
||
;; Restrictions: Only permitted in AUTHORIZATION state.
|
||
;; Possible responses:
|
||
;; +OK
|
||
;; -ERR
|
||
|
||
;;; TRANSACTION STATE
|
||
|
||
;; STAT
|
||
;; Arguments: none
|
||
;; Restrictions: transaction state
|
||
;; Possible responses:
|
||
;; +OK nn mm [# of messages, size of maildrop]
|
||
|
||
;; LIST [msg]
|
||
;; Arguments: a message-id (optional)
|
||
;; Restrictions: transaction state; msg must not be deleted
|
||
;; Possible responses:
|
||
;; +OK [scan listing follows]
|
||
;; -ERR [no such message]
|
||
|
||
;; RETR msg
|
||
;; Arguments: a message-id (required)
|
||
;; Restrictions: transaction state; msg must not be deleted
|
||
;; Possible responses:
|
||
;; +OK [message contents follow]
|
||
;; -ERR [no such message]
|
||
|
||
;; DELE msg
|
||
;; Arguments: a message-id (required)
|
||
;; Restrictions: transaction state; msg must not be deleted
|
||
;; Possible responses:
|
||
;; +OK [message deleted]
|
||
;; -ERR [no such message]
|
||
|
||
;; NOOP
|
||
;; Arguments: none
|
||
;; Restrictions: transaction state
|
||
;; Possible responses:
|
||
;; +OK
|
||
|
||
;; LAST
|
||
;; Arguments: none
|
||
;; Restrictions: transaction state
|
||
;; Possible responses:
|
||
;; +OK nn [highest numbered message accessed]
|
||
|
||
;; RSET
|
||
;; Arguments: none
|
||
;; Restrictions: transaction state
|
||
;; Possible responses:
|
||
;; +OK [all delete marks removed]
|
||
|
||
;;; UPDATE STATE
|
||
|
||
;; QUIT
|
||
;; Arguments: none
|
||
;; Restrictions: none
|
||
;; Possible responses:
|
||
;; +OK [TCP connection closed]
|
||
|
||
(provide 'pop3)
|
||
|
||
;;; pop3.el ends here
|