--- /dev/null
+;;; nntp.el --- nntp access for Gnus
+
+;; Copyright (C) 1987-1990, 1992-1998, 2000-2016 Free Software
+;; Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Keywords: news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(eval-and-compile
+ ;; In Emacs 24, `open-protocol-stream' is an autoloaded alias for
+ ;; `make-network-stream'.
+ (unless (fboundp 'open-protocol-stream)
+ (require 'proto-stream)))
+
+(require 'nnheader)
+(require 'nnoo)
+(require 'gnus-util)
+(require 'gnus)
+(require 'gnus-group) ;; gnus-group-name-charset
+
+(nnoo-declare nntp)
+
+(eval-when-compile (require 'cl))
+
+(autoload 'auth-source-search "auth-source")
+
+(defgroup nntp nil
+ "NNTP access for Gnus."
+ :group 'gnus)
+
+(defvoo nntp-address nil
+ "Address of the physical nntp server.")
+
+(defvoo nntp-port-number "nntp"
+ "Port number on the physical nntp server.")
+
+(defvoo nntp-server-opened-hook '(nntp-send-mode-reader)
+ "*Hook used for sending commands to the server at startup.
+The default value is `nntp-send-mode-reader', which makes an innd
+server spawn an nnrpd server.")
+
+(defvoo nntp-authinfo-function 'nntp-send-authinfo
+ "Function used to send AUTHINFO to the server.
+It is called with no parameters.")
+
+(defvoo nntp-server-action-alist
+ '(("nntpd 1\\.5\\.11t"
+ (remove-hook 'nntp-server-opened-hook 'nntp-send-mode-reader))
+ ("NNRP server Netscape"
+ (setq nntp-server-list-active-group nil)))
+ "Alist of regexps to match on server types and actions to be taken.
+For instance, if you want Gnus to beep every time you connect
+to innd, you could say something like:
+
+\(setq nntp-server-action-alist
+ \\='((\"innd\" (ding))))
+
+You probably don't want to do that, though.")
+
+(defvoo nntp-open-connection-function 'nntp-open-network-stream
+ "Method for connecting to a remote system.
+It should be a function, which is called with the output buffer
+as its single argument, or one of the following special values:
+
+- `nntp-open-network-stream' specifies a network connection,
+ upgrading to a TLS connection via STARTTLS if possible.
+- `nntp-open-plain-stream' specifies an unencrypted network
+ connection (no STARTTLS upgrade is attempted).
+- `nntp-open-ssl-stream' or `nntp-open-tls-stream' specify a TLS
+ network connection.
+
+Apart from the above special values, valid functions are as
+follows; please refer to their respective doc string for more
+information.
+For direct connections:
+- `nntp-open-netcat-stream'
+- `nntp-open-telnet-stream'
+For indirect connections:
+- `nntp-open-via-rlogin-and-netcat'
+- `nntp-open-via-rlogin-and-telnet'
+- `nntp-open-via-telnet-and-telnet'")
+
+(defvoo nntp-never-echoes-commands nil
+ "*Non-nil means the nntp server never echoes commands.
+It is reported that some nntps server doesn't echo commands. So, you
+may want to set this to non-nil in the method for such a server setting
+`nntp-open-connection-function' to `nntp-open-ssl-stream' for example.
+Note that the `nntp-open-connection-functions-never-echo-commands'
+variable overrides the nil value of this variable.")
+
+(defvoo nntp-open-connection-functions-never-echo-commands
+ '(nntp-open-network-stream)
+ "*List of functions that never echo commands.
+Add or set a function which you set to `nntp-open-connection-function'
+to this list if it does not echo commands. Note that a non-nil value
+of the `nntp-never-echoes-commands' variable overrides this variable.")
+
+(defvoo nntp-pre-command nil
+ "*Pre-command to use with the various nntp-open-via-* methods.
+This is where you would put \"runsocks\" or stuff like that.")
+
+(defvoo nntp-telnet-command "telnet"
+ "*Telnet command used to connect to the nntp server.
+This command is used by the methods `nntp-open-telnet-stream',
+`nntp-open-via-rlogin-and-telnet' and `nntp-open-via-telnet-and-telnet'.")
+
+(defvoo nntp-telnet-switches '("-8")
+ "*Switches given to the telnet command `nntp-telnet-command'.")
+
+(defvoo nntp-end-of-line "\r\n"
+ "*String to use on the end of lines when talking to the NNTP server.
+This is \"\\r\\n\" by default, but should be \"\\n\" when using an indirect
+connection method (nntp-open-via-*).")
+
+(defvoo nntp-via-rlogin-command "rsh"
+ "*Rlogin command used to connect to an intermediate host.
+This command is used by the methods `nntp-open-via-rlogin-and-telnet'
+and `nntp-open-via-rlogin-and-netcat'. The default is \"rsh\", but \"ssh\"
+is a popular alternative.")
+
+(defvoo nntp-via-rlogin-command-switches nil
+ "*Switches given to the rlogin command `nntp-via-rlogin-command'.
+If you use \"ssh\" for `nntp-via-rlogin-command', you may set this to
+\(\"-C\") in order to compress all data connections, otherwise set this
+to \(\"-t\" \"-e\" \"none\") or (\"-C\" \"-t\" \"-e\" \"none\") if the telnet
+command requires a pseudo-tty allocation on an intermediate host.")
+
+(defvoo nntp-via-telnet-command "telnet"
+ "*Telnet command used to connect to an intermediate host.
+This command is used by the `nntp-open-via-telnet-and-telnet' method.")
+
+(defvoo nntp-via-telnet-switches '("-8")
+ "*Switches given to the telnet command `nntp-via-telnet-command'.")
+
+(defvoo nntp-netcat-command "nc"
+ "*Netcat command used to connect to the nntp server.
+This command is used by the `nntp-open-netcat-stream' and
+`nntp-open-via-rlogin-and-netcat' methods.")
+
+(defvoo nntp-netcat-switches nil
+ "*Switches given to the netcat command `nntp-netcat-command'.")
+
+(defvoo nntp-via-user-name nil
+ "*User name to log in on an intermediate host with.
+This variable is used by the various nntp-open-via-* methods.")
+
+(defvoo nntp-via-user-password nil
+ "*Password to use to log in on an intermediate host with.
+This variable is used by the `nntp-open-via-telnet-and-telnet' method.")
+
+(defvoo nntp-via-address nil
+ "*Address of an intermediate host to connect to.
+This variable is used by the various nntp-open-via-* methods.")
+
+(defvoo nntp-via-envuser nil
+ "*Whether both telnet client and server support the ENVIRON option.
+If non-nil, there will be no prompt for a login name.")
+
+(defvoo nntp-via-shell-prompt "bash\\|[$>] *\r?$"
+ "*Regular expression to match the shell prompt on an intermediate host.
+This variable is used by the `nntp-open-via-telnet-and-telnet' method.")
+
+(defvoo nntp-large-newsgroup 50
+ "*The number of articles which indicates a large newsgroup.
+If the number of articles is greater than the value, verbose
+messages will be shown to indicate the current status.")
+
+(defvoo nntp-maximum-request 400
+ "*The maximum number of the requests sent to the NNTP server at one time.
+If Emacs hangs up while retrieving headers, set the variable to a
+lower value.")
+
+(defvoo nntp-nov-is-evil nil
+ "*If non-nil, nntp will never attempt to use XOVER when talking to the server.")
+
+(defvoo nntp-xover-commands '("XOVER" "XOVERVIEW")
+ "*List of strings that are used as commands to fetch NOV lines from a server.
+The strings are tried in turn until a positive response is gotten. If
+none of the commands are successful, nntp will just grab headers one
+by one.")
+
+(defvoo nntp-nov-gap 5
+ "*Maximum allowed gap between two articles.
+If the gap between two consecutive articles is bigger than this
+variable, split the XOVER request into two requests.")
+
+(defvoo nntp-xref-number-is-evil nil
+ "*If non-nil, Gnus never trusts article numbers in the Xref header.
+Some news servers, e.g., ones running Diablo, run multiple engines
+having the same articles but article numbers are not kept synchronized
+between them. If you connect to such a server, set this to a non-nil
+value, and Gnus never uses article numbers (that appear in the Xref
+header and vary by which engine is chosen) to refer to articles.")
+
+(defvoo nntp-prepare-server-hook nil
+ "*Hook run before a server is opened.
+If can be used to set up a server remotely, for instance. Say you
+have an account at the machine \"other.machine\". This machine has
+access to an NNTP server that you can't access locally. You could
+then use this hook to rsh to the remote machine and start a proxy NNTP
+server there that you can connect to. See also
+`nntp-open-connection-function'")
+
+(defcustom nntp-authinfo-file "~/.authinfo"
+ ".netrc-like file that holds nntp authinfo passwords."
+ :group 'nntp
+ :type
+ '(choice file
+ (repeat :tag "Entries"
+ :menu-tag "Inline"
+ (list :format "%v"
+ :value ("" ("login" . "") ("password" . ""))
+ (string :tag "Host")
+ (checklist :inline t
+ (cons :format "%v"
+ (const :format "" "login")
+ (string :format "Login: %v"))
+ (cons :format "%v"
+ (const :format "" "password")
+ (string :format "Password: %v")))))))
+
+(make-obsolete 'nntp-authinfo-file nil "Emacs 24.1")
+
+\f
+
+(defvoo nntp-connection-timeout nil
+ "*Number of seconds to wait before an nntp connection times out.
+If this variable is nil, which is the default, no timers are set.
+NOTE: This variable is never seen to work in Emacs 20 and XEmacs 21.")
+
+(defvoo nntp-prepare-post-hook nil
+ "*Hook run just before posting an article. It is supposed to be used
+to insert Cancel-Lock headers.")
+
+(defvoo nntp-server-list-active-group 'try
+ "If nil, then always use GROUP instead of LIST ACTIVE.
+This is usually slower, but on misconfigured servers that don't
+update their active files often, this can help.")
+
+;;; Internal variables.
+
+(defvoo nntp-retrieval-in-progress nil)
+(defvar nntp-record-commands nil
+ "*If non-nil, nntp will record all commands in the \"*nntp-log*\" buffer.")
+
+(defvar nntp-have-messaged nil)
+
+(defvar nntp-process-wait-for nil)
+(defvar nntp-process-to-buffer nil)
+(defvar nntp-process-callback nil)
+(defvar nntp-process-decode nil)
+(defvar nntp-process-start-point nil)
+(defvar nntp-inside-change-function nil)
+(defvoo nntp-last-command-time nil)
+(defvoo nntp-last-command nil)
+(defvoo nntp-authinfo-password nil)
+(defvoo nntp-authinfo-user nil)
+(defvoo nntp-authinfo-force nil)
+
+(defvar nntp-connection-list nil)
+
+(defvoo nntp-server-type nil)
+(defvoo nntp-connection-alist nil)
+(defvoo nntp-status-string "")
+(defconst nntp-version "nntp 5.0")
+(defvoo nntp-inhibit-erase nil)
+(defvoo nntp-inhibit-output nil)
+
+(defvoo nntp-server-xover 'try)
+
+(defvar nntp-async-timer nil)
+(defvar nntp-async-process-list nil)
+
+(defvar nntp-authinfo-rejected nil
+"A custom error condition used to report `Authentication Rejected' errors.
+Condition handlers that match just this condition ensure that the nntp
+backend doesn't catch this error.")
+(put 'nntp-authinfo-rejected 'error-conditions '(error nntp-authinfo-rejected))
+(put 'nntp-authinfo-rejected 'error-message "Authorization Rejected")
+
+\f
+
+;;; Internal functions.
+
+(defsubst nntp-send-string (process string)
+ "Send STRING to PROCESS."
+ ;; We need to store the time to provide timeouts, and
+ ;; to store the command so the we can replay the command
+ ;; if the server gives us an AUTHINFO challenge.
+ (setq nntp-last-command-time (current-time)
+ nntp-last-command string)
+ (when nntp-record-commands
+ (nntp-record-command string))
+ (process-send-string process (concat string nntp-end-of-line))
+ (or (memq (process-status process) '(open run))
+ (nntp-report "Server closed connection")))
+
+(defun nntp-record-command (string)
+ "Record the command STRING."
+ (with-current-buffer (get-buffer-create "*nntp-log*")
+ (goto-char (point-max))
+ (insert (format-time-string "%Y%m%dT%H%M%S.%3N")
+ " " nntp-address " " string "\n")))
+
+(defvar nntp--report-1 nil)
+
+(defun nntp-report (&rest args)
+ "Report an error from the nntp backend. The first string in ARGS
+can be a format string. For some commands, the failed command may be
+retried once before actually displaying the error report."
+ (if nntp--report-1
+ (progn
+ ;; Throw out to nntp-with-open-group-error so that the connection may
+ ;; be restored and the command retried."
+ (when nntp-record-commands
+ (nntp-record-command "*** CONNECTION LOST ***"))
+ (throw 'nntp-with-open-group-error t))
+
+ (when nntp-record-commands
+ (nntp-record-command "*** CALLED nntp-report ***"))
+
+ (nnheader-report 'nntp args)
+
+ (apply 'error args)))
+
+(defmacro nntp-copy-to-buffer (buffer start end)
+ "Copy string from unibyte current buffer to multibyte buffer."
+ (if (featurep 'xemacs)
+ `(copy-to-buffer ,buffer ,start ,end)
+ `(let ((string (buffer-substring ,start ,end)))
+ (with-current-buffer ,buffer
+ (erase-buffer)
+ (insert (if enable-multibyte-characters
+ (mm-string-to-multibyte string)
+ string))
+ (goto-char (point-min))
+ nil))))
+
+(defsubst nntp-wait-for (process wait-for buffer &optional decode discard)
+ "Wait for WAIT-FOR to arrive from PROCESS."
+
+ (with-current-buffer (process-buffer process)
+ (goto-char (point-min))
+
+ (while (and (or (not (memq (char-after (point)) '(?2 ?3 ?4 ?5)))
+ (looking-at "48[02]"))
+ (memq (process-status process) '(open run)))
+ (cond ((looking-at "480")
+ (nntp-handle-authinfo process))
+ ((looking-at "482")
+ (nnheader-report 'nntp "%s"
+ (get 'nntp-authinfo-rejected 'error-message))
+ (signal 'nntp-authinfo-rejected nil))
+ ((looking-at "^.*\n")
+ (delete-region (point) (progn (forward-line 1) (point)))))
+ (nntp-accept-process-output process)
+ (goto-char (point-min)))
+ (prog1
+ (cond
+ ((looking-at "[45]")
+ (progn
+ (nntp-snarf-error-message)
+ nil))
+ ((not (memq (process-status process) '(open run)))
+ (nntp-report "Server closed connection"))
+ (t
+ (goto-char (point-max))
+ (let ((limit (point-min))
+ response)
+ (while (not (re-search-backward wait-for limit t))
+ (nntp-accept-process-output process)
+ ;; We assume that whatever we wait for is less than 1000
+ ;; characters long.
+ (setq limit (max (- (point-max) 1000) (point-min)))
+ (goto-char (point-max)))
+ (setq response (match-string 0))
+ (with-current-buffer nntp-server-buffer
+ (setq nntp-process-response response)))
+ (nntp-decode-text (not decode))
+ (unless discard
+ (with-current-buffer buffer
+ (goto-char (point-max))
+ (nnheader-insert-buffer-substring (process-buffer process))
+ ;; Nix out "nntp reading...." message.
+ (when nntp-have-messaged
+ (setq nntp-have-messaged nil)
+ (nnheader-message 5 ""))))
+ t))
+ (unless discard
+ (erase-buffer)))))
+
+(defun nntp-kill-buffer (buffer)
+ (when (buffer-name buffer)
+ (let ((process (get-buffer-process buffer)))
+ (when process
+ (delete-process process)))
+ (kill-buffer buffer)
+ (nnheader-init-server-buffer)))
+
+(defun nntp-erase-buffer (buffer)
+ "Erase contents of BUFFER."
+ (with-current-buffer buffer
+ (erase-buffer)))
+
+(defsubst nntp-find-connection (buffer)
+ "Find the connection delivering to BUFFER."
+ (let ((alist nntp-connection-alist)
+ (buffer (if (stringp buffer) (get-buffer buffer) buffer))
+ process entry)
+ (while (and alist (setq entry (pop alist)))
+ (when (eq buffer (cadr entry))
+ (setq process (car entry)
+ alist nil)))
+ (when process
+ (if (memq (process-status process) '(open run))
+ process
+ (nntp-kill-buffer (process-buffer process))
+ (setq nntp-connection-alist (delq entry nntp-connection-alist))
+ nil))))
+
+(defsubst nntp-find-connection-entry (buffer)
+ "Return the entry for the connection to BUFFER."
+ (assq (nntp-find-connection buffer) nntp-connection-alist))
+
+(defun nntp-find-connection-buffer (buffer)
+ "Return the process connection buffer tied to BUFFER."
+ (let ((process (nntp-find-connection buffer)))
+ (when process
+ (process-buffer process))))
+
+(defsubst nntp-retrieve-data (command address port buffer
+ &optional wait-for callback decode)
+ "Use COMMAND to retrieve data into BUFFER from PORT on ADDRESS."
+ (let ((process (or (nntp-find-connection buffer)
+ (nntp-open-connection buffer))))
+ (if process
+ (progn
+ (unless (or nntp-inhibit-erase nnheader-callback-function)
+ (nntp-erase-buffer (process-buffer process)))
+ (condition-case err
+ (progn
+ (when command
+ (nntp-send-string process command))
+ (cond
+ ((eq callback 'ignore)
+ t)
+ ((and callback wait-for)
+ (nntp-async-wait process wait-for buffer decode callback)
+ t)
+ (wait-for
+ (nntp-wait-for process wait-for buffer decode))
+ (t t)))
+ (nntp-authinfo-rejected
+ (signal 'nntp-authinfo-rejected (cdr err)))
+ (error
+ (nnheader-report 'nntp "Couldn't open connection to %s: %s"
+ address err))
+ (quit
+ (message "Quit retrieving data from nntp")
+ (signal 'quit nil)
+ nil)))
+ (nnheader-report 'nntp "Couldn't open connection to %s" address))))
+
+(defsubst nntp-send-command (wait-for &rest strings)
+ "Send STRINGS to server and wait until WAIT-FOR returns."
+ (when (and (not nnheader-callback-function)
+ (not nntp-inhibit-output))
+ (nntp-erase-buffer nntp-server-buffer))
+ (let* ((command (mapconcat 'identity strings " "))
+ (process (nntp-find-connection nntp-server-buffer))
+ (buffer (and process (process-buffer process)))
+ (pos (and buffer (with-current-buffer buffer (point)))))
+ (if process
+ (prog1
+ (nntp-retrieve-data command
+ nntp-address nntp-port-number
+ nntp-server-buffer
+ wait-for nnheader-callback-function)
+ ;; If nothing to wait for, still remove possibly echo'ed commands.
+ ;; We don't have echoes if `nntp-never-echoes-commands' is non-nil
+ ;; or the value of `nntp-open-connection-function' is in
+ ;; `nntp-open-connection-functions-never-echo-commands', so we
+ ;; skip this in that cases.
+ (unless (or wait-for
+ nntp-never-echoes-commands
+ (memq
+ nntp-open-connection-function
+ nntp-open-connection-functions-never-echo-commands))
+ (nntp-accept-response)
+ (with-current-buffer buffer
+ (goto-char pos)
+ (if (looking-at (regexp-quote command))
+ (delete-region pos (progn (forward-line 1)
+ (point-at-bol)))))))
+ (nnheader-report 'nntp "Couldn't open connection to %s."
+ nntp-address))))
+
+(defun nntp-send-command-nodelete (wait-for &rest strings)
+ "Send STRINGS to server and wait until WAIT-FOR returns."
+ (let* ((command (mapconcat 'identity strings " "))
+ (process (nntp-find-connection nntp-server-buffer))
+ (buffer (and process (process-buffer process)))
+ (pos (and buffer (with-current-buffer buffer (point)))))
+ (if process
+ (prog1
+ (nntp-retrieve-data command
+ nntp-address nntp-port-number
+ nntp-server-buffer
+ wait-for nnheader-callback-function)
+ ;; If nothing to wait for, still remove possibly echo'ed commands
+ (unless wait-for
+ (nntp-accept-response)
+ (with-current-buffer buffer
+ (goto-char pos)
+ (if (looking-at (regexp-quote command))
+ (delete-region pos (progn (forward-line 1)
+ (point-at-bol)))))))
+ (nnheader-report 'nntp "Couldn't open connection to %s."
+ nntp-address))))
+
+(defun nntp-send-command-and-decode (wait-for &rest strings)
+ "Send STRINGS to server and wait until WAIT-FOR returns."
+ (when (and (not nnheader-callback-function)
+ (not nntp-inhibit-output))
+ (nntp-erase-buffer nntp-server-buffer))
+ (let* ((command (mapconcat 'identity strings " "))
+ (process (nntp-find-connection nntp-server-buffer))
+ (buffer (and process (process-buffer process)))
+ (pos (and buffer (with-current-buffer buffer (point)))))
+ (if process
+ (prog1
+ (nntp-retrieve-data command
+ nntp-address nntp-port-number
+ nntp-server-buffer
+ wait-for nnheader-callback-function t)
+ ;; If nothing to wait for, still remove possibly echo'ed commands
+ (unless wait-for
+ (nntp-accept-response)
+ (with-current-buffer buffer
+ (goto-char pos)
+ (if (looking-at (regexp-quote command))
+ (delete-region pos (progn (forward-line 1) (point-at-bol))))
+ )))
+ (nnheader-report 'nntp "Couldn't open connection to %s."
+ nntp-address))))
+
+
+(defun nntp-send-buffer (wait-for)
+ "Send the current buffer to server and wait until WAIT-FOR returns."
+ (when (and (not nnheader-callback-function)
+ (not nntp-inhibit-output))
+ (nntp-erase-buffer
+ (nntp-find-connection-buffer nntp-server-buffer)))
+ (nntp-encode-text)
+ ;; Make sure we did not forget to encode some of the content.
+ (assert (save-excursion (goto-char (point-min))
+ (not (re-search-forward "[^\000-\377]" nil t))))
+ (mm-disable-multibyte)
+ (process-send-region (nntp-find-connection nntp-server-buffer)
+ (point-min) (point-max))
+ (nntp-retrieve-data
+ nil nntp-address nntp-port-number nntp-server-buffer
+ wait-for nnheader-callback-function))
+
+\f
+
+;;; Interface functions.
+
+(nnoo-define-basics nntp)
+
+(defsubst nntp-next-result-arrived-p ()
+ (cond
+ ;; A result that starts with a 2xx code is terminated by
+ ;; a line with only a "." on it.
+ ((eq (char-after) ?2)
+ (if (re-search-forward "\n\\.\r?\n" nil t)
+ (progn
+ ;; Some broken news servers add another dot at the end.
+ ;; Protect against inflooping there.
+ (while (looking-at "^\\.\r?\n")
+ (forward-line 1))
+ t)
+ nil))
+ ;; A result that starts with a 3xx or 4xx code is terminated
+ ;; by a newline.
+ ((looking-at "[34]")
+ (if (search-forward "\n" nil t)
+ t
+ nil))
+ ;; No result here.
+ (t
+ nil)))
+
+(defun nntp-with-open-group-function (-group -server -connectionless -bodyfun)
+ "Protect against servers that don't like clients that keep idle connections opens.
+The problem being that these servers may either close a connection or
+simply ignore any further requests on a connection. Closed
+connections are not detected until `accept-process-output' has updated
+the `process-status'. Dropped connections are not detected until the
+connection timeouts (which may be several minutes) or
+`nntp-connection-timeout' has expired. When these occur
+`nntp-with-open-group', opens a new connection then re-issues the NNTP
+command whose response triggered the error."
+ (let ((nntp-report-n nntp--report-1)
+ (nntp--report-1 t)
+ (nntp-with-open-group-internal nil))
+ (while (catch 'nntp-with-open-group-error
+ ;; Open the connection to the server
+ ;; NOTE: Existing connections are NOT tested.
+ (nntp-possibly-change-group -group -server -connectionless)
+
+ (let ((-timer
+ (and nntp-connection-timeout
+ (run-at-time
+ nntp-connection-timeout nil
+ (lambda ()
+ (let* ((-process (nntp-find-connection
+ nntp-server-buffer))
+ (-buffer (and -process
+ (process-buffer -process))))
+ ;; When I an able to identify the
+ ;; connection to the server AND I've
+ ;; received NO response for
+ ;; nntp-connection-timeout seconds.
+ (when (and -buffer (eq 0 (buffer-size -buffer)))
+ ;; Close the connection. Take no
+ ;; other action as the accept input
+ ;; code will handle the closed
+ ;; connection.
+ (nntp-kill-buffer -buffer))))))))
+ (unwind-protect
+ (setq nntp-with-open-group-internal
+ (condition-case nil
+ (funcall -bodyfun)
+ (quit
+ (unless debug-on-quit
+ (nntp-close-server))
+ (signal 'quit nil))))
+ (when -timer
+ (nnheader-cancel-timer -timer)))
+ nil))
+ (setq nntp--report-1 nntp-report-n))
+ nntp-with-open-group-internal))
+
+(defmacro nntp-with-open-group (group server &optional connectionless &rest forms)
+ "Protect against servers that don't like clients that keep idle connections opens.
+The problem being that these servers may either close a connection or
+simply ignore any further requests on a connection. Closed
+connections are not detected until `accept-process-output' has updated
+the `process-status'. Dropped connections are not detected until the
+connection timeouts (which may be several minutes) or
+`nntp-connection-timeout' has expired. When these occur
+`nntp-with-open-group', opens a new connection then re-issues the NNTP
+command whose response triggered the error."
+ (declare (indent 2) (debug (form form [&optional symbolp] def-body)))
+ (when (and (listp connectionless)
+ (not (eq connectionless nil)))
+ (setq forms (cons connectionless forms)
+ connectionless nil))
+ `(nntp-with-open-group-function ,group ,server ,connectionless (lambda () ,@forms)))
+
+(deffoo nntp-retrieve-headers (articles &optional group server fetch-old)
+ "Retrieve the headers of ARTICLES."
+ (nntp-with-open-group
+ group server
+ (with-current-buffer (nntp-find-connection-buffer nntp-server-buffer)
+ (erase-buffer)
+ (if (and (not gnus-nov-is-evil)
+ (not nntp-nov-is-evil)
+ (nntp-retrieve-headers-with-xover articles fetch-old))
+ ;; We successfully retrieved the headers via XOVER.
+ 'nov
+ ;; XOVER didn't work, so we do it the hard, slow and inefficient
+ ;; way.
+ (let ((number (length articles))
+ (articles articles)
+ (count 0)
+ (received 0)
+ (last-point (point-min))
+ (buf (nntp-find-connection-buffer nntp-server-buffer))
+ (nntp-inhibit-erase t)
+ article)
+ ;; Send HEAD commands.
+ (while (setq article (pop articles))
+ (nntp-send-command
+ nil
+ "HEAD" (if (numberp article)
+ (int-to-string article)
+ ;; `articles' is either a list of article numbers
+ ;; or a list of article IDs.
+ article))
+ (incf count)
+ ;; Every 400 requests we have to read the stream in
+ ;; order to avoid deadlocks.
+ (when (or (null articles) ;All requests have been sent.
+ (zerop (% count nntp-maximum-request)))
+ (nntp-accept-response)
+ (while (progn
+ (set-buffer buf)
+ (goto-char last-point)
+ ;; Count replies.
+ (while (nntp-next-result-arrived-p)
+ (setq last-point (point))
+ (incf received))
+ (< received count))
+ ;; If number of headers is greater than 100, give
+ ;; informative messages.
+ (and (numberp nntp-large-newsgroup)
+ (> number nntp-large-newsgroup)
+ (zerop (% received 20))
+ (nnheader-message 6 "NNTP: Receiving headers... %d%%"
+ (floor (* received 100.0) number)))
+ (nntp-accept-response))))
+ (and (numberp nntp-large-newsgroup)
+ (> number nntp-large-newsgroup)
+ (nnheader-message 6 "NNTP: Receiving headers...done"))
+
+ ;; Now all of replies are received. Fold continuation lines.
+ (nnheader-fold-continuation-lines)
+ ;; Remove all "\r"'s.
+ (nnheader-strip-cr)
+ (nntp-copy-to-buffer nntp-server-buffer (point-min) (point-max))
+ 'headers)))))
+
+(deffoo nntp-retrieve-group-data-early (server infos)
+ "Retrieve group info on INFOS."
+ (nntp-with-open-group nil server
+ (let ((buffer (nntp-find-connection-buffer nntp-server-buffer)))
+ (unless infos
+ (with-current-buffer buffer
+ (setq nntp-retrieval-in-progress nil)))
+ (when (and buffer
+ infos
+ (with-current-buffer buffer
+ (not nntp-retrieval-in-progress)))
+ ;; The first time this is run, this variable is `try'. So we
+ ;; try.
+ (when (eq nntp-server-list-active-group 'try)
+ (nntp-try-list-active
+ (gnus-group-real-name (gnus-info-group (car infos)))))
+ (with-current-buffer buffer
+ (erase-buffer)
+ ;; Mark this buffer as "in use" in case we try to issue two
+ ;; retrievals from the same server. This shouldn't happen,
+ ;; so this is mostly a sanity check.
+ (setq nntp-retrieval-in-progress t)
+ (let ((nntp-inhibit-erase t)
+ (command (if nntp-server-list-active-group
+ "LIST ACTIVE" "GROUP")))
+ (dolist (info infos)
+ (nntp-send-command
+ nil command (gnus-group-real-name (gnus-info-group info)))))
+ (length infos))))))
+
+(deffoo nntp-finish-retrieve-group-infos (server infos count)
+ (nntp-with-open-group nil server
+ (let ((buf (nntp-find-connection-buffer nntp-server-buffer))
+ (method (gnus-find-method-for-group
+ (gnus-info-group (car infos))
+ (car infos)))
+ (received 0)
+ (last-point 1))
+ (with-current-buffer buf
+ (setq nntp-retrieval-in-progress nil))
+ (when (and buf
+ count)
+ (with-current-buffer buf
+ (while (and (gnus-buffer-live-p buf)
+ (progn
+ (goto-char last-point)
+ ;; Count replies.
+ (while (re-search-forward
+ (if nntp-server-list-active-group
+ "^[.]"
+ "^[0-9]")
+ nil t)
+ (incf received))
+ (setq last-point (point))
+ (< received count)))
+ (nntp-accept-response))
+ ;; We now have all the entries. Remove CRs.
+ (nnheader-strip-cr)
+ (if (not nntp-server-list-active-group)
+ (progn
+ (nntp-copy-to-buffer nntp-server-buffer
+ (point-min) (point-max))
+ (with-current-buffer nntp-server-buffer
+ (gnus-groups-to-gnus-format method gnus-active-hashtb t)))
+ ;; We have read active entries, so we just delete the
+ ;; superfluous gunk.
+ (goto-char (point-min))
+ (while (re-search-forward "^[.2-5]" nil t)
+ (delete-region (match-beginning 0)
+ (progn (forward-line 1) (point))))
+ (nntp-copy-to-buffer nntp-server-buffer (point-min) (point-max))
+ (with-current-buffer nntp-server-buffer
+ (gnus-active-to-gnus-format
+ ;; Kludge to use the extended method name if you have
+ ;; an extended one.
+ (if (consp (gnus-info-method (car infos)))
+ (gnus-info-method (car infos))
+ method)
+ gnus-active-hashtb nil t))))))))
+
+(deffoo nntp-retrieve-groups (groups &optional server)
+ "Retrieve group info on GROUPS."
+ (nntp-with-open-group
+ nil server
+ (when (and (nntp-find-connection-buffer nntp-server-buffer)
+ (with-current-buffer
+ (nntp-find-connection-buffer nntp-server-buffer)
+ (if (not nntp-retrieval-in-progress)
+ t
+ (message "Warning: Refusing to do retrieval from %s because a retrieval is already happening"
+ server)
+ nil)))
+ (catch 'done
+ (save-excursion
+ ;; Erase nntp-server-buffer before nntp-inhibit-erase.
+ (nntp-erase-buffer nntp-server-buffer)
+ (set-buffer (nntp-find-connection-buffer nntp-server-buffer))
+ ;; The first time this is run, this variable is `try'. So we
+ ;; try.
+ (when (eq nntp-server-list-active-group 'try)
+ (nntp-try-list-active (car groups)))
+ (erase-buffer)
+ (let ((count 0)
+ (groups groups)
+ (received 0)
+ (last-point (point-min))
+ (nntp-inhibit-erase t)
+ (buf (nntp-find-connection-buffer nntp-server-buffer))
+ (command (if nntp-server-list-active-group
+ "LIST ACTIVE" "GROUP")))
+ (while groups
+ ;; Timeout may have killed the buffer.
+ (unless (gnus-buffer-live-p buf)
+ (nnheader-report 'nntp "Connection to %s is closed." server)
+ (throw 'done nil))
+ ;; Send the command to the server.
+ (nntp-send-command nil command (pop groups))
+ (incf count)
+ ;; Every 400 requests we have to read the stream in
+ ;; order to avoid deadlocks.
+ (when (or (null groups) ;All requests have been sent.
+ (zerop (% count nntp-maximum-request)))
+ (nntp-accept-response)
+ (while (and (gnus-buffer-live-p buf)
+ (progn
+ ;; Search `blue moon' in this file for the
+ ;; reason why set-buffer here.
+ (set-buffer buf)
+ (goto-char last-point)
+ ;; Count replies.
+ (while (re-search-forward "^[0-9]" nil t)
+ (incf received))
+ (setq last-point (point))
+ (< received count)))
+ (nntp-accept-response))))
+
+ ;; Wait for the reply from the final command.
+ (unless (gnus-buffer-live-p buf)
+ (nnheader-report 'nntp "Connection to %s is closed." server)
+ (throw 'done nil))
+ (set-buffer buf)
+ (goto-char (point-max))
+ (re-search-backward "^[0-9]" nil t)
+ (when (looking-at "^[23]")
+ (while (and (gnus-buffer-live-p buf)
+ (progn
+ (set-buffer buf)
+ (goto-char (point-max))
+ (if (not nntp-server-list-active-group)
+ (not (re-search-backward "\r?\n"
+ (- (point) 3) t))
+ (not (re-search-backward "^\\.\r?\n"
+ (- (point) 4) t)))))
+ (nntp-accept-response)))
+
+ ;; Now all replies are received. We remove CRs.
+ (unless (gnus-buffer-live-p buf)
+ (nnheader-report 'nntp "Connection to %s is closed." server)
+ (throw 'done nil))
+ (set-buffer buf)
+ (goto-char (point-min))
+ (while (search-forward "\r" nil t)
+ (replace-match "" t t))
+
+ (if (not nntp-server-list-active-group)
+ (progn
+ (nntp-copy-to-buffer nntp-server-buffer
+ (point-min) (point-max))
+ 'group)
+ ;; We have read active entries, so we just delete the
+ ;; superfluous gunk.
+ (goto-char (point-min))
+ (while (re-search-forward "^[.2-5]" nil t)
+ (delete-region (match-beginning 0)
+ (progn (forward-line 1) (point))))
+ (nntp-copy-to-buffer nntp-server-buffer (point-min) (point-max))
+ 'active)))))))
+
+(deffoo nntp-retrieve-articles (articles &optional group server)
+ (nntp-with-open-group
+ group server
+ (save-excursion
+ (let ((number (length articles))
+ (articles articles)
+ (count 0)
+ (received 0)
+ (last-point (point-min))
+ (buf (nntp-find-connection-buffer nntp-server-buffer))
+ (nntp-inhibit-erase t)
+ (map (apply 'vector articles))
+ (point 1)
+ article)
+ (set-buffer buf)
+ (erase-buffer)
+ ;; Send ARTICLE command.
+ (while (setq article (pop articles))
+ (nntp-send-command
+ nil
+ "ARTICLE" (if (numberp article)
+ (int-to-string article)
+ ;; `articles' is either a list of article numbers
+ ;; or a list of article IDs.
+ article))
+ (incf count)
+ ;; Every 400 requests we have to read the stream in
+ ;; order to avoid deadlocks.
+ (when (or (null articles) ;All requests have been sent.
+ (zerop (% count nntp-maximum-request)))
+ (nntp-accept-response)
+ (while (progn
+ (set-buffer buf)
+ (goto-char last-point)
+ ;; Count replies.
+ (while (nntp-next-result-arrived-p)
+ (aset map received (cons (aref map received) (point)))
+ (setq last-point (point))
+ (incf received))
+ (< received count))
+ ;; If number of headers is greater than 100, give
+ ;; informative messages.
+ (and (numberp nntp-large-newsgroup)
+ (> number nntp-large-newsgroup)
+ (zerop (% received 20))
+ (nnheader-message 6 "NNTP: Receiving articles... %d%%"
+ (floor (* received 100.0) number)))
+ (nntp-accept-response))))
+ (and (numberp nntp-large-newsgroup)
+ (> number nntp-large-newsgroup)
+ (nnheader-message 6 "NNTP: Receiving articles...done"))
+
+ ;; Now we have all the responses. We go through the results,
+ ;; wash it and copy it over to the server buffer.
+ (set-buffer nntp-server-buffer)
+ (erase-buffer)
+ (setq last-point (point-min))
+ (mapcar
+ (lambda (entry)
+ (narrow-to-region
+ (setq point (goto-char (point-max)))
+ (progn
+ (nnheader-insert-buffer-substring buf last-point (cdr entry))
+ (point-max)))
+ (setq last-point (cdr entry))
+ (nntp-decode-text)
+ (widen)
+ (cons (car entry) point))
+ map)))))
+
+(defun nntp-try-list-active (group)
+ (nntp-list-active-group group)
+ (with-current-buffer nntp-server-buffer
+ (goto-char (point-min))
+ (cond ((or (eobp)
+ (looking-at "5[0-9]+"))
+ (setq nntp-server-list-active-group nil))
+ (t
+ (setq nntp-server-list-active-group t)))))
+
+(deffoo nntp-list-active-group (group &optional server)
+ "Return the active info on GROUP (which can be a regexp)."
+ (nntp-with-open-group
+ nil server
+ (nntp-send-command "^\\.*\r?\n" "LIST ACTIVE" group)))
+
+(deffoo nntp-request-group-articles (group &optional server)
+ "Return the list of existing articles in GROUP."
+ (nntp-with-open-group
+ nil server
+ (nntp-send-command "^\\.*\r?\n" "LISTGROUP" group)))
+
+(deffoo nntp-request-article (article &optional group server buffer command)
+ (nntp-with-open-group
+ group server
+ (when (nntp-send-command-and-decode
+ "\r?\n\\.\r?\n" "ARTICLE"
+ (if (numberp article) (int-to-string article) article))
+ (when (and buffer
+ (not (equal buffer nntp-server-buffer)))
+ (with-current-buffer nntp-server-buffer
+ (copy-to-buffer buffer (point-min) (point-max))))
+ (nntp-find-group-and-number group))))
+
+(deffoo nntp-request-head (article &optional group server)
+ (nntp-with-open-group
+ group server
+ (when (nntp-send-command
+ "\r?\n\\.\r?\n" "HEAD"
+ (if (numberp article) (int-to-string article) article))
+ (prog1
+ (nntp-find-group-and-number group)
+ (nntp-decode-text)))))
+
+(deffoo nntp-request-body (article &optional group server)
+ (nntp-with-open-group
+ group server
+ (nntp-send-command-and-decode
+ "\r?\n\\.\r?\n" "BODY"
+ (if (numberp article) (int-to-string article) article))))
+
+(deffoo nntp-request-group (group &optional server dont-check info)
+ (nntp-with-open-group
+ nil server
+ (when (nntp-send-command "^[245].*\n" "GROUP" group)
+ (let ((entry (nntp-find-connection-entry nntp-server-buffer)))
+ (setcar (cddr entry) group)))))
+
+(deffoo nntp-close-group (group &optional server)
+ t)
+
+(deffoo nntp-server-opened (&optional server)
+ "Say whether a connection to SERVER has been opened."
+ (and (nnoo-current-server-p 'nntp server)
+ nntp-server-buffer
+ (gnus-buffer-live-p nntp-server-buffer)
+ (nntp-find-connection nntp-server-buffer)))
+
+(deffoo nntp-open-server (server &optional defs connectionless)
+ (nnheader-init-server-buffer)
+ (if (nntp-server-opened server)
+ t
+ (when (or (stringp (car defs))
+ (numberp (car defs)))
+ (setq defs (cons (list 'nntp-port-number (car defs)) (cdr defs))))
+ (unless (assq 'nntp-address defs)
+ (setq defs (append defs (list (list 'nntp-address server)))))
+ (nnoo-change-server 'nntp server defs)
+ (if connectionless
+ t
+ (or (nntp-find-connection nntp-server-buffer)
+ (nntp-open-connection nntp-server-buffer)))))
+
+(deffoo nntp-close-server (&optional server)
+ (nntp-possibly-change-group nil server t)
+ (let ((process (nntp-find-connection nntp-server-buffer)))
+ (while process
+ (when (memq (process-status process) '(open run))
+ (ignore-errors
+ (nntp-send-string process "QUIT")
+ (unless (eq nntp-open-connection-function 'nntp-open-network-stream)
+ ;; Ok, this is evil, but when using telnet and stuff
+ ;; as the connection method, it's important that the
+ ;; QUIT command actually is sent out before we kill
+ ;; the process.
+ (sleep-for 1))))
+ (nntp-kill-buffer (process-buffer process))
+ (setq process (car (pop nntp-connection-alist))))
+ (nnoo-close-server 'nntp)))
+
+(deffoo nntp-request-close ()
+ (let (process)
+ (while (setq process (pop nntp-connection-list))
+ (when (memq (process-status process) '(open run))
+ (ignore-errors
+ (nntp-send-string process "QUIT")
+ (unless (eq nntp-open-connection-function 'nntp-open-network-stream)
+ ;; Ok, this is evil, but when using telnet and stuff
+ ;; as the connection method, it's important that the
+ ;; QUIT command actually is sent out before we kill
+ ;; the process.
+ (sleep-for 1))))
+ (nntp-kill-buffer (process-buffer process)))))
+
+(deffoo nntp-request-list (&optional server)
+ (nntp-with-open-group
+ nil server
+ (nntp-send-command-and-decode "\r?\n\\.\r?\n" "LIST")))
+
+(deffoo nntp-request-list-newsgroups (&optional server)
+ (nntp-with-open-group
+ nil server
+ (nntp-send-command "\r?\n\\.\r?\n" "LIST NEWSGROUPS")))
+
+(deffoo nntp-request-newgroups (date &optional server)
+ (nntp-with-open-group
+ nil server
+ (with-current-buffer nntp-server-buffer
+ (let* ((time (date-to-time date))
+ (ls (- (cadr time) (nth 8 (decode-time time)))))
+ (cond ((< ls 0)
+ (setcar time (1- (car time)))
+ (setcar (cdr time) (+ ls 65536)))
+ ((>= ls 65536)
+ (setcar time (1+ (car time)))
+ (setcar (cdr time) (- ls 65536)))
+ (t
+ (setcar (cdr time) ls)))
+ (prog1
+ (nntp-send-command
+ "^\\.\r?\n" "NEWGROUPS"
+ (format-time-string "%y%m%d %H%M%S" time)
+ "GMT")
+ (nntp-decode-text))))))
+
+(deffoo nntp-request-post (&optional server)
+ (nntp-with-open-group
+ nil server
+ (when (nntp-send-command "^[23].*\r?\n" "POST")
+ (let ((response (with-current-buffer nntp-server-buffer
+ nntp-process-response))
+ server-id)
+ (when (and response
+ (string-match "^[23].*\\(<[^\t\n @<>]+@[^\t\n @<>]+>\\)"
+ response))
+ (setq server-id (match-string 1 response))
+ (narrow-to-region (goto-char (point-min))
+ (if (search-forward "\n\n" nil t)
+ (1- (point))
+ (point-max)))
+ (unless (mail-fetch-field "Message-ID")
+ (goto-char (point-min))
+ (insert "Message-ID: " server-id "\n"))
+ (widen))
+ (run-hooks 'nntp-prepare-post-hook)
+ (nntp-send-buffer "^[23].*\n")))))
+
+(deffoo nntp-request-type (group article)
+ 'news)
+
+(deffoo nntp-asynchronous-p ()
+ t)
+
+
+;;; Hooky functions.
+
+(defun nntp-send-mode-reader ()
+ "Send the MODE READER command to the nntp server.
+This function is supposed to be called from `nntp-server-opened-hook'.
+It will make innd servers spawn an nnrpd process to allow actual article
+reading."
+ (nntp-send-command "^.*\n" "MODE READER"))
+
+(declare-function netrc-parse "netrc" (&optional file))
+(declare-function netrc-machine "netrc"
+ (list machine &optional port defaultport))
+(declare-function netrc-get "netrc" (alist type))
+
+(defun nntp-send-authinfo (&optional send-if-force)
+ "Send the AUTHINFO to the nntp server.
+It will look in the \"~/.authinfo\" file for matching entries. If
+nothing suitable is found there, it will prompt for a user name
+and a password.
+
+If SEND-IF-FORCE, only send authinfo to the server if the
+.authinfo file has the FORCE token."
+ (require 'netrc)
+ (let* ((list (netrc-parse nntp-authinfo-file))
+ (alist (netrc-machine list nntp-address "nntp"))
+ (auth-info
+ (nth 0 (auth-source-search
+ :max 1
+ :host (list nntp-address (nnoo-current-server 'nntp))
+ :port `("119" "nntp" ,(format "%s" nntp-port-number)
+ "563" "nntps" "snews"))))
+ (auth-user (plist-get auth-info :user))
+ (auth-force (plist-get auth-info :force))
+ (auth-passwd (plist-get auth-info :secret))
+ (auth-passwd (if (functionp auth-passwd)
+ (funcall auth-passwd)
+ auth-passwd))
+ (force (or (netrc-get alist "force")
+ nntp-authinfo-force
+ auth-force))
+ (user (or
+ ;; this is preferred to netrc-*
+ auth-user
+ (netrc-get alist "login")
+ nntp-authinfo-user))
+ (passwd (or
+ ;; this is preferred to netrc-*
+ auth-passwd
+ (netrc-get alist "password"))))
+ (when (or (not send-if-force)
+ force)
+ (unless user
+ (setq user (read-string (format "NNTP (%s) user name: " nntp-address))
+ nntp-authinfo-user user))
+ (unless (member user '(nil ""))
+ (nntp-send-command "^3.*\r?\n" "AUTHINFO USER" user)
+ (let ((result
+ (nntp-send-command
+ "^2.*\r?\n" "AUTHINFO PASS"
+ (or passwd
+ nntp-authinfo-password
+ (setq nntp-authinfo-password
+ (read-passwd (format "NNTP (%s@%s) password: "
+ user nntp-address)))))))
+ (if (not result)
+ (signal 'nntp-authinfo-rejected "Password rejected")
+ result))))))
+
+;;; Internal functions.
+
+(defun nntp-handle-authinfo (process)
+ "Take care of an authinfo response from the server."
+ (let ((last nntp-last-command))
+ (funcall nntp-authinfo-function)
+ ;; We have to re-send the function that was interrupted by
+ ;; the authinfo request.
+ (nntp-erase-buffer nntp-server-buffer)
+ (nntp-send-string process last)))
+
+(defun nntp-make-process-buffer (buffer)
+ "Create a new, fresh buffer usable for nntp process connections."
+ (with-current-buffer
+ (generate-new-buffer
+ (format " *server %s %s %s*"
+ nntp-address nntp-port-number
+ (gnus-buffer-exists-p buffer)))
+ (mm-disable-multibyte)
+ (set (make-local-variable 'after-change-functions) nil)
+ (set (make-local-variable 'nntp-process-wait-for) nil)
+ (set (make-local-variable 'nntp-process-callback) nil)
+ (set (make-local-variable 'nntp-process-to-buffer) nil)
+ (set (make-local-variable 'nntp-process-start-point) nil)
+ (set (make-local-variable 'nntp-process-decode) nil)
+ (set (make-local-variable 'nntp-retrieval-in-progress) nil)
+ (current-buffer)))
+
+(defun nntp-open-connection (buffer)
+ "Open a connection to PORT on ADDRESS delivering output to BUFFER."
+ (run-hooks 'nntp-prepare-server-hook)
+ (let* ((pbuffer (nntp-make-process-buffer buffer))
+ (timer
+ (and nntp-connection-timeout
+ (run-at-time
+ nntp-connection-timeout nil
+ `(lambda ()
+ (nntp-kill-buffer ,pbuffer)))))
+ (process
+ (condition-case err
+ (let ((coding-system-for-read 'binary)
+ (coding-system-for-write 'binary)
+ (map '((nntp-open-network-stream network)
+ (network-only plain) ; compat
+ (nntp-open-plain-stream plain)
+ (nntp-open-ssl-stream tls)
+ (nntp-open-tls-stream tls))))
+ (if (assoc nntp-open-connection-function map)
+ (open-protocol-stream
+ "nntpd" pbuffer nntp-address nntp-port-number
+ :type (cadr (assoc nntp-open-connection-function map))
+ :end-of-command "^\\([2345]\\|[.]\\).*\n"
+ :capability-command "HELP\r\n"
+ :success "^3"
+ :starttls-function
+ (lambda (capabilities)
+ (if (not (string-match "STARTTLS" capabilities))
+ nil
+ "STARTTLS\r\n")))
+ (funcall nntp-open-connection-function pbuffer)))
+ (error
+ (nnheader-report 'nntp ">>> %s" err))
+ (quit
+ (message "Quit opening connection to %s" nntp-address)
+ (nntp-kill-buffer pbuffer)
+ (signal 'quit nil)
+ nil))))
+ (when timer
+ (nnheader-cancel-timer timer))
+ (when (and process
+ (not (memq (process-status process) '(open run))))
+ (with-current-buffer pbuffer
+ (goto-char (point-min))
+ (nnheader-report 'nntp "Error when connecting: %s"
+ (buffer-substring (point) (line-end-position))))
+ (setq process nil))
+ (unless process
+ (nntp-kill-buffer pbuffer))
+ (when (and (buffer-name pbuffer)
+ process)
+ (when (and (fboundp 'set-network-process-option) ;; Unavailable in XEmacs.
+ (fboundp 'process-type) ;; Emacs 22 doesn't provide it.
+ (eq (process-type process) 'network))
+ ;; Use TCP-keepalive so that connections that pass through a NAT router
+ ;; don't hang when left idle.
+ (set-network-process-option process :keepalive t))
+ (gnus-set-process-query-on-exit-flag process nil)
+ (if (and (nntp-wait-for process "^2.*\n" buffer nil t)
+ (memq (process-status process) '(open run)))
+ (prog1
+ (caar (push (list process buffer nil) nntp-connection-alist))
+ (push process nntp-connection-list)
+ (with-current-buffer pbuffer
+ (nntp-read-server-type)
+ (erase-buffer)
+ (set-buffer nntp-server-buffer)
+ (let ((nnheader-callback-function nil))
+ (run-hooks 'nntp-server-opened-hook)
+ (nntp-send-authinfo t))))
+ (nntp-kill-buffer (process-buffer process))
+ nil))))
+
+(defun nntp-read-server-type ()
+ "Find out what the name of the server we have connected to is."
+ ;; Wait for the status string to arrive.
+ (setq nntp-server-type (buffer-string))
+ (let ((case-fold-search t))
+ ;; Run server-specific commands.
+ (dolist (entry nntp-server-action-alist)
+ (when (string-match (car entry) nntp-server-type)
+ (if (and (listp (cadr entry))
+ (not (eq 'lambda (caadr entry))))
+ (eval (cadr entry))
+ (funcall (cadr entry)))))))
+
+(defun nntp-async-wait (process wait-for buffer decode callback)
+ (with-current-buffer (process-buffer process)
+ (unless nntp-inside-change-function
+ (erase-buffer))
+ (setq nntp-process-wait-for wait-for
+ nntp-process-to-buffer buffer
+ nntp-process-decode decode
+ nntp-process-callback callback
+ nntp-process-start-point (point-max))
+ (setq after-change-functions '(nntp-after-change-function))))
+
+(defun nntp-async-stop (proc)
+ (setq nntp-async-process-list (delq proc nntp-async-process-list))
+ (when (and nntp-async-timer (not nntp-async-process-list))
+ (nnheader-cancel-timer nntp-async-timer)
+ (setq nntp-async-timer nil)))
+
+(defun nntp-after-change-function (beg end len)
+ (unwind-protect
+ ;; we only care about insertions at eob
+ (when (and (eq 0 len) (eq (point-max) end))
+ (save-match-data
+ (let ((proc (get-buffer-process (current-buffer))))
+ (when proc
+ (nntp-async-trigger proc)))))
+ ;; any throw from after-change-functions will leave it
+ ;; set to nil. so we reset it here, if necessary.
+ (when quit-flag
+ (setq after-change-functions '(nntp-after-change-function)))))
+
+(defun nntp-async-trigger (process)
+ (with-current-buffer (process-buffer process)
+ (when nntp-process-callback
+ ;; do we have an error message?
+ (goto-char nntp-process-start-point)
+ (if (memq (following-char) '(?4 ?5))
+ ;; wants credentials?
+ (if (looking-at "480")
+ (nntp-handle-authinfo process)
+ ;; report error message.
+ (nntp-snarf-error-message)
+ (nntp-do-callback nil))
+
+ ;; got what we expect?
+ (goto-char (point-max))
+ (when (re-search-backward
+ nntp-process-wait-for nntp-process-start-point t)
+ (let ((response (match-string 0)))
+ (with-current-buffer nntp-server-buffer
+ (setq nntp-process-response response)))
+ (nntp-async-stop process)
+ ;; convert it.
+ (when (gnus-buffer-exists-p nntp-process-to-buffer)
+ (let ((buf (current-buffer))
+ (start nntp-process-start-point)
+ (decode nntp-process-decode))
+ (with-current-buffer nntp-process-to-buffer
+ (goto-char (point-max))
+ (save-restriction
+ (narrow-to-region (point) (point))
+ (nnheader-insert-buffer-substring buf start)
+ (when decode
+ (nntp-decode-text))))))
+ ;; report it.
+ (goto-char (point-max))
+ (nntp-do-callback
+ (buffer-name (get-buffer nntp-process-to-buffer))))))))
+
+(defun nntp-do-callback (arg)
+ (let ((callback nntp-process-callback)
+ (nntp-inside-change-function t))
+ (setq nntp-process-callback nil)
+ (funcall callback arg)))
+
+(defun nntp-snarf-error-message ()
+ "Save the error message in the current buffer."
+ (let ((message (buffer-string)))
+ (while (string-match "[\r\n]+" message)
+ (setq message (replace-match " " t t message)))
+ (nnheader-report 'nntp "%s" message)
+ message))
+
+(defun nntp-accept-process-output (process)
+ "Wait for output from PROCESS and message some dots."
+ (with-current-buffer (or (nntp-find-connection-buffer nntp-server-buffer)
+ nntp-server-buffer)
+ (let ((len (/ (buffer-size) 1024))
+ message-log-max)
+ (unless (< len 10)
+ (setq nntp-have-messaged t)
+ (nnheader-message 7 "nntp read: %dk" len)))
+ (prog1
+ (nnheader-accept-process-output process)
+ ;; accept-process-output may update status of process to indicate
+ ;; that the server has closed the connection. This MUST be
+ ;; handled here as the buffer restored by the save-excursion may
+ ;; be the process's former output buffer (i.e. now killed)
+ (or (and process
+ (memq (process-status process) '(open run)))
+ (nntp-report "Server closed connection")))))
+
+(defun nntp-accept-response ()
+ "Wait for output from the process that outputs to BUFFER."
+ (nntp-accept-process-output (nntp-find-connection nntp-server-buffer)))
+
+(defun nntp-possibly-change-group (group server &optional connectionless)
+ (let ((nnheader-callback-function nil))
+ (when server
+ (or (nntp-server-opened server)
+ (nntp-open-server server nil connectionless)))
+
+ (unless connectionless
+ (or (nntp-find-connection nntp-server-buffer)
+ (nntp-open-connection nntp-server-buffer))))
+
+ (when group
+ (let ((entry (nntp-find-connection-entry nntp-server-buffer)))
+ (cond ((not entry)
+ (nntp-report "Server closed connection"))
+ ((not (equal group (caddr entry)))
+ (with-current-buffer (process-buffer (car entry))
+ (erase-buffer)
+ (nntp-send-command "^[245].*\n" "GROUP" group)
+ (setcar (cddr entry) group)
+ (erase-buffer)
+ (nntp-erase-buffer nntp-server-buffer)))))))
+
+(defun nntp-decode-text (&optional cr-only)
+ "Decode the text in the current buffer."
+ (goto-char (point-min))
+ (while (search-forward "\r" nil t)
+ (delete-char -1))
+ (unless cr-only
+ ;; Remove trailing ".\n" end-of-transfer marker.
+ (goto-char (point-max))
+ (forward-line -1)
+ (when (looking-at ".\n")
+ (delete-char 2))
+ ;; Delete status line.
+ (goto-char (point-min))
+ (while (looking-at "[1-5][0-9][0-9] .*\n")
+ ;; For some unknown reason, there is more than one status line.
+ (delete-region (point) (progn (forward-line 1) (point))))
+ ;; Remove "." -> ".." encoding.
+ (while (search-forward "\n.." nil t)
+ (delete-char -1))))
+
+(defun nntp-encode-text ()
+ "Encode the text in the current buffer."
+ (save-excursion
+ ;; Replace "." at beginning of line with "..".
+ (goto-char (point-min))
+ (while (re-search-forward "^\\." nil t)
+ (insert "."))
+ (goto-char (point-max))
+ ;; Insert newline at the end of the buffer.
+ (unless (bolp)
+ (insert "\n"))
+ ;; Insert `.' at end of buffer (end of text mark).
+ (goto-char (point-max))
+ (insert ".\n")
+ (goto-char (point-min))
+ (while (not (eobp))
+ (end-of-line)
+ (delete-char 1)
+ (insert nntp-end-of-line))))
+
+(defun nntp-retrieve-headers-with-xover (articles &optional fetch-old)
+ (set-buffer nntp-server-buffer)
+ (erase-buffer)
+ (cond
+
+ ;; This server does not talk NOV.
+ ((not nntp-server-xover)
+ nil)
+
+ ;; We don't care about gaps.
+ ((or (not nntp-nov-gap)
+ fetch-old)
+ (nntp-send-xover-command
+ (if fetch-old
+ (if (numberp fetch-old)
+ (max 1 (- (car articles) fetch-old))
+ 1)
+ (car articles))
+ (car (last articles)) 'wait)
+
+ (goto-char (point-min))
+ (when (looking-at "[1-5][0-9][0-9] .*\n")
+ (delete-region (point) (progn (forward-line 1) (point))))
+ (while (search-forward "\r" nil t)
+ (replace-match "" t t))
+ (goto-char (point-max))
+ (forward-line -1)
+ (when (looking-at "\\.")
+ (delete-region (point) (progn (forward-line 1) (point)))))
+
+ ;; We do it the hard way. For each gap, an XOVER command is sent
+ ;; to the server. We do not wait for a reply from the server, we
+ ;; just send them off as fast as we can. That means that we have
+ ;; to count the number of responses we get back to find out when we
+ ;; have gotten all we asked for.
+ ((numberp nntp-nov-gap)
+ (let ((count 0)
+ (received 0)
+ last-point
+ in-process-buffer-p
+ (buf nntp-server-buffer)
+ (process-buffer (nntp-find-connection-buffer nntp-server-buffer))
+ first last status)
+ ;; We have to check `nntp-server-xover'. If it gets set to nil,
+ ;; that means that the server does not understand XOVER, but we
+ ;; won't know that until we try.
+ (while (and nntp-server-xover articles)
+ (setq first (car articles))
+ ;; Search forward until we find a gap, or until we run out of
+ ;; articles.
+ (while (and (cdr articles)
+ (< (- (nth 1 articles) (car articles)) nntp-nov-gap))
+ (setq articles (cdr articles)))
+
+ (setq in-process-buffer-p (stringp nntp-server-xover))
+ (nntp-send-xover-command first (setq last (car articles)))
+ (setq articles (cdr articles))
+
+ (when (and nntp-server-xover in-process-buffer-p)
+ ;; Don't count tried request.
+ (setq count (1+ count))
+
+ ;; Every 400 requests we have to read the stream in
+ ;; order to avoid deadlocks.
+ (when (or (null articles) ;All requests have been sent.
+ (= 1 (% count nntp-maximum-request)))
+
+ (nntp-accept-response)
+ ;; On some Emacs versions the preceding function has a
+ ;; tendency to change the buffer. Perhaps. It's quite
+ ;; difficult to reproduce, because it only seems to happen
+ ;; once in a blue moon.
+ (set-buffer process-buffer)
+ (while (progn
+ (goto-char (or last-point (point-min)))
+ ;; Count replies.
+ (while (re-search-forward "^\\([0-9][0-9][0-9]\\) .*\n"
+ nil t)
+ (incf received)
+ (setq status (match-string 1))
+ (if (string-match "^[45]" status)
+ (setq status 'error)
+ (setq status 'ok)))
+ (setq last-point (point))
+ (or (< received count)
+ (if (eq status 'error)
+ nil
+ ;; I haven't started reading the final response
+ (progn
+ (goto-char (point-max))
+ (forward-line -1)
+ (not (looking-at "^\\.\r?\n"))))))
+ ;; I haven't read the end of the final response
+ (nntp-accept-response)
+ (set-buffer process-buffer))))
+
+ ;; Some nntp servers seem to have an extension to the XOVER
+ ;; extension. On these servers, requesting an article range
+ ;; preceding the active range does not return an error as
+ ;; specified in the RFC. What we instead get is the NOV entry
+ ;; for the first available article. Obviously, a client can
+ ;; use that entry to avoid making unnecessary requests. The
+ ;; only problem is for a client that assumes that the response
+ ;; will always be within the requested range. For such a
+ ;; client, we can get N copies of the same entry (one for each
+ ;; XOVER command sent to the server).
+
+ (when (<= count 1)
+ (goto-char (point-min))
+ (when (re-search-forward "^[0-9][0-9][0-9] .*\n\\([0-9]+\\)" nil t)
+ (let ((low-limit (string-to-number
+ (buffer-substring (match-beginning 1)
+ (match-end 1)))))
+ (while (and articles (<= (car articles) low-limit))
+ (setq articles (cdr articles))))))
+ (set-buffer buf))
+
+ (when nntp-server-xover
+ (when in-process-buffer-p
+ (set-buffer buf)
+ (goto-char (point-max))
+ (nnheader-insert-buffer-substring process-buffer)
+ (set-buffer process-buffer)
+ (erase-buffer)
+ (set-buffer buf))
+
+ ;; We remove any "." lines and status lines.
+ (goto-char (point-min))
+ (while (search-forward "\r" nil t)
+ (delete-char -1))
+ (goto-char (point-min))
+ (delete-matching-lines "^\\.$\\|^[1-5][0-9][0-9] ")
+ t))))
+
+ nntp-server-xover)
+
+(defun nntp-send-xover-command (beg end &optional wait-for-reply)
+ "Send the XOVER command to the server."
+ (let ((range (format "%d-%d" beg end))
+ (nntp-inhibit-erase t))
+ (if (stringp nntp-server-xover)
+ ;; If `nntp-server-xover' is a string, then we just send this
+ ;; command.
+ (if wait-for-reply
+ (nntp-send-command-nodelete
+ "\r?\n\\.\r?\n" nntp-server-xover range)
+ ;; We do not wait for the reply.
+ (nntp-send-command-nodelete nil nntp-server-xover range))
+ (let ((commands nntp-xover-commands))
+ ;; `nntp-xover-commands' is a list of possible XOVER commands.
+ ;; We try them all until we get at positive response.
+ (while (and commands (eq nntp-server-xover 'try))
+ (nntp-send-command-nodelete "\r?\n\\.\r?\n" (car commands) range)
+ (with-current-buffer nntp-server-buffer
+ (goto-char (point-min))
+ (and (looking-at "[23]") ; No error message.
+ ;; We also have to look at the lines. Some buggy
+ ;; servers give back simple lines with just the
+ ;; article number. How... helpful.
+ (progn
+ (forward-line 1)
+ ;; More text after number, or a dot.
+ (looking-at "[0-9]+\t...\\|\\.\r?\n"))
+ (setq nntp-server-xover (car commands))))
+ (setq commands (cdr commands)))
+ ;; If none of the commands worked, we disable XOVER.
+ (when (eq nntp-server-xover 'try)
+ (nntp-erase-buffer nntp-server-buffer)
+ (setq nntp-server-xover nil))
+ nntp-server-xover))))
+
+(defun nntp-find-group-and-number (&optional group)
+ (save-excursion
+ (save-restriction
+ ;; FIXME: This is REALLY FISHY: set-buffer after save-restriction?!?
+ (set-buffer nntp-server-buffer)
+ (narrow-to-region (goto-char (point-min))
+ (or (search-forward "\n\n" nil t) (point-max)))
+ (goto-char (point-min))
+ ;; We first find the number by looking at the status line.
+ (let ((number (and (looking-at "2[0-9][0-9] +\\([0-9]+\\) ")
+ (string-to-number
+ (buffer-substring (match-beginning 1)
+ (match-end 1)))))
+ newsgroups xref)
+ (and number (zerop number) (setq number nil))
+ (if number
+ ;; Then we find the group name.
+ (setq group
+ (cond
+ ;; If there is only one group in the Newsgroups
+ ;; header, then it seems quite likely that this
+ ;; article comes from that group, I'd say.
+ ((and (setq newsgroups
+ (mail-fetch-field "newsgroups"))
+ (not (string-match "," newsgroups)))
+ newsgroups)
+ ;; If there is more than one group in the
+ ;; Newsgroups header, then the Xref header should
+ ;; be filled out. We hazard a guess that the group
+ ;; that has this article number in the Xref header
+ ;; is the one we are looking for. This might very
+ ;; well be wrong if this article happens to have
+ ;; the same number in several groups, but that's
+ ;; life.
+ ((and (setq xref (mail-fetch-field "xref"))
+ number
+ (string-match
+ (format "\\([^ :]+\\):%d" number) xref))
+ (match-string 1 xref))
+ (t "")))
+ (cond
+ ((and (not nntp-xref-number-is-evil)
+ (setq xref (mail-fetch-field "xref"))
+ (string-match
+ (if group
+ (concat "\\(" (regexp-quote group) "\\):\\([0-9]+\\)")
+ "\\([^ :]+\\):\\([0-9]+\\)")
+ xref))
+ (setq group (match-string 1 xref)
+ number (string-to-number (match-string 2 xref))))
+ ((and (setq newsgroups
+ (mail-fetch-field "newsgroups"))
+ (not (string-match "," newsgroups)))
+ (setq group newsgroups))
+ (group)
+ (t (setq group ""))))
+ (when (string-match "\r" group)
+ (setq group (substring group 0 (match-beginning 0))))
+ (cons group number)))))
+
+(defun nntp-wait-for-string (regexp)
+ "Wait until string arrives in the buffer."
+ (let ((buf (current-buffer))
+ proc)
+ (goto-char (point-min))
+ (while (and (setq proc (get-buffer-process buf))
+ (memq (process-status proc) '(open run))
+ (not (re-search-forward regexp nil t)))
+ (accept-process-output proc 0.1)
+ (set-buffer buf)
+ (goto-char (point-min)))))
+
+
+;; ==========================================================================
+;; Obsolete nntp-open-* connection methods -- drv
+;; ==========================================================================
+
+(defvoo nntp-open-telnet-envuser nil
+ "*If non-nil, telnet session (client and server both) will support the ENVIRON option and not prompt for login name.")
+
+(defvoo nntp-telnet-shell-prompt "bash\\|[$>] *\r?$"
+ "*Regular expression to match the shell prompt on the remote machine.")
+
+(defvoo nntp-rlogin-program "rsh"
+ "*Program used to log in on remote machines.
+The default is \"rsh\", but \"ssh\" is a popular alternative.")
+
+(defvoo nntp-rlogin-parameters '("telnet" "-8" "${NNTPSERVER:=news}" "nntp")
+ "*Parameters to `nntp-open-rlogin'.
+That function may be used as `nntp-open-connection-function'. In that
+case, this list will be used as the parameter list given to rsh.")
+
+(defvoo nntp-rlogin-user-name nil
+ "*User name on remote system when using the rlogin connect method.")
+
+(defvoo nntp-telnet-parameters
+ '("exec" "telnet" "-8" "${NNTPSERVER:=news}" "nntp")
+ "*Parameters to `nntp-open-telnet'.
+That function may be used as `nntp-open-connection-function'. In that
+case, this list will be executed as a command after logging in
+via telnet.")
+
+(defvoo nntp-telnet-user-name nil
+ "User name to log in via telnet with.")
+
+(defvoo nntp-telnet-passwd nil
+ "Password to use to log in via telnet with.")
+
+(defun nntp-service-to-port (svc)
+ (cond
+ ((integerp svc) (number-to-string svc))
+ ((string-match "\\`[0-9]+\\'" svc) svc)
+ (t
+ (with-temp-buffer
+ (ignore-errors (insert-file-contents "/etc/services"))
+ (goto-char (point-min))
+ (if (re-search-forward (concat "^" (regexp-quote svc)
+ "[ \t]+\\([0-9]+\\)/tcp"))
+ (match-string 1)
+ svc)))))
+
+(defun nntp-open-telnet (buffer)
+ (with-current-buffer buffer
+ (erase-buffer)
+ (let ((proc (apply
+ 'start-process
+ "nntpd" buffer nntp-telnet-command nntp-telnet-switches))
+ (case-fold-search t))
+ (when (memq (process-status proc) '(open run))
+ (nntp-wait-for-string "^r?telnet")
+ (process-send-string proc "set escape \^X\n")
+ (cond
+ ((and nntp-open-telnet-envuser nntp-telnet-user-name)
+ (process-send-string proc (concat "open " "-l" nntp-telnet-user-name
+ nntp-address "\n")))
+ (t
+ (process-send-string proc (concat "open " nntp-address "\n"))))
+ (cond
+ ((not nntp-open-telnet-envuser)
+ (nntp-wait-for-string "^\r*.?login:")
+ (process-send-string
+ proc (concat
+ (or nntp-telnet-user-name
+ (setq nntp-telnet-user-name (read-string "login: ")))
+ "\n"))))
+ (nntp-wait-for-string "^\r*.?password:")
+ (process-send-string
+ proc (concat
+ (or nntp-telnet-passwd
+ (setq nntp-telnet-passwd
+ (read-passwd "Password: ")))
+ "\n"))
+ (nntp-wait-for-string nntp-telnet-shell-prompt)
+ (process-send-string
+ proc (concat (mapconcat 'identity nntp-telnet-parameters " ") "\n"))
+ (nntp-wait-for-string "^\r*20[01]")
+ (beginning-of-line)
+ (delete-region (point-min) (point))
+ (process-send-string proc "\^]")
+ (nntp-wait-for-string "^r?telnet")
+ (process-send-string proc "mode character\n")
+ (accept-process-output proc 1)
+ (sit-for 1)
+ (goto-char (point-min))
+ (forward-line 1)
+ (delete-region (point) (point-max)))
+ proc)))
+
+(defun nntp-open-rlogin (buffer)
+ "Open a connection to SERVER using rsh."
+ (let ((proc (if nntp-rlogin-user-name
+ (apply 'start-process
+ "nntpd" buffer nntp-rlogin-program
+ nntp-address "-l" nntp-rlogin-user-name
+ nntp-rlogin-parameters)
+ (apply 'start-process
+ "nntpd" buffer nntp-rlogin-program nntp-address
+ nntp-rlogin-parameters))))
+ (with-current-buffer buffer
+ (nntp-wait-for-string "^\r*20[01]")
+ (beginning-of-line)
+ (delete-region (point-min) (point))
+ proc)))
+
+
+;; ==========================================================================
+;; Replacements for the nntp-open-* functions -- drv
+;; ==========================================================================
+
+(defun nntp-open-telnet-stream (buffer)
+ "Open a nntp connection by telnet'ing the news server.
+`nntp-open-netcat-stream' is recommended in place of this function
+because it is more reliable.
+
+Please refer to the following variables to customize the connection:
+- `nntp-pre-command',
+- `nntp-telnet-command',
+- `nntp-telnet-switches',
+- `nntp-address',
+- `nntp-port-number',
+- `nntp-end-of-line'."
+ (let ((command `(,nntp-telnet-command
+ ,@nntp-telnet-switches
+ ,nntp-address
+ ,(nntp-service-to-port nntp-port-number)))
+ proc)
+ (and nntp-pre-command
+ (push nntp-pre-command command))
+ (setq proc (apply 'start-process "nntpd" buffer command))
+ (with-current-buffer buffer
+ (nntp-wait-for-string "^\r*20[01]")
+ (beginning-of-line)
+ (delete-region (point-min) (point))
+ proc)))
+
+(defun nntp-open-via-rlogin-and-telnet (buffer)
+ "Open a connection to an nntp server through an intermediate host.
+First rlogin to the remote host, and then telnet the real news server
+from there.
+`nntp-open-via-rlogin-and-netcat' is recommended in place of this function
+because it is more reliable.
+
+Please refer to the following variables to customize the connection:
+- `nntp-pre-command',
+- `nntp-via-rlogin-command',
+- `nntp-via-rlogin-command-switches',
+- `nntp-via-user-name',
+- `nntp-via-address',
+- `nntp-telnet-command',
+- `nntp-telnet-switches',
+- `nntp-address',
+- `nntp-port-number',
+- `nntp-end-of-line'."
+ (let ((command `(,nntp-via-address
+ ,nntp-telnet-command
+ ,@nntp-telnet-switches))
+ proc)
+ (when nntp-via-user-name
+ (setq command `("-l" ,nntp-via-user-name ,@command)))
+ (when nntp-via-rlogin-command-switches
+ (setq command (append nntp-via-rlogin-command-switches command)))
+ (push nntp-via-rlogin-command command)
+ (and nntp-pre-command
+ (push nntp-pre-command command))
+ (setq proc (apply 'start-process "nntpd" buffer command))
+ (with-current-buffer buffer
+ (nntp-wait-for-string "^r?telnet")
+ (process-send-string proc (concat "open " nntp-address " "
+ (nntp-service-to-port nntp-port-number)
+ "\n"))
+ (nntp-wait-for-string "^\r*20[01]")
+ (beginning-of-line)
+ (delete-region (point-min) (point))
+ (process-send-string proc "\^]")
+ (nntp-wait-for-string "^r?telnet")
+ (process-send-string proc "mode character\n")
+ (accept-process-output proc 1)
+ (sit-for 1)
+ (goto-char (point-min))
+ (forward-line 1)
+ (delete-region (point) (point-max)))
+ proc))
+
+(defun nntp-open-via-rlogin-and-netcat (buffer)
+ "Open a connection to an nntp server through an intermediate host.
+First rlogin to the remote host, and then connect to the real news
+server from there using the netcat command.
+
+Please refer to the following variables to customize the connection:
+- `nntp-pre-command',
+- `nntp-via-rlogin-command',
+- `nntp-via-rlogin-command-switches',
+- `nntp-via-user-name',
+- `nntp-via-address',
+- `nntp-netcat-command',
+- `nntp-netcat-switches',
+- `nntp-address',
+- `nntp-port-number'."
+ (let ((command `(,@(when nntp-pre-command
+ (list nntp-pre-command))
+ ,nntp-via-rlogin-command
+ ,@nntp-via-rlogin-command-switches
+ ,@(when nntp-via-user-name
+ (list "-l" nntp-via-user-name))
+ ,nntp-via-address
+ ,nntp-netcat-command
+ ,@nntp-netcat-switches
+ ,nntp-address
+ ,(nntp-service-to-port nntp-port-number))))
+ ;; A non-nil connection type results in mightily odd behavior where
+ ;; (process-send-string proc "\^M") ends up sending a "\n" to the
+ ;; ssh process. --Stef
+ ;; Also a nil connection allow ssh-askpass to work under X11.
+ (let ((process-connection-type nil))
+ (apply 'start-process "nntpd" buffer command))))
+
+(defun nntp-open-netcat-stream (buffer)
+ "Open a connection to an nntp server through netcat.
+I.e. use the `nc' command rather than Emacs's builtin networking code.
+
+Please refer to the following variables to customize the connection:
+- `nntp-pre-command',
+- `nntp-netcat-command',
+- `nntp-netcat-switches',
+- `nntp-address',
+- `nntp-port-number'."
+ (let ((command `(,nntp-netcat-command
+ ,@nntp-netcat-switches
+ ,nntp-address
+ ,(nntp-service-to-port nntp-port-number))))
+ (and nntp-pre-command (push nntp-pre-command command))
+ (let ((process-connection-type nil)) ;See `nntp-open-via-rlogin-and-netcat'.
+ (apply 'start-process "nntpd" buffer command))))
+
+
+(defun nntp-open-via-telnet-and-telnet (buffer)
+ "Open a connection to an nntp server through an intermediate host.
+First telnet the remote host, and then telnet the real news server
+from there.
+
+Please refer to the following variables to customize the connection:
+- `nntp-pre-command',
+- `nntp-via-telnet-command',
+- `nntp-via-telnet-switches',
+- `nntp-via-address',
+- `nntp-via-envuser',
+- `nntp-via-user-name',
+- `nntp-via-user-password',
+- `nntp-via-shell-prompt',
+- `nntp-telnet-command',
+- `nntp-telnet-switches',
+- `nntp-address',
+- `nntp-port-number',
+- `nntp-end-of-line'."
+ (with-current-buffer buffer
+ (erase-buffer)
+ (let ((command `(,nntp-via-telnet-command ,@nntp-via-telnet-switches))
+ (case-fold-search t)
+ proc)
+ (and nntp-pre-command (push nntp-pre-command command))
+ (setq proc (apply 'start-process "nntpd" buffer command))
+ (when (memq (process-status proc) '(open run))
+ (nntp-wait-for-string "^r?telnet")
+ (process-send-string proc "set escape \^X\n")
+ (cond
+ ((and nntp-via-envuser nntp-via-user-name)
+ (process-send-string proc (concat "open " "-l" nntp-via-user-name
+ nntp-via-address "\n")))
+ (t
+ (process-send-string proc (concat "open " nntp-via-address
+ "\n"))))
+ (when (not nntp-via-envuser)
+ (nntp-wait-for-string "^\r*.?login:")
+ (process-send-string proc
+ (concat
+ (or nntp-via-user-name
+ (setq nntp-via-user-name
+ (read-string "login: ")))
+ "\n")))
+ (nntp-wait-for-string "^\r*.?password:")
+ (process-send-string proc
+ (concat
+ (or nntp-via-user-password
+ (setq nntp-via-user-password
+ (read-passwd "Password: ")))
+ "\n"))
+ (nntp-wait-for-string nntp-via-shell-prompt)
+ (let ((real-telnet-command `("exec"
+ ,nntp-telnet-command
+ ,@nntp-telnet-switches
+ ,nntp-address
+ ,(nntp-service-to-port nntp-port-number))))
+ (process-send-string proc
+ (concat (mapconcat 'identity
+ real-telnet-command " ")
+ "\n")))
+ (nntp-wait-for-string "^\r*20[01]")
+ (beginning-of-line)
+ (delete-region (point-min) (point))
+ (process-send-string proc "\^]")
+ (nntp-wait-for-string "^r?telnet")
+ (process-send-string proc "mode character\n")
+ (accept-process-output proc 1)
+ (sit-for 1)
+ (goto-char (point-min))
+ (forward-line 1)
+ (delete-region (point) (point-max)))
+ proc)))
+
+(provide 'nntp)
+
+;;; nntp.el ends here
projects / packages / blobdiff