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emacs/lisp/gnus/gnus-int.el
Paul Eggert bc511a64f6 Prefer HTTPS to FTP and HTTP in documentation 
Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November.  Change these FTP URLs to https://ftp.gnu.org
instead.  Make similar changes for URLs to other organizations moving
away from FTP.  Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
2017-09-13 15:54:37 -07:00

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;;; gnus-int.el --- backend interface functions for Gnus
;; Copyright (C) 1996-2017 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(eval-when-compile (require 'cl))
(require 'gnus)
(require 'message)
(require 'gnus-range)
(autoload 'gnus-run-hook-with-args "gnus-util")
(autoload 'gnus-agent-expire "gnus-agent")
(autoload 'gnus-agent-regenerate-group "gnus-agent")
(autoload 'gnus-agent-read-servers-validate-native "gnus-agent")
(autoload 'gnus-agent-possibly-synchronize-flags-server "gnus-agent")
(defcustom gnus-open-server-hook nil
"Hook called just before opening connection to the news server."
:group 'gnus-start
:type 'hook)
(defcustom gnus-after-set-mark-hook nil
"Hook called just after marks are set in a group."
:version "24.1"
:group 'gnus-start
:type 'hook)
(defcustom gnus-before-update-mark-hook nil
"Hook called just before marks are updated in a group."
:version "24.1"
:group 'gnus-start
:type 'hook)
(defcustom gnus-server-unopen-status nil
"The default status if the server is not able to open.
If the server is covered by Gnus agent, the possible values are
`denied', set the server denied; `offline', set the server offline;
nil, ask user. If the server is not covered by Gnus agent, set the
server denied."
:version "22.1"
:group 'gnus-start
:type '(choice (const :tag "Ask" nil)
(const :tag "Deny server" denied)
(const :tag "Unplug Agent" offline)))
(defcustom gnus-nntp-server nil
"The name of the host running the NNTP server."
:group 'gnus-server
:type '(choice (const :tag "disable" nil)
string))
(make-obsolete-variable 'gnus-nntp-server 'gnus-select-method "24.1")
(defvar gnus-internal-registry-spool-current-method nil
"The current method, for the registry.")
(defun gnus-server-opened (gnus-command-method)
"Check whether a connection to GNUS-COMMAND-METHOD has been opened."
(unless (eq (gnus-server-status gnus-command-method)
'denied)
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (inline (gnus-get-function gnus-command-method 'server-opened))
(nth 1 gnus-command-method))))
(defun gnus-status-message (gnus-command-method)
"Return the status message from GNUS-COMMAND-METHOD.
If GNUS-COMMAND-METHOD is a string, it is interpreted as a group
name. The method this group uses will be queried."
(let ((gnus-command-method
(if (stringp gnus-command-method)
(gnus-find-method-for-group gnus-command-method)
gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'status-message)
(nth 1 gnus-command-method))))
;;;
;;; Server Communication
;;;
(defun gnus-start-news-server (&optional confirm)
"Open a method for getting news.
If CONFIRM is non-nil, the user will be asked for an NNTP server."
(let (how)
(if gnus-current-select-method
;; Stream is already opened.
nil
;; Open NNTP server.
(when confirm
;; Read server name with completion.
(setq gnus-nntp-server
(gnus-completing-read "NNTP server"
(cons gnus-nntp-server
(if (boundp 'gnus-secondary-servers)
gnus-secondary-servers))
nil gnus-nntp-server)))
(when (and gnus-nntp-server
(stringp gnus-nntp-server)
(not (string= gnus-nntp-server "")))
(setq gnus-select-method
(cond ((or (string= gnus-nntp-server "")
(string= gnus-nntp-server "::"))
(list 'nnspool (system-name)))
((string-match "^:" gnus-nntp-server)
(list 'nnmh gnus-nntp-server
(list 'nnmh-directory
(file-name-as-directory
(expand-file-name
(substring gnus-nntp-server 1) "~/")))
(list 'nnmh-get-new-mail nil)))
(t
(list 'nntp gnus-nntp-server)))))
(setq how (car gnus-select-method))
(cond
((eq how 'nnspool)
(require 'nnspool)
(gnus-message 5 "Looking up local news spool..."))
((eq how 'nnmh)
(require 'nnmh)
(gnus-message 5 "Looking up mh spool..."))
(t
(require 'nntp)))
(setq gnus-current-select-method gnus-select-method)
(gnus-run-hooks 'gnus-open-server-hook)
;; Partially validate agent covered methods now that the
;; gnus-select-method is known.
(if gnus-agent
;; NOTE: This is here for one purpose only. By validating
;; the current select method, it converts the old 5.10.3,
;; and earlier, format to the current format. That enables
;; the agent code within gnus-open-server to function
;; correctly.
(gnus-agent-read-servers-validate-native gnus-select-method))
(or
;; gnus-open-server-hook might have opened it
(gnus-server-opened gnus-select-method)
(gnus-open-server gnus-select-method)
gnus-batch-mode
(gnus-y-or-n-p
(format-message
"%s (%s) open error: `%s'. Continue? "
(car gnus-select-method) (cadr gnus-select-method)
(gnus-status-message gnus-select-method)))
(gnus-error 1 "Couldn't open server on %s"
(nth 1 gnus-select-method))))))
(defun gnus-check-group (group)
"Try to make sure that the server where GROUP exists is alive."
(let ((method (gnus-find-method-for-group group)))
(or (gnus-server-opened method)
(gnus-open-server method))))
(defun gnus-check-server (&optional method silent)
"Check whether the connection to METHOD is down.
If METHOD is nil, use `gnus-select-method'.
If it is down, start it up (again)."
(let ((method (or method gnus-select-method))
result)
;; Transform virtual server names into select methods.
(when (stringp method)
(setq method (gnus-server-to-method method)))
(if (gnus-server-opened method)
;; The stream is already opened.
t
;; Open the server.
(unless silent
(gnus-message 5 "Opening %s server%s..." (car method)
(if (equal (nth 1 method) "") ""
(format " on %s" (nth 1 method)))))
(gnus-run-hooks 'gnus-open-server-hook)
(prog1
(setq result (gnus-open-server method))
(unless silent
(gnus-message
(if result 5 3)
"Opening %s server%s...%s" (car method)
(if (equal (nth 1 method) "") ""
(format " on %s" (nth 1 method)))
(if result
"done"
(format "failed: %s"
(nnheader-get-report-string (car method))))))))))
(defun gnus-get-function (method function &optional noerror)
"Return a function symbol based on METHOD and FUNCTION."
;; Translate server names into methods.
(unless method
(error "Attempted use of a nil select method"))
(when (stringp method)
(setq method (gnus-server-to-method method)))
;; Check cache of constructed names.
(let* ((method-sym (if gnus-agent
(inline (gnus-agent-get-function method))
(car method)))
(method-fns (get method-sym 'gnus-method-functions))
(func (let ((method-fnlist-elt (assq function method-fns)))
(unless method-fnlist-elt
(setq method-fnlist-elt
(cons function
(intern (format "%s-%s" method-sym function))))
(put method-sym 'gnus-method-functions
(cons method-fnlist-elt method-fns)))
(cdr method-fnlist-elt))))
;; Maybe complain if there is no function.
(unless (fboundp func)
(unless (car method)
(error "Trying to require a method that doesn't exist"))
(require (car method))
(when (not (fboundp func))
(if noerror
(setq func nil)
(error "No such function: %s" func))))
func))
;;;
;;; Interface functions to the backends.
;;;
(defun gnus-method-denied-p (method)
(eq (nth 1 (assoc method gnus-opened-servers))
'denied))
(defvar gnus-backend-trace nil)
(defvar gnus-backend-trace-elapsed nil)
(defun gnus-backend-trace (type form)
(when gnus-backend-trace
(with-current-buffer (get-buffer-create "*gnus trace*")
(buffer-disable-undo)
(goto-char (point-max))
(insert (format-time-string "%H:%M:%S")
(format " %.2fs %s %S\n"
(if (numberp gnus-backend-trace-elapsed)
(- (float-time) gnus-backend-trace-elapsed)
0)
type form))
(setq gnus-backend-trace-elapsed (float-time)))))
(defun gnus-open-server (gnus-command-method)
"Open a connection to GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(gnus-backend-trace :opening gnus-command-method)
(let ((elem (assoc gnus-command-method gnus-opened-servers))
(server (gnus-method-to-server-name gnus-command-method)))
;; If this method was previously denied, we just return nil.
(if (eq (nth 1 elem) 'denied)
(progn
(gnus-message
1 "Server %s previously determined to be down; not retrying" server)
nil)
;; Open the server.
(let* ((open-server-function
(gnus-get-function gnus-command-method 'open-server))
(result
(condition-case err
(funcall open-server-function
(nth 1 gnus-command-method)
(nthcdr 2 gnus-command-method))
(error
(gnus-message 1 "Unable to open server %s due to: %s"
server (error-message-string err))
nil)
(quit
(if debug-on-quit
(debug "Quit")
(gnus-message 1 "Quit trying to open server %s" server))
nil)))
open-offline)
;; If this hasn't been opened before, we add it to the list.
(unless elem
(setq elem (list gnus-command-method nil)
gnus-opened-servers (cons elem gnus-opened-servers)))
;; Set the status of this server.
(setcar
(cdr elem)
(cond (result
(if (eq open-server-function 'nnagent-open-server)
;; The agent's backend has a "special" status
'offline
'ok))
((and gnus-agent
(gnus-agent-method-p gnus-command-method))
(cond
(gnus-server-unopen-status
;; Set the server's status to the unopen
;; status. If that status is offline,
;; recurse to open the agent's backend.
(setq open-offline (eq gnus-server-unopen-status 'offline))
gnus-server-unopen-status)
((not gnus-batch-mode)
(setq open-offline t)
'offline)
(t
;; This agentized server was still denied
'denied)))
(t
;; This unagentized server must be denied
'denied)))
;; NOTE: I MUST set the server's status to offline before this
;; recursive call as this status will drive the
;; gnus-get-function (called above) to return the agent's
;; backend.
(if open-offline
;; Recursively open this offline server to perform the
;; open-server function of the agent's backend.
(let ((gnus-server-unopen-status 'denied))
;; Bind gnus-server-unopen-status to avoid recursively
;; prompting with "go offline?". This is only a concern
;; when the agent's backend fails to open the server.
(gnus-open-server gnus-command-method))
(when (and (eq (cadr elem) 'ok) gnus-agent
(gnus-agent-method-p gnus-command-method))
(save-excursion
(gnus-agent-possibly-synchronize-flags-server
gnus-command-method)))
(gnus-backend-trace :opened gnus-command-method)
result)))))
(defun gnus-close-server (gnus-command-method)
"Close the connection to GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'close-server)
(nth 1 gnus-command-method)))
(defun gnus-request-list (gnus-command-method)
"Request the active file from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-list)
(nth 1 gnus-command-method)))
(defun gnus-finish-retrieve-group-infos (gnus-command-method infos data)
"Read and update infos from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(gnus-backend-trace :finishing gnus-command-method)
(prog1
(funcall (gnus-get-function gnus-command-method
'finish-retrieve-group-infos)
(nth 1 gnus-command-method)
infos data)
(gnus-backend-trace :finished gnus-command-method)))
(defun gnus-retrieve-group-data-early (gnus-command-method infos)
"Start early async retrieval of data from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'retrieve-group-data-early)
(nth 1 gnus-command-method)
infos))
(defun gnus-request-list-newsgroups (gnus-command-method)
"Request the newsgroups file from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-list-newsgroups)
(nth 1 gnus-command-method)))
(defun gnus-request-newgroups (date gnus-command-method)
"Request all new groups since DATE from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(let ((func (gnus-get-function gnus-command-method 'request-newgroups t)))
(when func
(funcall func date (nth 1 gnus-command-method)))))
(defun gnus-request-regenerate (gnus-command-method)
"Request a data generation from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-regenerate)
(nth 1 gnus-command-method)))
(defun gnus-request-compact-group (group)
(let* ((method (gnus-find-method-for-group group))
(gnus-command-method method)
(result
(funcall (gnus-get-function gnus-command-method
'request-compact-group)
(gnus-group-real-name group)
(nth 1 gnus-command-method) t)))
result))
(defun gnus-request-compact (gnus-command-method)
"Request groups compaction from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-compact)
(nth 1 gnus-command-method)))
(defun gnus-request-group (group &optional dont-check gnus-command-method info)
"Request GROUP. If DONT-CHECK, no information is required."
(let ((gnus-command-method
(or gnus-command-method (inline (gnus-find-method-for-group group)))))
(when (stringp gnus-command-method)
(setq gnus-command-method
(inline (gnus-server-to-method gnus-command-method))))
(funcall (inline (gnus-get-function gnus-command-method 'request-group))
(gnus-group-real-name group) (nth 1 gnus-command-method)
dont-check
info)))
(defun gnus-request-group-description (group)
"Request a description of GROUP."
(let ((gnus-command-method (gnus-find-method-for-group group))
(func 'request-group-description))
(when (gnus-check-backend-function func group)
(funcall (gnus-get-function gnus-command-method func)
(gnus-group-real-name group) (nth 1 gnus-command-method)))))
(defun gnus-request-group-scan (group info)
"Request that GROUP get a complete rescan."
(let ((gnus-command-method (gnus-find-method-for-group group))
(func 'request-group-scan))
(when (gnus-check-backend-function func group)
(funcall (gnus-get-function gnus-command-method func)
(gnus-group-real-name group) (nth 1 gnus-command-method) info))))
(defun gnus-close-group (group)
"Request the GROUP be closed."
(let ((gnus-command-method (inline (gnus-find-method-for-group group))))
(funcall (gnus-get-function gnus-command-method 'close-group)
(gnus-group-real-name group) (nth 1 gnus-command-method))))
(defun gnus-retrieve-headers (articles group &optional fetch-old)
"Request headers for ARTICLES in GROUP.
If FETCH-OLD, retrieve all headers (or some subset thereof) in the group."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(cond
((and gnus-use-cache (numberp (car articles)))
(gnus-cache-retrieve-headers articles group fetch-old))
((and gnus-agent (gnus-online gnus-command-method)
(gnus-agent-method-p gnus-command-method))
(gnus-agent-retrieve-headers articles group fetch-old))
(t
(funcall (gnus-get-function gnus-command-method 'retrieve-headers)
articles (gnus-group-real-name group)
(nth 1 gnus-command-method) fetch-old)))))
(defun gnus-retrieve-articles (articles group)
"Request ARTICLES in GROUP."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(funcall (gnus-get-function gnus-command-method 'retrieve-articles)
articles (gnus-group-real-name group)
(nth 1 gnus-command-method))))
(defun gnus-retrieve-groups (groups gnus-command-method)
"Request active information on GROUPS from GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'retrieve-groups)
groups (nth 1 gnus-command-method)))
(defun gnus-request-type (group &optional article)
"Return the type (`post' or `mail') of GROUP (and ARTICLE)."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(if (not (gnus-check-backend-function
'request-type (car gnus-command-method)))
'unknown
(funcall (gnus-get-function gnus-command-method 'request-type)
(gnus-group-real-name group) article))))
(defun gnus-request-update-group-status (group status)
"Change the status of a group.
Valid statuses include `subscribe' and `unsubscribe'."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(if (not (gnus-check-backend-function
'request-update-group-status (car gnus-command-method)))
nil
(funcall
(gnus-get-function gnus-command-method 'request-update-group-status)
(gnus-group-real-name group) status
(nth 1 gnus-command-method)))))
(defun gnus-request-set-mark (group action)
"Set marks on articles in the back end."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(if (not (gnus-check-backend-function
'request-set-mark (car gnus-command-method)))
action
(funcall (gnus-get-function gnus-command-method 'request-set-mark)
(gnus-group-real-name group) action
(nth 1 gnus-command-method))
(gnus-run-hook-with-args gnus-after-set-mark-hook group action))))
(defun gnus-request-update-mark (group article mark)
"Allow the back end to change the mark the user tries to put on an article."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(if (not (gnus-check-backend-function
'request-update-mark (car gnus-command-method)))
mark
(gnus-run-hook-with-args gnus-before-update-mark-hook group article mark)
(funcall (gnus-get-function gnus-command-method 'request-update-mark)
(gnus-group-real-name group) article mark))))
(defun gnus-request-article (article group &optional buffer)
"Request the ARTICLE in GROUP.
ARTICLE can either be an article number or an article Message-ID.
If BUFFER, insert the article in that group."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(funcall (gnus-get-function gnus-command-method 'request-article)
article (gnus-group-real-name group)
(nth 1 gnus-command-method) buffer)))
(defun gnus-request-thread (header group)
"Request the headers in the thread containing the article specified by HEADER."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(funcall (gnus-get-function gnus-command-method 'request-thread)
header
(gnus-group-real-name group))))
(defun gnus-select-group-with-message-id (group message-id)
"Activate and select GROUP with the given MESSAGE-ID selected.
Returns the article number of the message.
If GROUP is not already selected, the message will be the only one in
the group's summary.
"
;; TODO: is there a way to know at this point whether the group will
;; be newly-selected? If so we could clean up the logic at the end
;;
;; save the new group's display parameter, if any, so we
;; can replace it temporarily with zero.
(let ((saved-display
(gnus-group-get-parameter group 'display :allow-list)))
;; Tell gnus we really don't want any articles
(gnus-group-set-parameter group 'display 0)
(unwind-protect
(gnus-summary-read-group-1
group (not :show-all) :no-article (not :kill-buffer)
;; The combination of no-display and this dummy list of
;; articles to select somehow makes it possible to open a
;; group with no articles in it. Black magic.
:no-display '(-1); select-articles
)
;; Restore the new group's display parameter
(gnus-group-set-parameter group 'display saved-display)))
;; The summary buffer was suppressed by :no-display above.
;; Create it now and insert the message
(let ((group-is-new (gnus-summary-setup-buffer group)))
(condition-case err
(let ((article-number
(gnus-summary-insert-subject message-id)))
(unless article-number
(signal 'error "message-id not in group"))
(gnus-summary-select-article nil nil nil article-number)
article-number)
;; Clean up the new summary and propagate the error
(error (when group-is-new (gnus-summary-exit))
(apply 'signal err)))))
(defun gnus-simplify-group-name (group)
"Return the simplest representation of the name of GROUP.
This is the string that Gnus uses to identify the group."
(gnus-group-prefixed-name
(gnus-group-real-name group)
(gnus-group-method group)))
(defun gnus-warp-to-article ()
"Look up the current article in the group where it originated.
This command only makes sense for groups shows articles gathered
from other groups -- for instance, search results and the like."
(interactive)
(let ((gnus-command-method
(gnus-find-method-for-group gnus-newsgroup-name)))
(or
(when (gnus-check-backend-function
'warp-to-article (car gnus-command-method))
(funcall (gnus-get-function gnus-command-method 'warp-to-article)))
(and (bound-and-true-p gnus-registry-enabled)
(gnus-try-warping-via-registry)))))
(defun gnus-request-head (article group)
"Request the head of ARTICLE in GROUP."
(let* ((gnus-command-method (gnus-find-method-for-group group))
(head (gnus-get-function gnus-command-method 'request-head t))
res clean-up)
(cond
;; Check the cache.
((and gnus-use-cache
(numberp article)
(gnus-cache-request-article article group))
(setq res (cons group article)
clean-up t))
;; Check the agent cache.
((gnus-agent-request-article article group)
(setq res (cons group article)
clean-up t))
;; Use `head' function.
((fboundp head)
(setq res (funcall head article
(and (not gnus-override-method) (gnus-group-real-name group))
(nth 1 gnus-command-method))))
;; Use `article' function.
(t
(setq res (gnus-request-article article group)
clean-up t)))
(when clean-up
(with-current-buffer nntp-server-buffer
(goto-char (point-min))
(when (search-forward "\n\n" nil t)
(delete-region (1- (point)) (point-max)))
(nnheader-fold-continuation-lines)))
res))
(defun gnus-request-body (article group)
"Request the body of ARTICLE in GROUP."
(let* ((gnus-command-method (gnus-find-method-for-group group))
(head (gnus-get-function gnus-command-method 'request-body t))
res clean-up)
(cond
;; Check the cache.
((and gnus-use-cache
(numberp article)
(gnus-cache-request-article article group))
(setq res (cons group article)
clean-up t))
;; Check the agent cache.
((gnus-agent-request-article article group)
(setq res (cons group article)
clean-up t))
;; Use `head' function.
((fboundp head)
(setq res (funcall head article (gnus-group-real-name group)
(nth 1 gnus-command-method))))
;; Use `article' function.
(t
(setq res (gnus-request-article article group)
clean-up t)))
(when clean-up
(with-current-buffer nntp-server-buffer
(goto-char (point-min))
(when (search-forward "\n\n" nil t)
(delete-region (point-min) (1- (point))))))
res))
(defun gnus-request-post (gnus-command-method)
"Post the current buffer using GNUS-COMMAND-METHOD."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-post)
(nth 1 gnus-command-method)))
(defun gnus-request-expunge-group (group gnus-command-method)
"Expunge GROUP, which is removing articles that have been marked as deleted."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-expunge-group)
(gnus-group-real-name group)
(nth 1 gnus-command-method)))
(defun gnus-request-scan (group gnus-command-method)
"Request a SCAN being performed in GROUP from GNUS-COMMAND-METHOD.
If GROUP is nil, all groups on GNUS-COMMAND-METHOD are scanned."
(let ((gnus-command-method
(if group (gnus-find-method-for-group group) gnus-command-method))
(gnus-inhibit-demon t)
(mail-source-plugged gnus-plugged))
(when (or gnus-plugged
(not (gnus-agent-method-p gnus-command-method)))
(setq gnus-internal-registry-spool-current-method gnus-command-method)
(funcall (gnus-get-function gnus-command-method 'request-scan)
(and group (gnus-group-real-name group))
(nth 1 gnus-command-method)))))
(defun gnus-request-update-info (info gnus-command-method)
(when (gnus-check-backend-function
'request-update-info (car gnus-command-method))
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(funcall (gnus-get-function gnus-command-method 'request-update-info)
(gnus-group-real-name (gnus-info-group info)) info
(nth 1 gnus-command-method))))
(defsubst gnus-request-marks (info gnus-command-method)
"Request that GNUS-COMMAND-METHOD update INFO."
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(when (gnus-check-backend-function
'request-marks (car gnus-command-method))
(let ((group (gnus-info-group info)))
(and (funcall (gnus-get-function gnus-command-method 'request-marks)
(gnus-group-real-name group)
info (nth 1 gnus-command-method))
;; If the minimum article number is greater than 1, then all
;; smaller article numbers are known not to exist; we'll
;; artificially add those to the 'read range.
(let* ((active (gnus-active group))
(min (car active)))
(when (> min 1)
(let* ((range (if (= min 2) 1 (cons 1 (1- min))))
(read (gnus-info-read info))
(new-read (gnus-range-add read (list range))))
(gnus-info-set-read info new-read)))
info)))))
(defun gnus-request-expire-articles (articles group &optional force)
(let* ((gnus-command-method (gnus-find-method-for-group group))
;; Filter out any negative article numbers; they can't be
;; expired here.
(articles
(delq nil (mapcar (lambda (n) (and (>= n 0) n)) articles)))
(gnus-inhibit-demon t)
(not-deleted
(funcall
(gnus-get-function gnus-command-method 'request-expire-articles)
articles (gnus-group-real-name group) (nth 1 gnus-command-method)
force)))
(when (and gnus-agent
(gnus-agent-method-p gnus-command-method))
(let ((expired-articles (gnus-sorted-difference articles not-deleted)))
(when expired-articles
(gnus-agent-expire expired-articles group 'force))))
not-deleted))
(defun gnus-request-move-article (article group server accept-function
&optional last move-is-internal)
(let* ((gnus-command-method (gnus-find-method-for-group group))
(result (funcall (gnus-get-function gnus-command-method
'request-move-article)
article (gnus-group-real-name group)
(nth 1 gnus-command-method) accept-function
last move-is-internal)))
(when (and result gnus-agent
(gnus-agent-method-p gnus-command-method))
(gnus-agent-unfetch-articles group (list article)))
result))
(defun gnus-request-accept-article (group &optional gnus-command-method last
no-encode)
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(when (and (not gnus-command-method)
(stringp group))
(setq gnus-command-method (or (gnus-find-method-for-group group)
(gnus-group-name-to-method group))))
(goto-char (point-max))
;; Make sure there's a newline at the end of the article.
(unless (bolp)
(insert "\n"))
(unless no-encode
(let ((message-options message-options))
(message-options-set-recipient)
(save-restriction
(message-narrow-to-head)
(mail-encode-encoded-word-buffer))
(message-encode-message-body)))
(let ((gnus-command-method (or gnus-command-method
(gnus-find-method-for-group group)))
(result
(funcall
(gnus-get-function gnus-command-method 'request-accept-article)
(if (stringp group) (gnus-group-real-name group) group)
(cadr gnus-command-method)
last)))
(when (and gnus-agent
(gnus-agent-method-p gnus-command-method)
(cdr result))
(gnus-agent-regenerate-group group (list (cdr result))))
result))
(defun gnus-request-replace-article (article group buffer &optional no-encode)
(unless no-encode
(let ((message-options message-options))
(message-options-set-recipient)
(save-restriction
(message-narrow-to-head)
(mail-encode-encoded-word-buffer))
(message-encode-message-body)))
(let* ((func (car (gnus-group-name-to-method group)))
(result (funcall (intern (format "%s-request-replace-article" func))
article (gnus-group-real-name group) buffer)))
(when (and gnus-agent (gnus-agent-method-p gnus-command-method))
(gnus-agent-regenerate-group group (list article)))
result))
(defun gnus-request-restore-buffer (article group)
"Request a new buffer restored to the state of ARTICLE."
(let ((gnus-command-method (gnus-find-method-for-group group)))
(funcall (gnus-get-function gnus-command-method 'request-restore-buffer)
article (gnus-group-real-name group)
(nth 1 gnus-command-method))))
(defun gnus-request-create-group (group &optional gnus-command-method args)
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(let ((gnus-command-method
(or gnus-command-method (gnus-find-method-for-group group))))
(funcall (gnus-get-function gnus-command-method 'request-create-group)
(gnus-group-real-name group) (nth 1 gnus-command-method) args)))
(defun gnus-request-delete-group (group &optional force)
(let* ((gnus-command-method (gnus-find-method-for-group group))
(result
(funcall (gnus-get-function gnus-command-method 'request-delete-group)
(gnus-group-real-name group) force (nth 1 gnus-command-method))))
(when result
(gnus-cache-delete-group group)
(gnus-agent-delete-group group))
result))
(defun gnus-request-rename-group (group new-name)
(let* ((gnus-command-method (gnus-find-method-for-group group))
(result
(funcall (gnus-get-function gnus-command-method 'request-rename-group)
(gnus-group-real-name group)
(gnus-group-real-name new-name) (nth 1 gnus-command-method))))
(when result
(gnus-cache-rename-group group new-name)
(gnus-agent-rename-group group new-name))
result))
(defun gnus-close-backends ()
;; Send a close request to all backends that support such a request.
(let ((methods gnus-valid-select-methods)
(gnus-inhibit-demon t)
func gnus-command-method)
(while (setq gnus-command-method (pop methods))
(when (fboundp (setq func (intern
(concat (car gnus-command-method)
"-request-close"))))
(funcall func)))))
(defun gnus-asynchronous-p (gnus-command-method)
(let ((func (gnus-get-function gnus-command-method 'asynchronous-p t)))
(when (fboundp func)
(funcall func))))
(defun gnus-remove-denial (gnus-command-method)
(when (stringp gnus-command-method)
(setq gnus-command-method (gnus-server-to-method gnus-command-method)))
(let* ((elem (assoc gnus-command-method gnus-opened-servers))
(status (cadr elem)))
;; If this hasn't been opened before, we add it to the list.
(when (eq status 'denied)
;; Set the status of this server.
(setcar (cdr elem) 'closed))))
(provide 'gnus-int)
;;; gnus-int.el ends here
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