;;; nnweb.el --- retrieving articles via web search engines
-;; Copyright (C) 1996 Free Software Foundation, Inc.
+;; Copyright (C) 1996,97 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; Keywords: news
(require 'nnoo)
(require 'message)
(require 'gnus-util)
+(require 'gnus)
(require 'w3)
-(require 'w3-forms)
(require 'url)
+(require 'nnmail)
+(ignore-errors
+ (require 'w3-forms))
(nnoo-declare nnweb)
+(defvoo nnweb-directory (nnheader-concat gnus-directory "nnweb/")
+ "Where nnweb will save its files.")
+
(defvoo nnweb-type 'dejanews
"What search engine type is being used.")
(article . nnweb-dejanews-wash-article)
(map . nnweb-dejanews-create-mapping)
(search . nnweb-dejanews-search)
- (address . "http://search.dejanews.com/dnquery.xp"))
+ (address . "http://xp9.dejanews.com/dnquery.xp")
+ (identifier . nnweb-dejanews-identity))
(reference
(article . nnweb-reference-wash-article)
(map . nnweb-reference-create-mapping)
(search . nnweb-reference-search)
- (address . "http://www.reference.com/cgi-bin/pn/go"))
+ (address . "http://www.reference.com/cgi-bin/pn/go")
+ (identifier . identity))
(altavista
(article . nnweb-altavista-wash-article)
(map . nnweb-altavista-create-mapping)
(search . nnweb-altavista-search)
(address . "http://www.altavista.digital.com/cgi-bin/query")
- (id . "/cgi-bin/news?id@%s")))
+ (id . "/cgi-bin/news?id@%s")
+ (identifier . identity)))
"Type-definition alist.")
(defvoo nnweb-search nil
(defvoo nnweb-max-hits 100
"Maximum number of hits to display.")
+(defvoo nnweb-ephemeral-p nil
+ "Whether this nnweb server is ephemeral.")
+
;;; Internal variables
(defvoo nnweb-articles nil)
(defvoo nnweb-buffer nil)
+(defvoo nnweb-group-alist nil)
+(defvoo nnweb-group nil)
+(defvoo nnweb-hashtb nil)
;;; Interface functions
(nnoo-define-basics nnweb)
(deffoo nnweb-retrieve-headers (articles &optional group server fetch-old)
- (nnweb-possibly-change-server server)
+ (nnweb-possibly-change-server group server)
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(nnheader-insert-nov header)))
'nov)))
+(deffoo nnweb-request-scan (&optional group server)
+ (nnweb-possibly-change-server group server)
+ (funcall (nnweb-definition 'map))
+ (unless nnweb-ephemeral-p
+ (nnweb-write-active)
+ (nnweb-write-overview group)))
+
(deffoo nnweb-request-group (group &optional server dont-check)
- (nnweb-possibly-change-server server)
- (when (or (not dont-check)
- (not nnweb-articles))
- (funcall (nnweb-definition 'map)))
+ (nnweb-possibly-change-server nil server)
+ (when (and group
+ (not (equal group nnweb-group))
+ (not nnweb-ephemeral-p))
+ (let ((info (assoc group nnweb-group-alist)))
+ (setq nnweb-group group)
+ (setq nnweb-type (nth 2 info))
+ (setq nnweb-search (nth 3 info))
+ (unless dont-check
+ (nnweb-read-overview group))))
(cond
((not nnweb-articles)
(nnheader-report 'nnweb "No matching articles"))
(t
- (nnheader-report 'nnweb "Opened group %s" group)
- (nnheader-insert
- "211 %d %d %d %s\n" (length nnweb-articles)
- (caar nnweb-articles) (caar (last nnweb-articles))
- group))))
+ (let ((active (if nnweb-ephemeral-p
+ (cons (caar nnweb-articles)
+ (caar (last nnweb-articles)))
+ (cadr (assoc group nnweb-group-alist)))))
+ (nnheader-report 'nnweb "Opened group %s" group)
+ (nnheader-insert
+ "211 %d %d %d %s\n" (length nnweb-articles)
+ (car active) (cdr active) group)))))
(deffoo nnweb-close-group (group &optional server)
- (nnweb-possibly-change-server server)
+ (nnweb-possibly-change-server group server)
(when (gnus-buffer-live-p nnweb-buffer)
(save-excursion
(set-buffer nnweb-buffer)
t)
(deffoo nnweb-request-article (article &optional group server buffer)
- (nnweb-possibly-change-server server)
+ (nnweb-possibly-change-server group server)
(save-excursion
(set-buffer (or buffer nntp-server-buffer))
- (let ((url (caddr (assq article nnweb-articles))))
+ (let* ((header (cadr (assq article nnweb-articles)))
+ (url (and header (mail-header-xref header))))
(when (or (and url
(nnweb-fetch-url url))
(and (stringp article)
+ (nnweb-definition 'id t)
(let ((fetch (nnweb-definition 'id))
art)
(when (string-match "^<\\(.*\\)>$" article)
(kill-buffer nnweb-buffer)))
(nnoo-close-server 'nnweb server))
+(deffoo nnweb-request-list (&optional server)
+ (nnweb-possibly-change-server nil server)
+ (save-excursion
+ (set-buffer nntp-server-buffer)
+ (nnmail-generate-active nnweb-group-alist)
+ t))
+
(deffoo nnweb-request-update-info (group info &optional server)
- (nnweb-possibly-change-server server)
- (setcar (cddr info) nil))
+ (nnweb-possibly-change-server group server)
+ ;;(setcar (cddr info) nil)
+ )
(deffoo nnweb-asynchronous-p ()
t)
+(deffoo nnweb-request-create-group (group &optional server args)
+ (nnweb-possibly-change-server nil server)
+ (nnweb-request-delete-group group)
+ (push `(,group ,(cons 1 0) ,@args) nnweb-group-alist)
+ (nnweb-write-active)
+ t)
+
+(deffoo nnweb-request-delete-group (group &optional force server)
+ (nnweb-possibly-change-server group server)
+ (gnus-delete-assoc group nnweb-group-alist)
+ (gnus-delete-file (nnweb-overview-file group))
+ t)
+
(nnoo-define-skeleton nnweb)
;;; Internal functions
-(defun nnweb-definition (type)
+(defun nnweb-read-overview (group)
+ "Read the overview of GROUP and build the map."
+ (when (file-exists-p (nnweb-overview-file group))
+ (nnheader-temp-write nil
+ (nnheader-insert-file-contents (nnweb-overview-file group))
+ (goto-char (point-min))
+ (setq nnweb-hashtb (gnus-make-hashtable
+ (count-lines (point-min) (point-max))))
+ (let (header)
+ (while (not (eobp))
+ (setq header (nnheader-parse-nov))
+ (forward-line 1)
+ (push (list (mail-header-number header)
+ header (mail-header-xref header))
+ nnweb-articles)
+ (nnweb-set-hashtb header (car nnweb-articles)))))))
+
+(defun nnweb-write-overview (group)
+ "Write the overview file for GROUP."
+ (nnheader-temp-write (nnweb-overview-file group)
+ (let ((articles nnweb-articles))
+ (while articles
+ (nnheader-insert-nov (cadr (pop articles)))))))
+
+(defun nnweb-set-hashtb (header data)
+ (gnus-sethash (nnweb-identifier (mail-header-xref header))
+ data nnweb-hashtb))
+
+(defun nnweb-get-hashtb (url)
+ (gnus-gethash (nnweb-identifier url) nnweb-hashtb))
+
+(defun nnweb-identifier (ident)
+ (funcall (nnweb-definition 'identifier) ident))
+
+(defun nnweb-overview-file (group)
+ "Return the name of the overview file of GROUP."
+ (nnheader-concat nnweb-directory group ".overview"))
+
+(defun nnweb-write-active ()
+ "Save the active file."
+ (nnheader-temp-write (nnheader-concat nnweb-directory "active")
+ (prin1 `(setq nnweb-group-alist ',nnweb-group-alist) (current-buffer))))
+
+(defun nnweb-read-active ()
+ "Read the active file."
+ (load (nnheader-concat nnweb-directory "active") t t t))
+
+(defun nnweb-definition (type &optional noerror)
"Return the definition of TYPE."
(let ((def (cdr (assq type (assq nnweb-type nnweb-type-definition)))))
- (unless def
+ (when (and (not def)
+ (not noerror))
(error "Undefined definition %s" type))
def))
-(defun nnweb-possibly-change-server (&optional server)
+(defun nnweb-possibly-change-server (&optional group server)
(nnweb-init server)
(when server
(unless (nnweb-server-opened server)
- (nnweb-open-server server))))
+ (nnweb-open-server server)))
+ (unless nnweb-group-alist
+ (nnweb-read-active))
+ (when group
+ (when (and (not nnweb-ephemeral-p)
+ (not (equal group nnweb-group)))
+ (nnweb-request-group group nil t))))
(defun nnweb-init (server)
"Initialize buffers and such."
(defun nnweb-encode-www-form-urlencoded (pairs)
"Return PAIRS encoded for forms."
- (mapconcat
+ (mapconcat
(function
(lambda (data)
(concat (w3-form-encode-xwfu (car data)) "="
- (w3-form-encode-xwfu (cdr data))))) pairs "&"))
+ (w3-form-encode-xwfu (cdr data)))))
+ pairs "&"))
(defun nnweb-fetch-form (url pairs)
(let ((url-request-data (nnweb-encode-www-form-urlencoded pairs))
- (url-request-method 'POST)
- (url-request-extra-headers
+ (url-request-method "POST")
+ (url-request-extra-headers
'(("Content-type" . "application/x-www-form-urlencoded"))))
(url-insert-file-contents url)
(setq buffer-file-name nil))
(let ((i 0)
(more t)
(case-fold-search t)
+ (active (or (cadr (assoc nnweb-group nnweb-group-alist))
+ (cons 1 0)))
Subject Score Date Newsgroup Author
map url)
(while more
(nnweb-decode-entities)
(goto-char (point-min))
(while (re-search-forward "^ +[0-9]+\\." nil t)
- (narrow-to-region
- (point)
+ (narrow-to-region
+ (point)
(cond ((re-search-forward "^ +[0-9]+\\." nil t)
(match-beginning 0))
((search-forward "\n\n" nil t)
(widen)
(when (string-match "#[0-9]+/[0-9]+ *$" Subject)
(setq Subject (substring Subject 0 (match-beginning 0))))
- (push
- (list
- (incf i)
- (make-full-mail-header
- i (concat "(" Newsgroup ") " Subject) Author Date
- (concat "<" (message-unique-id) "-" (int-to-string i)
- "@dejanews>")
- nil 0 (string-to-int Score) nil)
- url)
- map))
+ (incf i)
+ (unless (nnweb-get-hashtb url)
+ (push
+ (list
+ (incf (cdr active))
+ (make-full-mail-header
+ (cdr active) (concat "(" Newsgroup ") " Subject) Author Date
+ (concat "<" (nnweb-identifier url) "@dejanews>")
+ nil 0 (string-to-int Score) url))
+ map)
+ (nnweb-set-hashtb (cadar map) (car map))))
;; See whether there is a "Get next 20 hits" button here.
(if (or (not (re-search-forward
"HREF=\"\\([^\"]+\\)\">Get next" nil t))
(erase-buffer)
(url-insert-file-contents more)))
;; Return the articles in the right order.
- (setq nnweb-articles (nreverse map))))))
+ (setq nnweb-articles
+ (sort (nconc nnweb-articles map)
+ (lambda (s1 s2) (< (car s1) (car s2)))))))))
(defun nnweb-dejanews-wash-article ()
(let ((case-fold-search t))
(replace-match "\n" t t))))
(defun nnweb-dejanews-search (search)
- (nnweb-fetch-form
+ (nnweb-fetch-form
(nnweb-definition 'address)
`(("query" . ,search)
("defaultOp" . "AND")
("ageweight" . "1")))
t)
+(defun nnweb-dejanews-identity (url)
+ "Return an unique identifier based on URL."
+ (if (string-match "recnum=\\([0-9]+\\)" url)
+ (match-string 1 url)
+ url))
+
;;;
;;; InReference
;;;
(let ((i 0)
(more t)
(case-fold-search t)
+ (active (or (cadr (assoc nnweb-group nnweb-group-alist))
+ (cons 1 0)))
Subject Score Date Newsgroups From Message-ID
map url)
(while more
;(nnweb-decode-entities)
(goto-char (point-min))
(while (re-search-forward "^ +[0-9]+\\." nil t)
- (narrow-to-region
- (point)
+ (narrow-to-region
+ (point)
(if (re-search-forward "^$" nil t)
(match-beginning 0)
(point-max)))
(set (intern (match-string 1)) (match-string 2)))
(widen)
(search-forward "</pre>" nil t)
- (push
- (list
- (incf i)
- (make-full-mail-header
- i (concat "(" Newsgroups ") " Subject) From Date
- Message-ID
- nil 0 (string-to-int Score) nil)
- url)
- map))
+ (incf i)
+ (unless (nnweb-get-hashtb url)
+ (push
+ (list
+ (incf (cdr active))
+ (make-full-mail-header
+ (cdr active) (concat "(" Newsgroups ") " Subject) From Date
+ Message-ID
+ nil 0 (string-to-int Score) url))
+ map)
+ (nnweb-set-hashtb (cadar map) (car map))))
(setq more nil))
;; Return the articles in the right order.
- (setq nnweb-articles (nreverse map))))))
+ (setq nnweb-articles
+ (sort (nconc nnweb-articles map)
+ (lambda (s1 s2) (< (car s1) (car s2)))))))))
(defun nnweb-reference-wash-article ()
(let ((case-fold-search t))
(defun nnweb-reference-search (search)
(prog1
(url-insert-file-contents
- (concat
+ (concat
(nnweb-definition 'address)
"?"
- (nnweb-encode-www-form-urlencoded
+ (nnweb-encode-www-form-urlencoded
`(("search" . "advanced")
("querytext" . ,search)
("subj" . "")
(let ((i 0)
(more t)
(case-fold-search t)
+ (active (or (cadr (assoc nnweb-group nnweb-group-alist))
+ (cons 1 0)))
subject date from id group
map url)
(while more
group (match-string 4)
id (concat "<" (match-string 5) ">")
from (match-string 6))
- (push
- (list
- (incf i)
- (make-full-mail-header
- i (concat "(" group ") " subject) from date
- id nil 0 0 nil)
- url)
- map))
+ (incf i)
+ (unless (nnweb-get-hashtb url)
+ (push
+ (list
+ (incf (cdr active))
+ (make-full-mail-header
+ (cdr active) (concat "(" group ") " subject) from date
+ id nil 0 0 url))
+ map)
+ (nnweb-set-hashtb (cadar map) (car map))))
;; See if we want more.
(when (or (not nnweb-articles)
(>= i nnweb-max-hits)
nnweb-search (incf part))))
(setq more nil)))
;; Return the articles in the right order.
- (setq nnweb-articles (nreverse map)))))))
+ (setq nnweb-articles
+ (sort (nconc nnweb-articles map)
+ (lambda (s1 s2) (< (car s1) (car s2))))))))))
(defun nnweb-altavista-wash-article ()
(goto-char (point-min))
(let ((case-fold-search t))
- (when (re-search-forward "<H1>\\(.*\\)</H1>" nil t)
- (setq subject (match-string 1)))
- (re-search-forward "^<strong>" nil t)
- (delete-region (point-min) (match-beginning 0))
+ (when (re-search-forward "^<strong>" nil t)
+ (delete-region (point-min) (match-beginning 0)))
(goto-char (point-min))
(while (looking-at "<strong>\\([^ ]+\\) +</strong> +\\(.*\\)$")
(replace-match "\\1: \\2" t)
(narrow-to-region (point) (progn (forward-line 1) (point)))
(goto-char (point-min))
(while (re-search-forward "<A.*\\?id@\\([^\"]+\\)\">[0-9]+</A>" nil t)
- (replace-match "<\\1> " t))
- (widen)
- (nnweb-remove-markup))))
+ (replace-match "<\\1> " t)))
+ (widen)
+ (nnweb-remove-markup)))
(defun nnweb-altavista-search (search &optional part)
(prog1
(url-insert-file-contents
- (concat
+ (concat
(nnweb-definition 'address)
"?"
- (nnweb-encode-www-form-urlencoded
+ (nnweb-encode-www-form-urlencoded
`(("pg" . "aq")
("what" . "news")
- ,@(if part `(("stq" . ,(int-to-string (* part 30)))))
+ ,@(when part `(("stq" . ,(int-to-string (* part 30)))))
("fmt" . "d")
("q" . ,search)
("r" . "")
("d0" . "")
("d1" . "")))))
- (setq buffer-file-name nil))
- )t
+ (setq buffer-file-name nil)))
(provide 'nnweb)
projects / gnus / blobdiff