(eval-when-compile (require 'cl))
(eval-when-compile (require 'cl))
(require 'nnoo)
(require 'message)
(require 'gnus-util)
(require 'gnus)
(require 'nnmail)
(eval-when-compile
(ignore-errors
(require 'w3)
(require 'url)
(require 'w3-forms)))
(eval '(progn
(require 'w3)
(require 'url)
(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.
Valid types include `dejanews', `dejanewsold', `reference',
and `altavista'.")
(defvoo nnweb-type-definition
'((dejanews
(article . nnweb-dejanews-wash-article)
(map . nnweb-dejanews-create-mapping)
(search . nnweb-dejanews-search)
(address . "http://x8.dejanews.com/dnquery.xp")
(identifier . nnweb-dejanews-identity))
(dejanewsold
(article . nnweb-dejanews-wash-article)
(map . nnweb-dejanews-create-mapping)
(search . nnweb-dejanewsold-search)
(address . "http://x8.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")
(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")
(identifier . identity)))
"Type-definition alist.")
(defvoo nnweb-search nil
"Search string to feed to DejaNews.")
(defvoo nnweb-max-hits 999
"Maximum number of hits to display.")
(defvoo nnweb-ephemeral-p nil
"Whether this nnweb server is ephemeral.")
(defvoo nnweb-articles nil)
(defvoo nnweb-buffer nil)
(defvoo nnweb-group-alist nil)
(defvoo nnweb-group nil)
(defvoo nnweb-hashtb nil)
(nnoo-define-basics nnweb)
(deffoo nnweb-retrieve-headers (articles &optional group server fetch-old)
(nnweb-possibly-change-server group server)
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(let (article header)
(while (setq article (pop articles))
(when (setq header (cadr (assq article nnweb-articles)))
(nnheader-insert-nov header)))
'nov)))
(deffoo nnweb-request-scan (&optional group server)
(nnweb-possibly-change-server group server)
(setq nnweb-hashtb (gnus-make-hashtable 4095))
(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 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
(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 group server)
(when (gnus-buffer-live-p nnweb-buffer)
(save-excursion
(set-buffer nnweb-buffer)
(set-buffer-modified-p nil)
(kill-buffer nnweb-buffer)))
t)
(deffoo nnweb-request-article (article &optional group server buffer)
(nnweb-possibly-change-server group server)
(save-excursion
(set-buffer (or buffer nntp-server-buffer))
(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)
(setq art (match-string 1 article)))
(and fetch
art
(nnweb-fetch-url
(format fetch article))))))
(unless nnheader-callback-function
(funcall (nnweb-definition 'article))
(nnweb-decode-entities))
(nnheader-report 'nnweb "Fetched article %s" article)
t))))
(deffoo nnweb-close-server (&optional server)
(when (and (nnweb-server-opened server)
(gnus-buffer-live-p nnweb-buffer))
(save-excursion
(set-buffer nnweb-buffer)
(set-buffer-modified-p nil)
(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 group server)
)
(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-pull group nnweb-group-alist)
(gnus-delete-file (nnweb-overview-file group))
t)
(nnoo-define-skeleton nnweb)
(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))
(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)))))
(when (and (not def)
(not noerror))
(error "Undefined definition %s" type))
def))
(defun nnweb-possibly-change-server (&optional group server)
(nnweb-init server)
(when server
(unless (nnweb-server-opened 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."
(unless (gnus-buffer-live-p nnweb-buffer)
(setq nnweb-buffer
(save-excursion
(nnheader-set-temp-buffer
(format " *nnweb %s %s %s*" nnweb-type nnweb-search server))))))
(defun nnweb-fetch-url (url)
(save-excursion
(if (not nnheader-callback-function)
(let ((buf (current-buffer)))
(save-excursion
(set-buffer nnweb-buffer)
(erase-buffer)
(url-insert-file-contents url)
(copy-to-buffer buf (point-min) (point-max))
t))
(nnweb-url-retrieve-asynch
url 'nnweb-callback (current-buffer) nnheader-callback-function)
t)))
(defun nnweb-callback (buffer callback)
(when (gnus-buffer-live-p url-working-buffer)
(save-excursion
(set-buffer url-working-buffer)
(funcall (nnweb-definition 'article))
(nnweb-decode-entities)
(set-buffer buffer)
(goto-char (point-max))
(insert-buffer-substring url-working-buffer))
(funcall callback t)
(gnus-kill-buffer url-working-buffer)))
(defun nnweb-url-retrieve-asynch (url callback &rest data)
(let ((url-request-method "GET")
(old-asynch url-be-asynchronous)
(url-request-data nil)
(url-request-extra-headers nil)
(url-working-buffer (generate-new-buffer-name " *nnweb*")))
(setq-default url-be-asynchronous t)
(save-excursion
(set-buffer (get-buffer-create url-working-buffer))
(setq url-current-callback-data data
url-be-asynchronous t
url-current-callback-func callback)
(url-retrieve url))
(setq-default url-be-asynchronous old-asynch)))
(defun nnweb-encode-www-form-urlencoded (pairs)
"Return PAIRS encoded for forms."
(mapconcat
(function
(lambda (data)
(concat (w3-form-encode-xwfu (car data)) "="
(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
'(("Content-type" . "application/x-www-form-urlencoded"))))
(url-insert-file-contents url)
(setq buffer-file-name nil))
t)
(defun nnweb-decode-entities ()
(goto-char (point-min))
(while (re-search-forward "&\\([a-z]+\\);" nil t)
(replace-match (char-to-string (or (cdr (assq (intern (match-string 1))
w3-html-entities))
?#))
t t)))
(defun nnweb-remove-markup ()
(goto-char (point-min))
(while (search-forward "<!--" nil t)
(delete-region (match-beginning 0)
(or (search-forward "-->" nil t)
(point-max))))
(goto-char (point-min))
(while (re-search-forward "<[^>]+>" nil t)
(replace-match "" t t)))
(defun nnweb-dejanews-create-mapping ()
"Perform the search and create an number-to-url alist."
(save-excursion
(set-buffer nnweb-buffer)
(erase-buffer)
(when (funcall (nnweb-definition 'search) nnweb-search)
(let ((i 0)
(more t)
(case-fold-search t)
(active (or (cadr (assoc nnweb-group nnweb-group-alist))
(cons 1 0)))
Subject (Score "0") Date Newsgroup Author
map url)
(while more
(goto-char (point-min))
(nnweb-decode-entities)
(goto-char (point-min))
(while (re-search-forward "^ <P>\n" nil t)
(narrow-to-region
(point)
(cond ((re-search-forward "^ <P>\n" nil t)
(match-beginning 0))
((search-forward "\n\n" nil t)
(point))
(t
(point-max))))
(goto-char (point-min))
(looking-at ".*HREF=\"\\([^\"]+\\)\"\\(.*\\)")
(setq url (match-string 1))
(let ((begin (point)))
(nnweb-remove-markup)
(goto-char begin)
(while (search-forward "\t" nil t)
(replace-match " "))
(goto-char begin)
(end-of-line)
(setq Subject (buffer-substring begin (point)))
(if (re-search-forward
"^ Newsgroup: \\(.*\\)\n Posted on \\([0-9/]+\\) by \\(.*\\)$" nil t)
(setq Newsgroup (match-string 1)
Date (match-string 2)
Author (match-string 3))))
(widen)
(incf i)
(unless (nnweb-get-hashtb url)
(push
(list
(incf (cdr active))
(make-full-mail-header
(cdr active) Subject Author Date
(concat "<" (nnweb-identifier url) "@dejanews>")
nil 0 (string-to-int Score) url))
map)
(nnweb-set-hashtb (cadar map) (car map))))
(if (or (not (re-search-forward
"HREF=\"\\([^\"]+\\)\"[<>b]+Next result" nil t))
(>= i nnweb-max-hits))
(setq more nil)
(setq more (match-string 1))
(erase-buffer)
(url-insert-file-contents more)))
(setq nnweb-articles
(sort (nconc nnweb-articles map) 'car-less-than-car))))))
(defun nnweb-dejanews-wash-article ()
(let ((case-fold-search t))
(goto-char (point-min))
(re-search-forward "<PRE>" nil t)
(delete-region (point-min) (point))
(re-search-forward "</PRE>" nil t)
(delete-region (point) (point-max))
(nnweb-remove-markup)
(goto-char (point-min))
(while (and (looking-at " *$")
(not (eobp)))
(gnus-delete-line))
(while (looking-at "\\(^[^ ]+:\\) *")
(replace-match "\\1 " t)
(forward-line 1))
(when (re-search-forward "\n\n+" nil t)
(replace-match "\n" t t))
(goto-char (point-min))
(when (search-forward "[More Headers]" nil t)
(replace-match "" t t))))
(defun nnweb-dejanews-search (search)
(nnweb-fetch-form
(nnweb-definition 'address)
`(("query" . ,search)
("defaultOp" . "AND")
("svcclass" . "dncurrent")
("maxhits" . "100")
("format" . "verbose2")
("threaded" . "0")
("showsort" . "date")
("agesign" . "1")
("ageweight" . "1")))
t)
(defun nnweb-dejanewsold-search (search)
(nnweb-fetch-form
(nnweb-definition 'address)
`(("query" . ,search)
("defaultOp" . "AND")
("svcclass" . "dnold")
("maxhits" . "100")
("format" . "verbose2")
("threaded" . "0")
("showsort" . "date")
("agesign" . "1")
("ageweight" . "1")))
t)
(defun nnweb-dejanews-identity (url)
"Return an unique identifier based on URL."
(if (string-match "recnum=\\([0-9]+\\)" url)
(match-string 1 url)
url))
(defun nnweb-reference-create-mapping ()
"Perform the search and create an number-to-url alist."
(save-excursion
(set-buffer nnweb-buffer)
(erase-buffer)
(when (funcall (nnweb-definition 'search) nnweb-search)
(let ((i 0)
(more t)
(case-fold-search t)
(active (or (cadr (assoc nnweb-group nnweb-group-alist))
(cons 1 0)))
Subject Score Date Newsgroups From Message-ID
map url)
(while more
(goto-char (point-min))
(search-forward "</pre><hr>" nil t)
(delete-region (point-min) (point))
(goto-char (point-min))
(while (re-search-forward "^ +[0-9]+\\." nil t)
(narrow-to-region
(point)
(if (re-search-forward "^$" nil t)
(match-beginning 0)
(point-max)))
(goto-char (point-min))
(when (looking-at ".*href=\"\\([^\"]+\\)\"")
(setq url (match-string 1)))
(nnweb-remove-markup)
(goto-char (point-min))
(while (search-forward "\t" nil t)
(replace-match " "))
(goto-char (point-min))
(while (re-search-forward "^\\([^:]+\\): \\(.*\\)$" nil t)
(set (intern (match-string 1)) (match-string 2)))
(widen)
(search-forward "</pre>" nil t)
(incf i)
(unless (nnweb-get-hashtb url)
(push
(list
(incf (cdr active))
(make-full-mail-header
(cdr active) (concat "(" Newsgroups ") " Subject) From Date
Message-ID
nil 0 (string-to-int Score) url))
map)
(nnweb-set-hashtb (cadar map) (car map))))
(setq more nil))
(setq nnweb-articles
(sort (nconc nnweb-articles map) 'car-less-than-car))))))
(defun nnweb-reference-wash-article ()
(let ((case-fold-search t))
(goto-char (point-min))
(re-search-forward "^</center><hr>" nil t)
(delete-region (point-min) (point))
(search-forward "<pre>" nil t)
(forward-line -1)
(let ((body (point-marker)))
(search-forward "</pre>" nil t)
(delete-region (point) (point-max))
(nnweb-remove-markup)
(goto-char (point-min))
(while (looking-at " *$")
(gnus-delete-line))
(narrow-to-region (point-min) body)
(while (and (re-search-forward "^$" nil t)
(not (eobp)))
(gnus-delete-line))
(goto-char (point-min))
(while (looking-at "\\(^[^ ]+:\\) *")
(replace-match "\\1 " t)
(forward-line 1))
(goto-char (point-min))
(when (re-search-forward "^References:" nil t)
(narrow-to-region
(point) (if (re-search-forward "^$\\|^[^:]+:" nil t)
(match-beginning 0)
(point-max)))
(goto-char (point-min))
(while (not (eobp))
(unless (looking-at "References")
(insert "\t")
(forward-line 1)))
(goto-char (point-min))
(while (search-forward "," nil t)
(replace-match " " t t)))
(widen)
(set-marker body nil))))
(defun nnweb-reference-search (search)
(url-insert-file-contents
(concat
(nnweb-definition 'address)
"?"
(nnweb-encode-www-form-urlencoded
`(("search" . "advanced")
("querytext" . ,search)
("subj" . "")
("name" . "")
("login" . "")
("host" . "")
("organization" . "")
("groups" . "")
("keywords" . "")
("choice" . "Search")
("startmonth" . "Jul")
("startday" . "25")
("startyear" . "1996")
("endmonth" . "Aug")
("endday" . "24")
("endyear" . "1996")
("mode" . "Quick")
("verbosity" . "Verbose")
("ranking" . "Relevance")
("first" . "1")
("last" . "25")
("score" . "50")))))
(setq buffer-file-name nil)
t)
(defun nnweb-altavista-create-mapping ()
"Perform the search and create an number-to-url alist."
(save-excursion
(set-buffer nnweb-buffer)
(erase-buffer)
(let ((part 0))
(when (funcall (nnweb-definition 'search) nnweb-search part)
(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
(goto-char (point-min))
(search-forward "<dt>" nil t)
(delete-region (point-min) (match-beginning 0))
(goto-char (point-min))
(while (search-forward "<dt>" nil t)
(replace-match "\n<blubb>"))
(nnweb-decode-entities)
(goto-char (point-min))
(while (re-search-forward "<blubb>.*href=\"\\([^\"]+\\)\"><strong>\\([^>]*\\)</strong></a><dd>\\([^-]+\\)- <b>\\([^<]+\\)<.*href=\"news:\\([^\"]+\\)\">.*\">\\(.+\\)</a><P>"
nil t)
(setq url (match-string 1)
subject (match-string 2)
date (match-string 3)
group (match-string 4)
id (concat "<" (match-string 5) ">")
from (match-string 6))
(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))))
(when (or (not nnweb-articles)
(>= i nnweb-max-hits)
(not (funcall (nnweb-definition 'search)
nnweb-search (incf part))))
(setq more nil)))
(setq nnweb-articles
(sort (nconc nnweb-articles map) 'car-less-than-car)))))))
(defun nnweb-altavista-wash-article ()
(goto-char (point-min))
(let ((case-fold-search t))
(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)
(forward-line 1))
(when (re-search-backward "^References:" nil 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)))
(defun nnweb-altavista-search (search &optional part)
(url-insert-file-contents
(concat
(nnweb-definition 'address)
"?"
(nnweb-encode-www-form-urlencoded
`(("pg" . "aq")
("what" . "news")
,@(when part `(("stq" . ,(int-to-string (* part 30)))))
("fmt" . "d")
("q" . ,search)
("r" . "")
("d0" . "")
("d1" . "")))))
(setq buffer-file-name nil)
t)
(provide 'nnweb)