mirror of
https://git.savannah.gnu.org/git/emacs.git
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cd942edc7c
* nnweb.el (nnweb-decode-entities): Work for non-character
entities.
2000-10-08 10:59:13 ShengHuo ZHU <zsh@cs.rochester.edu>
* nnweb.el (nnweb-url-retrieve-asynch): url-retrieve is
asynchronous in Exp version.
828 lines
25 KiB
EmacsLisp
828 lines
25 KiB
EmacsLisp
;;; nnweb.el --- retrieving articles via web search engines
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;; Copyright (C) 1996, 1997, 1998, 1999, 2000
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;; Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; Note: You need to have `url' and `w3' installed for this
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;; backend to work.
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'nnoo)
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(require 'message)
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(require 'gnus-util)
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(require 'gnus)
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(require 'nnmail)
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(require 'mm-util)
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(eval-when-compile
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(ignore-errors
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(require 'w3)
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(require 'url)
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(require 'w3-forms)))
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;; Report failure to find w3 at load time if appropriate.
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(unless noninteractive
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(eval '(progn
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(require 'w3)
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(require 'url)
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(require 'w3-forms))))
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(nnoo-declare nnweb)
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(defvoo nnweb-directory (nnheader-concat gnus-directory "nnweb/")
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"Where nnweb will save its files.")
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(defvoo nnweb-type 'dejanews
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"What search engine type is being used.
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Valid types include `dejanews', `dejanewsold', `reference',
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and `altavista'.")
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(defvar nnweb-type-definition
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'((dejanews
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(article . ignore)
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(id . "http://search.dejanews.com/msgid.xp?MID=%s&fmt=text")
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(map . nnweb-dejanews-create-mapping)
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(search . nnweb-dejanews-search)
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(address . "http://www.deja.com/=dnc/qs.xp")
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(identifier . nnweb-dejanews-identity))
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(dejanewsold
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(article . ignore)
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(map . nnweb-dejanews-create-mapping)
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(search . nnweb-dejanewsold-search)
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(address . "http://www.deja.com/dnquery.xp")
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(identifier . nnweb-dejanews-identity))
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(reference
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(article . nnweb-reference-wash-article)
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(map . nnweb-reference-create-mapping)
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(search . nnweb-reference-search)
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(address . "http://www.reference.com/cgi-bin/pn/go")
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(identifier . identity))
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(altavista
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(article . nnweb-altavista-wash-article)
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(map . nnweb-altavista-create-mapping)
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(search . nnweb-altavista-search)
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(address . "http://www.altavista.digital.com/cgi-bin/query")
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(id . "/cgi-bin/news?id@%s")
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(identifier . identity)))
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"Type-definition alist.")
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(defvoo nnweb-search nil
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"Search string to feed to DejaNews.")
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(defvoo nnweb-max-hits 999
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"Maximum number of hits to display.")
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(defvoo nnweb-ephemeral-p nil
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"Whether this nnweb server is ephemeral.")
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;;; Internal variables
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(defvoo nnweb-articles nil)
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(defvoo nnweb-buffer nil)
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(defvoo nnweb-group-alist nil)
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(defvoo nnweb-group nil)
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(defvoo nnweb-hashtb nil)
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;;; Interface functions
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(nnoo-define-basics nnweb)
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(deffoo nnweb-retrieve-headers (articles &optional group server fetch-old)
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(nnweb-possibly-change-server group server)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(let (article header)
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(mm-with-unibyte-current-buffer
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(while (setq article (pop articles))
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(when (setq header (cadr (assq article nnweb-articles)))
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(nnheader-insert-nov header))))
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'nov)))
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(deffoo nnweb-request-scan (&optional group server)
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(nnweb-possibly-change-server group server)
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(funcall (nnweb-definition 'map))
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(unless nnweb-ephemeral-p
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(nnweb-write-active)
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(nnweb-write-overview group)))
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(deffoo nnweb-request-group (group &optional server dont-check)
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(nnweb-possibly-change-server nil server)
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(when (and group
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(not (equal group nnweb-group))
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(not nnweb-ephemeral-p))
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(let ((info (assoc group nnweb-group-alist)))
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(when info
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(setq nnweb-group group)
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(setq nnweb-type (nth 2 info))
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(setq nnweb-search (nth 3 info))
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(unless dont-check
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(nnweb-read-overview group)))))
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(cond
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((not nnweb-articles)
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(nnheader-report 'nnweb "No matching articles"))
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(t
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(let ((active (if nnweb-ephemeral-p
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(cons (caar nnweb-articles)
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(caar (last nnweb-articles)))
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(cadr (assoc group nnweb-group-alist)))))
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(nnheader-report 'nnweb "Opened group %s" group)
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(nnheader-insert
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"211 %d %d %d %s\n" (length nnweb-articles)
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(car active) (cdr active) group)))))
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(deffoo nnweb-close-group (group &optional server)
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(nnweb-possibly-change-server group server)
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(when (gnus-buffer-live-p nnweb-buffer)
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(save-excursion
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(set-buffer nnweb-buffer)
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(set-buffer-modified-p nil)
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(kill-buffer nnweb-buffer)))
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t)
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(deffoo nnweb-request-article (article &optional group server buffer)
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(nnweb-possibly-change-server group server)
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(save-excursion
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(set-buffer (or buffer nntp-server-buffer))
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(let* ((header (cadr (assq article nnweb-articles)))
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(url (and header (mail-header-xref header))))
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(when (or (and url
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(mm-with-unibyte-current-buffer
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(nnweb-fetch-url url)))
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(and (stringp article)
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(nnweb-definition 'id t)
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(let ((fetch (nnweb-definition 'id))
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art)
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(when (string-match "^<\\(.*\\)>$" article)
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(setq art (match-string 1 article)))
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(and fetch
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art
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(mm-with-unibyte-current-buffer
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(nnweb-fetch-url
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(format fetch article)))))))
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(unless nnheader-callback-function
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(funcall (nnweb-definition 'article))
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(nnweb-decode-entities))
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(nnheader-report 'nnweb "Fetched article %s" article)
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(cons group (and (numberp article) article))))))
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(deffoo nnweb-close-server (&optional server)
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(when (and (nnweb-server-opened server)
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(gnus-buffer-live-p nnweb-buffer))
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(save-excursion
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(set-buffer nnweb-buffer)
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(set-buffer-modified-p nil)
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(kill-buffer nnweb-buffer)))
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(nnoo-close-server 'nnweb server))
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(deffoo nnweb-request-list (&optional server)
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(nnweb-possibly-change-server nil server)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(nnmail-generate-active nnweb-group-alist)
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t))
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(deffoo nnweb-request-update-info (group info &optional server)
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(nnweb-possibly-change-server group server))
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(deffoo nnweb-asynchronous-p ()
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t)
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(deffoo nnweb-request-create-group (group &optional server args)
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(nnweb-possibly-change-server nil server)
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(nnweb-request-delete-group group)
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(push `(,group ,(cons 1 0) ,@args) nnweb-group-alist)
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(nnweb-write-active)
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t)
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(deffoo nnweb-request-delete-group (group &optional force server)
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(nnweb-possibly-change-server group server)
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(gnus-pull group nnweb-group-alist t)
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(nnweb-write-active)
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(gnus-delete-file (nnweb-overview-file group))
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t)
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(nnoo-define-skeleton nnweb)
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;;; Internal functions
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(defun nnweb-read-overview (group)
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"Read the overview of GROUP and build the map."
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(when (file-exists-p (nnweb-overview-file group))
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(mm-with-unibyte-buffer
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(nnheader-insert-file-contents (nnweb-overview-file group))
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(goto-char (point-min))
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(let (header)
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(while (not (eobp))
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(setq header (nnheader-parse-nov))
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(forward-line 1)
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(push (list (mail-header-number header)
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header (mail-header-xref header))
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nnweb-articles)
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(nnweb-set-hashtb header (car nnweb-articles)))))))
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(defun nnweb-write-overview (group)
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"Write the overview file for GROUP."
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(with-temp-file (nnweb-overview-file group)
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(let ((articles nnweb-articles))
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(while articles
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(nnheader-insert-nov (cadr (pop articles)))))))
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(defun nnweb-set-hashtb (header data)
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(gnus-sethash (nnweb-identifier (mail-header-xref header))
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data nnweb-hashtb))
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(defun nnweb-get-hashtb (url)
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(gnus-gethash (nnweb-identifier url) nnweb-hashtb))
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(defun nnweb-identifier (ident)
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(funcall (nnweb-definition 'identifier) ident))
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(defun nnweb-overview-file (group)
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"Return the name of the overview file of GROUP."
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(nnheader-concat nnweb-directory group ".overview"))
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(defun nnweb-write-active ()
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"Save the active file."
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(gnus-make-directory nnweb-directory)
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(with-temp-file (nnheader-concat nnweb-directory "active")
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(prin1 `(setq nnweb-group-alist ',nnweb-group-alist) (current-buffer))))
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(defun nnweb-read-active ()
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"Read the active file."
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(load (nnheader-concat nnweb-directory "active") t t t))
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(defun nnweb-definition (type &optional noerror)
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"Return the definition of TYPE."
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(let ((def (cdr (assq type (assq nnweb-type nnweb-type-definition)))))
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(when (and (not def)
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(not noerror))
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(error "Undefined definition %s" type))
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def))
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(defun nnweb-possibly-change-server (&optional group server)
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(nnweb-init server)
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(when server
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(unless (nnweb-server-opened server)
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(nnweb-open-server server)))
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(unless nnweb-group-alist
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(nnweb-read-active))
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(when group
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(when (and (not nnweb-ephemeral-p)
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(not (equal group nnweb-group)))
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(setq nnweb-hashtb (gnus-make-hashtable 4095))
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(nnweb-request-group group nil t))))
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(defun nnweb-init (server)
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"Initialize buffers and such."
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(unless (gnus-buffer-live-p nnweb-buffer)
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(setq nnweb-buffer
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(save-excursion
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(mm-with-unibyte
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(nnheader-set-temp-buffer
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(format " *nnweb %s %s %s*"
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nnweb-type nnweb-search server))
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(current-buffer))))))
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(defun nnweb-fetch-url (url)
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(let (buf)
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(save-excursion
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(if (not nnheader-callback-function)
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(progn
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(with-temp-buffer
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(mm-enable-multibyte)
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(let ((coding-system-for-read 'binary)
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(coding-system-for-write 'binary)
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(default-process-coding-system 'binary))
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(nnweb-insert url))
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(setq buf (buffer-string)))
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(erase-buffer)
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(insert buf)
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t)
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(nnweb-url-retrieve-asynch
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url 'nnweb-callback (current-buffer) nnheader-callback-function)
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t))))
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(defun nnweb-callback (buffer callback)
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(when (gnus-buffer-live-p url-working-buffer)
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(save-excursion
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(set-buffer url-working-buffer)
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(funcall (nnweb-definition 'article))
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(nnweb-decode-entities)
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(set-buffer buffer)
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(goto-char (point-max))
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(insert-buffer-substring url-working-buffer))
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(funcall callback t)
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(gnus-kill-buffer url-working-buffer)))
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(defun nnweb-url-retrieve-asynch (url callback &rest data)
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(let ((url-request-method "GET")
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(old-asynch url-be-asynchronous)
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(url-request-data nil)
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(url-request-extra-headers nil)
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(url-working-buffer (generate-new-buffer-name " *nnweb*")))
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(setq-default url-be-asynchronous t)
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(save-excursion
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(set-buffer (get-buffer-create url-working-buffer))
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(setq url-current-callback-data data
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url-be-asynchronous t
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url-current-callback-func callback)
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(url-retrieve url nil))
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(setq-default url-be-asynchronous old-asynch)))
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(if (fboundp 'url-retrieve-synchronously)
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(defun nnweb-url-retrieve-asynch (url callback &rest data)
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(url-retrieve url callback data)))
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;;;
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;;; DejaNews functions.
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;;;
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(defun nnweb-dejanews-create-mapping ()
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"Perform the search and create an number-to-url alist."
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(save-excursion
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(set-buffer nnweb-buffer)
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(erase-buffer)
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(when (funcall (nnweb-definition 'search) nnweb-search)
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(let ((i 0)
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(more t)
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(case-fold-search t)
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(active (or (cadr (assoc nnweb-group nnweb-group-alist))
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(cons 1 0)))
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subject date from
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map url parse a table group text)
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(while more
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;; Go through all the article hits on this page.
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(goto-char (point-min))
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(setq parse (w3-parse-buffer (current-buffer))
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table (nth 1 (nnweb-parse-find-all 'table parse)))
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(dolist (row (nth 2 (car (nth 2 table))))
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(setq a (nnweb-parse-find 'a row)
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url (cdr (assq 'href (nth 1 a)))
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text (nreverse (nnweb-text row)))
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(when a
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(setq subject (nth 4 text)
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group (nth 2 text)
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date (nth 1 text)
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from (nth 0 text))
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(if (string-match "\\([0-9]+\\)/\\([0-9]+\\)/\\([0-9]+\\)" date)
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(setq date (format "%s %s 00:00:00 %s"
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(car (rassq (string-to-number
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(match-string 2 date))
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parse-time-months))
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(match-string 3 date)
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(match-string 1 date)))
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(setq date "Jan 1 00:00:00 0000"))
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(incf i)
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(setq url (concat url "&fmt=text"))
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(when (string-match "&context=[^&]+" url)
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(setq url (replace-match "" t t url)))
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(unless (nnweb-get-hashtb url)
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(push
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(list
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(incf (cdr active))
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(make-full-mail-header
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(cdr active) (concat subject " (" group ")") from date
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(concat "<" (nnweb-identifier url) "@dejanews>")
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nil 0 0 url))
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map)
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(nnweb-set-hashtb (cadar map) (car map)))))
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;; See whether there is a "Get next 20 hits" button here.
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(goto-char (point-min))
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(if (or (not (re-search-forward
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"HREF=\"\\([^\"]+\\)\"[<>b]+Next result" nil t))
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(>= i nnweb-max-hits))
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(setq more nil)
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;; Yup -- fetch it.
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(setq more (match-string 1))
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(erase-buffer)
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(url-insert-file-contents more)))
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;; Return the articles in the right order.
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(setq nnweb-articles
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(sort (nconc nnweb-articles map) 'car-less-than-car))))))
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(defun nnweb-dejanews-search (search)
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(nnweb-insert
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(concat
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(nnweb-definition 'address)
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"?"
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(nnweb-encode-www-form-urlencoded
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`(("ST" . "PS")
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("svcclass" . "dnyr")
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("QRY" . ,search)
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("defaultOp" . "AND")
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("DBS" . "1")
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("OP" . "dnquery.xp")
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("LNG" . "ALL")
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("maxhits" . "100")
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("threaded" . "0")
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("format" . "verbose2")
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("showsort" . "date")
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("agesign" . "1")
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("ageweight" . "1")))))
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t)
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(defun nnweb-dejanewsold-search (search)
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(nnweb-fetch-form
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(nnweb-definition 'address)
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`(("query" . ,search)
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("defaultOp" . "AND")
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("svcclass" . "dnold")
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("maxhits" . "100")
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("format" . "verbose2")
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("threaded" . "0")
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("showsort" . "date")
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("agesign" . "1")
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("ageweight" . "1")))
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t)
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(defun nnweb-dejanews-identity (url)
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"Return an unique identifier based on URL."
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(if (string-match "AN=\\([0-9]+\\)" url)
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(match-string 1 url)
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url))
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;;;
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;;; InReference
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;;;
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(defun nnweb-reference-create-mapping ()
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"Perform the search and create an number-to-url alist."
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(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
|
|
;; Go through all the article hits on this page.
|
|
(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 "^\\([^:]+\\): \\(.*\\)$" nil t)
|
|
(set (intern (match-string 1)) (match-string 2)))
|
|
(widen)
|
|
(search-forward "</pre>" nil t)
|
|
(incf i)
|
|
(unless (nnweb-get-hashtb url)
|
|
(push
|
|
(list
|
|
(incf (cdr active))
|
|
(make-full-mail-header
|
|
(cdr active) (concat "(" Newsgroups ") " Subject) From Date
|
|
Message-ID
|
|
nil 0 (string-to-int Score) url))
|
|
map)
|
|
(nnweb-set-hashtb (cadar map) (car map))))
|
|
(setq more nil))
|
|
;; Return the articles in the right order.
|
|
(setq nnweb-articles
|
|
(sort (nconc nnweb-articles map) 'car-less-than-car))))))
|
|
|
|
(defun nnweb-reference-wash-article ()
|
|
(let ((case-fold-search t))
|
|
(goto-char (point-min))
|
|
(re-search-forward "^</center><hr>" nil t)
|
|
(delete-region (point-min) (point))
|
|
(search-forward "<pre>" nil t)
|
|
(forward-line -1)
|
|
(let ((body (point-marker)))
|
|
(search-forward "</pre>" nil t)
|
|
(delete-region (point) (point-max))
|
|
(nnweb-remove-markup)
|
|
(goto-char (point-min))
|
|
(while (looking-at " *$")
|
|
(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)
|
|
|
|
;;;
|
|
;;; Alta Vista
|
|
;;;
|
|
|
|
(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
|
|
;; Go through all the article hits on this page.
|
|
(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))))
|
|
;; See if we want more.
|
|
(when (or (not nnweb-articles)
|
|
(>= i nnweb-max-hits)
|
|
(not (funcall (nnweb-definition 'search)
|
|
nnweb-search (incf part))))
|
|
(setq more nil)))
|
|
;; Return the articles in the right order.
|
|
(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)
|
|
|
|
;;;
|
|
;;; General web/w3 interface utility functions
|
|
;;;
|
|
|
|
(defun nnweb-insert-html (parse)
|
|
"Insert HTML based on a w3 parse tree."
|
|
(if (stringp parse)
|
|
(insert parse)
|
|
(insert "<" (symbol-name (car parse)) " ")
|
|
(insert (mapconcat
|
|
(lambda (param)
|
|
(concat (symbol-name (car param)) "="
|
|
(prin1-to-string
|
|
(if (consp (cdr param))
|
|
(cadr param)
|
|
(cdr param)))))
|
|
(nth 1 parse)
|
|
" "))
|
|
(insert ">\n")
|
|
(mapcar 'nnweb-insert-html (nth 2 parse))
|
|
(insert "</" (symbol-name (car parse)) ">\n")))
|
|
|
|
(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)
|
|
"Fetch a form from URL with PAIRS as the data using the POST method."
|
|
(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 ()
|
|
"Decode all HTML entities."
|
|
(goto-char (point-min))
|
|
(while (re-search-forward "&\\(#[0-9]+\\|[a-z]+\\);" nil t)
|
|
(let ((elem (if (eq (aref (match-string 1) 0) ?\#)
|
|
(let ((c
|
|
(string-to-number (substring
|
|
(match-string 1) 1))))
|
|
(if (mm-char-or-char-int-p c) c 32))
|
|
(or (cdr (assq (intern (match-string 1))
|
|
w3-html-entities))
|
|
?#))))
|
|
(unless (stringp elem)
|
|
(setq elem (char-to-string elem)))
|
|
(replace-match elem t t))))
|
|
|
|
(defun nnweb-decode-entities-string (str)
|
|
(with-temp-buffer
|
|
(insert str)
|
|
(nnweb-decode-entities)
|
|
(buffer-substring (point-min) (point-max))))
|
|
|
|
(defun nnweb-remove-markup ()
|
|
"Remove all HTML markup, leaving just plain text."
|
|
(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-insert (url &optional follow-refresh)
|
|
"Insert the contents from an URL in the current buffer.
|
|
If FOLLOW-REFRESH is non-nil, redirect refresh url in META."
|
|
(let ((name buffer-file-name))
|
|
(if follow-refresh
|
|
(save-restriction
|
|
(narrow-to-region (point) (point))
|
|
(url-insert-file-contents url)
|
|
(goto-char (point-min))
|
|
(when (re-search-forward
|
|
"<meta[ \t\r\n]*http-equiv=\"Refresh\"[^>]*URL=\\([^\"]+\\)\"" nil t)
|
|
(let ((url (match-string 1)))
|
|
(delete-region (point-min) (point-max))
|
|
(nnweb-insert url t))))
|
|
(url-insert-file-contents url))
|
|
(setq buffer-file-name name)))
|
|
|
|
(defun nnweb-parse-find (type parse &optional maxdepth)
|
|
"Find the element of TYPE in PARSE."
|
|
(catch 'found
|
|
(nnweb-parse-find-1 type parse maxdepth)))
|
|
|
|
(defun nnweb-parse-find-1 (type contents maxdepth)
|
|
(when (or (null maxdepth)
|
|
(not (zerop maxdepth)))
|
|
(when (consp contents)
|
|
(when (eq (car contents) type)
|
|
(throw 'found contents))
|
|
(when (listp (cdr contents))
|
|
(dolist (element contents)
|
|
(when (consp element)
|
|
(nnweb-parse-find-1 type element
|
|
(and maxdepth (1- maxdepth)))))))))
|
|
|
|
(defun nnweb-parse-find-all (type parse)
|
|
"Find all elements of TYPE in PARSE."
|
|
(catch 'found
|
|
(nnweb-parse-find-all-1 type parse)))
|
|
|
|
(defun nnweb-parse-find-all-1 (type contents)
|
|
(let (result)
|
|
(when (consp contents)
|
|
(if (eq (car contents) type)
|
|
(push contents result)
|
|
(when (listp (cdr contents))
|
|
(dolist (element contents)
|
|
(when (consp element)
|
|
(setq result
|
|
(nconc result (nnweb-parse-find-all-1 type element))))))))
|
|
result))
|
|
|
|
(defvar nnweb-text)
|
|
(defun nnweb-text (parse)
|
|
"Return a list of text contents in PARSE."
|
|
(let ((nnweb-text nil))
|
|
(nnweb-text-1 parse)
|
|
(nreverse nnweb-text)))
|
|
|
|
(defun nnweb-text-1 (contents)
|
|
(dolist (element contents)
|
|
(if (stringp element)
|
|
(push element nnweb-text)
|
|
(when (and (consp element)
|
|
(listp (cdr element)))
|
|
(nnweb-text-1 element)))))
|
|
|
|
(provide 'nnweb)
|
|
|
|
;;; nnweb.el ends here
|