1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
;;; muse-http.el --- publish HTML files over HTTP
;; Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
;; Free Software Foundation, Inc.
;; This file is part of Emacs Muse. It is not part of GNU Emacs.
;; Emacs Muse 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, or (at your
;; option) any later version.
;; Emacs Muse 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 Emacs Muse; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Contributors:
;;; Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Publishing HTML over HTTP (using httpd.el)
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'muse-html)
(require 'muse-project)
(require 'httpd)
(require 'cgi)
(defgroup muse-http nil
"Options controlling the behavior of Emacs Muse over HTTP."
:group 'press)
(defcustom muse-http-maintainer (concat "webmaster@" (system-name))
"The maintainer address to use for the HTTP 'From' field."
:type 'string
:group 'muse-http)
(defcustom muse-http-publishing-style "html"
"The style to use when publishing projects over http."
:type 'string
:group 'muse-http)
(defcustom muse-http-max-cache-size 64
"The number of pages to cache when serving over HTTP.
This only applies if set while running the persisted invocation
server. See main documentation for the `muse-http'
customization group."
:type 'integer
:group 'muse-http)
(defvar muse-buffer-mtime nil)
(make-variable-buffer-local 'muse-buffer-mtime)
(defun muse-sort-buffers (l r)
(let ((l-mtime (with-current-buffer l muse-buffer-mtime))
(r-mtime (with-current-buffer r muse-buffer-mtime)))
(cond
((and (null l-mtime) (null r-mtime)) l)
((null l-mtime) r)
((null r-mtime) l)
(t (muse-time-less-p r-mtime l-mtime)))))
(defun muse-winnow-list (entries &optional predicate)
"Return only those ENTRIES for which PREDICATE returns non-nil."
(let ((flist (list t)))
(let ((entry entries))
(while entry
(if (funcall predicate (car entry))
(nconc flist (list (car entry))))
(setq entry (cdr entry))))
(cdr flist)))
(defun muse-http-prune-cache ()
"If the page cache has become too large, prune it."
(let* ((buflist
(sort (muse-winnow-list (buffer-list)
(function
(lambda (buf)
(with-current-buffer buf
muse-buffer-mtime))))
'muse-sort-buffers))
(len (length buflist)))
(while (> len muse-http-max-cache-size)
(kill-buffer (car buflist))
(setq len (1- len)))))
(defvar muse-http-serving-p nil)
(defun muse-http-send-buffer (&optional modified code msg)
"Markup and send the contents of the current buffer via HTTP."
(httpd-send (or code 200) (or msg "OK")
"Server: muse.el/" muse-version httpd-endl
"Connection: close" httpd-endl
"MIME-Version: 1.0" httpd-endl
"Date: " (format-time-string "%a, %e %b %Y %T %Z")
httpd-endl
"From: " muse-http-maintainer httpd-endl)
(when modified
(httpd-send-data "Last-Modified: "
(format-time-string "%a, %e %b %Y %T %Z" modified)
httpd-endl))
(httpd-send-data "Content-Type: text/html; charset=iso-8859-1" httpd-endl
"Content-Length: " (number-to-string (1- (point-max)))
httpd-endl httpd-endl
(buffer-string))
(httpd-send-eof))
(defun muse-http-reject (title msg &optional annotation)
(muse-with-temp-buffer
(insert msg ".\n")
(if annotation
(insert annotation "\n"))
(muse-publish-markup-buffer title muse-http-publishing-style)
(muse-http-send-buffer nil 404 msg)))
(defun muse-http-prepare-url (target explicit)
(save-match-data
(unless (or (not explicit)
(string-match muse-url-regexp target)
(string-match muse-image-regexp target)
(string-match muse-file-regexp target))
(setq target (concat "page?" target
"&project=" muse-http-serving-p))))
(muse-publish-read-only target))
(defun muse-http-render-page (name)
"Render the Muse page identified by NAME.
When serving from a dedicated Emacs process (see the httpd-serve
script), a maximum of `muse-http-max-cache-size' pages will be
cached in memory to speed up serving time."
(let ((file (muse-project-page-file name muse-http-serving-p))
(muse-publish-url-transforms
(cons 'muse-http-prepare-url muse-publish-url-transforms))
(inhibit-read-only t))
(when file
(with-current-buffer (get-buffer-create file)
(let ((modified-time (nth 5 (file-attributes file)))
(muse-publishing-current-file file)
muse-publishing-current-style)
(when (or (null muse-buffer-mtime)
(muse-time-less-p muse-buffer-mtime modified-time))
(erase-buffer)
(setq muse-buffer-mtime modified-time))
(goto-char (point-max))
(when (bobp)
(muse-insert-file-contents file t)
(let ((styles (cddr (muse-project muse-http-serving-p)))
style)
(while (and styles (null style))
(let ((include-regexp
(muse-style-element :include (car styles)))
(exclude-regexp
(muse-style-element :exclude (car styles))))
(when (and (or (and (null include-regexp)
(null exclude-regexp))
(if include-regexp
(string-match include-regexp file)
(not (string-match exclude-regexp file))))
(not (muse-project-private-p file)))
(setq style (car styles))
(while (muse-style-element :base style)
(setq style
(muse-style (muse-style-element :base style))))
(if (string= (car style) muse-http-publishing-style)
(setq style (car styles))
(setq style nil))))
(setq styles (cdr styles)))
(muse-publish-markup-buffer
name (or style muse-http-publishing-style))))
(set-buffer-modified-p nil)
(muse-http-prune-cache)
(current-buffer))))))
(defun muse-http-transmit-page (name)
"Render the Muse page identified by NAME.
When serving from a dedicated Emacs process (see the httpd-serve
script), a maximum of `muse-http-max-cache-size' pages will be
cached in memory to speed up serving time."
(let ((inhibit-read-only t)
(buffer (muse-http-render-page name)))
(if buffer
(with-current-buffer buffer
(muse-http-send-buffer muse-buffer-mtime)))))
(defvar httpd-vars nil)
(defsubst httpd-var (var)
"Return value of VAR as a URL variable. If VAR doesn't exist, nil."
(cdr (assoc var httpd-vars)))
(defsubst httpd-var-p (var)
"Return non-nil if VAR was passed as a URL variable."
(not (null (assoc var httpd-vars))))
(defun muse-http-serve (page &optional content)
"Serve the given PAGE from this press server."
;; index.html is really a reference to the project home page
(if (and muse-project-alist
(string-match "\\`index.html?\\'" page))
(setq page (concat "page?"
(muse-get-keyword :default
(cadr (car muse-project-alist))))))
;; handle the actual request
(let ((vc-follow-symlinks t)
(muse-publish-report-threshhold nil)
muse-http-serving-p
httpd-vars)
(save-excursion
;; process any CGI variables, if cgi.el is available
(if (string-match "\\`\\([^&]+\\)&" page)
(setq httpd-vars (cgi-decode (substring page (match-end 0)))
page (match-string 1 page)))
(unless (setq muse-http-serving-p (httpd-var "project"))
(let ((project (car muse-project-alist)))
(setq muse-http-serving-p (car project))
(setq httpd-vars (cons (cons "project" (car project))
httpd-vars))))
(if (and muse-http-serving-p
(string-match "\\`page\\?\\(.+\\)" page))
(muse-http-transmit-page (match-string 1 page))))))
(if (featurep 'httpd)
(httpd-add-handler "\\`\\(index\\.html?\\|page\\(\\?\\|\\'\\)\\)"
'muse-http-serve))
(provide 'muse-http)
;;; muse-http.el ends here
|
