lisp/url/url-vars.el

   1 ;;; url-vars.el --- Variables for Uniform Resource Locator tool
   2
   3 ;; Copyright (c) 1996,1997,1998,1999,2001,2004 Free Software Foundation, Inc.
   4
   5 ;; Keywords: comm, data, processes, hypermedia
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22 ;; Boston, MA 02110-1301, USA.
  23
  24 ;;; Code:
  25
  26 (require 'mm-util)
  27
  28 (defconst url-version "Emacs"
  29   "Version number of URL package.")
  30
  31 (defgroup url nil
  32   "Uniform Resource Locator tool."
  33   :version "22.1"
  34   :group 'hypermedia)
  35
  36 (defgroup url-file nil
  37   "URL storage."
  38   :prefix "url-"
  39   :group 'url)
  40
  41 (defgroup url-cache nil
  42   "URL cache."
  43   :prefix "url-"
  44   :prefix "url-cache-"
  45   :group 'url)
  46
  47 (defgroup url-mime nil
  48   "MIME options of URL."
  49   :prefix "url-"
  50   :group 'url)
  51
  52 (defgroup url-hairy nil
  53   "Hairy options of URL."
  54   :prefix "url-"
  55   :group 'url)
  56
  57
  58 (defvar url-current-object nil
  59   "A parsed representation of the current url.")
  60
  61 (defvar url-current-mime-headers nil
  62   "A parsed representation of the MIME headers for the current url.")
  63
  64 (mapcar 'make-variable-buffer-local
  65         '(
  66           url-current-object
  67           url-current-referer
  68           url-current-mime-headers
  69           ))
  70
  71 (defcustom url-honor-refresh-requests t
  72   "*Whether to do automatic page reloads.
  73 These are done at the request of the document author or the server via
  74 the `Refresh' header in an HTTP response.  If nil, no refresh
  75 requests will be honored.  If t, all refresh requests will be honored.
  76 If non-nil and not t, the user will be asked for each refresh
  77 request."
  78   :type '(choice (const :tag "off" nil)
  79                  (const :tag "on" t)
  80                  (const :tag "ask" 'ask))
  81   :group 'url-hairy)
  82
  83 (defcustom url-automatic-caching nil
  84   "*If non-nil, all documents will be automatically cached to the local disk."
  85   :type 'boolean
  86   :group 'url-cache)
  87
  88 ;; Fixme: sanitize this.
  89 (defcustom url-cache-expired
  90   (lambda (t1 t2) (>= (- (car t2) (car t1)) 5))
  91   "*A function determining if a cached item has expired.
  92 It takes two times (numbers) as its arguments, and returns non-nil if
  93 the second time is 'too old' when compared to the first time."
  94   :type 'function
  95   :group 'url-cache)
  96
  97 (defconst url-bug-address "bug-gnu-emacs@gnu.org"
  98   "Where to send bug reports.")
  99
 100 (defcustom url-personal-mail-address nil
 101   "*Your full email address.
 102 This is what is sent to HTTP servers as the FROM field in an HTTP
 103 request."
 104   :type '(choice (const :tag "Unspecified" nil) string)
 105   :group 'url)
 106
 107 (defcustom url-directory-index-file "index.html"
 108   "*The filename to look for when indexing a directory.
 109 If this file exists, and is readable, then it will be viewed instead of
 110 using `dired' to view the directory."
 111   :type 'string
 112   :group 'url-file)
 113
 114 ;; Fixme: this should have a setter which calls url-setup-privacy-info.
 115 (defcustom url-privacy-level '(email)
 116   "*How private you want your requests to be.
 117 HTTP has header fields for various information about the user, including
 118 operating system information, email addresses, the last page you visited, etc.
 119 This variable controls how much of this information is sent.
 120
 121 This should a symbol or a list.
 122 Valid values if a symbol are:
 123 none     -- Send all information
 124 low      -- Don't send the last location
 125 high     -- Don't send the email address or last location
 126 paranoid -- Don't send anything
 127
 128 If a list, this should be a list of symbols of what NOT to send.
 129 Valid symbols are:
 130 email    -- the email address
 131 os       -- the operating system info
 132 lastloc  -- the last location
 133 agent    -- Do not send the User-Agent string
 134 cookie   -- never accept HTTP cookies
 135
 136 Samples:
 137
 138  (setq url-privacy-level 'high)
 139  (setq url-privacy-level '(email lastloc))    ;; equivalent to 'high
 140  (setq url-privacy-level '(os))
 141
 142 ::NOTE::
 143 This variable controls several other variables and is _NOT_ automatically
 144 updated.  Call the function `url-setup-privacy-info' after modifying this
 145 variable."
 146   :type '(radio (const :tag "None (you believe in the basic goodness of humanity)"
 147                        :value none)
 148                 (const :tag "Low (do not reveal last location)"
 149                        :value low)
 150                 (const :tag "High (no email address or last location)"
 151                        :value high)
 152                 (const :tag "Paranoid (reveal nothing!)"
 153                        :value paranoid)
 154                 (checklist :tag "Custom"
 155                            (const :tag "Email address" :value email)
 156                            (const :tag "Operating system" :value os)
 157                            (const :tag "Last location" :value lastloc)
 158                            (const :tag "Browser identification" :value agent)
 159                            (const :tag "No cookies" :value cookie)))
 160   :group 'url)
 161
 162 (defvar url-inhibit-uncompression nil "Do not do decompression if non-nil.")
 163
 164 (defcustom url-uncompressor-alist '((".z"  . "x-gzip")
 165                                     (".gz" . "x-gzip")
 166                                     (".uue" . "x-uuencoded")
 167                                     (".hqx" . "x-hqx")
 168                                     (".Z"  . "x-compress")
 169                                     (".bz2"  . "x-bzip2"))
 170   "*An alist of file extensions and appropriate content-transfer-encodings."
 171   :type '(repeat (cons :format "%v"
 172                        (string :tag "Extension")
 173                        (string :tag "Encoding")))
 174   :group 'url-mime)
 175
 176 (defcustom url-mail-command (if (fboundp 'compose-mail)
 177                                 'compose-mail
 178                               'url-mail)
 179   "*This function will be called whenever url needs to send mail.
 180 It should enter a mail-mode-like buffer in the current window.
 181 The commands `mail-to' and `mail-subject' should still work in this
 182 buffer, and it should use `mail-header-separator' if possible."
 183   :type 'function
 184   :group 'url)
 185
 186 (defcustom url-proxy-services nil
 187   "*An alist of schemes and proxy servers that gateway them.
 188 Looks like ((\"http\" . \"hostname:portnumber\") ...).  This is set up
 189 from the ACCESS_proxy environment variables."
 190   :type '(repeat (cons :format "%v"
 191                        (string :tag "Protocol")
 192                        (string :tag "Proxy")))
 193   :group 'url)
 194
 195 (defcustom url-standalone-mode nil
 196   "*Rely solely on the cache?"
 197   :type 'boolean
 198   :group 'url-cache)
 199
 200 (defvar url-mime-separator-chars (mapcar 'identity
 201                                         (concat "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 202                                                 "abcdefghijklmnopqrstuvwxyz"
 203                                                 "0123456789'()+_,-./=?"))
 204   "Characters allowable in a MIME multipart separator.")
 205
 206 (defcustom url-bad-port-list
 207   '("25" "119" "19")
 208   "*List of ports to warn the user about connecting to.
 209 Defaults to just the mail, chargen, and NNTP ports so you cannot be
 210 tricked into sending fake mail or forging messages by a malicious HTML
 211 document."
 212   :type '(repeat (string :tag "Port"))
 213   :group 'url-hairy)
 214
 215 (defvar url-mime-content-type-charset-regexp
 216   ";[ \t]*charset=\"?\\([^\"]+\\)\"?"
 217   "Regexp used in parsing `Content-Type' for a charset indication.")
 218
 219 (defvar url-request-data nil "Any data to send with the next request.")
 220
 221 (defvar url-request-extra-headers nil
 222   "A list of extra headers to send with the next request.
 223 Should be an assoc list of headers/contents.")
 224
 225 (defvar url-request-method nil "The method to use for the next request.")
 226
 227 ;; FIXME!!  (RFC 2616 gives examples like `compress, gzip'.)
 228 (defvar url-mime-encoding-string nil
 229   "*String to send in the Accept-encoding: field in HTTP requests.")
 230
 231 ;; Perhaps the first few should actually be given decreasing `q's and
 232 ;; the list should be trimmed significantly.
 233 ;; Fixme: do something sane if we don't have `sort-coding-systems'
 234 ;; (Emacs 20, XEmacs).
 235 (defun url-mime-charset-string ()
 236   "Generate a list of preferred MIME charsets for HTTP requests.
 237 Generated according to current coding system priorities."
 238   (if (fboundp 'sort-coding-systems)
 239       (let ((ordered (sort-coding-systems
 240                       (let (accum)
 241                         (dolist (elt mm-mime-mule-charset-alist)
 242                           (if (mm-coding-system-p (car elt))
 243                               (push (car elt) accum)))
 244                         (nreverse accum)))))
 245         (concat (format "%s;q=1, " (pop ordered))
 246                 (mapconcat 'symbol-name ordered ";q=0.5, ")
 247                 ";q=0.5"))))
 248
 249 (defvar url-mime-charset-string (url-mime-charset-string)
 250   "*String to send in the Accept-charset: field in HTTP requests.
 251 The MIME charset corresponding to the most preferred coding system is
 252 given priority 1 and the rest are given priority 0.5.")
 253
 254 (defun url-set-mime-charset-string ()
 255   (setq url-mime-charset-string (url-mime-charset-string)))
 256 ;; Regenerate if the language environment changes.
 257 (add-hook 'set-language-environment-hook 'url-set-mime-charset-string)
 258
 259 ;; Fixme: set from the locale.
 260 (defcustom url-mime-language-string nil
 261   "*String to send in the Accept-language: field in HTTP requests.
 262
 263 Specifies the preferred language when servers can serve documents in
 264 several languages.  Use RFC 1766 abbreviations, e.g.@: `en' for
 265 English, `de' for German.  A comma-separated specifies descending
 266 order of preference.  The ordering can be made explicit using `q'
 267 factors defined by HTTP, e.g. `de,en-gb;q=0.8,en;q=0.7'.  `*' means
 268 get the first available language (as opposed to the default)."
 269   :type '(radio
 270           (const :tag "None (get default language version)" :value nil)
 271           (const :tag "Any (get first available language version)" :value "*")
 272           (string :tag "Other"))
 273   :group 'url-mime
 274   :group 'i18n)
 275
 276 (defvar url-mime-accept-string nil
 277   "String to send to the server in the Accept: field in HTTP requests.")
 278
 279 (defvar url-package-version nil
 280   "Version number of package using URL.")
 281
 282 (defvar url-package-name nil "Version number of package using URL.")
 283
 284 (defvar url-system-type nil
 285   "What type of system we are on.")
 286 (defvar url-os-type nil
 287   "What OS we are on.")
 288
 289 (defcustom url-max-password-attempts 5
 290   "*Maximum number of times a password will be prompted for.
 291 Applies when a protected document is denied by the server."
 292   :type 'integer
 293   :group 'url)
 294
 295 (defcustom url-temporary-directory (or (getenv "TMPDIR") "/tmp")
 296   "*Where temporary files go."
 297   :type 'directory
 298   :group 'url-file)
 299
 300 (defcustom url-show-status t
 301   "*Whether to show a running total of bytes transferred.
 302 Can cause a large hit if using a remote X display over a slow link, or
 303 a terminal with a slow modem."
 304   :type 'boolean
 305   :group 'url)
 306
 307 (defvar url-using-proxy nil
 308   "Either nil or the fully qualified proxy URL in use, e.g.
 309 http://www.domain.com/")
 310
 311 (defcustom url-news-server nil
 312   "*The default news server from which to get newsgroups/articles.
 313 Applies if no server is specified in the URL.  Defaults to the
 314 environment variable NNTPSERVER or \"news\" if NNTPSERVER is
 315 undefined."
 316   :type '(choice (const :tag "None" :value nil) string)
 317   :group 'url)
 318
 319 (defvar url-nonrelative-link
 320   "\\`\\([-a-zA-Z0-9+.]+:\\)"
 321   "A regular expression that will match an absolute URL.")
 322
 323 (defcustom url-confirmation-func 'y-or-n-p
 324   "*What function to use for asking yes or no functions.
 325 Possible values are `yes-or-no-p' or `y-or-n-p', or any function that
 326 takes a single argument (the prompt), and returns t only if a positive
 327 answer is given."
 328   :type '(choice (const :tag "Short (y or n)" :value y-or-n-p)
 329                  (const :tag "Long (yes or no)" :value yes-or-no-p)
 330                  (function :tag "Other"))
 331   :group 'url-hairy)
 332
 333 (defcustom url-gateway-method 'native
 334   "*The type of gateway support to use.
 335 Should be a symbol specifying how to get a connection from the local machine.
 336
 337 Currently supported methods:
 338 `telnet': Run telnet in a subprocess to connect;
 339 `rlogin': Rlogin to another machine to connect;
 340 `socks': Connect through a socks server;
 341 `tls': Connect with TLS;
 342 `ssl': Connect with SSL (deprecated, use `tls' instead);
 343 `native': Connect directy."
 344   :type '(radio (const :tag "Telnet to gateway host" :value telnet)
 345                 (const :tag "Rlogin to gateway host" :value rlogin)
 346                 (const :tag "Use SOCKS proxy" :value socks)
 347                 (const :tag "Use SSL/TLS for all connections" :value tls)
 348                 (const :tag "Use SSL for all connections (obsolete)" :value ssl)
 349                 (const :tag "Direct connection" :value native))
 350   :group 'url-hairy)
 351
 352 (defvar url-setup-done nil "Has setup configuration been done?")
 353
 354 (defconst url-weekday-alist
 355   '(("Sunday" . 0) ("Monday" . 1) ("Tuesday" . 2) ("Wednesday" . 3)
 356     ("Thursday" . 4) ("Friday" . 5) ("Saturday" . 6)
 357     ("Tues" . 2) ("Thurs" . 4)
 358     ("Sun" . 0) ("Mon" . 1) ("Tue" . 2) ("Wed" . 3)
 359     ("Thu" . 4) ("Fri" . 5) ("Sat" . 6)))
 360
 361 (defconst url-monthabbrev-alist
 362   '(("Jan" . 1) ("Feb" . 2) ("Mar" . 3) ("Apr" . 4) ("May" . 5) ("Jun" . 6)
 363     ("Jul" . 7) ("Aug" . 8) ("Sep" . 9) ("Oct" . 10) ("Nov" . 11)
 364     ("Dec" . 12)))
 365
 366 (defvar url-lazy-message-time 0)
 367
 368 ;; Fixme: We may not be able to run SSL.
 369 (defvar url-extensions-header "Security/Digest Security/SSL")
 370
 371 (defvar url-parse-syntax-table
 372   (copy-syntax-table emacs-lisp-mode-syntax-table)
 373   "*A syntax table for parsing URLs.")
 374
 375 (modify-syntax-entry ?' "\"" url-parse-syntax-table)
 376 (modify-syntax-entry ?` "\"" url-parse-syntax-table)
 377 (modify-syntax-entry ?< "(>" url-parse-syntax-table)
 378 (modify-syntax-entry ?> ")<" url-parse-syntax-table)
 379 (modify-syntax-entry ?/ " " url-parse-syntax-table)
 380
 381 (defvar url-load-hook nil
 382   "*Hooks to be run after initalizing the URL library.")
 383
 384 ;;; Make OS/2 happy - yeeks
 385 ;; (defvar      tcp-binary-process-input-services nil
 386 ;;   "*Make OS/2 happy with our CRLF pairs...")
 387
 388 (defconst url-working-buffer " *url-work")
 389
 390 (defvar url-gateway-unplugged nil
 391   "Non-nil means don't open new network connections.
 392 This should be set, e.g. by mail user agents rendering HTML to avoid
 393 `bugs' which call home.")
 394
 395 (defun url-vars-unload-hook ()
 396   (remove-hook 'set-language-environment-hook 'url-set-mime-charset-string))
 397
 398 (add-hook 'url-vars-unload-hook 'url-vars-unload-hook)
 399
 400 (provide 'url-vars)
 401
 402 ;;; arch-tag: 29205e5f-c5ce-433c-8d5d-38cbaed64b49
 403 ;;; url-vars.el ends here