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;;; url-cookie.el --- URL cookie support
;; Copyright (C) 1996-1999, 2004-2015 Free Software Foundation, Inc.
;; Keywords: comm, data, processes, hypermedia
;; This file is part of GNU Emacs.
;; GNU Emacs 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 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <>.
;;; Commentary:
;;; Code:
(require 'url-util)
(require 'url-parse)
(require 'url-domsuf)
(eval-when-compile (require 'cl-lib))
(defgroup url-cookie nil
"URL cookies."
:prefix "url-"
:prefix "url-cookie-"
:group 'url)
;; A cookie is stored internally as a vector of 7 slots
(cl-defstruct (url-cookie
(:constructor url-cookie-create)
(:copier nil)
(:type vector)
name value expires localpart domain secure)
(defvar url-cookie-storage nil "Where cookies are stored.")
(defvar url-cookie-secure-storage nil "Where secure cookies are stored.")
(defcustom url-cookie-file nil
"File where cookies are stored on disk."
:type '(choice (const :tag "Default" :value nil) file)
:group 'url-file
:group 'url-cookie)
(defcustom url-cookie-confirmation nil
"If non-nil, confirmation by the user is required to accept HTTP cookies."
:type 'boolean
:group 'url-cookie)
(defcustom url-cookie-multiple-line nil
"If nil, HTTP requests put all cookies for the server on one line.
Some web servers, such as, only accept cookies
when they are on one line. This is broken behavior, but just try
telling Microsoft that."
:type 'boolean
:group 'url-cookie)
(defvar url-cookies-changed-since-last-save nil
"Whether the cookies list has changed since the last save operation.")
(defun url-cookie-parse-file (&optional fname)
"Load FNAME, default `url-cookie-file'."
;; It's completely normal for the cookies file not to exist yet.
(load (or fname url-cookie-file) t t))
(defun url-cookie-clean-up (&optional secure)
(let ((var (if secure 'url-cookie-secure-storage 'url-cookie-storage))
new new-cookies)
(dolist (cur (symbol-value var))
(setq new-cookies nil)
(dolist (cur-cookie (cdr cur))
(or (not (url-cookie-p cur-cookie))
(url-cookie-expired-p cur-cookie)
(null (url-cookie-expires cur-cookie))
(setq new-cookies (cons cur-cookie new-cookies))))
(when new-cookies
(setcdr cur new-cookies)
(setq new (cons cur new))))
(set var new)))
(defun url-cookie-write-file (&optional fname)
(when url-cookies-changed-since-last-save
(or fname (setq fname (expand-file-name url-cookie-file)))
(if (condition-case nil
(url-make-private-file fname)
(error t))
(message "Error accessing cookie file `%s'" fname)
(url-cookie-clean-up t)
(insert ";; Emacs-W3 HTTP cookies file\n"
";; Automatically generated file!!! DO NOT EDIT!!!\n\n"
"(setq url-cookie-storage\n '")
(pp url-cookie-storage (current-buffer))
(insert ")\n(setq url-cookie-secure-storage\n '")
(pp url-cookie-secure-storage (current-buffer))
(insert ")\n")
(insert " \n;; Local Variables:\n"
";; version-control: never\n"
";; no-byte-compile: t\n"
";; End:\n")
(set (make-local-variable 'version-control) 'never)
(write-file fname))
(setq url-cookies-changed-since-last-save nil))))
(defun url-cookie-store (name value &optional expires domain localpart secure)
"Store a cookie."
(let ((storage (if secure url-cookie-secure-storage url-cookie-storage))
tmp found-domain)
;; First, look for a matching domain.
(if (setq found-domain (assoc domain storage))
;; Need to either stick the new cookie in existing domain storage
;; or possibly replace an existing cookie if the names match.
(unless (dolist (cur (setq storage (cdr found-domain)) tmp)
(and (equal localpart (url-cookie-localpart cur))
(equal name (url-cookie-name cur))
(setf (url-cookie-expires cur) expires)
(setf (url-cookie-value cur) value)
(setq tmp t))))
;; New cookie.
(setcdr found-domain (cons
(url-cookie-create :name name
:value value
:expires expires
:domain domain
:localpart localpart
:secure secure)
(cdr found-domain))))
;; Need to add a new top-level domain.
(setq tmp (url-cookie-create :name name
:value value
:expires expires
:domain domain
:localpart localpart
:secure secure))
(cond (storage
(setcdr storage (cons (list domain tmp) (cdr storage))))
(setq url-cookie-secure-storage (list (list domain tmp))))
(setq url-cookie-storage (list (list domain tmp))))))))
(defun url-cookie-expired-p (cookie)
"Return non-nil if COOKIE is expired."
(let ((exp (url-cookie-expires cookie)))
(and (> (length exp) 0)
(> (float-time) (float-time (date-to-time exp))))))
(defun url-cookie-retrieve (host &optional localpart secure)
"Retrieve all cookies for a specified HOST and LOCALPART."
(let ((storage (if secure
(append url-cookie-secure-storage url-cookie-storage)
(case-fold-search t)
cookies retval localpart-match)
(dolist (cur storage)
(setq cookies (cdr cur))
(if (and (car cur)
(concat "^.*"
;; Remove the dot from wildcard domains
;; before matching.
(if (eq ?. (aref (car cur) 0))
(substring (car cur) 1)
(car cur)))
"$") host))
;; The domains match - a possible hit!
(dolist (cur cookies)
(and (if (and (stringp
(setq localpart-match (url-cookie-localpart cur)))
(stringp localpart))
(string-match (concat "^" (regexp-quote localpart-match))
(equal localpart localpart-match))
(not (url-cookie-expired-p cur))
(setq retval (cons cur retval))))))
(defun url-cookie-generate-header-lines (host localpart secure)
(let ((cookies (url-cookie-retrieve host localpart secure))
retval chunk)
;; Have to sort this for sending most specific cookies first.
(setq cookies (and cookies
(sort cookies
(lambda (x y)
(> (length (url-cookie-localpart x))
(length (url-cookie-localpart y)))))))
(dolist (cur cookies)
(setq chunk (format "%s=%s" (url-cookie-name cur) (url-cookie-value cur))
retval (if (and url-cookie-multiple-line
(< 80 (+ (length retval) (length chunk) 4)))
(concat retval "\r\nCookie: " chunk)
(if retval
(concat retval "; " chunk)
(concat "Cookie: " chunk)))))
(if retval
(concat retval "\r\n")
(defcustom url-cookie-trusted-urls nil
"A list of regular expressions matching URLs to always accept cookies from."
:type '(repeat regexp)
:group 'url-cookie)
(defcustom url-cookie-untrusted-urls nil
"A list of regular expressions matching URLs to never accept cookies from."
:type '(repeat regexp)
:group 'url-cookie)
(defun url-cookie-host-can-set-p (host domain)
(let ((last nil)
(case-fold-search t))
(if (string= host domain) ; Apparently netscape lets you do this
;; Remove the dot from wildcard domains before matching.
(when (eq ?. (aref domain 0))
(setq domain (substring domain 1)))
(and (url-domsuf-cookie-allowed-p domain)
;; Need to check and make sure the host is actually _in_ the
;; domain it wants to set a cookie for though.
(string-match (concat (regexp-quote domain)
"$") host)))))
(defun url-cookie-handle-set-cookie (str)
(setq url-cookies-changed-since-last-save t)
(let* ((args (url-parse-args str t))
(case-fold-search t)
(secure (and (assoc-string "secure" args t) t))
(domain (or (cdr-safe (assoc-string "domain" args t))
(url-host url-current-object)))
(current-url (url-view-url t))
(trusted url-cookie-trusted-urls)
(untrusted url-cookie-untrusted-urls)
(expires (cdr-safe (assoc-string "expires" args t)))
(localpart (or (cdr-safe (assoc-string "path" args t))
(url-filename url-current-object))))
(rest nil))
(dolist (this args)
(or (member (downcase (car this)) '("secure" "domain" "expires" "path"))
(setq rest (cons this rest))))
;; Sometimes we get dates that the timezone package cannot handle very
;; gracefully - take care of this here, instead of in url-cookie-expired-p
;; to speed things up.
(and expires
(concat "^[^,]+, +\\(..\\)-\\(...\\)-\\(..\\) +"
"\\(..:..:..\\) +\\[*\\([^\]]+\\)\\]*$")
(setq expires (concat (match-string 1 expires) " "
(match-string 2 expires) " "
(match-string 3 expires) " "
(match-string 4 expires) " ["
(match-string 5 expires) "]")))
;; This one is for older Emacs/XEmacs variants that don't
;; understand this format without tenths of a second in it.
;; Wednesday, 30-Dec-2037 16:00:00 GMT
;; - vs -
;; Wednesday, 30-Dec-2037 16:00:00.00 GMT
(and expires
"\\([0-9]+\\)-\\([A-Za-z]+\\)-\\([0-9]+\\)[ \t]+\\([0-9]+:[0-9]+:[0-9]+\\)\\(\\.[0-9]+\\)*[ \t]+\\([-+a-zA-Z0-9]+\\)"
(setq expires (concat (match-string 1 expires) "-" ; day
(match-string 2 expires) "-" ; month
(match-string 3 expires) " " ; year
(match-string 4 expires) ".00 " ; hour:minutes:seconds
(match-string 6 expires)))) ":" ; timezone
(while (consp trusted)
(if (string-match (car trusted) current-url)
(setq trusted (- (match-end 0) (match-beginning 0)))
(pop trusted)))
(while (consp untrusted)
(if (string-match (car untrusted) current-url)
(setq untrusted (- (match-end 0) (match-beginning 0)))
(pop untrusted)))
(and trusted untrusted
;; Choose the more specific match.
(set (if (> trusted untrusted) 'untrusted 'trusted) nil))
;; The site was explicitly marked as untrusted by the user.
((or (eq url-privacy-level 'paranoid)
(and (listp url-privacy-level) (memq 'cookies url-privacy-level)))
;; User never wants cookies.
((and url-cookie-confirmation
(not trusted)
(with-output-to-temp-buffer "*Cookie Warning*"
(dolist (x rest)
(princ (format "%s - %s" (car x) (cdr x)))))
(not (funcall url-confirmation-func
(format "Allow %s to set these cookies? "
(url-host url-current-object))))
(if (get-buffer "*Cookie Warning*")
(kill-buffer "*Cookie Warning*")))))
;; User wants to be asked, and declined.
((url-cookie-host-can-set-p (url-host url-current-object) domain)
;; Cookie is accepted by the user, and passes our security checks.
(dolist (cur rest)
(url-cookie-store (car cur) (cdr cur) expires domain localpart secure)))
(url-lazy-message "%s tried to set a cookie for domain %s - rejected."
(url-host url-current-object) domain)))))
(defvar url-cookie-timer nil)
(defcustom url-cookie-save-interval 3600
"The number of seconds between automatic saves of cookies.
Default is 1 hour. Note that if you change this variable outside of
the `customize' interface after `url-do-setup' has been run, you need
to run the `url-cookie-setup-save-timer' function manually."
:set #'(lambda (var val)
(set-default var val)
(if (bound-and-true-p url-setup-done)
:type 'integer
:group 'url-cookie)
(defun url-cookie-setup-save-timer ()
"Reset the cookie saver timer."
(ignore-errors (cancel-timer url-cookie-timer))
(setq url-cookie-timer nil)
(if url-cookie-save-interval
(setq url-cookie-timer (run-at-time url-cookie-save-interval
;;; Mode for listing and editing cookies.
(defun url-cookie-list ()
"Display a buffer listing the current URL cookies, if there are any.
Use \\<url-cookie-mode-map>\\\[url-cookie-delete] to remove cookies."
(when (and (null url-cookie-secure-storage)
(null url-cookie-storage))
(error "No cookies are defined"))
(pop-to-buffer "*url cookies*")
(let ((inhibit-read-only t)
(domains (sort
(append url-cookie-secure-storage
(lambda (e1 e2)
(string< (car e1) (car e2)))))
(domain-length 0)
start name format domain)
(dolist (elem domains)
(setq domain-length (max domain-length (length (car elem)))))
(setq format (format "%%-%ds %%-20s %%s" domain-length)
(concat " " (format format "Domain" "Name" "Value")))
(dolist (elem domains)
(setq domain (car elem))
(dolist (cookie (sort (copy-sequence (cdr elem))
(lambda (c1 c2)
(string< (url-cookie-name c1)
(url-cookie-name c2)))))
(setq start (point)
name (url-cookie-name cookie))
(when (> (length name) 20)
(setq name (substring name 0 20)))
(insert (format format domain name
(url-cookie-value cookie))
(setq domain "")
(put-text-property start (1+ start) 'url-cookie cookie)))
(goto-char (point-min))))
(defun url-cookie-delete ()
"Delete the cookie on the current line."
(let ((cookie (get-text-property (line-beginning-position) 'url-cookie))
(inhibit-read-only t)
(unless cookie
(error "No cookie on the current line"))
(setq variable (if (url-cookie-secure cookie)
(let* ((list (symbol-value variable))
(elem (assoc (url-cookie-domain cookie) list)))
(setq elem (delq cookie elem))
(when (zerop (length (cdr elem)))
(setq list (delq elem list)))
(set variable list))
(setq url-cookies-changed-since-last-save t)
(delete-region (line-beginning-position)
(forward-line 1)
(defun url-cookie-quit ()
"Kill the current buffer."
(kill-buffer (current-buffer)))
(defvar url-cookie-mode-map
(let ((map (make-sparse-keymap)))
(suppress-keymap map)
(define-key map "q" 'url-cookie-quit)
(define-key map [delete] 'url-cookie-delete)
(define-key map [(control k)] 'url-cookie-delete)
(define-derived-mode url-cookie-mode nil "URL Cookie"
"Mode for listing cookies.
(setq buffer-read-only t
truncate-lines t))
(provide 'url-cookie)
;;; url-cookie.el ends here
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