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;;; url-parse.el --- Uniform Resource Locator parser
;; Copyright (C) 1996, 1997, 1998, 1999, 2004,
;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
;; Keywords: comm, data, processes
;; 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
;; 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'url-vars)
(eval-when-compile (require 'cl))
(autoload 'url-scheme-get-property "url-methods")
(defstruct (url
(:constructor nil)
(:constructor url-parse-make-urlobj
(&optional type user password host portspec filename
target attributes fullness))
(:copier nil))
type user password host portspec filename target attributes fullness)
(defsubst url-port (urlobj)
(or (url-portspec urlobj)
(if (url-fullness urlobj)
(url-scheme-get-property (url-type urlobj) 'default-port))))
(defsetf url-port (urlobj) (port) `(setf (url-portspec ,urlobj) ,port))
;;;###autoload
(defun url-recreate-url (urlobj)
"Recreate a URL string from the parsed URLOBJ."
(concat (url-type urlobj) ":" (if (url-host urlobj) "//" "")
(if (url-user urlobj)
(concat (url-user urlobj)
(if (url-password urlobj)
(concat ":" (url-password urlobj)))
"@"))
(url-host urlobj)
(if (and (url-port urlobj)
(not (equal (url-port urlobj)
(url-scheme-get-property (url-type urlobj) 'default-port))))
(format ":%d" (url-port urlobj)))
(or (url-filename urlobj) "/")
(url-recreate-url-attributes urlobj)
(if (url-target urlobj)
(concat "#" (url-target urlobj)))))
(defun url-recreate-url-attributes (urlobj)
"Recreate the attributes of an URL string from the parsed URLOBJ."
(when (url-attributes urlobj)
(concat ";"
(mapconcat (lambda (x)
(if (cdr x)
(concat (car x) "=" (cdr x))
(car x)))
(url-attributes urlobj) ";"))))
;;;###autoload
(defun url-generic-parse-url (url)
"Return an URL-struct of the parts of URL.
The CL-style struct contains the following fields:
TYPE USER PASSWORD HOST PORTSPEC FILENAME TARGET ATTRIBUTES FULLNESS."
;; See RFC 3986.
(cond
((null url)
(url-parse-make-urlobj))
((or (not (string-match url-nonrelative-link url))
(= ?/ (string-to-char url)))
;; This isn't correct, as a relative URL can be a fragment link
;; (e.g. "#foo") and many other things (see section 4.2).
;; However, let's not fix something that isn't broken, especially
;; when close to a release.
(url-parse-make-urlobj nil nil nil nil nil url))
(t
(with-temp-buffer
;; Don't let those temp-buffer modifications accidentally
;; deactivate the mark of the current-buffer.
(let ((deactivate-mark nil))
(set-syntax-table url-parse-syntax-table)
(let ((save-pos nil)
(prot nil)
(user nil)
(pass nil)
(host nil)
(port nil)
(file nil)
(refs nil)
(attr nil)
(full nil)
(inhibit-read-only t))
(erase-buffer)
(insert url)
(goto-char (point-min))
(setq save-pos (point))
;; 3.1. Scheme
(unless (looking-at "//")
(skip-chars-forward "a-zA-Z+.\\-")
(downcase-region save-pos (point))
(setq prot (buffer-substring save-pos (point)))
(skip-chars-forward ":")
(setq save-pos (point)))
;; 3.2. Authority
(when (looking-at "//")
(setq full t)
(forward-char 2)
(setq save-pos (point))
(skip-chars-forward "^/")
(setq host (buffer-substring save-pos (point)))
(if (string-match "^\\([^@]+\\)@" host)
(setq user (match-string 1 host)
host (substring host (match-end 0) nil)))
(if (and user (string-match "\\([^:]+\\):\\(.*\\)" user))
(setq pass (match-string 2 user)
user (match-string 1 user)))
;; This gives wrong results for IPv6 literal addresses.
(if (string-match ":\\([0-9+]+\\)" host)
(setq port (string-to-number (match-string 1 host))
host (substring host 0 (match-beginning 0))))
(if (string-match ":$" host)
(setq host (substring host 0 (match-beginning 0))))
(setq host (downcase host)
save-pos (point)))
(if (not port)
(setq port (url-scheme-get-property prot 'default-port)))
;; 3.3. Path
;; Gross hack to preserve ';' in data URLs
(setq save-pos (point))
;; 3.4. Query
(if (string= "data" prot)
(goto-char (point-max))
;; Now check for references
(skip-chars-forward "^#")
(if (eobp)
nil
(delete-region
(point)
(progn
(skip-chars-forward "#")
(setq refs (buffer-substring (point) (point-max)))
(point-max))))
(goto-char save-pos)
(skip-chars-forward "^;")
(unless (eobp)
(setq attr (url-parse-args (buffer-substring (point) (point-max))
t)
attr (nreverse attr))))
(setq file (buffer-substring save-pos (point)))
(if (and host (string-match "%[0-9][0-9]" host))
(setq host (url-unhex-string host)))
(url-parse-make-urlobj
prot user pass host port file refs attr full)))))))
(provide 'url-parse)
;; arch-tag: f338325f-71ab-4bee-93cc-78fb9a03d403
;;; url-parse.el ends here
|
