1 files changed, 269 insertions, 0 deletions
diff --git a/lisp/url/url.el b/lisp/url/url.el
new file mode 100644
index 00000000000..22d5aa59997
--- /dev/null
+++ b/lisp/url/url.el
@@ -0,0 +1,269 @@
+;;; url.el --- Uniform Resource Locator retrieval tool
+;; Author: Bill Perry <wmperry@gnu.org>
+;; Version: $Revision: 1.15 $
+;; Keywords: comm, data, processes, hypermedia
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Copyright (c) 1993 - 1996 by William M. Perry <wmperry@cs.indiana.edu>
+;;; Copyright (c) 1996, 97, 98, 99, 2001 Free Software Foundation, Inc.
+;;;
+;;; 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 2, 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; see the file COPYING.  If not, write to the
+;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;;; Boston, MA 02111-1307, USA.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; Registered URI schemes: http://www.iana.org/assignments/uri-schemes
+
+(eval-when-compile (require 'cl))
+;; Don't require CL at runtime if we can avoid it (Emacs 21).
+;; Otherwise we need it for hashing functions.  `puthash' was never
+;; defined in the Emacs 20 cl.el for some reason.
+(if (fboundp 'puthash)
+    nil					; internal or CL is loaded
+  (defalias 'puthash 'cl-puthash)
+  (autoload 'cl-puthash "cl")
+  (autoload 'gethash "cl")
+  (autoload 'maphash "cl")
+  (autoload 'make-hash-table "cl"))
+
+(eval-when-compile
+  (require 'mm-decode)
+  (require 'mm-view))
+
+(require 'mailcap)
+(require 'url-vars)
+(require 'url-cookie)
+(require 'url-history)
+(require 'url-expand)
+(require 'url-privacy)
+(require 'url-methods)
+(require 'url-proxy)
+(require 'url-parse)
+(require 'url-util)
+
+;; Fixme: customize? convert-standard-filename? 
+;;;###autoload
+(defvar url-configuration-directory "~/.url")
+
+(defun url-do-setup ()
+  "Setup the url package.
+This is to avoid conflict with user settings if URL is dumped with
+Emacs."
+  (unless url-setup-done
+
+    ;; Make OS/2 happy
+    ;;(push '("http" "80") tcp-binary-process-input-services)
+
+    (mailcap-parse-mailcaps)
+    (mailcap-parse-mimetypes)
+    
+    ;; Register all the authentication schemes we can handle
+    (url-register-auth-scheme "basic" nil 4)
+    (url-register-auth-scheme "digest" nil 7)
+
+    (setq url-cookie-file
+	  (or url-cookie-file
+	      (expand-file-name "cookies" url-configuration-directory)))
+    
+    (setq url-history-file
+	  (or url-history-file
+	      (expand-file-name "history" url-configuration-directory)))
+  
+    ;; Parse the global history file if it exists, so that it can be used
+    ;; for URL completion, etc.
+    (url-history-parse-history)
+    (url-history-setup-save-timer)
+
+    ;; Ditto for cookies
+    (url-cookie-setup-save-timer)
+    (url-cookie-parse-file url-cookie-file)
+
+    ;; Read in proxy gateways
+    (let ((noproxy (and (not (assoc "no_proxy" url-proxy-services))
+			(or (getenv "NO_PROXY")
+			    (getenv "no_PROXY")
+			    (getenv "no_proxy")))))
+      (if noproxy
+	  (setq url-proxy-services
+		(cons (cons "no_proxy"
+			    (concat "\\("
+				    (mapconcat
+				     (lambda (x)
+				       (cond
+					((= x ?,) "\\|")
+					((= x ? ) "")
+					((= x ?.) (regexp-quote "."))
+					((= x ?*) ".*")
+					((= x ??) ".")
+					(t (char-to-string x))))
+				     noproxy "") "\\)"))
+		      url-proxy-services))))
+
+    ;; Set the password entry funtion based on user defaults or guess
+    ;; based on which remote-file-access package they are using.
+    (cond
+     (url-passwd-entry-func nil)	; Already been set
+     ((fboundp 'read-passwd)		; Use secure password if available
+      (setq url-passwd-entry-func 'read-passwd))
+     ((or (featurep 'efs)		; Using EFS
+	  (featurep 'efs-auto))		; or autoloading efs
+      (if (not (fboundp 'read-passwd))
+	  (autoload 'read-passwd "passwd" "Read in a password" nil))
+      (setq url-passwd-entry-func 'read-passwd))
+     ((or (featurep 'ange-ftp)		; Using ange-ftp
+	  (and (boundp 'file-name-handler-alist)
+	       (not (featurep 'xemacs)))) ; ??
+      (setq url-passwd-entry-func 'ange-ftp-read-passwd))
+     (t
+      (url-warn
+       'security
+       "(url-setup): Can't determine how to read passwords, winging it.")))
+  
+    (url-setup-privacy-info)
+    (run-hooks 'url-load-hook)
+    (setq url-setup-done t)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Retrieval functions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(defun url-retrieve (url callback &optional cbargs)
+  "Retrieve URL asynchronously and call CALLBACK with CBARGS when finished.
+The callback is called when the object has been completely retrieved, with
+the current buffer containing the object, and any MIME headers associated
+with it.  URL is either a string or a parsed URL.
+
+Return the buffer URL will load into, or nil if the process has
+already completed."
+  (url-do-setup)
+  (url-gc-dead-buffers)
+  (if (stringp url)
+       (set-text-properties 0 (length url) nil url))
+  (if (not (vectorp url))
+      (setq url (url-generic-parse-url url)))
+  (if (not (functionp callback))
+      (error "Must provide a callback function to url-retrieve"))
+  (unless (url-type url)
+    (error "Bad url: %s" (url-recreate-url url)))
+  (let ((loader (url-scheme-get-property (url-type url) 'loader))
+	(url-using-proxy (if (url-host url)
+			     (url-find-proxy-for-url url (url-host url))))
+	(buffer nil)
+	(asynch (url-scheme-get-property (url-type url) 'asynchronous-p)))
+    (if url-using-proxy
+	(setq asynch t
+	      loader 'url-proxy))
+    (if asynch
+	(setq buffer (funcall loader url callback cbargs))
+      (setq buffer (funcall loader url))
+      (if buffer
+	  (save-excursion
+	    (set-buffer buffer)
+	    (apply callback cbargs))))
+    (url-history-update-url url (current-time))
+    buffer))
+
+(defun url-retrieve-synchronously (url)
+  "Retrieve URL synchronously.
+Return the buffer containing the data, or nil if there are no data
+associated with it (the case for dired, info, or mailto URLs that need
+no further processing).  URL is either a string or a parsed URL."
+  (url-do-setup)
+
+  (lexical-let ((retrieval-done nil)
+		(asynch-buffer nil))
+    (setq asynch-buffer
+	  (url-retrieve url (lambda (&rest ignored)
+			      (url-debug 'retrieval "Synchronous fetching done (%S)" (current-buffer))
+			      (setq retrieval-done t
+				    asynch-buffer (current-buffer)))))
+    (if (not asynch-buffer)
+	;; We do not need to do anything, it was a mailto or something
+	;; similar that takes processing completely outside of the URL
+	;; package.
+	nil
+      (while (not retrieval-done)
+	(url-debug 'retrieval "Spinning in url-retrieve-synchronously: %S (%S)"
+		   retrieval-done asynch-buffer)
+	;; Quoth monnier:
+	;; It turns out that the problem seems to be that the (sit-for
+	;; 0.1) below doesn't actually process the data: instead it
+	;; returns immediately because there is keyboard input
+	;; waiting, so we end up spinning endlessly waiting for the
+	;; process to finish while not letting it finish.
+
+	;; However, raman claims that it blocks Emacs with Emacspeak
+	;; for unexplained reasons.  Put back for his benefit until
+	;; someone can understand it.
+	;; (sleep-for 0.1)
+	(sit-for 0.1))
+      asynch-buffer)))
+
+(defun url-mm-callback (&rest ignored)
+  (let ((handle (mm-dissect-buffer t)))
+    (save-excursion
+      (url-mark-buffer-as-dead (current-buffer))
+      (set-buffer (generate-new-buffer (url-recreate-url url-current-object)))
+      (if (eq (mm-display-part handle) 'external)
+	  (progn
+	    (set-process-sentinel
+	     ;; Fixme: this shouldn't have to know the form of the
+	     ;; undisplayer produced by `mm-display-part'.
+	     (get-buffer-process (cdr (mm-handle-undisplayer handle)))
+	     `(lambda (proc event)
+		(mm-destroy-parts (quote ,handle))))
+	    (message "Viewing externally")
+	    (kill-buffer (current-buffer)))
+	(display-buffer (current-buffer))
+	(mm-destroy-parts handle)))))
+
+(defun url-mm-url (url)
+  "Retrieve URL and pass to the appropriate viewing application."
+  (require 'mm-decode)
+  (require 'mm-view)
+  (url-retrieve url 'url-mm-callback nil))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Miscellaneous
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(defvar url-dead-buffer-list nil)
+
+(defun url-mark-buffer-as-dead (buff)
+  (push buff url-dead-buffer-list))
+
+(defun url-gc-dead-buffers ()
+  (let ((buff))
+    (while (setq buff (pop url-dead-buffer-list))
+      (if (buffer-live-p buff)
+	  (kill-buffer buff)))))
+
+(cond
+ ((fboundp 'display-warning)
+  (defalias 'url-warn 'display-warning))
+ ((fboundp 'warn)
+  (defun url-warn (class message &optional level)
+    (warn "(%s/%s) %s" class (or level 'warning) message)))
+ (t
+  (defun url-warn (class message &optional level)
+    (save-excursion
+      (set-buffer (get-buffer-create "*URL-WARNINGS*"))
+      (goto-char (point-max))
+      (save-excursion
+	(insert (format "(%s/%s) %s\n" class (or level 'warning) message)))
+      (display-buffer (current-buffer))))))
+
+(provide 'url)
+
+;;; url.el ends here