(eval-when-compile (require 'url-parse))
(eval-when-compile (require 'mm-decode))
(autoload 'url-expand-file-name "url-expand" "Convert url to a fully specified url, and canonicalize it.")
(autoload 'mm-dissect-buffer "mm-decode" "Dissect the current buffer and return a list of MIME handles.")
(autoload 'url-scheme-get-property "url-methods" "Get property of a URL SCHEME.")
(eval-when-compile
(require 'cl))
(defvar url-handler-regexp
"\\`\\(https?\\|ftp\\|file\\|nfs\\)://"
"*A regular expression for matching URLs handled by file-name-handler-alist.
Some valid URL protocols just do not make sense to visit interactively
\(about, data, info, irc, mailto, etc\). This regular expression
avoids conflicts with local files that look like URLs \(Gnus is
particularly bad at this\).")
(define-minor-mode url-handler-mode
"Use URL to handle URL-like file names."
:global t :group 'url
(if (not (boundp 'file-name-handler-alist))
(setq url-handler-mode nil)
(setq file-name-handler-alist
(delq (rassq 'url-file-handler file-name-handler-alist)
file-name-handler-alist))
(if url-handler-mode
(push (cons url-handler-regexp 'url-file-handler)
file-name-handler-alist))))
(defun url-run-real-handler (operation args)
(let ((inhibit-file-name-handlers (cons 'url-file-handler
(if (eq operation inhibit-file-name-operation)
inhibit-file-name-handlers)))
(inhibit-file-name-operation operation))
(apply operation args)))
(defun url-file-handler (operation &rest args)
"Function called from the `file-name-handler-alist' routines.
OPERATION is what needs to be done (`file-exists-p', etc). ARGS are
the arguments that would have been passed to OPERATION."
(let ((fn (or (get operation 'url-file-handlers)
(intern-soft (format "url-%s" operation))))
(val nil)
(hooked nil))
(if (and fn (fboundp fn))
(setq hooked t
val (apply fn args))
(setq hooked nil
val (url-run-real-handler operation args)))
(url-debug 'handlers "%s %S%S => %S" (if hooked "Hooked" "Real")
operation args val)
val))
(defun url-file-handler-identity (&rest args)
(car args))
(put 'file-readable-p 'url-file-handlers 'url-file-exists-p)
(put 'substitute-in-file-name 'url-file-handlers 'url-file-handler-identity)
(put 'file-name-absolute-p 'url-file-handlers (lambda (&rest ignored) t))
(put 'expand-file-name 'url-file-handlers 'url-handler-expand-file-name)
(put 'directory-file-name 'url-file-handlers 'url-handler-directory-file-name)
(put 'file-writable-p 'url-file-handlers 'ignore)
(put 'file-symlink-p 'url-file-handlers 'ignore)
(put 'vc-registered 'url-file-handlers 'ignore)
(defun url-handler-expand-file-name (file &optional base)
(if (file-name-absolute-p file)
(expand-file-name file "/")
(url-expand-file-name file base)))
(defun url-handler-directory-file-name (dir)
(if (string-match "//\\'" dir) dir
(url-run-real-handler 'directory-file-name (list dir))))
(defun url-copy-file (url newname &optional ok-if-already-exists keep-time)
"Copy URL to NEWNAME. Both args must be strings.
Signals a `file-already-exists' error if file NEWNAME already exists,
unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
A number as third arg means request confirmation if NEWNAME already exists.
This is what happens in interactive use with M-x.
Fourth arg KEEP-TIME non-nil means give the new file the same
last-modified time as the old one. (This works on only some systems.)
A prefix arg makes KEEP-TIME non-nil."
(if (and (file-exists-p newname)
(not ok-if-already-exists))
(error "Opening output file: File already exists, %s" newname))
(let ((buffer (url-retrieve-synchronously url))
(handle nil))
(if (not buffer)
(error "Opening input file: No such file or directory, %s" url))
(with-current-buffer buffer
(setq handle (mm-dissect-buffer t)))
(mm-save-part-to-file handle newname)
(kill-buffer buffer)
(mm-destroy-parts handle)))
(defun url-file-local-copy (url &rest ignored)
"Copy URL into a temporary file on this machine.
Returns the name of the local copy, or nil, if FILE is directly
accessible."
(let ((filename (make-temp-file "url")))
(url-copy-file url filename 'ok-if-already-exists)
filename))
(defun url-insert (buffer &optional beg end)
"Insert the body of a URL object.
BUFFER should be a complete URL buffer as returned by `url-retrieve'.
If the headers specify a coding-system, it is applied to the body before it is inserted.
Returns a list of the form (SIZE CHARSET), where SIZE is the size in bytes
of the inserted text and CHARSET is the charset that was specified in the header,
or nil if none was found.
BEG and END can be used to only insert a subpart of the body.
They count bytes from the beginning of the body."
(let* ((handle (with-current-buffer buffer (mm-dissect-buffer t)))
(data (with-current-buffer (mm-handle-buffer handle)
(if beg
(buffer-substring (+ (point-min) beg)
(if end (+ (point-min) end) (point-max)))
(buffer-string))))
(charset (mail-content-type-get (mm-handle-type handle)
'charset)))
(mm-destroy-parts handle)
(if charset
(insert (mm-decode-string data (mm-charset-to-coding-system charset)))
(insert data))
(list (length data) charset)))
(defun url-insert-file-contents (url &optional visit beg end replace)
(let ((buffer (url-retrieve-synchronously url)))
(if (not buffer)
(error "Opening input file: No such file or directory, %s" url))
(if visit (setq buffer-file-name url))
(save-excursion
(let* ((start (point))
(size-and-charset (url-insert buffer beg end)))
(kill-buffer buffer)
(when replace
(delete-region (point-min) start)
(delete-region (point) (point-max)))
(unless (cadr size-and-charset)
(decode-coding-inserted-region start (point) url visit beg end replace))
(list url (car size-and-charset))))))
(defun url-file-name-completion (url directory)
(error "Unimplemented"))
(defun url-file-name-all-completions (file directory)
(error "Unimplemented"))
(defmacro url-handlers-create-wrapper (method args)
`(defun ,(intern (format "url-%s" method)) ,args
,(format "URL file-name-handler wrapper for `%s' call.\n---\n%s" method
(or (documentation method t) "No original documentation."))
(setq url (url-generic-parse-url url))
(when (url-type url)
(funcall (url-scheme-get-property (url-type url) (quote ,method))
,@(remove '&rest (remove '&optional args))))))
(url-handlers-create-wrapper file-exists-p (url))
(url-handlers-create-wrapper file-attributes (url &optional id-format))
(url-handlers-create-wrapper file-symlink-p (url))
(url-handlers-create-wrapper file-writable-p (url))
(url-handlers-create-wrapper file-directory-p (url))
(url-handlers-create-wrapper file-executable-p (url))
(url-handlers-create-wrapper directory-files (url &optional full match nosort))
(url-handlers-create-wrapper file-truename (url &optional counter prev-dirs))
(add-hook 'find-file-hook 'url-handlers-set-buffer-mode)
(defun url-handlers-set-buffer-mode ()
"Set correct modes for the current buffer if visiting a remote file."
(and (stringp buffer-file-name)
(string-match url-handler-regexp buffer-file-name)
(auto-save-mode 0)))
(provide 'url-handlers)