mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-12 09:28:24 +00:00
246 lines
8.8 KiB
EmacsLisp
246 lines
8.8 KiB
EmacsLisp
;;; url-file.el --- File retrieval code
|
|
|
|
;; Copyright (C) 1996-1999, 2004-2013 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 'mailcap)
|
|
(require 'url-vars)
|
|
(require 'url-parse)
|
|
(require 'url-dired)
|
|
|
|
(defconst url-file-default-port 21 "Default FTP port.")
|
|
(defconst url-file-asynchronous-p t "FTP transfers are asynchronous.")
|
|
(defalias 'url-file-expand-file-name 'url-default-expander)
|
|
|
|
(defun url-file-find-possibly-compressed-file (fname &rest args)
|
|
"Find the exact file referenced by `fname'.
|
|
This tries the common compression extensions, because things like
|
|
ange-ftp and efs are not quite smart enough to realize when a server
|
|
can do automatic decompression for them, and won't find 'foo' if
|
|
'foo.gz' exists, even though the FTP server would happily serve it up
|
|
to them."
|
|
(let ((scratch nil)
|
|
(compressed-extensions '("" ".gz" ".z" ".Z" ".bz2" ".xz"))
|
|
(found nil))
|
|
(while (and compressed-extensions (not found))
|
|
(if (file-exists-p (setq scratch (concat fname (pop compressed-extensions))))
|
|
(setq found scratch)))
|
|
found))
|
|
|
|
(defun url-file-host-is-local-p (host)
|
|
"Return t if HOST references our local machine."
|
|
(let ((case-fold-search t))
|
|
(or
|
|
(null host)
|
|
(string= "" host)
|
|
(equal (downcase host) (downcase (system-name)))
|
|
(and (string-match "^localhost$" host) t)
|
|
(and (not (string-match (regexp-quote ".") host))
|
|
(equal (downcase host) (if (string-match (regexp-quote ".")
|
|
(system-name))
|
|
(substring (system-name) 0
|
|
(match-beginning 0))
|
|
(system-name)))))))
|
|
|
|
(defun url-file-asynch-callback (x y name buff func args &optional efs)
|
|
(if (not (featurep 'ange-ftp))
|
|
;; EFS passes us an extra argument
|
|
(setq name buff
|
|
buff func
|
|
func args
|
|
args efs))
|
|
(let ((size (nth 7 (file-attributes name))))
|
|
(with-current-buffer buff
|
|
(goto-char (point-max))
|
|
(if (/= -1 size)
|
|
(insert (format "Content-length: %d\n" size)))
|
|
(insert "\n")
|
|
(insert-file-contents-literally name)
|
|
(if (not (url-file-host-is-local-p (url-host url-current-object)))
|
|
(condition-case ()
|
|
(delete-file name)
|
|
(error nil)))
|
|
(apply func args))))
|
|
|
|
(declare-function ange-ftp-set-passwd "ange-ftp" (host user passwd))
|
|
(declare-function ange-ftp-copy-file-internal "ange-ftp"
|
|
(filename newname ok-if-already-exists
|
|
keep-date &optional msg cont nowait))
|
|
|
|
(defun url-file-build-filename (url)
|
|
(if (not (vectorp url))
|
|
(setq url (url-generic-parse-url url)))
|
|
(let* ((user (url-user url))
|
|
(pass (url-password url))
|
|
(port (url-port url))
|
|
(host (url-host url))
|
|
(site (if (and port (/= port 21))
|
|
(if (featurep 'ange-ftp)
|
|
(format "%s %d" host port)
|
|
;; This works in Emacs 21's ange-ftp too.
|
|
(format "%s#%d" host port))
|
|
host))
|
|
(file (url-unhex-string (url-filename url)))
|
|
(filename (cond
|
|
;; ftp: URL.
|
|
((or user (not (url-file-host-is-local-p host)))
|
|
(concat "/" (or user "anonymous") "@" site ":" file))
|
|
;; file: URL on Windows.
|
|
((and (string-match "\\`/[a-zA-Z]:/" file)
|
|
(memq system-type '(ms-dos windows-nt)))
|
|
(substring file 1))
|
|
;; file: URL with a file:/bar:/foo-like spec.
|
|
((string-match "\\`/[^/]+:/" file)
|
|
(concat "/:" file))
|
|
(t
|
|
file)))
|
|
pos-index)
|
|
|
|
(and user pass
|
|
(cond
|
|
((featurep 'ange-ftp)
|
|
(ange-ftp-set-passwd host user pass))
|
|
((when (featurep 'xemacs)
|
|
(or (featurep 'efs) (featurep 'efs-auto)
|
|
(efs-set-passwd host user pass))))
|
|
(t
|
|
nil)))
|
|
|
|
;; This makes sure that directories have a trailing directory
|
|
;; separator on them so URL expansion works right.
|
|
;;
|
|
;; FIXME? What happens if the remote system doesn't use our local
|
|
;; directory-sep-char as its separator? Would it be safer to just
|
|
;; use '/' unconditionally and rely on the FTP server to
|
|
;; straighten it out for us?
|
|
;; (if (and (file-directory-p filename)
|
|
;; (not (string-match (format "%c$" directory-sep-char) filename)))
|
|
;; (setf (url-filename url)
|
|
;; (format "%s%c" filename directory-sep-char)))
|
|
(if (and (file-directory-p filename)
|
|
(not (string-match "/\\'" filename)))
|
|
(setf (url-filename url) (format "%s/" filename)))
|
|
|
|
|
|
;; If it is a directory, look for an index file first.
|
|
(if (and (file-directory-p filename)
|
|
url-directory-index-file
|
|
(setq pos-index (expand-file-name url-directory-index-file filename))
|
|
(file-exists-p pos-index)
|
|
(file-readable-p pos-index))
|
|
(setq filename pos-index))
|
|
|
|
;; Find the (possibly compressed) file
|
|
(setq filename (url-file-find-possibly-compressed-file filename))
|
|
filename))
|
|
|
|
;;;###autoload
|
|
(defun url-file (url callback cbargs)
|
|
"Handle file: and ftp: URLs."
|
|
(let* ((buffer nil)
|
|
(uncompressed-filename nil)
|
|
(content-type nil)
|
|
(content-encoding nil)
|
|
(coding-system-for-read 'binary)
|
|
(filename (url-file-build-filename url)))
|
|
(or filename (error "File does not exist: %s" (url-recreate-url url)))
|
|
;; Need to figure out the content-type from the real extension,
|
|
;; not the compressed one.
|
|
;; FIXME should this regexp not include more extensions; basically
|
|
;; everything that url-file-find-possibly-compressed-file does?
|
|
(setq uncompressed-filename (if (string-match "\\.\\(gz\\|Z\\|z\\)$" filename)
|
|
(substring filename 0 (match-beginning 0))
|
|
filename))
|
|
(setq content-type (mailcap-extension-to-mime
|
|
(url-file-extension uncompressed-filename))
|
|
content-encoding (pcase (url-file-extension filename)
|
|
((or ".z" ".gz") "gzip")
|
|
(".Z" "compress")
|
|
(".uue" "x-uuencoded")
|
|
(".hqx" "x-hqx")
|
|
(".bz2" "x-bzip2")
|
|
(".xz" "x-xz")
|
|
(_ nil)))
|
|
|
|
(if (file-directory-p filename)
|
|
;; A directory is done the same whether we are local or remote
|
|
(url-find-file-dired filename)
|
|
(with-current-buffer
|
|
(setq buffer (generate-new-buffer " *url-file*"))
|
|
(mm-disable-multibyte)
|
|
(setq url-current-object url)
|
|
(insert "Content-type: " (or content-type "application/octet-stream") "\n")
|
|
(if content-encoding
|
|
(insert "Content-transfer-encoding: " content-encoding "\n"))
|
|
(if (url-file-host-is-local-p (url-host url))
|
|
;; Local files are handled slightly oddly
|
|
(if (featurep 'ange-ftp)
|
|
(url-file-asynch-callback nil nil
|
|
filename
|
|
(current-buffer)
|
|
callback cbargs)
|
|
(url-file-asynch-callback nil nil nil
|
|
filename
|
|
(current-buffer)
|
|
callback cbargs))
|
|
;; FTP handling
|
|
(let ((new (make-temp-file
|
|
(format "url-tmp.%d" (user-real-uid)))))
|
|
(if (featurep 'ange-ftp)
|
|
(ange-ftp-copy-file-internal filename (expand-file-name new) t
|
|
nil t
|
|
(list 'url-file-asynch-callback
|
|
new (current-buffer)
|
|
callback cbargs)
|
|
t)
|
|
(when (featurep 'xemacs)
|
|
(autoload 'efs-copy-file-internal "efs")
|
|
(efs-copy-file-internal filename (efs-ftp-path filename)
|
|
new (efs-ftp-path new)
|
|
t nil 0
|
|
(list 'url-file-asynch-callback
|
|
new (current-buffer)
|
|
callback cbargs)
|
|
0 nil)))))))
|
|
buffer))
|
|
|
|
(defmacro url-file-create-wrapper (method args)
|
|
`(defalias ',(intern (format "url-ftp-%s" method))
|
|
(defun ,(intern (format "url-file-%s" method)) ,args
|
|
,(format "FTP/FILE URL wrapper around `%s' call." method)
|
|
(setq url (url-file-build-filename url))
|
|
(and url (,method ,@(remove '&rest (remove '&optional args)))))))
|
|
|
|
(url-file-create-wrapper file-exists-p (url))
|
|
(url-file-create-wrapper file-attributes (url &optional id-format))
|
|
(url-file-create-wrapper file-symlink-p (url))
|
|
(url-file-create-wrapper file-readable-p (url))
|
|
(url-file-create-wrapper file-writable-p (url))
|
|
(url-file-create-wrapper file-executable-p (url))
|
|
(url-file-create-wrapper directory-files (url &optional full match nosort))
|
|
(url-file-create-wrapper file-truename (url &optional counter prev-dirs))
|
|
|
|
(provide 'url-file)
|
|
|
|
;;; url-file.el ends here
|