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8c8b8430 | 1 | ;;; url-file.el --- File retrieval code |
88c963ed | 2 | |
71ddfde5 | 3 | ;; Copyright (C) 1996, 1997, 1998, 1999, 2004, |
5b0d63bc | 4 | ;; 2005, 2006 Free Software Foundation, Inc. |
88c963ed | 5 | |
8c8b8430 SM |
6 | ;; Keywords: comm, data, processes |
7 | ||
88c963ed SM |
8 | ;; This file is part of GNU Emacs. |
9 | ;; | |
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation; either version 2, or (at your option) | |
13 | ;; any later version. | |
14 | ;; | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ;; | |
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
4fc5845f LK |
22 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
23 | ;; Boston, MA 02110-1301, USA. | |
88c963ed SM |
24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;;; Code: | |
8c8b8430 SM |
28 | |
29 | (eval-when-compile (require 'cl)) | |
30 | (require 'mailcap) | |
31 | (require 'url-vars) | |
32 | (require 'url-parse) | |
33 | (require 'url-dired) | |
34 | ||
35 | (defconst url-file-default-port 21 "Default FTP port.") | |
36 | (defconst url-file-asynchronous-p t "FTP transfers are asynchronous.") | |
37 | (defalias 'url-file-expand-file-name 'url-default-expander) | |
38 | ||
39 | (defun url-file-find-possibly-compressed-file (fname &rest args) | |
40 | "Find the exact file referenced by `fname'. | |
41 | This tries the common compression extensions, because things like | |
42 | ange-ftp and efs are not quite smart enough to realize when a server | |
43 | can do automatic decompression for them, and won't find 'foo' if | |
44 | 'foo.gz' exists, even though the ftp server would happily serve it up | |
45 | to them." | |
46 | (let ((scratch nil) | |
47 | (compressed-extensions '("" ".gz" ".z" ".Z" ".bz2")) | |
48 | (found nil)) | |
49 | (while (and compressed-extensions (not found)) | |
50 | (if (file-exists-p (setq scratch (concat fname (pop compressed-extensions)))) | |
51 | (setq found scratch))) | |
52 | found)) | |
53 | ||
54 | (defun url-file-host-is-local-p (host) | |
55 | "Return t iff HOST references our local machine." | |
56 | (let ((case-fold-search t)) | |
57 | (or | |
58 | (null host) | |
59 | (string= "" host) | |
60 | (equal (downcase host) (downcase (system-name))) | |
61 | (and (string-match "^localhost$" host) t) | |
62 | (and (not (string-match (regexp-quote ".") host)) | |
63 | (equal (downcase host) (if (string-match (regexp-quote ".") | |
64 | (system-name)) | |
65 | (substring (system-name) 0 | |
66 | (match-beginning 0)) | |
67 | (system-name))))))) | |
68 | ||
69 | (defun url-file-asynch-callback (x y name buff func args &optional efs) | |
70 | (if (not (featurep 'ange-ftp)) | |
71 | ;; EFS passes us an extra argument | |
72 | (setq name buff | |
73 | buff func | |
74 | func args | |
75 | args efs)) | |
76 | (let ((size (nth 7 (file-attributes name)))) | |
175384d1 | 77 | (with-current-buffer buff |
8c8b8430 SM |
78 | (goto-char (point-max)) |
79 | (if (/= -1 size) | |
80 | (insert (format "Content-length: %d\n" size))) | |
81 | (insert "\n") | |
82 | (insert-file-contents-literally name) | |
83 | (if (not (url-file-host-is-local-p (url-host url-current-object))) | |
84 | (condition-case () | |
85 | (delete-file name) | |
86 | (error nil))) | |
87 | (apply func args)))) | |
88 | ||
89 | (defun url-file-build-filename (url) | |
90 | (if (not (vectorp url)) | |
91 | (setq url (url-generic-parse-url url))) | |
92 | (let* ((user (url-user url)) | |
93 | (pass (url-password url)) | |
94 | (port (url-port url)) | |
95 | (host (url-host url)) | |
96 | (site (if (and port (/= port 21)) | |
97 | (if (featurep 'ange-ftp) | |
98 | (format "%s %d" host port) | |
99 | ;; This works in Emacs 21's ange-ftp too. | |
100 | (format "%s#%d" host port)) | |
101 | host)) | |
102 | (file (url-unhex-string (url-filename url))) | |
103 | (filename (if (or user (not (url-file-host-is-local-p host))) | |
104 | (concat "/" (or user "anonymous") "@" site ":" file) | |
105 | (if (and (memq system-type | |
106 | '(emx ms-dos windows-nt ms-windows)) | |
107 | (string-match "^/[a-zA-Z]:/" file)) | |
108 | (substring file 1) | |
109 | file))) | |
110 | pos-index) | |
111 | ||
112 | (and user pass | |
113 | (cond | |
114 | ((featurep 'ange-ftp) | |
115 | (ange-ftp-set-passwd host user pass)) | |
116 | ((or (featurep 'efs) (featurep 'efs-auto)) | |
117 | (efs-set-passwd host user pass)) | |
118 | (t | |
119 | nil))) | |
120 | ||
121 | ;; This makes sure that directories have a trailing directory | |
122 | ;; separator on them so URL expansion works right. | |
123 | ;; | |
124 | ;; FIXME? What happens if the remote system doesn't use our local | |
125 | ;; directory-sep-char as its separator? Would it be safer to just | |
126 | ;; use '/' unconditionally and rely on the FTP server to | |
127 | ;; straighten it out for us? | |
88c963ed SM |
128 | ;; (if (and (file-directory-p filename) |
129 | ;; (not (string-match (format "%c$" directory-sep-char) filename))) | |
130 | ;; (url-set-filename url (format "%s%c" filename directory-sep-char))) | |
8c8b8430 | 131 | (if (and (file-directory-p filename) |
88c963ed SM |
132 | (not (string-match "/\\'" filename))) |
133 | (url-set-filename url (format "%s/" filename))) | |
134 | ||
8c8b8430 SM |
135 | |
136 | ;; If it is a directory, look for an index file first. | |
137 | (if (and (file-directory-p filename) | |
138 | url-directory-index-file | |
139 | (setq pos-index (expand-file-name url-directory-index-file filename)) | |
140 | (file-exists-p pos-index) | |
141 | (file-readable-p pos-index)) | |
142 | (setq filename pos-index)) | |
143 | ||
144 | ;; Find the (possibly compressed) file | |
145 | (setq filename (url-file-find-possibly-compressed-file filename)) | |
146 | filename)) | |
147 | ||
148 | ;;;###autoload | |
149 | (defun url-file (url callback cbargs) | |
150 | "Handle file: and ftp: URLs." | |
151 | (let* ((buffer nil) | |
152 | (uncompressed-filename nil) | |
153 | (content-type nil) | |
154 | (content-encoding nil) | |
155 | (coding-system-for-read 'binary)) | |
156 | ||
157 | (setq filename (url-file-build-filename url)) | |
158 | ||
159 | (if (not filename) | |
160 | (error "File does not exist: %s" (url-recreate-url url))) | |
161 | ||
162 | ;; Need to figure out the content-type from the real extension, | |
163 | ;; not the compressed one. | |
164 | (setq uncompressed-filename (if (string-match "\\.\\(gz\\|Z\\|z\\)$" filename) | |
165 | (substring filename 0 (match-beginning 0)) | |
166 | filename)) | |
167 | (setq content-type (mailcap-extension-to-mime | |
168 | (url-file-extension uncompressed-filename)) | |
169 | content-encoding (case (intern (url-file-extension filename)) | |
170 | ((\.z \.gz) "gzip") | |
171 | (\.Z "compress") | |
172 | (\.uue "x-uuencoded") | |
173 | (\.hqx "x-hqx") | |
174 | (\.bz2 "x-bzip2") | |
175 | (otherwise nil))) | |
176 | ||
177 | (if (file-directory-p filename) | |
178 | ;; A directory is done the same whether we are local or remote | |
179 | (url-find-file-dired filename) | |
175384d1 SM |
180 | (with-current-buffer |
181 | (setq buffer (generate-new-buffer " *url-file*")) | |
8c8b8430 SM |
182 | (mm-disable-multibyte) |
183 | (setq url-current-object url) | |
184 | (insert "Content-type: " (or content-type "application/octet-stream") "\n") | |
185 | (if content-encoding | |
186 | (insert "Content-transfer-encoding: " content-encoding "\n")) | |
187 | (if (url-file-host-is-local-p (url-host url)) | |
188 | ;; Local files are handled slightly oddly | |
189 | (if (featurep 'ange-ftp) | |
190 | (url-file-asynch-callback nil nil | |
191 | filename | |
192 | (current-buffer) | |
193 | callback cbargs) | |
194 | (url-file-asynch-callback nil nil nil | |
195 | filename | |
196 | (current-buffer) | |
197 | callback cbargs)) | |
198 | ;; FTP handling | |
199 | (let* ((extension (url-file-extension filename)) | |
200 | (new (url-generate-unique-filename | |
201 | (and (> (length extension) 0) | |
202 | (concat "%s." extension))))) | |
203 | (if (featurep 'ange-ftp) | |
204 | (ange-ftp-copy-file-internal filename (expand-file-name new) t | |
205 | nil t | |
206 | (list 'url-file-asynch-callback | |
207 | new (current-buffer) | |
208 | callback cbargs) | |
209 | t) | |
210 | (autoload 'efs-copy-file-internal "efs") | |
211 | (efs-copy-file-internal filename (efs-ftp-path filename) | |
212 | new (efs-ftp-path new) | |
213 | t nil 0 | |
214 | (list 'url-file-asynch-callback | |
215 | new (current-buffer) | |
216 | callback cbargs) | |
217 | 0 nil)))))) | |
218 | buffer)) | |
219 | ||
220 | (defmacro url-file-create-wrapper (method args) | |
ca000aff SM |
221 | `(defalias ',(intern (format "url-ftp-%s" method)) |
222 | (defun ,(intern (format "url-file-%s" method)) ,args | |
223 | ,(format "FTP/FILE URL wrapper around `%s' call." method) | |
224 | (setq url (url-file-build-filename url)) | |
225 | (and url (,method ,@(remove '&rest (remove '&optional args))))))) | |
8c8b8430 SM |
226 | |
227 | (url-file-create-wrapper file-exists-p (url)) | |
ca000aff | 228 | (url-file-create-wrapper file-attributes (url &optional id-format)) |
8c8b8430 SM |
229 | (url-file-create-wrapper file-symlink-p (url)) |
230 | (url-file-create-wrapper file-readable-p (url)) | |
231 | (url-file-create-wrapper file-writable-p (url)) | |
232 | (url-file-create-wrapper file-executable-p (url)) | |
cc38a294 EZ |
233 | (url-file-create-wrapper directory-files (url &optional full match nosort)) |
234 | (url-file-create-wrapper file-truename (url &optional counter prev-dirs)) | |
8c8b8430 SM |
235 | |
236 | (provide 'url-file) | |
e5566bd5 | 237 | |
88c963ed SM |
238 | ;; arch-tag: 010e914a-7313-494b-8a8c-6495a862157d |
239 | ;;; url-file.el ends here |