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8c8b8430 | 1 | ;;; url-file.el --- File retrieval code |
88c963ed | 2 | |
acaf905b | 3 | ;; Copyright (C) 1996-1999, 2004-2012 Free Software Foundation, Inc. |
88c963ed | 4 | |
8c8b8430 SM |
5 | ;; Keywords: comm, data, processes |
6 | ||
88c963ed SM |
7 | ;; This file is part of GNU Emacs. |
8 | ;; | |
4936186e | 9 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
88c963ed | 10 | ;; it under the terms of the GNU General Public License as published by |
4936186e GM |
11 | ;; the Free Software Foundation, either version 3 of the License, or |
12 | ;; (at your option) any later version. | |
13 | ||
88c963ed SM |
14 | ;; GNU Emacs is distributed in the hope that it will be useful, |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
4936186e | 18 | |
88c963ed | 19 | ;; You should have received a copy of the GNU General Public License |
4936186e | 20 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
88c963ed SM |
21 | |
22 | ;;; Commentary: | |
23 | ||
24 | ;;; Code: | |
8c8b8430 SM |
25 | |
26 | (eval-when-compile (require 'cl)) | |
27 | (require 'mailcap) | |
28 | (require 'url-vars) | |
29 | (require 'url-parse) | |
30 | (require 'url-dired) | |
31 | ||
32 | (defconst url-file-default-port 21 "Default FTP port.") | |
33 | (defconst url-file-asynchronous-p t "FTP transfers are asynchronous.") | |
34 | (defalias 'url-file-expand-file-name 'url-default-expander) | |
35 | ||
36 | (defun url-file-find-possibly-compressed-file (fname &rest args) | |
37 | "Find the exact file referenced by `fname'. | |
38 | This tries the common compression extensions, because things like | |
39 | ange-ftp and efs are not quite smart enough to realize when a server | |
40 | can do automatic decompression for them, and won't find 'foo' if | |
d1ce47b0 | 41 | 'foo.gz' exists, even though the FTP server would happily serve it up |
8c8b8430 SM |
42 | to them." |
43 | (let ((scratch nil) | |
44 | (compressed-extensions '("" ".gz" ".z" ".Z" ".bz2")) | |
45 | (found nil)) | |
46 | (while (and compressed-extensions (not found)) | |
47 | (if (file-exists-p (setq scratch (concat fname (pop compressed-extensions)))) | |
48 | (setq found scratch))) | |
49 | found)) | |
50 | ||
51 | (defun url-file-host-is-local-p (host) | |
3ecd3a56 | 52 | "Return t if HOST references our local machine." |
8c8b8430 SM |
53 | (let ((case-fold-search t)) |
54 | (or | |
55 | (null host) | |
56 | (string= "" host) | |
57 | (equal (downcase host) (downcase (system-name))) | |
58 | (and (string-match "^localhost$" host) t) | |
59 | (and (not (string-match (regexp-quote ".") host)) | |
60 | (equal (downcase host) (if (string-match (regexp-quote ".") | |
61 | (system-name)) | |
62 | (substring (system-name) 0 | |
63 | (match-beginning 0)) | |
64 | (system-name))))))) | |
65 | ||
66 | (defun url-file-asynch-callback (x y name buff func args &optional efs) | |
67 | (if (not (featurep 'ange-ftp)) | |
68 | ;; EFS passes us an extra argument | |
69 | (setq name buff | |
70 | buff func | |
71 | func args | |
72 | args efs)) | |
73 | (let ((size (nth 7 (file-attributes name)))) | |
175384d1 | 74 | (with-current-buffer buff |
8c8b8430 SM |
75 | (goto-char (point-max)) |
76 | (if (/= -1 size) | |
77 | (insert (format "Content-length: %d\n" size))) | |
78 | (insert "\n") | |
79 | (insert-file-contents-literally name) | |
80 | (if (not (url-file-host-is-local-p (url-host url-current-object))) | |
81 | (condition-case () | |
82 | (delete-file name) | |
83 | (error nil))) | |
84 | (apply func args)))) | |
85 | ||
40234eaf GM |
86 | (declare-function ange-ftp-set-passwd "ange-ftp" (host user passwd)) |
87 | (declare-function ange-ftp-copy-file-internal "ange-ftp" | |
153ef845 DN |
88 | (filename newname ok-if-already-exists |
89 | keep-date &optional msg cont nowait)) | |
90 | ||
8c8b8430 SM |
91 | (defun url-file-build-filename (url) |
92 | (if (not (vectorp url)) | |
93 | (setq url (url-generic-parse-url url))) | |
94 | (let* ((user (url-user url)) | |
95 | (pass (url-password url)) | |
96 | (port (url-port url)) | |
97 | (host (url-host url)) | |
98 | (site (if (and port (/= port 21)) | |
99 | (if (featurep 'ange-ftp) | |
100 | (format "%s %d" host port) | |
101 | ;; This works in Emacs 21's ange-ftp too. | |
102 | (format "%s#%d" host port)) | |
103 | host)) | |
104 | (file (url-unhex-string (url-filename url))) | |
023ec128 LMI |
105 | (filename (cond |
106 | ;; ftp: URL. | |
107 | ((or user (not (url-file-host-is-local-p host))) | |
108 | (concat "/" (or user "anonymous") "@" site ":" file)) | |
109 | ;; file: URL on Windows. | |
110 | ((and (string-match "\\`/[a-zA-Z]:/" file) | |
111 | (memq system-type '(ms-dos windows-nt))) | |
112 | (substring file 1)) | |
113 | ;; file: URL with a file:/bar:/foo-like spec. | |
114 | ((string-match "\\`/[^/]+:/" file) | |
115 | (concat "/:" file)) | |
116 | (t | |
117 | file))) | |
8c8b8430 SM |
118 | pos-index) |
119 | ||
120 | (and user pass | |
121 | (cond | |
122 | ((featurep 'ange-ftp) | |
123 | (ange-ftp-set-passwd host user pass)) | |
132d5910 GM |
124 | ((when (featurep 'xemacs) |
125 | (or (featurep 'efs) (featurep 'efs-auto) | |
126 | (efs-set-passwd host user pass)))) | |
8c8b8430 SM |
127 | (t |
128 | nil))) | |
129 | ||
130 | ;; This makes sure that directories have a trailing directory | |
131 | ;; separator on them so URL expansion works right. | |
132 | ;; | |
133 | ;; FIXME? What happens if the remote system doesn't use our local | |
134 | ;; directory-sep-char as its separator? Would it be safer to just | |
135 | ;; use '/' unconditionally and rely on the FTP server to | |
136 | ;; straighten it out for us? | |
88c963ed SM |
137 | ;; (if (and (file-directory-p filename) |
138 | ;; (not (string-match (format "%c$" directory-sep-char) filename))) | |
d18ec89f SM |
139 | ;; (setf (url-filename url) |
140 | ;; (format "%s%c" filename directory-sep-char))) | |
8c8b8430 | 141 | (if (and (file-directory-p filename) |
88c963ed | 142 | (not (string-match "/\\'" filename))) |
d18ec89f | 143 | (setf (url-filename url) (format "%s/" filename))) |
88c963ed | 144 | |
8c8b8430 SM |
145 | |
146 | ;; If it is a directory, look for an index file first. | |
147 | (if (and (file-directory-p filename) | |
148 | url-directory-index-file | |
149 | (setq pos-index (expand-file-name url-directory-index-file filename)) | |
150 | (file-exists-p pos-index) | |
151 | (file-readable-p pos-index)) | |
152 | (setq filename pos-index)) | |
153 | ||
154 | ;; Find the (possibly compressed) file | |
155 | (setq filename (url-file-find-possibly-compressed-file filename)) | |
156 | filename)) | |
157 | ||
158 | ;;;###autoload | |
159 | (defun url-file (url callback cbargs) | |
160 | "Handle file: and ftp: URLs." | |
161 | (let* ((buffer nil) | |
162 | (uncompressed-filename nil) | |
163 | (content-type nil) | |
164 | (content-encoding nil) | |
4f0f48df GM |
165 | (coding-system-for-read 'binary) |
166 | (filename (url-file-build-filename url))) | |
167 | (or filename (error "File does not exist: %s" (url-recreate-url url))) | |
8c8b8430 SM |
168 | ;; Need to figure out the content-type from the real extension, |
169 | ;; not the compressed one. | |
170 | (setq uncompressed-filename (if (string-match "\\.\\(gz\\|Z\\|z\\)$" filename) | |
171 | (substring filename 0 (match-beginning 0)) | |
172 | filename)) | |
173 | (setq content-type (mailcap-extension-to-mime | |
174 | (url-file-extension uncompressed-filename)) | |
175 | content-encoding (case (intern (url-file-extension filename)) | |
176 | ((\.z \.gz) "gzip") | |
177 | (\.Z "compress") | |
178 | (\.uue "x-uuencoded") | |
179 | (\.hqx "x-hqx") | |
180 | (\.bz2 "x-bzip2") | |
181 | (otherwise nil))) | |
182 | ||
183 | (if (file-directory-p filename) | |
184 | ;; A directory is done the same whether we are local or remote | |
185 | (url-find-file-dired filename) | |
175384d1 SM |
186 | (with-current-buffer |
187 | (setq buffer (generate-new-buffer " *url-file*")) | |
8c8b8430 SM |
188 | (mm-disable-multibyte) |
189 | (setq url-current-object url) | |
190 | (insert "Content-type: " (or content-type "application/octet-stream") "\n") | |
191 | (if content-encoding | |
192 | (insert "Content-transfer-encoding: " content-encoding "\n")) | |
193 | (if (url-file-host-is-local-p (url-host url)) | |
194 | ;; Local files are handled slightly oddly | |
195 | (if (featurep 'ange-ftp) | |
196 | (url-file-asynch-callback nil nil | |
197 | filename | |
198 | (current-buffer) | |
199 | callback cbargs) | |
200 | (url-file-asynch-callback nil nil nil | |
201 | filename | |
202 | (current-buffer) | |
203 | callback cbargs)) | |
204 | ;; FTP handling | |
092f7594 CY |
205 | (let ((new (make-temp-file |
206 | (format "url-tmp.%d" (user-real-uid))))) | |
8c8b8430 SM |
207 | (if (featurep 'ange-ftp) |
208 | (ange-ftp-copy-file-internal filename (expand-file-name new) t | |
209 | nil t | |
210 | (list 'url-file-asynch-callback | |
211 | new (current-buffer) | |
212 | callback cbargs) | |
213 | t) | |
132d5910 GM |
214 | (when (featurep 'xemacs) |
215 | (autoload 'efs-copy-file-internal "efs") | |
216 | (efs-copy-file-internal filename (efs-ftp-path filename) | |
217 | new (efs-ftp-path new) | |
218 | t nil 0 | |
219 | (list 'url-file-asynch-callback | |
220 | new (current-buffer) | |
221 | callback cbargs) | |
222 | 0 nil))))))) | |
8c8b8430 SM |
223 | buffer)) |
224 | ||
225 | (defmacro url-file-create-wrapper (method args) | |
ca000aff SM |
226 | `(defalias ',(intern (format "url-ftp-%s" method)) |
227 | (defun ,(intern (format "url-file-%s" method)) ,args | |
228 | ,(format "FTP/FILE URL wrapper around `%s' call." method) | |
229 | (setq url (url-file-build-filename url)) | |
230 | (and url (,method ,@(remove '&rest (remove '&optional args))))))) | |
8c8b8430 SM |
231 | |
232 | (url-file-create-wrapper file-exists-p (url)) | |
ca000aff | 233 | (url-file-create-wrapper file-attributes (url &optional id-format)) |
8c8b8430 SM |
234 | (url-file-create-wrapper file-symlink-p (url)) |
235 | (url-file-create-wrapper file-readable-p (url)) | |
236 | (url-file-create-wrapper file-writable-p (url)) | |
237 | (url-file-create-wrapper file-executable-p (url)) | |
cc38a294 EZ |
238 | (url-file-create-wrapper directory-files (url &optional full match nosort)) |
239 | (url-file-create-wrapper file-truename (url &optional counter prev-dirs)) | |
8c8b8430 SM |
240 | |
241 | (provide 'url-file) | |
e5566bd5 | 242 | |
88c963ed | 243 | ;;; url-file.el ends here |