|
16
|
1 ;;; url-gw.el --- Gateway munging for URL loading
|
|
|
2 ;; Author: wmperry
|
|
|
3 ;; Created: 1997/01/16 14:17:34
|
|
|
4 ;; Version: 1.3
|
|
|
5 ;; Keywords: comm, data, processes
|
|
|
6
|
|
|
7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
8 ;;; Copyright (c) 1997 Free Software Foundation, Inc.
|
|
|
9 ;;;
|
|
|
10 ;;; This file is not part of GNU Emacs, but the same permissions apply.
|
|
|
11 ;;;
|
|
|
12 ;;; GNU Emacs is free software; you can redistribute it and/or modify
|
|
|
13 ;;; it under the terms of the GNU General Public License as published by
|
|
|
14 ;;; the Free Software Foundation; either version 2, or (at your option)
|
|
|
15 ;;; any later version.
|
|
|
16 ;;;
|
|
|
17 ;;; GNU Emacs is distributed in the hope that it will be useful,
|
|
|
18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
20 ;;; GNU General Public License for more details.
|
|
|
21 ;;;
|
|
|
22 ;;; You should have received a copy of the GNU General Public License
|
|
|
23 ;;; along with GNU Emacs; see the file COPYING. If not, write to the
|
|
|
24 ;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
25 ;;; Boston, MA 02111-1307, USA.
|
|
|
26 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
27 (require 'cl)
|
|
|
28
|
|
|
29 (defvar url-gateway-local-host-regexp nil
|
|
|
30 "*A regular expression specifying local hostnames/machines.")
|
|
|
31
|
|
|
32 (defvar url-gateway-prompt-pattern
|
|
|
33 "^[^#$%>;]*[#$%>;] *" ;; "bash\\|\$ *\r?$\\|> *\r?"
|
|
|
34 "*A regular expression matching a shell prompt.")
|
|
|
35
|
|
|
36 (defvar url-gateway-rlogin-host nil
|
|
|
37 "*What hostname to actually rlog into before doing a telnet.")
|
|
|
38
|
|
|
39 (defvar url-gateway-rlogin-user-name nil
|
|
|
40 "*Username to log into the remote machine with when using rlogin.")
|
|
|
41
|
|
|
42 (defvar url-gateway-rlogin-parameters '("telnet" "-8")
|
|
|
43 "*Parameters to `url-open-rlogin'.
|
|
|
44 This list will be used as the parameter list given to rsh.")
|
|
|
45
|
|
|
46 (defvar url-gateway-telnet-host nil
|
|
|
47 "*What hostname to actually login to before doing a telnet.")
|
|
|
48
|
|
|
49 (defvar url-gateway-telnet-parameters '("exec" "telnet" "-8")
|
|
|
50 "*Parameters to `url-open-telnet'.
|
|
|
51 This list will be executed as a command after logging in via telnet.")
|
|
|
52
|
|
|
53 (defvar url-gateway-telnet-login-prompt "^\r*.?login:"
|
|
|
54 "*Prompt that tells us we should send our username when loggin in w/telnet.")
|
|
|
55
|
|
|
56 (defvar url-gateway-telnet-password-prompt "^\r*.?password:"
|
|
|
57 "*Prompt that tells us we should send our password when loggin in w/telnet.")
|
|
|
58
|
|
|
59 (defvar url-gateway-telnet-user-name nil
|
|
|
60 "User name to log in via telnet with.")
|
|
|
61
|
|
|
62 (defvar url-gateway-telnet-password nil
|
|
|
63 "Password to use to log in via telnet with.")
|
|
|
64
|
|
|
65 (defvar url-gateway-broken-resolution nil
|
|
|
66 "*Whether to use nslookup to resolve hostnames.
|
|
|
67 This should be used when your version of Emacs cannot correctly use DNS,
|
|
|
68 but your machine can. This usually happens if you are running a statically
|
|
|
69 linked Emacs under SunOS 4.x")
|
|
|
70
|
|
|
71 (defvar url-gateway-nslookup-program nil
|
|
|
72 "*If non-NIL then a string naming nslookup program." )
|
|
|
73
|
|
|
74 ;; Stolen from ange-ftp
|
|
|
75 (defun url-gateway-nslookup-host (host)
|
|
|
76 "Attempt to resolve the given HOSTNAME using nslookup if possible."
|
|
|
77 (interactive "sHost: ")
|
|
|
78 (if url-gateway-nslookup-program
|
|
|
79 (let ((proc (start-process " *nslookup*" " *nslookup*"
|
|
|
80 url-gateway-nslookup-program host))
|
|
|
81 (res host))
|
|
|
82 (process-kill-without-query proc)
|
|
|
83 (save-excursion
|
|
|
84 (set-buffer (process-buffer proc))
|
|
|
85 (while (memq (process-status proc) '(run open))
|
|
|
86 (accept-process-output proc))
|
|
|
87 (goto-char (point-min))
|
|
|
88 (if (re-search-forward "Name:.*\nAddress: *\\(.*\\)$" nil t)
|
|
|
89 (setq res (buffer-substring (match-beginning 1)
|
|
|
90 (match-end 1))))
|
|
|
91 (kill-buffer (current-buffer)))
|
|
|
92 res)
|
|
|
93 host))
|
|
|
94
|
|
|
95 ;; Stolen from red gnus nntp.el
|
|
|
96 (defun url-wait-for-string (regexp proc)
|
|
|
97 "Wait until string arrives in the buffer."
|
|
|
98 (let ((buf (current-buffer)))
|
|
|
99 (goto-char (point-min))
|
|
|
100 (while (not (re-search-forward regexp nil t))
|
|
|
101 (accept-process-output proc)
|
|
|
102 (set-buffer buf)
|
|
|
103 (goto-char (point-min)))))
|
|
|
104
|
|
|
105 ;; Stolen from red gnus nntp.el
|
|
|
106 (defun url-open-rlogin (name buffer host service)
|
|
|
107 "Open a connection using rsh."
|
|
|
108 (if (not (stringp service))
|
|
|
109 (setq service (into-to-string service)))
|
|
|
110 (let ((proc (if url-gateway-rlogin-user-name
|
|
|
111 (start-process
|
|
|
112 name buffer "rsh"
|
|
|
113 url-gateway-rlogin-host "-l" url-gateway-rlogin-user-name
|
|
|
114 (mapconcat 'identity
|
|
|
115 (append url-gateway-rlogin-parameters
|
|
|
116 (list host service)) " "))
|
|
|
117 (start-process
|
|
|
118 name buffer "rsh" url-gateway-rlogin-host
|
|
|
119 (mapconcat 'identity
|
|
|
120 (append url-gateway-rlogin-parameters
|
|
|
121 (list host service))
|
|
|
122 " ")))))
|
|
|
123 (set-buffer buffer)
|
|
|
124 (url-wait-for-string "^\r*200" proc)
|
|
|
125 (beginning-of-line)
|
|
|
126 (delete-region (point-min) (point))
|
|
|
127 proc))
|
|
|
128
|
|
|
129 ;; Stolen from red gnus nntp.el
|
|
|
130 (defun url-open-telnet (name buffer host service)
|
|
|
131 (if (not (stringp service))
|
|
|
132 (setq service (into-to-string service)))
|
|
|
133 (save-excursion
|
|
|
134 (set-buffer (get-buffer-create buffer))
|
|
|
135 (erase-buffer)
|
|
|
136 (let ((proc (start-process name buffer "telnet" "-8"))
|
|
|
137 (case-fold-search t))
|
|
|
138 (when (memq (process-status proc) '(open run))
|
|
|
139 (process-send-string proc "set escape \^X\n")
|
|
|
140 (process-send-string proc (concat
|
|
|
141 "open " url-gateway-telnet-host "\n"))
|
|
|
142 (url-wait-for-string url-gateway-telnet-login-prompt proc)
|
|
|
143 (process-send-string
|
|
|
144 proc (concat
|
|
|
145 (or url-gateway-telnet-user-name
|
|
|
146 (setq url-gateway-telnet-user-name (read-string "login: ")))
|
|
|
147 "\n"))
|
|
|
148 (url-wait-for-string url-gateway-telnet-password-prompt proc)
|
|
|
149 (process-send-string
|
|
|
150 proc (concat
|
|
|
151 (or url-gateway-telnet-password
|
|
|
152 (setq url-gateway-telnet-password
|
|
|
153 (funcall url-passwd-entry-func "Password: ")))
|
|
|
154 "\n"))
|
|
|
155 (erase-buffer)
|
|
|
156 (url-wait-for-string url-gateway-prompt-pattern proc)
|
|
|
157 (process-send-string
|
|
|
158 proc (concat (mapconcat 'identity
|
|
|
159 (append url-gateway-telnet-parameters
|
|
|
160 (list host service)) " ") "\n"))
|
|
|
161 (url-wait-for-string "^\r*Escape character.*\r*\n+" proc)
|
|
|
162 (delete-region (point-min) (match-end 0))
|
|
|
163 (process-send-string proc "\^]\n")
|
|
|
164 (url-wait-for-string "^telnet" proc)
|
|
|
165 (process-send-string proc "mode character\n")
|
|
|
166 (accept-process-output proc 1)
|
|
|
167 (sit-for 1)
|
|
|
168 (goto-char (point-min))
|
|
|
169 (forward-line 1)
|
|
|
170 (delete-region (point) (point-max)))
|
|
|
171 proc)))
|
|
|
172
|
|
|
173 ;;###autoload
|
|
|
174 (defun url-open-stream (name buffer host service)
|
|
|
175 "Open a stream to a host"
|
|
|
176 (let ((gw-method (if (and url-gateway-local-host-regexp
|
|
|
177 (not (eq 'ssl url-gateway-method))
|
|
|
178 (string-match
|
|
|
179 url-gateway-local-host-regexp
|
|
|
180 host))
|
|
|
181 'native
|
|
|
182 url-gateway-method))
|
|
|
183 ;; This hack is for OS/2 Emacs so that it will not do bogus CRLF
|
|
|
184 ;; conversions while trying to be 'helpful'
|
|
|
185 (tcp-binary-process-output-services (if (stringp service)
|
|
|
186 (list service)
|
|
|
187 (list service
|
|
|
188 (int-to-string service))))
|
|
|
189
|
|
|
190 ;; An attempt to deal with denied connections, and attempt to reconnect
|
|
|
191 (max-retries url-connection-retries)
|
|
|
192 (cur-retries 0)
|
|
|
193 (retry t)
|
|
|
194 (errobj nil)
|
|
|
195 (conn nil))
|
|
|
196
|
|
|
197 ;; If the user told us to do DNS for them, do it.
|
|
|
198 (if url-gateway-broken-resolution
|
|
|
199 (setq host (url-nslookup-host host)))
|
|
|
200
|
|
|
201 (while (and (not conn) retry)
|
|
|
202 (condition-case errobj
|
|
|
203 (setq conn (case gw-method
|
|
|
204 (ssl
|
|
|
205 (open-ssl-stream name buffer host service))
|
|
|
206 ((tcp native)
|
|
|
207 (and (eq 'tcp gw-method) (require 'tcp))
|
|
|
208 (open-network-stream name buffer host service))
|
|
|
209 (socks
|
|
|
210 (socks-open-network-stream name buffer host service))
|
|
|
211 (telnet
|
|
|
212 (url-open-telnet name buffer host service))
|
|
|
213 (rlogin
|
|
|
214 (url-open-rlogin name buffer host service))
|
|
|
215 (otherwise
|
|
|
216 (error "Bad setting of url-gateway-method: %s"
|
|
|
217 url-gateway-method))))
|
|
|
218 (error
|
|
|
219 (url-save-error errobj)
|
|
|
220 (save-window-excursion
|
|
|
221 (save-excursion
|
|
|
222 (switch-to-buffer-other-window " *url-error*")
|
|
|
223 (shrink-window-if-larger-than-buffer)
|
|
|
224 (goto-char (point-min))
|
|
|
225 (if (and (re-search-forward "in use" nil t)
|
|
|
226 (< cur-retries max-retries))
|
|
|
227 (progn
|
|
|
228 (setq retry t
|
|
|
229 cur-retries (1+ cur-retries))
|
|
|
230 (sleep-for 0.5))
|
|
|
231 (setq cur-retries 0
|
|
|
232 retry (funcall url-confirmation-func
|
|
|
233 (concat "Connection to " host
|
|
|
234 " failed, retry? "))))
|
|
|
235 (kill-buffer (current-buffer)))))))
|
|
|
236 (if (not conn)
|
|
|
237 (error "Unable to connect to %s:%s" host service)
|
|
|
238 (mule-inhibit-code-conversion conn)
|
|
|
239 conn)))
|
|
|
240
|
|
|
241 (provide 'url-gw)
|
