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- ;;; url-gw.el --- Gateway munging for URL loading
- ;; Author: wmperry
- ;; Created: 1997/10/22 16:44:36
- ;; Version: 1.10
- ;; Keywords: comm, data, processes
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Copyright (c) 1997 Free Software Foundation, Inc.
- ;;;
- ;;; This file is not part of GNU Emacs, but the same permissions apply.
- ;;;
- ;;; 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 2, 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; see the file COPYING. If not, write to the
- ;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;;; Boston, MA 02111-1307, USA.
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- (require 'cl)
-
- (defgroup url-gateway nil
- "URL gateway variables"
- :group 'url)
-
- (defcustom url-gateway-local-host-regexp nil
- "*A regular expression specifying local hostnames/machines."
- :type '(choice (const nil) regexp)
- :group 'url-gateway)
-
- (defcustom url-gateway-prompt-pattern
- "^[^#$%>;]*[#$%>;] *" ;; "bash\\|\$ *\r?$\\|> *\r?"
- "*A regular expression matching a shell prompt."
- :type 'regexp
- :group 'url-gateway)
-
- (defcustom url-gateway-rlogin-host nil
- "*What hostname to actually rlog into before doing a telnet."
- :type '(choice (const nil) string)
- :group 'url-gateway)
-
- (defcustom url-gateway-rlogin-user-name nil
- "*Username to log into the remote machine with when using rlogin."
- :type '(choice (const nil) string)
- :group 'url-gateway)
-
- (defcustom url-gateway-rlogin-parameters '("telnet" "-8")
- "*Parameters to `url-open-rlogin'.
- This list will be used as the parameter list given to rsh."
- :type '(repeat string)
- :group 'url-gateway)
-
- (defcustom url-gateway-telnet-host nil
- "*What hostname to actually login to before doing a telnet."
- :type '(choice (const nil) string)
- :group 'url-gateway)
-
- (defcustom url-gateway-telnet-parameters '("exec" "telnet" "-8")
- "*Parameters to `url-open-telnet'.
- This list will be executed as a command after logging in via telnet."
- :type '(repeat string)
- :group 'url-gateway)
-
- (defcustom url-gateway-telnet-login-prompt "^\r*.?login:"
- "*Prompt that tells us we should send our username when loggin in w/telnet."
- :type 'regexp
- :group 'url-gateway)
-
- (defcustom url-gateway-telnet-password-prompt "^\r*.?password:"
- "*Prompt that tells us we should send our password when loggin in w/telnet."
- :type 'regexp
- :group 'url-gateway)
-
- (defcustom url-gateway-telnet-user-name nil
- "User name to log in via telnet with."
- :type '(choice (const nil) string)
- :group 'url-gateway)
-
- (defcustom url-gateway-telnet-password nil
- "Password to use to log in via telnet with."
- :type '(choice (const nil) string)
- :group 'url-gateway)
-
- (defcustom url-gateway-broken-resolution nil
- "*Whether to use nslookup to resolve hostnames.
- This should be used when your version of Emacs cannot correctly use DNS,
- but your machine can. This usually happens if you are running a statically
- linked Emacs under SunOS 4.x"
- :type 'boolean
- :group 'url-gateway)
-
- (defcustom url-gateway-nslookup-program "nslookup"
- "*If non-NIL then a string naming nslookup program."
- :type '(choice (const :tag "None" :value nil) string)
- :group 'url-gateway)
-
- ;; Stolen from ange-ftp
- ;;;###autoload
- (defun url-gateway-nslookup-host (host)
- "Attempt to resolve the given HOSTNAME using nslookup if possible."
- (interactive "sHost: ")
- (if url-gateway-nslookup-program
- (let ((proc (start-process " *nslookup*" " *nslookup*"
- url-gateway-nslookup-program host))
- (res host))
- (process-kill-without-query proc)
- (save-excursion
- (set-buffer (process-buffer proc))
- (while (memq (process-status proc) '(run open))
- (accept-process-output proc))
- (goto-char (point-min))
- (if (re-search-forward "Name:.*\nAddress: *\\(.*\\)$" nil t)
- (setq res (buffer-substring (match-beginning 1)
- (match-end 1))))
- (kill-buffer (current-buffer)))
- res)
- host))
-
- ;; Stolen from red gnus nntp.el
- (defun url-wait-for-string (regexp proc)
- "Wait until string arrives in the buffer."
- (let ((buf (current-buffer)))
- (goto-char (point-min))
- (while (not (re-search-forward regexp nil t))
- (accept-process-output proc)
- (set-buffer buf)
- (goto-char (point-min)))))
-
- ;; Stolen from red gnus nntp.el
- (defun url-open-rlogin (name buffer host service)
- "Open a connection using rsh."
- (if (not (stringp service))
- (setq service (int-to-string service)))
- (let ((proc (if url-gateway-rlogin-user-name
- (start-process
- name buffer "rsh"
- url-gateway-rlogin-host "-l" url-gateway-rlogin-user-name
- (mapconcat 'identity
- (append url-gateway-rlogin-parameters
- (list host service)) " "))
- (start-process
- name buffer "rsh" url-gateway-rlogin-host
- (mapconcat 'identity
- (append url-gateway-rlogin-parameters
- (list host service))
- " ")))))
- (set-buffer buffer)
- (url-wait-for-string "^\r*200" proc)
- (beginning-of-line)
- (delete-region (point-min) (point))
- proc))
-
- ;; Stolen from red gnus nntp.el
- (defun url-open-telnet (name buffer host service)
- (if (not (stringp service))
- (setq service (int-to-string service)))
- (save-excursion
- (set-buffer (get-buffer-create buffer))
- (erase-buffer)
- (let ((proc (start-process name buffer "telnet" "-8"))
- (case-fold-search t))
- (when (memq (process-status proc) '(open run))
- (process-send-string proc "set escape \^X\n")
- (process-send-string proc (concat
- "open " url-gateway-telnet-host "\n"))
- (url-wait-for-string url-gateway-telnet-login-prompt proc)
- (process-send-string
- proc (concat
- (or url-gateway-telnet-user-name
- (setq url-gateway-telnet-user-name (read-string "login: ")))
- "\n"))
- (url-wait-for-string url-gateway-telnet-password-prompt proc)
- (process-send-string
- proc (concat
- (or url-gateway-telnet-password
- (setq url-gateway-telnet-password
- (funcall url-passwd-entry-func "Password: ")))
- "\n"))
- (erase-buffer)
- (url-wait-for-string url-gateway-prompt-pattern proc)
- (process-send-string
- proc (concat (mapconcat 'identity
- (append url-gateway-telnet-parameters
- (list host service)) " ") "\n"))
- (url-wait-for-string "^\r*Escape character.*\r*\n+" proc)
- (delete-region (point-min) (match-end 0))
- (process-send-string proc "\^]\n")
- (url-wait-for-string "^telnet" proc)
- (process-send-string proc "mode character\n")
- (accept-process-output proc 1)
- (sit-for 1)
- (goto-char (point-min))
- (forward-line 1)
- (delete-region (point) (point-max)))
- proc)))
-
- ;;;###autoload
- (defun url-open-stream (name buffer host service)
- "Open a stream to a host"
- (let ((gw-method (if (and url-gateway-local-host-regexp
- (not (eq 'ssl url-gateway-method))
- (string-match
- url-gateway-local-host-regexp
- host))
- 'native
- url-gateway-method))
- ;; This hack is for OS/2 Emacs so that it will not do bogus CRLF
- ;; conversions while trying to be 'helpful'
- (tcp-binary-process-output-services (if (stringp service)
- (list service)
- (list service
- (int-to-string service))))
-
- ;; An attempt to deal with denied connections, and attempt to reconnect
- (cur-retries 0)
- (retry t)
- (errobj nil)
- (conn nil))
-
- ;; If the user told us to do DNS for them, do it.
- (if url-gateway-broken-resolution
- (setq host (url-gateway-nslookup-host host)))
-
- (condition-case errobj
- (setq conn (case gw-method
- (ssl
- (open-ssl-stream name buffer host service))
- ((tcp native)
- (and (eq 'tcp gw-method) (require 'tcp))
- (open-network-stream name buffer host service))
- (socks
- (socks-open-network-stream name buffer host service))
- (telnet
- (url-open-telnet name buffer host service))
- (rlogin
- (url-open-rlogin name buffer host service))
- (otherwise
- (error "Bad setting of url-gateway-method: %s"
- url-gateway-method))))
- (error
- (insert "Could not contact host: " host " / "
- (if (stringp service) service (int-to-string service))
- "\nAttempted using gateway method: "
- (symbol-name gw-method)
- "\n---- Error was: ----\n")
- (setq url-current-mime-headers '(("content-type" . "text/plain")))
- (display-error errobj (current-buffer))))
- (if conn
- (mule-inhibit-code-conversion conn))
- conn))
-
- (provide 'url-gw)
-