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1 ;;; url-misc.el,v --- Misc Uniform Resource Locator retrieval code
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2 ;; Author: wmperry
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3 ;; Created: 1995/11/19 18:46:45
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4 ;; Version: 1.4
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5 ;; Keywords: comm, data, processes
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6
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7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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8 ;;; Copyright (c) 1993, 1994, 1995 by William M. Perry (wmperry@spry.com)
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9 ;;;
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10 ;;; This file is not part of GNU Emacs, but the same permissions apply.
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11 ;;;
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12 ;;; GNU Emacs is free software; you can redistribute it and/or modify
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13 ;;; it under the terms of the GNU General Public License as published by
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14 ;;; the Free Software Foundation; either version 2, or (at your option)
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15 ;;; any later version.
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16 ;;;
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17 ;;; GNU Emacs is distributed in the hope that it will be useful,
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18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 ;;; GNU General Public License for more details.
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21 ;;;
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22 ;;; You should have received a copy of the GNU General Public License
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23 ;;; along with GNU Emacs; see the file COPYING. If not, write to
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24 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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25 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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26
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27 (require 'url-vars)
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28 (require 'url-parse)
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29 (autoload 'Info-goto-node "info" "" t)
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30
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31 (defun url-info (url)
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32 ;; Fetch an info node
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33 (if (get-buffer url-working-buffer)
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34 (kill-buffer url-working-buffer))
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35 (let* ((data (url-generic-parse-url url))
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36 (fname (url-filename data))
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37 (node (or (url-target data) "Top")))
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38 (if (and fname node)
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39 (Info-goto-node (concat "(" fname ")" node))
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40 (error "Malformed url: %s" url))))
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41
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42 (defun url-finger (url)
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43 ;; Find a finger reference
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44 (setq url-current-mime-headers '(("content-type" . "text/html"))
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45 url-current-mime-type "text/html")
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46 (set-buffer (get-buffer-create url-working-buffer))
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47 (let* ((urlobj (if (vectorp url) url
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48 (url-generic-parse-url url)))
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49 (host (or (url-host urlobj) "localhost"))
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50 (port (or (url-port urlobj)
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51 (cdr-safe (assoc "finger" url-default-ports))))
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52 (user (url-unhex-string (url-filename urlobj)))
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53 (proc (url-open-stream "finger" url-working-buffer host
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54 (string-to-int port))))
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55 (if (stringp proc)
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56 (message "%s" proc)
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57 (process-kill-without-query proc)
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58 (if (= (string-to-char user) ?/)
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59 (setq user (substring user 1 nil)))
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60 (goto-char (point-min))
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61 (insert "<html>\n"
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62 " <head>\n"
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63 " <title>Finger information for " user "@" host "</title>\n"
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64 " </head>\n"
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65 " <body>\n"
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66 " <h1>Finger information for " user "@" host "</h1>\n"
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67 " <hr>\n"
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68 " <pre>\n")
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69 (process-send-string proc (concat user "\r\n"))
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70 (while (memq (url-process-status proc) '(run open))
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71 (url-after-change-function)
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72 (url-accept-process-output proc))
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73 (goto-char (point-min))
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74 (url-replace-regexp "^Process .* exited .*code .*$" "")
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75 (goto-char (point-max))
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76 (insert " </pre>\n"
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77 " </body>\n"
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78 "</html>\n"))))
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79
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80 (defun url-rlogin (url)
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81 ;; Open up an rlogin connection
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82 (if (get-buffer url-working-buffer)
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83 (kill-buffer url-working-buffer))
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84 (or (string-match "rlogin:/*\\(.*@\\)*\\([^/]*\\)/*" url)
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85 (error "Malformed RLOGIN URL."))
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86 (let* ((server (substring url (match-beginning 2) (match-end 2)))
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87 (name (if (match-beginning 1)
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88 (substring url (match-beginning 1) (1- (match-end 1)))
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89 nil))
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90 (title (format "%s%s" (if name (concat name "@") "") server))
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91 (thebuf (string-match ":" server))
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92 (port (if thebuf
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93 (prog1
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94 (substring server (1+ thebuf) nil)
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95 (setq server (substring server 0 thebuf))) "23")))
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96 (cond
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97 ((not (eq (device-type) 'tty))
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98 (apply 'start-process
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99 "htmlsub"
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100 nil
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101 (url-string-to-tokens
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102 (format url-xterm-command title
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103 (if (and url-gateway-local-host-regexp
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104 (string-match url-gateway-local-host-regexp
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105 server))
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106 url-local-rlogin-prog
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107 url-remote-rlogin-prog) server
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108 (concat "-l " name)) ? )))
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109 (url-use-transparent
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110 (require 'transparent)
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111 (sit-for 1)
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112 (transparent-window (get-buffer-create
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113 (format "%s%s:%s" (if name (concat name "@") "")
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114 server port))
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115 (if (and url-gateway-local-host-regexp
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116 (string-match url-gateway-local-host-regexp
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117 server))
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118 url-local-rlogin-prog
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119 url-remote-rlogin-prog)
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120 (list server "-l" name) nil
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121 "Press any key to return to emacs"))
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122 (t
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123 (terminal-emulator
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124 (get-buffer-create (format "%s%s:%s" (if name (concat name "@") "")
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125 server port))
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126 (if (and url-gateway-local-host-regexp
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127 (string-match url-gateway-local-host-regexp
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128 server))
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129 url-local-rlogin-prog
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130 url-remote-rlogin-prog)
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131 (list server "-l" name))))))
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132
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133 (defun url-telnet (url)
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134 ;; Open up a telnet connection
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135 (if (get-buffer url-working-buffer)
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136 (kill-buffer url-working-buffer))
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137 (or (string-match "telnet:/*\\(.*@\\)*\\([^/]*\\)/*" url)
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138 (error "Malformed telnet URL: %s" url))
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139 (let* ((server (substring url (match-beginning 2) (match-end 2)))
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140 (name (if (match-beginning 1)
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141 (substring url (match-beginning 1) (1- (match-end 1)))
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142 nil))
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143 (title (format "%s%s" (if name (concat name "@") "") server))
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144 (thebuf (string-match ":" server))
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145 (port (if thebuf
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146 (prog1
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147 (substring server (1+ thebuf) nil)
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148 (setq server (substring server 0 thebuf))) "23")))
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149 (cond
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150 ((not (eq (device-type) 'tty))
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151 (apply 'start-process
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152 "htmlsub"
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153 nil
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154 (url-string-to-tokens
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155 (format url-xterm-command title
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156 (if (and url-gateway-local-host-regexp
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157 (string-match url-gateway-local-host-regexp
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158 server))
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159 url-local-telnet-prog
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160 url-remote-telnet-prog) server port) ? ))
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161 (if name (message "Please log in as %s" name)))
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162 (url-use-transparent
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163 (require 'transparent)
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164 (if name (message "Please log in as %s" name))
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165 (sit-for 1)
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166 (transparent-window (get-buffer-create
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167 (format "%s%s:%s" (if name (concat name "@") "")
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168 server port))
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169 (if (and url-gateway-local-host-regexp
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170 (string-match url-gateway-local-host-regexp
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171 server))
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172 url-local-telnet-prog
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173 url-remote-telnet-prog)
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174 (list server port) nil
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175 "Press any key to return to emacs"))
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176 (t
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177 (terminal-emulator
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178 (get-buffer-create (format "%s%s:%s" (if name (concat name "@") "")
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179 server port))
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180 (if (and url-gateway-local-host-regexp
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181 (string-match url-gateway-local-host-regexp
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182 server))
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183 url-local-telnet-prog
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184 url-remote-telnet-prog)
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185 (list server port))
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186 (if name (message "Please log in as %s" name))))))
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187
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188 (defun url-tn3270 (url)
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189 ;; Open up a tn3270 connection
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190 (if (get-buffer url-working-buffer)
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191 (kill-buffer url-working-buffer))
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192 (string-match "tn3270:/*\\(.*@\\)*\\([^/]*\\)/*" url)
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193 (let* ((server (substring url (match-beginning 2) (match-end 2)))
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194 (name (if (match-beginning 1)
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195 (substring url (match-beginning 1) (1- (match-end 1)))
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196 nil))
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197 (thebuf (string-match ":" server))
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198 (title (format "%s%s" (if name (concat name "@") "") server))
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199 (port (if thebuf
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200 (prog1
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201 (substring server (1+ thebuf) nil)
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202 (setq server (substring server 0 thebuf))) "23")))
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203 (cond
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204 ((not (eq (device-type) 'tty))
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205 (start-process "htmlsub" nil url-xterm-command
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206 "-title" title
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207 "-ut" "-e" url-tn3270-emulator server port)
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208 (if name (message "Please log in as %s" name)))
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209 (url-use-transparent
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210 (require 'transparent)
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211 (if name (message "Please log in as %s" name))
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212 (sit-for 1)
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213 (transparent-window (get-buffer-create
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214 (format "%s%s:%s" (if name (concat name "@") "")
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215 server port))
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216 url-tn3270-emulator
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217 (list server port) nil
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218 "Press any key to return to emacs"))
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219 (t
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220 (terminal-emulator
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221 (get-buffer-create (format "%s%s:%s" (if name (concat name "@") "")
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222 server port))
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223 url-tn3270-emulator
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224 (list server port))
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225 (if name (message "Please log in as %s" name))))))
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226
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227 (defun url-proxy (url)
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228 ;; Retrieve URL from a proxy.
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229 ;; Expects `url-using-proxy' to be bound to the specific proxy to use."
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230 (let (
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231 (urlobj (url-generic-parse-url url))
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232 (proxyobj (url-generic-parse-url url-using-proxy)))
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233 (url-http url-using-proxy url)
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234 (setq url-current-type (url-type urlobj)
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235 url-current-user (url-user urlobj)
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236 url-current-port (or (url-port urlobj)
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237 (cdr-safe (assoc url-current-type
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238 url-default-ports)))
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239 url-current-server (url-host urlobj)
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240 url-current-file (url-filename urlobj))))
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241
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242 (defun url-x-exec (url)
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243 ;; Handle local execution of scripts.
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244 (set-buffer (get-buffer-create url-working-buffer))
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245 (erase-buffer)
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246 (string-match "x-exec:/+\\([^/]+\\)\\(/.*\\)" url)
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247 (let ((process-environment process-environment)
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248 (executable (url-match url 1))
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249 (path-info (url-match url 2))
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250 (query-string nil)
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251 (safe-paths url-local-exec-path)
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252 (found nil)
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253 (y nil)
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254 )
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255 (setq url-current-server executable
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256 url-current-file path-info)
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257 (if (string-match "\\(.*\\)\\?\\(.*\\)" path-info)
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258 (setq query-string (url-match path-info 2)
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259 path-info (url-match path-info 1)))
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260 (while (and safe-paths (not found))
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261 (setq y (expand-file-name executable (car safe-paths))
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262 found (and (file-exists-p y) (file-executable-p y) y)
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263 safe-paths (cdr safe-paths)))
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264 (if (not found)
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265 (url-retrieve (concat "www://error/nofile/" executable))
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266 (setq process-environment
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267 (append
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268 (list
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269 "SERVER_SOFTWARE=x-exec/1.0"
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270 (concat "SERVER_NAME=" (system-name))
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271 "GATEWAY_INTERFACE=CGI/1.1"
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272 "SERVER_PROTOCOL=HTTP/1.0"
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273 "SERVER_PORT="
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274 (concat "REQUEST_METHOD=" url-request-method)
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275 (concat "HTTP_ACCEPT="
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276 (mapconcat
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277 (function
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278 (lambda (x)
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279 (cond
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280 ((= x ?\n) (setq y t) "")
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281 ((= x ?:) (setq y nil) ",")
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282 (t (char-to-string x))))) url-mime-accept-string
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283 ""))
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284 (concat "PATH_INFO=" (url-unhex-string path-info))
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285 (concat "PATH_TRANSLATED=" (url-unhex-string path-info))
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286 (concat "SCRIPT_NAME=" executable)
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287 (concat "QUERY_STRING=" (url-unhex-string query-string))
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288 (concat "REMOTE_HOST=" (system-name)))
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289 (if (assoc "content-type" url-request-extra-headers)
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290 (concat "CONTENT_TYPE=" (cdr
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291 (assoc "content-type"
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292 url-request-extra-headers))))
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293 (if url-request-data
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294 (concat "CONTENT_LENGTH=" (length url-request-data)))
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295 process-environment))
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296 (and url-request-data (insert url-request-data))
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297 (setq y (call-process-region (point-min) (point-max) found t t))
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298 (goto-char (point-min))
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299 (delete-region (point) (progn (skip-chars-forward " \t\n") (point)))
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300 (cond
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301 ((url-mime-response-p) nil) ; Its already got an HTTP/1.0 header
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302 ((null y) ; Weird exit status, whassup?
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303 (insert "HTTP/1.0 404 Not Found\n"
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304 "Server: " url-package-name "/x-exec\n"))
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305 ((= 0 y) ; The shell command was successful
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306 (insert "HTTP/1.0 200 Document follows\n"
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307 "Server: " url-package-name "/x-exec\n"))
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308 (t ; Non-zero exit status is bad bad bad
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309 (insert "HTTP/1.0 404 Not Found\n"
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310 "Server: " url-package-name "/x-exec\n"))))))
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311
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312 (provide 'url-misc)
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