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1 ;;; url-misc.el --- Misc Uniform Resource Locator retrieval code
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2 ;; Author: wmperry
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3 ;; Created: 1997/01/21 21:14:56
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4 ;; Version: 1.9
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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 - 1996 by William M. Perry (wmperry@cs.indiana.edu)
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9 ;;; Copyright (c) 1996, 1997 Free Software Foundation, Inc.
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10 ;;;
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11 ;;; This file is not part of GNU Emacs, but the same permissions apply.
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12 ;;;
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13 ;;; GNU Emacs is free software; you can redistribute it and/or modify
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14 ;;; it under the terms of the GNU General Public License as published by
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15 ;;; the Free Software Foundation; either version 2, or (at your option)
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16 ;;; any later version.
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17 ;;;
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18 ;;; GNU Emacs is distributed in the hope that it will be useful,
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19 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 ;;; GNU General Public License for more details.
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22 ;;;
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23 ;;; You should have received a copy of the GNU General Public License
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24 ;;; along with GNU Emacs; see the file COPYING. If not, write to the
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25 ;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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26 ;;; Boston, MA 02111-1307, USA.
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27 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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28
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29 (require 'url-vars)
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30 (require 'url-parse)
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31 (autoload 'Info-goto-node "info" "" t)
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32
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33 (defun url-info (url)
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34 ;; Fetch an info node
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35 (if (get-buffer url-working-buffer)
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36 (kill-buffer url-working-buffer))
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37 (let* ((data (url-generic-parse-url url))
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38 (fname (url-filename data))
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39 (node (or (url-target data) "Top")))
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40 (if (and fname node)
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41 (Info-goto-node (concat "(" fname ")" node))
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42 (error "Malformed url: %s" url))))
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43
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44 (defun url-finger (url)
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45 ;; Find a finger reference
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46 (setq url-current-mime-headers '(("content-type" . "text/html"))
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47 url-current-mime-type "text/html")
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48 (set-buffer (get-buffer-create url-working-buffer))
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49 (let* ((urlobj (if (vectorp url) url
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50 (url-generic-parse-url url)))
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51 (host (or (url-host urlobj) "localhost"))
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52 (port (or (url-port urlobj)
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53 (cdr-safe (assoc "finger" url-default-ports))))
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54 (user (url-unhex-string (url-filename urlobj)))
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55 (proc (url-open-stream "finger" url-working-buffer host
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56 (string-to-int port))))
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57 (if (stringp proc)
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58 (message "%s" proc)
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59 (process-kill-without-query proc)
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60 (if (= (string-to-char user) ?/)
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61 (setq user (substring user 1 nil)))
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62 (goto-char (point-min))
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63 (insert "<html>\n"
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64 " <head>\n"
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65 " <title>Finger information for " user "@" host "</title>\n"
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66 " </head>\n"
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67 " <body>\n"
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68 " <h1>Finger information for " user "@" host "</h1>\n"
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69 " <hr>\n"
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70 " <pre>\n")
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71 (process-send-string proc (concat user "\r\n"))
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72 (while (memq (url-process-status proc) '(run open))
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73 (url-after-change-function)
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74 (url-accept-process-output proc))
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75 (goto-char (point-min))
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76 (url-replace-regexp "^Process .* exited .*code .*$" "")
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77 (goto-char (point-max))
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78 (insert " </pre>\n"
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79 " </body>\n"
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80 "</html>\n"))))
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81
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82 (defun url-do-terminal-emulator (type server port user)
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83 (terminal-emulator
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84 (generate-new-buffer (format "%s%s" (if user (concat user "@") "") server))
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85 (case type
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86 (rlogin "rlogin")
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87 (telnet "telnet")
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88 (tn3270 "tn3270")
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89 (otherwise
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90 (error "Unknown terminal emulator required: %s" type)))
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91 (if user
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92 (case type
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93 (rlogin
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94 (list server "-l" user))
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95 (telnet
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96 (if user (message "Please log in as user: %s" user))
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97 (if port
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98 (list server port)
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99 (list server)))
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100 (tn3270
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101 (if user (message "Please log in as user: %s" user))
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102 (list server))))))
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103
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104 (defun url-generic-emulator-loader (url)
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105 (if (get-buffer url-working-buffer)
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106 (kill-buffer url-working-buffer))
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107 (or (string-match "^\\([^:]+\\):/*\\(.*@\\)*\\([^/]*\\)/*" url)
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108 (error "Invalid URL: %s" url))
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109 (let* ((type (intern (downcase (match-string 1 url))))
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110 (server (match-string 3 url))
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111 (name (if (match-beginning 2)
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112 (substring url (match-beginning 2) (1- (match-end 2)))))
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113 (port (if (string-match ":" server)
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114 (prog1
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115 (substring server (match-end 0))
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116 (setq server (substring server 0 (match-beginning 0)))))))
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117 (url-do-terminal-emulator type server port name)))
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118
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119 (fset 'url-rlogin 'url-generic-emulator-loader)
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120 (fset 'url-telnet 'url-generic-emulator-loader)
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121 (fset 'url-tn3270 'url-generic-emulator-loader)
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122
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123 (defun url-proxy (url)
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124 ;; Retrieve URL from a proxy.
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125 ;; Expects `url-using-proxy' to be bound to the specific proxy to use."
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126 (let (
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127 (urlobj (url-generic-parse-url url))
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128 (proxyobj (url-generic-parse-url url-using-proxy)))
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129 (url-http url-using-proxy url)
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130 (setq url-current-type (url-type urlobj)
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131 url-current-user (url-user urlobj)
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132 url-current-port (or (url-port urlobj)
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133 (cdr-safe (assoc url-current-type
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134 url-default-ports)))
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135 url-current-server (url-host urlobj)
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136 url-current-file (url-filename urlobj))))
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137
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138 (defun url-x-exec (url)
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139 ;; Handle local execution of scripts.
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140 (set-buffer (get-buffer-create url-working-buffer))
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141 (erase-buffer)
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142 (string-match "x-exec:/+\\([^/]+\\)\\(/.*\\)" url)
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143 (let ((process-environment process-environment)
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144 (executable (url-match url 1))
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145 (path-info (url-match url 2))
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146 (query-string nil)
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147 (safe-paths url-local-exec-path)
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148 (found nil)
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149 (y nil)
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150 )
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151 (setq url-current-server executable
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152 url-current-file path-info)
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153 (if (string-match "\\(.*\\)\\?\\(.*\\)" path-info)
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154 (setq query-string (url-match path-info 2)
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155 path-info (url-match path-info 1)))
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156 (while (and safe-paths (not found))
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157 (setq y (expand-file-name executable (car safe-paths))
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158 found (and (file-exists-p y) (file-executable-p y) y)
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159 safe-paths (cdr safe-paths)))
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160 (if (not found)
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161 (url-retrieve (concat "www://error/nofile/" executable))
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162 (setq process-environment
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163 (append
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164 (list
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165 "SERVER_SOFTWARE=x-exec/1.0"
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166 (concat "SERVER_NAME=" (system-name))
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167 "GATEWAY_INTERFACE=CGI/1.1"
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168 "SERVER_PROTOCOL=HTTP/1.0"
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169 "SERVER_PORT="
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170 (concat "REQUEST_METHOD=" url-request-method)
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171 (concat "HTTP_ACCEPT="
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172 (mapconcat
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173 (function
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174 (lambda (x)
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175 (cond
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176 ((= x ?\n) (setq y t) "")
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177 ((= x ?:) (setq y nil) ",")
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178 (t (char-to-string x))))) url-mime-accept-string
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179 ""))
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180 (concat "PATH_INFO=" (url-unhex-string path-info))
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181 (concat "PATH_TRANSLATED=" (url-unhex-string path-info))
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182 (concat "SCRIPT_NAME=" executable)
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183 (concat "QUERY_STRING=" (url-unhex-string query-string))
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184 (concat "REMOTE_HOST=" (system-name)))
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185 (if (assoc "content-type" url-request-extra-headers)
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186 (concat "CONTENT_TYPE=" (cdr
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187 (assoc "content-type"
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188 url-request-extra-headers))))
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189 (if url-request-data
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190 (concat "CONTENT_LENGTH=" (length url-request-data)))
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191 process-environment))
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192 (and url-request-data (insert url-request-data))
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193 (setq y (call-process-region (point-min) (point-max) found t t))
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194 (goto-char (point-min))
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195 (delete-region (point) (progn (skip-chars-forward " \t\n") (point)))
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196 (cond
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197 ((url-mime-response-p) nil) ; Its already got an HTTP/1.0 header
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198 ((null y) ; Weird exit status, whassup?
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199 (insert "HTTP/1.0 404 Not Found\n"
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200 "Server: " url-package-name "/x-exec\n"))
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201 ((= 0 y) ; The shell command was successful
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202 (insert "HTTP/1.0 200 Document follows\n"
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203 "Server: " url-package-name "/x-exec\n"))
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204 (t ; Non-zero exit status is bad bad bad
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205 (insert "HTTP/1.0 404 Not Found\n"
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206 "Server: " url-package-name "/x-exec\n"))))))
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207
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208 ;; ftp://ietf.org/internet-drafts/draft-masinter-url-data-02.txt
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209 (defun url-data (url)
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210 (set-buffer (get-buffer-create url-working-buffer))
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211 (let ((content-type nil)
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212 (encoding nil)
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213 (data nil))
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214 (cond
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215 ((string-match "^data:\\([^;,]*\\);*\\([^,]*\\)," url)
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216 (setq content-type (match-string 1 url)
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217 encoding (match-string 2 url)
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218 data (url-unhex-string (substring url (match-end 0))))
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219 (if (= 0 (length content-type)) (setq content-type "text/plain"))
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220 (if (= 0 (length encoding)) (setq encoding "8bit")))
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221 (t nil))
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222 (setq url-current-content-length (length data)
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223 url-current-mime-type content-type
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224 url-current-mime-encoding encoding
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225 url-current-mime-headers (list (cons "content-type" content-type)
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226 (cons "content-encoding" encoding)))
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227 (and data (insert data))))
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228
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229 (provide 'url-misc)
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