1 | # ---------------------------------------------------------------------- |
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2 | # COMPONENT: filexfer - support for file transfer with user's desktop |
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3 | # |
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4 | # This part supports the filexfer Java component that enables Rappture |
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5 | # to transfer files to and from the user's desktop. It acts as a |
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6 | # web server. When a Rappture application starts up, the user gets |
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7 | # a Web page that has an embedded VNC applet and the filexfer applet. |
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8 | # The Web page connects back to this server, which acts like a Web |
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9 | # server and delivers up the filexfer applet. Then, the applet |
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10 | # connects back to the same server and stays in contact with the |
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11 | # Rappture application. Whenever Rappture needs to deliver a file |
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12 | # to the user, it sends a message to the applet, which pops up a |
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13 | # Web page that connects back to the Rappture application and pulls |
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14 | # down the file. When the user wants to upload a file, Rappture |
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15 | # again sends a message to the applet, which presents a Web form |
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16 | # and posts the file to the Rappture server. |
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17 | # ====================================================================== |
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18 | # AUTHOR: Michael McLennan, Purdue University |
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19 | # Copyright (c) 2004-2005 Purdue Research Foundation |
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20 | # |
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21 | # See the file "license.terms" for information on usage and |
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22 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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23 | # ====================================================================== |
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24 | package require Itcl |
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25 | |
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26 | namespace eval Rappture { # forward declaration } |
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27 | namespace eval Rappture::filexfer { |
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28 | variable enabled 0 ;# set to 1 when this is running |
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29 | variable port 0 ;# start server on this port |
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30 | variable cookie "" ;# magic cookie for applet auth |
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31 | variable restrictClientAddress "" ;# allow clients only from this addr |
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32 | variable clients ;# maps client socket => status |
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33 | variable buffer ;# request buffer for each client |
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34 | variable access ;# maps spooled file => access cookie |
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35 | variable uploadcmds ;# callbacks for upload forms |
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36 | |
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37 | variable sitelogo "" ;# HTML for site logo in upload form |
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38 | variable stylesheet "" ;# URL for stylesheet address |
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39 | |
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40 | # used to generate cookies -- see bakeCookie for details |
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41 | variable cookieChars { |
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42 | a b c d e f g h i j k l m n o p q r s t u v w x y z |
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43 | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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44 | 0 1 2 3 4 5 6 7 8 9 |
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45 | } |
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46 | |
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47 | # maps client socket => socket protocol |
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48 | # if it doesn't match, we warn user to restart the browser |
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49 | variable protocol |
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50 | set protocol(current) "1.0" |
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51 | |
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52 | # |
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53 | # Translates mime type => file extension |
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54 | # and file extension => mime type |
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55 | # |
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56 | # Used primarily for spooling data files. |
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57 | # |
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58 | variable mime2ext |
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59 | variable ext2mime |
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60 | variable mime2type |
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61 | |
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62 | foreach {mtype ext type} { |
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63 | text/plain .txt ascii |
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64 | text/html .html ascii |
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65 | image/gif .gif binary |
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66 | image/jpeg .jpg binary |
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67 | application/postscript .ps ascii |
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68 | application/pdf .pdf binary |
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69 | application/octet-stream .jar binary |
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70 | application/octet-stream .class binary |
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71 | } { |
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72 | set mime2ext($mtype) $ext |
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73 | set ext2mime($ext) $mtype |
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74 | set mime2type($mtype) $type |
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75 | } |
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76 | |
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77 | } |
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78 | |
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79 | # must use this name -- plugs into Rappture::resources::load |
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80 | proc filexfer_init_resources {} { |
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81 | Rappture::resources::register \ |
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82 | filexfer_port Rappture::filexfer::option_port \ |
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83 | filexfer_cookie Rappture::filexfer::option_cookie \ |
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84 | filexfer_sitelogo Rappture::filexfer::option_sitelogo \ |
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85 | filexfer_stylesheet Rappture::filexfer::option_stylesheet |
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86 | } |
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87 | |
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88 | # ---------------------------------------------------------------------- |
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89 | # USAGE: Rappture::filexfer::init |
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90 | # |
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91 | # Called in the main application to start listening to a particular |
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92 | # port and start acting like a filexfer server. Returns 1 if the |
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93 | # server was enabled, and 0 otherwise. |
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94 | # ---------------------------------------------------------------------- |
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95 | proc Rappture::filexfer::init {} { |
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96 | variable enabled |
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97 | variable port |
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98 | variable clients |
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99 | |
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100 | # keep a list of most recently activated clients |
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101 | set clients(order) "" |
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102 | |
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103 | # |
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104 | # The port setting should have been set properly in the |
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105 | # "resources" file loaded at the beginning of the app. |
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106 | # If it wasn't, then don't do any filexfer. |
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107 | # |
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108 | if {$port > 0} { |
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109 | # |
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110 | # If the prescribed port is busy, then exit with a special |
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111 | # status code so the middleware knows to try again with another |
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112 | # port. |
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113 | # |
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114 | # OH NO! THE DREADED ERROR CODE 9! |
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115 | # |
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116 | if {[catch {socket -server Rappture::filexfer::accept $port}]} { |
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117 | exit 9 |
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118 | } |
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119 | set enabled 1 |
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120 | |
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121 | # |
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122 | # Clean up all spooled files when this program shuts down. |
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123 | # If we're running on nanoHUB, we'll get a SIGHUP signal |
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124 | # when it's time to quit. On the desktop, we'll get a |
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125 | # <Destroy> event on the main window. |
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126 | # |
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127 | Rappture::signal SIGHUP filexfer Rappture::filexfer::cleanup |
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128 | |
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129 | bind RapptureFilexfer <Destroy> Rappture::filexfer::cleanup |
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130 | set btags [bindtags .] |
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131 | set i [lsearch $btags RapptureFilexfer] |
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132 | if {$i < 0} { |
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133 | set btags [linsert $btags 0 RapptureFilexfer] |
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134 | bindtags . $btags |
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135 | } |
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136 | } |
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137 | return $enabled |
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138 | } |
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139 | |
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140 | # ---------------------------------------------------------------------- |
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141 | # USAGE: Rappture::filexfer::enabled |
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142 | # |
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143 | # Clients use this to see if the filexfer stuff is up and running. |
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144 | # If so, then the GUI will provide "Download..." and other filexfer |
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145 | # options. If not, then Rappture must be running within an |
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146 | # environment that doesn't support it. |
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147 | # ---------------------------------------------------------------------- |
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148 | proc Rappture::filexfer::enabled {} { |
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149 | variable enabled |
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150 | return $enabled |
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151 | } |
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152 | |
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153 | # ---------------------------------------------------------------------- |
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154 | # USAGE: Rappture::filexfer::spool <string> ?<filename>? |
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155 | # |
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156 | # Clients use this to send a file off to the user. The <string> |
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157 | # is stored in a file called <filename> in the user's spool directory. |
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158 | # If there is already a file by that name, then the name is modified |
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159 | # to make it unique. Once the string has been stored in the file, |
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160 | # a message is sent to all clients listening, letting them know |
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161 | # that the file is available. |
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162 | # ---------------------------------------------------------------------- |
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163 | proc Rappture::filexfer::spool {string {filename "output.txt"}} { |
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164 | global env |
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165 | variable enabled |
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166 | variable clients |
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167 | variable protocol |
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168 | variable access |
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169 | |
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170 | if {$enabled} { |
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171 | # make a spool directory, if we don't have one already |
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172 | set dir ~/data/sessions/$env(SESSION)/spool |
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173 | if {![file exists $dir]} { |
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174 | catch {file mkdir $dir} |
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175 | } |
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176 | |
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177 | if {[file exists [file join $dir $filename]]} { |
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178 | # |
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179 | # Find a similar file name that doesn't conflict |
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180 | # with an existing file: e.g., output2.txt |
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181 | # |
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182 | set root [file rootname $filename] |
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183 | set ext [file extension $filename] |
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184 | set counter 2 |
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185 | while {1} { |
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186 | set filename "$root$counter$ext" |
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187 | if {![file exists [file join $dir $filename]]} { |
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188 | break |
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189 | } |
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190 | incr counter |
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191 | } |
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192 | } |
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193 | |
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194 | set fid [open [file join $dir $filename] w] |
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195 | fconfigure $fid -encoding binary -translation binary |
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196 | puts -nonewline $fid $string |
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197 | close $fid |
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198 | |
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199 | set sent 0 |
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200 | set protoproblems 0 |
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201 | set access($filename) [bakeCookie] |
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202 | foreach cid $clients(order) { |
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203 | if {[info exists clients($cid)] && $clients($cid)} { |
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204 | if {![string equal $protocol($cid) $protocol(current)]} { |
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205 | incr protoproblems |
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206 | } |
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207 | catch { |
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208 | puts $cid [format "url /spool/%s/%s?access=%s" \ |
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209 | $env(SESSION) $filename $access($filename)] |
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210 | } |
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211 | set sent 1 |
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212 | } |
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213 | } |
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214 | if {!$sent} { |
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215 | error "no clients" |
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216 | } |
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217 | if {$protoproblems == 1} { |
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218 | error "old client" |
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219 | } elseif {$protoproblems > 1} { |
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220 | error "old clients" |
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221 | } |
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222 | } |
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223 | } |
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224 | |
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225 | # ---------------------------------------------------------------------- |
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226 | # USAGE: Rappture::filexfer::upload <description> <callback> |
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227 | # |
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228 | # Clients use this to prompt the user to upload a file. The string |
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229 | # <description> is sent to the user in a web form, and the user is |
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230 | # given the opportunity to upload a file. If successful, the |
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231 | # <callback> is invoked to handle the uploaded information. |
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232 | # ---------------------------------------------------------------------- |
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233 | proc Rappture::filexfer::upload {desc callback} { |
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234 | variable enabled |
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235 | variable sitelogo |
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236 | variable stylesheet |
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237 | variable uploadcmds |
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238 | |
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239 | if {$enabled} { |
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240 | set file [file join $RapptureGUI::library filexfer upload.html] |
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241 | set fid [open $file r] |
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242 | set html [read $fid] |
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243 | close $fid |
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244 | |
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245 | set cookie [bakeCookie] |
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246 | set uploadcmds($cookie) $callback |
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247 | |
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248 | set style "" |
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249 | if {"" != $stylesheet} { |
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250 | set style "<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" href=\"$stylesheet\"/>" |
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251 | } |
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252 | |
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253 | set html [string map [list \ |
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254 | @COOKIE@ $cookie \ |
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255 | @DESCRIPTION@ $desc \ |
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256 | @LOGO@ $sitelogo \ |
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257 | @STYLESHEET@ $style \ |
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258 | ] $html] |
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259 | |
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260 | spool $html upload.html |
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261 | } |
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262 | } |
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263 | |
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264 | # ---------------------------------------------------------------------- |
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265 | # USAGE: Rappture::filexfer::cleanup |
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266 | # |
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267 | # Called when the application is shutting down to clean up |
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268 | # port and start acting like a filexfer server. Returns 1 if the |
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269 | # server was enabled, and 0 otherwise. |
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270 | # ---------------------------------------------------------------------- |
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271 | proc Rappture::filexfer::cleanup {} { |
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272 | global env |
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273 | set spool [file join ~/data/sessions $env(SESSION) spool] |
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274 | file delete -force $spool |
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275 | } |
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276 | |
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277 | # ---------------------------------------------------------------------- |
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278 | # USAGE: Rappture::filexfer::accept <clientId> <address> <port> |
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279 | # |
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280 | # Invoked automatically whenever a client tries to connect to this |
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281 | # server. Validates the client's incoming <address> and sets up |
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282 | # callbacks to handle further communication. |
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283 | # ---------------------------------------------------------------------- |
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284 | proc Rappture::filexfer::accept {cid addr port} { |
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285 | variable restrictClientAddress |
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286 | |
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287 | # |
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288 | # If the client comes from anywhere but the restricted host, |
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289 | # then deny the connection. We should be getting connections |
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290 | # only from within the firewall around our own system. |
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291 | # |
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292 | if {"" != $restrictClientAddress |
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293 | && ![string equal $addr $restrictClientAddress]} { |
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294 | close $cid |
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295 | } else { |
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296 | fileevent $cid readable [list Rappture::filexfer::handler $cid] |
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297 | # |
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298 | # Use binary mode for both input and output, so the |
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299 | # byte counts (as in Content-Length:) are correct. |
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300 | # |
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301 | fconfigure $cid -buffering line -translation binary |
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302 | } |
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303 | } |
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304 | |
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305 | # ---------------------------------------------------------------------- |
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306 | # USAGE: Rappture::filexfer::handler <clientId> |
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307 | # |
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308 | # Invoked automatically whenever a message comes in from a client |
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309 | # to handle the message. |
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310 | # ---------------------------------------------------------------------- |
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311 | proc Rappture::filexfer::handler {cid} { |
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312 | variable buffer |
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313 | |
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314 | if {[gets $cid line] < 0} { |
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315 | # eof from client -- clean up |
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316 | shutdown $cid |
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317 | } else { |
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318 | # clip out trailing carriage returns |
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319 | regsub -all {\r$} $line "" line |
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320 | |
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321 | # |
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322 | # Is the first line of the request? Then make sure |
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323 | # that it's properly formed. |
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324 | # |
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325 | if {![info exists buffer($cid)] |
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326 | && [regexp {^ *[A-Z]+ +[^ ]+ +HTTP/1\.[01]$} $line]} { |
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327 | set buffer($cid) $line |
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328 | return ;# wait for more lines to dribble in... |
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329 | } elseif {[info exists buffer($cid)]} { |
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330 | set line [string trim $line] |
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331 | if {"" == $line} { |
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332 | regexp {^ *([A-Z]+) +} $buffer($cid) match type |
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333 | if {$type == "POST"} { |
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334 | if {[regexp {Content-Length: *([0-9]+)} $buffer($cid) match len]} { |
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335 | set buffer($cid-post) [read $cid $len] |
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336 | } |
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337 | # finished post... process below... |
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338 | } else { |
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339 | # finished get or other op... process below... |
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340 | } |
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341 | } else { |
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342 | append buffer($cid) "\n" $line |
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343 | return |
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344 | } |
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345 | # blank line -- process below... |
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346 | } elseif {[regexp { +RAPPTURE(/[0-9\.]+)?$} $line]} { |
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347 | set buffer($cid) $line |
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348 | # special Rappture request -- process below... |
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349 | } else { |
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350 | response $cid error -message "Your browser sent a request that this server could not understand.<P>Malformed request: $line" |
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351 | shutdown $cid |
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352 | return |
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353 | } |
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354 | |
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355 | # |
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356 | # We've seen a blank line at the end of a request. |
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357 | # Time to process it... |
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358 | # |
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359 | set errmsg "" |
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360 | set lines [split $buffer($cid) \n] |
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361 | unset buffer($cid) |
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362 | set headers(Connection) close |
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363 | |
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364 | # extract the TYPE and URL from the request line |
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365 | set line [lindex $lines 0] |
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366 | set lines [lrange $lines 1 end] |
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367 | if {![regexp {^ *([A-Z]+) +([^ ]+) +(HTTP/1\.[01])$} $line \ |
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368 | match type url proto] |
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369 | && ![regexp { +(RAPPTURE(/[0-9\.]+)?)$} $line match proto]} { |
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370 | set errmsg "Malformed request: $line" |
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371 | } |
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372 | |
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373 | if {[string match HTTP/* $proto]} { |
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374 | # |
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375 | # HANDLE HTTP/1.x REQUESTS... |
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376 | # |
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377 | while {"" == $errmsg && [llength $lines] > 0} { |
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378 | # extract the "Header: value" lines |
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379 | set line [lindex $lines 0] |
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380 | set lines [lrange $lines 1 end] |
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381 | |
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382 | if {[regexp {^ *([-a-zA-Z0-9_]+): *(.*)} $line \ |
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383 | match key val]} { |
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384 | set headers($key) $val |
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385 | } else { |
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386 | set errmsg [format "Request header field is missing colon separator.<P>\n<PRE>\n%s</PRE>" $line] |
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387 | } |
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388 | } |
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389 | |
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390 | if {"" != $errmsg} { |
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391 | # errors in the header |
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392 | response $cid header -status "400 Bad Request" \ |
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393 | -connection $headers(Connection) |
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394 | response $cid error -message "Your browser sent a request that this server could not understand.<P>$errmsg" |
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395 | } else { |
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396 | # process the request... |
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397 | switch -- $type { |
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398 | GET { |
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399 | request_GET $cid $url headers |
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400 | } |
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401 | POST { |
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402 | set postdata "" |
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403 | if {[info exists buffer($cid-post)]} { |
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404 | set postdata $buffer($cid-post) |
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405 | unset buffer($cid-post) |
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406 | } |
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407 | request_POST $cid $url headers $postdata |
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408 | } |
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409 | default { |
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410 | response $cid header \ |
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411 | -status "400 Bad Request" \ |
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412 | -connection $headers(Connection) |
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413 | response $cid error -message "Your browser sent a request that this server could not understand.<P>Invalid request type <b>$type</b>" |
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414 | } |
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415 | } |
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416 | } |
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417 | if {$headers(Connection) == "close"} { |
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418 | shutdown $cid |
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419 | } |
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420 | } elseif {[string match RAPPTURE* $proto]} { |
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421 | # |
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422 | # HANDLE SPECIAL RAPPTURE REQUESTS... |
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423 | # |
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424 | set vers "0.0" |
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425 | if {[regexp {^ *(REGISTER) +([^ ]+) +([^ ]+) +([^ ]+) +RAPPTURE(/[0-9\.]+)?$} \ |
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426 | $line match type user addr cookie vers]} { |
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427 | set vers [string trimleft $vers /] |
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428 | request_REGISTER $cid $user $addr $cookie $vers |
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429 | } elseif {[regexp {^ *UNREGISTER +RAPPTURE$} $line]} { |
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430 | request_UNREGISTER $cid |
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431 | } elseif {[regexp {^ *ACTIVATE +RAPPTURE$} $line]} { |
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432 | request_ACTIVATE $cid |
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433 | } elseif {[regexp {^ *DEACTIVATE +RAPPTURE$} $line]} { |
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434 | request_DEACTIVATE $cid |
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435 | } else { |
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436 | response $cid header \ |
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437 | -status "400 Bad Request" \ |
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438 | -connection $headers(Connection) |
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439 | response $cid error -message "Your browser sent a request that this server could not understand.<P>Invalid request type <b>$type</b>" |
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440 | } |
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441 | } |
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442 | } |
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443 | } |
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444 | |
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445 | # ---------------------------------------------------------------------- |
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446 | # USAGE: Rappture::filexfer::request_GET <clientId> <url> <headerVar> |
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447 | # |
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448 | # Used internally to handle GET requests on this server. Looks for |
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449 | # the requested <url> and sends it back to <clientId> according to |
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450 | # the headers in the <headerVar> array in the calling scope. |
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451 | # ---------------------------------------------------------------------- |
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452 | proc Rappture::filexfer::request_GET {cid url headerVar} { |
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453 | global env |
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454 | variable access |
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455 | upvar $headerVar headers |
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456 | |
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457 | # |
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458 | # Look for any ?foo=1&bar=2 data embedded in the URL... |
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459 | # |
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460 | if {[regexp -indices {\?[a-zA-Z0-9_]+\=} $url match]} { |
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461 | foreach {s0 s1} $match break |
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462 | set args [string range $url [expr {$s0+1}] end] |
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463 | set url [string range $url 0 [expr {$s0-1}]] |
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464 | |
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465 | foreach part [split $args &] { |
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466 | if {[llength [split $part =]] == 2} { |
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467 | foreach {key val} [split $part =] break |
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468 | set post($key) [urlDecode $val] |
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469 | } |
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470 | } |
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471 | } |
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472 | |
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473 | # |
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474 | # Interpret the URL and fulfill the request... |
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475 | # |
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476 | if {$url == "/debug" && [info exists env(FILEXFER_DEBUG)]} { |
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477 | variable port |
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478 | variable cookie |
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479 | # |
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480 | # DEBUG MODE: Put out a web page containing the applet |
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481 | # and parameters needed to drive this. Allow only |
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482 | # if the FILEXFER_DEBUG environment variable is set. |
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483 | # |
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484 | response $cid header \ |
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485 | -status "200 OK" \ |
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486 | -connection $headers(Connection) |
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487 | set s [clock seconds] |
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488 | set date [clock format $s -format {%a, %d %b %Y %H:%M:%S %Z}] |
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489 | puts $cid "Last-Modified: $date" |
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490 | |
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491 | set user "???" |
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492 | foreach var {USER USERNAME LOGNAME} { |
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493 | if {[info exists env($var)]} { |
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494 | set user $env($var) |
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495 | break |
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496 | } |
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497 | } |
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498 | |
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499 | response $cid body -type text/html -string [format {<html> |
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500 | <head><title>Rappture::filexfer Debug Page</title></head> |
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501 | <body BGCOLOR=White> |
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502 | This page contains the same Java applet that the nanoHUB includes |
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503 | on each Rappture tool page. The applet connects back to the |
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504 | Rappture application and listens for file transfer requests |
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505 | coming from the user. |
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506 | <p> |
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507 | <applet CODE="filexfer.class" ARCHIVE="filexfer.jar" width=300 height=200> |
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508 | <param name="port" value="%s"> |
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509 | <param name="user" value="%s"> |
---|
510 | <param name="cookie" value="%s"> |
---|
511 | </applet> |
---|
512 | </body> |
---|
513 | </html> |
---|
514 | } $port $user $cookie] |
---|
515 | } elseif {[regexp {^/?spool\/([^/]+)/(.+)$} $url match session tail]} { |
---|
516 | # |
---|
517 | # Send back a spooled file... |
---|
518 | # |
---|
519 | set file [file join ~/data/sessions $session spool $tail] |
---|
520 | set fname [file tail $file] |
---|
521 | |
---|
522 | if {![info exists access($fname)]} { |
---|
523 | response $cid header -status "404 Not Found" |
---|
524 | response $cid error -status "404 Not Found" -message "The requested file <b>$fname</b> is missing. It may have already been downloaded to your desktop. You cannot refresh it from the same URL, for security reasons.<p>Instead, download the file again by going back to the original application." |
---|
525 | } elseif {![info exists post(access)] |
---|
526 | || ![string equal $post(access) $access($fname)]} { |
---|
527 | response $cid header -status "401 Unauthorized" |
---|
528 | response $cid error -status "401 Unauthorized" -message "You do not have the proper credentials to access file $fname." |
---|
529 | } else { |
---|
530 | response $cid file -path $file -connection $headers(Connection) |
---|
531 | } |
---|
532 | } elseif {[regexp {^/?[a-zA-Z0-9_]+\.[a-zA-Z]+$} $url match]} { |
---|
533 | # |
---|
534 | # Send back an applet file... |
---|
535 | # |
---|
536 | set url [string trimleft $url /] |
---|
537 | set file [file join $RapptureGUI::library filexfer $url] |
---|
538 | response $cid file -path $file -connection $headers(Connection) |
---|
539 | } else { |
---|
540 | # |
---|
541 | # BAD FILE REQUEST: |
---|
542 | # The user is trying to ask for a file outside of |
---|
543 | # the normal filexfer installation. Treat it the |
---|
544 | # same as file not found. |
---|
545 | response $cid header \ |
---|
546 | -status "404 Not Found" \ |
---|
547 | -connection $headers(Connection) |
---|
548 | response $cid error -status "404 Not Found" -message "The requested URL $url was not found on this server." |
---|
549 | } |
---|
550 | } |
---|
551 | |
---|
552 | # ---------------------------------------------------------------------- |
---|
553 | # USAGE: Rappture::filexfer::request_POST <clientId> <url> \ |
---|
554 | # <headerVar> <postdata> |
---|
555 | # |
---|
556 | # Used internally to handle POST requests on this server. Looks for |
---|
557 | # the requested <url> and sends it back to <clientId> according to |
---|
558 | # the headers in the <headerVar> array in the calling scope. |
---|
559 | # ---------------------------------------------------------------------- |
---|
560 | proc Rappture::filexfer::request_POST {cid url headerVar postData} { |
---|
561 | global env |
---|
562 | variable access |
---|
563 | upvar $headerVar headers |
---|
564 | |
---|
565 | # |
---|
566 | # Look for any ?foo=1&bar=2 data embedded in the URL... |
---|
567 | # |
---|
568 | if {[regexp -indices {\?[a-zA-Z0-9_]+\=} $url match]} { |
---|
569 | foreach {s0 s1} $match break |
---|
570 | set args [string range $url [expr {$s0+1}] end] |
---|
571 | set url [string range $url 0 [expr {$s0-1}]] |
---|
572 | |
---|
573 | foreach part [split $args &] { |
---|
574 | if {[llength [split $part =]] == 2} { |
---|
575 | foreach {key val} [split $part =] break |
---|
576 | set post($key) [urlDecode $val] |
---|
577 | } |
---|
578 | } |
---|
579 | } elseif {[string length $postData] > 0} { |
---|
580 | # |
---|
581 | # If we have explicit POST data, then it is one of two |
---|
582 | # kinds. It is either key=value&key=value&... or a |
---|
583 | # multipart key/value assignment with -------boundary |
---|
584 | # separators. |
---|
585 | # |
---|
586 | set part "single" |
---|
587 | if {[info exists headers(Content-Type)]} { |
---|
588 | set data $headers(Content-Type) |
---|
589 | regsub -all { *; *} $data "\n" data |
---|
590 | set type [lindex [split $data \n] 0] |
---|
591 | if {$type == "multipart/form-data"} { |
---|
592 | set part "multi" |
---|
593 | foreach assmt [lrange [split $data \n] 1 end] { |
---|
594 | foreach {key val} [split $assmt =] break |
---|
595 | if {$key == "boundary"} { |
---|
596 | set boundary [string trimleft $val -] |
---|
597 | } |
---|
598 | } |
---|
599 | } |
---|
600 | } |
---|
601 | |
---|
602 | switch -- $part { |
---|
603 | single { |
---|
604 | # simple key=value&key=value&... case |
---|
605 | foreach assmt [split $postData &] { |
---|
606 | if {[regexp {([^=]+)=(.*)} $assmt match key val]} { |
---|
607 | set post($key) [urlDecode $val] |
---|
608 | } |
---|
609 | } |
---|
610 | } |
---|
611 | multi { |
---|
612 | # |
---|
613 | # Multipart data: |
---|
614 | # ----------------------------406765868666254505654602083 |
---|
615 | # Content-Disposition: form-data; name="key" |
---|
616 | # |
---|
617 | # value |
---|
618 | # ----------------------------406765868666254505654602083 |
---|
619 | # ... |
---|
620 | # |
---|
621 | regsub -all {\r\n} $postData "\n" postData |
---|
622 | set state "starting" |
---|
623 | foreach line [split $postData \n] { |
---|
624 | switch $state { |
---|
625 | starting { |
---|
626 | if {[regexp "^-+$boundary" $line]} { |
---|
627 | catch {unset element} |
---|
628 | set state "header" |
---|
629 | } |
---|
630 | } |
---|
631 | header { |
---|
632 | if {"" == $line} { |
---|
633 | set state "body" |
---|
634 | } else { |
---|
635 | if {[regexp {Content-Disposition:} $line]} { |
---|
636 | regsub -all { *; *} $line "\n" line |
---|
637 | foreach assmt [lrange [split $line \n] 1 end] { |
---|
638 | foreach {key val} [split $assmt =] break |
---|
639 | set element($key) [string trim $val \"] |
---|
640 | } |
---|
641 | } |
---|
642 | } |
---|
643 | } |
---|
644 | body { |
---|
645 | if {[regexp "^-+$boundary" $line]} { |
---|
646 | if {[info exists element(name)]} { |
---|
647 | set post($element(name)) $element(data) |
---|
648 | } |
---|
649 | catch {unset element} |
---|
650 | set state "header" |
---|
651 | } else { |
---|
652 | if {[info exists element(data)]} { |
---|
653 | append element(data) "\n" |
---|
654 | } |
---|
655 | append element(data) $line |
---|
656 | } |
---|
657 | } |
---|
658 | default { |
---|
659 | error "unknown state $state in post data" |
---|
660 | } |
---|
661 | } |
---|
662 | } |
---|
663 | } |
---|
664 | default { |
---|
665 | error "unknown content type" |
---|
666 | } |
---|
667 | } |
---|
668 | } |
---|
669 | |
---|
670 | # |
---|
671 | # Interpret the URL and fulfill the request... |
---|
672 | # |
---|
673 | if {$url == "/upload"} { |
---|
674 | variable port |
---|
675 | variable cookie |
---|
676 | variable uploadcmds |
---|
677 | |
---|
678 | if {[info exists post(callback)] |
---|
679 | && [info exists uploadcmds($post(callback))]} { |
---|
680 | # get the data -- either text or file |
---|
681 | set dlist [list which $post(which)] |
---|
682 | lappend dlist data $post($post(which)) |
---|
683 | |
---|
684 | # get the upload callback command |
---|
685 | set cmd $uploadcmds($post(callback)) |
---|
686 | if {[catch "$cmd $dlist" result]} { |
---|
687 | bgerror $result |
---|
688 | } |
---|
689 | unset uploadcmds($post(callback)) |
---|
690 | } |
---|
691 | |
---|
692 | # |
---|
693 | # Send back a response that closes the window that |
---|
694 | # posted this form. |
---|
695 | # |
---|
696 | response $cid header -status "200 OK" \ |
---|
697 | -connection $headers(Connection) |
---|
698 | set s [clock seconds] |
---|
699 | set date [clock format $s -format {%a, %d %b %Y %H:%M:%S %Z}] |
---|
700 | puts $cid "Last-Modified: $date" |
---|
701 | response $cid body -type text/html -string {<html> |
---|
702 | <head> |
---|
703 | <title>Upload Complete</title> |
---|
704 | <script language="JavaScript"> |
---|
705 | function setup() { |
---|
706 | window.close() |
---|
707 | } |
---|
708 | window.onload = setup; |
---|
709 | </script> |
---|
710 | </head> |
---|
711 | <body> |
---|
712 | <b>Data uploaded successfully. This window will now close.</b><br/> |
---|
713 | If this window doesn't close automatically, feel free to close it manually. |
---|
714 | </body> |
---|
715 | </html>} |
---|
716 | } else { |
---|
717 | # |
---|
718 | # BAD FILE REQUEST: |
---|
719 | # The user is trying to ask for a file outside of |
---|
720 | # the normal filexfer installation. Treat it the |
---|
721 | # same as file not found. |
---|
722 | response $cid header \ |
---|
723 | -status "404 Not Found" \ |
---|
724 | -connection $headers(Connection) |
---|
725 | response $cid error -status "404 Not Found" -message "The requested URL $url was not found on this server." |
---|
726 | } |
---|
727 | } |
---|
728 | |
---|
729 | # ---------------------------------------------------------------------- |
---|
730 | # USAGE: request_REGISTER <clientId> <user> <address> <cookie> <protocol> |
---|
731 | # |
---|
732 | # Used internally to handle REGISTER requests on this server. A client |
---|
733 | # sends REGISTER requests when it wants to be notified of file transfer |
---|
734 | # operations. The <cookie> must match the one for this server, so |
---|
735 | # we know we can trust the client. The <protocol> tells us what version |
---|
736 | # of filexfer client we're talking to. If the protocol doesn't match |
---|
737 | # the current version, we warn the user to restart his browser. |
---|
738 | # ---------------------------------------------------------------------- |
---|
739 | proc Rappture::filexfer::request_REGISTER {cid user addr clientCookie proto} { |
---|
740 | variable clients |
---|
741 | variable cookie |
---|
742 | variable protocol |
---|
743 | |
---|
744 | if {![string equal $cookie $clientCookie]} { |
---|
745 | response $cid header -status "401 Unauthorized" |
---|
746 | response $cid error -status "401 Unauthorized" -message "Credentials are not recognized." |
---|
747 | } else { |
---|
748 | # add this client to the known listeners |
---|
749 | set clients($cid) 0 |
---|
750 | set protocol($cid) $proto |
---|
751 | } |
---|
752 | } |
---|
753 | |
---|
754 | # ---------------------------------------------------------------------- |
---|
755 | # USAGE: request_UNREGISTER <clientId> |
---|
756 | # |
---|
757 | # Used internally to handle UNREGISTER requests on this server. |
---|
758 | # A client sends this request when it is being destroyed, to let |
---|
759 | # the server know that it no longer needs to handle this client. |
---|
760 | # ---------------------------------------------------------------------- |
---|
761 | proc Rappture::filexfer::request_UNREGISTER {cid} { |
---|
762 | variable clients |
---|
763 | |
---|
764 | set i [lsearch -exact $cid $clients(order)] |
---|
765 | if {$i >= 0} { |
---|
766 | set clients(order) [lreplace $clients(order) $i $i] |
---|
767 | } |
---|
768 | catch {unset clients($cid)} |
---|
769 | } |
---|
770 | |
---|
771 | # ---------------------------------------------------------------------- |
---|
772 | # USAGE: request_ACTIVATE <clientId> |
---|
773 | # |
---|
774 | # Used internally to handle ACTIVATE requests on this server. A client |
---|
775 | # must first REGISTER with its cookie for authorization. Then, as |
---|
776 | # its thread starts, it sends an ACTIVATE request, letting us know |
---|
777 | # that the client is ready to receive notifications. |
---|
778 | # ---------------------------------------------------------------------- |
---|
779 | proc Rappture::filexfer::request_ACTIVATE {cid} { |
---|
780 | variable clients |
---|
781 | |
---|
782 | # |
---|
783 | # Activate only if the client has already registered |
---|
784 | # properly and is on our known list. |
---|
785 | # |
---|
786 | if {[info exists clients($cid)]} { |
---|
787 | set clients($cid) 1 |
---|
788 | |
---|
789 | # move the most recently activated connection to the front |
---|
790 | set i [lsearch -exact $cid $clients(order)] |
---|
791 | if {$i >= 0} { |
---|
792 | set clients(order) [lreplace $clients(order) $i $i] |
---|
793 | } |
---|
794 | set clients(order) [linsert $clients(order) 0 $cid] |
---|
795 | } |
---|
796 | } |
---|
797 | |
---|
798 | # ---------------------------------------------------------------------- |
---|
799 | # USAGE: request_DEACTIVATE <clientId> |
---|
800 | # |
---|
801 | # Used internally to handle DEACTIVATE requests on this server. A client |
---|
802 | # must first REGISTER with its cookie for authorization. Then, as |
---|
803 | # its thread starts, it sends an ACTIVATE request. When its thread |
---|
804 | # stops (because the applet is swapped out of the web page), the |
---|
805 | # client sends a DEACTIVATE request, and we stop sending messages to |
---|
806 | # that client. |
---|
807 | # ---------------------------------------------------------------------- |
---|
808 | proc Rappture::filexfer::request_DEACTIVATE {cid} { |
---|
809 | variable clients |
---|
810 | |
---|
811 | # |
---|
812 | # Deactivate only if the client has already registered |
---|
813 | # properly and is on our known list. |
---|
814 | # |
---|
815 | if {[info exists clients($cid)]} { |
---|
816 | set clients($cid) 0 |
---|
817 | |
---|
818 | # remove this from the list of activated connections |
---|
819 | set i [lsearch -exact $cid $clients(order)] |
---|
820 | if {$i >= 0} { |
---|
821 | set clients(order) [lreplace $clients(order) $i $i] |
---|
822 | } |
---|
823 | } |
---|
824 | } |
---|
825 | |
---|
826 | # ---------------------------------------------------------------------- |
---|
827 | # USAGE: Rappture::filexfer::shutdown <clientId> |
---|
828 | # |
---|
829 | # Used internally to close and clean up a client connection. |
---|
830 | # Clears any data associated with the client. |
---|
831 | # ---------------------------------------------------------------------- |
---|
832 | proc Rappture::filexfer::shutdown {cid} { |
---|
833 | variable clients |
---|
834 | variable buffer |
---|
835 | |
---|
836 | catch {close $cid} |
---|
837 | |
---|
838 | if {[info exists clients($cid)]} { |
---|
839 | unset clients($cid) |
---|
840 | } |
---|
841 | set i [lsearch -exact $clients(order) $cid] |
---|
842 | if {$i >= 0} { |
---|
843 | set clients(order) [lreplace $clients(order) $i $i] |
---|
844 | } |
---|
845 | |
---|
846 | if {[info exists buffer($cid)] && "" != $buffer($cid)} { |
---|
847 | unset buffer($cid) |
---|
848 | } |
---|
849 | } |
---|
850 | |
---|
851 | # ---------------------------------------------------------------------- |
---|
852 | # USAGE: response <channel> header -status <s> -connection <c> |
---|
853 | # USAGE: response <channel> body -string <s> -type <t> |
---|
854 | # USAGE: response <channel> error -message <m> |
---|
855 | # USAGE: response <channel> file -path <f> |
---|
856 | # |
---|
857 | # Used internally to generate responses to the client. Returns a |
---|
858 | # string representing the requested response. |
---|
859 | # ---------------------------------------------------------------------- |
---|
860 | proc Rappture::filexfer::response {cid what args} { |
---|
861 | variable mime2ext |
---|
862 | variable ext2mime |
---|
863 | variable mime2type |
---|
864 | |
---|
865 | switch -- $what { |
---|
866 | header { |
---|
867 | Rappture::getopts args params { |
---|
868 | value -status "" |
---|
869 | value -connection close |
---|
870 | } |
---|
871 | set s [clock seconds] |
---|
872 | set date [clock format $s -format {%a, %d %b %Y %H:%M:%S %Z}] |
---|
873 | puts $cid [format "HTTP/1.1 %s |
---|
874 | Date: %s |
---|
875 | Server: Rappture |
---|
876 | Connection: %s" $params(-status) $date $params(-connection)] |
---|
877 | } |
---|
878 | |
---|
879 | body { |
---|
880 | Rappture::getopts args params { |
---|
881 | value -string "" |
---|
882 | value -type "auto" |
---|
883 | } |
---|
884 | if {$params(-type) == "auto"} { |
---|
885 | if {[isbinary $params(-string)]} { |
---|
886 | set params(-type) "application/octet-stream" |
---|
887 | } else { |
---|
888 | set params(-type) "text/plain" |
---|
889 | } |
---|
890 | } |
---|
891 | puts $cid [format "Content-type: %s\nContent-length: %d\n" \ |
---|
892 | $params(-type) [string length $params(-string)]] |
---|
893 | |
---|
894 | if {$mime2type($params(-type)) == "binary"} { |
---|
895 | # binary data -- send data as raw bytes |
---|
896 | set olde [fconfigure $cid -encoding] |
---|
897 | fconfigure $cid -buffering none -encoding binary |
---|
898 | puts -nonewline $cid $params(-string) |
---|
899 | flush $cid |
---|
900 | fconfigure $cid -buffering line -encoding $olde |
---|
901 | } else { |
---|
902 | # ascii data -- send normally |
---|
903 | puts $cid $params(-string) |
---|
904 | } |
---|
905 | } |
---|
906 | |
---|
907 | error { |
---|
908 | Rappture::getopts args params { |
---|
909 | value -status "400 Bad Request" |
---|
910 | value -message "" |
---|
911 | } |
---|
912 | set heading [lrange $params(-status) 1 end] |
---|
913 | set html [format "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"> |
---|
914 | <HTML><HEAD> |
---|
915 | <TITLE>%s</TITLE> |
---|
916 | </HEAD><BODY> |
---|
917 | <H1>%s</H1> |
---|
918 | %s |
---|
919 | </BODY></HTML>" $params(-status) $heading $params(-message)] |
---|
920 | response $cid body -type text/html -string $html |
---|
921 | } |
---|
922 | |
---|
923 | file { |
---|
924 | Rappture::getopts args params { |
---|
925 | value -path "" |
---|
926 | value -connection close |
---|
927 | } |
---|
928 | if {![file exists $params(-path)]} { |
---|
929 | # |
---|
930 | # FILE NOT FOUND: |
---|
931 | # The user is requesting some file that is not part of |
---|
932 | # the standard filexfer installation. |
---|
933 | # |
---|
934 | response $cid header \ |
---|
935 | -status "404 Not Found" \ |
---|
936 | -connection $params(-connection) |
---|
937 | |
---|
938 | response $cid error -status "404 Not Found" -message "The requested file $params(-path) was not found on this server." |
---|
939 | } elseif {[catch { |
---|
940 | set fid [open $params(-path) r] |
---|
941 | set data [read $fid] |
---|
942 | close $fid |
---|
943 | } result]} { |
---|
944 | |
---|
945 | response $cid error -status "500 Internal Server Error" -message "The requested file $params(-path) is not installed properly on this server." |
---|
946 | response $cid header \ |
---|
947 | -status "500 Internal Server Error" \ |
---|
948 | -connection $params(-connection) |
---|
949 | } else { |
---|
950 | # |
---|
951 | # READ AND RETURN THE FILE |
---|
952 | # |
---|
953 | set ext [file extension $params(-path)] |
---|
954 | if {[info exists ext2mime($ext)]} { |
---|
955 | set mtype $ext2mime($ext) |
---|
956 | } else { |
---|
957 | if {[isbinary $data]} { |
---|
958 | set mtype application/octet-stream |
---|
959 | } else { |
---|
960 | set mtype text/plain |
---|
961 | } |
---|
962 | } |
---|
963 | |
---|
964 | if {$mime2type($mtype) == "binary"} { |
---|
965 | # if this is binary data, read it again and get pure bytes |
---|
966 | catch { |
---|
967 | set fid [open $params(-path) r] |
---|
968 | fconfigure $fid -translation binary -encoding binary |
---|
969 | set data [read $fid] |
---|
970 | close $fid |
---|
971 | } result |
---|
972 | } |
---|
973 | response $cid header \ |
---|
974 | -status "200 OK" \ |
---|
975 | -connection $params(-connection) |
---|
976 | set s [file mtime $params(-path)] |
---|
977 | set date [clock format $s -format {%a, %d %b %Y %H:%M:%S %Z}] |
---|
978 | puts $cid "Last-Modified: $date" |
---|
979 | |
---|
980 | response $cid body -type $mtype -string $data |
---|
981 | } |
---|
982 | } |
---|
983 | } |
---|
984 | } |
---|
985 | |
---|
986 | # ---------------------------------------------------------------------- |
---|
987 | # USAGE: Rappture::filexfer::urlDecode <string> |
---|
988 | # |
---|
989 | # Used internally to decode a string in URL-encoded form back to |
---|
990 | # its normal ASCII equivalent. Returns the input string, but with |
---|
991 | # any %XX characters translated back to their ASCII equivalents. |
---|
992 | # ---------------------------------------------------------------------- |
---|
993 | proc Rappture::filexfer::urlDecode {string} { |
---|
994 | while {[regexp -indices {%[0-9A-Fa-f][0-9A-Fa-f]} $string match]} { |
---|
995 | foreach {p0 p1} $match break |
---|
996 | set hex [string range $string [expr {$p0+1}] $p1] |
---|
997 | set char [binary format c [scan $hex "%x"]] |
---|
998 | set string [string replace $string $p0 $p1 $char] |
---|
999 | } |
---|
1000 | return $string |
---|
1001 | } |
---|
1002 | |
---|
1003 | # ---------------------------------------------------------------------- |
---|
1004 | # USAGE: isbinary <string> |
---|
1005 | # |
---|
1006 | # Used internally to see if the given <string> has binary data. |
---|
1007 | # If so, then it must be treated differently. Normal translation |
---|
1008 | # of carriage returns and line feeds must be suppressed. |
---|
1009 | # ---------------------------------------------------------------------- |
---|
1010 | proc Rappture::filexfer::isbinary {string} { |
---|
1011 | # look for binary characters, but avoid things like \t \n etc. |
---|
1012 | return [regexp {[\000-\006\016-\037\177-\400]} $string] |
---|
1013 | } |
---|
1014 | |
---|
1015 | # ---------------------------------------------------------------------- |
---|
1016 | # USAGE: bakeCookie |
---|
1017 | # |
---|
1018 | # Used internally to create a one-time use cookie, passed to clients |
---|
1019 | # to secure file transfer. Only clients should know the cookie, so |
---|
1020 | # only clients will have access to files. |
---|
1021 | # ---------------------------------------------------------------------- |
---|
1022 | proc Rappture::filexfer::bakeCookie {} { |
---|
1023 | variable cookieChars |
---|
1024 | |
---|
1025 | set cmax [expr {[llength $cookieChars]-1}] |
---|
1026 | set cookie "" |
---|
1027 | while {[string length $cookie] < 40} { |
---|
1028 | set rindex [expr {round(rand()*$cmax)}] |
---|
1029 | append cookie [lindex $cookieChars $rindex] |
---|
1030 | } |
---|
1031 | return $cookie |
---|
1032 | } |
---|
1033 | |
---|
1034 | # ---------------------------------------------------------------------- |
---|
1035 | # USAGE: Rappture::filexfer::option_port <port> |
---|
1036 | # |
---|
1037 | # Called when the "filexfer_port" directive is encountered while |
---|
1038 | # parsing the "resources" file. Assigns the port that the filexfer |
---|
1039 | # server should be listening to. |
---|
1040 | # ---------------------------------------------------------------------- |
---|
1041 | proc Rappture::filexfer::option_port {newport} { |
---|
1042 | variable port |
---|
1043 | set port $newport |
---|
1044 | } |
---|
1045 | |
---|
1046 | # ---------------------------------------------------------------------- |
---|
1047 | # USAGE: Rappture::filexfer::option_cookie <cookie> |
---|
1048 | # |
---|
1049 | # Called when the "filexfer_cookie" directive is encountered while |
---|
1050 | # parsing the "resources" file. Assigns the port that the filexfer |
---|
1051 | # server should be listening to. |
---|
1052 | # ---------------------------------------------------------------------- |
---|
1053 | proc Rappture::filexfer::option_cookie {newcookie} { |
---|
1054 | variable cookie |
---|
1055 | set cookie $newcookie |
---|
1056 | } |
---|
1057 | |
---|
1058 | # ---------------------------------------------------------------------- |
---|
1059 | # USAGE: Rappture::filexfer::option_sitelogo <html> |
---|
1060 | # |
---|
1061 | # Called when the "filexfer_sitelogo" directive is encountered while |
---|
1062 | # parsing the "resources" file. Stores the html text for later use |
---|
1063 | # in the filexfer upload form. The site logo appears at the top of |
---|
1064 | # the form to identify the hub site that issued the form. |
---|
1065 | # ---------------------------------------------------------------------- |
---|
1066 | proc Rappture::filexfer::option_sitelogo {html} { |
---|
1067 | variable sitelogo |
---|
1068 | set sitelogo $html |
---|
1069 | } |
---|
1070 | |
---|
1071 | # ---------------------------------------------------------------------- |
---|
1072 | # USAGE: Rappture::filexfer::option_stylesheet <url> |
---|
1073 | # |
---|
1074 | # Called when the "filexfer_stylesheet" directive is encountered while |
---|
1075 | # parsing the "resources" file. Stores the url for later use in the |
---|
1076 | # filexfer upload form. The style sheet customizes the form to have |
---|
1077 | # a particular look for the hub site that issued the form. |
---|
1078 | # ---------------------------------------------------------------------- |
---|
1079 | proc Rappture::filexfer::option_stylesheet {url} { |
---|
1080 | variable stylesheet |
---|
1081 | set stylesheet $url |
---|
1082 | } |
---|