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Original Path: trunk/webwork-modperl/lib/WeBWorK.pm
| 1 : | sh002i | 986 | ################################################################################ |
| 2 : | sh002i | 1663 | # WeBWorK Online Homework Delivery System |
| 3 : | sh002i | 3973 | # Copyright © 2000-2006 The WeBWorK Project, http://openwebwork.sf.net/ |
| 4 : | sh002i | 4491 | # $CVSHeader: webwork2/lib/WeBWorK.pm,v 1.92 2006/08/14 18:14:22 sh002i Exp $ |
| 5 : | sh002i | 1663 | # |
| 6 : | # This program is free software; you can redistribute it and/or modify it under | ||
| 7 : | # the terms of either: (a) the GNU General Public License as published by the | ||
| 8 : | # Free Software Foundation; either version 2, or (at your option) any later | ||
| 9 : | # version, or (b) the "Artistic License" which comes with this package. | ||
| 10 : | # | ||
| 11 : | # This program is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 : | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
| 13 : | # FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the | ||
| 14 : | # Artistic License for more details. | ||
| 15 : | sh002i | 986 | ################################################################################ |
| 16 : | |||
| 17 : | package WeBWorK; | ||
| 18 : | |||
| 19 : | =head1 NAME | ||
| 20 : | |||
| 21 : | sh002i | 1565 | WeBWorK - Dispatch requests to the appropriate content generator. |
| 22 : | sh002i | 986 | |
| 23 : | sh002i | 1565 | =head1 SYNOPSIS |
| 24 : | |||
| 25 : | my $r = Apache->request; | ||
| 26 : | my $result = eval { WeBWorK::dispatch($r) }; | ||
| 27 : | die "something bad happened: $@" if $@; | ||
| 28 : | |||
| 29 : | =head1 DESCRIPTION | ||
| 30 : | |||
| 31 : | C<WeBWorK> is the dispatcher for the WeBWorK system. Given an Apache request | ||
| 32 : | object, it performs authentication and determines which subclass of | ||
| 33 : | C<WeBWorK::ContentGenerator> to call. | ||
| 34 : | |||
| 35 : | sh002i | 986 | =cut |
| 36 : | |||
| 37 : | sh002i | 4010 | BEGIN { $main::VERSION = "2.x"; } |
| 38 : | sh002i | 1548 | |
| 39 : | sh002i | 986 | use strict; |
| 40 : | use warnings; | ||
| 41 : | sh002i | 3535 | use Time::HiRes qw/time/; |
| 42 : | sh002i | 2368 | |
| 43 : | # load WeBWorK::Constants before anything else | ||
| 44 : | # this sets package variables in several packages | ||
| 45 : | use WeBWorK::Constants; | ||
| 46 : | |||
| 47 : | sh002i | 4304 | use WeBWorK::Authen; |
| 48 : | sh002i | 986 | use WeBWorK::Authz; |
| 49 : | use WeBWorK::CourseEnvironment; | ||
| 50 : | use WeBWorK::DB; | ||
| 51 : | sh002i | 2368 | use WeBWorK::Debug; |
| 52 : | use WeBWorK::Request; | ||
| 53 : | sh002i | 1616 | use WeBWorK::Upload; |
| 54 : | sh002i | 1836 | use WeBWorK::URLPath; |
| 55 : | sh002i | 3535 | use WeBWorK::Utils qw(runtime_use writeTimingLogEntry); |
| 56 : | sh002i | 1836 | |
| 57 : | sh002i | 4243 | use mod_perl; |
| 58 : | use constant MP2 => ( exists $ENV{MOD_PERL_API_VERSION} and $ENV{MOD_PERL_API_VERSION} >= 2 ); | ||
| 59 : | |||
| 60 : | # Apache2 needs upload class | ||
| 61 : | BEGIN { | ||
| 62 : | if (MP2) { | ||
| 63 : | require Apache2::Upload; | ||
| 64 : | Apache2::Upload->import(); | ||
| 65 : | sh002i | 4262 | require Apache2::RequestUtil; |
| 66 : | Apache2::RequestUtil->import(); | ||
| 67 : | sh002i | 4243 | } |
| 68 : | } | ||
| 69 : | |||
| 70 : | sh002i | 4046 | use constant LOGIN_MODULE => "WeBWorK::ContentGenerator::Login"; |
| 71 : | use constant PROCTOR_LOGIN_MODULE => "WeBWorK::ContentGenerator::LoginProctor"; | ||
| 72 : | sh002i | 1836 | |
| 73 : | sh002i | 4491 | BEGIN { |
| 74 : | # pre-compile all content generators | ||
| 75 : | # Login and LoginProctor need to be handled separately, since they don't have paths | ||
| 76 : | map { eval "require $_" } | ||
| 77 : | WeBWorK::URLPath->all_modules, | ||
| 78 : | LOGIN_MODULE, | ||
| 79 : | PROCTOR_LOGIN_MODULE; | ||
| 80 : | # other candidates for preloading: | ||
| 81 : | # - DB Record, Schema, and Driver classes (esp. Driver::SQL as it loads DBI) | ||
| 82 : | # - CourseManagement subclasses (ditto. sql_single.pm) | ||
| 83 : | # - WeBWorK::PG::Local, which loads WeBWorK::PG::Translator | ||
| 84 : | # - Authen subclasses | ||
| 85 : | } | ||
| 86 : | |||
| 87 : | sh002i | 2491 | our %SeedCE; |
| 88 : | |||
| 89 : | sh002i | 1879 | sub dispatch($) { |
| 90 : | sh002i | 1836 | my ($apache) = @_; |
| 91 : | sh002i | 4262 | my $r = new WeBWorK::Request($apache); |
| 92 : | sh002i | 1836 | |
| 93 : | my $method = $r->method; | ||
| 94 : | my $location = $r->location; | ||
| 95 : | my $uri = $r->uri; | ||
| 96 : | my $path_info = $r->path_info | ""; | ||
| 97 : | my $args = $r->args || ""; | ||
| 98 : | sh002i | 2491 | #my $webwork_root = $r->dir_config("webwork_root"); |
| 99 : | #my $pg_root = $r->dir_config("pg_root"); | ||
| 100 : | sh002i | 1836 | |
| 101 : | sh002i | 2638 | debug("\n\n===> Begin " . __PACKAGE__ . "::dispatch() <===\n\n"); |
| 102 : | sh002i | 1836 | debug("Hi, I'm the new dispatcher!\n"); |
| 103 : | debug(("-" x 80) . "\n"); | ||
| 104 : | |||
| 105 : | debug("Okay, I got some basic information:\n"); | ||
| 106 : | debug("The apache location is $location\n"); | ||
| 107 : | debug("The request method is $method\n"); | ||
| 108 : | debug("The URI is $uri\n"); | ||
| 109 : | debug("The path-info is $path_info\n"); | ||
| 110 : | debug("The argument string is $args\n"); | ||
| 111 : | sh002i | 2491 | #debug("The WeBWorK root directory is $webwork_root\n"); |
| 112 : | #debug("The PG root directory is $pg_root\n"); | ||
| 113 : | sh002i | 1836 | debug(("-" x 80) . "\n"); |
| 114 : | |||
| 115 : | debug("The first thing we need to do is munge the path a little:\n"); | ||
| 116 : | |||
| 117 : | my ($path) = $uri =~ m/$location(.*)/; | ||
| 118 : | $path = "/" if $path eq ""; # no path at all | ||
| 119 : | |||
| 120 : | debug("We can't trust the path-info, so we make our own path.\n"); | ||
| 121 : | debug("path-info claims: $path_info\n"); | ||
| 122 : | debug("but it's really: $path\n"); | ||
| 123 : | debug("(if it's empty, we set it to \"/\".)\n"); | ||
| 124 : | |||
| 125 : | $path =~ s|/+|/|g; | ||
| 126 : | debug("...and here it is without repeated slashes: $path\n"); | ||
| 127 : | |||
| 128 : | # lookbehind assertion for "not a slash" | ||
| 129 : | # matches the boundary after the last char | ||
| 130 : | $path =~ s|(?<=[^/])$|/|; | ||
| 131 : | debug("...and here it is with a trailing slash: $path\n"); | ||
| 132 : | |||
| 133 : | debug(("-" x 80) . "\n"); | ||
| 134 : | |||
| 135 : | debug("Now we need to look at the path a little to figure out where we are\n"); | ||
| 136 : | |||
| 137 : | debug("-------------------- call to WeBWorK::URLPath::newFromPath\n"); | ||
| 138 : | sh002i | 1885 | my $urlPath = WeBWorK::URLPath->newFromPath($path); |
| 139 : | sh002i | 1836 | debug("-------------------- call to WeBWorK::URLPath::newFromPath\n"); |
| 140 : | |||
| 141 : | unless ($urlPath) { | ||
| 142 : | debug("This path is invalid... see you later!\n"); | ||
| 143 : | sh002i | 2434 | die "The path '$path' is not valid.\n"; |
| 144 : | sh002i | 1836 | } |
| 145 : | |||
| 146 : | my $displayModule = $urlPath->module; | ||
| 147 : | my %displayArgs = $urlPath->args; | ||
| 148 : | sh002i | 2434 | |
| 149 : | sh002i | 2970 | unless ($displayModule) { |
| 150 : | debug("The display module is empty, so we can DECLINE here.\n"); | ||
| 151 : | die "No display module found for path '$path'."; | ||
| 152 : | } | ||
| 153 : | |||
| 154 : | sh002i | 1836 | debug("The display module for this path is: $displayModule\n"); |
| 155 : | debug("...and here are the arguments we'll pass to it:\n"); | ||
| 156 : | foreach my $key (keys %displayArgs) { | ||
| 157 : | debug("\t$key => $displayArgs{$key}\n"); | ||
| 158 : | } | ||
| 159 : | |||
| 160 : | my $selfPath = $urlPath->path; | ||
| 161 : | my $parent = $urlPath->parent; | ||
| 162 : | my $parentPath = $parent ? $parent->path : "<no parent>"; | ||
| 163 : | |||
| 164 : | debug("Reconstructing the original path gets us: $selfPath\n"); | ||
| 165 : | debug("And we can generate the path to our parent, too: $parentPath\n"); | ||
| 166 : | debug("(We could also figure out who our children are, but we'd need to supply additional arguments.)\n"); | ||
| 167 : | debug(("-" x 80) . "\n"); | ||
| 168 : | |||
| 169 : | sh002i | 1885 | debug("The URLPath looks good, we'll add it to the request.\n"); |
| 170 : | $r->urlpath($urlPath); | ||
| 171 : | |||
| 172 : | sh002i | 1836 | debug("Now we want to look at the parameters we got.\n"); |
| 173 : | |||
| 174 : | debug("The raw params:\n"); | ||
| 175 : | foreach my $key ($r->param) { | ||
| 176 : | sh002i | 4211 | my @vals = $r->param($key); |
| 177 : | my $vals = join(", ", map { "'$_'" } @vals); | ||
| 178 : | debug("\t$key => $vals\n"); | ||
| 179 : | sh002i | 1836 | } |
| 180 : | |||
| 181 : | sh002i | 1895 | #mungeParams($r); |
| 182 : | sh002i | 4211 | # |
| 183 : | #debug("The munged params:\n"); | ||
| 184 : | #foreach my $key ($r->param) { | ||
| 185 : | # debug("\t$key\n"); | ||
| 186 : | # debug("\t\t$_\n") foreach $r->param($key); | ||
| 187 : | #} | ||
| 188 : | sh002i | 1836 | |
| 189 : | debug(("-" x 80) . "\n"); | ||
| 190 : | |||
| 191 : | sh002i | 4374 | my $apache_hostname = $r->hostname; |
| 192 : | my $apache_port = $r->get_server_port; | ||
| 193 : | my $apache_is_ssl = ($r->subprocess_env('https') ? 1 : ""); | ||
| 194 : | my $apache_root_url; | ||
| 195 : | if ($r->subprocess_env('https')) { | ||
| 196 : | $apache_root_url = "https://$apache_hostname"; | ||
| 197 : | $apache_root_url .= ":$apache_port" if $apache_port != 443; | ||
| 198 : | } else { | ||
| 199 : | $apache_root_url = "http://$apache_hostname"; | ||
| 200 : | $apache_root_url .= ":$apache_port" if $apache_port != 80; | ||
| 201 : | } | ||
| 202 : | |||
| 203 : | sh002i | 1836 | debug("We need to get a course environment (with or without a courseID!)\n"); |
| 204 : | sh002i | 2491 | my $ce = eval { new WeBWorK::CourseEnvironment({ |
| 205 : | %SeedCE, | ||
| 206 : | courseName => $displayArgs{courseID}, | ||
| 207 : | sh002i | 4374 | # this is kind of a hack, but it's really the only sane way to get this |
| 208 : | # server information into the PG box | ||
| 209 : | apache_hostname => $apache_hostname, | ||
| 210 : | apache_port => $apache_port, | ||
| 211 : | apache_is_ssl => $apache_is_ssl, | ||
| 212 : | apache_root_url => $apache_root_url, | ||
| 213 : | sh002i | 2491 | }) }; |
| 214 : | sh002i | 2437 | $@ and die "Failed to initialize course environment: $@\n"; |
| 215 : | sh002i | 1836 | debug("Here's the course environment: $ce\n"); |
| 216 : | sh002i | 1885 | $r->ce($ce); |
| 217 : | sh002i | 1836 | |
| 218 : | sh002i | 4243 | my @uploads; |
| 219 : | if (MP2) { | ||
| 220 : | my $upload_table = $r->upload; | ||
| 221 : | @uploads = values %$upload_table if defined $upload_table; | ||
| 222 : | } else { | ||
| 223 : | @uploads = $r->upload; | ||
| 224 : | } | ||
| 225 : | sh002i | 1879 | foreach my $u (@uploads) { |
| 226 : | # make sure it's a "real" upload | ||
| 227 : | next unless $u->filename; | ||
| 228 : | |||
| 229 : | # store the upload | ||
| 230 : | my $upload = WeBWorK::Upload->store($u, | ||
| 231 : | dir => $ce->{webworkDirs}->{uploadCache} | ||
| 232 : | ); | ||
| 233 : | |||
| 234 : | # store the upload ID and hash in the file upload field | ||
| 235 : | my $id = $upload->id; | ||
| 236 : | my $hash = $upload->hash; | ||
| 237 : | $r->param($u->name => "$id $hash"); | ||
| 238 : | } | ||
| 239 : | sh002i | 1836 | |
| 240 : | sh002i | 3833 | # create these out here. they should fail if they don't have the right information |
| 241 : | # this lets us not be so careful about whether these objects are defined when we use them. | ||
| 242 : | # instead, we just create the behavior that if they don't have a valid $db they fail. | ||
| 243 : | my $authz = new WeBWorK::Authz($r); | ||
| 244 : | $r->authz($authz); | ||
| 245 : | sh002i | 4080 | |
| 246 : | # figure out which authentication modules to use | ||
| 247 : | sh002i | 4304 | #my $user_authen_module; |
| 248 : | #my $proctor_authen_module; | ||
| 249 : | #if (ref $ce->{authen}{user_module} eq "HASH") { | ||
| 250 : | # if (exists $ce->{authen}{user_module}{$ce->{dbLayoutName}}) { | ||
| 251 : | # $user_authen_module = $ce->{authen}{user_module}{$ce->{dbLayoutName}}; | ||
| 252 : | # } else { | ||
| 253 : | # $user_authen_module = $ce->{authen}{user_module}{"*"}; | ||
| 254 : | # } | ||
| 255 : | #} else { | ||
| 256 : | # $user_authen_module = $ce->{authen}{user_module}; | ||
| 257 : | #} | ||
| 258 : | #if (ref $ce->{authen}{proctor_module} eq "HASH") { | ||
| 259 : | # if (exists $ce->{authen}{proctor_module}{$ce->{dbLayoutName}}) { | ||
| 260 : | # $proctor_authen_module = $ce->{authen}{proctor_module}{$ce->{dbLayoutName}}; | ||
| 261 : | # } else { | ||
| 262 : | # $proctor_authen_module = $ce->{authen}{proctor_module}{"*"}; | ||
| 263 : | # } | ||
| 264 : | #} else { | ||
| 265 : | # $proctor_authen_module = $ce->{authen}{proctor_module}; | ||
| 266 : | #} | ||
| 267 : | sh002i | 4080 | |
| 268 : | sh002i | 4304 | my $user_authen_module = WeBWorK::Authen::class($ce, "user_module"); |
| 269 : | |||
| 270 : | sh002i | 4080 | runtime_use $user_authen_module; |
| 271 : | my $authen = $user_authen_module->new($r); | ||
| 272 : | debug("Using user_authen_module $user_authen_module: $authen\n"); | ||
| 273 : | sh002i | 3833 | $r->authen($authen); |
| 274 : | sh002i | 2434 | |
| 275 : | sh002i | 3833 | my $db; |
| 276 : | |||
| 277 : | sh002i | 2437 | if ($displayArgs{courseID}) { |
| 278 : | sh002i | 1836 | debug("We got a courseID from the URLPath, now we can do some stuff:\n"); |
| 279 : | sh002i | 2437 | |
| 280 : | unless (-e $ce->{courseDirs}->{root}) { | ||
| 281 : | die "Course '$displayArgs{courseID}' not found: $!"; | ||
| 282 : | } | ||
| 283 : | |||
| 284 : | sh002i | 1836 | debug("...we can create a database object...\n"); |
| 285 : | $db = new WeBWorK::DB($ce->{dbLayout}); | ||
| 286 : | debug("(here's the DB handle: $db)\n"); | ||
| 287 : | sh002i | 1885 | $r->db($db); |
| 288 : | sh002i | 1836 | |
| 289 : | my $authenOK = $authen->verify; | ||
| 290 : | if ($authenOK) { | ||
| 291 : | sh002i | 3003 | my $userID = $r->param("user"); |
| 292 : | debug("Hi, $userID, glad you made it.\n"); | ||
| 293 : | sh002i | 1836 | |
| 294 : | sh002i | 3058 | # tell authorizer to cache this user's permission level |
| 295 : | $authz->setCachedUser($userID); | ||
| 296 : | |||
| 297 : | sh002i | 1836 | debug("Now we deal with the effective user:\n"); |
| 298 : | my $eUserID = $r->param("effectiveUser") || $userID; | ||
| 299 : | debug("userID=$userID eUserID=$eUserID\n"); | ||
| 300 : | sh002i | 3673 | if ($userID ne $eUserID) { |
| 301 : | debug("userID and eUserID differ... seeing if userID has 'become_student' permission.\n"); | ||
| 302 : | my $su_authorized = $authz->hasPermissions($userID, "become_student"); | ||
| 303 : | if ($su_authorized) { | ||
| 304 : | debug("Ok, looks like you're allowed to become $eUserID. Whoopie!\n"); | ||
| 305 : | } else { | ||
| 306 : | debug("Uh oh, you're not allowed to become $eUserID. Nice try!\n"); | ||
| 307 : | sh002i | 3705 | die "You are not allowed to act as another user.\n"; |
| 308 : | sh002i | 3673 | } |
| 309 : | sh002i | 1836 | } |
| 310 : | sh002i | 3673 | |
| 311 : | # set effectiveUser in case it was changed or not set to begin with | ||
| 312 : | sh002i | 1836 | $r->param("effectiveUser" => $eUserID); |
| 313 : | sh002i | 3673 | |
| 314 : | # if we're doing a proctored test, after the user has been authenticated | ||
| 315 : | # we need to also check on the proctor. note that in the gateway quiz | ||
| 316 : | # module we double check this, to be sure that someone isn't taking a | ||
| 317 : | # proctored quiz but calling the unproctored ContentGenerator | ||
| 318 : | glarose | 3377 | my $urlProducedPath = $urlPath->path(); |
| 319 : | if ( $urlProducedPath =~ /proctored_quiz_mode/i ) { | ||
| 320 : | sh002i | 4304 | my $proctor_authen_module = WeBWorK::Authen::class($ce, "proctor_module"); |
| 321 : | sh002i | 4080 | runtime_use $proctor_authen_module; |
| 322 : | my $authenProctor = $proctor_authen_module->new($r); | ||
| 323 : | sh002i | 4304 | debug("Using proctor_authen_module $proctor_authen_module: $authenProctor\n"); |
| 324 : | sh002i | 4046 | my $procAuthOK = $authenProctor->verify(); |
| 325 : | |||
| 326 : | if (not $procAuthOK) { | ||
| 327 : | $displayModule = PROCTOR_LOGIN_MODULE; | ||
| 328 : | glarose | 3377 | } |
| 329 : | } | ||
| 330 : | sh002i | 1836 | } else { |
| 331 : | debug("Bad news: authentication failed!\n"); | ||
| 332 : | sh002i | 4046 | $displayModule = LOGIN_MODULE; |
| 333 : | sh002i | 1836 | debug("set displayModule to $displayModule\n"); |
| 334 : | } | ||
| 335 : | } | ||
| 336 : | |||
| 337 : | sh002i | 3535 | # store the time before we invoke the content generator |
| 338 : | my $cg_start = time; # this is Time::HiRes's time, which gives floating point values | ||
| 339 : | |||
| 340 : | sh002i | 1836 | debug(("-" x 80) . "\n"); |
| 341 : | debug("Finally, we'll load the display module...\n"); | ||
| 342 : | |||
| 343 : | runtime_use($displayModule); | ||
| 344 : | |||
| 345 : | debug("...instantiate it...\n"); | ||
| 346 : | |||
| 347 : | my $instance = $displayModule->new($r); | ||
| 348 : | |||
| 349 : | debug("...and call it:\n"); | ||
| 350 : | debug("-------------------- call to ${displayModule}::go\n"); | ||
| 351 : | |||
| 352 : | my $result = $instance->go(); | ||
| 353 : | |||
| 354 : | debug("-------------------- call to ${displayModule}::go\n"); | ||
| 355 : | |||
| 356 : | sh002i | 3535 | my $cg_end = time; |
| 357 : | my $cg_duration = $cg_end - $cg_start; | ||
| 358 : | writeTimingLogEntry($ce, "[".$r->uri."]", sprintf("runTime = %.3f sec", $cg_duration)." ".$ce->{dbLayoutName}, ""); | ||
| 359 : | |||
| 360 : | sh002i | 1910 | debug("returning result: " . (defined $result ? $result : "UNDEF") . "\n"); |
| 361 : | sh002i | 2346 | |
| 362 : | gage | 2098 | return $result; |
| 363 : | sh002i | 1836 | } |
| 364 : | |||
| 365 : | sub mungeParams { | ||
| 366 : | my ($r) = @_; | ||
| 367 : | |||
| 368 : | my @paramQueue; | ||
| 369 : | |||
| 370 : | # remove all the params from the request, and store them in the param queue | ||
| 371 : | foreach my $key ($r->param) { | ||
| 372 : | push @paramQueue, [ $key => [ $r->param($key) ] ]; | ||
| 373 : | $r->parms->unset($key) | ||
| 374 : | } | ||
| 375 : | |||
| 376 : | # exhaust the param queue, decoding encoded params | ||
| 377 : | while (@paramQueue) { | ||
| 378 : | my ($key, $values) = @{ shift @paramQueue }; | ||
| 379 : | |||
| 380 : | if ($key =~ m/\,/) { | ||
| 381 : | # we have multiple params encoded in a single param | ||
| 382 : | # split them up and add them to the end of the queue | ||
| 383 : | push @paramQueue, map { [ $_, $values ] } split m/\,/, $key; | ||
| 384 : | } elsif ($key =~ m/\:/) { | ||
| 385 : | # we have a whole param encoded in a key | ||
| 386 : | # split it up and add it to the end of the queue | ||
| 387 : | my ($newKey, $newValue) = split m/\:/, $key; | ||
| 388 : | push @paramQueue, [ $newKey, [ $newValue ] ]; | ||
| 389 : | } else { | ||
| 390 : | # this is a "normal" param | ||
| 391 : | # add it to the param list | ||
| 392 : | if (defined $r->param($key)) { | ||
| 393 : | # the param already exists -- append the values we have | ||
| 394 : | $r->param($key => [ $r->param($key), @$values ]); | ||
| 395 : | } else { | ||
| 396 : | # the param doesn't exist -- create it with the values we have | ||
| 397 : | $r->param($key => $values); | ||
| 398 : | } | ||
| 399 : | } | ||
| 400 : | } | ||
| 401 : | } | ||
| 402 : | |||
| 403 : | sh002i | 1565 | =head1 AUTHOR |
| 404 : | |||
| 405 : | sh002i | 1616 | Written by Dennis Lambe, malsyned at math.rochester.edu. Modified by Sam |
| 406 : | Hathaway, sh002i at math.rochester.edu. | ||
| 407 : | sh002i | 1565 | |
| 408 : | =cut | ||
| 409 : | |||
| 410 : | sh002i | 986 | 1; |
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