loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.107: download - view: text, annotated - select for diffs
Sat Nov 22 19:07:02 2008 UTC (15 years, 5 months ago) by tempelho
Branches: MAIN
CVS tags: HEAD

Removing the Accessibility Options. Redesigning the page.

# The LearningOnline Network # Login Screen # # $Id: lonlogin.pm,v 1.107 2008/11/22 19:07:02 tempelho Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # package Apache::lonlogin; use strict; use Apache::Constants qw(:common); use Apache::File (); use Apache::lonnet; use Apache::loncommon(); use Apache::lonauth(); use Apache::lonlocal; use Apache::migrateuser(); use lib '/home/httpd/lib/perl/'; use LONCAPA; sub handler { my $r = shift; &Apache::loncommon::get_unprocessed_cgi (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'}, $ENV{'REDIRECT_QUERY_STRING'}), ['interface','username','domain','firsturl','localpath','localres', 'token']); if (!defined($env{'form.firsturl'})) { &Apache::lonacc::get_posted_cgi($r,['firsturl']); } # -- check if they are a migrating user if (defined($env{'form.token'})) { return &Apache::migrateuser::handler($r); } &Apache::loncommon::no_cache($r); &Apache::lonlocal::get_language_handle($r); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; return OK if $r->header_only; # Are we re-routing? if (-e '/home/httpd/html/lon-status/reroute.txt') { &Apache::lonauth::reroute($r); return OK; } # -------------------------------- Prevent users from attempting to login twice my $handle = &Apache::lonnet::check_for_valid_session($r); if ($handle=~/^publicuser\_/) { # For "public user" - remove it, we apparently really want to login unlink($r->dir_config('lonIDsDir')."/$handle.id"); } elsif ($handle ne '') { # Indeed, a valid token is found my $start_page = &Apache::loncommon::start_page('Already logged in'); my $end_page = &Apache::loncommon::end_page(); $r->print( $start_page .'<h1>'.&mt('You are already logged in!').'</h1>' .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]logout[_4].', '<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>').'</p>' .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>' .$end_page ); return OK; } # ---------------------------------------------------- No valid token, continue # ---------------------------- Not possible to really login to domain "public" if ($env{'form.domain'} eq 'public') { $env{'form.domain'}=''; $env{'form.username'}=''; } # ----------------------------------------------------------- Process Interface $env{'form.interface'}=~s/\W//g; # my $textbrowsers=$r->dir_config('lonTextBrowsers'); my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; # foreach (split(/\:/,$textbrowsers)) { # if ($httpbrowser=~/$_/i) { # $env{'form.interface'}='textual'; # } # } my $fullgraph=($env{'form.interface'} ne 'textual'); my $iconpath= &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL')); my $domain = &Apache::lonnet::default_login_domain(); if (($env{'form.domain'}) && (&Apache::lonnet::domain($env{'form.domain'},'description'))) { $domain=$env{'form.domain'}; } my $role = $r->dir_config('lonRole'); my $loadlim = $r->dir_config('lonLoadLim'); my $servadm = $r->dir_config('lonAdmEMail'); my $lonhost = $r->dir_config('lonHostID'); my $tabdir = $r->dir_config('lonTabDir'); my $include = $r->dir_config('lonIncludes'); my $expire = $r->dir_config('lonExpire'); my $version = $r->dir_config('lonVersion'); my $host_name = &Apache::lonnet::hostname($lonhost); # --------------------------------------------- Default values for login fields my $authusername=($env{'form.username'}?$env{'form.username'}:''); my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain); # ---------------------------------------------------------- Determine own load my $loadavg; { my $loadfile=Apache::File->new('/proc/loadavg'); $loadavg=<$loadfile>; } $loadavg =~ s/\s.*//g; my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); my $userloadpercent=&Apache::lonnet::userload(); # ------------------------------------------------------- Do the load balancing my $otherserver= &Apache::lonnet::absolute_url($host_name); my $firsturl= ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'}); # ---------------------------------------------------------- Are we overloaded? if ((($userloadpercent>100.0)||($loadpercent>100.0))) { my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); if ($unloaded) { $otherserver=$unloaded; } } # ----------------------------------------------------------- Get announcements my $announcements=&Apache::lonnet::getannounce(); # -------------------------------------------------------- Set login parameters my @hexstr=('0','1','2','3','4','5','6','7', '8','9','a','b','c','d','e','f'); my $lkey=''; for (0..7) { $lkey.=$hexstr[rand(15)]; } my $ukey=''; for (0..7) { $ukey.=$hexstr[rand(15)]; } my $lextkey=hex($lkey); if ($lextkey>2147483647) { $lextkey-=4294967296; } my $uextkey=hex($ukey); if ($uextkey>2147483647) { $uextkey-=4294967296; } # -------------------------------------------------------- Store away log token my $logtoken=Apache::lonnet::reply( 'tmpput:'.$ukey.$lkey.'&'.$firsturl, $lonhost); # ------------------- If we cannot talk to ourselves, we are in serious trouble if ($logtoken eq 'con_lost') { my $spares=''; my $last; foreach my $hostid (sort { &Apache::lonnet::hostname($a) cmp &Apache::lonnet::hostname($b); } keys(%Apache::lonnet::spareid)) { next if ($hostid eq $lonhost); my $hostname = &Apache::lonnet::hostname($hostid); next if ($last eq $hostname); $spares.='<br /><font size="+1"><a href="http://'. $hostname. '/adm/login?domain='.$authdomain.'">'. $hostname.'</a>'. ' '.&mt('(preferred)').'</font>'.$/; $last=$hostname; } $spares.= '<br />'; my %all_hostnames = &Apache::lonnet::all_hostnames(); foreach my $hostid (sort { &Apache::lonnet::hostname($a) cmp &Apache::lonnet::hostname($b); } keys(%all_hostnames)) { next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid}); my $hostname = &Apache::lonnet::hostname($hostid); next if ($last eq $hostname); $spares.='<br /><a href="http://'. $hostname. '/adm/login?domain='.$authdomain.'">'. $hostname.'</a>'; $last=$hostname; } $r->print( '<html>' .'<head><title>' .&mt('The LearningOnline Network with CAPA') .'</title></head>' .'<body bgcolor="#FFFFFF">' .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>' .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />' .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>' .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>' .$spares .'</body>' .'</html>' ); return OK; } # ----------------------------------------------- Apparently we are in business $servadm=~s/\,/\<br \/\>/g; # ----------------------------------------------------------- Front page design my $pgbg= ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF'); my $font= ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000'); my $link= ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF'); my $vlink= ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF'); my $alink=&Apache::loncommon::designparm('login.alink',$domain); my $mainbg= ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF'); my $sidebg= ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF'); my $textcol = ($fullgraph?&Apache::loncommon::designparm('login.textcol',$domain):'#000000'); my $bgcol = ($fullgraph?&Apache::loncommon::designparm('login.bgcol',$domain):'#FFFFFF'); my $logo=&Apache::loncommon::designparm('login.logo',$domain); my $img=&Apache::loncommon::designparm('login.img',$domain); my $domainlogo=&Apache::loncommon::domainlogo($domain); my $login=&Apache::loncommon::designparm('login.login',$domain); if ($login eq '') { $login = $iconpath.'/'.&mt('userauthentication.gif'); } my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain); my $showcoursecat = &Apache::loncommon::designparm('login.coursecatalog',$domain); my $loginheader =&Apache::loncommon::designparm('login.loginheader',$domain); my $shownewuserlink = &Apache::loncommon::designparm('login.newuser',$domain); my $now=time; my $js = (<<ENDSCRIPT); <script language="JavaScript"> function send() { this.document.server.elements.uname.value =this.document.client.elements.uname.value; this.document.server.elements.udom.value =this.document.client.elements.udom.value; uextkey=this.document.client.elements.uextkey.value; lextkey=this.document.client.elements.lextkey.value; initkeys(); this.document.server.elements.upass0.value =crypted(this.document.client.elements.upass$now.value.substr(0,15)); this.document.server.elements.upass1.value =crypted(this.document.client.elements.upass$now.value.substr(15,15)); this.document.server.elements.upass2.value =crypted(this.document.client.elements.upass$now.value.substr(30,15)); this.document.client.elements.uname.value=''; this.document.client.elements.upass$now.value=''; this.document.server.submit(); return false; } </script> ENDSCRIPT # --------------------------------------------------- Print login screen header my %add_entries = (topmargin => "0", leftmargin => "0", marginheight => "0", marginwidth => "0", bgcolor => "$pgbg", text => "$font", link => "$link", vlink => "$vlink", alink => "$alink",); $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js, { 'redirect' => [$expire,'/adm/roles'], 'add_entries' => \%add_entries, 'only_body' => 1,})); # ----------------------------------------------------------------------- Texts my %lt=&Apache::lonlocal::texthash( 'un' => 'Username', 'pw' => 'Password', 'dom' => 'Domain', 'perc' => 'percent', 'load' => 'Server Load', 'userload' => 'User Load', 'about' => 'About LON-CAPA', 'catalog' => 'Course Catalog', 'log' => 'Log in', 'help' => 'Log-in Help', 'serv' => 'Server', 'servadm' => 'Server Administration', 'helpdesk' => 'Contact Helpdesk', 'forgotpw' => 'Forgot password?', 'newuser' => 'New User?', 'options_headline' => 'Select Accessibility Options', 'sprs_img' => 'Suppress rendering of images', 'sprs_applet' => 'Suppress Java applets', 'sprs_embed' => 'Suppress rendering of embedded multimedia', 'sprs_font' => 'Increase font size', 'sprs_blackwhite' => 'Switch to black and white mode', 'remember' => 'Remember these settings for next login'); # -------------------------------------------------- Change password field name my $forgotpw = &forgotpwdisplay(%lt); my $loginhelp = &loginhelpdisplay(%lt); # ---------------------------------------------------- Serve out DES JavaScript { my $jsh=Apache::File->new($include."/londes.js"); $r->print(<$jsh>); } # ---------------------------------------------------------- Serve rest of page if ($fullgraph) { $r->print( '<div class="LC_loginpage_container">'); } $r->print(<<ENDSERVERFORM); <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> <input type="hidden" name="logtoken" value="$logtoken" /> <input type="hidden" name="serverid" value="$lonhost" /> <input type="hidden" name="uname" value="" /> <input type="hidden" name="upass0" value="" /> <input type="hidden" name="upass1" value="" /> <input type="hidden" name="upass2" value="" /> <input type="hidden" name="udom" value="" /> <input type="hidden" name="localpath" value="$env{'form.localpath'}" /> <input type="hidden" name="localres" value="$env{'form.localres'}" /> </form> ENDSERVERFORM my $coursecatalog; if (($showcoursecat eq '') || ($showcoursecat)) { $coursecatalog = &coursecatalog_link($lt{'catalog'}); } my $newuserlink; if ($shownewuserlink) { $newuserlink = &newuser_link($lt{'newuser'}); } my $logintitle; if ($loginheader eq 'text') { $logintitle = $lt{'log'}; } else { $logintitle = '<img src="'.$login.'" alt="'. &mt('User Authentication').'" />'; } my $noscript_warning='<noscript>' .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.') .'</noscript>'; my $helpdeskscript; my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail, $version,$authdomain,\$helpdeskscript); if ($fullgraph) { $r->print(<<ENDTOP);  <table border="0" align="left" width="100%" cellspacing="0" cellpadding="1"> <tr> <td align="left" valign="top" bgcolor="$pgbg"> <img src="$img" border=0 alt="The Learning Online Network with CAPA" /> </td> </tr> </table> <div class="LC_loginpage_space"> </div> <img src="$logo" alt="" /> <div class="LC_loginpage_loginContainer"><fieldset class="LC_loginpage_fieldset"> <legend class="LC_loginpage_legend">$logintitle</legend> <table border="0" align="left" cellspacing="1" cellpadding="1" width="100%"> <tr> <td width="50%" align="center" valign="top">$domainlogo</td> <td> ENDTOP $r->print('<form name="client" onsubmit="return(send())">'); $r->print(<<ENDTOPP) <input type="hidden" name="lextkey" value="$lextkey"> <input type="hidden" name="uextkey" value="$uextkey"> <b><label for="uname">$lt{'un'}</label>:</b><br /> <input type="text" name="uname" size="10" value="$authusername" /><br /> <b><label for="upass$now">$lt{'pw'}</label>:</b><br /> <input type="password" name="upass$now" size="10" /><br /> <b><label for="udom">$lt{'dom'}</label>:</b><br /> <input type="text" name="udom" size="10" value="$authdomain" /><br /> <input type="submit" value="$lt{'log'}" /> </form> </td> </tr> </table> $noscript_warning </fieldset></div> <div class="LC_loginpage_loginInfo"> $loginhelp<br /> $forgotpw<br /><br /> $newuserlink<br /> $coursecatalog<br /><br /> <a href="/adm/about.html"><b>$lt{'about'}</b></a><br /> $helpdeskscript </div> <div class="LC_loginpage_space"> </div> $announcements ENDTOPP } if($announcements){$r->print('<div class="LC_loginpage_space"> </div>');} if ($fullgraph) { $r->print(<<ENDDOCUMENT); <table border=0 cellspacing=0 cellpadding=0> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b>   $lt{'dom'}: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $domain</tt></small> </td> </tr> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b>   $lt{'serv'}: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $lonhost ($role)</tt></small> </td> </tr> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b>   $lt{'load'}: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $loadpercent $lt{'perc'}</tt></small> </td> </tr> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b>   $lt{'userload'}: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $userloadpercent $lt{'perc'}</tt></small> </td> </tr> </table> $contactblock </div> <script type="text/javascript"> // the if prevents the script error if the browser can not handle this if ( document.client.uname ) { document.client.uname.focus(); } </script> $helpdeskscript ENDDOCUMENT } my %endargs = ( 'noredirectlink' => 1, ); $r->print(&Apache::loncommon::end_page(\%endargs)); return OK; } sub contactdisplay { my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_; my $contactblock; my $showhelpdesk = 0; my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) { $showhelpdesk = 1; } if ($servadm && $showadminmail) { $contactblock .= '<b>   '.$$lt{'servadm'}.':</b><br />'. '<tt>      '.$servadm.'</tt><br /> <br />'; } if ($showhelpdesk) { $contactblock .= '<b>   <a href="javascript:helpdesk()"><font size="+1">'.$lt->{'helpdesk'}.'</font></a></b><br />'; my $thisurl = &escape('/adm/login'); $$helpdeskscript = <<"ENDSCRIPT"; <script type="text/javascript"> function helpdesk() { var codedom = document.client.udom.value; if (codedom == '') { codedom = "$authdomain"; } var querystr = "origurl=$thisurl&codedom="+codedom; document.location.href = "/adm/helpdesk?"+querystr; return; } </script> ENDSCRIPT } $contactblock .= <<"ENDBLOCK";    $version ENDBLOCK return $contactblock; } sub forgotpwdisplay { my (%lt) = @_; my $prompt_for_resetpw = 1; if ($prompt_for_resetpw) { return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>'; } return; } sub loginhelpdisplay { my (%lt) = @_; my $login_help = 1; if ($login_help) { return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>'; } return; } sub coursecatalog_link { my ($linkname) = @_; return <<"END"; <a href="/adm/coursecatalog">$linkname</a> END } sub newuser_link { my ($linkname) = @_; return '   <a href="/adm/createaccount"><b>'.$linkname.'</b></a><br />'; } 1; __END__