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# The LearningOnline Network # Login Screen NSDL version # # $Id: lonlogin.pm,v 1.4 2003/08/29 14:50:13 www 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/ # # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14, # 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9, # 1/17/01 Gerd Kortemeyer # # 2/7/02,2/8,2/12,2/14,2/15,2/19 Josh Brunskole # # 7/10/02 Jeremy Bowers package Apache::lonlogin; use strict; use Apache::Constants qw(:common); use Apache::File (); use Apache::lonnet(); use Apache::loncommon(); sub handler { my $r = shift; $r->content_type('text/html'); &Apache::loncommon::no_cache($r); $r->send_http_header; return OK if $r->header_only; &Apache::loncommon::get_unprocessed_cgi ($ENV{'QUERY_STRING'}.'&'.$ENV{'request.querystring'}, ['interface','username','domain','firsturl','localpath','localres']); # ----------------------------------------------------------- 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 $port_to_use=$r->dir_config('lonhttpdPort'); if (!defined($port_to_use)) { $port_to_use='8080'; } my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use. $r->dir_config('lonIconsURL'); my $domain = $r->dir_config('lonDefDomain'); my $role = $r->dir_config('lonRole'); my $loadlim = $r->dir_config('lonLoadLim'); my $servadm = $r->dir_config('lonAdmEMail'); my $sysadm = $r->dir_config('lonSysEMail'); my $lonhost = $r->dir_config('lonHostID'); my $tabdir = $r->dir_config('lonTabDir'); my $include = $r->dir_config('lonIncludes'); my $expire = $r->dir_config('lonExpire'); # --------------------------------------------- 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 $loadpercent=100*$loadavg/$loadlim; my $userloadpercent=&Apache::lonnet::userload(); # ------------------------------------------------------- Do the load balancing my $otherserver='http://'.$ENV{'SERVER_NAME'}; my $firsturl= ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); my $escfirsturl=&Apache::lonnet::escape($firsturl); # ---------------------------------------- Are we access server and overloaded? if (($role eq 'access') && (($userloadpercent>100.0)||($loadpercent>100.0))) { my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); if ($unloaded) { $otherserver=$unloaded; } } # -------------------------------------------------------- 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 $spares=''; foreach (keys %Apache::lonnet::hostname) { if ($_ ne $lonhost) { $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. '/adm/login?domain='.$authdomain.'">'. $Apache::lonnet::hostname{$_}.'</a>'; if ($Apache::lonnet::spareid{$_}) { $spares.=' (preferred)'; } } } $r->print(<<ENDTROUBLE); <html> <head><title>The LearningOnline Network with CAPA</title></head> <body bgcolor="#FFFFFF"> <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> <h3>This LON-CAPA server is temporarily not available for login</h3> <p>Please attempt to login to one of the following servers:</p>$spares <p>If the problem persists, please contact <tt>$servadm</tt>.</p> </body> </html> ENDTROUBLE return OK; } # ----------------------------------------------- Apparently we are in business my $domainlogo=&Apache::loncommon::domainlogo(); $servadm=~s/\,/\<br \/\>/g; $sysadm=~s/\,/\<br \/\>/g; # --------------------------------------------------- Print login screen header $r->print(<<ENDHEADER); <html> <head> <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> <title>The LearningOnline Network with CAPA Login</title> </head> ENDHEADER # ---------------------------------------------------- Serve out DES JavaScript { my $jsh=Apache::File->new($include."/londes.js"); $r->print(<$jsh>); } # ----------------------------------------------------------- Front page design my $pgbg= ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); my $font= ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); my $link= ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); my $vlink= ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); my $alink=&Apache::loncommon::designparm('login.alink'); my $mainbg= ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); my $sidebg= ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); my $logo=&Apache::loncommon::designparm('login.logo'); my $img=&Apache::loncommon::designparm('login.img'); # ---------------------------------------------------------- Serve rest of page $r->print(<<ENDSCRIPT); <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> <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; this.document.server.elements.imagesuppress.value =this.document.client.elements.imagesuppress.checked; this.document.server.elements.embedsuppress.value =this.document.client.elements.embedsuppress.checked; this.document.server.elements.appletsuppress.value =this.document.client.elements.appletsuppress.checked; this.document.server.elements.fontenhance.value =this.document.client.elements.fontenhance.checked; this.document.server.elements.blackwhite.value =this.document.client.elements.blackwhite.checked; this.document.server.elements.remember.value =this.document.client.elements.remember.checked; uextkey=this.document.client.elements.uextkey.value; lextkey=this.document.client.elements.lextkey.value; initkeys(); this.document.server.elements.upass.value =crypted(this.document.client.elements.upass.value); this.document.server.submit(); return false; } </script> ENDSCRIPT if ($fullgraph) { $r->print( '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); } $r->print(<<ENDSERVERFORM); <form name="server" action="$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="interface" value="$ENV{'form.interface'}" /> <input type="hidden" name="uname" value="" /> <input type="hidden" name="upass" value="" /> <input type="hidden" name="udom" value="" /> <input type="hidden" name="imagesuppress" value="" /> <input type="hidden" name="appletsuppress" value="" /> <input type="hidden" name="embedsuppress" value="" /> <input type="hidden" name="fontenhance" value="" /> <input type="hidden" name="blackwhite" value="" /> <input type="hidden" name="remember" value="" /> <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" /> <input type="hidden" name="localres" value="$ENV{'form.localres'}" /> </form> ENDSERVERFORM if ($fullgraph) { $r->print(<<ENDTOP); <!-- The LON-CAPA Header --> <tr> <!-- Row 1 Columns 2-4 --> <td width="100%" colspan=4 bgcolor="$sidebg"><h1><font color="$pgbg">Welcome to the LON-CAPA NSDL Gateway</font></h1><a href="/cgi-bin/signon.pl?$escfirsturl"><h3><font color="$pgbg">Sign up for a Guest Login</font></h3></a></td> </tr> <!-- The gray bar that starts the two table frames --> <tr> <!-- Row 2 Column 1 --> <td width=182 height=27 bgcolor="$sidebg"> </td> <!-- Row 2 Column 2 --> <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> <!-- Row 2 Column 3 --> <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> <!-- Row 2 Column 4 --> <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> </tr> <tr> <!-- A cell that will hold the 'access' and 'about' buttons --> <!-- Row 3 Column 1 --> <td valign="top" height=60 align="center" bgcolor="$sidebg"> <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> <br /> <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> </td> <!-- The shaded space between the two main columns --> <!-- Row 3 Column 2 --> <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> <!-- The right main column holding the large LON-CAPA logo--> <!-- Rows 3-4 Column 3 --> <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> <center> <img src="$logo" alt="" /> </center> </td> <!-- Row 3 Column 4 --> <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> </tr> <tr> <!-- The entry form --> <!-- Row 4 Column 1 --> <td align="center" valign="middle" bgcolor="$sidebg"> ENDTOP } else { $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); } $r->print('<form name="client" onsubmit="return(send())">'); unless ($fullgraph) { $r->print(<<ENDACCESSOPTIONS); <h3>Select Accessibility Options</h3> <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> <input type="checkbox" name="fontenhance" /> Increase font size<br /> <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> <p>If you have accessibility needs that are not addressed by this interface, please contact the system administrator at <tt>$sysadm</tt>.</p><br /> <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> ENDACCESSOPTIONS } else { $r->print(<<ENDNOOPT); <input type="hidden" name="imagesuppress" value="" /> <input type="hidden" name="embedsuppress" value="" /> <input type="hidden" name="appletsuppress" value="" /> <input type="hidden" name="fontenhance" value="" /> <input type="hidden" name="blackwhite" value="" /> <input type="hidden" name="remember" value="" /> ENDNOOPT } $r->print(<<ENDLOGIN); <input type="hidden" name="lextkey" value="$lextkey"> <input type="hidden" name="uextkey" value="$uextkey"> <!-- Start the sub-table for text and input alignment --> <table border=0 cellspacing=0 cellpadding=0> <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> <tr> <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td> <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> </tr> <tr> <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td> <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> </tr> <tr> <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td> <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> </tr> <tr> <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td> <td bgcolor="$mainbg" valign="bottom" align="center"> <br /> <input type="submit" value="Log In" /> </td> </tr> </table> <!-- End sub-table --> </form> ENDLOGIN if ($fullgraph) { $r->print(<<ENDDOCUMENT); </td> <!-- Row 4 Column 2 --> <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> <!-- Row 4 Column 4 --> <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> </tr> <tr> <!-- Row 5 Column 1 --> <td bgcolor="$sidebg" valign="middle" align="left"> <br /> <table border=0 cellspacing=0 cellpadding=0> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b> Domain: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $domain</tt></small> </td> </tr> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b> Server: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $lonhost ($role)</tt></small> </td> </tr> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b> Load: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $loadpercent percent</tt></small> </td> </tr> <tr> <td bgcolor="$sidebg" align="left" valign="top"> <small><b> User Load: </b></small> </td> <td bgcolor="$sidebg" align="left" valign="top"> <small><tt> $userloadpercent percent</tt></small> </td> </tr> </table> <br /> <small> <b> System Administration:</b><br /> <tt> $sysadm</tt><br /> <b> Server Administration:</b><br /> <tt> $servadm<br /> </tt> </small> </td> <!-- Row 5 Column 2 --> <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> <!-- Row 5 Column 3 --> <td width="100%" valign="bottom" bgcolor="$mainbg"> $domainlogo </td> <!-- Row 5 Column 4 --> <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> </tr> <tr> <!-- Row 6 Column 1 --> <td bgcolor="$sidebg"> </td> <!-- Row 6 Column 2 --> <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> <!-- Row 6 Column 3 --> <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> <!-- Row 6 Column 4 --> <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> </tr> </table> <script> // the if prevents the script error if the browser can't handle this if ( document.client.uname ) { document.client.uname.focus(); } </script> ENDDOCUMENT } $r->print('</body></html>'); return OK; } 1; __END__