loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.25: download - view: text, annotated - select for diffs
Mon Oct 14 16:14:58 2002 UTC (21 years, 7 months ago) by bowersj2
Branches: MAIN
CVS tags: HEAD

Fixing a pet peeve: When you go to the login screen, the focus will now
be automatically sent to the username box, if the browser supports it. The
"if" statement should prevent any script errors. I was worried Netscape 4
wouldn't work, but lo, it does. Not tested in IE but I see no reason this won't
work.

This means you can now login in with the keyboard sequence
"usernameTABpasswordENTER", which can't be optimized any more.

It's the little things... and commit messages five times the size of the
code committed... that make all the difference.

# The LearningOnline Network # Login Screen # # $Id: lonlogin.pm,v 1.25 2002/10/14 16:14:58 bowersj2 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'},['interface']); $ENV{'form.interface'}=~s/\W//g; my $fullgraph=($ENV{'form.interface'} ne 'textual'); my $iconpath= $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 $loadavg; { my $loadfile=Apache::File->new('/proc/loadavg'); $loadavg=<$loadfile>; } $loadavg =~ s/\s.*//g; my $loadpercent=100*$loadavg/$loadlim; my $otherserver='http://'.$ENV{'SERVER_NAME'}; my $firsturl=$ENV{'request.firsturl'}; # ---------------------------------------- Are we access server and overloaded? if (($role eq 'access') && ($loadpercent>100.0)) { $otherserver=Apache::lonnet::spareserver($loadpercent); } # -------------------------------------------------------- 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; } my $logtoken=Apache::lonnet::reply( 'tmpput:'.$ukey.$lkey.'&'.$firsturl, $lonhost); my $domainlogo=&Apache::loncommon::domainlogo(); # --------------------------------------------------- Print login screen header $r->print(<<ENDHEADER); <html> <head> <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=&Apache::loncommon::designparm('login.pgbg'); my $font=&Apache::loncommon::designparm('login.font'); my $link=&Apache::loncommon::designparm('login.link'); my $vlink=&Apache::loncommon::designparm('login.vlink'); my $alink=&Apache::loncommon::designparm('login.alink'); my $mainbg=&Apache::loncommon::designparm('login.mainbg'); my $sidebg=&Apache::loncommon::designparm('login.sidebg'); 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" onLoad="init();" 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; 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="$ENV{'form.interface'}"> <input type=hidden name=uname value=""> <input type=hidden name=upass value=""> <input type=hidden name=udom value=""> </form> ENDSERVERFORM if ($fullgraph) { $r->print(<<ENDTOP);  <tr>  <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="#006600"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> </tr>  <tr>  <td width=182 height=27 bgcolor="$sidebg"> </td>  <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>  <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>  <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> </tr> <tr>   <td valign="top" height=60 align="center" bgcolor="$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>   <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>   <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> <center> <img src="$logo" alt="" /> </center> </td>  <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> </tr> <tr>   <td align="center" valign="middle" bgcolor="$sidebg"> ENDTOP } $r->print(<<ENDLOGIN); <form name="client" onsubmit="return(send())"> <input type="hidden" name="lextkey" value="$lextkey"> <input type="hidden" name="uextkey" value="$uextkey">  <table border=0 cellspacing=0 cellpadding=0> <tr><td bgcolor="$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="$mainbg"><br /><input type="text" name="uname" size="10" /></td> </tr> <tr> <td bgcolor="$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="$mainbg"><input type="text" name="udom" size="10" value=$domain /></td> </tr> <tr> <td bgcolor="$mainbg" valign="bottom" align="center" colspan=2> <br /> <input type="submit" value="Log In" /> </td> </tr> </table>  </form> ENDLOGIN if ($fullgraph) { $r->print(<<ENDDOCUMENT); </td>  <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>  <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> </tr> <tr>  <td bgcolor="$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> </table> <br /> <small> <b>   System Administration:</b><br /> <tt>      $sysadm</tt><br /> <b>   Server Administration:</b><br /> <tt>      $servadm<br /> </tt> </small> </td>  <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>  <td width="100%" valign="bottom" bgcolor="$mainbg"> $domainlogo </td>  <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> </tr> <tr>  <td bgcolor="$sidebg"> </td>  <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>  <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>  <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__