loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.45: download - view: text, annotated - select for diffs
Tue Aug 12 19:46:04 2003 UTC (20 years, 9 months ago) by www
Branches: MAIN
CVS tags: HEAD

Bug #815: Frontpage announcements can now be entered by
Superusers and Domain Coordinators
on a per-machine-base from "CLDR (Calendar/Announce)".

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.45 2003/08/12 19:46:04 www Exp $ 5: # 6: # Copyright Michigan State University Board of Trustees 7: # 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 9: # 10: # LON-CAPA is free software; you can redistribute it and/or modify 11: # it under the terms of the GNU General Public License as published by 12: # the Free Software Foundation; either version 2 of the License, or 13: # (at your option) any later version. 14: # 15: # LON-CAPA is distributed in the hope that it will be useful, 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18: # GNU General Public License for more details. 19: # 20: # You should have received a copy of the GNU General Public License 21: # along with LON-CAPA; if not, write to the Free Software 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23: # 24: # /home/httpd/html/adm/gpl.txt 25: # 26: # http://www.lon-capa.org/ 27: # 28: # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14, 29: # 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9, 30: # 1/17/01 Gerd Kortemeyer 31: # 32: # 2/7/02,2/8,2/12,2/14,2/15,2/19 Josh Brunskole 33: # 34: # 7/10/02 Jeremy Bowers 35: 36: package Apache::lonlogin; 37: 38: use strict; 39: use Apache::Constants qw(:common); 40: use Apache::File (); 41: use Apache::lonnet(); 42: use Apache::loncommon(); 43: 44: sub handler { 45: my $r = shift; 46: $r->content_type('text/html'); 47: &Apache::loncommon::no_cache($r); 48: $r->send_http_header; 49: return OK if $r->header_only; 50: 51: 52: &Apache::loncommon::get_unprocessed_cgi 53: ($ENV{'QUERY_STRING'}.'&'.$ENV{'request.querystring'}, 54: ['interface','username','domain','firsturl','localpath','localres']); 55: 56: # ----------------------------------------------------------- Process Interface 57: $ENV{'form.interface'}=~s/\W//g; 58: 59: my $textbrowsers=$r->dir_config('lonTextBrowsers'); 60: my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; 61: 62: foreach (split(/\:/,$textbrowsers)) { 63: if ($httpbrowser=~/$_/i) { 64: $ENV{'form.interface'}='textual'; 65: } 66: } 67: 68: my $fullgraph=($ENV{'form.interface'} ne 'textual'); 69: my $port_to_use=$r->dir_config('lonhttpdPort'); 70: if (!defined($port_to_use)) { 71: $port_to_use='8080'; 72: } 73: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use. 74: $r->dir_config('lonIconsURL'); 75: my $domain = $r->dir_config('lonDefDomain'); 76: my $role = $r->dir_config('lonRole'); 77: my $loadlim = $r->dir_config('lonLoadLim'); 78: my $servadm = $r->dir_config('lonAdmEMail'); 79: my $sysadm = $r->dir_config('lonSysEMail'); 80: my $lonhost = $r->dir_config('lonHostID'); 81: my $tabdir = $r->dir_config('lonTabDir'); 82: my $include = $r->dir_config('lonIncludes'); 83: my $expire = $r->dir_config('lonExpire'); 84: my $version = $r->dir_config('lonVersion'); 85: 86: # --------------------------------------------- Default values for login fields 87: 88: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 89: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 90: 91: # ---------------------------------------------------------- Determine own load 92: my $loadavg; 93: { 94: my $loadfile=Apache::File->new('/proc/loadavg'); 95: $loadavg=<$loadfile>; 96: } 97: $loadavg =~ s/\s.*//g; 98: my $loadpercent=100*$loadavg/$loadlim; 99: my $userloadpercent=&Apache::lonnet::userload(); 100: 101: # ------------------------------------------------------- Do the load balancing 102: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 103: my $firsturl= 104: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 105: # ---------------------------------------- Are we access server and overloaded? 106: if (($role eq 'access') && 107: (($userloadpercent>100.0)||($loadpercent>100.0))) { 108: $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 109: } 110: 111: # ----------------------------------------------------------- Get announcements 112: my $announcements=&Apache::lonnet::getannounce(); 113: # -------------------------------------------------------- Set login parameters 114: 115: my @hexstr=('0','1','2','3','4','5','6','7', 116: '8','9','a','b','c','d','e','f'); 117: my $lkey=''; 118: for (0..7) { 119: $lkey.=$hexstr[rand(15)]; 120: } 121: 122: my $ukey=''; 123: for (0..7) { 124: $ukey.=$hexstr[rand(15)]; 125: } 126: 127: my $lextkey=hex($lkey); 128: if ($lextkey>2147483647) { $lextkey-=4294967296; } 129: 130: my $uextkey=hex($ukey); 131: if ($uextkey>2147483647) { $uextkey-=4294967296; } 132: 133: # -------------------------------------------------------- Store away log token 134: my $logtoken=Apache::lonnet::reply( 135: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 136: $lonhost); 137: 138: # ------------------- If we cannot talk to ourselves, we are in serious trouble 139: 140: if ($logtoken eq 'con_lost') { 141: my $spares=''; 142: foreach (keys %Apache::lonnet::hostname) { 143: if ($_ ne $lonhost) { 144: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 145: '/adm/login?domain='.$authdomain.'">'. 146: $Apache::lonnet::hostname{$_}.'</a>'; 147: if ($Apache::lonnet::spareid{$_}) { 148: $spares.=' (preferred)'; 149: } 150: } 151: } 152: $r->print(<<ENDTROUBLE); 153: <html> 154: <head><title>The LearningOnline Network with CAPA</title></head> 155: <body bgcolor="#FFFFFF"> 156: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 157: <h3>This LON-CAPA server is temporarily not available for login</h3> 158: <p>Please attempt to login to one of the following servers:</p>$spares 159: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 160: </body> 161: </html> 162: ENDTROUBLE 163: return OK; 164: } 165: 166: # ----------------------------------------------- Apparently we are in business 167: 168: my $domainlogo=&Apache::loncommon::domainlogo(); 169: $servadm=~s/\,/\<br \/\>/g; 170: $sysadm=~s/\,/\<br \/\>/g; 171: 172: # --------------------------------------------------- Print login screen header 173: $r->print(<<ENDHEADER); 174: <html> 175: <head> 176: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 177: <title>The LearningOnline Network with CAPA Login</title> 178: </head> 179: ENDHEADER 180: # ---------------------------------------------------- Serve out DES JavaScript 181: { 182: my $jsh=Apache::File->new($include."/londes.js"); 183: $r->print(<$jsh>); 184: } 185: 186: # ----------------------------------------------------------- Front page design 187: my $pgbg= 188: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 189: my $font= 190: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 191: my $link= 192: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 193: my $vlink= 194: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 195: my $alink=&Apache::loncommon::designparm('login.alink'); 196: my $mainbg= 197: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 198: my $sidebg= 199: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 200: my $logo=&Apache::loncommon::designparm('login.logo'); 201: my $img=&Apache::loncommon::designparm('login.img'); 202: 203: 204: # ---------------------------------------------------------- Serve rest of page 205: $r->print(<<ENDSCRIPT); 206: 207: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 208: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 209: 210: <script language="JavaScript"> 211: function send() 212: { 213: this.document.server.elements.uname.value 214: =this.document.client.elements.uname.value; 215: 216: this.document.server.elements.udom.value 217: =this.document.client.elements.udom.value; 218: 219: this.document.server.elements.imagesuppress.value 220: =this.document.client.elements.imagesuppress.checked; 221: 222: this.document.server.elements.embedsuppress.value 223: =this.document.client.elements.embedsuppress.checked; 224: 225: this.document.server.elements.appletsuppress.value 226: =this.document.client.elements.appletsuppress.checked; 227: 228: this.document.server.elements.fontenhance.value 229: =this.document.client.elements.fontenhance.checked; 230: 231: this.document.server.elements.blackwhite.value 232: =this.document.client.elements.blackwhite.checked; 233: 234: this.document.server.elements.remember.value 235: =this.document.client.elements.remember.checked; 236: 237: uextkey=this.document.client.elements.uextkey.value; 238: lextkey=this.document.client.elements.lextkey.value; 239: initkeys(); 240: 241: this.document.server.elements.upass.value 242: =crypted(this.document.client.elements.upass.value); 243: 244: this.document.server.submit(); 245: return false; 246: } 247: </script> 248: ENDSCRIPT 249: 250: if ($fullgraph) { 251: $r->print( 252: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 253: } 254: 255: $r->print(<<ENDSERVERFORM); 256: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 257: <input type="hidden" name="logtoken" value="$logtoken" /> 258: <input type="hidden" name="serverid" value="$lonhost" /> 259: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 260: <input type="hidden" name="uname" value="" /> 261: <input type="hidden" name="upass" value="" /> 262: <input type="hidden" name="udom" value="" /> 263: <input type="hidden" name="imagesuppress" value="" /> 264: <input type="hidden" name="appletsuppress" value="" /> 265: <input type="hidden" name="embedsuppress" value="" /> 266: <input type="hidden" name="fontenhance" value="" /> 267: <input type="hidden" name="blackwhite" value="" /> 268: <input type="hidden" name="remember" value="" /> 269: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" /> 270: <input type="hidden" name="localres" value="$ENV{'form.localres'}" /> 271: </form> 272: ENDSERVERFORM 273: if ($fullgraph) { $r->print(<<ENDTOP); 274:  275: <tr> 276: 277:  278: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 279: </tr> 280: 281:  282: <tr> 283: 284:  285: <td width=182 height=27 bgcolor="$sidebg"> </td> 286: 287:  288: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 289: 290:  291: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 292: 293:  294: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 295: </tr> 296: <tr> 297: 298:  299:  300: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 301: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 302: <br /> 303: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 304: </td> 305: 306:  307:  308: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 309: 310:  311:  312: <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg"> 313: <center> 314: <img src="$logo" alt="" /> 315: </center> 316: </td> 317: 318:  319: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 320: </tr> 321: <tr> 322: 323:  324:  325: <td align="center" valign="middle" bgcolor="$sidebg"> 326: ENDTOP 327: } else { 328: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements); 329: } 330: $r->print('<form name="client" onsubmit="return(send())">'); 331: unless ($fullgraph) { 332: $r->print(<<ENDACCESSOPTIONS); 333: <h3>Select Accessibility Options</h3> 334: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 335: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 336: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 337: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 338: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 339: <p>If you have accessibility needs that are not addressed by this interface, 340: please 341: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 342: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 343: ENDACCESSOPTIONS 344: } else { 345: $r->print(<<ENDNOOPT); 346: <input type="hidden" name="imagesuppress" value="" /> 347: <input type="hidden" name="embedsuppress" value="" /> 348: <input type="hidden" name="appletsuppress" value="" /> 349: <input type="hidden" name="fontenhance" value="" /> 350: <input type="hidden" name="blackwhite" value="" /> 351: <input type="hidden" name="remember" value="" /> 352: ENDNOOPT 353: } 354: $r->print(<<ENDLOGIN); 355: <input type="hidden" name="lextkey" value="$lextkey"> 356: <input type="hidden" name="uextkey" value="$uextkey"> 357: 358:  359: <table border=0 cellspacing=0 cellpadding=0> 360: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 361: <tr> 362: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 363: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 364: </tr> 365: <tr> 366: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 367: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 368: </tr> 369: <tr> 370: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 371: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 372: </tr> 373: <tr> 374: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 375: <td bgcolor="$mainbg" valign="bottom" align="center"> 376: <br /> 377: <input type="submit" value="Log In" /> 378: </td> 379: </tr> 380: </table> 381:  382: </form> 383: ENDLOGIN 384: if ($fullgraph) { 385: $r->print(<<ENDDOCUMENT); 386: </td> 387: 388:  389: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 390: 391:  392: <td bgcolor="$mainbg">$announcements</td> 393: 394:  395: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 396: </tr> 397: <tr> 398: 399:  400: <td bgcolor="$sidebg" valign="middle" align="left"> 401: <br /> 402: <table border=0 cellspacing=0 cellpadding=0> 403: <tr> 404: <td bgcolor="$sidebg" align="left" valign="top"> 405: <small><b>   Domain: </b></small> 406: </td> 407: <td bgcolor="$sidebg" align="left" valign="top"> 408: <small><tt> $domain</tt></small> 409: </td> 410: </tr> 411: <tr> 412: <td bgcolor="$sidebg" align="left" valign="top"> 413: <small><b>   Server: </b></small> 414: </td> 415: <td bgcolor="$sidebg" align="left" valign="top"> 416: <small><tt> $lonhost ($role)</tt></small> 417: </td> 418: </tr> 419: <tr> 420: <td bgcolor="$sidebg" align="left" valign="top"> 421: <small><b>   Load: </b></small> 422: </td> 423: <td bgcolor="$sidebg" align="left" valign="top"> 424: <small><tt> $loadpercent percent</tt></small> 425: </td> 426: </tr> 427: <tr> 428: <td bgcolor="$sidebg" align="left" valign="top"> 429: <small><b>   User Load: </b></small> 430: </td> 431: <td bgcolor="$sidebg" align="left" valign="top"> 432: <small><tt> $userloadpercent percent</tt></small> 433: </td> 434: </tr> 435: </table> 436: <br /> 437: <small> 438: <b>   System Administration:</b><br /> 439: <tt>      $sysadm</tt><br /> 440: <b>   Server Administration:</b><br /> 441: <tt>      $servadm</tt><br /> <br /> 442:    $version 443: </small> 444: </td> 445: 446:  447: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 448: 449:  450: <td width="100%" valign="bottom" bgcolor="$mainbg"> 451: $domainlogo 452: </td> 453: 454:  455: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 456: </tr> 457: <tr> 458: 459:  460: <td bgcolor="$sidebg"> </td> 461: 462:  463: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 464: 465:  466: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 467: 468:  469: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 470: </tr> 471: </table> 472: 473: <script> 474: // the if prevents the script error if the browser can't handle this 475: if ( document.client.uname ) { document.client.uname.focus(); } 476: </script> 477: 478: ENDDOCUMENT 479: } 480: $r->print('</body></html>'); 481: return OK; 482: } 483: 484: 1; 485: __END__