loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.42: download - view: text, annotated - select for diffs
Thu May 8 22:23:19 2003 UTC (21 years ago) by albertel
Branches: MAIN
CVS tags: version_0_99_3, version_0_99_2, version_0_99_1, version_0_99_0, conference_2003, HEAD

- put user load on front page
- make userload pretty

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.42 2003/05/08 22:23:19 albertel 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']); 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: 85: # --------------------------------------------- Default values for login fields 86: 87: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 88: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 89: 90: # ---------------------------------------------------------- Determine own load 91: my $loadavg; 92: { 93: my $loadfile=Apache::File->new('/proc/loadavg'); 94: $loadavg=<$loadfile>; 95: } 96: $loadavg =~ s/\s.*//g; 97: my $loadpercent=100*$loadavg/$loadlim; 98: my $userloadpercent=&Apache::lonnet::userload(); 99: 100: # ------------------------------------------------------- Do the load balancing 101: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 102: my $firsturl= 103: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 104: # ---------------------------------------- Are we access server and overloaded? 105: if (($role eq 'access') && 106: (($userloadpercent>100.0)||($loadpercent>100.0))) { 107: $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 108: } 109: 110: # -------------------------------------------------------- Set login parameters 111: 112: my @hexstr=('0','1','2','3','4','5','6','7', 113: '8','9','a','b','c','d','e','f'); 114: my $lkey=''; 115: for (0..7) { 116: $lkey.=$hexstr[rand(15)]; 117: } 118: 119: my $ukey=''; 120: for (0..7) { 121: $ukey.=$hexstr[rand(15)]; 122: } 123: 124: my $lextkey=hex($lkey); 125: if ($lextkey>2147483647) { $lextkey-=4294967296; } 126: 127: my $uextkey=hex($ukey); 128: if ($uextkey>2147483647) { $uextkey-=4294967296; } 129: 130: # -------------------------------------------------------- Store away log token 131: my $logtoken=Apache::lonnet::reply( 132: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 133: $lonhost); 134: 135: # ------------------- If we cannot talk to ourselves, we are in serious trouble 136: 137: if ($logtoken eq 'con_lost') { 138: my $spares=''; 139: foreach (keys %Apache::lonnet::hostname) { 140: if ($_ ne $lonhost) { 141: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 142: '/adm/login?domain='.$authdomain.'">'. 143: $Apache::lonnet::hostname{$_}.'</a>'; 144: if ($Apache::lonnet::spareid{$_}) { 145: $spares.=' (preferred)'; 146: } 147: } 148: } 149: $r->print(<<ENDTROUBLE); 150: <html> 151: <head><title>The LearningOnline Network with CAPA</title></head> 152: <body bgcolor="#FFFFFF"> 153: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 154: <h3>This LON-CAPA server is temporarily not available for login</h3> 155: <p>Please attempt to login to one of the following servers:</p>$spares 156: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 157: </body> 158: </html> 159: ENDTROUBLE 160: return OK; 161: } 162: 163: # ----------------------------------------------- Apparently we are in business 164: 165: my $domainlogo=&Apache::loncommon::domainlogo(); 166: $servadm=~s/\,/\<br \/\>/g; 167: $sysadm=~s/\,/\<br \/\>/g; 168: 169: # --------------------------------------------------- Print login screen header 170: $r->print(<<ENDHEADER); 171: <html> 172: <head> 173: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 174: <title>The LearningOnline Network with CAPA Login</title> 175: </head> 176: ENDHEADER 177: # ---------------------------------------------------- Serve out DES JavaScript 178: { 179: my $jsh=Apache::File->new($include."/londes.js"); 180: $r->print(<$jsh>); 181: } 182: 183: # ----------------------------------------------------------- Front page design 184: my $pgbg= 185: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 186: my $font= 187: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 188: my $link= 189: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 190: my $vlink= 191: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 192: my $alink=&Apache::loncommon::designparm('login.alink'); 193: my $mainbg= 194: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 195: my $sidebg= 196: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 197: my $logo=&Apache::loncommon::designparm('login.logo'); 198: my $img=&Apache::loncommon::designparm('login.img'); 199: 200: 201: # ---------------------------------------------------------- Serve rest of page 202: $r->print(<<ENDSCRIPT); 203: 204: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 205: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 206: 207: <script language="JavaScript"> 208: function send() 209: { 210: this.document.server.elements.uname.value 211: =this.document.client.elements.uname.value; 212: 213: this.document.server.elements.udom.value 214: =this.document.client.elements.udom.value; 215: 216: this.document.server.elements.imagesuppress.value 217: =this.document.client.elements.imagesuppress.checked; 218: 219: this.document.server.elements.embedsuppress.value 220: =this.document.client.elements.embedsuppress.checked; 221: 222: this.document.server.elements.appletsuppress.value 223: =this.document.client.elements.appletsuppress.checked; 224: 225: this.document.server.elements.fontenhance.value 226: =this.document.client.elements.fontenhance.checked; 227: 228: this.document.server.elements.blackwhite.value 229: =this.document.client.elements.blackwhite.checked; 230: 231: this.document.server.elements.remember.value 232: =this.document.client.elements.remember.checked; 233: 234: uextkey=this.document.client.elements.uextkey.value; 235: lextkey=this.document.client.elements.lextkey.value; 236: initkeys(); 237: 238: this.document.server.elements.upass.value 239: =crypted(this.document.client.elements.upass.value); 240: 241: this.document.server.submit(); 242: return false; 243: } 244: </script> 245: ENDSCRIPT 246: 247: if ($fullgraph) { 248: $r->print( 249: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 250: } 251: 252: $r->print(<<ENDSERVERFORM); 253: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 254: <input type="hidden" name="logtoken" value="$logtoken" /> 255: <input type="hidden" name="serverid" value="$lonhost" /> 256: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 257: <input type="hidden" name="uname" value="" /> 258: <input type="hidden" name="upass" value="" /> 259: <input type="hidden" name="udom" value="" /> 260: <input type="hidden" name="imagesuppress" value="" /> 261: <input type="hidden" name="appletsuppress" value="" /> 262: <input type="hidden" name="embedsuppress" value="" /> 263: <input type="hidden" name="fontenhance" value="" /> 264: <input type="hidden" name="blackwhite" value="" /> 265: <input type="hidden" name="remember" value="" /> 266: </form> 267: ENDSERVERFORM 268: if ($fullgraph) { $r->print(<<ENDTOP); 269:  270: <tr> 271: 272:  273: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 274: </tr> 275: 276:  277: <tr> 278: 279:  280: <td width=182 height=27 bgcolor="$sidebg"> </td> 281: 282:  283: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 284: 285:  286: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 287: 288:  289: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 290: </tr> 291: <tr> 292: 293:  294:  295: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 296: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 297: <br /> 298: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 299: </td> 300: 301:  302:  303: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 304: 305:  306:  307: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> 308: <center> 309: <img src="$logo" alt="" /> 310: </center> 311: </td> 312: 313:  314: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 315: </tr> 316: <tr> 317: 318:  319:  320: <td align="center" valign="middle" bgcolor="$sidebg"> 321: ENDTOP 322: } else { 323: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); 324: } 325: $r->print('<form name="client" onsubmit="return(send())">'); 326: unless ($fullgraph) { 327: $r->print(<<ENDACCESSOPTIONS); 328: <h3>Select Accessibility Options</h3> 329: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 330: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 331: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 332: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 333: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 334: <p>If you have accessibility needs that are not addressed by this interface, 335: please 336: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 337: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 338: ENDACCESSOPTIONS 339: } else { 340: $r->print(<<ENDNOOPT); 341: <input type="hidden" name="imagesuppress" value="" /> 342: <input type="hidden" name="embedsuppress" value="" /> 343: <input type="hidden" name="appletsuppress" value="" /> 344: <input type="hidden" name="fontenhance" value="" /> 345: <input type="hidden" name="blackwhite" value="" /> 346: <input type="hidden" name="remember" value="" /> 347: ENDNOOPT 348: } 349: $r->print(<<ENDLOGIN); 350: <input type="hidden" name="lextkey" value="$lextkey"> 351: <input type="hidden" name="uextkey" value="$uextkey"> 352: 353:  354: <table border=0 cellspacing=0 cellpadding=0> 355: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 356: <tr> 357: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 358: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 359: </tr> 360: <tr> 361: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 362: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 363: </tr> 364: <tr> 365: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 366: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 367: </tr> 368: <tr> 369: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 370: <td bgcolor="$mainbg" valign="bottom" align="center"> 371: <br /> 372: <input type="submit" value="Log In" /> 373: </td> 374: </tr> 375: </table> 376:  377: </form> 378: ENDLOGIN 379: if ($fullgraph) { 380: $r->print(<<ENDDOCUMENT); 381: </td> 382: 383:  384: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 385: 386:  387: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 388: </tr> 389: <tr> 390: 391:  392: <td bgcolor="$sidebg" valign="middle" align="left"> 393: <br /> 394: <table border=0 cellspacing=0 cellpadding=0> 395: <tr> 396: <td bgcolor="$sidebg" align="left" valign="top"> 397: <small><b>   Domain: </b></small> 398: </td> 399: <td bgcolor="$sidebg" align="left" valign="top"> 400: <small><tt> $domain</tt></small> 401: </td> 402: </tr> 403: <tr> 404: <td bgcolor="$sidebg" align="left" valign="top"> 405: <small><b>   Server: </b></small> 406: </td> 407: <td bgcolor="$sidebg" align="left" valign="top"> 408: <small><tt> $lonhost ($role)</tt></small> 409: </td> 410: </tr> 411: <tr> 412: <td bgcolor="$sidebg" align="left" valign="top"> 413: <small><b>   Load: </b></small> 414: </td> 415: <td bgcolor="$sidebg" align="left" valign="top"> 416: <small><tt> $loadpercent percent</tt></small> 417: </td> 418: </tr> 419: <tr> 420: <td bgcolor="$sidebg" align="left" valign="top"> 421: <small><b>   User Load: </b></small> 422: </td> 423: <td bgcolor="$sidebg" align="left" valign="top"> 424: <small><tt> $userloadpercent percent</tt></small> 425: </td> 426: </tr> 427: </table> 428: <br /> 429: <small> 430: <b>   System Administration:</b><br /> 431: <tt>      $sysadm</tt><br /> 432: <b>   Server Administration:</b><br /> 433: <tt>      $servadm<br /> </tt> 434: </small> 435: </td> 436: 437:  438: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 439: 440:  441: <td width="100%" valign="bottom" bgcolor="$mainbg"> 442: $domainlogo 443: </td> 444: 445:  446: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 447: </tr> 448: <tr> 449: 450:  451: <td bgcolor="$sidebg"> </td> 452: 453:  454: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 455: 456:  457: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 458: 459:  460: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 461: </tr> 462: </table> 463: 464: <script> 465: // the if prevents the script error if the browser can't handle this 466: if ( document.client.uname ) { document.client.uname.focus(); } 467: </script> 468: 469: ENDDOCUMENT 470: } 471: $r->print('</body></html>'); 472: return OK; 473: } 474: 475: 1; 476: __END__