loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.49: download - view: text, annotated - select for diffs
Thu Sep 11 20:54:11 2003 UTC (20 years, 8 months ago) by www
Branches: MAIN
CVS tags: HEAD

Also have login handlers detect re-reouting.

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.49 2003/09/11 20:54:11 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: use Apache::lonauth(); 44: 45: sub handler { 46: my $r = shift; 47: $r->content_type('text/html'); 48: &Apache::loncommon::no_cache($r); 49: $r->send_http_header; 50: return OK if $r->header_only; 51: 52: 53: # Are we re-routing? 54: if (-e '/home/httpd/html/lon-status/reroute.txt') { 55: &Apache::lonauth::reroute($r); 56: return OK; 57: } 58: 59: &Apache::loncommon::get_unprocessed_cgi 60: ($ENV{'QUERY_STRING'}.'&'.$ENV{'request.querystring'}, 61: ['interface','username','domain','firsturl','localpath','localres']); 62: 63: # ----------------------------------------------------------- Process Interface 64: $ENV{'form.interface'}=~s/\W//g; 65: 66: my $textbrowsers=$r->dir_config('lonTextBrowsers'); 67: my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; 68: 69: foreach (split(/\:/,$textbrowsers)) { 70: if ($httpbrowser=~/$_/i) { 71: $ENV{'form.interface'}='textual'; 72: } 73: } 74: 75: my $fullgraph=($ENV{'form.interface'} ne 'textual'); 76: my $port_to_use=$r->dir_config('lonhttpdPort'); 77: if (!defined($port_to_use)) { 78: $port_to_use='8080'; 79: } 80: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use. 81: $r->dir_config('lonIconsURL'); 82: my $domain = $r->dir_config('lonDefDomain'); 83: if (($ENV{'form.domain'}) && 84: ($Apache::lonnet::domaindescription{$ENV{'form.domain'}})) { 85: $domain=$ENV{'form.domain'}; 86: } 87: my $role = $r->dir_config('lonRole'); 88: my $loadlim = $r->dir_config('lonLoadLim'); 89: my $servadm = $r->dir_config('lonAdmEMail'); 90: my $sysadm = $r->dir_config('lonSysEMail'); 91: my $lonhost = $r->dir_config('lonHostID'); 92: my $tabdir = $r->dir_config('lonTabDir'); 93: my $include = $r->dir_config('lonIncludes'); 94: my $expire = $r->dir_config('lonExpire'); 95: my $version = $r->dir_config('lonVersion'); 96: 97: # --------------------------------------------- Default values for login fields 98: 99: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 100: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 101: 102: # ---------------------------------------------------------- Determine own load 103: my $loadavg; 104: { 105: my $loadfile=Apache::File->new('/proc/loadavg'); 106: $loadavg=<$loadfile>; 107: } 108: $loadavg =~ s/\s.*//g; 109: my $loadpercent=100*$loadavg/$loadlim; 110: my $userloadpercent=&Apache::lonnet::userload(); 111: 112: # ------------------------------------------------------- Do the load balancing 113: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 114: my $firsturl= 115: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 116: # ---------------------------------------- Are we access server and overloaded? 117: if (($role eq 'access') && 118: (($userloadpercent>100.0)||($loadpercent>100.0))) { 119: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 120: if ($unloaded) { $otherserver=$unloaded; } 121: } 122: 123: # ----------------------------------------------------------- Get announcements 124: my $announcements=&Apache::lonnet::getannounce(); 125: # -------------------------------------------------------- Set login parameters 126: 127: my @hexstr=('0','1','2','3','4','5','6','7', 128: '8','9','a','b','c','d','e','f'); 129: my $lkey=''; 130: for (0..7) { 131: $lkey.=$hexstr[rand(15)]; 132: } 133: 134: my $ukey=''; 135: for (0..7) { 136: $ukey.=$hexstr[rand(15)]; 137: } 138: 139: my $lextkey=hex($lkey); 140: if ($lextkey>2147483647) { $lextkey-=4294967296; } 141: 142: my $uextkey=hex($ukey); 143: if ($uextkey>2147483647) { $uextkey-=4294967296; } 144: 145: # -------------------------------------------------------- Store away log token 146: my $logtoken=Apache::lonnet::reply( 147: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 148: $lonhost); 149: 150: # ------------------- If we cannot talk to ourselves, we are in serious trouble 151: 152: if ($logtoken eq 'con_lost') { 153: my $spares=''; 154: foreach (keys %Apache::lonnet::hostname) { 155: if ($_ ne $lonhost) { 156: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 157: '/adm/login?domain='.$authdomain.'">'. 158: $Apache::lonnet::hostname{$_}.'</a>'; 159: if ($Apache::lonnet::spareid{$_}) { 160: $spares.=' (preferred)'; 161: } 162: } 163: } 164: $r->print(<<ENDTROUBLE); 165: <html> 166: <head><title>The LearningOnline Network with CAPA</title></head> 167: <body bgcolor="#FFFFFF"> 168: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 169: <h3>This LON-CAPA server is temporarily not available for login</h3> 170: <p>Please attempt to login to one of the following servers:</p>$spares 171: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 172: </body> 173: </html> 174: ENDTROUBLE 175: return OK; 176: } 177: 178: # ----------------------------------------------- Apparently we are in business 179: 180: my $domainlogo=&Apache::loncommon::domainlogo($domain); 181: $servadm=~s/\,/\<br \/\>/g; 182: $sysadm=~s/\,/\<br \/\>/g; 183: 184: # --------------------------------------------------- Print login screen header 185: $r->print(<<ENDHEADER); 186: <html> 187: <head> 188: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 189: <title>The LearningOnline Network with CAPA Login</title> 190: </head> 191: ENDHEADER 192: # ---------------------------------------------------- Serve out DES JavaScript 193: { 194: my $jsh=Apache::File->new($include."/londes.js"); 195: $r->print(<$jsh>); 196: } 197: 198: # ----------------------------------------------------------- Front page design 199: my $pgbg= 200: ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF'); 201: my $font= 202: ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000'); 203: my $link= 204: ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF'); 205: my $vlink= 206: ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF'); 207: my $alink=&Apache::loncommon::designparm('login.alink',$domain); 208: my $mainbg= 209: ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF'); 210: my $sidebg= 211: ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF'); 212: my $logo=&Apache::loncommon::designparm('login.logo',$domain); 213: my $img=&Apache::loncommon::designparm('login.img',$domain); 214: 215: 216: # ---------------------------------------------------------- Serve rest of page 217: $r->print(<<ENDSCRIPT); 218: 219: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 220: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 221: 222: <script language="JavaScript"> 223: function send() 224: { 225: this.document.server.elements.uname.value 226: =this.document.client.elements.uname.value; 227: 228: this.document.server.elements.udom.value 229: =this.document.client.elements.udom.value; 230: 231: this.document.server.elements.imagesuppress.value 232: =this.document.client.elements.imagesuppress.checked; 233: 234: this.document.server.elements.embedsuppress.value 235: =this.document.client.elements.embedsuppress.checked; 236: 237: this.document.server.elements.appletsuppress.value 238: =this.document.client.elements.appletsuppress.checked; 239: 240: this.document.server.elements.fontenhance.value 241: =this.document.client.elements.fontenhance.checked; 242: 243: this.document.server.elements.blackwhite.value 244: =this.document.client.elements.blackwhite.checked; 245: 246: this.document.server.elements.remember.value 247: =this.document.client.elements.remember.checked; 248: 249: uextkey=this.document.client.elements.uextkey.value; 250: lextkey=this.document.client.elements.lextkey.value; 251: initkeys(); 252: 253: this.document.server.elements.upass.value 254: =crypted(this.document.client.elements.upass.value); 255: 256: this.document.server.submit(); 257: return false; 258: } 259: </script> 260: ENDSCRIPT 261: 262: if ($fullgraph) { 263: $r->print( 264: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 265: } 266: 267: $r->print(<<ENDSERVERFORM); 268: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 269: <input type="hidden" name="logtoken" value="$logtoken" /> 270: <input type="hidden" name="serverid" value="$lonhost" /> 271: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 272: <input type="hidden" name="uname" value="" /> 273: <input type="hidden" name="upass" value="" /> 274: <input type="hidden" name="udom" value="" /> 275: <input type="hidden" name="imagesuppress" value="" /> 276: <input type="hidden" name="appletsuppress" value="" /> 277: <input type="hidden" name="embedsuppress" value="" /> 278: <input type="hidden" name="fontenhance" value="" /> 279: <input type="hidden" name="blackwhite" value="" /> 280: <input type="hidden" name="remember" value="" /> 281: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" /> 282: <input type="hidden" name="localres" value="$ENV{'form.localres'}" /> 283: </form> 284: ENDSERVERFORM 285: if ($fullgraph) { $r->print(<<ENDTOP); 286:  287: <tr> 288: 289:  290: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 291: </tr> 292: 293:  294: <tr> 295: 296:  297: <td width=182 height=27 bgcolor="$sidebg"> </td> 298: 299:  300: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 301: 302:  303: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 304: 305:  306: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 307: </tr> 308: <tr> 309: 310:  311:  312: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 313: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 314: <br /> 315: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 316: </td> 317: 318:  319:  320: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 321: 322:  323:  324: <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg"> 325: <center> 326: <img src="$logo" alt="" /> 327: </center> 328: </td> 329: 330:  331: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 332: </tr> 333: <tr> 334: 335:  336:  337: <td align="center" valign="middle" bgcolor="$sidebg"> 338: ENDTOP 339: } else { 340: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements); 341: } 342: $r->print('<form name="client" onsubmit="return(send())">'); 343: unless ($fullgraph) { 344: $r->print(<<ENDACCESSOPTIONS); 345: <h3>Select Accessibility Options</h3> 346: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 347: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 348: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 349: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 350: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 351: <p>If you have accessibility needs that are not addressed by this interface, 352: please 353: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 354: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 355: ENDACCESSOPTIONS 356: } else { 357: $r->print(<<ENDNOOPT); 358: <input type="hidden" name="imagesuppress" value="" /> 359: <input type="hidden" name="embedsuppress" value="" /> 360: <input type="hidden" name="appletsuppress" value="" /> 361: <input type="hidden" name="fontenhance" value="" /> 362: <input type="hidden" name="blackwhite" value="" /> 363: <input type="hidden" name="remember" value="" /> 364: ENDNOOPT 365: } 366: $r->print(<<ENDLOGIN); 367: <input type="hidden" name="lextkey" value="$lextkey"> 368: <input type="hidden" name="uextkey" value="$uextkey"> 369: 370:  371: <table border=0 cellspacing=0 cellpadding=0> 372: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 373: <tr> 374: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 375: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 376: </tr> 377: <tr> 378: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 379: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 380: </tr> 381: <tr> 382: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 383: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 384: </tr> 385: <tr> 386: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 387: <td bgcolor="$mainbg" valign="bottom" align="center"> 388: <br /> 389: <input type="submit" value="Log In" /> 390: </td> 391: </tr> 392: </table> 393:  394: </form> 395: ENDLOGIN 396: if ($fullgraph) { 397: $r->print(<<ENDDOCUMENT); 398: </td> 399: 400:  401: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 402: 403:  404: <td bgcolor="$mainbg">$announcements</td> 405: 406:  407: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 408: </tr> 409: <tr> 410: 411:  412: <td bgcolor="$sidebg" valign="middle" align="left"> 413: <br /> 414: <table border=0 cellspacing=0 cellpadding=0> 415: <tr> 416: <td bgcolor="$sidebg" align="left" valign="top"> 417: <small><b>   Domain: </b></small> 418: </td> 419: <td bgcolor="$sidebg" align="left" valign="top"> 420: <small><tt> $domain</tt></small> 421: </td> 422: </tr> 423: <tr> 424: <td bgcolor="$sidebg" align="left" valign="top"> 425: <small><b>   Server: </b></small> 426: </td> 427: <td bgcolor="$sidebg" align="left" valign="top"> 428: <small><tt> $lonhost ($role)</tt></small> 429: </td> 430: </tr> 431: <tr> 432: <td bgcolor="$sidebg" align="left" valign="top"> 433: <small><b>   Load: </b></small> 434: </td> 435: <td bgcolor="$sidebg" align="left" valign="top"> 436: <small><tt> $loadpercent percent</tt></small> 437: </td> 438: </tr> 439: <tr> 440: <td bgcolor="$sidebg" align="left" valign="top"> 441: <small><b>   User Load: </b></small> 442: </td> 443: <td bgcolor="$sidebg" align="left" valign="top"> 444: <small><tt> $userloadpercent percent</tt></small> 445: </td> 446: </tr> 447: </table> 448: <br /> 449: <small> 450: <b>   System Administration:</b><br /> 451: <tt>      $sysadm</tt><br /> 452: <b>   Server Administration:</b><br /> 453: <tt>      $servadm</tt><br /> <br /> 454:    $version 455: </small> 456: </td> 457: 458:  459: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 460: 461:  462: <td width="100%" valign="bottom" bgcolor="$mainbg"> 463: $domainlogo 464: </td> 465: 466:  467: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 468: </tr> 469: <tr> 470: 471:  472: <td bgcolor="$sidebg"> </td> 473: 474:  475: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 476: 477:  478: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 479: 480:  481: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 482: </tr> 483: </table> 484: 485: <script> 486: // the if prevents the script error if the browser can't handle this 487: if ( document.client.uname ) { document.client.uname.focus(); } 488: </script> 489: 490: ENDDOCUMENT 491: } 492: $r->print('</body></html>'); 493: return OK; 494: } 495: 496: 1; 497: __END__