loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.37: download - view: text, annotated - select for diffs
Sun Mar 2 02:16:53 2003 UTC (21 years, 3 months ago) by www
Branches: MAIN
CVS tags: HEAD

Bug #1285
loncron cleans login tokens after a day.
* lonauth now give better error messages
* lonlogin refreshes the login page after a day
  (so the "expired" error should never happen anyway)
* loginproblems was adapted

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.37 2003/03/02 02:16:53 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'},['interface','username','domain','firsturl']); 54: 55: # ----------------------------------------------------------- Process Interface 56: $ENV{'form.interface'}=~s/\W//g; 57: 58: my $textbrowsers=$r->dir_config('lonTextBrowsers'); 59: my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; 60: 61: foreach (split(/\:/,$textbrowsers)) { 62: if ($httpbrowser=~/$_/i) { 63: $ENV{'form.interface'}='textual'; 64: } 65: } 66: 67: my $fullgraph=($ENV{'form.interface'} ne 'textual'); 68: 69: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':8080'. 70: $r->dir_config('lonIconsURL'); 71: my $domain = $r->dir_config('lonDefDomain'); 72: my $role = $r->dir_config('lonRole'); 73: my $loadlim = $r->dir_config('lonLoadLim'); 74: my $servadm = $r->dir_config('lonAdmEMail'); 75: my $sysadm = $r->dir_config('lonSysEMail'); 76: my $lonhost = $r->dir_config('lonHostID'); 77: my $tabdir = $r->dir_config('lonTabDir'); 78: my $include = $r->dir_config('lonIncludes'); 79: my $expire = $r->dir_config('lonExpire'); 80: 81: # --------------------------------------------- Default values for login fields 82: 83: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 84: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 85: 86: # ---------------------------------------------------------- Determine own load 87: my $loadavg; 88: { 89: my $loadfile=Apache::File->new('/proc/loadavg'); 90: $loadavg=<$loadfile>; 91: } 92: $loadavg =~ s/\s.*//g; 93: my $loadpercent=100*$loadavg/$loadlim; 94: 95: # ------------------------------------------------------- Do the load balancing 96: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 97: my $firsturl= 98: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 99: # ---------------------------------------- Are we access server and overloaded? 100: if (($role eq 'access') && ($loadpercent>100.0)) { 101: $otherserver=Apache::lonnet::spareserver($loadpercent); 102: } 103: 104: # -------------------------------------------------------- Set login parameters 105: 106: my @hexstr=('0','1','2','3','4','5','6','7', 107: '8','9','a','b','c','d','e','f'); 108: my $lkey=''; 109: for (0..7) { 110: $lkey.=$hexstr[rand(15)]; 111: } 112: 113: my $ukey=''; 114: for (0..7) { 115: $ukey.=$hexstr[rand(15)]; 116: } 117: 118: my $lextkey=hex($lkey); 119: if ($lextkey>2147483647) { $lextkey-=4294967296; } 120: 121: my $uextkey=hex($ukey); 122: if ($uextkey>2147483647) { $uextkey-=4294967296; } 123: 124: # -------------------------------------------------------- Store away log token 125: my $logtoken=Apache::lonnet::reply( 126: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 127: $lonhost); 128: 129: # ------------------- If we cannot talk to ourselves, we are in serious trouble 130: 131: if ($logtoken eq 'con_lost') { 132: my $spares=''; 133: foreach (keys %Apache::lonnet::hostname) { 134: if ($_ ne $lonhost) { 135: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 136: '/adm/login?domain='.$authdomain.'">'. 137: $Apache::lonnet::hostname{$_}.'</a>'; 138: if ($Apache::lonnet::spareid{$_}) { 139: $spares.=' (preferred)'; 140: } 141: } 142: } 143: $r->print(<<ENDTROUBLE); 144: <html> 145: <head><title>The LearningOnline Network with CAPA</title></head> 146: <body bgcolor="#FFFFFF"> 147: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 148: <h3>This LON-CAPA server is temporarily not available for login</h3> 149: <p>Please attempt to login to one of the following servers:</p>$spares 150: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 151: </body> 152: </html> 153: ENDTROUBLE 154: return OK; 155: } 156: 157: # ----------------------------------------------- Apparently we are in business 158: 159: my $domainlogo=&Apache::loncommon::domainlogo(); 160: # --------------------------------------------------- Print login screen header 161: $r->print(<<ENDHEADER); 162: <html> 163: <head> 164: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 165: <title>The LearningOnline Network with CAPA Login</title> 166: </head> 167: ENDHEADER 168: # ---------------------------------------------------- Serve out DES JavaScript 169: { 170: my $jsh=Apache::File->new($include."/londes.js"); 171: $r->print(<$jsh>); 172: } 173: 174: # ----------------------------------------------------------- Front page design 175: my $pgbg= 176: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 177: my $font= 178: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 179: my $link= 180: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 181: my $vlink= 182: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 183: my $alink=&Apache::loncommon::designparm('login.alink'); 184: my $mainbg= 185: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 186: my $sidebg= 187: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 188: my $logo=&Apache::loncommon::designparm('login.logo'); 189: my $img=&Apache::loncommon::designparm('login.img'); 190: 191: 192: # ---------------------------------------------------------- Serve rest of page 193: $r->print(<<ENDSCRIPT); 194: 195: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 196: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 197: 198: <script language="JavaScript"> 199: function send() 200: { 201: this.document.server.elements.uname.value 202: =this.document.client.elements.uname.value; 203: 204: this.document.server.elements.udom.value 205: =this.document.client.elements.udom.value; 206: 207: this.document.server.elements.imagesuppress.value 208: =this.document.client.elements.imagesuppress.checked; 209: 210: this.document.server.elements.embedsuppress.value 211: =this.document.client.elements.embedsuppress.checked; 212: 213: this.document.server.elements.appletsuppress.value 214: =this.document.client.elements.appletsuppress.checked; 215: 216: this.document.server.elements.fontenhance.value 217: =this.document.client.elements.fontenhance.checked; 218: 219: this.document.server.elements.blackwhite.value 220: =this.document.client.elements.blackwhite.checked; 221: 222: this.document.server.elements.remember.value 223: =this.document.client.elements.remember.checked; 224: 225: uextkey=this.document.client.elements.uextkey.value; 226: lextkey=this.document.client.elements.lextkey.value; 227: initkeys(); 228: 229: this.document.server.elements.upass.value 230: =crypted(this.document.client.elements.upass.value); 231: 232: this.document.server.submit(); 233: return false; 234: } 235: </script> 236: ENDSCRIPT 237: 238: if ($fullgraph) { 239: $r->print( 240: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 241: } 242: 243: $r->print(<<ENDSERVERFORM); 244: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 245: <input type="hidden" name="logtoken" value="$logtoken" /> 246: <input type="hidden" name="serverid" value="$lonhost" /> 247: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 248: <input type="hidden" name="uname" value="" /> 249: <input type="hidden" name="upass" value="" /> 250: <input type="hidden" name="udom" value="" /> 251: <input type="hidden" name="imagesuppress" value="" /> 252: <input type="hidden" name="appletsuppress" value="" /> 253: <input type="hidden" name="embedsuppress" value="" /> 254: <input type="hidden" name="fontenhance" value="" /> 255: <input type="hidden" name="blackwhite" value="" /> 256: <input type="hidden" name="remember" value="" /> 257: </form> 258: ENDSERVERFORM 259: if ($fullgraph) { $r->print(<<ENDTOP); 260:  261: <tr> 262: 263:  264: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 265: </tr> 266: 267:  268: <tr> 269: 270:  271: <td width=182 height=27 bgcolor="$sidebg"> </td> 272: 273:  274: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 275: 276:  277: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 278: 279:  280: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 281: </tr> 282: <tr> 283: 284:  285:  286: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 287: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 288: <br /> 289: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 290: </td> 291: 292:  293:  294: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 295: 296:  297:  298: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> 299: <center> 300: <img src="$logo" alt="" /> 301: </center> 302: </td> 303: 304:  305: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 306: </tr> 307: <tr> 308: 309:  310:  311: <td align="center" valign="middle" bgcolor="$sidebg"> 312: ENDTOP 313: } else { 314: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); 315: } 316: $r->print('<form name="client" onsubmit="return(send())">'); 317: unless ($fullgraph) { 318: $r->print(<<ENDACCESSOPTIONS); 319: <h3>Select Accessibility Options</h3> 320: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 321: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 322: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 323: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 324: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 325: <p>If you have accessibility needs that are not addressed by this interface, 326: please 327: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 328: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 329: ENDACCESSOPTIONS 330: } else { 331: $r->print(<<ENDNOOPT); 332: <input type="hidden" name="imagesuppress" value="" /> 333: <input type="hidden" name="embedsuppress" value="" /> 334: <input type="hidden" name="appletsuppress" value="" /> 335: <input type="hidden" name="fontenhance" value="" /> 336: <input type="hidden" name="blackwhite" value="" /> 337: <input type="hidden" name="remember" value="" /> 338: ENDNOOPT 339: } 340: $r->print(<<ENDLOGIN); 341: <input type="hidden" name="lextkey" value="$lextkey"> 342: <input type="hidden" name="uextkey" value="$uextkey"> 343: 344:  345: <table border=0 cellspacing=0 cellpadding=0> 346: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 347: <tr> 348: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 349: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 350: </tr> 351: <tr> 352: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 353: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 354: </tr> 355: <tr> 356: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 357: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 358: </tr> 359: <tr> 360: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 361: <td bgcolor="$mainbg" valign="bottom" align="center"> 362: <br /> 363: <input type="submit" value="Log In" /> 364: </td> 365: </tr> 366: </table> 367:  368: </form> 369: ENDLOGIN 370: if ($fullgraph) { 371: $r->print(<<ENDDOCUMENT); 372: </td> 373: 374:  375: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 376: 377:  378: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 379: </tr> 380: <tr> 381: 382:  383: <td bgcolor="$sidebg" valign="middle" align="left"> 384: <br /> 385: <table border=0 cellspacing=0 cellpadding=0> 386: <tr> 387: <td bgcolor="$sidebg" align="left" valign="top"> 388: <small><b>   Domain: </b></small> 389: </td> 390: <td bgcolor="$sidebg" align="left" valign="top"> 391: <small><tt> $domain</tt></small> 392: </td> 393: </tr> 394: <tr> 395: <td bgcolor="$sidebg" align="left" valign="top"> 396: <small><b>   Server: </b></small> 397: </td> 398: <td bgcolor="$sidebg" align="left" valign="top"> 399: <small><tt> $lonhost ($role)</tt></small> 400: </td> 401: </tr> 402: <tr> 403: <td bgcolor="$sidebg" align="left" valign="top"> 404: <small><b>   Load: </b></small> 405: </td> 406: <td bgcolor="$sidebg" align="left" valign="top"> 407: <small><tt> $loadpercent percent</tt></small> 408: </td> 409: </tr> 410: </table> 411: <br /> 412: <small> 413: <b>   System Administration:</b><br /> 414: <tt>      $sysadm</tt><br /> 415: <b>   Server Administration:</b><br /> 416: <tt>      $servadm<br /> </tt> 417: </small> 418: </td> 419: 420:  421: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 422: 423:  424: <td width="100%" valign="bottom" bgcolor="$mainbg"> 425: $domainlogo 426: </td> 427: 428:  429: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 430: </tr> 431: <tr> 432: 433:  434: <td bgcolor="$sidebg"> </td> 435: 436:  437: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 438: 439:  440: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 441: 442:  443: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 444: </tr> 445: </table> 446: 447: <script> 448: // the if prevents the script error if the browser can't handle this 449: if ( document.client.uname ) { document.client.uname.focus(); } 450: </script> 451: 452: ENDDOCUMENT 453: } 454: $r->print('</body></html>'); 455: return OK; 456: } 457: 458: 1; 459: __END__