loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.50: download - view: text, annotated - select for diffs
Tue Sep 16 18:15:43 2003 UTC (20 years, 8 months ago) by www
Branches: MAIN
CVS tags: HEAD

Initialize language handle

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.50 2003/09/16 18:15:43 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: use Apache::lonlocal; 45: 46: sub handler { 47: my $r = shift; 48: $r->content_type('text/html'); 49: &Apache::loncommon::no_cache($r); 50: $r->send_http_header; 51: return OK if $r->header_only; 52: 53: 54: # Are we re-routing? 55: if (-e '/home/httpd/html/lon-status/reroute.txt') { 56: &Apache::lonauth::reroute($r); 57: return OK; 58: } 59: 60: &Apache::loncommon::get_unprocessed_cgi 61: ($ENV{'QUERY_STRING'}.'&'.$ENV{'request.querystring'}, 62: ['interface','username','domain','firsturl','localpath','localres']); 63: 64: # -------------------------------------------------------------------- Language 65: 66: &Apache::lonlocal::get_language_handle(); 67: 68: # ----------------------------------------------------------- Process Interface 69: $ENV{'form.interface'}=~s/\W//g; 70: 71: my $textbrowsers=$r->dir_config('lonTextBrowsers'); 72: my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; 73: 74: foreach (split(/\:/,$textbrowsers)) { 75: if ($httpbrowser=~/$_/i) { 76: $ENV{'form.interface'}='textual'; 77: } 78: } 79: 80: my $fullgraph=($ENV{'form.interface'} ne 'textual'); 81: my $port_to_use=$r->dir_config('lonhttpdPort'); 82: if (!defined($port_to_use)) { 83: $port_to_use='8080'; 84: } 85: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use. 86: $r->dir_config('lonIconsURL'); 87: my $domain = $r->dir_config('lonDefDomain'); 88: if (($ENV{'form.domain'}) && 89: ($Apache::lonnet::domaindescription{$ENV{'form.domain'}})) { 90: $domain=$ENV{'form.domain'}; 91: } 92: my $role = $r->dir_config('lonRole'); 93: my $loadlim = $r->dir_config('lonLoadLim'); 94: my $servadm = $r->dir_config('lonAdmEMail'); 95: my $sysadm = $r->dir_config('lonSysEMail'); 96: my $lonhost = $r->dir_config('lonHostID'); 97: my $tabdir = $r->dir_config('lonTabDir'); 98: my $include = $r->dir_config('lonIncludes'); 99: my $expire = $r->dir_config('lonExpire'); 100: my $version = $r->dir_config('lonVersion'); 101: 102: # --------------------------------------------- Default values for login fields 103: 104: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 105: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 106: 107: # ---------------------------------------------------------- Determine own load 108: my $loadavg; 109: { 110: my $loadfile=Apache::File->new('/proc/loadavg'); 111: $loadavg=<$loadfile>; 112: } 113: $loadavg =~ s/\s.*//g; 114: my $loadpercent=100*$loadavg/$loadlim; 115: my $userloadpercent=&Apache::lonnet::userload(); 116: 117: # ------------------------------------------------------- Do the load balancing 118: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 119: my $firsturl= 120: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 121: # ---------------------------------------- Are we access server and overloaded? 122: if (($role eq 'access') && 123: (($userloadpercent>100.0)||($loadpercent>100.0))) { 124: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 125: if ($unloaded) { $otherserver=$unloaded; } 126: } 127: 128: # ----------------------------------------------------------- Get announcements 129: my $announcements=&Apache::lonnet::getannounce(); 130: # -------------------------------------------------------- Set login parameters 131: 132: my @hexstr=('0','1','2','3','4','5','6','7', 133: '8','9','a','b','c','d','e','f'); 134: my $lkey=''; 135: for (0..7) { 136: $lkey.=$hexstr[rand(15)]; 137: } 138: 139: my $ukey=''; 140: for (0..7) { 141: $ukey.=$hexstr[rand(15)]; 142: } 143: 144: my $lextkey=hex($lkey); 145: if ($lextkey>2147483647) { $lextkey-=4294967296; } 146: 147: my $uextkey=hex($ukey); 148: if ($uextkey>2147483647) { $uextkey-=4294967296; } 149: 150: # -------------------------------------------------------- Store away log token 151: my $logtoken=Apache::lonnet::reply( 152: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 153: $lonhost); 154: 155: # ------------------- If we cannot talk to ourselves, we are in serious trouble 156: 157: if ($logtoken eq 'con_lost') { 158: my $spares=''; 159: foreach (keys %Apache::lonnet::hostname) { 160: if ($_ ne $lonhost) { 161: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 162: '/adm/login?domain='.$authdomain.'">'. 163: $Apache::lonnet::hostname{$_}.'</a>'; 164: if ($Apache::lonnet::spareid{$_}) { 165: $spares.=' (preferred)'; 166: } 167: } 168: } 169: $r->print(<<ENDTROUBLE); 170: <html> 171: <head><title>The LearningOnline Network with CAPA</title></head> 172: <body bgcolor="#FFFFFF"> 173: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 174: <h3>This LON-CAPA server is temporarily not available for login</h3> 175: <p>Please attempt to login to one of the following servers:</p>$spares 176: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 177: </body> 178: </html> 179: ENDTROUBLE 180: return OK; 181: } 182: 183: # ----------------------------------------------- Apparently we are in business 184: 185: my $domainlogo=&Apache::loncommon::domainlogo($domain); 186: $servadm=~s/\,/\<br \/\>/g; 187: $sysadm=~s/\,/\<br \/\>/g; 188: 189: # --------------------------------------------------- Print login screen header 190: $r->print(<<ENDHEADER); 191: <html> 192: <head> 193: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 194: <title>The LearningOnline Network with CAPA Login</title> 195: </head> 196: ENDHEADER 197: # ---------------------------------------------------- Serve out DES JavaScript 198: { 199: my $jsh=Apache::File->new($include."/londes.js"); 200: $r->print(<$jsh>); 201: } 202: 203: # ----------------------------------------------------------- Front page design 204: my $pgbg= 205: ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF'); 206: my $font= 207: ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000'); 208: my $link= 209: ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF'); 210: my $vlink= 211: ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF'); 212: my $alink=&Apache::loncommon::designparm('login.alink',$domain); 213: my $mainbg= 214: ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF'); 215: my $sidebg= 216: ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF'); 217: my $logo=&Apache::loncommon::designparm('login.logo',$domain); 218: my $img=&Apache::loncommon::designparm('login.img',$domain); 219: 220: 221: # ---------------------------------------------------------- Serve rest of page 222: $r->print(<<ENDSCRIPT); 223: 224: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 225: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 226: 227: <script language="JavaScript"> 228: function send() 229: { 230: this.document.server.elements.uname.value 231: =this.document.client.elements.uname.value; 232: 233: this.document.server.elements.udom.value 234: =this.document.client.elements.udom.value; 235: 236: this.document.server.elements.imagesuppress.value 237: =this.document.client.elements.imagesuppress.checked; 238: 239: this.document.server.elements.embedsuppress.value 240: =this.document.client.elements.embedsuppress.checked; 241: 242: this.document.server.elements.appletsuppress.value 243: =this.document.client.elements.appletsuppress.checked; 244: 245: this.document.server.elements.fontenhance.value 246: =this.document.client.elements.fontenhance.checked; 247: 248: this.document.server.elements.blackwhite.value 249: =this.document.client.elements.blackwhite.checked; 250: 251: this.document.server.elements.remember.value 252: =this.document.client.elements.remember.checked; 253: 254: uextkey=this.document.client.elements.uextkey.value; 255: lextkey=this.document.client.elements.lextkey.value; 256: initkeys(); 257: 258: this.document.server.elements.upass.value 259: =crypted(this.document.client.elements.upass.value); 260: 261: this.document.server.submit(); 262: return false; 263: } 264: </script> 265: ENDSCRIPT 266: 267: if ($fullgraph) { 268: $r->print( 269: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 270: } 271: 272: $r->print(<<ENDSERVERFORM); 273: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 274: <input type="hidden" name="logtoken" value="$logtoken" /> 275: <input type="hidden" name="serverid" value="$lonhost" /> 276: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 277: <input type="hidden" name="uname" value="" /> 278: <input type="hidden" name="upass" value="" /> 279: <input type="hidden" name="udom" value="" /> 280: <input type="hidden" name="imagesuppress" value="" /> 281: <input type="hidden" name="appletsuppress" value="" /> 282: <input type="hidden" name="embedsuppress" value="" /> 283: <input type="hidden" name="fontenhance" value="" /> 284: <input type="hidden" name="blackwhite" value="" /> 285: <input type="hidden" name="remember" value="" /> 286: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" /> 287: <input type="hidden" name="localres" value="$ENV{'form.localres'}" /> 288: </form> 289: ENDSERVERFORM 290: if ($fullgraph) { $r->print(<<ENDTOP); 291:  292: <tr> 293: 294:  295: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 296: </tr> 297: 298:  299: <tr> 300: 301:  302: <td width=182 height=27 bgcolor="$sidebg"> </td> 303: 304:  305: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 306: 307:  308: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 309: 310:  311: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 312: </tr> 313: <tr> 314: 315:  316:  317: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 318: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 319: <br /> 320: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 321: </td> 322: 323:  324:  325: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 326: 327:  328:  329: <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg"> 330: <center> 331: <img src="$logo" alt="" /> 332: </center> 333: </td> 334: 335:  336: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 337: </tr> 338: <tr> 339: 340:  341:  342: <td align="center" valign="middle" bgcolor="$sidebg"> 343: ENDTOP 344: } else { 345: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements); 346: } 347: $r->print('<form name="client" onsubmit="return(send())">'); 348: unless ($fullgraph) { 349: $r->print(<<ENDACCESSOPTIONS); 350: <h3>Select Accessibility Options</h3> 351: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 352: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 353: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 354: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 355: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 356: <p>If you have accessibility needs that are not addressed by this interface, 357: please 358: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 359: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 360: ENDACCESSOPTIONS 361: } else { 362: $r->print(<<ENDNOOPT); 363: <input type="hidden" name="imagesuppress" value="" /> 364: <input type="hidden" name="embedsuppress" value="" /> 365: <input type="hidden" name="appletsuppress" value="" /> 366: <input type="hidden" name="fontenhance" value="" /> 367: <input type="hidden" name="blackwhite" value="" /> 368: <input type="hidden" name="remember" value="" /> 369: ENDNOOPT 370: } 371: $r->print(<<ENDLOGIN); 372: <input type="hidden" name="lextkey" value="$lextkey"> 373: <input type="hidden" name="uextkey" value="$uextkey"> 374: 375:  376: <table border=0 cellspacing=0 cellpadding=0> 377: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 378: <tr> 379: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 380: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 381: </tr> 382: <tr> 383: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 384: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 385: </tr> 386: <tr> 387: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 388: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 389: </tr> 390: <tr> 391: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 392: <td bgcolor="$mainbg" valign="bottom" align="center"> 393: <br /> 394: <input type="submit" value="Log In" /> 395: </td> 396: </tr> 397: </table> 398:  399: </form> 400: ENDLOGIN 401: if ($fullgraph) { 402: $r->print(<<ENDDOCUMENT); 403: </td> 404: 405:  406: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 407: 408:  409: <td bgcolor="$mainbg">$announcements</td> 410: 411:  412: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 413: </tr> 414: <tr> 415: 416:  417: <td bgcolor="$sidebg" valign="middle" align="left"> 418: <br /> 419: <table border=0 cellspacing=0 cellpadding=0> 420: <tr> 421: <td bgcolor="$sidebg" align="left" valign="top"> 422: <small><b>   Domain: </b></small> 423: </td> 424: <td bgcolor="$sidebg" align="left" valign="top"> 425: <small><tt> $domain</tt></small> 426: </td> 427: </tr> 428: <tr> 429: <td bgcolor="$sidebg" align="left" valign="top"> 430: <small><b>   Server: </b></small> 431: </td> 432: <td bgcolor="$sidebg" align="left" valign="top"> 433: <small><tt> $lonhost ($role)</tt></small> 434: </td> 435: </tr> 436: <tr> 437: <td bgcolor="$sidebg" align="left" valign="top"> 438: <small><b>   Load: </b></small> 439: </td> 440: <td bgcolor="$sidebg" align="left" valign="top"> 441: <small><tt> $loadpercent percent</tt></small> 442: </td> 443: </tr> 444: <tr> 445: <td bgcolor="$sidebg" align="left" valign="top"> 446: <small><b>   User Load: </b></small> 447: </td> 448: <td bgcolor="$sidebg" align="left" valign="top"> 449: <small><tt> $userloadpercent percent</tt></small> 450: </td> 451: </tr> 452: </table> 453: <br /> 454: <small> 455: <b>   System Administration:</b><br /> 456: <tt>      $sysadm</tt><br /> 457: <b>   Server Administration:</b><br /> 458: <tt>      $servadm</tt><br /> <br /> 459:    $version 460: </small> 461: </td> 462: 463:  464: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 465: 466:  467: <td width="100%" valign="bottom" bgcolor="$mainbg"> 468: $domainlogo 469: </td> 470: 471:  472: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 473: </tr> 474: <tr> 475: 476:  477: <td bgcolor="$sidebg"> </td> 478: 479:  480: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 481: 482:  483: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 484: 485:  486: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 487: </tr> 488: </table> 489: 490: <script> 491: // the if prevents the script error if the browser can't handle this 492: if ( document.client.uname ) { document.client.uname.focus(); } 493: </script> 494: 495: ENDDOCUMENT 496: } 497: $r->print('</body></html>'); 498: return OK; 499: } 500: 501: 1; 502: __END__