nsdl/nsdlloncapaorg/lonlogin.pm - view

File: [LON-CAPA] / nsdl / nsdlloncapaorg / lonlogin.pm
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1: # The LearningOnline Network 2: # Login Screen NSDL version 3: # 4: # $Id: lonlogin.pm,v 1.4 2003/08/29 14:50:13 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: 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: my $escfirsturl=&Apache::lonnet::escape($firsturl); 105: # ---------------------------------------- Are we access server and overloaded? 106: if (($role eq 'access') && 107: (($userloadpercent>100.0)||($loadpercent>100.0))) { 108: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 109: if ($unloaded) { $otherserver=$unloaded; } 110: } 111: 112: # -------------------------------------------------------- Set login parameters 113: 114: my @hexstr=('0','1','2','3','4','5','6','7', 115: '8','9','a','b','c','d','e','f'); 116: my $lkey=''; 117: for (0..7) { 118: $lkey.=$hexstr[rand(15)]; 119: } 120: 121: my $ukey=''; 122: for (0..7) { 123: $ukey.=$hexstr[rand(15)]; 124: } 125: 126: my $lextkey=hex($lkey); 127: if ($lextkey>2147483647) { $lextkey-=4294967296; } 128: 129: my $uextkey=hex($ukey); 130: if ($uextkey>2147483647) { $uextkey-=4294967296; } 131: 132: # -------------------------------------------------------- Store away log token 133: my $logtoken=Apache::lonnet::reply( 134: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 135: $lonhost); 136: 137: # ------------------- If we cannot talk to ourselves, we are in serious trouble 138: 139: if ($logtoken eq 'con_lost') { 140: my $spares=''; 141: foreach (keys %Apache::lonnet::hostname) { 142: if ($_ ne $lonhost) { 143: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 144: '/adm/login?domain='.$authdomain.'">'. 145: $Apache::lonnet::hostname{$_}.'</a>'; 146: if ($Apache::lonnet::spareid{$_}) { 147: $spares.=' (preferred)'; 148: } 149: } 150: } 151: $r->print(<<ENDTROUBLE); 152: <html> 153: <head><title>The LearningOnline Network with CAPA</title></head> 154: <body bgcolor="#FFFFFF"> 155: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 156: <h3>This LON-CAPA server is temporarily not available for login</h3> 157: <p>Please attempt to login to one of the following servers:</p>$spares 158: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 159: </body> 160: </html> 161: ENDTROUBLE 162: return OK; 163: } 164: 165: # ----------------------------------------------- Apparently we are in business 166: 167: my $domainlogo=&Apache::loncommon::domainlogo(); 168: $servadm=~s/\,/\<br \/\>/g; 169: $sysadm=~s/\,/\<br \/\>/g; 170: 171: # --------------------------------------------------- Print login screen header 172: $r->print(<<ENDHEADER); 173: <html> 174: <head> 175: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 176: <title>The LearningOnline Network with CAPA Login</title> 177: </head> 178: ENDHEADER 179: # ---------------------------------------------------- Serve out DES JavaScript 180: { 181: my $jsh=Apache::File->new($include."/londes.js"); 182: $r->print(<$jsh>); 183: } 184: 185: # ----------------------------------------------------------- Front page design 186: my $pgbg= 187: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 188: my $font= 189: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 190: my $link= 191: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 192: my $vlink= 193: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 194: my $alink=&Apache::loncommon::designparm('login.alink'); 195: my $mainbg= 196: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 197: my $sidebg= 198: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 199: my $logo=&Apache::loncommon::designparm('login.logo'); 200: my $img=&Apache::loncommon::designparm('login.img'); 201: 202: 203: # ---------------------------------------------------------- Serve rest of page 204: $r->print(<<ENDSCRIPT); 205: 206: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 207: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 208: 209: <script language="JavaScript"> 210: function send() 211: { 212: this.document.server.elements.uname.value 213: =this.document.client.elements.uname.value; 214: 215: this.document.server.elements.udom.value 216: =this.document.client.elements.udom.value; 217: 218: this.document.server.elements.imagesuppress.value 219: =this.document.client.elements.imagesuppress.checked; 220: 221: this.document.server.elements.embedsuppress.value 222: =this.document.client.elements.embedsuppress.checked; 223: 224: this.document.server.elements.appletsuppress.value 225: =this.document.client.elements.appletsuppress.checked; 226: 227: this.document.server.elements.fontenhance.value 228: =this.document.client.elements.fontenhance.checked; 229: 230: this.document.server.elements.blackwhite.value 231: =this.document.client.elements.blackwhite.checked; 232: 233: this.document.server.elements.remember.value 234: =this.document.client.elements.remember.checked; 235: 236: uextkey=this.document.client.elements.uextkey.value; 237: lextkey=this.document.client.elements.lextkey.value; 238: initkeys(); 239: 240: this.document.server.elements.upass.value 241: =crypted(this.document.client.elements.upass.value); 242: 243: this.document.server.submit(); 244: return false; 245: } 246: </script> 247: ENDSCRIPT 248: 249: if ($fullgraph) { 250: $r->print( 251: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 252: } 253: 254: $r->print(<<ENDSERVERFORM); 255: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 256: <input type="hidden" name="logtoken" value="$logtoken" /> 257: <input type="hidden" name="serverid" value="$lonhost" /> 258: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 259: <input type="hidden" name="uname" value="" /> 260: <input type="hidden" name="upass" value="" /> 261: <input type="hidden" name="udom" value="" /> 262: <input type="hidden" name="imagesuppress" value="" /> 263: <input type="hidden" name="appletsuppress" value="" /> 264: <input type="hidden" name="embedsuppress" value="" /> 265: <input type="hidden" name="fontenhance" value="" /> 266: <input type="hidden" name="blackwhite" value="" /> 267: <input type="hidden" name="remember" value="" /> 268: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" /> 269: <input type="hidden" name="localres" value="$ENV{'form.localres'}" /> 270: </form> 271: ENDSERVERFORM 272: if ($fullgraph) { $r->print(<<ENDTOP); 273:  274: <tr> 275: 276:  277: <td width="100%" colspan=4 bgcolor="$sidebg"><h1><font color="$pgbg">Welcome to the LON-CAPA NSDL Gateway</font></h1><a href="/cgi-bin/signon.pl?$escfirsturl"><h3><font color="$pgbg">Sign up for a Guest Login</font></h3></a></td> 278: </tr> 279: 280:  281: <tr> 282: 283:  284: <td width=182 height=27 bgcolor="$sidebg"> </td> 285: 286:  287: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 288: 289:  290: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 291: 292:  293: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 294: </tr> 295: <tr> 296: 297:  298:  299: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 300: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 301: <br /> 302: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 303: </td> 304: 305:  306:  307: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 308: 309:  310:  311: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> 312: <center> 313: <img src="$logo" alt="" /> 314: </center> 315: </td> 316: 317:  318: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 319: </tr> 320: <tr> 321: 322:  323:  324: <td align="center" valign="middle" bgcolor="$sidebg"> 325: ENDTOP 326: } else { 327: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); 328: } 329: $r->print('<form name="client" onsubmit="return(send())">'); 330: unless ($fullgraph) { 331: $r->print(<<ENDACCESSOPTIONS); 332: <h3>Select Accessibility Options</h3> 333: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 334: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 335: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 336: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 337: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 338: <p>If you have accessibility needs that are not addressed by this interface, 339: please 340: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 341: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 342: ENDACCESSOPTIONS 343: } else { 344: $r->print(<<ENDNOOPT); 345: <input type="hidden" name="imagesuppress" value="" /> 346: <input type="hidden" name="embedsuppress" value="" /> 347: <input type="hidden" name="appletsuppress" value="" /> 348: <input type="hidden" name="fontenhance" value="" /> 349: <input type="hidden" name="blackwhite" value="" /> 350: <input type="hidden" name="remember" value="" /> 351: ENDNOOPT 352: } 353: $r->print(<<ENDLOGIN); 354: <input type="hidden" name="lextkey" value="$lextkey"> 355: <input type="hidden" name="uextkey" value="$uextkey"> 356: 357:  358: <table border=0 cellspacing=0 cellpadding=0> 359: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 360: <tr> 361: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 362: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 363: </tr> 364: <tr> 365: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 366: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 367: </tr> 368: <tr> 369: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 370: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 371: </tr> 372: <tr> 373: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 374: <td bgcolor="$mainbg" valign="bottom" align="center"> 375: <br /> 376: <input type="submit" value="Log In" /> 377: </td> 378: </tr> 379: </table> 380:  381: </form> 382: ENDLOGIN 383: if ($fullgraph) { 384: $r->print(<<ENDDOCUMENT); 385: </td> 386: 387:  388: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 389: 390:  391: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 392: </tr> 393: <tr> 394: 395:  396: <td bgcolor="$sidebg" valign="middle" align="left"> 397: <br /> 398: <table border=0 cellspacing=0 cellpadding=0> 399: <tr> 400: <td bgcolor="$sidebg" align="left" valign="top"> 401: <small><b>   Domain: </b></small> 402: </td> 403: <td bgcolor="$sidebg" align="left" valign="top"> 404: <small><tt> $domain</tt></small> 405: </td> 406: </tr> 407: <tr> 408: <td bgcolor="$sidebg" align="left" valign="top"> 409: <small><b>   Server: </b></small> 410: </td> 411: <td bgcolor="$sidebg" align="left" valign="top"> 412: <small><tt> $lonhost ($role)</tt></small> 413: </td> 414: </tr> 415: <tr> 416: <td bgcolor="$sidebg" align="left" valign="top"> 417: <small><b>   Load: </b></small> 418: </td> 419: <td bgcolor="$sidebg" align="left" valign="top"> 420: <small><tt> $loadpercent percent</tt></small> 421: </td> 422: </tr> 423: <tr> 424: <td bgcolor="$sidebg" align="left" valign="top"> 425: <small><b>   User Load: </b></small> 426: </td> 427: <td bgcolor="$sidebg" align="left" valign="top"> 428: <small><tt> $userloadpercent percent</tt></small> 429: </td> 430: </tr> 431: </table> 432: <br /> 433: <small> 434: <b>   System Administration:</b><br /> 435: <tt>      $sysadm</tt><br /> 436: <b>   Server Administration:</b><br /> 437: <tt>      $servadm<br /> </tt> 438: </small> 439: </td> 440: 441:  442: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 443: 444:  445: <td width="100%" valign="bottom" bgcolor="$mainbg"> 446: $domainlogo 447: </td> 448: 449:  450: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 451: </tr> 452: <tr> 453: 454:  455: <td bgcolor="$sidebg"> </td> 456: 457:  458: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 459: 460:  461: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 462: 463:  464: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 465: </tr> 466: </table> 467: 468: <script> 469: // the if prevents the script error if the browser can't handle this 470: if ( document.client.uname ) { document.client.uname.focus(); } 471: </script> 472: 473: ENDDOCUMENT 474: } 475: $r->print('</body></html>'); 476: return OK; 477: } 478: 479: 1; 480: __END__