nsdl/nsdlloncapaorg/lonlogin.pm - view

File: [LON-CAPA] / nsdl / nsdlloncapaorg / lonlogin.pm
Revision 1.3: download - view: text, annotated - select for diffs
Fri Aug 29 14:10:40 2003 UTC (20 years, 8 months ago) by www
Branches: MAIN
CVS tags: HEAD

Backport of original 1.46->1.47 into NSDL version

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.3 2003/08/29 14:10:40 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: # ---------------------------------------- Are we access server and overloaded? 105: if (($role eq 'access') && 106: (($userloadpercent>100.0)||($loadpercent>100.0))) { 107: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 108: if ($unloaded) { $otherserver=$unloaded; } 109: } 110: 111: # -------------------------------------------------------- Set login parameters 112: 113: my @hexstr=('0','1','2','3','4','5','6','7', 114: '8','9','a','b','c','d','e','f'); 115: my $lkey=''; 116: for (0..7) { 117: $lkey.=$hexstr[rand(15)]; 118: } 119: 120: my $ukey=''; 121: for (0..7) { 122: $ukey.=$hexstr[rand(15)]; 123: } 124: 125: my $lextkey=hex($lkey); 126: if ($lextkey>2147483647) { $lextkey-=4294967296; } 127: 128: my $uextkey=hex($ukey); 129: if ($uextkey>2147483647) { $uextkey-=4294967296; } 130: 131: # -------------------------------------------------------- Store away log token 132: my $logtoken=Apache::lonnet::reply( 133: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 134: $lonhost); 135: 136: # ------------------- If we cannot talk to ourselves, we are in serious trouble 137: 138: if ($logtoken eq 'con_lost') { 139: my $spares=''; 140: foreach (keys %Apache::lonnet::hostname) { 141: if ($_ ne $lonhost) { 142: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 143: '/adm/login?domain='.$authdomain.'">'. 144: $Apache::lonnet::hostname{$_}.'</a>'; 145: if ($Apache::lonnet::spareid{$_}) { 146: $spares.=' (preferred)'; 147: } 148: } 149: } 150: $r->print(<<ENDTROUBLE); 151: <html> 152: <head><title>The LearningOnline Network with CAPA</title></head> 153: <body bgcolor="#FFFFFF"> 154: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 155: <h3>This LON-CAPA server is temporarily not available for login</h3> 156: <p>Please attempt to login to one of the following servers:</p>$spares 157: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 158: </body> 159: </html> 160: ENDTROUBLE 161: return OK; 162: } 163: 164: # ----------------------------------------------- Apparently we are in business 165: 166: my $domainlogo=&Apache::loncommon::domainlogo(); 167: $servadm=~s/\,/\<br \/\>/g; 168: $sysadm=~s/\,/\<br \/\>/g; 169: 170: # --------------------------------------------------- Print login screen header 171: $r->print(<<ENDHEADER); 172: <html> 173: <head> 174: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 175: <title>The LearningOnline Network with CAPA Login</title> 176: </head> 177: ENDHEADER 178: # ---------------------------------------------------- Serve out DES JavaScript 179: { 180: my $jsh=Apache::File->new($include."/londes.js"); 181: $r->print(<$jsh>); 182: } 183: 184: # ----------------------------------------------------------- Front page design 185: my $pgbg= 186: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 187: my $font= 188: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 189: my $link= 190: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 191: my $vlink= 192: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 193: my $alink=&Apache::loncommon::designparm('login.alink'); 194: my $mainbg= 195: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 196: my $sidebg= 197: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 198: my $logo=&Apache::loncommon::designparm('login.logo'); 199: my $img=&Apache::loncommon::designparm('login.img'); 200: 201: 202: # ---------------------------------------------------------- Serve rest of page 203: $r->print(<<ENDSCRIPT); 204: 205: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 206: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 207: 208: <script language="JavaScript"> 209: function send() 210: { 211: this.document.server.elements.uname.value 212: =this.document.client.elements.uname.value; 213: 214: this.document.server.elements.udom.value 215: =this.document.client.elements.udom.value; 216: 217: this.document.server.elements.imagesuppress.value 218: =this.document.client.elements.imagesuppress.checked; 219: 220: this.document.server.elements.embedsuppress.value 221: =this.document.client.elements.embedsuppress.checked; 222: 223: this.document.server.elements.appletsuppress.value 224: =this.document.client.elements.appletsuppress.checked; 225: 226: this.document.server.elements.fontenhance.value 227: =this.document.client.elements.fontenhance.checked; 228: 229: this.document.server.elements.blackwhite.value 230: =this.document.client.elements.blackwhite.checked; 231: 232: this.document.server.elements.remember.value 233: =this.document.client.elements.remember.checked; 234: 235: uextkey=this.document.client.elements.uextkey.value; 236: lextkey=this.document.client.elements.lextkey.value; 237: initkeys(); 238: 239: this.document.server.elements.upass.value 240: =crypted(this.document.client.elements.upass.value); 241: 242: this.document.server.submit(); 243: return false; 244: } 245: </script> 246: ENDSCRIPT 247: 248: if ($fullgraph) { 249: $r->print( 250: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 251: } 252: 253: $r->print(<<ENDSERVERFORM); 254: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 255: <input type="hidden" name="logtoken" value="$logtoken" /> 256: <input type="hidden" name="serverid" value="$lonhost" /> 257: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 258: <input type="hidden" name="uname" value="" /> 259: <input type="hidden" name="upass" value="" /> 260: <input type="hidden" name="udom" value="" /> 261: <input type="hidden" name="imagesuppress" value="" /> 262: <input type="hidden" name="appletsuppress" value="" /> 263: <input type="hidden" name="embedsuppress" value="" /> 264: <input type="hidden" name="fontenhance" value="" /> 265: <input type="hidden" name="blackwhite" value="" /> 266: <input type="hidden" name="remember" value="" /> 267: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" /> 268: <input type="hidden" name="localres" value="$ENV{'form.localres'}" /> 269: </form> 270: ENDSERVERFORM 271: if ($fullgraph) { $r->print(<<ENDTOP); 272:  273: <tr> 274: 275:  276: <td width="100%" colspan=4 bgcolor="$sidebg"><h1><font color="$pgbg">Welcome to the LON-CAPA NSDL Gateway</font></h1><a href="/cgi-bin/signon.pl"><h3><font color="$pgbg">Sign up for a Guest Login</font></h3></a></td> 277: </tr> 278: 279:  280: <tr> 281: 282:  283: <td width=182 height=27 bgcolor="$sidebg"> </td> 284: 285:  286: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 287: 288:  289: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 290: 291:  292: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 293: </tr> 294: <tr> 295: 296:  297:  298: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 299: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 300: <br /> 301: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 302: </td> 303: 304:  305:  306: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 307: 308:  309:  310: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> 311: <center> 312: <img src="$logo" alt="" /> 313: </center> 314: </td> 315: 316:  317: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 318: </tr> 319: <tr> 320: 321:  322:  323: <td align="center" valign="middle" bgcolor="$sidebg"> 324: ENDTOP 325: } else { 326: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); 327: } 328: $r->print('<form name="client" onsubmit="return(send())">'); 329: unless ($fullgraph) { 330: $r->print(<<ENDACCESSOPTIONS); 331: <h3>Select Accessibility Options</h3> 332: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 333: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 334: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 335: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 336: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 337: <p>If you have accessibility needs that are not addressed by this interface, 338: please 339: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 340: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 341: ENDACCESSOPTIONS 342: } else { 343: $r->print(<<ENDNOOPT); 344: <input type="hidden" name="imagesuppress" value="" /> 345: <input type="hidden" name="embedsuppress" value="" /> 346: <input type="hidden" name="appletsuppress" value="" /> 347: <input type="hidden" name="fontenhance" value="" /> 348: <input type="hidden" name="blackwhite" value="" /> 349: <input type="hidden" name="remember" value="" /> 350: ENDNOOPT 351: } 352: $r->print(<<ENDLOGIN); 353: <input type="hidden" name="lextkey" value="$lextkey"> 354: <input type="hidden" name="uextkey" value="$uextkey"> 355: 356:  357: <table border=0 cellspacing=0 cellpadding=0> 358: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 359: <tr> 360: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 361: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 362: </tr> 363: <tr> 364: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 365: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 366: </tr> 367: <tr> 368: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 369: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 370: </tr> 371: <tr> 372: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 373: <td bgcolor="$mainbg" valign="bottom" align="center"> 374: <br /> 375: <input type="submit" value="Log In" /> 376: </td> 377: </tr> 378: </table> 379:  380: </form> 381: ENDLOGIN 382: if ($fullgraph) { 383: $r->print(<<ENDDOCUMENT); 384: </td> 385: 386:  387: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 388: 389:  390: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 391: </tr> 392: <tr> 393: 394:  395: <td bgcolor="$sidebg" valign="middle" align="left"> 396: <br /> 397: <table border=0 cellspacing=0 cellpadding=0> 398: <tr> 399: <td bgcolor="$sidebg" align="left" valign="top"> 400: <small><b>   Domain: </b></small> 401: </td> 402: <td bgcolor="$sidebg" align="left" valign="top"> 403: <small><tt> $domain</tt></small> 404: </td> 405: </tr> 406: <tr> 407: <td bgcolor="$sidebg" align="left" valign="top"> 408: <small><b>   Server: </b></small> 409: </td> 410: <td bgcolor="$sidebg" align="left" valign="top"> 411: <small><tt> $lonhost ($role)</tt></small> 412: </td> 413: </tr> 414: <tr> 415: <td bgcolor="$sidebg" align="left" valign="top"> 416: <small><b>   Load: </b></small> 417: </td> 418: <td bgcolor="$sidebg" align="left" valign="top"> 419: <small><tt> $loadpercent percent</tt></small> 420: </td> 421: </tr> 422: <tr> 423: <td bgcolor="$sidebg" align="left" valign="top"> 424: <small><b>   User Load: </b></small> 425: </td> 426: <td bgcolor="$sidebg" align="left" valign="top"> 427: <small><tt> $userloadpercent percent</tt></small> 428: </td> 429: </tr> 430: </table> 431: <br /> 432: <small> 433: <b>   System Administration:</b><br /> 434: <tt>      $sysadm</tt><br /> 435: <b>   Server Administration:</b><br /> 436: <tt>      $servadm<br /> </tt> 437: </small> 438: </td> 439: 440:  441: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 442: 443:  444: <td width="100%" valign="bottom" bgcolor="$mainbg"> 445: $domainlogo 446: </td> 447: 448:  449: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 450: </tr> 451: <tr> 452: 453:  454: <td bgcolor="$sidebg"> </td> 455: 456:  457: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 458: 459:  460: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 461: 462:  463: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 464: </tr> 465: </table> 466: 467: <script> 468: // the if prevents the script error if the browser can't handle this 469: if ( document.client.uname ) { document.client.uname.focus(); } 470: </script> 471: 472: ENDDOCUMENT 473: } 474: $r->print('</body></html>'); 475: return OK; 476: } 477: 478: 1; 479: __END__