loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.39: download - view: text, annotated - select for diffs
Wed Apr 2 14:57:32 2003 UTC (21 years, 2 months ago) by www
Branches: MAIN
CVS tags: HEAD

Direct notification email directly to login screen.

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.39 2003/04/02 14:57:32 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']); 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: 70: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':8080'. 71: $r->dir_config('lonIconsURL'); 72: my $domain = $r->dir_config('lonDefDomain'); 73: my $role = $r->dir_config('lonRole'); 74: my $loadlim = $r->dir_config('lonLoadLim'); 75: my $servadm = $r->dir_config('lonAdmEMail'); 76: my $sysadm = $r->dir_config('lonSysEMail'); 77: my $lonhost = $r->dir_config('lonHostID'); 78: my $tabdir = $r->dir_config('lonTabDir'); 79: my $include = $r->dir_config('lonIncludes'); 80: my $expire = $r->dir_config('lonExpire'); 81: 82: # --------------------------------------------- Default values for login fields 83: 84: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 85: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 86: 87: # ---------------------------------------------------------- Determine own load 88: my $loadavg; 89: { 90: my $loadfile=Apache::File->new('/proc/loadavg'); 91: $loadavg=<$loadfile>; 92: } 93: $loadavg =~ s/\s.*//g; 94: my $loadpercent=100*$loadavg/$loadlim; 95: 96: # ------------------------------------------------------- Do the load balancing 97: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 98: my $firsturl= 99: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 100: # ---------------------------------------- Are we access server and overloaded? 101: if (($role eq 'access') && ($loadpercent>100.0)) { 102: $otherserver=Apache::lonnet::spareserver($loadpercent); 103: } 104: 105: # -------------------------------------------------------- Set login parameters 106: 107: my @hexstr=('0','1','2','3','4','5','6','7', 108: '8','9','a','b','c','d','e','f'); 109: my $lkey=''; 110: for (0..7) { 111: $lkey.=$hexstr[rand(15)]; 112: } 113: 114: my $ukey=''; 115: for (0..7) { 116: $ukey.=$hexstr[rand(15)]; 117: } 118: 119: my $lextkey=hex($lkey); 120: if ($lextkey>2147483647) { $lextkey-=4294967296; } 121: 122: my $uextkey=hex($ukey); 123: if ($uextkey>2147483647) { $uextkey-=4294967296; } 124: 125: # -------------------------------------------------------- Store away log token 126: my $logtoken=Apache::lonnet::reply( 127: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 128: $lonhost); 129: 130: # ------------------- If we cannot talk to ourselves, we are in serious trouble 131: 132: if ($logtoken eq 'con_lost') { 133: my $spares=''; 134: foreach (keys %Apache::lonnet::hostname) { 135: if ($_ ne $lonhost) { 136: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 137: '/adm/login?domain='.$authdomain.'">'. 138: $Apache::lonnet::hostname{$_}.'</a>'; 139: if ($Apache::lonnet::spareid{$_}) { 140: $spares.=' (preferred)'; 141: } 142: } 143: } 144: $r->print(<<ENDTROUBLE); 145: <html> 146: <head><title>The LearningOnline Network with CAPA</title></head> 147: <body bgcolor="#FFFFFF"> 148: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 149: <h3>This LON-CAPA server is temporarily not available for login</h3> 150: <p>Please attempt to login to one of the following servers:</p>$spares 151: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 152: </body> 153: </html> 154: ENDTROUBLE 155: return OK; 156: } 157: 158: # ----------------------------------------------- Apparently we are in business 159: 160: my $domainlogo=&Apache::loncommon::domainlogo(); 161: $servadm=~s/\,/\<br \/\>/g; 162: $sysadm=~s/\,/\<br \/\>/g; 163: 164: # --------------------------------------------------- Print login screen header 165: $r->print(<<ENDHEADER); 166: <html> 167: <head> 168: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 169: <title>The LearningOnline Network with CAPA Login</title> 170: </head> 171: ENDHEADER 172: # ---------------------------------------------------- Serve out DES JavaScript 173: { 174: my $jsh=Apache::File->new($include."/londes.js"); 175: $r->print(<$jsh>); 176: } 177: 178: # ----------------------------------------------------------- Front page design 179: my $pgbg= 180: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 181: my $font= 182: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 183: my $link= 184: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 185: my $vlink= 186: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 187: my $alink=&Apache::loncommon::designparm('login.alink'); 188: my $mainbg= 189: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 190: my $sidebg= 191: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 192: my $logo=&Apache::loncommon::designparm('login.logo'); 193: my $img=&Apache::loncommon::designparm('login.img'); 194: 195: 196: # ---------------------------------------------------------- Serve rest of page 197: $r->print(<<ENDSCRIPT); 198: 199: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 200: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 201: 202: <script language="JavaScript"> 203: function send() 204: { 205: this.document.server.elements.uname.value 206: =this.document.client.elements.uname.value; 207: 208: this.document.server.elements.udom.value 209: =this.document.client.elements.udom.value; 210: 211: this.document.server.elements.imagesuppress.value 212: =this.document.client.elements.imagesuppress.checked; 213: 214: this.document.server.elements.embedsuppress.value 215: =this.document.client.elements.embedsuppress.checked; 216: 217: this.document.server.elements.appletsuppress.value 218: =this.document.client.elements.appletsuppress.checked; 219: 220: this.document.server.elements.fontenhance.value 221: =this.document.client.elements.fontenhance.checked; 222: 223: this.document.server.elements.blackwhite.value 224: =this.document.client.elements.blackwhite.checked; 225: 226: this.document.server.elements.remember.value 227: =this.document.client.elements.remember.checked; 228: 229: uextkey=this.document.client.elements.uextkey.value; 230: lextkey=this.document.client.elements.lextkey.value; 231: initkeys(); 232: 233: this.document.server.elements.upass.value 234: =crypted(this.document.client.elements.upass.value); 235: 236: this.document.server.submit(); 237: return false; 238: } 239: </script> 240: ENDSCRIPT 241: 242: if ($fullgraph) { 243: $r->print( 244: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 245: } 246: 247: $r->print(<<ENDSERVERFORM); 248: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 249: <input type="hidden" name="logtoken" value="$logtoken" /> 250: <input type="hidden" name="serverid" value="$lonhost" /> 251: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 252: <input type="hidden" name="uname" value="" /> 253: <input type="hidden" name="upass" value="" /> 254: <input type="hidden" name="udom" value="" /> 255: <input type="hidden" name="imagesuppress" value="" /> 256: <input type="hidden" name="appletsuppress" value="" /> 257: <input type="hidden" name="embedsuppress" value="" /> 258: <input type="hidden" name="fontenhance" value="" /> 259: <input type="hidden" name="blackwhite" value="" /> 260: <input type="hidden" name="remember" value="" /> 261: </form> 262: ENDSERVERFORM 263: if ($fullgraph) { $r->print(<<ENDTOP); 264:  265: <tr> 266: 267:  268: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 269: </tr> 270: 271:  272: <tr> 273: 274:  275: <td width=182 height=27 bgcolor="$sidebg"> </td> 276: 277:  278: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 279: 280:  281: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 282: 283:  284: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 285: </tr> 286: <tr> 287: 288:  289:  290: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 291: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 292: <br /> 293: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 294: </td> 295: 296:  297:  298: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 299: 300:  301:  302: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> 303: <center> 304: <img src="$logo" alt="" /> 305: </center> 306: </td> 307: 308:  309: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 310: </tr> 311: <tr> 312: 313:  314:  315: <td align="center" valign="middle" bgcolor="$sidebg"> 316: ENDTOP 317: } else { 318: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); 319: } 320: $r->print('<form name="client" onsubmit="return(send())">'); 321: unless ($fullgraph) { 322: $r->print(<<ENDACCESSOPTIONS); 323: <h3>Select Accessibility Options</h3> 324: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 325: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 326: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 327: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 328: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 329: <p>If you have accessibility needs that are not addressed by this interface, 330: please 331: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 332: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 333: ENDACCESSOPTIONS 334: } else { 335: $r->print(<<ENDNOOPT); 336: <input type="hidden" name="imagesuppress" value="" /> 337: <input type="hidden" name="embedsuppress" value="" /> 338: <input type="hidden" name="appletsuppress" value="" /> 339: <input type="hidden" name="fontenhance" value="" /> 340: <input type="hidden" name="blackwhite" value="" /> 341: <input type="hidden" name="remember" value="" /> 342: ENDNOOPT 343: } 344: $r->print(<<ENDLOGIN); 345: <input type="hidden" name="lextkey" value="$lextkey"> 346: <input type="hidden" name="uextkey" value="$uextkey"> 347: 348:  349: <table border=0 cellspacing=0 cellpadding=0> 350: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 351: <tr> 352: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 353: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 354: </tr> 355: <tr> 356: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 357: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 358: </tr> 359: <tr> 360: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 361: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 362: </tr> 363: <tr> 364: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 365: <td bgcolor="$mainbg" valign="bottom" align="center"> 366: <br /> 367: <input type="submit" value="Log In" /> 368: </td> 369: </tr> 370: </table> 371:  372: </form> 373: ENDLOGIN 374: if ($fullgraph) { 375: $r->print(<<ENDDOCUMENT); 376: </td> 377: 378:  379: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 380: 381:  382: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 383: </tr> 384: <tr> 385: 386:  387: <td bgcolor="$sidebg" valign="middle" align="left"> 388: <br /> 389: <table border=0 cellspacing=0 cellpadding=0> 390: <tr> 391: <td bgcolor="$sidebg" align="left" valign="top"> 392: <small><b>   Domain: </b></small> 393: </td> 394: <td bgcolor="$sidebg" align="left" valign="top"> 395: <small><tt> $domain</tt></small> 396: </td> 397: </tr> 398: <tr> 399: <td bgcolor="$sidebg" align="left" valign="top"> 400: <small><b>   Server: </b></small> 401: </td> 402: <td bgcolor="$sidebg" align="left" valign="top"> 403: <small><tt> $lonhost ($role)</tt></small> 404: </td> 405: </tr> 406: <tr> 407: <td bgcolor="$sidebg" align="left" valign="top"> 408: <small><b>   Load: </b></small> 409: </td> 410: <td bgcolor="$sidebg" align="left" valign="top"> 411: <small><tt> $loadpercent percent</tt></small> 412: </td> 413: </tr> 414: </table> 415: <br /> 416: <small> 417: <b>   System Administration:</b><br /> 418: <tt>      $sysadm</tt><br /> 419: <b>   Server Administration:</b><br /> 420: <tt>      $servadm<br /> </tt> 421: </small> 422: </td> 423: 424:  425: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 426: 427:  428: <td width="100%" valign="bottom" bgcolor="$mainbg"> 429: $domainlogo 430: </td> 431: 432:  433: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 434: </tr> 435: <tr> 436: 437:  438: <td bgcolor="$sidebg"> </td> 439: 440:  441: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 442: 443:  444: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 445: 446:  447: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 448: </tr> 449: </table> 450: 451: <script> 452: // the if prevents the script error if the browser can't handle this 453: if ( document.client.uname ) { document.client.uname.focus(); } 454: </script> 455: 456: ENDDOCUMENT 457: } 458: $r->print('</body></html>'); 459: return OK; 460: } 461: 462: 1; 463: __END__