loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.36: download - view: text, annotated - select for diffs
Thu Feb 20 01:35:27 2003 UTC (21 years, 3 months ago) by www
Branches: MAIN
CVS tags: HEAD

* Additional browser information
* Accessibility options get stored in environment for "remember"

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.36 2003/02/20 01:35:27 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: 80: # --------------------------------------------- Default values for login fields 81: 82: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:''); 83: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain); 84: 85: # ---------------------------------------------------------- Determine own load 86: my $loadavg; 87: { 88: my $loadfile=Apache::File->new('/proc/loadavg'); 89: $loadavg=<$loadfile>; 90: } 91: $loadavg =~ s/\s.*//g; 92: my $loadpercent=100*$loadavg/$loadlim; 93: 94: # ------------------------------------------------------- Do the load balancing 95: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 96: my $firsturl= 97: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'}); 98: # ---------------------------------------- Are we access server and overloaded? 99: if (($role eq 'access') && ($loadpercent>100.0)) { 100: $otherserver=Apache::lonnet::spareserver($loadpercent); 101: } 102: 103: # -------------------------------------------------------- Set login parameters 104: 105: my @hexstr=('0','1','2','3','4','5','6','7', 106: '8','9','a','b','c','d','e','f'); 107: my $lkey=''; 108: for (0..7) { 109: $lkey.=$hexstr[rand(15)]; 110: } 111: 112: my $ukey=''; 113: for (0..7) { 114: $ukey.=$hexstr[rand(15)]; 115: } 116: 117: my $lextkey=hex($lkey); 118: if ($lextkey>2147483647) { $lextkey-=4294967296; } 119: 120: my $uextkey=hex($ukey); 121: if ($uextkey>2147483647) { $uextkey-=4294967296; } 122: 123: # -------------------------------------------------------- Store away log token 124: my $logtoken=Apache::lonnet::reply( 125: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 126: $lonhost); 127: 128: # ------------------- If we cannot talk to ourselves, we are in serious trouble 129: 130: if ($logtoken eq 'con_lost') { 131: my $spares=''; 132: foreach (keys %Apache::lonnet::hostname) { 133: if ($_ ne $lonhost) { 134: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}. 135: '/adm/login?domain='.$authdomain.'">'. 136: $Apache::lonnet::hostname{$_}.'</a>'; 137: if ($Apache::lonnet::spareid{$_}) { 138: $spares.=' (preferred)'; 139: } 140: } 141: } 142: $r->print(<<ENDTROUBLE); 143: <html> 144: <head><title>The LearningOnline Network with CAPA</title></head> 145: <body bgcolor="#FFFFFF"> 146: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 147: <h3>This LON-CAPA server is temporarily not available for login</h3> 148: <p>Please attempt to login to one of the following servers:</p>$spares 149: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 150: </body> 151: </html> 152: ENDTROUBLE 153: return OK; 154: } 155: 156: # ----------------------------------------------- Apparently we are in business 157: 158: my $domainlogo=&Apache::loncommon::domainlogo(); 159: # --------------------------------------------------- Print login screen header 160: $r->print(<<ENDHEADER); 161: <html> 162: <head> 163: <title>The LearningOnline Network with CAPA Login</title> 164: </head> 165: ENDHEADER 166: # ---------------------------------------------------- Serve out DES JavaScript 167: { 168: my $jsh=Apache::File->new($include."/londes.js"); 169: $r->print(<$jsh>); 170: } 171: 172: # ----------------------------------------------------------- Front page design 173: my $pgbg= 174: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF'); 175: my $font= 176: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000'); 177: my $link= 178: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF'); 179: my $vlink= 180: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF'); 181: my $alink=&Apache::loncommon::designparm('login.alink'); 182: my $mainbg= 183: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF'); 184: my $sidebg= 185: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF'); 186: my $logo=&Apache::loncommon::designparm('login.logo'); 187: my $img=&Apache::loncommon::designparm('login.img'); 188: 189: 190: # ---------------------------------------------------------- Serve rest of page 191: $r->print(<<ENDSCRIPT); 192: 193: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 194: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 195: 196: <script language="JavaScript"> 197: function send() 198: { 199: this.document.server.elements.uname.value 200: =this.document.client.elements.uname.value; 201: 202: this.document.server.elements.udom.value 203: =this.document.client.elements.udom.value; 204: 205: this.document.server.elements.imagesuppress.value 206: =this.document.client.elements.imagesuppress.checked; 207: 208: this.document.server.elements.embedsuppress.value 209: =this.document.client.elements.embedsuppress.checked; 210: 211: this.document.server.elements.appletsuppress.value 212: =this.document.client.elements.appletsuppress.checked; 213: 214: this.document.server.elements.fontenhance.value 215: =this.document.client.elements.fontenhance.checked; 216: 217: this.document.server.elements.blackwhite.value 218: =this.document.client.elements.blackwhite.checked; 219: 220: this.document.server.elements.remember.value 221: =this.document.client.elements.remember.checked; 222: 223: uextkey=this.document.client.elements.uextkey.value; 224: lextkey=this.document.client.elements.lextkey.value; 225: initkeys(); 226: 227: this.document.server.elements.upass.value 228: =crypted(this.document.client.elements.upass.value); 229: 230: this.document.server.submit(); 231: return false; 232: } 233: </script> 234: ENDSCRIPT 235: 236: if ($fullgraph) { 237: $r->print( 238: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 239: } 240: 241: $r->print(<<ENDSERVERFORM); 242: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 243: <input type="hidden" name="logtoken" value="$logtoken" /> 244: <input type="hidden" name="serverid" value="$lonhost" /> 245: <input type="hidden" name="interface" value="$ENV{'form.interface'}" /> 246: <input type="hidden" name="uname" value="" /> 247: <input type="hidden" name="upass" value="" /> 248: <input type="hidden" name="udom" value="" /> 249: <input type="hidden" name="imagesuppress" value="" /> 250: <input type="hidden" name="appletsuppress" value="" /> 251: <input type="hidden" name="embedsuppress" value="" /> 252: <input type="hidden" name="fontenhance" value="" /> 253: <input type="hidden" name="blackwhite" value="" /> 254: <input type="hidden" name="remember" value="" /> 255: </form> 256: ENDSERVERFORM 257: if ($fullgraph) { $r->print(<<ENDTOP); 258:  259: <tr> 260: 261:  262: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 263: </tr> 264: 265:  266: <tr> 267: 268:  269: <td width=182 height=27 bgcolor="$sidebg"> </td> 270: 271:  272: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 273: 274:  275: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 276: 277:  278: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 279: </tr> 280: <tr> 281: 282:  283:  284: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 285: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a> 286: <br /> 287: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a> 288: </td> 289: 290:  291:  292: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 293: 294:  295:  296: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg"> 297: <center> 298: <img src="$logo" alt="" /> 299: </center> 300: </td> 301: 302:  303: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 304: </tr> 305: <tr> 306: 307:  308:  309: <td align="center" valign="middle" bgcolor="$sidebg"> 310: ENDTOP 311: } else { 312: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'); 313: } 314: $r->print('<form name="client" onsubmit="return(send())">'); 315: unless ($fullgraph) { 316: $r->print(<<ENDACCESSOPTIONS); 317: <h3>Select Accessibility Options</h3> 318: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br /> 319: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br /> 320: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br /> 321: <input type="checkbox" name="fontenhance" /> Increase font size<br /> 322: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /> 323: <p>If you have accessibility needs that are not addressed by this interface, 324: please 325: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 326: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 327: ENDACCESSOPTIONS 328: } else { 329: $r->print(<<ENDNOOPT); 330: <input type="hidden" name="imagesuppress" value="" /> 331: <input type="hidden" name="embedsuppress" value="" /> 332: <input type="hidden" name="appletsuppress" value="" /> 333: <input type="hidden" name="fontenhance" value="" /> 334: <input type="hidden" name="blackwhite" value="" /> 335: <input type="hidden" name="remember" value="" /> 336: ENDNOOPT 337: } 338: $r->print(<<ENDLOGIN); 339: <input type="hidden" name="lextkey" value="$lextkey"> 340: <input type="hidden" name="uextkey" value="$uextkey"> 341: 342:  343: <table border=0 cellspacing=0 cellpadding=0> 344: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr> 345: <tr> 346: <td bgcolor="$mainbg"><br /><font size=-1><b>   User Name:</b></font></td> 347: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 348: </tr> 349: <tr> 350: <td bgcolor="$mainbg"><font size=-1><b>   Password:</b></font></td> 351: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td> 352: </tr> 353: <tr> 354: <td bgcolor="$mainbg"><font size=-1><b>   Domain:</b></font></td> 355: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 356: </tr> 357: <tr> 358: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">Help</a></td> 359: <td bgcolor="$mainbg" valign="bottom" align="center"> 360: <br /> 361: <input type="submit" value="Log In" /> 362: </td> 363: </tr> 364: </table> 365:  366: </form> 367: ENDLOGIN 368: if ($fullgraph) { 369: $r->print(<<ENDDOCUMENT); 370: </td> 371: 372:  373: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 374: 375:  376: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 377: </tr> 378: <tr> 379: 380:  381: <td bgcolor="$sidebg" valign="middle" align="left"> 382: <br /> 383: <table border=0 cellspacing=0 cellpadding=0> 384: <tr> 385: <td bgcolor="$sidebg" align="left" valign="top"> 386: <small><b>   Domain: </b></small> 387: </td> 388: <td bgcolor="$sidebg" align="left" valign="top"> 389: <small><tt> $domain</tt></small> 390: </td> 391: </tr> 392: <tr> 393: <td bgcolor="$sidebg" align="left" valign="top"> 394: <small><b>   Server: </b></small> 395: </td> 396: <td bgcolor="$sidebg" align="left" valign="top"> 397: <small><tt> $lonhost ($role)</tt></small> 398: </td> 399: </tr> 400: <tr> 401: <td bgcolor="$sidebg" align="left" valign="top"> 402: <small><b>   Load: </b></small> 403: </td> 404: <td bgcolor="$sidebg" align="left" valign="top"> 405: <small><tt> $loadpercent percent</tt></small> 406: </td> 407: </tr> 408: </table> 409: <br /> 410: <small> 411: <b>   System Administration:</b><br /> 412: <tt>      $sysadm</tt><br /> 413: <b>   Server Administration:</b><br /> 414: <tt>      $servadm<br /> </tt> 415: </small> 416: </td> 417: 418:  419: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 420: 421:  422: <td width="100%" valign="bottom" bgcolor="$mainbg"> 423: $domainlogo 424: </td> 425: 426:  427: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 428: </tr> 429: <tr> 430: 431:  432: <td bgcolor="$sidebg"> </td> 433: 434:  435: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 436: 437:  438: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 439: 440:  441: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 442: </tr> 443: </table> 444: 445: <script> 446: // the if prevents the script error if the browser can't handle this 447: if ( document.client.uname ) { document.client.uname.focus(); } 448: </script> 449: 450: ENDDOCUMENT 451: } 452: $r->print('</body></html>'); 453: return OK; 454: } 455: 456: 1; 457: __END__