Annotation of nsdl/nsdlloncapaorg/lonlogin.pm, revision 1.1
1.1 ! www 1: # The LearningOnline Network
! 2: # Login Screen
! 3: #
! 4: # $Id: lonlogin.pm,v 1.43 2003/07/16 20:42:31 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: $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
! 108: }
! 109:
! 110: # -------------------------------------------------------- Set login parameters
! 111:
! 112: my @hexstr=('0','1','2','3','4','5','6','7',
! 113: '8','9','a','b','c','d','e','f');
! 114: my $lkey='';
! 115: for (0..7) {
! 116: $lkey.=$hexstr[rand(15)];
! 117: }
! 118:
! 119: my $ukey='';
! 120: for (0..7) {
! 121: $ukey.=$hexstr[rand(15)];
! 122: }
! 123:
! 124: my $lextkey=hex($lkey);
! 125: if ($lextkey>2147483647) { $lextkey-=4294967296; }
! 126:
! 127: my $uextkey=hex($ukey);
! 128: if ($uextkey>2147483647) { $uextkey-=4294967296; }
! 129:
! 130: # -------------------------------------------------------- Store away log token
! 131: my $logtoken=Apache::lonnet::reply(
! 132: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
! 133: $lonhost);
! 134:
! 135: # ------------------- If we cannot talk to ourselves, we are in serious trouble
! 136:
! 137: if ($logtoken eq 'con_lost') {
! 138: my $spares='';
! 139: foreach (keys %Apache::lonnet::hostname) {
! 140: if ($_ ne $lonhost) {
! 141: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}.
! 142: '/adm/login?domain='.$authdomain.'">'.
! 143: $Apache::lonnet::hostname{$_}.'</a>';
! 144: if ($Apache::lonnet::spareid{$_}) {
! 145: $spares.=' (preferred)';
! 146: }
! 147: }
! 148: }
! 149: $r->print(<<ENDTROUBLE);
! 150: <html>
! 151: <head><title>The LearningOnline Network with CAPA</title></head>
! 152: <body bgcolor="#FFFFFF">
! 153: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />
! 154: <h3>This LON-CAPA server is temporarily not available for login</h3>
! 155: <p>Please attempt to login to one of the following servers:</p>$spares
! 156: <p>If the problem persists, please contact <tt>$servadm</tt>.</p>
! 157: </body>
! 158: </html>
! 159: ENDTROUBLE
! 160: return OK;
! 161: }
! 162:
! 163: # ----------------------------------------------- Apparently we are in business
! 164:
! 165: my $domainlogo=&Apache::loncommon::domainlogo();
! 166: $servadm=~s/\,/\<br \/\>/g;
! 167: $sysadm=~s/\,/\<br \/\>/g;
! 168:
! 169: # --------------------------------------------------- Print login screen header
! 170: $r->print(<<ENDHEADER);
! 171: <html>
! 172: <head>
! 173: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />
! 174: <title>The LearningOnline Network with CAPA Login</title>
! 175: </head>
! 176: ENDHEADER
! 177: # ---------------------------------------------------- Serve out DES JavaScript
! 178: {
! 179: my $jsh=Apache::File->new($include."/londes.js");
! 180: $r->print(<$jsh>);
! 181: }
! 182:
! 183: # ----------------------------------------------------------- Front page design
! 184: my $pgbg=
! 185: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF');
! 186: my $font=
! 187: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000');
! 188: my $link=
! 189: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF');
! 190: my $vlink=
! 191: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF');
! 192: my $alink=&Apache::loncommon::designparm('login.alink');
! 193: my $mainbg=
! 194: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF');
! 195: my $sidebg=
! 196: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF');
! 197: my $logo=&Apache::loncommon::designparm('login.logo');
! 198: my $img=&Apache::loncommon::designparm('login.img');
! 199:
! 200:
! 201: # ---------------------------------------------------------- Serve rest of page
! 202: $r->print(<<ENDSCRIPT);
! 203:
! 204: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
! 205: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
! 206:
! 207: <script language="JavaScript">
! 208: function send()
! 209: {
! 210: this.document.server.elements.uname.value
! 211: =this.document.client.elements.uname.value;
! 212:
! 213: this.document.server.elements.udom.value
! 214: =this.document.client.elements.udom.value;
! 215:
! 216: this.document.server.elements.imagesuppress.value
! 217: =this.document.client.elements.imagesuppress.checked;
! 218:
! 219: this.document.server.elements.embedsuppress.value
! 220: =this.document.client.elements.embedsuppress.checked;
! 221:
! 222: this.document.server.elements.appletsuppress.value
! 223: =this.document.client.elements.appletsuppress.checked;
! 224:
! 225: this.document.server.elements.fontenhance.value
! 226: =this.document.client.elements.fontenhance.checked;
! 227:
! 228: this.document.server.elements.blackwhite.value
! 229: =this.document.client.elements.blackwhite.checked;
! 230:
! 231: this.document.server.elements.remember.value
! 232: =this.document.client.elements.remember.checked;
! 233:
! 234: uextkey=this.document.client.elements.uextkey.value;
! 235: lextkey=this.document.client.elements.lextkey.value;
! 236: initkeys();
! 237:
! 238: this.document.server.elements.upass.value
! 239: =crypted(this.document.client.elements.upass.value);
! 240:
! 241: this.document.server.submit();
! 242: return false;
! 243: }
! 244: </script>
! 245: ENDSCRIPT
! 246:
! 247: if ($fullgraph) {
! 248: $r->print(
! 249: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
! 250: }
! 251:
! 252: $r->print(<<ENDSERVERFORM);
! 253: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
! 254: <input type="hidden" name="logtoken" value="$logtoken" />
! 255: <input type="hidden" name="serverid" value="$lonhost" />
! 256: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
! 257: <input type="hidden" name="uname" value="" />
! 258: <input type="hidden" name="upass" value="" />
! 259: <input type="hidden" name="udom" value="" />
! 260: <input type="hidden" name="imagesuppress" value="" />
! 261: <input type="hidden" name="appletsuppress" value="" />
! 262: <input type="hidden" name="embedsuppress" value="" />
! 263: <input type="hidden" name="fontenhance" value="" />
! 264: <input type="hidden" name="blackwhite" value="" />
! 265: <input type="hidden" name="remember" value="" />
! 266: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" />
! 267: <input type="hidden" name="localres" value="$ENV{'form.localres'}" />
! 268: </form>
! 269: ENDSERVERFORM
! 270: if ($fullgraph) { $r->print(<<ENDTOP);
! 271: <!-- The LON-CAPA Header -->
! 272: <tr>
! 273:
! 274: <!-- Row 1 Columns 2-4 -->
! 275: <td width="100%" colspan=4 bgcolor="$pgbg"><h1><font color="white">Welcome to the LON-CAPA NSDL Gateway</font></h1><a href="/cgi-bin/signon.pl"><h3><font color="white">Sign up for a Guest Login</font></h3></a></td>
! 276: </tr>
! 277:
! 278: <!-- The gray bar that starts the two table frames -->
! 279: <tr>
! 280:
! 281: <!-- Row 2 Column 1 -->
! 282: <td width=182 height=27 bgcolor="$sidebg"> </td>
! 283:
! 284: <!-- Row 2 Column 2 -->
! 285: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
! 286:
! 287: <!-- Row 2 Column 3 -->
! 288: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
! 289:
! 290: <!-- Row 2 Column 4 -->
! 291: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
! 292: </tr>
! 293: <tr>
! 294:
! 295: <!-- A cell that will hold the 'access' and 'about' buttons -->
! 296: <!-- Row 3 Column 1 -->
! 297: <td valign="top" height=60 align="center" bgcolor="$sidebg">
! 298: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
! 299: <br />
! 300: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
! 301: </td>
! 302:
! 303: <!-- The shaded space between the two main columns -->
! 304: <!-- Row 3 Column 2 -->
! 305: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
! 306:
! 307: <!-- The right main column holding the large LON-CAPA logo-->
! 308: <!-- Rows 3-4 Column 3 -->
! 309: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
! 310: <center>
! 311: <img src="$logo" alt="" />
! 312: </center>
! 313: </td>
! 314:
! 315: <!-- Row 3 Column 4 -->
! 316: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
! 317: </tr>
! 318: <tr>
! 319:
! 320: <!-- The entry form -->
! 321: <!-- Row 4 Column 1 -->
! 322: <td align="center" valign="middle" bgcolor="$sidebg">
! 323: ENDTOP
! 324: } else {
! 325: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>');
! 326: }
! 327: $r->print('<form name="client" onsubmit="return(send())">');
! 328: unless ($fullgraph) {
! 329: $r->print(<<ENDACCESSOPTIONS);
! 330: <h3>Select Accessibility Options</h3>
! 331: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
! 332: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br />
! 333: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
! 334: <input type="checkbox" name="fontenhance" /> Increase font size<br />
! 335: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br />
! 336: <p>If you have accessibility needs that are not addressed by this interface,
! 337: please
! 338: contact the system administrator at <tt>$sysadm</tt>.</p><br />
! 339: <input type="checkbox" name="remember" /> Remember these settings for next login<hr />
! 340: ENDACCESSOPTIONS
! 341: } else {
! 342: $r->print(<<ENDNOOPT);
! 343: <input type="hidden" name="imagesuppress" value="" />
! 344: <input type="hidden" name="embedsuppress" value="" />
! 345: <input type="hidden" name="appletsuppress" value="" />
! 346: <input type="hidden" name="fontenhance" value="" />
! 347: <input type="hidden" name="blackwhite" value="" />
! 348: <input type="hidden" name="remember" value="" />
! 349: ENDNOOPT
! 350: }
! 351: $r->print(<<ENDLOGIN);
! 352: <input type="hidden" name="lextkey" value="$lextkey">
! 353: <input type="hidden" name="uextkey" value="$uextkey">
! 354:
! 355: <!-- Start the sub-table for text and input alignment -->
! 356: <table border=0 cellspacing=0 cellpadding=0>
! 357: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
! 358: <tr>
! 359: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
! 360: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
! 361: </tr>
! 362: <tr>
! 363: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
! 364: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
! 365: </tr>
! 366: <tr>
! 367: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
! 368: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
! 369: </tr>
! 370: <tr>
! 371: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
! 372: <td bgcolor="$mainbg" valign="bottom" align="center">
! 373: <br />
! 374: <input type="submit" value="Log In" />
! 375: </td>
! 376: </tr>
! 377: </table>
! 378: <!-- End sub-table -->
! 379: </form>
! 380: ENDLOGIN
! 381: if ($fullgraph) {
! 382: $r->print(<<ENDDOCUMENT);
! 383: </td>
! 384:
! 385: <!-- Row 4 Column 2 -->
! 386: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
! 387:
! 388: <!-- Row 4 Column 4 -->
! 389: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
! 390: </tr>
! 391: <tr>
! 392:
! 393: <!-- Row 5 Column 1 -->
! 394: <td bgcolor="$sidebg" valign="middle" align="left">
! 395: <br />
! 396: <table border=0 cellspacing=0 cellpadding=0>
! 397: <tr>
! 398: <td bgcolor="$sidebg" align="left" valign="top">
! 399: <small><b> Domain: </b></small>
! 400: </td>
! 401: <td bgcolor="$sidebg" align="left" valign="top">
! 402: <small><tt> $domain</tt></small>
! 403: </td>
! 404: </tr>
! 405: <tr>
! 406: <td bgcolor="$sidebg" align="left" valign="top">
! 407: <small><b> Server: </b></small>
! 408: </td>
! 409: <td bgcolor="$sidebg" align="left" valign="top">
! 410: <small><tt> $lonhost ($role)</tt></small>
! 411: </td>
! 412: </tr>
! 413: <tr>
! 414: <td bgcolor="$sidebg" align="left" valign="top">
! 415: <small><b> Load: </b></small>
! 416: </td>
! 417: <td bgcolor="$sidebg" align="left" valign="top">
! 418: <small><tt> $loadpercent percent</tt></small>
! 419: </td>
! 420: </tr>
! 421: <tr>
! 422: <td bgcolor="$sidebg" align="left" valign="top">
! 423: <small><b> User Load: </b></small>
! 424: </td>
! 425: <td bgcolor="$sidebg" align="left" valign="top">
! 426: <small><tt> $userloadpercent percent</tt></small>
! 427: </td>
! 428: </tr>
! 429: </table>
! 430: <br />
! 431: <small>
! 432: <b> System Administration:</b><br />
! 433: <tt> $sysadm</tt><br />
! 434: <b> Server Administration:</b><br />
! 435: <tt> $servadm<br /> </tt>
! 436: </small>
! 437: </td>
! 438:
! 439: <!-- Row 5 Column 2 -->
! 440: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
! 441:
! 442: <!-- Row 5 Column 3 -->
! 443: <td width="100%" valign="bottom" bgcolor="$mainbg">
! 444: $domainlogo
! 445: </td>
! 446:
! 447: <!-- Row 5 Column 4 -->
! 448: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
! 449: </tr>
! 450: <tr>
! 451:
! 452: <!-- Row 6 Column 1 -->
! 453: <td bgcolor="$sidebg"> </td>
! 454:
! 455: <!-- Row 6 Column 2 -->
! 456: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
! 457:
! 458: <!-- Row 6 Column 3 -->
! 459: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
! 460:
! 461: <!-- Row 6 Column 4 -->
! 462: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
! 463: </tr>
! 464: </table>
! 465:
! 466: <script>
! 467: // the if prevents the script error if the browser can't handle this
! 468: if ( document.client.uname ) { document.client.uname.focus(); }
! 469: </script>
! 470:
! 471: ENDDOCUMENT
! 472: }
! 473: $r->print('</body></html>');
! 474: return OK;
! 475: }
! 476:
! 477: 1;
! 478: __END__
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