Annotation of loncom/auth/lonlogin.pm, revision 1.48
1.1 albertel 1: # The LearningOnline Network
2: # Login Screen
1.11 www 3: #
1.48 ! albertel 4: # $Id: lonlogin.pm,v 1.47 2003/08/26 19:41:53 albertel Exp $
1.11 www 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: #
1.2 www 28: # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
1.10 www 29: # 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9,
30: # 1/17/01 Gerd Kortemeyer
1.1 albertel 31: #
1.14 albertel 32: # 2/7/02,2/8,2/12,2/14,2/15,2/19 Josh Brunskole
1.19 bowersj2 33: #
34: # 7/10/02 Jeremy Bowers
1.14 albertel 35:
1.1 albertel 36: package Apache::lonlogin;
37:
38: use strict;
39: use Apache::Constants qw(:common);
40: use Apache::File ();
41: use Apache::lonnet();
1.12 albertel 42: use Apache::loncommon();
1.1 albertel 43:
44: sub handler {
45: my $r = shift;
46: $r->content_type('text/html');
1.12 albertel 47: &Apache::loncommon::no_cache($r);
1.1 albertel 48: $r->send_http_header;
49: return OK if $r->header_only;
50:
1.16 www 51:
52: &Apache::loncommon::get_unprocessed_cgi
1.39 www 53: ($ENV{'QUERY_STRING'}.'&'.$ENV{'request.querystring'},
1.43 www 54: ['interface','username','domain','firsturl','localpath','localres']);
1.39 www 55:
1.32 www 56: # ----------------------------------------------------------- Process Interface
1.18 www 57: $ENV{'form.interface'}=~s/\W//g;
1.16 www 58:
1.32 www 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:
1.16 www 68: my $fullgraph=($ENV{'form.interface'} ne 'textual');
1.40 albertel 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.
1.26 www 74: $r->dir_config('lonIconsURL');
1.1 albertel 75: my $domain = $r->dir_config('lonDefDomain');
1.46 www 76: if (($ENV{'form.domain'}) &&
77: ($Apache::lonnet::domaindescription{$ENV{'form.domain'}})) {
78: $domain=$ENV{'form.domain'};
79: }
1.1 albertel 80: my $role = $r->dir_config('lonRole');
81: my $loadlim = $r->dir_config('lonLoadLim');
82: my $servadm = $r->dir_config('lonAdmEMail');
83: my $sysadm = $r->dir_config('lonSysEMail');
84: my $lonhost = $r->dir_config('lonHostID');
85: my $tabdir = $r->dir_config('lonTabDir');
1.6 www 86: my $include = $r->dir_config('lonIncludes');
1.37 www 87: my $expire = $r->dir_config('lonExpire');
1.44 www 88: my $version = $r->dir_config('lonVersion');
1.1 albertel 89:
1.30 www 90: # --------------------------------------------- Default values for login fields
91:
92: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:'');
93: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain);
94:
95: # ---------------------------------------------------------- Determine own load
1.1 albertel 96: my $loadavg;
1.41 albertel 97: {
98: my $loadfile=Apache::File->new('/proc/loadavg');
99: $loadavg=<$loadfile>;
100: }
1.1 albertel 101: $loadavg =~ s/\s.*//g;
102: my $loadpercent=100*$loadavg/$loadlim;
1.41 albertel 103: my $userloadpercent=&Apache::lonnet::userload();
1.1 albertel 104:
1.30 www 105: # ------------------------------------------------------- Do the load balancing
1.10 www 106: my $otherserver='http://'.$ENV{'SERVER_NAME'};
1.31 www 107: my $firsturl=
108: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'});
1.1 albertel 109: # ---------------------------------------- Are we access server and overloaded?
1.41 albertel 110: if (($role eq 'access') &&
111: (($userloadpercent>100.0)||($loadpercent>100.0))) {
1.47 albertel 112: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
113: if ($unloaded) { $otherserver=$unloaded; }
1.1 albertel 114: }
1.6 www 115:
1.45 www 116: # ----------------------------------------------------------- Get announcements
117: my $announcements=&Apache::lonnet::getannounce();
1.6 www 118: # -------------------------------------------------------- Set login parameters
119:
120: my @hexstr=('0','1','2','3','4','5','6','7',
121: '8','9','a','b','c','d','e','f');
122: my $lkey='';
123: for (0..7) {
124: $lkey.=$hexstr[rand(15)];
125: }
126:
127: my $ukey='';
128: for (0..7) {
129: $ukey.=$hexstr[rand(15)];
130: }
131:
132: my $lextkey=hex($lkey);
1.15 www 133: if ($lextkey>2147483647) { $lextkey-=4294967296; }
134:
1.6 www 135: my $uextkey=hex($ukey);
1.15 www 136: if ($uextkey>2147483647) { $uextkey-=4294967296; }
137:
1.31 www 138: # -------------------------------------------------------- Store away log token
1.6 www 139: my $logtoken=Apache::lonnet::reply(
1.7 www 140: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
1.6 www 141: $lonhost);
1.31 www 142:
143: # ------------------- If we cannot talk to ourselves, we are in serious trouble
144:
145: if ($logtoken eq 'con_lost') {
146: my $spares='';
147: foreach (keys %Apache::lonnet::hostname) {
148: if ($_ ne $lonhost) {
149: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}.
150: '/adm/login?domain='.$authdomain.'">'.
151: $Apache::lonnet::hostname{$_}.'</a>';
152: if ($Apache::lonnet::spareid{$_}) {
153: $spares.=' (preferred)';
154: }
155: }
156: }
157: $r->print(<<ENDTROUBLE);
158: <html>
159: <head><title>The LearningOnline Network with CAPA</title></head>
160: <body bgcolor="#FFFFFF">
161: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />
162: <h3>This LON-CAPA server is temporarily not available for login</h3>
163: <p>Please attempt to login to one of the following servers:</p>$spares
164: <p>If the problem persists, please contact <tt>$servadm</tt>.</p>
165: </body>
166: </html>
167: ENDTROUBLE
168: return OK;
169: }
170:
171: # ----------------------------------------------- Apparently we are in business
172:
1.48 ! albertel 173: my $domainlogo=&Apache::loncommon::domainlogo($domain);
1.38 www 174: $servadm=~s/\,/\<br \/\>/g;
175: $sysadm=~s/\,/\<br \/\>/g;
176:
1.6 www 177: # --------------------------------------------------- Print login screen header
178: $r->print(<<ENDHEADER);
1.1 albertel 179: <html>
180: <head>
1.37 www 181: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />
1.2 www 182: <title>The LearningOnline Network with CAPA Login</title>
1.1 albertel 183: </head>
1.6 www 184: ENDHEADER
185: # ---------------------------------------------------- Serve out DES JavaScript
186: {
187: my $jsh=Apache::File->new($include."/londes.js");
188: $r->print(<$jsh>);
189: }
1.21 www 190:
191: # ----------------------------------------------------------- Front page design
1.35 www 192: my $pgbg=
1.46 www 193: ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');
1.35 www 194: my $font=
1.46 www 195: ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');
1.35 www 196: my $link=
1.46 www 197: ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');
1.35 www 198: my $vlink=
1.46 www 199: ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');
200: my $alink=&Apache::loncommon::designparm('login.alink',$domain);
1.35 www 201: my $mainbg=
1.46 www 202: ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');
1.35 www 203: my $sidebg=
1.46 www 204: ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF');
205: my $logo=&Apache::loncommon::designparm('login.logo',$domain);
206: my $img=&Apache::loncommon::designparm('login.img',$domain);
1.21 www 207:
208:
1.6 www 209: # ---------------------------------------------------------- Serve rest of page
1.16 www 210: $r->print(<<ENDSCRIPT);
1.6 www 211:
1.21 www 212: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
1.27 albertel 213: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
1.6 www 214:
1.14 albertel 215: <script language="JavaScript">
216: function send()
217: {
1.6 www 218: this.document.server.elements.uname.value
219: =this.document.client.elements.uname.value;
220:
221: this.document.server.elements.udom.value
222: =this.document.client.elements.udom.value;
223:
1.33 www 224: this.document.server.elements.imagesuppress.value
1.36 www 225: =this.document.client.elements.imagesuppress.checked;
1.33 www 226:
227: this.document.server.elements.embedsuppress.value
1.36 www 228: =this.document.client.elements.embedsuppress.checked;
1.33 www 229:
1.34 www 230: this.document.server.elements.appletsuppress.value
1.36 www 231: =this.document.client.elements.appletsuppress.checked;
1.34 www 232:
1.33 www 233: this.document.server.elements.fontenhance.value
1.36 www 234: =this.document.client.elements.fontenhance.checked;
1.33 www 235:
236: this.document.server.elements.blackwhite.value
1.36 www 237: =this.document.client.elements.blackwhite.checked;
1.33 www 238:
1.35 www 239: this.document.server.elements.remember.value
1.36 www 240: =this.document.client.elements.remember.checked;
1.35 www 241:
1.6 www 242: uextkey=this.document.client.elements.uextkey.value;
243: lextkey=this.document.client.elements.lextkey.value;
244: initkeys();
245:
246: this.document.server.elements.upass.value
247: =crypted(this.document.client.elements.upass.value);
248:
249: this.document.server.submit();
1.19 bowersj2 250: return false;
1.6 www 251: }
1.14 albertel 252: </script>
1.16 www 253: ENDSCRIPT
1.6 www 254:
1.16 www 255: if ($fullgraph) {
256: $r->print(
257: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
258: }
1.6 www 259:
1.16 www 260: $r->print(<<ENDSERVERFORM);
1.14 albertel 261: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
1.33 www 262: <input type="hidden" name="logtoken" value="$logtoken" />
263: <input type="hidden" name="serverid" value="$lonhost" />
264: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
265: <input type="hidden" name="uname" value="" />
266: <input type="hidden" name="upass" value="" />
267: <input type="hidden" name="udom" value="" />
268: <input type="hidden" name="imagesuppress" value="" />
1.34 www 269: <input type="hidden" name="appletsuppress" value="" />
1.33 www 270: <input type="hidden" name="embedsuppress" value="" />
271: <input type="hidden" name="fontenhance" value="" />
272: <input type="hidden" name="blackwhite" value="" />
1.35 www 273: <input type="hidden" name="remember" value="" />
1.43 www 274: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" />
275: <input type="hidden" name="localres" value="$ENV{'form.localres'}" />
1.14 albertel 276: </form>
1.16 www 277: ENDSERVERFORM
278: if ($fullgraph) { $r->print(<<ENDTOP);
1.14 albertel 279: <!-- The LON-CAPA Header -->
280: <tr>
281:
282: <!-- Row 1 Columns 2-4 -->
1.29 www 283: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
1.14 albertel 284: </tr>
285:
286: <!-- The gray bar that starts the two table frames -->
287: <tr>
288:
289: <!-- Row 2 Column 1 -->
1.21 www 290: <td width=182 height=27 bgcolor="$sidebg"> </td>
1.14 albertel 291:
292: <!-- Row 2 Column 2 -->
1.19 bowersj2 293: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
1.14 albertel 294:
295: <!-- Row 2 Column 3 -->
1.19 bowersj2 296: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
1.14 albertel 297:
298: <!-- Row 2 Column 4 -->
1.19 bowersj2 299: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
1.14 albertel 300: </tr>
301: <tr>
302:
303: <!-- A cell that will hold the 'access' and 'about' buttons -->
304: <!-- Row 3 Column 1 -->
1.21 www 305: <td valign="top" height=60 align="center" bgcolor="$sidebg">
1.19 bowersj2 306: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
1.14 albertel 307: <br />
1.19 bowersj2 308: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
1.14 albertel 309: </td>
310:
311: <!-- The shaded space between the two main columns -->
312: <!-- Row 3 Column 2 -->
1.19 bowersj2 313: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 314:
315: <!-- The right main column holding the large LON-CAPA logo-->
316: <!-- Rows 3-4 Column 3 -->
1.45 www 317: <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg">
1.14 albertel 318: <center>
1.21 www 319: <img src="$logo" alt="" />
1.14 albertel 320: </center>
321: </td>
322:
323: <!-- Row 3 Column 4 -->
1.19 bowersj2 324: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 325: </tr>
326: <tr>
327:
328: <!-- The entry form -->
329: <!-- Row 4 Column 1 -->
1.21 www 330: <td align="center" valign="middle" bgcolor="$sidebg">
1.16 www 331: ENDTOP
1.32 www 332: } else {
1.45 www 333: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements);
1.33 www 334: }
335: $r->print('<form name="client" onsubmit="return(send())">');
336: unless ($fullgraph) {
337: $r->print(<<ENDACCESSOPTIONS);
1.35 www 338: <h3>Select Accessibility Options</h3>
1.33 www 339: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
1.34 www 340: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br />
1.33 www 341: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
342: <input type="checkbox" name="fontenhance" /> Increase font size<br />
1.35 www 343: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br />
344: <p>If you have accessibility needs that are not addressed by this interface,
345: please
346: contact the system administrator at <tt>$sysadm</tt>.</p><br />
347: <input type="checkbox" name="remember" /> Remember these settings for next login<hr />
1.33 www 348: ENDACCESSOPTIONS
349: } else {
350: $r->print(<<ENDNOOPT);
351: <input type="hidden" name="imagesuppress" value="" />
352: <input type="hidden" name="embedsuppress" value="" />
1.34 www 353: <input type="hidden" name="appletsuppress" value="" />
1.33 www 354: <input type="hidden" name="fontenhance" value="" />
355: <input type="hidden" name="blackwhite" value="" />
1.35 www 356: <input type="hidden" name="remember" value="" />
1.33 www 357: ENDNOOPT
1.16 www 358: }
359: $r->print(<<ENDLOGIN);
1.14 albertel 360: <input type="hidden" name="lextkey" value="$lextkey">
361: <input type="hidden" name="uextkey" value="$uextkey">
362:
363: <!-- Start the sub-table for text and input alignment -->
364: <table border=0 cellspacing=0 cellpadding=0>
1.21 www 365: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
1.14 albertel 366: <tr>
1.21 www 367: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
1.30 www 368: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
1.14 albertel 369: </tr>
370: <tr>
1.21 www 371: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
372: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
1.14 albertel 373: </tr>
374: <tr>
1.21 www 375: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
1.30 www 376: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
1.14 albertel 377: </tr>
378: <tr>
1.28 www 379: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
380: <td bgcolor="$mainbg" valign="bottom" align="center">
1.14 albertel 381: <br />
1.19 bowersj2 382: <input type="submit" value="Log In" />
1.14 albertel 383: </td>
384: </tr>
385: </table>
386: <!-- End sub-table -->
387: </form>
1.16 www 388: ENDLOGIN
389: if ($fullgraph) {
390: $r->print(<<ENDDOCUMENT);
1.14 albertel 391: </td>
392:
393: <!-- Row 4 Column 2 -->
1.19 bowersj2 394: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.45 www 395:
396: <!-- Row 4 Column 3 -->
397: <td bgcolor="$mainbg">$announcements</td>
1.14 albertel 398:
399: <!-- Row 4 Column 4 -->
1.19 bowersj2 400: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 401: </tr>
402: <tr>
403:
404: <!-- Row 5 Column 1 -->
1.21 www 405: <td bgcolor="$sidebg" valign="middle" align="left">
1.14 albertel 406: <br />
407: <table border=0 cellspacing=0 cellpadding=0>
408: <tr>
1.21 www 409: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 410: <small><b> Domain: </b></small>
411: </td>
1.21 www 412: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 413: <small><tt> $domain</tt></small>
414: </td>
415: </tr>
416: <tr>
1.21 www 417: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 418: <small><b> Server: </b></small>
419: </td>
1.21 www 420: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 421: <small><tt> $lonhost ($role)</tt></small>
422: </td>
423: </tr>
424: <tr>
1.21 www 425: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 426: <small><b> Load: </b></small>
427: </td>
1.21 www 428: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 429: <small><tt> $loadpercent percent</tt></small>
1.42 albertel 430: </td>
431: </tr>
432: <tr>
433: <td bgcolor="$sidebg" align="left" valign="top">
434: <small><b> User Load: </b></small>
435: </td>
436: <td bgcolor="$sidebg" align="left" valign="top">
437: <small><tt> $userloadpercent percent</tt></small>
1.14 albertel 438: </td>
439: </tr>
440: </table>
441: <br />
442: <small>
443: <b> System Administration:</b><br />
444: <tt> $sysadm</tt><br />
445: <b> Server Administration:</b><br />
1.44 www 446: <tt> $servadm</tt><br /> <br />
447: $version
1.14 albertel 448: </small>
449: </td>
450:
451: <!-- Row 5 Column 2 -->
1.19 bowersj2 452: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 453:
454: <!-- Row 5 Column 3 -->
1.21 www 455: <td width="100%" valign="bottom" bgcolor="$mainbg">
1.20 www 456: $domainlogo
457: </td>
1.14 albertel 458:
459: <!-- Row 5 Column 4 -->
1.19 bowersj2 460: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 461: </tr>
462: <tr>
463:
464: <!-- Row 6 Column 1 -->
1.21 www 465: <td bgcolor="$sidebg"> </td>
1.14 albertel 466:
467: <!-- Row 6 Column 2 -->
1.19 bowersj2 468: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
1.14 albertel 469:
470: <!-- Row 6 Column 3 -->
1.19 bowersj2 471: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
1.14 albertel 472:
473: <!-- Row 6 Column 4 -->
1.19 bowersj2 474: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
1.14 albertel 475: </tr>
1.1 albertel 476: </table>
1.25 bowersj2 477:
478: <script>
479: // the if prevents the script error if the browser can't handle this
480: if ( document.client.uname ) { document.client.uname.focus(); }
481: </script>
1.14 albertel 482:
1.1 albertel 483: ENDDOCUMENT
1.16 www 484: }
485: $r->print('</body></html>');
1.1 albertel 486: return OK;
487: }
488:
489: 1;
490: __END__
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