Annotation of loncom/auth/lonlogin.pm, revision 1.44
1.1 albertel 1: # The LearningOnline Network
2: # Login Screen
1.11 www 3: #
1.44 ! www 4: # $Id: lonlogin.pm,v 1.43 2003/07/16 20:42:31 www 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');
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');
1.6 www 82: my $include = $r->dir_config('lonIncludes');
1.37 www 83: my $expire = $r->dir_config('lonExpire');
1.44 ! www 84: my $version = $r->dir_config('lonVersion');
1.1 albertel 85:
1.30 www 86: # --------------------------------------------- Default values for login fields
87:
88: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:'');
89: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain);
90:
91: # ---------------------------------------------------------- Determine own load
1.1 albertel 92: my $loadavg;
1.41 albertel 93: {
94: my $loadfile=Apache::File->new('/proc/loadavg');
95: $loadavg=<$loadfile>;
96: }
1.1 albertel 97: $loadavg =~ s/\s.*//g;
98: my $loadpercent=100*$loadavg/$loadlim;
1.41 albertel 99: my $userloadpercent=&Apache::lonnet::userload();
1.1 albertel 100:
1.30 www 101: # ------------------------------------------------------- Do the load balancing
1.10 www 102: my $otherserver='http://'.$ENV{'SERVER_NAME'};
1.31 www 103: my $firsturl=
104: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'});
1.1 albertel 105: # ---------------------------------------- Are we access server and overloaded?
1.41 albertel 106: if (($role eq 'access') &&
107: (($userloadpercent>100.0)||($loadpercent>100.0))) {
108: $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
1.1 albertel 109: }
1.6 www 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);
1.15 www 126: if ($lextkey>2147483647) { $lextkey-=4294967296; }
127:
1.6 www 128: my $uextkey=hex($ukey);
1.15 www 129: if ($uextkey>2147483647) { $uextkey-=4294967296; }
130:
1.31 www 131: # -------------------------------------------------------- Store away log token
1.6 www 132: my $logtoken=Apache::lonnet::reply(
1.7 www 133: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
1.6 www 134: $lonhost);
1.31 www 135:
136: # ------------------- If we cannot talk to ourselves, we are in serious trouble
137:
138: if ($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:
1.20 www 166: my $domainlogo=&Apache::loncommon::domainlogo();
1.38 www 167: $servadm=~s/\,/\<br \/\>/g;
168: $sysadm=~s/\,/\<br \/\>/g;
169:
1.6 www 170: # --------------------------------------------------- Print login screen header
171: $r->print(<<ENDHEADER);
1.1 albertel 172: <html>
173: <head>
1.37 www 174: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />
1.2 www 175: <title>The LearningOnline Network with CAPA Login</title>
1.1 albertel 176: </head>
1.6 www 177: ENDHEADER
178: # ---------------------------------------------------- Serve out DES JavaScript
179: {
180: my $jsh=Apache::File->new($include."/londes.js");
181: $r->print(<$jsh>);
182: }
1.21 www 183:
184: # ----------------------------------------------------------- Front page design
1.35 www 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');
1.21 www 193: my $alink=&Apache::loncommon::designparm('login.alink');
1.35 www 194: my $mainbg=
195: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF');
196: my $sidebg=
197: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF');
1.21 www 198: my $logo=&Apache::loncommon::designparm('login.logo');
199: my $img=&Apache::loncommon::designparm('login.img');
200:
201:
1.6 www 202: # ---------------------------------------------------------- Serve rest of page
1.16 www 203: $r->print(<<ENDSCRIPT);
1.6 www 204:
1.21 www 205: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
1.27 albertel 206: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
1.6 www 207:
1.14 albertel 208: <script language="JavaScript">
209: function send()
210: {
1.6 www 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:
1.33 www 217: this.document.server.elements.imagesuppress.value
1.36 www 218: =this.document.client.elements.imagesuppress.checked;
1.33 www 219:
220: this.document.server.elements.embedsuppress.value
1.36 www 221: =this.document.client.elements.embedsuppress.checked;
1.33 www 222:
1.34 www 223: this.document.server.elements.appletsuppress.value
1.36 www 224: =this.document.client.elements.appletsuppress.checked;
1.34 www 225:
1.33 www 226: this.document.server.elements.fontenhance.value
1.36 www 227: =this.document.client.elements.fontenhance.checked;
1.33 www 228:
229: this.document.server.elements.blackwhite.value
1.36 www 230: =this.document.client.elements.blackwhite.checked;
1.33 www 231:
1.35 www 232: this.document.server.elements.remember.value
1.36 www 233: =this.document.client.elements.remember.checked;
1.35 www 234:
1.6 www 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();
1.19 bowersj2 243: return false;
1.6 www 244: }
1.14 albertel 245: </script>
1.16 www 246: ENDSCRIPT
1.6 www 247:
1.16 www 248: if ($fullgraph) {
249: $r->print(
250: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
251: }
1.6 www 252:
1.16 www 253: $r->print(<<ENDSERVERFORM);
1.14 albertel 254: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
1.33 www 255: <input type="hidden" name="logtoken" value="$logtoken" />
256: <input type="hidden" name="serverid" value="$lonhost" />
257: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
258: <input type="hidden" name="uname" value="" />
259: <input type="hidden" name="upass" value="" />
260: <input type="hidden" name="udom" value="" />
261: <input type="hidden" name="imagesuppress" value="" />
1.34 www 262: <input type="hidden" name="appletsuppress" value="" />
1.33 www 263: <input type="hidden" name="embedsuppress" value="" />
264: <input type="hidden" name="fontenhance" value="" />
265: <input type="hidden" name="blackwhite" value="" />
1.35 www 266: <input type="hidden" name="remember" value="" />
1.43 www 267: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" />
268: <input type="hidden" name="localres" value="$ENV{'form.localres'}" />
1.14 albertel 269: </form>
1.16 www 270: ENDSERVERFORM
271: if ($fullgraph) { $r->print(<<ENDTOP);
1.14 albertel 272: <!-- The LON-CAPA Header -->
273: <tr>
274:
275: <!-- Row 1 Columns 2-4 -->
1.29 www 276: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
1.14 albertel 277: </tr>
278:
279: <!-- The gray bar that starts the two table frames -->
280: <tr>
281:
282: <!-- Row 2 Column 1 -->
1.21 www 283: <td width=182 height=27 bgcolor="$sidebg"> </td>
1.14 albertel 284:
285: <!-- Row 2 Column 2 -->
1.19 bowersj2 286: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
1.14 albertel 287:
288: <!-- Row 2 Column 3 -->
1.19 bowersj2 289: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
1.14 albertel 290:
291: <!-- Row 2 Column 4 -->
1.19 bowersj2 292: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
1.14 albertel 293: </tr>
294: <tr>
295:
296: <!-- A cell that will hold the 'access' and 'about' buttons -->
297: <!-- Row 3 Column 1 -->
1.21 www 298: <td valign="top" height=60 align="center" bgcolor="$sidebg">
1.19 bowersj2 299: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
1.14 albertel 300: <br />
1.19 bowersj2 301: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
1.14 albertel 302: </td>
303:
304: <!-- The shaded space between the two main columns -->
305: <!-- Row 3 Column 2 -->
1.19 bowersj2 306: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 307:
308: <!-- The right main column holding the large LON-CAPA logo-->
309: <!-- Rows 3-4 Column 3 -->
1.21 www 310: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
1.14 albertel 311: <center>
1.21 www 312: <img src="$logo" alt="" />
1.14 albertel 313: </center>
314: </td>
315:
316: <!-- Row 3 Column 4 -->
1.19 bowersj2 317: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 318: </tr>
319: <tr>
320:
321: <!-- The entry form -->
322: <!-- Row 4 Column 1 -->
1.21 www 323: <td align="center" valign="middle" bgcolor="$sidebg">
1.16 www 324: ENDTOP
1.32 www 325: } else {
1.35 www 326: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>');
1.33 www 327: }
328: $r->print('<form name="client" onsubmit="return(send())">');
329: unless ($fullgraph) {
330: $r->print(<<ENDACCESSOPTIONS);
1.35 www 331: <h3>Select Accessibility Options</h3>
1.33 www 332: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
1.34 www 333: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br />
1.33 www 334: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
335: <input type="checkbox" name="fontenhance" /> Increase font size<br />
1.35 www 336: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br />
337: <p>If you have accessibility needs that are not addressed by this interface,
338: please
339: contact the system administrator at <tt>$sysadm</tt>.</p><br />
340: <input type="checkbox" name="remember" /> Remember these settings for next login<hr />
1.33 www 341: ENDACCESSOPTIONS
342: } else {
343: $r->print(<<ENDNOOPT);
344: <input type="hidden" name="imagesuppress" value="" />
345: <input type="hidden" name="embedsuppress" value="" />
1.34 www 346: <input type="hidden" name="appletsuppress" value="" />
1.33 www 347: <input type="hidden" name="fontenhance" value="" />
348: <input type="hidden" name="blackwhite" value="" />
1.35 www 349: <input type="hidden" name="remember" value="" />
1.33 www 350: ENDNOOPT
1.16 www 351: }
352: $r->print(<<ENDLOGIN);
1.14 albertel 353: <input type="hidden" name="lextkey" value="$lextkey">
354: <input type="hidden" name="uextkey" value="$uextkey">
355:
356: <!-- Start the sub-table for text and input alignment -->
357: <table border=0 cellspacing=0 cellpadding=0>
1.21 www 358: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
1.14 albertel 359: <tr>
1.21 www 360: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
1.30 www 361: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
1.14 albertel 362: </tr>
363: <tr>
1.21 www 364: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
365: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
1.14 albertel 366: </tr>
367: <tr>
1.21 www 368: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
1.30 www 369: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
1.14 albertel 370: </tr>
371: <tr>
1.28 www 372: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
373: <td bgcolor="$mainbg" valign="bottom" align="center">
1.14 albertel 374: <br />
1.19 bowersj2 375: <input type="submit" value="Log In" />
1.14 albertel 376: </td>
377: </tr>
378: </table>
379: <!-- End sub-table -->
380: </form>
1.16 www 381: ENDLOGIN
382: if ($fullgraph) {
383: $r->print(<<ENDDOCUMENT);
1.14 albertel 384: </td>
385:
386: <!-- Row 4 Column 2 -->
1.19 bowersj2 387: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 388:
389: <!-- Row 4 Column 4 -->
1.19 bowersj2 390: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 391: </tr>
392: <tr>
393:
394: <!-- Row 5 Column 1 -->
1.21 www 395: <td bgcolor="$sidebg" valign="middle" align="left">
1.14 albertel 396: <br />
397: <table border=0 cellspacing=0 cellpadding=0>
398: <tr>
1.21 www 399: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 400: <small><b> Domain: </b></small>
401: </td>
1.21 www 402: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 403: <small><tt> $domain</tt></small>
404: </td>
405: </tr>
406: <tr>
1.21 www 407: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 408: <small><b> Server: </b></small>
409: </td>
1.21 www 410: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 411: <small><tt> $lonhost ($role)</tt></small>
412: </td>
413: </tr>
414: <tr>
1.21 www 415: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 416: <small><b> Load: </b></small>
417: </td>
1.21 www 418: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 419: <small><tt> $loadpercent percent</tt></small>
1.42 albertel 420: </td>
421: </tr>
422: <tr>
423: <td bgcolor="$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>
1.14 albertel 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 />
1.44 ! www 436: <tt> $servadm</tt><br /> <br />
! 437: $version
1.14 albertel 438: </small>
439: </td>
440:
441: <!-- Row 5 Column 2 -->
1.19 bowersj2 442: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 443:
444: <!-- Row 5 Column 3 -->
1.21 www 445: <td width="100%" valign="bottom" bgcolor="$mainbg">
1.20 www 446: $domainlogo
447: </td>
1.14 albertel 448:
449: <!-- Row 5 Column 4 -->
1.19 bowersj2 450: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 451: </tr>
452: <tr>
453:
454: <!-- Row 6 Column 1 -->
1.21 www 455: <td bgcolor="$sidebg"> </td>
1.14 albertel 456:
457: <!-- Row 6 Column 2 -->
1.19 bowersj2 458: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
1.14 albertel 459:
460: <!-- Row 6 Column 3 -->
1.19 bowersj2 461: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
1.14 albertel 462:
463: <!-- Row 6 Column 4 -->
1.19 bowersj2 464: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
1.14 albertel 465: </tr>
1.1 albertel 466: </table>
1.25 bowersj2 467:
468: <script>
469: // the if prevents the script error if the browser can't handle this
470: if ( document.client.uname ) { document.client.uname.focus(); }
471: </script>
1.14 albertel 472:
1.1 albertel 473: ENDDOCUMENT
1.16 www 474: }
475: $r->print('</body></html>');
1.1 albertel 476: return OK;
477: }
478:
479: 1;
480: __END__
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