Annotation of nsdl/nsdlloncapaorg/lonlogin.pm, revision 1.3
1.1 www 1: # The LearningOnline Network
2: # Login Screen
3: #
1.3 ! www 4: # $Id: lonlogin.pm,v 1.2 2003/07/28 20:30:21 www Exp $
1.1 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: #
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))) {
1.3 ! www 107: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
! 108: if ($unloaded) { $otherserver=$unloaded; }
1.1 www 109: }
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);
126: if ($lextkey>2147483647) { $lextkey-=4294967296; }
127:
128: my $uextkey=hex($ukey);
129: if ($uextkey>2147483647) { $uextkey-=4294967296; }
130:
131: # -------------------------------------------------------- Store away log token
132: my $logtoken=Apache::lonnet::reply(
133: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
134: $lonhost);
135:
136: # ------------------- If we cannot talk to ourselves, we are in serious trouble
137:
138: if ($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:
166: my $domainlogo=&Apache::loncommon::domainlogo();
167: $servadm=~s/\,/\<br \/\>/g;
168: $sysadm=~s/\,/\<br \/\>/g;
169:
170: # --------------------------------------------------- Print login screen header
171: $r->print(<<ENDHEADER);
172: <html>
173: <head>
174: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />
175: <title>The LearningOnline Network with CAPA Login</title>
176: </head>
177: ENDHEADER
178: # ---------------------------------------------------- Serve out DES JavaScript
179: {
180: my $jsh=Apache::File->new($include."/londes.js");
181: $r->print(<$jsh>);
182: }
183:
184: # ----------------------------------------------------------- Front page design
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');
193: my $alink=&Apache::loncommon::designparm('login.alink');
194: my $mainbg=
195: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF');
196: my $sidebg=
197: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF');
198: my $logo=&Apache::loncommon::designparm('login.logo');
199: my $img=&Apache::loncommon::designparm('login.img');
200:
201:
202: # ---------------------------------------------------------- Serve rest of page
203: $r->print(<<ENDSCRIPT);
204:
205: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
206: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
207:
208: <script language="JavaScript">
209: function send()
210: {
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:
217: this.document.server.elements.imagesuppress.value
218: =this.document.client.elements.imagesuppress.checked;
219:
220: this.document.server.elements.embedsuppress.value
221: =this.document.client.elements.embedsuppress.checked;
222:
223: this.document.server.elements.appletsuppress.value
224: =this.document.client.elements.appletsuppress.checked;
225:
226: this.document.server.elements.fontenhance.value
227: =this.document.client.elements.fontenhance.checked;
228:
229: this.document.server.elements.blackwhite.value
230: =this.document.client.elements.blackwhite.checked;
231:
232: this.document.server.elements.remember.value
233: =this.document.client.elements.remember.checked;
234:
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();
243: return false;
244: }
245: </script>
246: ENDSCRIPT
247:
248: if ($fullgraph) {
249: $r->print(
250: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
251: }
252:
253: $r->print(<<ENDSERVERFORM);
254: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
255: <input type="hidden" name="logtoken" value="$logtoken" />
256: <input type="hidden" name="serverid" value="$lonhost" />
257: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
258: <input type="hidden" name="uname" value="" />
259: <input type="hidden" name="upass" value="" />
260: <input type="hidden" name="udom" value="" />
261: <input type="hidden" name="imagesuppress" value="" />
262: <input type="hidden" name="appletsuppress" value="" />
263: <input type="hidden" name="embedsuppress" value="" />
264: <input type="hidden" name="fontenhance" value="" />
265: <input type="hidden" name="blackwhite" value="" />
266: <input type="hidden" name="remember" value="" />
267: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" />
268: <input type="hidden" name="localres" value="$ENV{'form.localres'}" />
269: </form>
270: ENDSERVERFORM
271: if ($fullgraph) { $r->print(<<ENDTOP);
272: <!-- The LON-CAPA Header -->
273: <tr>
274:
275: <!-- Row 1 Columns 2-4 -->
1.2 www 276: <td width="100%" colspan=4 bgcolor="$sidebg"><h1><font color="$pgbg">Welcome to the LON-CAPA NSDL Gateway</font></h1><a href="/cgi-bin/signon.pl"><h3><font color="$pgbg">Sign up for a Guest Login</font></h3></a></td>
1.1 www 277: </tr>
278:
279: <!-- The gray bar that starts the two table frames -->
280: <tr>
281:
282: <!-- Row 2 Column 1 -->
283: <td width=182 height=27 bgcolor="$sidebg"> </td>
284:
285: <!-- Row 2 Column 2 -->
286: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
287:
288: <!-- Row 2 Column 3 -->
289: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
290:
291: <!-- Row 2 Column 4 -->
292: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
293: </tr>
294: <tr>
295:
296: <!-- A cell that will hold the 'access' and 'about' buttons -->
297: <!-- Row 3 Column 1 -->
298: <td valign="top" height=60 align="center" bgcolor="$sidebg">
299: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
300: <br />
301: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
302: </td>
303:
304: <!-- The shaded space between the two main columns -->
305: <!-- Row 3 Column 2 -->
306: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
307:
308: <!-- The right main column holding the large LON-CAPA logo-->
309: <!-- Rows 3-4 Column 3 -->
310: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
311: <center>
312: <img src="$logo" alt="" />
313: </center>
314: </td>
315:
316: <!-- Row 3 Column 4 -->
317: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
318: </tr>
319: <tr>
320:
321: <!-- The entry form -->
322: <!-- Row 4 Column 1 -->
323: <td align="center" valign="middle" bgcolor="$sidebg">
324: ENDTOP
325: } else {
326: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>');
327: }
328: $r->print('<form name="client" onsubmit="return(send())">');
329: unless ($fullgraph) {
330: $r->print(<<ENDACCESSOPTIONS);
331: <h3>Select Accessibility Options</h3>
332: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
333: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br />
334: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
335: <input type="checkbox" name="fontenhance" /> Increase font size<br />
336: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br />
337: <p>If you have accessibility needs that are not addressed by this interface,
338: please
339: contact the system administrator at <tt>$sysadm</tt>.</p><br />
340: <input type="checkbox" name="remember" /> Remember these settings for next login<hr />
341: ENDACCESSOPTIONS
342: } else {
343: $r->print(<<ENDNOOPT);
344: <input type="hidden" name="imagesuppress" value="" />
345: <input type="hidden" name="embedsuppress" value="" />
346: <input type="hidden" name="appletsuppress" value="" />
347: <input type="hidden" name="fontenhance" value="" />
348: <input type="hidden" name="blackwhite" value="" />
349: <input type="hidden" name="remember" value="" />
350: ENDNOOPT
351: }
352: $r->print(<<ENDLOGIN);
353: <input type="hidden" name="lextkey" value="$lextkey">
354: <input type="hidden" name="uextkey" value="$uextkey">
355:
356: <!-- Start the sub-table for text and input alignment -->
357: <table border=0 cellspacing=0 cellpadding=0>
358: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
359: <tr>
360: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
361: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
362: </tr>
363: <tr>
364: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
365: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
366: </tr>
367: <tr>
368: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
369: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
370: </tr>
371: <tr>
372: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
373: <td bgcolor="$mainbg" valign="bottom" align="center">
374: <br />
375: <input type="submit" value="Log In" />
376: </td>
377: </tr>
378: </table>
379: <!-- End sub-table -->
380: </form>
381: ENDLOGIN
382: if ($fullgraph) {
383: $r->print(<<ENDDOCUMENT);
384: </td>
385:
386: <!-- Row 4 Column 2 -->
387: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
388:
389: <!-- Row 4 Column 4 -->
390: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
391: </tr>
392: <tr>
393:
394: <!-- Row 5 Column 1 -->
395: <td bgcolor="$sidebg" valign="middle" align="left">
396: <br />
397: <table border=0 cellspacing=0 cellpadding=0>
398: <tr>
399: <td bgcolor="$sidebg" align="left" valign="top">
400: <small><b> Domain: </b></small>
401: </td>
402: <td bgcolor="$sidebg" align="left" valign="top">
403: <small><tt> $domain</tt></small>
404: </td>
405: </tr>
406: <tr>
407: <td bgcolor="$sidebg" align="left" valign="top">
408: <small><b> Server: </b></small>
409: </td>
410: <td bgcolor="$sidebg" align="left" valign="top">
411: <small><tt> $lonhost ($role)</tt></small>
412: </td>
413: </tr>
414: <tr>
415: <td bgcolor="$sidebg" align="left" valign="top">
416: <small><b> Load: </b></small>
417: </td>
418: <td bgcolor="$sidebg" align="left" valign="top">
419: <small><tt> $loadpercent percent</tt></small>
420: </td>
421: </tr>
422: <tr>
423: <td bgcolor="$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>
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 />
436: <tt> $servadm<br /> </tt>
437: </small>
438: </td>
439:
440: <!-- Row 5 Column 2 -->
441: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
442:
443: <!-- Row 5 Column 3 -->
444: <td width="100%" valign="bottom" bgcolor="$mainbg">
445: $domainlogo
446: </td>
447:
448: <!-- Row 5 Column 4 -->
449: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
450: </tr>
451: <tr>
452:
453: <!-- Row 6 Column 1 -->
454: <td bgcolor="$sidebg"> </td>
455:
456: <!-- Row 6 Column 2 -->
457: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
458:
459: <!-- Row 6 Column 3 -->
460: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
461:
462: <!-- Row 6 Column 4 -->
463: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
464: </tr>
465: </table>
466:
467: <script>
468: // the if prevents the script error if the browser can't handle this
469: if ( document.client.uname ) { document.client.uname.focus(); }
470: </script>
471:
472: ENDDOCUMENT
473: }
474: $r->print('</body></html>');
475: return OK;
476: }
477:
478: 1;
479: __END__
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