File:
[LON-CAPA] /
loncom /
auth /
lonlogin.pm
Revision
1.25:
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Mon Oct 14 16:14:58 2002 UTC (21 years, 7 months ago) by
bowersj2
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MAIN
CVS tags:
HEAD
Fixing a pet peeve: When you go to the login screen, the focus will now
be automatically sent to the username box, if the browser supports it. The
"if" statement should prevent any script errors. I was worried Netscape 4
wouldn't work, but lo, it does. Not tested in IE but I see no reason this won't
work.
This means you can now login in with the keyboard sequence
"usernameTABpasswordENTER", which can't be optimized any more.
It's the little things... and commit messages five times the size of the
code committed... that make all the difference.
1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.25 2002/10/14 16:14:58 bowersj2 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']);
54:
55: $ENV{'form.interface'}=~s/\W//g;
56:
57: my $fullgraph=($ENV{'form.interface'} ne 'textual');
58:
59: my $iconpath= $r->dir_config('lonIconsURL');
60: my $domain = $r->dir_config('lonDefDomain');
61: my $role = $r->dir_config('lonRole');
62: my $loadlim = $r->dir_config('lonLoadLim');
63: my $servadm = $r->dir_config('lonAdmEMail');
64: my $sysadm = $r->dir_config('lonSysEMail');
65: my $lonhost = $r->dir_config('lonHostID');
66: my $tabdir = $r->dir_config('lonTabDir');
67: my $include = $r->dir_config('lonIncludes');
68:
69: my $loadavg;
70: {
71: my $loadfile=Apache::File->new('/proc/loadavg');
72: $loadavg=<$loadfile>;
73: }
74: $loadavg =~ s/\s.*//g;
75: my $loadpercent=100*$loadavg/$loadlim;
76:
77: my $otherserver='http://'.$ENV{'SERVER_NAME'};
78: my $firsturl=$ENV{'request.firsturl'};
79: # ---------------------------------------- Are we access server and overloaded?
80: if (($role eq 'access') && ($loadpercent>100.0)) {
81: $otherserver=Apache::lonnet::spareserver($loadpercent);
82: }
83:
84: # -------------------------------------------------------- Set login parameters
85:
86: my @hexstr=('0','1','2','3','4','5','6','7',
87: '8','9','a','b','c','d','e','f');
88: my $lkey='';
89: for (0..7) {
90: $lkey.=$hexstr[rand(15)];
91: }
92:
93: my $ukey='';
94: for (0..7) {
95: $ukey.=$hexstr[rand(15)];
96: }
97:
98: my $lextkey=hex($lkey);
99: if ($lextkey>2147483647) { $lextkey-=4294967296; }
100:
101: my $uextkey=hex($ukey);
102: if ($uextkey>2147483647) { $uextkey-=4294967296; }
103:
104: my $logtoken=Apache::lonnet::reply(
105: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
106: $lonhost);
107: my $domainlogo=&Apache::loncommon::domainlogo();
108: # --------------------------------------------------- Print login screen header
109: $r->print(<<ENDHEADER);
110: <html>
111: <head>
112: <title>The LearningOnline Network with CAPA Login</title>
113: </head>
114: ENDHEADER
115: # ---------------------------------------------------- Serve out DES JavaScript
116: {
117: my $jsh=Apache::File->new($include."/londes.js");
118: $r->print(<$jsh>);
119: }
120:
121: # ----------------------------------------------------------- Front page design
122: my $pgbg=&Apache::loncommon::designparm('login.pgbg');
123: my $font=&Apache::loncommon::designparm('login.font');
124: my $link=&Apache::loncommon::designparm('login.link');
125: my $vlink=&Apache::loncommon::designparm('login.vlink');
126: my $alink=&Apache::loncommon::designparm('login.alink');
127: my $mainbg=&Apache::loncommon::designparm('login.mainbg');
128: my $sidebg=&Apache::loncommon::designparm('login.sidebg');
129: my $logo=&Apache::loncommon::designparm('login.logo');
130: my $img=&Apache::loncommon::designparm('login.img');
131:
132:
133: # ---------------------------------------------------------- Serve rest of page
134: $r->print(<<ENDSCRIPT);
135:
136: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
137: onLoad="init();" topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
138:
139: <script language="JavaScript">
140: function send()
141: {
142: this.document.server.elements.uname.value
143: =this.document.client.elements.uname.value;
144:
145: this.document.server.elements.udom.value
146: =this.document.client.elements.udom.value;
147:
148: uextkey=this.document.client.elements.uextkey.value;
149: lextkey=this.document.client.elements.lextkey.value;
150: initkeys();
151:
152: this.document.server.elements.upass.value
153: =crypted(this.document.client.elements.upass.value);
154:
155: this.document.server.submit();
156: return false;
157: }
158: </script>
159: ENDSCRIPT
160:
161: if ($fullgraph) {
162: $r->print(
163: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
164: }
165:
166: $r->print(<<ENDSERVERFORM);
167: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
168: <input type=hidden name=logtoken value="$logtoken">
169: <input type=hidden name=serverid value="$lonhost">
170: <input type=hidden name=interface value="$ENV{'form.interface'}">
171: <input type=hidden name=uname value="">
172: <input type=hidden name=upass value="">
173: <input type=hidden name=udom value="">
174: </form>
175: ENDSERVERFORM
176: if ($fullgraph) { $r->print(<<ENDTOP);
177: <!-- The LON-CAPA Header -->
178: <tr>
179:
180: <!-- Row 1 Columns 2-4 -->
181: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="#006600"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
182: </tr>
183:
184: <!-- The gray bar that starts the two table frames -->
185: <tr>
186:
187: <!-- Row 2 Column 1 -->
188: <td width=182 height=27 bgcolor="$sidebg"> </td>
189:
190: <!-- Row 2 Column 2 -->
191: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
192:
193: <!-- Row 2 Column 3 -->
194: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
195:
196: <!-- Row 2 Column 4 -->
197: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
198: </tr>
199: <tr>
200:
201: <!-- A cell that will hold the 'access' and 'about' buttons -->
202: <!-- Row 3 Column 1 -->
203: <td valign="top" height=60 align="center" bgcolor="$sidebg">
204: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
205: <br />
206: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
207: </td>
208:
209: <!-- The shaded space between the two main columns -->
210: <!-- Row 3 Column 2 -->
211: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
212:
213: <!-- The right main column holding the large LON-CAPA logo-->
214: <!-- Rows 3-4 Column 3 -->
215: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
216: <center>
217: <img src="$logo" alt="" />
218: </center>
219: </td>
220:
221: <!-- Row 3 Column 4 -->
222: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
223: </tr>
224: <tr>
225:
226: <!-- The entry form -->
227: <!-- Row 4 Column 1 -->
228: <td align="center" valign="middle" bgcolor="$sidebg">
229: ENDTOP
230: }
231: $r->print(<<ENDLOGIN);
232: <form name="client" onsubmit="return(send())">
233: <input type="hidden" name="lextkey" value="$lextkey">
234: <input type="hidden" name="uextkey" value="$uextkey">
235:
236: <!-- Start the sub-table for text and input alignment -->
237: <table border=0 cellspacing=0 cellpadding=0>
238: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
239: <tr>
240: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
241: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" /></td>
242: </tr>
243: <tr>
244: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
245: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
246: </tr>
247: <tr>
248: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
249: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value=$domain /></td>
250: </tr>
251: <tr>
252: <td bgcolor="$mainbg" valign="bottom" align="center" colspan=2>
253: <br />
254: <input type="submit" value="Log In" />
255: </td>
256: </tr>
257: </table>
258: <!-- End sub-table -->
259: </form>
260: ENDLOGIN
261: if ($fullgraph) {
262: $r->print(<<ENDDOCUMENT);
263: </td>
264:
265: <!-- Row 4 Column 2 -->
266: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
267:
268: <!-- Row 4 Column 4 -->
269: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
270: </tr>
271: <tr>
272:
273: <!-- Row 5 Column 1 -->
274: <td bgcolor="$sidebg" valign="middle" align="left">
275: <br />
276: <table border=0 cellspacing=0 cellpadding=0>
277: <tr>
278: <td bgcolor="$sidebg" align="left" valign="top">
279: <small><b> Domain: </b></small>
280: </td>
281: <td bgcolor="$sidebg" align="left" valign="top">
282: <small><tt> $domain</tt></small>
283: </td>
284: </tr>
285: <tr>
286: <td bgcolor="$sidebg" align="left" valign="top">
287: <small><b> Server: </b></small>
288: </td>
289: <td bgcolor="$sidebg" align="left" valign="top">
290: <small><tt> $lonhost ($role)</tt></small>
291: </td>
292: </tr>
293: <tr>
294: <td bgcolor="$sidebg" align="left" valign="top">
295: <small><b> Load: </b></small>
296: </td>
297: <td bgcolor="$sidebg" align="left" valign="top">
298: <small><tt> $loadpercent percent</tt></small>
299: </td>
300: </tr>
301: </table>
302: <br />
303: <small>
304: <b> System Administration:</b><br />
305: <tt> $sysadm</tt><br />
306: <b> Server Administration:</b><br />
307: <tt> $servadm<br /> </tt>
308: </small>
309: </td>
310:
311: <!-- Row 5 Column 2 -->
312: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
313:
314: <!-- Row 5 Column 3 -->
315: <td width="100%" valign="bottom" bgcolor="$mainbg">
316: $domainlogo
317: </td>
318:
319: <!-- Row 5 Column 4 -->
320: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
321: </tr>
322: <tr>
323:
324: <!-- Row 6 Column 1 -->
325: <td bgcolor="$sidebg"> </td>
326:
327: <!-- Row 6 Column 2 -->
328: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
329:
330: <!-- Row 6 Column 3 -->
331: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
332:
333: <!-- Row 6 Column 4 -->
334: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
335: </tr>
336: </table>
337:
338: <script>
339: // the if prevents the script error if the browser can't handle this
340: if ( document.client.uname ) { document.client.uname.focus(); }
341: </script>
342:
343: ENDDOCUMENT
344: }
345: $r->print('</body></html>');
346: return OK;
347: }
348:
349: 1;
350: __END__
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