1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.26 2002/10/29 20:57:31 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'},['interface']);
54:
55: $ENV{'form.interface'}=~s/\W//g;
56:
57: my $fullgraph=($ENV{'form.interface'} ne 'textual');
58:
59: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':8080'.
60: $r->dir_config('lonIconsURL');
61: my $domain = $r->dir_config('lonDefDomain');
62: my $role = $r->dir_config('lonRole');
63: my $loadlim = $r->dir_config('lonLoadLim');
64: my $servadm = $r->dir_config('lonAdmEMail');
65: my $sysadm = $r->dir_config('lonSysEMail');
66: my $lonhost = $r->dir_config('lonHostID');
67: my $tabdir = $r->dir_config('lonTabDir');
68: my $include = $r->dir_config('lonIncludes');
69:
70: my $loadavg;
71: {
72: my $loadfile=Apache::File->new('/proc/loadavg');
73: $loadavg=<$loadfile>;
74: }
75: $loadavg =~ s/\s.*//g;
76: my $loadpercent=100*$loadavg/$loadlim;
77:
78: my $otherserver='http://'.$ENV{'SERVER_NAME'};
79: my $firsturl=$ENV{'request.firsturl'};
80: # ---------------------------------------- Are we access server and overloaded?
81: if (($role eq 'access') && ($loadpercent>100.0)) {
82: $otherserver=Apache::lonnet::spareserver($loadpercent);
83: }
84:
85: # -------------------------------------------------------- Set login parameters
86:
87: my @hexstr=('0','1','2','3','4','5','6','7',
88: '8','9','a','b','c','d','e','f');
89: my $lkey='';
90: for (0..7) {
91: $lkey.=$hexstr[rand(15)];
92: }
93:
94: my $ukey='';
95: for (0..7) {
96: $ukey.=$hexstr[rand(15)];
97: }
98:
99: my $lextkey=hex($lkey);
100: if ($lextkey>2147483647) { $lextkey-=4294967296; }
101:
102: my $uextkey=hex($ukey);
103: if ($uextkey>2147483647) { $uextkey-=4294967296; }
104:
105: my $logtoken=Apache::lonnet::reply(
106: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
107: $lonhost);
108: my $domainlogo=&Apache::loncommon::domainlogo();
109: # --------------------------------------------------- Print login screen header
110: $r->print(<<ENDHEADER);
111: <html>
112: <head>
113: <title>The LearningOnline Network with CAPA Login</title>
114: </head>
115: ENDHEADER
116: # ---------------------------------------------------- Serve out DES JavaScript
117: {
118: my $jsh=Apache::File->new($include."/londes.js");
119: $r->print(<$jsh>);
120: }
121:
122: # ----------------------------------------------------------- Front page design
123: my $pgbg=&Apache::loncommon::designparm('login.pgbg');
124: my $font=&Apache::loncommon::designparm('login.font');
125: my $link=&Apache::loncommon::designparm('login.link');
126: my $vlink=&Apache::loncommon::designparm('login.vlink');
127: my $alink=&Apache::loncommon::designparm('login.alink');
128: my $mainbg=&Apache::loncommon::designparm('login.mainbg');
129: my $sidebg=&Apache::loncommon::designparm('login.sidebg');
130: my $logo=&Apache::loncommon::designparm('login.logo');
131: my $img=&Apache::loncommon::designparm('login.img');
132:
133:
134: # ---------------------------------------------------------- Serve rest of page
135: $r->print(<<ENDSCRIPT);
136:
137: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
138: onLoad="init();" topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
139:
140: <script language="JavaScript">
141: function send()
142: {
143: this.document.server.elements.uname.value
144: =this.document.client.elements.uname.value;
145:
146: this.document.server.elements.udom.value
147: =this.document.client.elements.udom.value;
148:
149: uextkey=this.document.client.elements.uextkey.value;
150: lextkey=this.document.client.elements.lextkey.value;
151: initkeys();
152:
153: this.document.server.elements.upass.value
154: =crypted(this.document.client.elements.upass.value);
155:
156: this.document.server.submit();
157: return false;
158: }
159: </script>
160: ENDSCRIPT
161:
162: if ($fullgraph) {
163: $r->print(
164: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
165: }
166:
167: $r->print(<<ENDSERVERFORM);
168: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
169: <input type=hidden name=logtoken value="$logtoken">
170: <input type=hidden name=serverid value="$lonhost">
171: <input type=hidden name=interface value="$ENV{'form.interface'}">
172: <input type=hidden name=uname value="">
173: <input type=hidden name=upass value="">
174: <input type=hidden name=udom value="">
175: </form>
176: ENDSERVERFORM
177: if ($fullgraph) { $r->print(<<ENDTOP);
178: <!-- The LON-CAPA Header -->
179: <tr>
180:
181: <!-- Row 1 Columns 2-4 -->
182: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="#006600"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
183: </tr>
184:
185: <!-- The gray bar that starts the two table frames -->
186: <tr>
187:
188: <!-- Row 2 Column 1 -->
189: <td width=182 height=27 bgcolor="$sidebg"> </td>
190:
191: <!-- Row 2 Column 2 -->
192: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
193:
194: <!-- Row 2 Column 3 -->
195: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
196:
197: <!-- Row 2 Column 4 -->
198: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
199: </tr>
200: <tr>
201:
202: <!-- A cell that will hold the 'access' and 'about' buttons -->
203: <!-- Row 3 Column 1 -->
204: <td valign="top" height=60 align="center" bgcolor="$sidebg">
205: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
206: <br />
207: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
208: </td>
209:
210: <!-- The shaded space between the two main columns -->
211: <!-- Row 3 Column 2 -->
212: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
213:
214: <!-- The right main column holding the large LON-CAPA logo-->
215: <!-- Rows 3-4 Column 3 -->
216: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
217: <center>
218: <img src="$logo" alt="" />
219: </center>
220: </td>
221:
222: <!-- Row 3 Column 4 -->
223: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
224: </tr>
225: <tr>
226:
227: <!-- The entry form -->
228: <!-- Row 4 Column 1 -->
229: <td align="center" valign="middle" bgcolor="$sidebg">
230: ENDTOP
231: }
232: $r->print(<<ENDLOGIN);
233: <form name="client" onsubmit="return(send())">
234: <input type="hidden" name="lextkey" value="$lextkey">
235: <input type="hidden" name="uextkey" value="$uextkey">
236:
237: <!-- Start the sub-table for text and input alignment -->
238: <table border=0 cellspacing=0 cellpadding=0>
239: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
240: <tr>
241: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
242: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" /></td>
243: </tr>
244: <tr>
245: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
246: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
247: </tr>
248: <tr>
249: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
250: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value=$domain /></td>
251: </tr>
252: <tr>
253: <td bgcolor="$mainbg" valign="bottom" align="center" colspan=2>
254: <br />
255: <input type="submit" value="Log In" />
256: </td>
257: </tr>
258: </table>
259: <!-- End sub-table -->
260: </form>
261: ENDLOGIN
262: if ($fullgraph) {
263: $r->print(<<ENDDOCUMENT);
264: </td>
265:
266: <!-- Row 4 Column 2 -->
267: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
268:
269: <!-- Row 4 Column 4 -->
270: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
271: </tr>
272: <tr>
273:
274: <!-- Row 5 Column 1 -->
275: <td bgcolor="$sidebg" valign="middle" align="left">
276: <br />
277: <table border=0 cellspacing=0 cellpadding=0>
278: <tr>
279: <td bgcolor="$sidebg" align="left" valign="top">
280: <small><b> Domain: </b></small>
281: </td>
282: <td bgcolor="$sidebg" align="left" valign="top">
283: <small><tt> $domain</tt></small>
284: </td>
285: </tr>
286: <tr>
287: <td bgcolor="$sidebg" align="left" valign="top">
288: <small><b> Server: </b></small>
289: </td>
290: <td bgcolor="$sidebg" align="left" valign="top">
291: <small><tt> $lonhost ($role)</tt></small>
292: </td>
293: </tr>
294: <tr>
295: <td bgcolor="$sidebg" align="left" valign="top">
296: <small><b> Load: </b></small>
297: </td>
298: <td bgcolor="$sidebg" align="left" valign="top">
299: <small><tt> $loadpercent percent</tt></small>
300: </td>
301: </tr>
302: </table>
303: <br />
304: <small>
305: <b> System Administration:</b><br />
306: <tt> $sysadm</tt><br />
307: <b> Server Administration:</b><br />
308: <tt> $servadm<br /> </tt>
309: </small>
310: </td>
311:
312: <!-- Row 5 Column 2 -->
313: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
314:
315: <!-- Row 5 Column 3 -->
316: <td width="100%" valign="bottom" bgcolor="$mainbg">
317: $domainlogo
318: </td>
319:
320: <!-- Row 5 Column 4 -->
321: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
322: </tr>
323: <tr>
324:
325: <!-- Row 6 Column 1 -->
326: <td bgcolor="$sidebg"> </td>
327:
328: <!-- Row 6 Column 2 -->
329: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
330:
331: <!-- Row 6 Column 3 -->
332: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
333:
334: <!-- Row 6 Column 4 -->
335: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
336: </tr>
337: </table>
338:
339: <script>
340: // the if prevents the script error if the browser can't handle this
341: if ( document.client.uname ) { document.client.uname.focus(); }
342: </script>
343:
344: ENDDOCUMENT
345: }
346: $r->print('</body></html>');
347: return OK;
348: }
349:
350: 1;
351: __END__
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