Annotation of nsdl/nsdlloncapaorg/lonlogin.pm, revision 1.2
1.1 www 1: # The LearningOnline Network
2: # Login Screen
3: #
1.2 ! www 4: # $Id: lonlogin.pm,v 1.1 2003/07/28 20:27:16 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))) {
107: $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
108: }
109:
110: # -------------------------------------------------------- Set login parameters
111:
112: my @hexstr=('0','1','2','3','4','5','6','7',
113: '8','9','a','b','c','d','e','f');
114: my $lkey='';
115: for (0..7) {
116: $lkey.=$hexstr[rand(15)];
117: }
118:
119: my $ukey='';
120: for (0..7) {
121: $ukey.=$hexstr[rand(15)];
122: }
123:
124: my $lextkey=hex($lkey);
125: if ($lextkey>2147483647) { $lextkey-=4294967296; }
126:
127: my $uextkey=hex($ukey);
128: if ($uextkey>2147483647) { $uextkey-=4294967296; }
129:
130: # -------------------------------------------------------- Store away log token
131: my $logtoken=Apache::lonnet::reply(
132: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
133: $lonhost);
134:
135: # ------------------- If we cannot talk to ourselves, we are in serious trouble
136:
137: if ($logtoken eq 'con_lost') {
138: my $spares='';
139: foreach (keys %Apache::lonnet::hostname) {
140: if ($_ ne $lonhost) {
141: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}.
142: '/adm/login?domain='.$authdomain.'">'.
143: $Apache::lonnet::hostname{$_}.'</a>';
144: if ($Apache::lonnet::spareid{$_}) {
145: $spares.=' (preferred)';
146: }
147: }
148: }
149: $r->print(<<ENDTROUBLE);
150: <html>
151: <head><title>The LearningOnline Network with CAPA</title></head>
152: <body bgcolor="#FFFFFF">
153: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />
154: <h3>This LON-CAPA server is temporarily not available for login</h3>
155: <p>Please attempt to login to one of the following servers:</p>$spares
156: <p>If the problem persists, please contact <tt>$servadm</tt>.</p>
157: </body>
158: </html>
159: ENDTROUBLE
160: return OK;
161: }
162:
163: # ----------------------------------------------- Apparently we are in business
164:
165: my $domainlogo=&Apache::loncommon::domainlogo();
166: $servadm=~s/\,/\<br \/\>/g;
167: $sysadm=~s/\,/\<br \/\>/g;
168:
169: # --------------------------------------------------- Print login screen header
170: $r->print(<<ENDHEADER);
171: <html>
172: <head>
173: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />
174: <title>The LearningOnline Network with CAPA Login</title>
175: </head>
176: ENDHEADER
177: # ---------------------------------------------------- Serve out DES JavaScript
178: {
179: my $jsh=Apache::File->new($include."/londes.js");
180: $r->print(<$jsh>);
181: }
182:
183: # ----------------------------------------------------------- Front page design
184: my $pgbg=
185: ($fullgraph?&Apache::loncommon::designparm('login.pgbg'):'#FFFFFF');
186: my $font=
187: ($fullgraph?&Apache::loncommon::designparm('login.font'):'#000000');
188: my $link=
189: ($fullgraph?&Apache::loncommon::designparm('login.link'):'#0000FF');
190: my $vlink=
191: ($fullgraph?&Apache::loncommon::designparm('login.vlink'):'#0000FF');
192: my $alink=&Apache::loncommon::designparm('login.alink');
193: my $mainbg=
194: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF');
195: my $sidebg=
196: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF');
197: my $logo=&Apache::loncommon::designparm('login.logo');
198: my $img=&Apache::loncommon::designparm('login.img');
199:
200:
201: # ---------------------------------------------------------- Serve rest of page
202: $r->print(<<ENDSCRIPT);
203:
204: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
205: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
206:
207: <script language="JavaScript">
208: function send()
209: {
210: this.document.server.elements.uname.value
211: =this.document.client.elements.uname.value;
212:
213: this.document.server.elements.udom.value
214: =this.document.client.elements.udom.value;
215:
216: this.document.server.elements.imagesuppress.value
217: =this.document.client.elements.imagesuppress.checked;
218:
219: this.document.server.elements.embedsuppress.value
220: =this.document.client.elements.embedsuppress.checked;
221:
222: this.document.server.elements.appletsuppress.value
223: =this.document.client.elements.appletsuppress.checked;
224:
225: this.document.server.elements.fontenhance.value
226: =this.document.client.elements.fontenhance.checked;
227:
228: this.document.server.elements.blackwhite.value
229: =this.document.client.elements.blackwhite.checked;
230:
231: this.document.server.elements.remember.value
232: =this.document.client.elements.remember.checked;
233:
234: uextkey=this.document.client.elements.uextkey.value;
235: lextkey=this.document.client.elements.lextkey.value;
236: initkeys();
237:
238: this.document.server.elements.upass.value
239: =crypted(this.document.client.elements.upass.value);
240:
241: this.document.server.submit();
242: return false;
243: }
244: </script>
245: ENDSCRIPT
246:
247: if ($fullgraph) {
248: $r->print(
249: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
250: }
251:
252: $r->print(<<ENDSERVERFORM);
253: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
254: <input type="hidden" name="logtoken" value="$logtoken" />
255: <input type="hidden" name="serverid" value="$lonhost" />
256: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
257: <input type="hidden" name="uname" value="" />
258: <input type="hidden" name="upass" value="" />
259: <input type="hidden" name="udom" value="" />
260: <input type="hidden" name="imagesuppress" value="" />
261: <input type="hidden" name="appletsuppress" value="" />
262: <input type="hidden" name="embedsuppress" value="" />
263: <input type="hidden" name="fontenhance" value="" />
264: <input type="hidden" name="blackwhite" value="" />
265: <input type="hidden" name="remember" value="" />
266: <input type="hidden" name="localpath" value="$ENV{'form.localpath'}" />
267: <input type="hidden" name="localres" value="$ENV{'form.localres'}" />
268: </form>
269: ENDSERVERFORM
270: if ($fullgraph) { $r->print(<<ENDTOP);
271: <!-- The LON-CAPA Header -->
272: <tr>
273:
274: <!-- Row 1 Columns 2-4 -->
1.2 ! www 275: <td width="100%" colspan=4 bgcolor="$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 276: </tr>
277:
278: <!-- The gray bar that starts the two table frames -->
279: <tr>
280:
281: <!-- Row 2 Column 1 -->
282: <td width=182 height=27 bgcolor="$sidebg"> </td>
283:
284: <!-- Row 2 Column 2 -->
285: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
286:
287: <!-- Row 2 Column 3 -->
288: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
289:
290: <!-- Row 2 Column 4 -->
291: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
292: </tr>
293: <tr>
294:
295: <!-- A cell that will hold the 'access' and 'about' buttons -->
296: <!-- Row 3 Column 1 -->
297: <td valign="top" height=60 align="center" bgcolor="$sidebg">
298: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
299: <br />
300: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
301: </td>
302:
303: <!-- The shaded space between the two main columns -->
304: <!-- Row 3 Column 2 -->
305: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
306:
307: <!-- The right main column holding the large LON-CAPA logo-->
308: <!-- Rows 3-4 Column 3 -->
309: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
310: <center>
311: <img src="$logo" alt="" />
312: </center>
313: </td>
314:
315: <!-- Row 3 Column 4 -->
316: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
317: </tr>
318: <tr>
319:
320: <!-- The entry form -->
321: <!-- Row 4 Column 1 -->
322: <td align="center" valign="middle" bgcolor="$sidebg">
323: ENDTOP
324: } else {
325: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>');
326: }
327: $r->print('<form name="client" onsubmit="return(send())">');
328: unless ($fullgraph) {
329: $r->print(<<ENDACCESSOPTIONS);
330: <h3>Select Accessibility Options</h3>
331: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
332: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br />
333: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
334: <input type="checkbox" name="fontenhance" /> Increase font size<br />
335: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br />
336: <p>If you have accessibility needs that are not addressed by this interface,
337: please
338: contact the system administrator at <tt>$sysadm</tt>.</p><br />
339: <input type="checkbox" name="remember" /> Remember these settings for next login<hr />
340: ENDACCESSOPTIONS
341: } else {
342: $r->print(<<ENDNOOPT);
343: <input type="hidden" name="imagesuppress" value="" />
344: <input type="hidden" name="embedsuppress" value="" />
345: <input type="hidden" name="appletsuppress" value="" />
346: <input type="hidden" name="fontenhance" value="" />
347: <input type="hidden" name="blackwhite" value="" />
348: <input type="hidden" name="remember" value="" />
349: ENDNOOPT
350: }
351: $r->print(<<ENDLOGIN);
352: <input type="hidden" name="lextkey" value="$lextkey">
353: <input type="hidden" name="uextkey" value="$uextkey">
354:
355: <!-- Start the sub-table for text and input alignment -->
356: <table border=0 cellspacing=0 cellpadding=0>
357: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
358: <tr>
359: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
360: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
361: </tr>
362: <tr>
363: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
364: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
365: </tr>
366: <tr>
367: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
368: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
369: </tr>
370: <tr>
371: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
372: <td bgcolor="$mainbg" valign="bottom" align="center">
373: <br />
374: <input type="submit" value="Log In" />
375: </td>
376: </tr>
377: </table>
378: <!-- End sub-table -->
379: </form>
380: ENDLOGIN
381: if ($fullgraph) {
382: $r->print(<<ENDDOCUMENT);
383: </td>
384:
385: <!-- Row 4 Column 2 -->
386: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
387:
388: <!-- Row 4 Column 4 -->
389: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
390: </tr>
391: <tr>
392:
393: <!-- Row 5 Column 1 -->
394: <td bgcolor="$sidebg" valign="middle" align="left">
395: <br />
396: <table border=0 cellspacing=0 cellpadding=0>
397: <tr>
398: <td bgcolor="$sidebg" align="left" valign="top">
399: <small><b> Domain: </b></small>
400: </td>
401: <td bgcolor="$sidebg" align="left" valign="top">
402: <small><tt> $domain</tt></small>
403: </td>
404: </tr>
405: <tr>
406: <td bgcolor="$sidebg" align="left" valign="top">
407: <small><b> Server: </b></small>
408: </td>
409: <td bgcolor="$sidebg" align="left" valign="top">
410: <small><tt> $lonhost ($role)</tt></small>
411: </td>
412: </tr>
413: <tr>
414: <td bgcolor="$sidebg" align="left" valign="top">
415: <small><b> Load: </b></small>
416: </td>
417: <td bgcolor="$sidebg" align="left" valign="top">
418: <small><tt> $loadpercent percent</tt></small>
419: </td>
420: </tr>
421: <tr>
422: <td bgcolor="$sidebg" align="left" valign="top">
423: <small><b> User Load: </b></small>
424: </td>
425: <td bgcolor="$sidebg" align="left" valign="top">
426: <small><tt> $userloadpercent percent</tt></small>
427: </td>
428: </tr>
429: </table>
430: <br />
431: <small>
432: <b> System Administration:</b><br />
433: <tt> $sysadm</tt><br />
434: <b> Server Administration:</b><br />
435: <tt> $servadm<br /> </tt>
436: </small>
437: </td>
438:
439: <!-- Row 5 Column 2 -->
440: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
441:
442: <!-- Row 5 Column 3 -->
443: <td width="100%" valign="bottom" bgcolor="$mainbg">
444: $domainlogo
445: </td>
446:
447: <!-- Row 5 Column 4 -->
448: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
449: </tr>
450: <tr>
451:
452: <!-- Row 6 Column 1 -->
453: <td bgcolor="$sidebg"> </td>
454:
455: <!-- Row 6 Column 2 -->
456: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
457:
458: <!-- Row 6 Column 3 -->
459: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
460:
461: <!-- Row 6 Column 4 -->
462: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
463: </tr>
464: </table>
465:
466: <script>
467: // the if prevents the script error if the browser can't handle this
468: if ( document.client.uname ) { document.client.uname.focus(); }
469: </script>
470:
471: ENDDOCUMENT
472: }
473: $r->print('</body></html>');
474: return OK;
475: }
476:
477: 1;
478: __END__
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