Annotation of loncom/auth/lonlogin.pm, revision 1.41
1.1 albertel 1: # The LearningOnline Network
2: # Login Screen
1.11 www 3: #
1.41 ! albertel 4: # $Id: lonlogin.pm,v 1.40 2003/04/03 21:53:51 albertel 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'},
54: ['interface','username','domain','firsturl']);
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');
1.1 albertel 84:
1.30 www 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
1.1 albertel 91: my $loadavg;
1.41 ! albertel 92: {
! 93: my $loadfile=Apache::File->new('/proc/loadavg');
! 94: $loadavg=<$loadfile>;
! 95: }
1.1 albertel 96: $loadavg =~ s/\s.*//g;
97: my $loadpercent=100*$loadavg/$loadlim;
1.41 ! albertel 98: my $userloadpercent=&Apache::lonnet::userload();
1.1 albertel 99:
1.30 www 100: # ------------------------------------------------------- Do the load balancing
1.10 www 101: my $otherserver='http://'.$ENV{'SERVER_NAME'};
1.31 www 102: my $firsturl=
103: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'});
1.1 albertel 104: # ---------------------------------------- Are we access server and overloaded?
1.41 ! albertel 105: if (($role eq 'access') &&
! 106: (($userloadpercent>100.0)||($loadpercent>100.0))) {
! 107: $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
1.1 albertel 108: }
1.6 www 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);
1.15 www 125: if ($lextkey>2147483647) { $lextkey-=4294967296; }
126:
1.6 www 127: my $uextkey=hex($ukey);
1.15 www 128: if ($uextkey>2147483647) { $uextkey-=4294967296; }
129:
1.31 www 130: # -------------------------------------------------------- Store away log token
1.6 www 131: my $logtoken=Apache::lonnet::reply(
1.7 www 132: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
1.6 www 133: $lonhost);
1.31 www 134:
135: # ------------------- If we cannot talk to ourselves, we are in serious trouble
136:
137: if ($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:
1.20 www 165: my $domainlogo=&Apache::loncommon::domainlogo();
1.38 www 166: $servadm=~s/\,/\<br \/\>/g;
167: $sysadm=~s/\,/\<br \/\>/g;
168:
1.6 www 169: # --------------------------------------------------- Print login screen header
170: $r->print(<<ENDHEADER);
1.1 albertel 171: <html>
172: <head>
1.37 www 173: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />
1.2 www 174: <title>The LearningOnline Network with CAPA Login</title>
1.1 albertel 175: </head>
1.6 www 176: ENDHEADER
177: # ---------------------------------------------------- Serve out DES JavaScript
178: {
179: my $jsh=Apache::File->new($include."/londes.js");
180: $r->print(<$jsh>);
181: }
1.21 www 182:
183: # ----------------------------------------------------------- Front page design
1.35 www 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');
1.21 www 192: my $alink=&Apache::loncommon::designparm('login.alink');
1.35 www 193: my $mainbg=
194: ($fullgraph?&Apache::loncommon::designparm('login.mainbg'):'#FFFFFF');
195: my $sidebg=
196: ($fullgraph?&Apache::loncommon::designparm('login.sidebg'):'#FFFFFF');
1.21 www 197: my $logo=&Apache::loncommon::designparm('login.logo');
198: my $img=&Apache::loncommon::designparm('login.img');
199:
200:
1.6 www 201: # ---------------------------------------------------------- Serve rest of page
1.16 www 202: $r->print(<<ENDSCRIPT);
1.6 www 203:
1.21 www 204: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
1.27 albertel 205: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
1.6 www 206:
1.14 albertel 207: <script language="JavaScript">
208: function send()
209: {
1.6 www 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:
1.33 www 216: this.document.server.elements.imagesuppress.value
1.36 www 217: =this.document.client.elements.imagesuppress.checked;
1.33 www 218:
219: this.document.server.elements.embedsuppress.value
1.36 www 220: =this.document.client.elements.embedsuppress.checked;
1.33 www 221:
1.34 www 222: this.document.server.elements.appletsuppress.value
1.36 www 223: =this.document.client.elements.appletsuppress.checked;
1.34 www 224:
1.33 www 225: this.document.server.elements.fontenhance.value
1.36 www 226: =this.document.client.elements.fontenhance.checked;
1.33 www 227:
228: this.document.server.elements.blackwhite.value
1.36 www 229: =this.document.client.elements.blackwhite.checked;
1.33 www 230:
1.35 www 231: this.document.server.elements.remember.value
1.36 www 232: =this.document.client.elements.remember.checked;
1.35 www 233:
1.6 www 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();
1.19 bowersj2 242: return false;
1.6 www 243: }
1.14 albertel 244: </script>
1.16 www 245: ENDSCRIPT
1.6 www 246:
1.16 www 247: if ($fullgraph) {
248: $r->print(
249: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
250: }
1.6 www 251:
1.16 www 252: $r->print(<<ENDSERVERFORM);
1.14 albertel 253: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
1.33 www 254: <input type="hidden" name="logtoken" value="$logtoken" />
255: <input type="hidden" name="serverid" value="$lonhost" />
256: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
257: <input type="hidden" name="uname" value="" />
258: <input type="hidden" name="upass" value="" />
259: <input type="hidden" name="udom" value="" />
260: <input type="hidden" name="imagesuppress" value="" />
1.34 www 261: <input type="hidden" name="appletsuppress" value="" />
1.33 www 262: <input type="hidden" name="embedsuppress" value="" />
263: <input type="hidden" name="fontenhance" value="" />
264: <input type="hidden" name="blackwhite" value="" />
1.35 www 265: <input type="hidden" name="remember" value="" />
1.14 albertel 266: </form>
1.16 www 267: ENDSERVERFORM
268: if ($fullgraph) { $r->print(<<ENDTOP);
1.14 albertel 269: <!-- The LON-CAPA Header -->
270: <tr>
271:
272: <!-- Row 1 Columns 2-4 -->
1.29 www 273: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
1.14 albertel 274: </tr>
275:
276: <!-- The gray bar that starts the two table frames -->
277: <tr>
278:
279: <!-- Row 2 Column 1 -->
1.21 www 280: <td width=182 height=27 bgcolor="$sidebg"> </td>
1.14 albertel 281:
282: <!-- Row 2 Column 2 -->
1.19 bowersj2 283: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
1.14 albertel 284:
285: <!-- Row 2 Column 3 -->
1.19 bowersj2 286: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
1.14 albertel 287:
288: <!-- Row 2 Column 4 -->
1.19 bowersj2 289: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
1.14 albertel 290: </tr>
291: <tr>
292:
293: <!-- A cell that will hold the 'access' and 'about' buttons -->
294: <!-- Row 3 Column 1 -->
1.21 www 295: <td valign="top" height=60 align="center" bgcolor="$sidebg">
1.19 bowersj2 296: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
1.14 albertel 297: <br />
1.19 bowersj2 298: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
1.14 albertel 299: </td>
300:
301: <!-- The shaded space between the two main columns -->
302: <!-- Row 3 Column 2 -->
1.19 bowersj2 303: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 304:
305: <!-- The right main column holding the large LON-CAPA logo-->
306: <!-- Rows 3-4 Column 3 -->
1.21 www 307: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
1.14 albertel 308: <center>
1.21 www 309: <img src="$logo" alt="" />
1.14 albertel 310: </center>
311: </td>
312:
313: <!-- Row 3 Column 4 -->
1.19 bowersj2 314: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 315: </tr>
316: <tr>
317:
318: <!-- The entry form -->
319: <!-- Row 4 Column 1 -->
1.21 www 320: <td align="center" valign="middle" bgcolor="$sidebg">
1.16 www 321: ENDTOP
1.32 www 322: } else {
1.35 www 323: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>');
1.33 www 324: }
325: $r->print('<form name="client" onsubmit="return(send())">');
326: unless ($fullgraph) {
327: $r->print(<<ENDACCESSOPTIONS);
1.35 www 328: <h3>Select Accessibility Options</h3>
1.33 www 329: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
1.34 www 330: <input type="checkbox" name="appletsuppress" /> Suppress Java applets<br />
1.33 www 331: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
332: <input type="checkbox" name="fontenhance" /> Increase font size<br />
1.35 www 333: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br />
334: <p>If you have accessibility needs that are not addressed by this interface,
335: please
336: contact the system administrator at <tt>$sysadm</tt>.</p><br />
337: <input type="checkbox" name="remember" /> Remember these settings for next login<hr />
1.33 www 338: ENDACCESSOPTIONS
339: } else {
340: $r->print(<<ENDNOOPT);
341: <input type="hidden" name="imagesuppress" value="" />
342: <input type="hidden" name="embedsuppress" value="" />
1.34 www 343: <input type="hidden" name="appletsuppress" value="" />
1.33 www 344: <input type="hidden" name="fontenhance" value="" />
345: <input type="hidden" name="blackwhite" value="" />
1.35 www 346: <input type="hidden" name="remember" value="" />
1.33 www 347: ENDNOOPT
1.16 www 348: }
349: $r->print(<<ENDLOGIN);
1.14 albertel 350: <input type="hidden" name="lextkey" value="$lextkey">
351: <input type="hidden" name="uextkey" value="$uextkey">
352:
353: <!-- Start the sub-table for text and input alignment -->
354: <table border=0 cellspacing=0 cellpadding=0>
1.21 www 355: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
1.14 albertel 356: <tr>
1.21 www 357: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
1.30 www 358: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
1.14 albertel 359: </tr>
360: <tr>
1.21 www 361: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
362: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
1.14 albertel 363: </tr>
364: <tr>
1.21 www 365: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
1.30 www 366: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
1.14 albertel 367: </tr>
368: <tr>
1.28 www 369: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
370: <td bgcolor="$mainbg" valign="bottom" align="center">
1.14 albertel 371: <br />
1.19 bowersj2 372: <input type="submit" value="Log In" />
1.14 albertel 373: </td>
374: </tr>
375: </table>
376: <!-- End sub-table -->
377: </form>
1.16 www 378: ENDLOGIN
379: if ($fullgraph) {
380: $r->print(<<ENDDOCUMENT);
1.14 albertel 381: </td>
382:
383: <!-- Row 4 Column 2 -->
1.19 bowersj2 384: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 385:
386: <!-- Row 4 Column 4 -->
1.19 bowersj2 387: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 388: </tr>
389: <tr>
390:
391: <!-- Row 5 Column 1 -->
1.21 www 392: <td bgcolor="$sidebg" valign="middle" align="left">
1.14 albertel 393: <br />
394: <table border=0 cellspacing=0 cellpadding=0>
395: <tr>
1.21 www 396: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 397: <small><b> Domain: </b></small>
398: </td>
1.21 www 399: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 400: <small><tt> $domain</tt></small>
401: </td>
402: </tr>
403: <tr>
1.21 www 404: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 405: <small><b> Server: </b></small>
406: </td>
1.21 www 407: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 408: <small><tt> $lonhost ($role)</tt></small>
409: </td>
410: </tr>
411: <tr>
1.21 www 412: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 413: <small><b> Load: </b></small>
414: </td>
1.21 www 415: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 416: <small><tt> $loadpercent percent</tt></small>
417: </td>
418: </tr>
419: </table>
420: <br />
421: <small>
422: <b> System Administration:</b><br />
423: <tt> $sysadm</tt><br />
424: <b> Server Administration:</b><br />
1.19 bowersj2 425: <tt> $servadm<br /> </tt>
1.14 albertel 426: </small>
427: </td>
428:
429: <!-- Row 5 Column 2 -->
1.19 bowersj2 430: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 431:
432: <!-- Row 5 Column 3 -->
1.21 www 433: <td width="100%" valign="bottom" bgcolor="$mainbg">
1.20 www 434: $domainlogo
435: </td>
1.14 albertel 436:
437: <!-- Row 5 Column 4 -->
1.19 bowersj2 438: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 439: </tr>
440: <tr>
441:
442: <!-- Row 6 Column 1 -->
1.21 www 443: <td bgcolor="$sidebg"> </td>
1.14 albertel 444:
445: <!-- Row 6 Column 2 -->
1.19 bowersj2 446: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
1.14 albertel 447:
448: <!-- Row 6 Column 3 -->
1.19 bowersj2 449: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
1.14 albertel 450:
451: <!-- Row 6 Column 4 -->
1.19 bowersj2 452: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
1.14 albertel 453: </tr>
1.1 albertel 454: </table>
1.25 bowersj2 455:
456: <script>
457: // the if prevents the script error if the browser can't handle this
458: if ( document.client.uname ) { document.client.uname.focus(); }
459: </script>
1.14 albertel 460:
1.1 albertel 461: ENDDOCUMENT
1.16 www 462: }
463: $r->print('</body></html>');
1.1 albertel 464: return OK;
465: }
466:
467: 1;
468: __END__
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