Annotation of loncom/auth/lonlogin.pm, revision 1.33
1.1 albertel 1: # The LearningOnline Network
2: # Login Screen
1.11 www 3: #
1.33 ! www 4: # $Id: lonlogin.pm,v 1.32 2003/02/17 23:25:59 www 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 $r->header_only;
50:
1.16 www 51:
52: &Apache::loncommon::get_unprocessed_cgi
1.31 www 53: ($ENV{'QUERY_STRING'},['interface','username','domain','firsturl']);
1.18 www 54:
1.32 www 55: # ----------------------------------------------------------- Process Interface
1.18 www 56: $ENV{'form.interface'}=~s/\W//g;
1.16 www 57:
1.32 www 58: my $textbrowsers=$r->dir_config('lonTextBrowsers');
59: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
60:
61: foreach (split(/\:/,$textbrowsers)) {
62: if ($httpbrowser=~/$_/i) {
63: $ENV{'form.interface'}='textual';
64: }
65: }
66:
1.16 www 67: my $fullgraph=($ENV{'form.interface'} ne 'textual');
68:
1.26 www 69: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':8080'.
70: $r->dir_config('lonIconsURL');
1.1 albertel 71: my $domain = $r->dir_config('lonDefDomain');
72: my $role = $r->dir_config('lonRole');
73: my $loadlim = $r->dir_config('lonLoadLim');
74: my $servadm = $r->dir_config('lonAdmEMail');
75: my $sysadm = $r->dir_config('lonSysEMail');
76: my $lonhost = $r->dir_config('lonHostID');
77: my $tabdir = $r->dir_config('lonTabDir');
1.6 www 78: my $include = $r->dir_config('lonIncludes');
1.1 albertel 79:
1.30 www 80: # --------------------------------------------- Default values for login fields
81:
82: my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:'');
83: my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain);
84:
85: # ---------------------------------------------------------- Determine own load
1.1 albertel 86: my $loadavg;
87: {
88: my $loadfile=Apache::File->new('/proc/loadavg');
89: $loadavg=<$loadfile>;
90: }
91: $loadavg =~ s/\s.*//g;
92: my $loadpercent=100*$loadavg/$loadlim;
93:
1.30 www 94: # ------------------------------------------------------- Do the load balancing
1.10 www 95: my $otherserver='http://'.$ENV{'SERVER_NAME'};
1.31 www 96: my $firsturl=
97: ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'});
1.1 albertel 98: # ---------------------------------------- Are we access server and overloaded?
1.24 matthew 99: if (($role eq 'access') && ($loadpercent>100.0)) {
1.22 matthew 100: $otherserver=Apache::lonnet::spareserver($loadpercent);
1.1 albertel 101: }
1.6 www 102:
103: # -------------------------------------------------------- Set login parameters
104:
105: my @hexstr=('0','1','2','3','4','5','6','7',
106: '8','9','a','b','c','d','e','f');
107: my $lkey='';
108: for (0..7) {
109: $lkey.=$hexstr[rand(15)];
110: }
111:
112: my $ukey='';
113: for (0..7) {
114: $ukey.=$hexstr[rand(15)];
115: }
116:
117: my $lextkey=hex($lkey);
1.15 www 118: if ($lextkey>2147483647) { $lextkey-=4294967296; }
119:
1.6 www 120: my $uextkey=hex($ukey);
1.15 www 121: if ($uextkey>2147483647) { $uextkey-=4294967296; }
122:
1.31 www 123: # -------------------------------------------------------- Store away log token
1.6 www 124: my $logtoken=Apache::lonnet::reply(
1.7 www 125: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
1.6 www 126: $lonhost);
1.31 www 127:
128: # ------------------- If we cannot talk to ourselves, we are in serious trouble
129:
130: if ($logtoken eq 'con_lost') {
131: my $spares='';
132: foreach (keys %Apache::lonnet::hostname) {
133: if ($_ ne $lonhost) {
134: $spares.='<br /><a href="http://'.$Apache::lonnet::hostname{$_}.
135: '/adm/login?domain='.$authdomain.'">'.
136: $Apache::lonnet::hostname{$_}.'</a>';
137: if ($Apache::lonnet::spareid{$_}) {
138: $spares.=' (preferred)';
139: }
140: }
141: }
142: $r->print(<<ENDTROUBLE);
143: <html>
144: <head><title>The LearningOnline Network with CAPA</title></head>
145: <body bgcolor="#FFFFFF">
146: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />
147: <h3>This LON-CAPA server is temporarily not available for login</h3>
148: <p>Please attempt to login to one of the following servers:</p>$spares
149: <p>If the problem persists, please contact <tt>$servadm</tt>.</p>
150: </body>
151: </html>
152: ENDTROUBLE
153: return OK;
154: }
155:
156: # ----------------------------------------------- Apparently we are in business
157:
1.20 www 158: my $domainlogo=&Apache::loncommon::domainlogo();
1.6 www 159: # --------------------------------------------------- Print login screen header
160: $r->print(<<ENDHEADER);
1.1 albertel 161: <html>
162: <head>
1.2 www 163: <title>The LearningOnline Network with CAPA Login</title>
1.1 albertel 164: </head>
1.6 www 165: ENDHEADER
166: # ---------------------------------------------------- Serve out DES JavaScript
167: {
168: my $jsh=Apache::File->new($include."/londes.js");
169: $r->print(<$jsh>);
170: }
1.21 www 171:
172: # ----------------------------------------------------------- Front page design
173: my $pgbg=&Apache::loncommon::designparm('login.pgbg');
174: my $font=&Apache::loncommon::designparm('login.font');
175: my $link=&Apache::loncommon::designparm('login.link');
176: my $vlink=&Apache::loncommon::designparm('login.vlink');
177: my $alink=&Apache::loncommon::designparm('login.alink');
178: my $mainbg=&Apache::loncommon::designparm('login.mainbg');
179: my $sidebg=&Apache::loncommon::designparm('login.sidebg');
180: my $logo=&Apache::loncommon::designparm('login.logo');
181: my $img=&Apache::loncommon::designparm('login.img');
182:
183:
1.6 www 184: # ---------------------------------------------------------- Serve rest of page
1.16 www 185: $r->print(<<ENDSCRIPT);
1.6 www 186:
1.21 www 187: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
1.27 albertel 188: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
1.6 www 189:
1.14 albertel 190: <script language="JavaScript">
191: function send()
192: {
1.6 www 193: this.document.server.elements.uname.value
194: =this.document.client.elements.uname.value;
195:
196: this.document.server.elements.udom.value
197: =this.document.client.elements.udom.value;
198:
1.33 ! www 199: this.document.server.elements.imagesuppress.value
! 200: =this.document.client.elements.imagesuppress.value;
! 201:
! 202: this.document.server.elements.embedsuppress.value
! 203: =this.document.client.elements.embedsuppress.value;
! 204:
! 205: this.document.server.elements.fontenhance.value
! 206: =this.document.client.elements.fontenhance.value;
! 207:
! 208: this.document.server.elements.blackwhite.value
! 209: =this.document.client.elements.blackwhite.value;
! 210:
1.6 www 211: uextkey=this.document.client.elements.uextkey.value;
212: lextkey=this.document.client.elements.lextkey.value;
213: initkeys();
214:
215: this.document.server.elements.upass.value
216: =crypted(this.document.client.elements.upass.value);
217:
218: this.document.server.submit();
1.19 bowersj2 219: return false;
1.6 www 220: }
1.14 albertel 221: </script>
1.16 www 222: ENDSCRIPT
1.6 www 223:
1.16 www 224: if ($fullgraph) {
225: $r->print(
226: '<table width="100%" cellpadding=0 cellspacing=0 border=0>');
227: }
1.6 www 228:
1.16 www 229: $r->print(<<ENDSERVERFORM);
1.14 albertel 230: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
1.33 ! www 231: <input type="hidden" name="logtoken" value="$logtoken" />
! 232: <input type="hidden" name="serverid" value="$lonhost" />
! 233: <input type="hidden" name="interface" value="$ENV{'form.interface'}" />
! 234: <input type="hidden" name="uname" value="" />
! 235: <input type="hidden" name="upass" value="" />
! 236: <input type="hidden" name="udom" value="" />
! 237: <input type="hidden" name="imagesuppress" value="" />
! 238: <input type="hidden" name="embedsuppress" value="" />
! 239: <input type="hidden" name="fontenhance" value="" />
! 240: <input type="hidden" name="blackwhite" value="" />
1.14 albertel 241: </form>
1.16 www 242: ENDSERVERFORM
243: if ($fullgraph) { $r->print(<<ENDTOP);
1.14 albertel 244: <!-- The LON-CAPA Header -->
245: <tr>
246:
247: <!-- Row 1 Columns 2-4 -->
1.29 www 248: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
1.14 albertel 249: </tr>
250:
251: <!-- The gray bar that starts the two table frames -->
252: <tr>
253:
254: <!-- Row 2 Column 1 -->
1.21 www 255: <td width=182 height=27 bgcolor="$sidebg"> </td>
1.14 albertel 256:
257: <!-- Row 2 Column 2 -->
1.19 bowersj2 258: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
1.14 albertel 259:
260: <!-- Row 2 Column 3 -->
1.19 bowersj2 261: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
1.14 albertel 262:
263: <!-- Row 2 Column 4 -->
1.19 bowersj2 264: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
1.14 albertel 265: </tr>
266: <tr>
267:
268: <!-- A cell that will hold the 'access' and 'about' buttons -->
269: <!-- Row 3 Column 1 -->
1.21 www 270: <td valign="top" height=60 align="center" bgcolor="$sidebg">
1.19 bowersj2 271: <a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
1.14 albertel 272: <br />
1.19 bowersj2 273: <a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
1.14 albertel 274: </td>
275:
276: <!-- The shaded space between the two main columns -->
277: <!-- Row 3 Column 2 -->
1.19 bowersj2 278: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 279:
280: <!-- The right main column holding the large LON-CAPA logo-->
281: <!-- Rows 3-4 Column 3 -->
1.21 www 282: <td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
1.14 albertel 283: <center>
1.21 www 284: <img src="$logo" alt="" />
1.14 albertel 285: </center>
286: </td>
287:
288: <!-- Row 3 Column 4 -->
1.19 bowersj2 289: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 290: </tr>
291: <tr>
292:
293: <!-- The entry form -->
294: <!-- Row 4 Column 1 -->
1.21 www 295: <td align="center" valign="middle" bgcolor="$sidebg">
1.16 www 296: ENDTOP
1.32 www 297: } else {
1.33 ! www 298: $r->print('<font color="#FFFFFF"><h1>The Learning<i>Online</i> Network with CAPA</h1><h1>Text-based Interface Login</h1></font>');
! 299: }
! 300: $r->print('<form name="client" onsubmit="return(send())">');
! 301: unless ($fullgraph) {
! 302: $r->print(<<ENDACCESSOPTIONS);
! 303: <table bgcolor="#AAAAAA" cellspacing="3" cellpadding="3">
! 304: <tr><th>Select Accessibility Options</th></tr>
! 305: <tr>
! 306: <td bgcolor="#FFFFFF">
! 307: <input type="checkbox" name="imagesuppress" /> Suppress rendering of images<br />
! 308: <input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia<br />
! 309: <input type="checkbox" name="fontenhance" /> Increase font size<br />
! 310: <input type="checkbox" name="blackwhite" /> Switch to black and white mode<br /></td></tr></table>
! 311: ENDACCESSOPTIONS
! 312: } else {
! 313: $r->print(<<ENDNOOPT);
! 314: <input type="hidden" name="imagesuppress" value="" />
! 315: <input type="hidden" name="embedsuppress" value="" />
! 316: <input type="hidden" name="fontenhance" value="" />
! 317: <input type="hidden" name="blackwhite" value="" />
! 318: ENDNOOPT
1.16 www 319: }
320: $r->print(<<ENDLOGIN);
1.14 albertel 321: <input type="hidden" name="lextkey" value="$lextkey">
322: <input type="hidden" name="uextkey" value="$uextkey">
323:
324: <!-- Start the sub-table for text and input alignment -->
325: <table border=0 cellspacing=0 cellpadding=0>
1.21 www 326: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
1.14 albertel 327: <tr>
1.21 www 328: <td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
1.30 www 329: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>
1.14 albertel 330: </tr>
331: <tr>
1.21 www 332: <td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
333: <td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
1.14 albertel 334: </tr>
335: <tr>
1.21 www 336: <td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
1.30 www 337: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>
1.14 albertel 338: </tr>
339: <tr>
1.28 www 340: <td bgcolor="$mainbg"> <a href="/adm/loginproblems.html">Help</a></td>
341: <td bgcolor="$mainbg" valign="bottom" align="center">
1.14 albertel 342: <br />
1.19 bowersj2 343: <input type="submit" value="Log In" />
1.14 albertel 344: </td>
345: </tr>
346: </table>
347: <!-- End sub-table -->
348: </form>
1.16 www 349: ENDLOGIN
350: if ($fullgraph) {
351: $r->print(<<ENDDOCUMENT);
1.14 albertel 352: </td>
353:
354: <!-- Row 4 Column 2 -->
1.19 bowersj2 355: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 356:
357: <!-- Row 4 Column 4 -->
1.19 bowersj2 358: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 359: </tr>
360: <tr>
361:
362: <!-- Row 5 Column 1 -->
1.21 www 363: <td bgcolor="$sidebg" valign="middle" align="left">
1.14 albertel 364: <br />
365: <table border=0 cellspacing=0 cellpadding=0>
366: <tr>
1.21 www 367: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 368: <small><b> Domain: </b></small>
369: </td>
1.21 www 370: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 371: <small><tt> $domain</tt></small>
372: </td>
373: </tr>
374: <tr>
1.21 www 375: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 376: <small><b> Server: </b></small>
377: </td>
1.21 www 378: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 379: <small><tt> $lonhost ($role)</tt></small>
380: </td>
381: </tr>
382: <tr>
1.21 www 383: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 384: <small><b> Load: </b></small>
385: </td>
1.21 www 386: <td bgcolor="$sidebg" align="left" valign="top">
1.14 albertel 387: <small><tt> $loadpercent percent</tt></small>
388: </td>
389: </tr>
390: </table>
391: <br />
392: <small>
393: <b> System Administration:</b><br />
394: <tt> $sysadm</tt><br />
395: <b> Server Administration:</b><br />
1.19 bowersj2 396: <tt> $servadm<br /> </tt>
1.14 albertel 397: </small>
398: </td>
399:
400: <!-- Row 5 Column 2 -->
1.19 bowersj2 401: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
1.14 albertel 402:
403: <!-- Row 5 Column 3 -->
1.21 www 404: <td width="100%" valign="bottom" bgcolor="$mainbg">
1.20 www 405: $domainlogo
406: </td>
1.14 albertel 407:
408: <!-- Row 5 Column 4 -->
1.19 bowersj2 409: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
1.14 albertel 410: </tr>
411: <tr>
412:
413: <!-- Row 6 Column 1 -->
1.21 www 414: <td bgcolor="$sidebg"> </td>
1.14 albertel 415:
416: <!-- Row 6 Column 2 -->
1.19 bowersj2 417: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
1.14 albertel 418:
419: <!-- Row 6 Column 3 -->
1.19 bowersj2 420: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
1.14 albertel 421:
422: <!-- Row 6 Column 4 -->
1.19 bowersj2 423: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
1.14 albertel 424: </tr>
1.1 albertel 425: </table>
1.25 bowersj2 426:
427: <script>
428: // the if prevents the script error if the browser can't handle this
429: if ( document.client.uname ) { document.client.uname.focus(); }
430: </script>
1.14 albertel 431:
1.1 albertel 432: ENDDOCUMENT
1.16 www 433: }
434: $r->print('</body></html>');
1.1 albertel 435: return OK;
436: }
437:
438: 1;
439: __END__
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