'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
- ,'','','','')
- .'
'
- .$end_page
- );
- return OK;
- }
- }
-
-# ---------------------------------------------------- No valid token, continue
-
-
- my $buffer;
- if ($r->header_in('Content-length') > 0) {
- $r->read($buffer,$r->header_in('Content-length'),0);
- }
- my %form;
- foreach my $pair (split(/&/,$buffer)) {
- my ($name,$value) = split(/=/,$pair);
- $value =~ tr/+/ /;
- $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
- $form{$name}=$value;
- }
-
- if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
- &failed($r,'Username, password and domain need to be specified.',
- \%form);
- return OK;
- }
-
-# split user logging in and "su"-user
-
- ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
- $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
- $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
- $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
-
- my $role = $r->dir_config('lonRole');
- my $domain = $r->dir_config('lonDefDomain');
- my $prodir = $r->dir_config('lonUsersDir');
- my $contact_name = &mt('LON-CAPA helpdesk');
-
-# ---------------------------------------- Get the information from login token
-
- my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
- $form{'serverid'});
-
- if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
- &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
- return OK;
- } else {
- my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
- $form{'serverid'});
- if ( $reply ne 'ok' ) {
- &failed($r,'Session could not be opened.',\%form);
- &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
- return OK;
- }
- }
-
- if (!&Apache::lonnet::domain($form{'udom'})) {
- &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
- return OK;
- }
-
- my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
- if ($rolestr) {
- $rolestr = &unescape($rolestr);
- }
- if ($symbstr) {
- $symbstr= &unescape($symbstr);
- }
- if ($rolestr =~ /^role=/) {
- (undef,$form{'role'}) = split('=',$rolestr);
- }
- if ($symbstr =~ /^symb=/) {
- (undef,$form{'symb'}) = split('=',$symbstr);
- }
-
- my $keybin=pack("H16",$key);
-
- my $cipher;
- if ($Crypt::DES::VERSION>=2.03) {
- $cipher=new Crypt::DES $keybin;
- }
- else {
- $cipher=new DES $keybin;
- }
- my $upass='';
- for (my $i=0;$i<=2;$i++) {
- my $chunk=
- $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
-
- $chunk.=
- $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
-
- $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
- $upass.=$chunk;
- }
-
-# ---------------------------------------------------------------- Authenticate
- my @cancreate;
- my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
- if (ref($domconfig{'usercreation'}) eq 'HASH') {
- if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
- if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
- @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
- } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
- ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
- @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
- }
- }
- }
- my $defaultauth;
- if (grep(/^login$/,@cancreate)) {
- $defaultauth = 1;
- }
- my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
- $form{'udom'},$defaultauth);
-
-# --------------------------------------------------------------------- Failed?
-
- if ($authhost eq 'no_host') {
- &failed($r,'Username and/or password could not be authenticated.',
- \%form);
- return OK;
- } elsif ($authhost eq 'no_account_on_host') {
- my %domconfig =
- &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
- if (grep(/^login$/,@cancreate)) {
- my $start_page =
- &Apache::loncommon::start_page('Create a user account in LON-CAPA',
- '',{'no_inline_link' => 1,});
- my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
- my $lonhost = $r->dir_config('lonHostID');
- my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
- my $contacts =
- &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
- $form{'udom'},$origmail);
- my ($contact_email) = split(',',$contacts);
- my $output = &Apache::createaccount::username_check($form{'uname'},
- $form{'udom'},$domdesc,'',
- $lonhost,$contact_email,$contact_name);
- &Apache::loncommon::content_type($r,'text/html');
- $r->send_http_header;
- &Apache::createaccount::print_header($r,$start_page);
- $r->print(' 1};
+ }
+
+ my @actions;
+ my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
+ my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
+ my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
+ if (&Apache::lonnet::domain($udom,'description') eq '') {
+ undef($udom);
+ }
+ my $authtype;
+ if (($udom ne '') && ($uname ne '') && ($authhost eq 'no_host')) {
+ $authtype = &Apache::lonnet::queryauthenticate($uname,$udom);
+ }
+ my $retry = '/adm/login';
+ if (($uname eq $form->{'uname'}) && ($authtype !~ /^lti:/)) {
+ $retry .= '?username='.$uname;
+ }
+ if ($udom) {
+ $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
+ }
+ my $lonhost = $r->dir_config('lonHostID');
+ my $querystr;
+ my $result = &set_retry_token($form,$lonhost,\$querystr);
+ if ($result eq 'fail') {
+ if (exists($form->{role})) {
+ my $role = &Apache::loncommon::cleanup_html($form->{role});
+ if ($role ne '') {
+ $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
+ }
+ }
+ if (exists($form->{symb})) {
+ my $symb = &Apache::loncommon::cleanup_html($form->{symb});
+ if ($symb ne '') {
+ $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
+ }
+ }
+ if (exists($form->{firsturl})) {
+ my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
+ if ($firsturl ne '') {
+ $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl;
+ if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
+ unless (exists($form->{linkprot})) {
+ if (exists($form->{linkkey})) {
+ $retry .= 'linkkey='.$form->{linkkey};
+ }
+ }
+ }
+ }
+ }
+ if (exists($form->{linkprot})) {
+ my $ltoken = &Apache::lonnet::tmpput({linkprot => $form->{'linkprot'}},
+ $r->dir_config('lonHostID'),'retry');
+ if ($ltoken) {
+ $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
+ }
+ }
+ } elsif ($querystr ne '') {
+ $retry .= (($retry=~/\?/)?'&':'?').$querystr;
+ }
+ my $end_page = &Apache::loncommon::end_page();
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ if ($authtype =~ /^lti:/) {
+ $message = &mt('Direct login is not supported with the username you entered.').
+ '
'.
+ &mt('You likely need to launch LON-CAPA from within a course in a different Learning Management System.').
+ '
'.
+ &mt('You can also try to log in with a different username.');
+ @actions =
+ (&mt('Try your [_1]log in again[_2].','',''));
+ } else {
+ $message = &mt($message);
+ @actions =
+ (&mt('Please [_1]log in again[_2].','',''));
+ }
+ my $loginhelp = &loginhelpdisplay($udom);
+ if ($loginhelp) {
+ push(@actions, ''.&mt('Login problems?').'');
+ }
+ #FIXME: link to helpdesk might be added here
+ $r->print(
+ $start_page
+ .''.&mt('Sorry ...').'
'
+ .&Apache::lonhtmlcommon::confirm_success($message,1).'
'
+ .&Apache::lonhtmlcommon::actionbox(\@actions)
+ .$end_page
+ );
+ }
+
+# ------------------------------------------------------------------ Rerouting!
+
+sub reroute {
+ my ($r) = @_;
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ my $msg=''.&mt('Sorry ...').'
'
+ .&mt('Please [_1]log in again[_2].');
+ &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
+}
+
+# ---------------------------------------------------------------- Main handler
+
+sub handler {
+ my $r = shift;
+ my $londocroot = $r->dir_config('lonDocRoot');
+# Are we re-routing?
+ if (-e "$londocroot/lon-status/reroute.txt") {
+ &reroute($r);
+ return OK;
+ }
+
+ &Apache::lonlocal::get_language_handle($r);
+
+# -------------------------------- Prevent users from attempting to login twice
+ my $handle = &Apache::lonnet::check_for_valid_session($r);
+ if ($handle ne '') {
+ my $lonidsdir=$r->dir_config('lonIDsDir');
+ if ($handle=~/^publicuser\_/) {
+# For "public user" - remove it, we apparently really want to login
+ unlink($r->dir_config('lonIDsDir')."/$handle.id");
+ } else {
+# Indeed, a valid token is found
+ &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ my $start_page =
+ &Apache::loncommon::start_page('Already logged in');
+ my $end_page =
+ &Apache::loncommon::end_page();
+ my $dest = '/adm/roles';
+ my %form = &get_form_items($r);
+ if ($form{'logtoken'}) {
+ my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
+ $form{'serverid'});
+ unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
+ ($tmpinfo eq 'no_such_host')) {
+ my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
+ $firsturl = &unescape($firsturl);
+ my %info;
+ foreach my $item (@rest) {
+ my ($key,$value) = split(/=/,$item);
+ $info{$key} = &unescape($value);
+ }
+ if ($firsturl ne '') {
+ $info{'firsturl'} = $firsturl;
+ $dest = $firsturl;
+ my $relogin;
+ if ($dest =~ m{^/tiny/$match_domain/\w+$}) {
+ if ($env{'request.course.id'}) {
+ my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+ my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+ my $symb = &Apache::loncommon::symb_from_tinyurl($dest,$cnum,$cdom);
+ if ($symb) {
+ unless (&set_deeplink_login(%info) eq 'ok') {
+ $relogin = 1;
+ }
+ }
+ }
+ if ($relogin) {
+ $r->print(
+ $start_page
+ .''.&mt('You are already logged in!').'
'
+ .''.&mt('Please [_1]log out[_2] first, and then try your access again',
+ '','')
+ .'
'
+ .$end_page);
+ } else {
+ if (($info{'linkprot'}) || ($info{'linkkey'} ne '')) {
+ my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
+ unless (($token eq 'con_lost') || ($token eq 'refused') ||
+ ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
+ $dest .= (($dest =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
+ }
+ }
+ $r->print(
+ $start_page
+ .''.&mt('You are already logged in!').'
'
+ .''.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4] first, and then try your access again',
+ '','',
+ '','')
+ .'
'
+ .$end_page);
+ }
+ return OK;
+ }
+ }
+ }
+ }
+ $r->print(
+ $start_page
+ .''.&mt('You are already logged in!').'
'
+ .''.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
+ ,'','','','')
+ .'
'
+ .$end_page
+ );
+ return OK;
+ }
+ }
+
+# ---------------------------------------------------- No valid token, continue
+
+ my %form = &get_form_items($r);
+ if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
+ &failed($r,'Username, password and domain need to be specified.',
+ \%form);
+ return OK;
+ }
+
+# split user logging in and "su"-user
+
+ ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
+ $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
+ $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
+ $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
+ $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
+
+ my $role = $r->dir_config('lonRole');
+ my $domain = $r->dir_config('lonDefDomain');
+ my $prodir = $r->dir_config('lonUsersDir');
+ my $contact_name = &mt('LON-CAPA helpdesk');
+
+# ---------------------------------------- Get the information from login token
+
+ my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
+ $form{'serverid'});
+
+ if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
+ ($tmpinfo eq 'no_such_host')) {
+ &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
+ return OK;
+ } else {
+ my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
+ $form{'serverid'});
+ if ( $reply ne 'ok' ) {
+ &failed($r,'Session could not be opened.',\%form);
+ &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
+ return OK;
+ }
+ }
+
+ if (!&Apache::lonnet::domain($form{'udom'})) {
+ &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
+ return OK;
+ }
+
+ my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
+ $firsturl = &unescape($firsturl);
+ foreach my $item (@rest) {
+ my ($key,$value) = split(/=/,$item);
+ $form{$key} = &unescape($value);
+ }
+ if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
+ $form{'firsturl'} = $firsturl;
+ }
+ my $upass = $ENV{HTTPS} ? $form{'upass0'}
+ : &Apache::loncommon::des_decrypt($des_key,$form{'upass0'});
+
+# ---------------------------------------------------------------- Authenticate
+
+ my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
+ my ($cancreate,$statustocreate) =
+ &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
+ my $defaultauth;
+ if (ref($cancreate) eq 'ARRAY') {
+ if (grep(/^login$/,@{$cancreate})) {
+ $defaultauth = 1;
+ }
+ }
+ my $clientcancheckhost = 1;
+ my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
+ $form{'udom'},$defaultauth,
+ $clientcancheckhost);
+
+# --------------------------------------------------------------------- Failed?
+
+ if ($authhost eq 'no_host') {
+ my $pwdverify;
+ if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') {
+ my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'});
+ if (keys(%possunames) > 0) {
+ foreach my $rulematch (keys(%possunames)) {
+ my $possuname = $possunames{$rulematch};
+ if (($possuname ne '') && ($possuname =~ /^$match_username$/)) {
+ $authhost=Apache::lonnet::authenticate($possuname,$upass,
+ $form{'udom'},undef,
+ $clientcancheckhost);
+ if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) {
+ next;
+ } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) {
+ $pwdverify = 1;
+ &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}");
+ $form{'uname'} = $possuname;
+ last;
+ }
+ }
+ }
+ }
+ }
+ unless ($pwdverify) {
+ &failed($r,'Username and/or password could not be authenticated.',
+ \%form,$authhost);
+ return OK;
+ }
+ } elsif ($authhost eq 'no_account_on_host') {
+ if ($defaultauth) {
+ my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
+ unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
+ return OK;
+ }
+ my $start_page =
+ &Apache::loncommon::start_page('Create a user account in LON-CAPA',
+ '',{'no_inline_link' => 1,});
+ my $lonhost = $r->dir_config('lonHostID');
+ my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
+ my $contacts =
+ &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
+ $form{'udom'},$origmail);
+ my ($contact_email) = split(',',$contacts);
+ my $output =
+ &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
+ $domdesc,'',$lonhost,
+ $contact_email,$contact_name,
+ undef,$statustocreate);
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ &Apache::createaccount::print_header($r,$start_page);
+ $r->print(''.&mt('Account creation').'
'.
+ &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'
'.
+ $output.&Apache::loncommon::end_page());
+ return OK;
+ } else {
+ &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
+ return OK;
+ }
+ }
+
+ if (($firsturl eq '') ||
+ ($firsturl=~/^\/adm\/(logout|remote)/)) {
+ $firsturl='/adm/roles';
+ }
+
+ my ($hosthere,%sessiondata);
+ if ($form{'iptoken'}) {
+ %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
+ my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
+ if (($sessiondata{'domain'} eq $form{'udom'}) &&
+ ($sessiondata{'username'} eq $form{'uname'})) {
+ $hosthere = 1;
+ }
+ }
+
+# --------------------------------- Are we attempting to login as somebody else?
+ if ($form{'suname'}) {
+ my ($suname,$sudom,$sudomref);
+ $suname = $form{'suname'};
+ $sudom = $form{'udom'};
+ if ($form{'sudom'}) {
+ unless ($sudom eq $form{'sudom'}) {
+ if (&Apache::lonnet::domain($form{'sudom'})) {
+ $sudomref = [$form{'sudom'}];
+ $sudom = $form{'sudom'};
+ }
+ }
+ }
+# ------------ see if the original user has enough privileges to pull this stunt
+ if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
+# ---------------------------------------------------- see if the su-user exists
+ unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
+# ------------------------------ see if the su-user is not too highly privileged
+ if (&Apache::lonnet::privileged($suname,$sudom)) {
+ &Apache::lonnet::logthis('Attempted switch user to privileged user');
+ } else {
+ my $noprivswitch;
+#
+# su-user's home server and user's home server must have one of:
+# (a) same domain
+# (b) same primary library server for the two domains
+# (c) same "internet domain" for primary library server(s) for home servers' domains
+#
+ my $suprim = &Apache::lonnet::domain($sudom,'primary');
+ my $suintdom = &Apache::lonnet::internet_dom($suprim);
+ unless ($sudom eq $form{'udom'}) {
+ my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
+ my $uintdom = &Apache::lonnet::internet_dom($uprim);
+ unless ($suprim eq $uprim) {
+ unless ($suintdom eq $uintdom) {
+ &Apache::lonnet::logthis('Attempted switch user '
+ .'to user with different "internet domain".');
+ $noprivswitch = 1;
+ }
+ }
+ }
+
+ unless ($noprivswitch) {
+#
+# server where log-in occurs must have same "internet domain" as su-user's home
+# server
+#
+ my $lonhost = $r->dir_config('lonHostID');
+ my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
+ if ($hostintdom ne $suintdom) {
+ &Apache::lonnet::logthis('Attempted switch user on a '
+ .'server with a different "internet domain".');
+ } else {
+
+# -------------------------------------------------------- actually switch users
+
+ &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
+ $form{'udom'}.' logging in as '.$suname.':'.$sudom);
+ $form{'uname'}=$suname;
+ if ($form{'udom'} ne $sudom) {
+ $form{'udom'}=$sudom;
+ }
+ }
+ }
+ }
+ }
+ } else {
+ &Apache::lonnet::logthis('Non-privileged user attempting switch user');
+ }
+ }
+
+ my ($is_balancer,$otherserver);
+
+ unless ($hosthere) {
+ ($is_balancer,$otherserver) =
+ &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
+ if ($is_balancer) {
+ # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
+ my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
+ if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
+ $otherserver = $found_server;
+ }
+ if ($otherserver eq '') {
+ my $lowest_load;
+ ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
+ if ($lowest_load > 100) {
+ $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'});
+ }
+ }
+ if ($otherserver ne '') {
+ my @hosts = &Apache::lonnet::current_machine_ids();
+ if (grep(/^\Q$otherserver\E$/,@hosts)) {
+ $hosthere = $otherserver;
+ }
+ }
+ }
+ }
+
+ if (($is_balancer) && (!$hosthere)) {
+ if ($otherserver) {
+ &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
+ \%form);
+ my $switchto = '/adm/switchserver?otherserver='.$otherserver;
+ if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
+ $switchto .= '&origurl='.$firsturl;
+ }
+ if ($form{'role'}) {
+ $switchto .= '&role='.$form{'role'};
+ }
+ if ($form{'symb'}) {
+ $switchto .= '&symb='.$form{'symb'};
+ }
+ if ($form{'linkprot'}) {
+ $env{'request.linkprot'} = $form{'linkprot'};
+ } elsif ($form{'linkkey'} ne '') {
+ $env{'request.linkkey'} = $form{'linkkey'};
+ }
+ if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
+ &set_deeplink_login(%form);
+ }
+ $r->internal_redirect($switchto);
+ } else {
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ $r->print(&noswitch());
+ }
+ return OK;
+ } else {
+ if (!&check_can_host($r,\%form,$authhost)) {
+ my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
+ if ($otherserver) {
+ &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
+ \%form);
+ my $switchto = '/adm/switchserver?otherserver='.$otherserver;
+ if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
+ $switchto .= '&origurl='.$firsturl;
+ }
+ if ($form{'role'}) {
+ $switchto .= '&role='.$form{'role'};
+ }
+ if ($form{'symb'}) {
+ $switchto .= '&symb='.$form{'symb'};
+ }
+ if ($form{'linkprot'}) {
+ $env{'request.linkprot'} = $form{'linkprot'};
+ } elsif ($form{'linkkey'} ne '') {
+ $env{'request.linkkey'} = $form{'linkkey'};
+ }
+ if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
+ &set_deeplink_login(%form);
+ }
+ $r->internal_redirect($switchto);
+ } else {
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ $r->print(&noswitch());
+ }
+ return OK;
+ }
+
+# ------------------------------------------------------- Do the load balancing
+
+# ---------------------------------------------------------- Determine own load
+ my $loadlim = $r->dir_config('lonLoadLim');
+ my $loadavg;
+ {
+ my $loadfile=Apache::File->new('/proc/loadavg');
+ $loadavg=<$loadfile>;
+ }
+ $loadavg =~ s/\s.*//g;
+ my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
+ my $userloadpercent=&Apache::lonnet::userload();
+
+# ---------------------------------------------------------- Are we overloaded?
+ if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
+ my $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$userloadpercent,1,$form{'udom'});
+ if (!$unloaded) {
+ ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
+ }
+ if ($unloaded) {
+ &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
+ undef,\%form);
+ if ($form{'linkprot'}) {
+ $env{'request.linkprot'} = $form{'linkprot'};
+ } elsif ($form{'linkkey'} ne '') {
+ $env{'request.linkkey'} = $form{'linkkey'};
+ }
+ if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
+ &set_deeplink_login(%form);
+ }
+ $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
+ return OK;
+ }
+ }
+ if (($is_balancer) && ($hosthere)) {
+ $form{'noloadbalance'} = $hosthere;
+ }
+ my $extra_env;
+ if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) {
+ if ($sessiondata{'origurl'} ne '') {
+ $firsturl = $sessiondata{'origurl'};
+ $form{'firsturl'} = $sessiondata{'origurl'};
+ my @names = ('role','symb','linkprot','linkkey');
+ foreach my $item (@names) {
+ if ($sessiondata{$item} ne '') {
+ $form{$item} = $sessiondata{$item};
+ }
+ }
+ }
+ }
+ if ($form{'linkprot'}) {
+ my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2);
+ if ($linkprotector) {
+ $extra_env = {'user.linkprotector' => $linkprotector,
+ 'user.linkproturi' => $uri};
+ }
+ } elsif ($form{'linkkey'} ne '') {
+ $extra_env = {'user.deeplinkkey' => $form{'linkkey'},
+ 'user.keyedlinkuri' => $form{'firsturl'}};
+ }
+ if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
+ &set_deeplink_login(%form);
+ if ($form{'linkprot'}) {
+ if (ref($extra_env) eq 'HASH') {
+ %{$extra_env} = ( %{$extra_env}, 'request.linkprot' => $form{'linkprot'} );
+ } else {
+ $extra_env = {'request.linkprot' => $form{'linkprot'}};
+ }
+ } elsif ($form{'linkkey'} ne '') {
+ if (ref($extra_env) eq 'HASH') {
+ %{$extra_env} = ( %{$extra_env}, 'request.linkkey' => $form{'linkkey'} );
+ } else {
+ $extra_env = {'request.linkkey' => $form{'linkkey'}};
+ }
+ }
+ if ($env{'request.deeplink.login'}) {
+ if (ref($extra_env) eq 'HASH') {
+ %{$extra_env} = ( %{$extra_env}, 'request.deeplink.login' => $form{'firsturl'} );
+ } else {
+ $extra_env = {'request.deeplink.login' => $form{'firsturl'}};
+ }
+ }
+ }
+ &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env,
+ \%form);
+ return OK;
+ }
+}
+
+sub get_form_items {
+ my ($r) = @_;
+ my $buffer;
+ if ($r->header_in('Content-length') > 0) {
+ $r->read($buffer,$r->header_in('Content-length'),0);
+ }
+ my %form;
+ foreach my $pair (split(/&/,$buffer)) {
+ my ($name,$value) = split(/=/,$pair);
+ $value =~ tr/+/ /;
+ $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+ $form{$name}=$value;
+ }
+ return %form;
+}
+
+sub set_deeplink_login {
+ my (%form) = @_;
+ my $disallow;
+ if ($form{'firsturl'} =~ m{^/tiny/($match_domain)/\w+$}) {
+ my $cdom = $1;
+ my ($cnum,$symb) = &Apache::loncommon::symb_from_tinyurl($form{'firsturl'},'',$cdom);
+ if ($symb) {
+ if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
+ my $deeplink;
+ if ($symb =~ /\.(page|sequence)$/) {
+ my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
+ my $navmap = Apache::lonnavmaps::navmap->new();
+ if (ref($navmap)) {
+ $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
+ }
+ } else {
+ $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
+ }
+ if ($deeplink ne '') {
+ my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
+ if (($protect ne 'none') && ($protect ne '')) {
+ my ($acctype,$item) = split(/:/,$protect);
+ if ($acctype =~ /lti(c|d)$/) {
+ unless ($form{'linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
+ $disallow = 1;
+ }
+ } elsif ($acctype eq 'key') {
+ unless ($form{'linkkey'} eq $item) {
+ $disallow = 1;
+ }
+ }
+ }
+ }
+ unless ($disallow) {
+ $env{'request.deeplink.login'} = $form{'firsturl'};
+ }
+ } else {
+ $env{'request.deeplink.login'} = $form{'firsturl'};
+ }
+ }
+ }
+ if ($disallow) {
+ return;
+ }
+ return 'ok';
+}
+
+sub set_retry_token {
+ my ($form,$lonhost,$querystr) = @_;
+ if (ref($form) eq 'HASH') {
+ my ($firsturl,$token,$extras,@names);
+ @names = ('role','symb','linkprot','linkkey','iptoken');
+ foreach my $name (@names) {
+ if ($form->{$name} ne '') {
+ $extras .= '&'.$name.'='.&escape($form->{$name});
+ last if ($name eq 'linkprot');
+ }
+ }
+ my $firsturl = $form->{'firsturl'};
+ if (($firsturl ne '') || ($extras ne '')) {
+ $extras .= ':retry';
+ $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl).
+ $extras,$lonhost);
+ if (($token eq 'con_lost') || ($token eq 'no_such_host')) {
+ return 'fail';
+ } else {
+ if (ref($querystr)) {
+ $$querystr = 'retry='.$token;
+ }
+ return 'ok';
+ }
+ }
+ }
+ return;
+}
+
+sub check_can_host {
+ my ($r,$form,$authhost,$domdesc) = @_;
+ return unless (ref($form) eq 'HASH');
+ my $canhost = 1;
+ my $lonhost = $r->dir_config('lonHostID');
+ my $udom = $form->{'udom'};
+ my @intdoms;
+ my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
+ if (ref($internet_names) eq 'ARRAY') {
+ @intdoms = @{$internet_names};
+ }
+ my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
+ my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
+ unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
+ my $machine_dom = &Apache::lonnet::host_domain($lonhost);
+ my $hostname = &Apache::lonnet::hostname($lonhost);
+ my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
+ my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+ my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
+ my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
+ my $loncaparev;
+ if ($authhost eq 'no_account_on_host') {
+ $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
+ } else {
+ $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
+ }
+ $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
+ $udomdefaults{'remotesessions'},
+ $defdomdefaults{'hostedsessions'});
+ }
+ unless ($canhost) {
+ if ($authhost eq 'no_account_on_host') {
+ my $checkloginvia = 1;
+ my ($login_host,$hostname) =
+ &Apache::lonnet::choose_server($udom,$checkloginvia);
+ &Apache::loncommon::content_type($r,'text/html');
+ $r->send_http_header;
+ if ($login_host ne '') {
+ my $protocol = $Apache::lonnet::protocol{$login_host};
+ $protocol = 'http' if ($protocol ne 'https');
+ my $alias = &Apache::lonnet::use_proxy_alias($r,$login_host);
+ $hostname = $alias if ($alias ne '');
+ my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
+#FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host
+ $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
+ ''.&mt('Account creation').'
'.
+ &mt('You do not currently have a LON-CAPA account at this institution.').'
'.
+ ''.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'
'.
+ ''.&mt('[_1]Log in[_2]','','').
+ &Apache::loncommon::end_page());
+ } else {
+ $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
+ '
'.&mt('Account creation unavailable').'
'.
+ &mt('You do not currently have a LON-CAPA account at this institution.').'
'.
+ ''.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'
'.
+ &Apache::loncommon::end_page());
+ }
+ } else {
+ &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
+ $form);
+ if ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
+ $env{'request.deeplink.login'} = $form->{'firsturl'};
+ }
+ if ($form->{'linkprot'}) {
+ $env{'request.linkprot'} = $form->{'linkprot'};
+ } elsif ($form->{'linkkey'} ne '') {
+ $env{'request.linkkey'} = $form->{'linkkey'};
+ }
+ my ($otherserver) = &Apache::lonnet::choose_server($udom);
+ $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
+ }
+ }
+ return $canhost;
+}
+
+sub noswitch {
+ my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
+ ''.&mt('Session unavailable').'
'.
+ &mt('This LON-CAPA server is unable to host your session.').'
'.
+ ''.&mt('Currently no other LON-CAPA server is available to host your session either.').'
'.
+ &Apache::loncommon::end_page();
+ return $result;
+}
+
+sub loginhelpdisplay {
+ my ($authdomain) = @_;
+ my $login_help = 1;
+ my $lang = &Apache::lonlocal::current_language();
+ if ($login_help) {
+ my $dom = $authdomain;
+ if ($dom eq '') {
+ $dom = &Apache::lonnet::default_login_domain();
+ }
+ my %domconfhash = &Apache::loncommon::get_domainconf($dom);
+ my $loginhelp_url;
+ if ($lang) {
+ $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
+ if ($loginhelp_url ne '') {
+ return $loginhelp_url;
+ }
+ }
+ $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
+ if ($loginhelp_url ne '') {
+ return $loginhelp_url;
+ } else {
+ return '/adm/loginproblems.html';
+ }
+ }
+ return;
+}
+
+sub alternate_unames_check {
+ my ($uname,$udom) = @_;
+ my %possunames;
+ my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
+ if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') {
+ if (@{$domdefs{'unamemap_rule'}} > 0) {
+ %possunames =
+ &Apache::lonnet::inst_rulecheck($udom,$uname,undef,
+ 'unamemap',$domdefs{'unamemap_rule'});
+ }
+ }
+ return %possunames;
+}
+
+1;
+__END__
+
+