'.&mt('Updated [quant,_1,reference] in [_2].',
+ $count,''.
+ $container.'').'
';
+ } else {
+ $output = '
'.
+ &mt('Error: could not update [_1].',
+ ''.
+ $container.'').'
';
+ }
+ }
+ }
+ if (($context eq 'syllabus') && (!$skiprewrites)) {
+ my ($actionurl,$state);
+ $actionurl = "/public/$udom/$uname/syllabus";
+ my ($ignore,$num,$numpathchanges,$existing,$mapping) =
+ &ask_for_embedded_content($actionurl,$state,\%allfiles,
+ \%codebase,
+ {'context' => 'rewrites',
+ 'ignore_remote_references' => 1,});
+ if (ref($mapping) eq 'HASH') {
+ my $rewrites = 0;
+ foreach my $key (keys(%{$mapping})) {
+ next if ($key =~ m{^https?://});
+ my $ref = $mapping->{$key};
+ my $newname = "/uploaded/$udom/$uname/portfolio/syllabus/$key";
+ my $attrib;
+ if (ref($allfiles{$mapping->{$key}}) eq 'ARRAY') {
+ $attrib = join('|',@{$allfiles{$mapping->{$key}}});
+ }
+ if ($content =~ m{($attrib\s*=\s*['"]?)\Q$ref\E(['"]?)}) {
+ my $numchg = ($content =~ s{($attrib\s*=\s*['"]?)\Q$ref\E(['"]?)}{$1$newname$2}gi);
+ $rewrites += $numchg;
+ }
+ }
+ if ($rewrites) {
+ my $saveresult;
+ my $url = &Apache::lonnet::store_edited_file($container,$content,$udom,$uname,\$saveresult);
+ if ($url eq $container) {
+ my ($fname) = ($container =~ m{/([^/]+)$});
+ $output .= '
'.&mt('Rewrote [quant,_1,link] as [quant,_1,absolute link] in [_2].',
+ $count,''.
+ $fname.'').'
';
+ } else {
+ $output .= '
'.
+ &mt('Error: could not update links in [_1].',
+ ''.
+ $container.'').'
';
+
+ }
+ }
+ }
+ }
+ } else {
+ &logthis('Failed to parse '.$container.
+ ' to modify references: '.$parse_result);
+ }
+ }
+ if (wantarray) {
+ return ($output,$count,$codebasecount);
+ } else {
+ return $output;
+ }
+}
+
+sub check_for_existing {
+ my ($path,$fname,$element) = @_;
+ my ($state,$msg);
+ if (-d $path.'/'.$fname) {
+ $state = 'exists';
+ $msg = &mt('Unable to upload [_1]. A directory by that name was found in [_2].',''.$fname.'',$path);
+ } elsif (-e $path.'/'.$fname) {
+ $state = 'exists';
+ $msg = &mt('Unable to upload [_1]. A file by that name was found in [_2].',''.$fname.'',$path);
+ }
+ if ($state eq 'exists') {
+ $msg = ''.$msg.' ';
+ }
+ return ($state,$msg);
+}
+
+sub check_for_upload {
+ my ($path,$fname,$group,$element,$portfolio_root,$port_path,
+ $disk_quota,$current_disk_usage,$uname,$udom) = @_;
+ my $filesize = length($env{'form.'.$element});
+ if (!$filesize) {
+ my $msg = ''.
+ &mt('Unable to upload [_1]. (size = [_2] bytes)',
+ ''.$fname.'',
+ $filesize).' '.
+ &mt('Either the file you attempted to upload was empty, or your web browser was unable to read its contents.').' '.
+ '';
+ return ('zero_bytes',$msg);
+ }
+ $filesize = $filesize/1000; #express in k (1024?)
+ my $getpropath = 1;
+ my ($dirlistref,$listerror) =
+ &Apache::lonnet::dirlist($portfolio_root.$path,$udom,$uname,$getpropath);
+ my $found_file = 0;
+ my $locked_file = 0;
+ my @lockers;
+ my $navmap;
+ if ($env{'request.course.id'}) {
+ $navmap = Apache::lonnavmaps::navmap->new();
+ }
+ if (ref($dirlistref) eq 'ARRAY') {
+ foreach my $line (@{$dirlistref}) {
+ my ($file_name,$rest)=split(/\&/,$line,2);
+ if ($file_name eq $fname){
+ $file_name = $path.$file_name;
+ if ($group ne '') {
+ $file_name = $group.$file_name;
+ }
+ $found_file = 1;
+ if (&Apache::lonnet::is_locked($file_name,$udom,$uname,\@lockers) eq 'true') {
+ foreach my $lock (@lockers) {
+ if (ref($lock) eq 'ARRAY') {
+ my ($symb,$crsid) = @{$lock};
+ if ($crsid eq $env{'request.course.id'}) {
+ if (ref($navmap)) {
+ my $res = $navmap->getBySymb($symb);
+ foreach my $part (@{$res->parts()}) {
+ my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
+ unless (($slot_status == $res->RESERVED) ||
+ ($slot_status == $res->RESERVED_LOCATION)) {
+ $locked_file = 1;
+ }
+ }
+ } else {
+ $locked_file = 1;
+ }
+ } else {
+ $locked_file = 1;
+ }
+ }
+ }
+ } else {
+ my @info = split(/\&/,$rest);
+ my $currsize = $info[6]/1000;
+ if ($currsize < $filesize) {
+ my $extra = $filesize - $currsize;
+ if (($current_disk_usage + $extra) > $disk_quota) {
+ my $msg = '
'.
+ &mt('Unable to upload [_1]. (size = [_2] kilobytes). Disk quota will be exceeded if existing (smaller) file with same name (size = [_3] kilobytes) is replaced.',
+ ''.$fname.'',$filesize,$currsize).'
'.
+ '
'.&mt('Disk quota is [_1] kilobytes. Your current disk usage is [_2] kilobytes.',
+ $disk_quota,$current_disk_usage).'
'.
+ &mt('Unable to upload [_1]. (size = [_2] kilobytes). Disk quota will be exceeded.',''.$fname.'',$filesize).'
'.
+ '
'.&mt('Disk quota is [_1] kilobytes. Your current disk usage is [_2] kilobytes.',$disk_quota,$current_disk_usage).'
';
+ return ('will_exceed_quota',$msg);
+ } elsif ($found_file) {
+ if ($locked_file) {
+ my $msg = '
';
+ $msg .= &mt('Unable to upload [_1]. A locked file by that name was found in [_2].',''.$fname.'',''.$port_path.$env{'form.currentpath'}.'');
+ $msg .= '
';
+ $msg .= &mt('You will be able to rename or delete existing [_1] after a grade has been assigned.',''.$fname.'');
+ return ('file_locked',$msg);
+ } else {
+ my $msg = '
';
+ $msg .= &mt(' A file by that name: [_1] was found in [_2].',''.$fname.'',$port_path.$env{'form.currentpath'});
+ $msg .= '
';
+ return ('existingfile',$msg);
+ }
+ }
+}
+
+sub check_for_traversal {
+ my ($path,$url,$toplevel) = @_;
+ my @parts=split(/\//,$path);
+ my $cleanpath;
+ my $fullpath = $url;
+ for (my $i=0;$i<@parts;$i++) {
+ next if ($parts[$i] eq '.');
+ if ($parts[$i] eq '..') {
+ $fullpath =~ s{([^/]+/)$}{};
+ } else {
+ $fullpath .= $parts[$i].'/';
+ }
+ }
+ if ($fullpath =~ /^\Q$url\E(.*)$/) {
+ $cleanpath = $1;
+ } elsif ($fullpath =~ /^\Q$toplevel\E(.*)$/) {
+ my $curr_toprel = $1;
+ my @parts = split(/\//,$curr_toprel);
+ my ($url_toprel) = ($url =~ /^\Q$toplevel\E(.*)$/);
+ my @urlparts = split(/\//,$url_toprel);
+ my $doubledots;
+ my $startdiff = -1;
+ for (my $i=0; $i<@urlparts; $i++) {
+ if ($startdiff == -1) {
+ unless ($urlparts[$i] eq $parts[$i]) {
+ $startdiff = $i;
+ $doubledots .= '../';
+ }
+ } else {
+ $doubledots .= '../';
+ }
+ }
+ if ($startdiff > -1) {
+ $cleanpath = $doubledots;
+ for (my $i=$startdiff; $i<@parts; $i++) {
+ $cleanpath .= $parts[$i].'/';
+ }
+ }
+ }
+ $cleanpath =~ s{(/)$}{};
+ return $cleanpath;
+}
+
+sub is_archive_file {
+ my ($mimetype) = @_;
+ if (($mimetype eq 'application/octet-stream') ||
+ ($mimetype eq 'application/x-stuffit') ||
+ ($mimetype =~ m{^application/(x\-)?(compressed|tar|zip|tgz|gz|gtar|gzip|gunzip|bz|bz2|bzip2)})) {
+ return 1;
+ }
+ return;
+}
+
+sub decompress_form {
+ my ($mimetype,$archiveurl,$action,$noextract,$hiddenelements,$dirlist) = @_;
+ my %lt = &Apache::lonlocal::texthash (
+ this => 'This file is an archive file.',
+ camt => 'This file is a Camtasia archive file.',
+ itsc => 'Its contents are as follows:',
+ youm => 'You may wish to extract its contents.',
+ extr => 'Extract contents',
+ auto => 'LON-CAPA can process the files automatically, or you can decide how each should be handled.',
+ proa => 'Process automatically?',
+ yes => 'Yes',
+ no => 'No',
+ fold => 'Title for folder containing movie',
+ movi => 'Title for page containing embedded movie',
+ );
+ my $fileloc = &Apache::lonnet::filelocation(undef,$archiveurl);
+ my ($is_camtasia,$topdir,%toplevel,@paths);
+ my $info = &list_archive_contents($fileloc,\@paths);
+ if (@paths) {
+ foreach my $path (@paths) {
+ $path =~ s{^/}{};
+ if ($path =~ m{^([^/]+)/$}) {
+ $topdir = $1;
+ }
+ if ($path =~ m{^([^/]+)/}) {
+ $toplevel{$1} = $path;
+ } else {
+ $toplevel{$path} = $path;
+ }
+ }
+ }
+ if ($mimetype =~ m{^application/(x\-)?(compressed|zip)}) {
+ my @camtasia6 = ("$topdir/","$topdir/index.html",
+ "$topdir/media/",
+ "$topdir/media/$topdir.mp4",
+ "$topdir/media/FirstFrame.png",
+ "$topdir/media/player.swf",
+ "$topdir/media/swfobject.js",
+ "$topdir/media/expressInstall.swf");
+ my @camtasia8_1 = ("$topdir/","$topdir/$topdir.html",
+ "$topdir/$topdir.mp4",
+ "$topdir/$topdir\_config.xml",
+ "$topdir/$topdir\_controller.swf",
+ "$topdir/$topdir\_embed.css",
+ "$topdir/$topdir\_First_Frame.png",
+ "$topdir/$topdir\_player.html",
+ "$topdir/$topdir\_Thumbnails.png",
+ "$topdir/playerProductInstall.swf",
+ "$topdir/scripts/",
+ "$topdir/scripts/config_xml.js",
+ "$topdir/scripts/handlebars.js",
+ "$topdir/scripts/jquery-1.7.1.min.js",
+ "$topdir/scripts/jquery-ui-1.8.15.custom.min.js",
+ "$topdir/scripts/modernizr.js",
+ "$topdir/scripts/player-min.js",
+ "$topdir/scripts/swfobject.js",
+ "$topdir/skins/",
+ "$topdir/skins/configuration_express.xml",
+ "$topdir/skins/express_show/",
+ "$topdir/skins/express_show/player-min.css",
+ "$topdir/skins/express_show/spritesheet.png");
+ my @camtasia8_4 = ("$topdir/","$topdir/$topdir.html",
+ "$topdir/$topdir.mp4",
+ "$topdir/$topdir\_config.xml",
+ "$topdir/$topdir\_controller.swf",
+ "$topdir/$topdir\_embed.css",
+ "$topdir/$topdir\_First_Frame.png",
+ "$topdir/$topdir\_player.html",
+ "$topdir/$topdir\_Thumbnails.png",
+ "$topdir/playerProductInstall.swf",
+ "$topdir/scripts/",
+ "$topdir/scripts/config_xml.js",
+ "$topdir/scripts/techsmith-smart-player.min.js",
+ "$topdir/skins/",
+ "$topdir/skins/configuration_express.xml",
+ "$topdir/skins/express_show/",
+ "$topdir/skins/express_show/spritesheet.min.css",
+ "$topdir/skins/express_show/spritesheet.png",
+ "$topdir/skins/express_show/techsmith-smart-player.min.css");
+ my @diffs = &compare_arrays(\@paths,\@camtasia6);
+ if (@diffs == 0) {
+ $is_camtasia = 6;
+ } else {
+ @diffs = &compare_arrays(\@paths,\@camtasia8_1);
+ if (@diffs == 0) {
+ $is_camtasia = 8;
+ } else {
+ @diffs = &compare_arrays(\@paths,\@camtasia8_4);
+ if (@diffs == 0) {
+ $is_camtasia = 8;
+ }
+ }
+ }
+ }
+ my $output;
+ if ($is_camtasia) {
+ $output = <<"ENDCAM";
+
+
'.
+ &mt('Warning: decompression of the archive will overwrite the following items which already exist:').' '.
+ &start_data_table().
+ &start_data_table_header_row().
+ '
');
+ if (defined($$hash{$sample})) { $r->print($$hash{$sample}); }
+ $r->print('
');
+ }
+ $r->print(&end_data_table_row());
+ }
+ $r->print(&end_data_table().' '."\n");
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item * &csv_print_select_table($r,$records,$d)
+
+Prints a table to create associations between values and table columns.
+
+$r is an Apache Request ref,
+$records is an arrayref from &Apache::loncommon::upfile_record_sep,
+$d is an array of 2 element arrays (internal name, displayed name,defaultcol)
+
+=cut
+
+######################################################
+######################################################
+sub csv_print_select_table {
+ my ($r,$records,$d) = @_;
+ my $i=0;
+ my $samples = &get_samples($records,1);
+ $r->print(&mt('Associate columns with student attributes.')."\n".
+ &start_data_table().&start_data_table_header_row().
+ '
'.&mt('Attribute').'
'.
+ '
'.&mt('Column').'
'.
+ &end_data_table_header_row()."\n");
+ foreach my $array_ref (@$d) {
+ my ($value,$display,$defaultcol)=@{ $array_ref };
+ $r->print(&start_data_table_row().'
'.$display.'
');
+
+ $r->print('
'.&end_data_table_row()."\n");
+ $i++;
+ }
+ $r->print(&end_data_table());
+ $i--;
+ return $i;
+}
+
+######################################################
+######################################################
+
+=pod
+
+=item * &csv_samples_select_table($r,$records,$d)
+
+Prints a table of sample values from the upload and can make associate samples to internal names.
+
+$r is an Apache Request ref,
+$records is an arrayref from &Apache::loncommon::upfile_record_sep,
+$d is an array of 2 element arrays (internal name, displayed name)
+
+=cut
+
+######################################################
+######################################################
+sub csv_samples_select_table {
+ my ($r,$records,$d) = @_;
+ my $i=0;
+ #
+ my $max_samples = 5;
+ my $samples = &get_samples($records,$max_samples);
+ $r->print(&start_data_table().
+ &start_data_table_header_row().'
';
+ $itemcount ++;
+ }
+ if ($itemcount) {
+ $output = &Apache::loncommon::start_data_table().
+ $table.
+ &Apache::loncommon::end_data_table();
+ }
+ }
+ }
+ }
+ return $output;
+}
+
+=pod
+
+=item * &assign_category_rows()
+
+Create a datatable row for display of nested categories in a domain,
+with checkboxes to allow a course to be categorized,called recursively.
+
+Inputs:
+
+itemcount - track row number for alternating colors
+
+cats - reference to array of arrays/hashes which encapsulates hierarchy of
+ categories and subcategories.
+
+depth - current depth in hierarchy of categories and sub-categories - 0 indexed.
+
+parent - parent of current category item
+
+path - Array containing all categories back up through the hierarchy from the
+ current category to the top level.
+
+currcategories - reference to array of current categories assigned to the course
+
+disabled - scalar (optional) contains disabled="disabled" if input elements are
+ to be readonly (e.g., Domain Helpdesk role viewing course settings).
+
+Returns: $output (markup to be displayed).
+
+=cut
+
+sub assign_category_rows {
+ my ($itemcount,$cats,$depth,$parent,$path,$currcategories,$disabled) = @_;
+ my ($text,$name,$item,$chgstr);
+ if (ref($cats) eq 'ARRAY') {
+ my $maxdepth = scalar(@{$cats});
+ if (ref($cats->[$depth]) eq 'HASH') {
+ if (ref($cats->[$depth]{$parent}) eq 'ARRAY') {
+ my $numchildren = @{$cats->[$depth]{$parent}};
+ my $css_class = $itemcount%2?' class="LC_odd_row"':'';
+ $text .= '
';
+ for (my $j=0; $j<$numchildren; $j++) {
+ $name = $cats->[$depth]{$parent}[$j];
+ $item = &escape($name).':'.&escape($parent).':'.$depth;
+ my $deeper = $depth+1;
+ my $checked = '';
+ if (ref($currcategories) eq 'ARRAY') {
+ if (@{$currcategories} > 0) {
+ if (grep(/^\Q$item\E$/,@{$currcategories})) {
+ $checked = ' checked="checked"';
+ }
+ }
+ }
+ $text .= '
'."\n".''."\n";
+ return $jscript.$clonewarning.$output;
+}
+
+=pod
+
+=item * &timebased_select_form()
+
+Create markup for a dropdown list used to select a time-based
+filter e.g., Course Activity, Course Created, when searching for courses
+or communities
+
+Inputs:
+
+item - name of form element (sincefilter or createdfilter)
+
+filter - anonymous hash of criteria and their values
+
+Returns: HTML for a select box contained a blank, then six time selections,
+ with value set in incoming form variables currently selected.
+
+Side Effects: None
+
+=cut
+
+sub timebased_select_form {
+ my ($item,$filter) = @_;
+ if (ref($filter) eq 'HASH') {
+ $filter->{$item} =~ s/[^\d-]//g;
+ if (!$filter->{$item}) { $filter->{$item}=-1; }
+ return &select_form(
+ $filter->{$item},
+ $item,
+ { '-1' => '',
+ '86400' => &mt('today'),
+ '604800' => &mt('last week'),
+ '2592000' => &mt('last month'),
+ '7776000' => &mt('last three months'),
+ '15552000' => &mt('last six months'),
+ '31104000' => &mt('last year'),
+ 'select_form_order' =>
+ ['-1','86400','604800','2592000','7776000',
+ '15552000','31104000']});
+ }
+}
+
+=pod
+
+=item * &js_changer()
+
+Create script tag containing Javascript used to submit course search form
+when course type or domain is changed, and also to hide 'Searching ...' on
+page load completion for page showing search result.
+
+Inputs: None
+
+Returns: markup containing updateFilters() and hideSearching() javascript functions.
+
+Side Effects: None
+
+=cut
+
+sub js_changer {
+ return <
+//
+
+
+ENDJS
+}
+
+=pod
+
+=item * &search_courses()
+
+Process selected filters form course search form and pass to lonnet::courseiddump
+to retrieve a hash for which keys are courseIDs which match the selected filters.
+
+Inputs:
+
+dom - domain being searched
+
+type - course type ('Course' or 'Community' or '.' if any).
+
+filter - anonymous hash of criteria and their values
+
+numtitles - for institutional codes - number of categories
+
+cloneruname - optional username of new course owner
+
+clonerudom - optional domain of new course owner
+
+domcloner - optional "domcloner" flag; has value=1 if user has ccc priv in domain being filtered by,
+ (used when DC is using course creation form)
+
+codetitles - reference to array of titles of components in institutional codes (official courses).
+
+cc_clone - escaped comma separated list of courses for which course cloner has active CC role
+ (and so can clone automatically)
+
+reqcrsdom - domain of new course, where search_courses is used to identify potential courses to clone
+
+reqinstcode - institutional code of new course, where search_courses is used to identify potential
+ courses to clone
+
+Returns: %courses - hash of courses satisfying search criteria, keys = course IDs, values are corresponding colon-separated escaped description, institutional code, owner and type.
+
+
+Side Effects: None
+
+=cut
+
+
+sub search_courses {
+ my ($dom,$type,$filter,$numtitles,$cloneruname,$clonerudom,$domcloner,$codetitles,
+ $cc_clone,$reqcrsdom,$reqinstcode) = @_;
+ my (%courses,%showcourses,$cloner);
+ if (($filter->{'ownerfilter'} ne '') ||
+ ($filter->{'ownerdomfilter'} ne '')) {
+ $filter->{'combownerfilter'} = $filter->{'ownerfilter'}.':'.
+ $filter->{'ownerdomfilter'};
+ }
+ foreach my $item ('descriptfilter','coursefilter','combownerfilter') {
+ if (!$filter->{$item}) {
+ $filter->{$item}='.';
+ }
+ }
+ my $now = time;
+ my $timefilter =
+ ($filter->{'sincefilter'}==-1?1:$now-$filter->{'sincefilter'});
+ my ($createdbefore,$createdafter);
+ if (($filter->{'createdfilter'} ne '') && ($filter->{'createdfilter'} !=-1)) {
+ $createdbefore = $now;
+ $createdafter = $now-$filter->{'createdfilter'};
+ }
+ my ($instcodefilter,$regexpok);
+ if ($numtitles) {
+ if ($env{'form.official'} eq 'on') {
+ $instcodefilter =
+ &Apache::courseclassifier::instcode_search_str($dom,$numtitles,$codetitles);
+ $regexpok = 1;
+ } elsif ($env{'form.official'} eq 'off') {
+ $instcodefilter = &Apache::courseclassifier::instcode_search_str($dom,$numtitles,$codetitles);
+ unless ($instcodefilter eq '') {
+ $regexpok = -1;
+ }
+ }
+ } else {
+ $instcodefilter = $filter->{'instcodefilter'};
+ }
+ if ($instcodefilter eq '') { $instcodefilter = '.'; }
+ if ($type eq '') { $type = '.'; }
+
+ if (($clonerudom ne '') && ($cloneruname ne '')) {
+ $cloner = $cloneruname.':'.$clonerudom;
+ }
+ %courses = &Apache::lonnet::courseiddump($dom,
+ $filter->{'descriptfilter'},
+ $timefilter,
+ $instcodefilter,
+ $filter->{'combownerfilter'},
+ $filter->{'coursefilter'},
+ undef,undef,$type,$regexpok,undef,undef,
+ undef,undef,$cloner,$cc_clone,
+ $filter->{'cloneableonly'},
+ $createdbefore,$createdafter,undef,
+ $domcloner,undef,$reqcrsdom,$reqinstcode);
+ if (($filter->{'personfilter'} ne '') && ($filter->{'persondomfilter'} ne '')) {
+ my $ccrole;
+ if ($type eq 'Community') {
+ $ccrole = 'co';
+ } else {
+ $ccrole = 'cc';
+ }
+ my %rolehash = &Apache::lonnet::get_my_roles($filter->{'personfilter'},
+ $filter->{'persondomfilter'},
+ 'userroles',undef,
+ [$ccrole,'in','ad','ep','ta','cr'],
+ $dom);
+ foreach my $role (keys(%rolehash)) {
+ my ($cnum,$cdom,$courserole) = split(':',$role);
+ my $cid = $cdom.'_'.$cnum;
+ if (exists($courses{$cid})) {
+ if (ref($courses{$cid}) eq 'HASH') {
+ if (ref($courses{$cid}{roles}) eq 'ARRAY') {
+ if (!grep(/^\Q$courserole\E$/,@{$courses{$cid}{roles}})) {
+ push(@{$courses{$cid}{roles}},$courserole);
+ }
+ } else {
+ $courses{$cid}{roles} = [$courserole];
+ }
+ $showcourses{$cid} = $courses{$cid};
+ }
+ }
+ }
+ %courses = %showcourses;
+ }
+ return %courses;
+}
+
+=pod
+
+=back
+
+=head1 Routines for version requirements for current course.
+
+=over 4
+
+=item * &check_release_required()
+
+Compares required LON-CAPA version with version on server, and
+if required version is newer looks for a server with the required version.
+
+Looks first at servers in user's owen domain; if none suitable, looks at
+servers in course's domain are permitted to host sessions for user's domain.
+
+Inputs:
+
+$loncaparev - Version on current server (format: Major.Minor.Subrelease-datestamp)
+
+$courseid - Course ID of current course
+
+$rolecode - User's current role in course (for switchserver query string).
+
+$required - LON-CAPA version needed by course (format: Major.Minor).
+
+
+Returns:
+
+$switchserver - query string tp append to /adm/switchserver call (if
+ current server's LON-CAPA version is too old.
+
+$warning - Message is displayed if no suitable server could be found.
+
+=cut
+
+sub check_release_required {
+ my ($loncaparev,$courseid,$rolecode,$required) = @_;
+ my ($switchserver,$warning);
+ if ($required ne '') {
+ my ($reqdmajor,$reqdminor) = ($required =~ /^(\d+)\.(\d+)$/);
+ my ($major,$minor) = ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+ if ($reqdmajor ne '' && $reqdminor ne '') {
+ my $otherserver;
+ if (($major eq '' && $minor eq '') ||
+ (($reqdmajor > $major) || (($reqdmajor == $major) && ($reqdminor > $minor)))) {
+ my ($userdomserver) = &Apache::lonnet::choose_server($env{'user.domain'},undef,$required,1);
+ my $switchlcrev =
+ &Apache::lonnet::get_server_loncaparev($env{'user.domain'},
+ $userdomserver);
+ my ($swmajor,$swminor) = ($switchlcrev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+ if (($swmajor eq '' && $swminor eq '') || ($reqdmajor > $swmajor) ||
+ (($reqdmajor == $swmajor) && ($reqdminor > $swminor))) {
+ my $cdom = $env{'course.'.$courseid.'.domain'};
+ if ($cdom ne $env{'user.domain'}) {
+ my ($coursedomserver,$coursehostname) = &Apache::lonnet::choose_server($cdom,undef,$required,1);
+ my $serverhomeID = &Apache::lonnet::get_server_homeID($coursehostname);
+ my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+ my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
+ my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
+ my $remoterev = &Apache::lonnet::get_server_loncaparev($serverhomedom,$coursedomserver);
+ my $canhost =
+ &Apache::lonnet::can_host_session($env{'user.domain'},
+ $coursedomserver,
+ $remoterev,
+ $udomdefaults{'remotesessions'},
+ $defdomdefaults{'hostedsessions'});
+
+ if ($canhost) {
+ $otherserver = $coursedomserver;
+ } else {
+ $warning = &mt('Requires LON-CAPA version [_1].',$env{'course.'.$courseid.'.internal.releaserequired'}).' '. &mt("No suitable server could be found amongst servers in either your own domain or in the course's domain.");
+ }
+ } else {
+ $warning = &mt('Requires LON-CAPA version [_1].',$env{'course.'.$courseid.'.internal.releaserequired'}).' '.&mt("No suitable server could be found amongst servers in your own domain (which is also the course's domain).");
+ }
+ } else {
+ $otherserver = $userdomserver;
+ }
+ }
+ if ($otherserver ne '') {
+ $switchserver = 'otherserver='.$otherserver.'&role='.$rolecode;
+ }
+ }
+ }
+ return ($switchserver,$warning);
+}
+
+=pod
+
+=item * &check_release_result()
+
+Inputs:
+
+$switchwarning - Warning message if no suitable server found to host session.
+
+$switchserver - query string to append to /adm/switchserver containing lonHostID
+ and current role.
+
+Returns: HTML to display with information about requirement to switch server.
+ Either displaying warning with link to Roles/Courses screen or
+ display link to switchserver.
+
+=cut
+
+sub check_release_result {
+ my ($switchwarning,$switchserver) = @_;
+ my $output = &start_page('Selected course unavailable on this server').
+ '
'.&end_page();
+ return $output;
+}
+
+=pod
+
+=item * &needs_coursereinit()
+
+Determine if course contents stored for user's session needs to be
+refreshed, because content has changed since "Big Hash" last tied.
+
+Check for change is made if time last checked is more than 10 minutes ago
+(by default).
+
+Inputs:
+
+$loncaparev - Version on current server (format: Major.Minor.Subrelease-datestamp)
+
+$interval (optional) - Time which may elapse (in s) between last check for content
+ change in current course. (default: 600 s).
+
+Returns: an array; first element is:
+
+=over 4
+
+'switch' - if content updates mean user's session
+ needs to be switched to a server running a newer LON-CAPA version
+
+'update' - if course session needs to be refreshed (i.e., Big Hash needs to be reloaded)
+ on current server hosting user's session
+
+'' - if no action required.
+
+=back
+
+If first item element is 'switch':
+
+second item is $switchwarning - Warning message if no suitable server found to host session.
+
+third item is $switchserver - query string to append to /adm/switchserver containing lonHostID
+ and current role.
+
+otherwise: no other elements returned.
+
+=back
+
+=cut
+
+sub needs_coursereinit {
+ my ($loncaparev,$interval) = @_;
+ return() unless ($env{'request.course.id'} && $env{'request.course.tied'});
+ my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+ my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+ my $now = time;
+ if ($interval eq '') {
+ $interval = 600;
+ }
+ if (($now-$env{'request.course.timechecked'})>$interval) {
+ &Apache::lonnet::appenv({'request.course.timechecked'=>$now});
+ my $blocked = &blocking_status('reinit',undef,$cnum,$cdom,undef,1);
+ if ($blocked) {
+ return ();
+ }
+ my $lastchange = &Apache::lonnet::get_coursechange($cdom,$cnum);
+ if ($lastchange > $env{'request.course.tied'}) {
+ my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
+ if ($curr_reqd_hash{'internal.releaserequired'} ne '') {
+ my $required = $env{'course.'.$cdom.'_'.$cnum.'.internal.releaserequired'};
+ if ($curr_reqd_hash{'internal.releaserequired'} ne $required) {
+ &Apache::lonnet::appenv({'course.'.$cdom.'_'.$cnum.'.internal.releaserequired' =>
+ $curr_reqd_hash{'internal.releaserequired'}});
+ my ($switchserver,$switchwarning) =
+ &check_release_required($loncaparev,$cdom.'_'.$cnum,$env{'request.role'},
+ $curr_reqd_hash{'internal.releaserequired'});
+ if ($switchwarning ne '' || $switchserver ne '') {
+ return ('switch',$switchwarning,$switchserver);
+ }
+ }
+ }
+ return ('update');
+ }
+ }
+ return ();
+}
+
+sub update_content_constraints {
+ my ($cdom,$cnum,$chome,$cid,$keeporder) = @_;
+ my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
+ my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'});
+ my (%checkresponsetypes,%checkcrsrestypes);
+ foreach my $key (keys(%Apache::lonnet::needsrelease)) {
+ my ($item,$name,$value) = split(/:/,$key);
+ if ($item eq 'resourcetag') {
+ if ($name eq 'responsetype') {
+ $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key}
+ }
+ } elsif ($item eq 'course') {
+ if ($name eq 'courserestype') {
+ $checkcrsrestypes{$value} = $Apache::lonnet::needsrelease{$key};
+ }
+ }
+ }
+ my $navmap = Apache::lonnavmaps::navmap->new();
+ if (defined($navmap)) {
+ my (%allresponses,%allcrsrestypes);
+ foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0)) {
+ if ($res->is_tool()) {
+ if ($allcrsrestypes{'exttool'}) {
+ $allcrsrestypes{'exttool'} ++;
+ } else {
+ $allcrsrestypes{'exttool'} = 1;
+ }
+ next;
+ }
+ my %responses = $res->responseTypes();
+ foreach my $key (keys(%responses)) {
+ next unless(exists($checkresponsetypes{$key}));
+ $allresponses{$key} += $responses{$key};
+ }
+ }
+ foreach my $key (keys(%allresponses)) {
+ my ($major,$minor) = split(/\./,$checkresponsetypes{$key});
+ if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+ ($reqdmajor,$reqdminor) = ($major,$minor);
+ }
+ }
+ foreach my $key (keys(%allcrsrestypes)) {
+ my ($major,$minor) = split(/\./,$checkcrsrestypes{$key});
+ if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+ ($reqdmajor,$reqdminor) = ($major,$minor);
+ }
+ }
+ undef($navmap);
+ }
+ my (@resources,@order,@resparms,@zombies);
+ if ($keeporder) {
+ use LONCAPA::map;
+ @resources = @LONCAPA::map::resources;
+ @order = @LONCAPA::map::order;
+ @resparms = @LONCAPA::map::resparms;
+ @zombies = @LONCAPA::map::zombies;
+ }
+ my $suppmap = 'supplemental.sequence';
+ my ($suppcount,$supptools,$errors) = (0,0,0);
+ ($suppcount,$supptools,$errors) = &recurse_supplemental($cnum,$cdom,$suppmap,
+ $suppcount,$supptools,$errors);
+ if ($keeporder) {
+ @LONCAPA::map::resources = @resources;
+ @LONCAPA::map::order = @order;
+ @LONCAPA::map::resparms = @resparms;
+ @LONCAPA::map::zombies = @zombies;
+ }
+ if ($supptools) {
+ my ($major,$minor) = split(/\./,$checkcrsrestypes{'exttool'});
+ if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+ ($reqdmajor,$reqdminor) = ($major,$minor);
+ }
+ }
+ unless (($reqdmajor eq '') && ($reqdminor eq '')) {
+ &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid);
+ }
+ return;
+}
+
+sub allmaps_incourse {
+ my ($cdom,$cnum,$chome,$cid) = @_;
+ if ($cdom eq '' || $cnum eq '' || $chome eq '' || $cid eq '') {
+ $cid = $env{'request.course.id'};
+ $cdom = $env{'course.'.$cid.'.domain'};
+ $cnum = $env{'course.'.$cid.'.num'};
+ $chome = $env{'course.'.$cid.'.home'};
+ }
+ my %allmaps = ();
+ my $lastchange =
+ &Apache::lonnet::get_coursechange($cdom,$cnum);
+ if ($lastchange > $env{'request.course.tied'}) {
+ my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum");
+ unless ($ferr) {
+ &update_content_constraints($cdom,$cnum,$chome,$cid,1);
+ }
+ }
+ my $navmap = Apache::lonnavmaps::navmap->new();
+ if (defined($navmap)) {
+ foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_map() },1,0,1)) {
+ $allmaps{$res->src()} = 1;
+ }
+ }
+ return \%allmaps;
+}
+
+sub parse_supplemental_title {
+ my ($title) = @_;
+
+ my ($foldertitle,$renametitle);
+ if ($title =~ /&&&/) {
+ $title = &HTML::Entites::decode($title);
+ }
+ if ($title =~ m/^(\d+)___&&&___($match_username)___&&&___($match_domain)___&&&___(.*)$/) {
+ $renametitle=$4;
+ my ($time,$uname,$udom) = ($1,$2,$3);
+ $foldertitle=&Apache::lontexconvert::msgtexconverted($4);
+ my $name = &plainname($uname,$udom);
+ $name = &HTML::Entities::encode($name,'"<>&\'');
+ $renametitle = &HTML::Entities::encode($renametitle,'"<>&\'');
+ $title=''.&Apache::lonlocal::locallocaltime($time).' '.
+ $name.': '.$foldertitle;
+ }
+ if (wantarray) {
+ return ($title,$foldertitle,$renametitle);
+ }
+ return $title;
+}
+
+sub recurse_supplemental {
+ my ($cnum,$cdom,$suppmap,$numfiles,$numexttools,$errors) = @_;
+ if ($suppmap) {
+ my ($errtext,$fatal) = &LONCAPA::map::mapread('/uploaded/'.$cdom.'/'.$cnum.'/'.$suppmap);
+ if ($fatal) {
+ $errors ++;
+ } else {
+ my @order = @LONCAPA::map::order;
+ if (@order > 0) {
+ my @resources = @LONCAPA::map::resources;
+ foreach my $idx (@order) {
+ my ($title,$src,$ext,$type,$status)=split(/\:/,$resources[$idx]);
+ if (($src ne '') && ($status eq 'res')) {
+ if ($src =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental_\d+\.sequence)$}) {
+ ($numfiles,$numexttools,$errors) = &recurse_supplemental($cnum,$cdom,$1,
+ $numfiles,$numexttools,$errors);
+ } else {
+ if ($src =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) {
+ $numexttools ++;
+ }
+ $numfiles ++;
+ }
+ }
+ }
+ }
+ }
+ }
+ return ($numfiles,$numexttools,$errors);
+}
+
+sub symb_to_docspath {
+ my ($symb,$navmapref) = @_;
+ return unless ($symb && ref($navmapref));
+ my ($mapurl,$id,$resurl) = &Apache::lonnet::decode_symb($symb);
+ if ($resurl=~/\.(sequence|page)$/) {
+ $mapurl=$resurl;
+ } elsif ($resurl eq 'adm/navmaps') {
+ $mapurl=$env{'course.'.$env{'request.course.id'}.'.url'};
+ }
+ my $mapresobj;
+ unless (ref($$navmapref)) {
+ $$navmapref = Apache::lonnavmaps::navmap->new();
+ }
+ if (ref($$navmapref)) {
+ $mapresobj = $$navmapref->getResourceByUrl($mapurl);
+ }
+ $mapurl=~s{^.*/([^/]+)\.(\w+)$}{$1};
+ my $type=$2;
+ my $path;
+ if (ref($mapresobj)) {
+ my $pcslist = $mapresobj->map_hierarchy();
+ if ($pcslist ne '') {
+ foreach my $pc (split(/,/,$pcslist)) {
+ next if ($pc <= 1);
+ my $res = $$navmapref->getByMapPc($pc);
+ if (ref($res)) {
+ my $thisurl = $res->src();
+ $thisurl=~s{^.*/([^/]+)\.\w+$}{$1};
+ my $thistitle = $res->title();
+ $path .= '&'.
+ &Apache::lonhtmlcommon::entity_encode($thisurl).'&'.
+ &escape($thistitle).
+ ':'.$res->randompick().
+ ':'.$res->randomout().
+ ':'.$res->encrypted().
+ ':'.$res->randomorder().
+ ':'.$res->is_page();
+ }
+ }
+ }
+ $path =~ s/^\&//;
+ my $maptitle = $mapresobj->title();
+ if ($mapurl eq 'default') {
+ $maptitle = 'Main Content';
+ }
+ $path .= (($path ne '')? '&' : '').
+ &Apache::lonhtmlcommon::entity_encode($mapurl).'&'.
+ &escape($maptitle).
+ ':'.$mapresobj->randompick().
+ ':'.$mapresobj->randomout().
+ ':'.$mapresobj->encrypted().
+ ':'.$mapresobj->randomorder().
+ ':'.$mapresobj->is_page();
+ } else {
+ my $maptitle = &Apache::lonnet::gettitle($mapurl);
+ my $ispage = (($type eq 'page')? 1 : '');
+ if ($mapurl eq 'default') {
+ $maptitle = 'Main Content';
+ }
+ $path = &Apache::lonhtmlcommon::entity_encode($mapurl).'&'.
+ &escape($maptitle).':::::'.$ispage;
+ }
+ unless ($mapurl eq 'default') {
+ $path = 'default&'.
+ &escape('Main Content').
+ ':::::&'.$path;
+ }
+ return $path;
+}
+
+sub captcha_display {
+ my ($context,$lonhost,$defdom) = @_;
+ my ($output,$error);
+ my ($captcha,$pubkey,$privkey,$version) =
+ &get_captcha_config($context,$lonhost,$defdom);
+ if ($captcha eq 'original') {
+ $output = &create_captcha();
+ unless ($output) {
+ $error = 'captcha';
+ }
+ } elsif ($captcha eq 'recaptcha') {
+ $output = &create_recaptcha($pubkey,$version);
+ unless ($output) {
+ $error = 'recaptcha';
+ }
+ }
+ return ($output,$error,$captcha,$version);
+}
+
+sub captcha_response {
+ my ($context,$lonhost,$defdom) = @_;
+ my ($captcha_chk,$captcha_error);
+ my ($captcha,$pubkey,$privkey,$version) = &get_captcha_config($context,$lonhost,$defdom);
+ if ($captcha eq 'original') {
+ ($captcha_chk,$captcha_error) = &check_captcha();
+ } elsif ($captcha eq 'recaptcha') {
+ $captcha_chk = &check_recaptcha($privkey,$version);
+ } else {
+ $captcha_chk = 1;
+ }
+ return ($captcha_chk,$captcha_error);
+}
+
+sub get_captcha_config {
+ my ($context,$lonhost,$dom_in_effect) = @_;
+ my ($captcha,$pubkey,$privkey,$version,$hashtocheck);
+ my $hostname = &Apache::lonnet::hostname($lonhost);
+ my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
+ my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+ if ($context eq 'usercreation') {
+ my %domconfig = &Apache::lonnet::get_dom('configuration',[$context],$serverhomedom);
+ if (ref($domconfig{$context}) eq 'HASH') {
+ $hashtocheck = $domconfig{$context}{'cancreate'};
+ if (ref($hashtocheck) eq 'HASH') {
+ if ($hashtocheck->{'captcha'} eq 'recaptcha') {
+ if (ref($hashtocheck->{'recaptchakeys'}) eq 'HASH') {
+ $pubkey = $hashtocheck->{'recaptchakeys'}{'public'};
+ $privkey = $hashtocheck->{'recaptchakeys'}{'private'};
+ }
+ if ($privkey && $pubkey) {
+ $captcha = 'recaptcha';
+ $version = $hashtocheck->{'recaptchaversion'};
+ if ($version ne '2') {
+ $version = 1;
+ }
+ } else {
+ $captcha = 'original';
+ }
+ } elsif ($hashtocheck->{'captcha'} ne 'notused') {
+ $captcha = 'original';
+ }
+ }
+ } else {
+ $captcha = 'captcha';
+ }
+ } elsif ($context eq 'login') {
+ my %domconfhash = &Apache::loncommon::get_domainconf($serverhomedom);
+ if ($domconfhash{$serverhomedom.'.login.captcha'} eq 'recaptcha') {
+ $pubkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_public'};
+ $privkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_private'};
+ if ($privkey && $pubkey) {
+ $captcha = 'recaptcha';
+ $version = $domconfhash{$serverhomedom.'.login.recaptchaversion'};
+ if ($version ne '2') {
+ $version = 1;
+ }
+ } else {
+ $captcha = 'original';
+ }
+ } elsif ($domconfhash{$serverhomedom.'.login.captcha'} eq 'original') {
+ $captcha = 'original';
+ }
+ } elsif ($context eq 'passwords') {
+ if ($dom_in_effect) {
+ my %passwdconf = &Apache::lonnet::get_passwdconf($dom_in_effect);
+ if ($passwdconf{'captcha'} eq 'recaptcha') {
+ if (ref($passwdconf{'recaptchakeys'}) eq 'HASH') {
+ $pubkey = $passwdconf{'recaptchakeys'}{'public'};
+ $privkey = $passwdconf{'recaptchakeys'}{'private'};
+ }
+ if ($privkey && $pubkey) {
+ $captcha = 'recaptcha';
+ $version = $passwdconf{'recaptchaversion'};
+ if ($version ne '2') {
+ $version = 1;
+ }
+ } else {
+ $captcha = 'original';
+ }
+ } elsif ($passwdconf{'captcha'} ne 'notused') {
+ $captcha = 'original';
+ }
+ }
+ }
+ return ($captcha,$pubkey,$privkey,$version);
+}
+
+sub create_captcha {
+ my %captcha_params = &captcha_settings();
+ my ($output,$maxtries,$tries) = ('',10,0);
+ while ($tries < $maxtries) {
+ $tries ++;
+ my $captcha = Authen::Captcha->new (
+ output_folder => $captcha_params{'output_dir'},
+ data_folder => $captcha_params{'db_dir'},
+ );
+ my $md5sum = $captcha->generate_code($captcha_params{'numchars'});
+
+ if (-e $Apache::lonnet::perlvar{'lonCaptchaDir'}.'/'.$md5sum.'.png') {
+ $output = ''."\n".
+ ''.
+ &mt('Type in the letters/numbers shown below').' '.
+ ''.
+ ' '.
+ '';
+ last;
+ }
+ }
+ if ($output eq '') {
+ &Apache::lonnet::logthis("Failed to create Captcha code after $tries attempts.");
+ }
+ return $output;
+}
+
+sub captcha_settings {
+ my %captcha_params = (
+ output_dir => $Apache::lonnet::perlvar{'lonCaptchaDir'},
+ www_output_dir => "/captchaspool",
+ db_dir => $Apache::lonnet::perlvar{'lonCaptchaDb'},
+ numchars => '5',
+ );
+ return %captcha_params;
+}
+
+sub check_captcha {
+ my ($captcha_chk,$captcha_error);
+ my $code = $env{'form.code'};
+ my $md5sum = $env{'form.crypt'};
+ my %captcha_params = &captcha_settings();
+ my $captcha = Authen::Captcha->new(
+ output_folder => $captcha_params{'output_dir'},
+ data_folder => $captcha_params{'db_dir'},
+ );
+ $captcha_chk = $captcha->check_code($code,$md5sum);
+ my %captcha_hash = (
+ 0 => 'Code not checked (file error)',
+ -1 => 'Failed: code expired',
+ -2 => 'Failed: invalid code (not in database)',
+ -3 => 'Failed: invalid code (code does not match crypt)',
+ );
+ if ($captcha_chk != 1) {
+ $captcha_error = $captcha_hash{$captcha_chk}
+ }
+ return ($captcha_chk,$captcha_error);
+}
+
+sub create_recaptcha {
+ my ($pubkey,$version) = @_;
+ if ($version >= 2) {
+ return ''.
+ '';
+ } else {
+ my $use_ssl;
+ if ($ENV{'SERVER_PORT'} == 443) {
+ $use_ssl = 1;
+ }
+ my $captcha = Captcha::reCAPTCHA->new;
+ return $captcha->get_options_setter({theme => 'white'})."\n".
+ $captcha->get_html($pubkey,undef,$use_ssl).
+ &mt('If the text is hard to read, [_1] will replace them.',
+ '').
+ '
';
+ }
+}
+
+sub check_recaptcha {
+ my ($privkey,$version) = @_;
+ my $captcha_chk;
+ my $ip = &Apache::lonnet::get_requestor_ip();
+ if ($version >= 2) {
+ my %info = (
+ secret => $privkey,
+ response => $env{'form.g-recaptcha-response'},
+ remoteip => $ip,
+ );
+ my $request=new HTTP::Request('POST','https://www.google.com/recaptcha/api/siteverify');
+ $request->content(join('&',map {
+ my $name = escape($_);
+ "$name=" . ( ref($info{$_}) eq 'ARRAY'
+ ? join("&$name=", map {escape($_) } @{$info{$_}})
+ : &escape($info{$_}) );
+ } keys(%info)));
+ my $response = &LONCAPA::LWPReq::makerequest('',$request,'','',10,1);
+ if ($response->is_success) {
+ my $data = JSON::DWIW->from_json($response->decoded_content);
+ if (ref($data) eq 'HASH') {
+ if ($data->{'success'}) {
+ $captcha_chk = 1;
+ }
+ }
+ }
+ } else {
+ my $captcha = Captcha::reCAPTCHA->new;
+ my $captcha_result =
+ $captcha->check_answer(
+ $privkey,
+ $ip,
+ $env{'form.recaptcha_challenge_field'},
+ $env{'form.recaptcha_response_field'},
+ );
+ if ($captcha_result->{is_valid}) {
+ $captcha_chk = 1;
+ }
+ }
+ return $captcha_chk;
+}
+
+sub emailusername_info {
+ my @fields = ('firstname','lastname','institution','web','location','officialemail','id');
+ my %titles = &Apache::lonlocal::texthash (
+ lastname => 'Last Name',
+ firstname => 'First Name',
+ institution => 'School/college/university',
+ location => "School's city, state/province, country",
+ web => "School's web address",
+ officialemail => 'E-mail address at institution (if different)',
+ id => 'Student/Employee ID',
+ );
+ return (\@fields,\%titles);
+}
+
+sub cleanup_html {
+ my ($incoming) = @_;
+ my $outgoing;
+ if ($incoming ne '') {
+ $outgoing = $incoming;
+ $outgoing =~ s/;/;/g;
+ $outgoing =~ s/\#/#/g;
+ $outgoing =~ s/\&/&/g;
+ $outgoing =~ s/</g;
+ $outgoing =~ s/>/>/g;
+ $outgoing =~ s/\(/(/g;
+ $outgoing =~ s/\)/)/g;
+ $outgoing =~ s/"/"/g;
+ $outgoing =~ s/'/'/g;
+ $outgoing =~ s/\$/$/g;
+ $outgoing =~ s{/}{/}g;
+ $outgoing =~ s/=/=/g;
+ $outgoing =~ s/\\/\/g
+ }
+ return $outgoing;
+}
+
+# Checks for critical messages and returns a redirect url if one exists.
+# $interval indicates how often to check for messages.
+# $context is the calling context -- roles, grades, contents, menu or flip.
+sub critical_redirect {
+ my ($interval,$context) = @_;
+ unless (($env{'user.domain'} ne '') && ($env{'user.name'} ne '')) {
+ return ();
+ }
+ if ((time-$env{'user.criticalcheck.time'})>$interval) {
+ if (($env{'request.course.id'}) && (($context eq 'flip') || ($context eq 'contents'))) {
+ my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+ my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+ my $blocked = &blocking_status('alert',undef,$cnum,$cdom,undef,1);
+ if ($blocked) {
+ my $checkrole = "cm./$cdom/$cnum";
+ if ($env{'request.course.sec'} ne '') {
+ $checkrole .= "/$env{'request.course.sec'}";
+ }
+ unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
+ ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) {
+ return;
+ }
+ }
+ }
+ my @what=&Apache::lonnet::dump('critical', $env{'user.domain'},
+ $env{'user.name'});
+ &Apache::lonnet::appenv({'user.criticalcheck.time'=>time});
+ my $redirecturl;
+ if ($what[0]) {
+ if (($what[0] ne 'con_lost') && ($what[0] ne 'no_such_host') && ($what[0]!~/^error\:/)) {
+ $redirecturl='/adm/email?critical=display';
+ my $url=&Apache::lonnet::absolute_url().$redirecturl;
+ return (1, $url);
+ }
+ }
+ }
+ return ();
+}
+
+# Use:
+# my $answer=reply("encrypt:passwd:$udom:$uname:$upass",$tryserver);
+#
+##################################################
+# password associated functions #
+##################################################
+sub des_keys {
+ # Make a new key for DES encryption.
+ # Each key has two parts which are returned separately.
+ # Please note: Each key must be passed through the &hex function
+ # before it is output to the web browser. The hex versions cannot
+ # be used to decrypt.
+ my @hexstr=('0','1','2','3','4','5','6','7',
+ '8','9','a','b','c','d','e','f');
+ my $lkey='';
+ for (0..7) {
+ $lkey.=$hexstr[rand(15)];
+ }
+ my $ukey='';
+ for (0..7) {
+ $ukey.=$hexstr[rand(15)];
+ }
+ return ($lkey,$ukey);
+}
+
+sub des_decrypt {
+ my ($key,$cyphertext) = @_;
+ my $keybin=pack("H16",$key);
+ my $cypher;
+ if ($Crypt::DES::VERSION>=2.03) {
+ $cypher=new Crypt::DES $keybin;
+ } else {
+ $cypher=new DES $keybin;
+ }
+ my $plaintext='';
+ my $cypherlength = length($cyphertext);
+ my $numchunks = int($cypherlength/32);
+ for (my $j=0; $j<$numchunks; $j++) {
+ my $start = $j*32;
+ my $cypherblock = substr($cyphertext,$start,32);
+ my $chunk =
+ $cypher->decrypt(unpack("a8",pack("H16",substr($cypherblock,0,16))));
+ $chunk .=
+ $cypher->decrypt(unpack("a8",pack("H16",substr($cypherblock,16,16))));
+ $chunk=substr($chunk,1,ord(substr($chunk,0,1)) );
+ $plaintext .= $chunk;
+ }
+ return $plaintext;
+}
+
+sub get_requested_shorturls {
+ my ($cdom,$cnum,$navmap) = @_;
+ return unless (ref($navmap));
+ my ($numnew,$errors);
+ my @toshorten = &Apache::loncommon::get_env_multiple('form.addtiny');
+ if (@toshorten) {
+ my (%maps,%resources,%titles);
+ &Apache::loncourserespicker::enumerate_course_contents($navmap,\%maps,\%resources,\%titles,
+ 'shorturls',$cdom,$cnum);
+ if (keys(%resources)) {
+ my %tocreate;
+ foreach my $item (sort {$a <=> $b} (@toshorten)) {
+ my $symb = $resources{$item};
+ if ($symb) {
+ $tocreate{$cnum.'&'.$symb} = 1;
+ }
+ }
+ if (keys(%tocreate)) {
+ ($numnew,$errors) = &make_short_symbs($cdom,$cnum,
+ \%tocreate);
+ }
+ }
+ }
+ return ($numnew,$errors);
+}
+
+sub make_short_symbs {
+ my ($cdom,$cnum,$tocreateref,$lockuser) = @_;
+ my ($numnew,@errors);
+ if (ref($tocreateref) eq 'HASH') {
+ my %tocreate = %{$tocreateref};
+ if (keys(%tocreate)) {
+ my %coursetiny = &Apache::lonnet::dump('tiny',$cdom,$cnum);
+ my $su = Short::URL->new(no_vowels => 1);
+ my $init = '';
+ my (%newunique,%addcourse,%courseonly,%failed);
+ # get lock on tiny db
+ my $now = time;
+ if ($lockuser eq '') {
+ $lockuser = $env{'user.name'}.':'.$env{'user.domain'};
+ }
+ my $lockhash = {
+ "lock\0$now" => $lockuser,
+ };
+ my $tries = 0;
+ my $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
+ my ($code,$error);
+ while (($gotlock ne 'ok') && ($tries<3)) {
+ $tries ++;
+ sleep 1;
+ $gotlock = &Apache::lonnet::newput_dom('tiny',$lockhash,$cdom);
+ }
+ if ($gotlock eq 'ok') {
+ $init = &shorten_symbs($cdom,$init,$su,\%coursetiny,\%tocreate,\%newunique,
+ \%addcourse,\%courseonly,\%failed);
+ if (keys(%failed)) {
+ my $numfailed = scalar(keys(%failed));
+ push(@errors,&mt('error: could not obtain unique six character URL for [quant,_1,resource]',$numfailed));
+ }
+ if (keys(%newunique)) {
+ my $putres = &Apache::lonnet::newput_dom('tiny',\%newunique,$cdom);
+ if ($putres eq 'ok') {
+ $numnew = scalar(keys(%newunique));
+ my $newputres = &Apache::lonnet::newput('tiny',\%addcourse,$cdom,$cnum);
+ unless ($newputres eq 'ok') {
+ push(@errors,&mt('error: could not store course look-up of short URLs'));
+ }
+ } else {
+ push(@errors,&mt('error: could not store unique six character URLs'));
+ }
+ }
+ my $dellockres = &Apache::lonnet::del_dom('tiny',["lock\0$now"],$cdom);
+ unless ($dellockres eq 'ok') {
+ push(@errors,&mt('error: could not release lockfile'));
+ }
+ } else {
+ push(@errors,&mt('error: could not obtain lockfile'));
+ }
+ if (keys(%courseonly)) {
+ my $result = &Apache::lonnet::newput('tiny',\%courseonly,$cdom,$cnum);
+ if ($result ne 'ok') {
+ push(@errors,&mt('error: could not update course look-up of short URLs'));
+ }
+ }
+ }
+ }
+ return ($numnew,\@errors);
+}
+
+sub shorten_symbs {
+ my ($cdom,$init,$su,$coursetiny,$tocreate,$newunique,$addcourse,$courseonly,$failed) = @_;
+ return unless ((ref($su)) && (ref($coursetiny) eq 'HASH') && (ref($tocreate) eq 'HASH') &&
+ (ref($newunique) eq 'HASH') && (ref($addcourse) eq 'HASH') &&
+ (ref($courseonly) eq 'HASH') && (ref($failed) eq 'HASH'));
+ my (%possibles,%collisions);
+ foreach my $key (keys(%{$tocreate})) {
+ my $num = String::CRC32::crc32($key);
+ my $tiny = $su->encode($num,$init);
+ if ($tiny) {
+ $possibles{$tiny} = $key;
+ }
+ }
+ if (!$init) {
+ $init = 1;
+ } else {
+ $init ++;
+ }
+ if (keys(%possibles)) {
+ my @posstiny = keys(%possibles);
+ my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
+ my %currtiny = &Apache::lonnet::get('tiny',\@posstiny,$cdom,$configuname);
+ if (keys(%currtiny)) {
+ foreach my $key (keys(%currtiny)) {
+ next if ($currtiny{$key} eq '');
+ if ($currtiny{$key} eq $possibles{$key}) {
+ my ($tcnum,$tsymb) = split(/\&/,$currtiny{$key});
+ unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
+ $courseonly->{$tsymb} = $key;
+ }
+ } else {
+ $collisions{$possibles{$key}} = 1;
+ }
+ delete($possibles{$key});
+ }
+ }
+ foreach my $key (keys(%possibles)) {
+ $newunique->{$key} = $possibles{$key};
+ my ($tcnum,$tsymb) = split(/\&/,$possibles{$key});
+ unless (($coursetiny->{$tsymb} eq $key) || ($addcourse->{$tsymb} eq $key) || ($courseonly->{$tsymb} eq $key)) {
+ $addcourse->{$tsymb} = $key;
+ }
+ }
+ }
+ if (keys(%collisions)) {
+ if ($init <5) {
+ if (!$init) {
+ $init = 1;
+ } else {
+ $init ++;
+ }
+ $init = &shorten_symbs($cdom,$init,$su,$coursetiny,\%collisions,
+ $newunique,$addcourse,$courseonly,$failed);
+ } else {
+ foreach my $key (keys(%collisions)) {
+ $failed->{$key} = 1;
+ }
+ }
+ }
+ return $init;
+}
+
+sub is_nonframeable {
+ my ($url,$absolute,$hostname,$ip,$nocache) = @_;
+ my ($remprotocol,$remhost) = ($url =~ m{^(https?)\://(([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,})}i);
+ return if (($remprotocol eq '') || ($remhost eq ''));
+
+ $remprotocol = lc($remprotocol);
+ $remhost = lc($remhost);
+ my $remport = 80;
+ if ($remprotocol eq 'https') {
+ $remport = 443;
+ }
+ my ($result,$cached) = &Apache::lonnet::is_cached_new('noiframe',$remhost.':'.$remport);
+ if ($cached) {
+ unless ($nocache) {
+ if ($result) {
+ return 1;
+ } else {
+ return 0;
+ }
+ }
+ }
+ my $uselink;
+ my $request = new HTTP::Request('HEAD',$url);
+ my $response = &LONCAPA::LWPReq::makerequest('',$request,'','',5);
+ if ($response->is_success()) {
+ my $secpolicy = lc($response->header('content-security-policy'));
+ my $xframeop = lc($response->header('x-frame-options'));
+ $secpolicy =~ s/^\s+|\s+$//g;
+ $xframeop =~ s/^\s+|\s+$//g;
+ if (($secpolicy ne '') || ($xframeop ne '')) {
+ my $remotehost = $remprotocol.'://'.$remhost;
+ my ($origin,$protocol,$port);
+ if ($ENV{'SERVER_PORT'} =~/^\d+$/) {
+ $port = $ENV{'SERVER_PORT'};
+ } else {
+ $port = 80;
+ }
+ if ($absolute eq '') {
+ $protocol = 'http:';
+ if ($port == 443) {
+ $protocol = 'https:';
+ }
+ $origin = $protocol.'//'.lc($hostname);
+ } else {
+ $origin = lc($absolute);
+ ($protocol,$hostname) = ($absolute =~ m{^(https?:)//([^/]+)$});
+ }
+ if (($secpolicy) && ($secpolicy =~ /\Qframe-ancestors\E([^;]*)(;|$)/)) {
+ my $framepolicy = $1;
+ $framepolicy =~ s/^\s+|\s+$//g;
+ my @policies = split(/\s+/,$framepolicy);
+ if (@policies) {
+ if (grep(/^\Q'none'\E$/,@policies)) {
+ $uselink = 1;
+ } else {
+ $uselink = 1;
+ if ((grep(/^\Q*\E$/,@policies)) || (grep(/^\Q$protocol\E$/,@policies)) ||
+ (($origin ne '') && (grep(/^\Q$origin\E$/,@policies))) ||
+ (($ip ne '') && (grep(/^\Q$ip\E$/,@policies)))) {
+ undef($uselink);
+ }
+ if ($uselink) {
+ if (grep(/^\Q'self'\E$/,@policies)) {
+ if (($origin ne '') && ($remotehost eq $origin)) {
+ undef($uselink);
+ }
+ }
+ }
+ if ($uselink) {
+ my @possok;
+ if ($ip ne '') {
+ push(@possok,$ip);
+ }
+ my $hoststr = '';
+ foreach my $part (reverse(split(/\./,$hostname))) {
+ if ($hoststr eq '') {
+ $hoststr = $part;
+ } else {
+ $hoststr = "$part.$hoststr";
+ }
+ if ($hoststr eq $hostname) {
+ push(@possok,$hostname);
+ } else {
+ push(@possok,"*.$hoststr");
+ }
+ }
+ if (@possok) {
+ foreach my $poss (@possok) {
+ last if (!$uselink);
+ foreach my $policy (@policies) {
+ if ($policy =~ m{^(\Q$protocol\E//|)\Q$poss\E(\Q:$port\E|)$}) {
+ undef($uselink);
+ last;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ } elsif ($xframeop ne '') {
+ $uselink = 1;
+ my @policies = split(/\s*,\s*/,$xframeop);
+ if (@policies) {
+ unless (grep(/^deny$/,@policies)) {
+ if ($origin ne '') {
+ if (grep(/^sameorigin$/,@policies)) {
+ if ($remotehost eq $origin) {
+ undef($uselink);
+ }
+ }
+ if ($uselink) {
+ foreach my $policy (@policies) {
+ if ($policy =~ /^allow-from\s*(.+)$/) {
+ my $allowfrom = $1;
+ if (($allowfrom ne '') && ($allowfrom eq $origin)) {
+ undef($uselink);
+ last;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ if ($nocache) {
+ if ($cached) {
+ my $devalidate;
+ if ($uselink && !$result) {
+ $devalidate = 1;
+ } elsif (!$uselink && $result) {
+ $devalidate = 1;
+ }
+ if ($devalidate) {
+ &Apache::lonnet::devalidate_cache_new('noiframe',$remhost.':'.$remport);
+ }
+ }
+ } else {
+ if ($uselink) {
+ $result = 1;
+ } else {
+ $result = 0;
+ }
+ &Apache::lonnet::do_cache_new('noiframe',$remhost.':'.$remport,$result,3600);
+ }
+ return $uselink;
+}
+
+sub page_menu {
+ my ($menucolls,$menunum) = @_;
+ my %menu;
+ foreach my $item (split(/;/,$menucolls)) {
+ my ($num,$value) = split(/\%/,$item);
+ if ($num eq $menunum) {
+ my @entries = split(/\&/,$value);
+ foreach my $entry (@entries) {
+ my ($name,$fields) = split(/=/,$entry);
+ if (($name eq 'top') || ($name eq 'inline') || ($name eq 'foot') || ($name eq 'main')) {
+ $menu{$name} = $fields;
+ } else {
+ my @shown;
+ if ($fields =~ /,/) {
+ @shown = split(/,/,$fields);
+ } else {
+ @shown = ($fields);
+ }
+ if (@shown) {
+ foreach my $field (@shown) {
+ next if ($field eq '');
+ $menu{$field} = 1;
+ }
+ }
+ }
+ }
+ }
+ }
+ return %menu;
}
1;
__END__;
+
500 Internal Server Error
Internal Server Error
The server encountered an internal error or
misconfiguration and was unable to complete
your request.
Please contact the server administrator at
root@localhost to inform them of the time this error occurred,
and the actions you performed just before this error.
More information about this error may be available
in the server error log.