# The LearningOnline Network with CAPA
# Construction Space Directory Lister
#
# $Id: lonpubdir.pm,v 1.37 2003/08/03 01:20:02 www Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#
# (TeX Content Handler
#
# YEAR=2000
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
# YEAR=2001
# 03/23 Guy Albertelli
# 03/24,03/29 Gerd Kortemeyer)
# 03/31,04/03,05/09,06/23,08/18,08/20 Gerd Kortemeyer
# 12/28 Gerd Kortemeyer
#
###
package Apache::lonpubdir;
use strict;
use Apache::File;
use File::Copy;
use Apache::Constants qw(:common :http :methods);
use Apache::loncacc;
use Apache::loncommon();
sub handler {
my $r=shift;
my $fn;
$fn = getEffectiveUrl($r);
# Validate access to the construction space and get username@domain.
my $uname;
my $udom;
($uname,$udom)=
&Apache::loncacc::constructaccess(
$fn,$r->dir_config('lonDefDomain'));
unless (($uname) && ($udom)) {
$r->log_reason($uname.' at '.$udom.
' trying to list directory '.$ENV{'form.filename'}.
' ('.$fn.') - not authorized',
$r->filename);
return HTTP_NOT_ACCEPTABLE;
}
# Remove trailing / from directory name.
$fn=~s/\/$//;
unless ($fn) {
$r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
' trying to list empty directory', $r->filename);
return HTTP_NOT_FOUND;
}
# ----------------------------------------------------------- Start page output
my $thisdisfn=$fn;
$thisdisfn=~s/^\/home\/$uname\/public_html//; # subdirectory part of
# construction space.
my $docroot=$r->dir_config('lonDocRoot'); # Apache londocument root.
my $resdir=$docroot.'/res/'.$udom.'/'.$uname.$thisdisfn; # Resource directory
my $targetdir=$udom.'/'.$uname.$thisdisfn; # Publiction target directory.
my $linkdir='/priv/'.$uname.$thisdisfn; # Full URL name of constr space.
&startpage($r, $uname, $udom, $thisdisfn); # Put out the start of page.
# Start off the diretory table.
$r->print('<table border=2>'.
'<tr><th>Actions</th><th>Name</th><th>Title</th>'.
'<th>Status</th><th>Last Modified</th></tr>');
my $filename;
my $dirptr=16384; # Mask indicating a directory in stat.cmode.
opendir(DIR,$fn);
my @files=sort(readdir(DIR));
foreach my $filename (@files) {
my ($cdev,$cino,$cmode,$cnlink,
$cuid,$cgid,$crdev,$csize,
$catime,$cmtime,$cctime,
$cblksize,$cblocks)=stat($fn.'/'.$filename);
my $extension='';
if ($filename=~/\.(\w+)$/) { $extension=$1; }
if ($cmode&$dirptr) {
putdirectory($r, $thisdisfn, $linkdir, $filename, $cmtime);
} elsif (&Apache::loncommon::fileembstyle($extension) ne 'hdn') {
putresource($r, $uname, $filename, $thisdisfn, $resdir,
$targetdir, $linkdir, $cmtime);
} else {
# "hidden" extension and not a directory, so hide it away.
}
}
closedir(DIR);
$r->print('</table></body></html>');
return OK;
}
#
# Gets the effective URL of the request and returns it:
# $effn = getEffectiveUrl($r);
# $r - The Apache Request object.
sub getEffectiveUrl {
my $r = shift;
my $fn;
if ($ENV{'form.filename'}) { # If a form filename is defined.
$fn=$ENV{'form.filename'};
#
# Replace the ~username of the URL with /home/username/public_html
# so that we don't have to worry about ~ expansion internally.
#
$fn=~s/^http\:\/\/[^\/]+\///;
$fn=~s/^\///;
$fn=~s/\~(\w+)/\/home\/$1\/public_html/;
# Remove trailing / strings (?)
$fn=~s/\/[^\/]+$//;
} else {
# If no form is defined, use request filename.
$fn = $r->filename();
my $lonDocRoot=$r->dir_config('lonDocRoot');
if ( $fn =~ /$lonDocRoot/ ) {
#internal authentication, needs fixup.
$fn = $r->uri(); # non users do not get the full path request
# through SCRIPT_FILENAME
$fn=~s|^/~(\w+)|/home/$1/public_html|;
}
}
$fn=~s/\/+/\//g;
return $fn;
}
#
# Output the header of the page. This includes:
# - The HTML header
# - The H1/H3 stuff which includes the directory.
#
# startpage($r, $uame, $udom, $thisdisfn);
# $r - The apache request object.
# $uname - User name.
# $udom - Domain name the user is logged in under.
# $thisdisfn - Displayable version of the filename.
sub startpage {
my ($r, $uname, $udom, $thisdisfn) = @_;
$r->content_type('text/html');
$r->send_http_header;
$r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
$r->print(&Apache::loncommon::bodytag(undef,undef,undef,1));
my $pubdirscript=(<<ENDPUBDIRSCRIPT);
<script>
// Store directory location for menu bar to find
parent.lastknownpriv='/~$uname/$thisdisfn/';
// Confirmation dialogues
function pubdir(theform) {
if (confirm('Publish complete directory?')) {
theform.submit();
}
}
function pubrecdir(theform) {
if (confirm('Publish directory and all subdirectories?')) {
theform.pubrec.value='1';
theform.submit();
}
}
</script>
ENDPUBDIRSCRIPT
$r->print('<h1>Construction Space Directory <tt>'.
$thisdisfn.'/</tt></h1>'.
'<script type="text/javascript">top.document.title = \''.
$thisdisfn.'/ - LON-CAPA Construction Space\';</script>'.
$pubdirscript.
'<form method="post" action="/adm/publish" target="_parent">'.
'<table><tr><td><input type="hidden" name="filename" value="/~'.
$uname.$thisdisfn.'/" />'.
'<input type="button" onClick="pubdir(this.form);" value="Publish Directory" />'.
'<input type="hidden" name="pubrec" value="" />'.
'<input type="button" onClick="pubrecdir(this.form);" value="Publish Directory and Sub Directories" /></td><td>'.
'<input type="button" onClick="window.location='."'/~".
$uname.$thisdisfn."/default.meta'".'" value="Edit Directory Catalog Information" /></td></tr><tr><td><input type="checkbox" name="forcerepub" /> Force publication of unmodified files.</td><td> </td></tr></table></form>');
if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
$r->print('<h3>Co-Author: '.$uname.' at '.$udom.
'</h3>');
}
}
#
# Get the title string or "[untitled]" if the file has no title metadata:
# Without the latter substitution, it's impossible to examine metadata for
# untitled resources. Resources may be legitimately untitled, to prevent
# searches from locating them.
#
# $str = getTitleString($fullname);
# $fullname - Fully qualified filename to check.
#
sub getTitleString {
my $fullname = shift;
my $title = &Apache::lonnet::metadata($fullname, 'title');
unless ($title) {
$title = "[untitled]";
}
return $title;
}
#
# Put out a directory table row:
# putdirectory(r, base, here, dirname, modtime)
# r - Apache request object.
# reqfile - File in request.
# here - Where we are in directory tree.
# dirname - Name of directory special file.
# modtime - Encoded modification time.
#
sub putdirectory {
my ($r, $reqfile, $here, $dirname, $modtime) = @_;
# construct the display filename: the directory name unless ..:
my $disfilename = $dirname;
if ($dirname eq '..') {
$disfilename = '<i>Parent Directory</i>';
}
unless (( ($dirname eq '..') && ($reqfile eq '')) ||
($dirname eq '.')) {
$r->print('<tr bgcolor="#CCCCFF">'.
'<td>Go to ...</td>'.
'<td><a href="'.$here.'/'.$dirname.'/" target="_top">'.
$disfilename.'</a></td>'.
'<td> </td>'.
'<td> </td>'.
'<td>'.localtime($modtime).'</td>'.
"</tr>\n");
}
return OK;
}
#
# Put a table row for a file resource.
#
sub putresource {
my ($r, $uname, $filename, $thisdisfn,
$resdir, $targetdir, $linkdir,
$cmtime) = @_;
my $status='Unpublished';
my $bgcolor='#FFCCCC';
my $title=' ';
if (-e $resdir.'/'.$filename) {
my ($rdev,$rino,$rmode,$rnlink,
$ruid,$rgid,$rrdev,$rsize,
$ratime,$rmtime,$rctime,
$rblksize,$rblocks)=stat($resdir.'/'.$filename);
if ($rmtime>=$cmtime) {
$status='Published';
$bgcolor='#CCFFCC';
$title='<a href="/res/'.$targetdir.'/'.$filename.
'.meta" target=cat>'.
getTitleString($targetdir.'/'.$filename, 'title').'</a>';
} else {
$status='Modified';
$bgcolor='#FFFFCC';
$title='<a href="/res/'.$targetdir.'/'.$filename.'.meta" target=cat>'.
getTitleString($targetdir.'/'.$filename,'title').'</a>';
if (&Apache::loncommon::fileembstyle(($filename=~/\.(\w+)$/)) eq 'ssi') {
$status.='<br><a href="/adm/diff?filename=/~'.$uname.
$thisdisfn.'/'.$filename.
'&versiontwo=priv" target=cat>Diffs</a>';
}
}
$status.='<br><a href="/adm/retrieve?filename=/~'.$uname.
$thisdisfn.'/'.$filename.'" target=cat>Retrieve</a>';
}
my $editlink='';
if ($filename=~/\.(xml|html|htm|xhtml|xhtm|sty)$/) {
$editlink=' (<a href="'.$linkdir.'/'.$filename.'?forceedit=1" target="_top">Edit</a>)';
}
if ($filename=~/\.(problem|exam|quiz|assess|survey|form|library)$/) {
$editlink=' (<a href="'.$linkdir.'/'.$filename.'?forceedit=1" target="_top">EditXML</a>)';
}
$r->print('<tr bgcolor="'.$bgcolor.'">'.
'<td><a target="_parent" href="/adm/publish?filename=/~'.
$uname.$thisdisfn.'/'.$filename.'">'.'Publish</a>'.
'</td>'.
'<td>'.
'<a href="'.$linkdir.'/'.$filename.'" target="_top">'.
$filename.'</a>'.$editlink.
'</td>'.
'<td>'.$title.'</td>'.
'<td>'.$status.'</td>'.
'<td>'.localtime($cmtime).'</td>'.
"</tr>\n");
return OK;
}
#
# Categorize files in the directory.
# For each file in a list of files in a file directory,
# the file categorized as one of:
# - directory
# - sequence
# - problem
# - Other resource.
#
# For each file the modification date is determined as well.
# Returned is a list of sublists:
# (directories, sequences, problems, other)
# each of the sublists contains entries of the following form (sorted by
# filename):
# (filename, typecode, lastmodtime)
#
# $list = CategorizeFiles($location, $files)
# $location - Directory in which the files live (relative to our
# execution.
# $files - list of files.
#
sub CategorizeFiles {
my $location = shift;
my $files = shift;
}
1;
__END__
=head1 NAME
Apache::lonpubdir - Construction space directory lister
=head1 SYNOPSIS
Invoked (for various locations) by /etc/httpd/conf/srm.conf:
<LocationMatch "^/\~.*/$">
PerlAccessHandler Apache::loncacc
SetHandler perl-script
PerlHandler Apache::lonpubdir
ErrorDocument 403 /adm/login
ErrorDocument 404 /adm/notfound.html
ErrorDocument 406 /adm/unauthorized.html
ErrorDocument 500 /adm/errorhandler
</LocationMatch>
<Location /adm/pubdir>
PerlAccessHandler Apache::lonacc
SetHandler perl-script
PerlHandler Apache::lonpubdir
ErrorDocument 403 /adm/login
ErrorDocument 404 /adm/notfound.html
ErrorDocument 406 /adm/unauthorized.html
ErrorDocument 500 /adm/errorhandler
</Location>
=head1 INTRODUCTION
This module publishes a directory of files.
This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.
=head1 HANDLER SUBROUTINE
This routine is called by Apache and mod_perl.
=over 4
=item *
read in information
=item *
start page output
=item *
run through list of files and attempt to publish unhidden files
=back
=cut
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