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Diff for /loncom/interface/lonindexer.pm between versions 1.21 and 1.28

version 1.21, 2001/10/16 17:04:31	version 1.28, 2001/12/13 13:38:14
Line 1	Line 1
# The LearningOnline Network with CAPA	# The LearningOnline Network with CAPA
#
# Directory Indexer	# Directory Indexer
#	#
	# $Id$
	#
	# 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/
	#
# YEAR=1999	# YEAR=1999
# 5/21/99, 5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14 Gerd Kortemeyer)	# 5/21/99, 5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14 Gerd Kortemeyer)
# 11/23 Gerd Kortemeyer	# 11/23 Gerd Kortemeyer
Line 15	Line 38
# 6/26,7/8 H. K. Ng	# 6/26,7/8 H. K. Ng
# 8/6,8/7,8/10 Scott Harrison	# 8/6,8/7,8/10 Scott Harrison
# 8/14 H. K. Ng	# 8/14 H. K. Ng
# 8/28,10/15 Scott Harrison	# 8/28,10/15,11/28,11/29 Scott Harrison
	# 11/30 Matthew Hall
	# 12/11,12/13 Scott Harrison
	#
	###

	###############################################################################
	## ##
	## ORGANIZATION OF THIS PERL MODULE ##
	## ##
	## 1. Description of functions ##
	## 2. Modules used by this module ##
	## 3. Choices for different output views (detailed, summary, xml, etc) ##
	## 4. BEGIN block (to be run once after compilation) ##
	## 5. Handling routine called via Apache and mod_perl ##
	## 6. Other subroutines ##
	## ##
	###############################################################################

package Apache::lonindexer;	package Apache::lonindexer;

	# ------------------------------------------------- modules used by this module
use strict;	use strict;
use Apache::lonnet();	use Apache::lonnet();
use Apache::Constants qw(:common);	use Apache::Constants qw(:common);
use Apache::File;	use Apache::File;
use GDBM_File;	use GDBM_File;

	# ---------------------------------------- variables used throughout the module
my %hash; # tied to a user-specific gdbm file	my %hash; # tied to a user-specific gdbm file
my %dirs; # keys are directories, values are the open/close status	my %dirs; # keys are directories, values are the open/close status
my %language; # has the reference information present in language.tab	my %language; # has the reference information present in language.tab
Line 39 my $dnum; # directory counter	Line 81 my $dnum; # directory counter
sub BEGIN {	sub BEGIN {
my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
'/language.tab');	'/language.tab');
map {	while(<$fh>) {
$_=~/(\w+)\s+([\w\s\-]+)/;	$_=~/(\w+)\s+([\w\s\-]+)/;
$language{$1}=$2;	$language{$1}=$2;
} <$fh>;	}
}	}

# ---------------------------------------------------------------- Main Handler	# ----------------------------- Handling routine called via Apache and mod_perl
sub handler {	sub handler {
my $r = shift;	my $r = shift;
$r->content_type('text/html');	$r->content_type('text/html');
Line 53 sub handler {	Line 95 sub handler {
return OK if $r->header_only;	return OK if $r->header_only;
$fnum=0;	$fnum=0;
$dnum=0;	$dnum=0;
	untie %hash;

# --------------------------------------------- machine configuration variables	# ------------------------------------- read in machine configuration variables
my $iconpath= $r->dir_config('lonIconsURL') . "/";	my $iconpath= $r->dir_config('lonIconsURL') . "/";
my $domain = $r->dir_config('lonDefDomain');	my $domain = $r->dir_config('lonDefDomain');
my $role = $r->dir_config('lonRole');	my $role = $r->dir_config('lonRole');
Line 197 ENDHEADER	Line 240 ENDHEADER
my %achash;	my %achash;
my $ac=0;	my $ac=0;
# some initial hashes for working with data	# some initial hashes for working with data
map {	foreach (@Acts) {
my ($state,$ref)=split(/a/);	my ($state,$ref)=split(/a/);
$ahash{$ref}=$state;	$ahash{$ref}=$state;
$achash{$ref}=$ac;	$achash{$ref}=$ac;
$ac++;	$ac++;
} (@Acts);	}
# sorting through the actions and changing the tied database hash	# sorting through the actions and changing the tied database hash
map {	foreach (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) {
my $key=$_;	my $key=$_;
if ($ahash{$key} eq '1') {	if ($ahash{$key} eq '1') {
$hash{'store_'.$hash{'pre_'.$key.'_link'}}=	$hash{'store_'.$hash{'pre_'.$key.'_link'}}=
Line 218 ENDHEADER	Line 261 ENDHEADER
delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};	delete $hash{'store_'.$hash{'pre_'.$key.'_link'}};
}	}
}	}
} sort {$achash{$a}<=>$achash{$b}} (keys %ahash);	}
# deleting the previously cached listing	# deleting the previously cached listing
map {	foreach (keys %hash) {
if ($_ =~ /^pre_/ && $_ =~/link$/) {	if ($_ =~ /^pre_/ && $_ =~/link$/) {
my $key = $_;	my $key = $_;
$key =~ s/^pre_//;	$key =~ s/^pre_//;
Line 228 ENDHEADER	Line 271 ENDHEADER
delete $hash{'pre_'.$key.'_title'};	delete $hash{'pre_'.$key.'_title'};
delete $hash{'pre_'.$key.'_link'};	delete $hash{'pre_'.$key.'_link'};
}	}
} keys %hash;	}
}	}

# output title	# ---------------------------------------------------------------- output title
$r->print('<h2><font color="#888888">The LearningOnline With CAPA '.	$r->print('<h2><font color="#888888">The LearningOnline With CAPA '.
'Network Directory Browser</font></h2>'."\n");	'Network Directory Browser</font></h2>'."\n");
# get state of file attributes to be showing	# ---------------------------------- get state of file attributes to be showing
if ($ENV{'form.attrs'} ne "") {	if ($ENV{'form.attrs'} ne "") {
for (my $i=0; $i<=6; $i++) {	for (my $i=0; $i<=6; $i++) {
delete $hash{'display_attrs_'.$i};	delete $hash{'display_attrs_'.$i};
Line 248 ENDHEADER	Line 291 ENDHEADER
$attrchk[$i] = "checked" if $hash{'display_attrs_'.$i} == 1;	$attrchk[$i] = "checked" if $hash{'display_attrs_'.$i} == 1;
}	}
}	}
# output state of file attributes to be showing	# ------------------------------- output state of file attributes to be showing
$r->print(<<END);	$r->print(<<END);
<b><font color="#666666">Display file attributes</font></b><br />	<b><font color="#666666">Display file attributes</font></b><br />
<form method="post" name="fileattr" action="$uri"	<form method="post" name="fileattr" action="$uri"
Line 273 $groupimportbutton	Line 316 $groupimportbutton
</form>	</form>
END	END

# output starting row to the indexed file/directory hierarchy	# ----------------- output starting row to the indexed file/directory hierarchy
my $titleclr="#ddffff";	my $titleclr="#ddffff";
$r->print("<table border=0><tr><td bgcolor=#eeeeee>\n");	$r->print("<table border=0><tr><td bgcolor=#eeeeee>\n");
$r->print("<table border=0><tr>\n");	$r->print("<table border=0><tr>\n");
Line 292 END	Line 335 END
if ($hash{'display_attrs_5'} == 1);	if ($hash{'display_attrs_5'} == 1);
$r->print("</tr>");	$r->print("</tr>");

# read in what directories have previously been set to "open"	# ----------------- read in what directories have previously been set to "open"
map {	foreach (keys %hash) {
if ($_ =~ /^diropen_status_/) {	if ($_ =~ /^diropen_status_/) {
my $key = $_;	my $key = $_;
$key =~ s/^diropen_status_//;	$key =~ s/^diropen_status_//;
$dirs{$key} = $hash{$_};	$dirs{$key} = $hash{$_};
}	}
} keys %hash;	}

if ($ENV{'form.openuri'}) { # take care of review and refresh options	if ($ENV{'form.openuri'}) { # take care of review and refresh options
my $uri=$ENV{'form.openuri'};	my $uri=$ENV{'form.openuri'};
Line 330 END	Line 373 END
$toplevel = $hash{'top.level'};	$toplevel = $hash{'top.level'};
}	}

# if not at top level, provide an uplink arrow	# -------------------------------- if not at top level, provide an uplink arrow
if ($toplevel ne "/res/"){	if ($toplevel ne "/res/"){
my (@uri_com) = split(/\//,$uri);	my (@uri_com) = split(/\//,$uri);
pop @uri_com;	pop @uri_com;
Line 340 END	Line 383 END
$indent = 1;	$indent = 1;
}	}

# recursively go through all the directories and output as appropriate	# -------- recursively go through all the directories and output as appropriate
&scanDir ($r,$toplevel,$indent,\%hash);	&scanDir ($r,$toplevel,$indent,\%hash);

# information useful for group import	# ---------------------------- embed hidden information useful for group import
$r->print("<form name='fnum'>");	$r->print("<form name='fnum'>");
$r->print("<input type='hidden' name='fnum' value='$fnum'></form>");	$r->print("<input type='hidden' name='fnum' value='$fnum'></form>");

# end the tables	# -------------------------------------------------------------- end the tables
$r->print("</table>");	$r->print("</table>");
$r->print("</td></tr></table>");	$r->print("</td></tr></table>");

# end the output and return	# --------------------------------------------------- end the output and return
$r->print("</body></html>\n");	$r->print("</body></html>\n");
untie(%hash);	untie(%hash);
} else {	} else {
Line 362 END	Line 405 END
return OK;	return OK;
}	}


# ----------------------------------------------- recursive scan of a directory	# ----------------------------------------------- recursive scan of a directory
sub scanDir {	sub scanDir {
my ($r,$startdir,$indent,$hashref)=@_;	my ($r,$startdir,$indent,$hashref)=@_;
Line 416 sub get_list {	Line 458 sub get_list {
$luri =~ s/\//_/g;	$luri =~ s/\//_/g;

if ($ENV{'form.attrs'} eq "Refresh") {	if ($ENV{'form.attrs'} eq "Refresh") {
map {	foreach (keys %hash) {
delete $hash{$_} if ($_ =~ /^dirlist_files_/);	delete $hash{$_} if ($_ =~ /^dirlist_files_/);
} keys %hash;	}
}	}

if ($hash{'dirlist_files'.$luri}) {	if ($hash{'dirlist_files'.$luri}) {
Line 438 sub match_ext {	Line 480 sub match_ext {
my @fileext;	my @fileext;
my $dirptr=16384;	my $dirptr=16384;

my $tabdir = $r->dir_config('lonTabDir');
my $fn = $tabdir.'/filetypes.tab';
if (-e $fn) {
my $FH=Apache::File->new($fn);
my @content=<$FH>;
foreach my $line (@content) {
(my $ext,my $foo) = split /\s+/,$line;
push @fileext,$ext;
}
}
foreach my $line (@packlist) {	foreach my $line (@packlist) {
chomp $line;	chomp $line;
$line =~ s/^\/home\/httpd\/html//;	$line =~ s/^\/home\/httpd\/html//;
Line 458 sub match_ext {	Line 490 sub match_ext {
my $fext = pop(@filecom);	my $fext = pop(@filecom);
my $fnptr = $unpackline[3]&$dirptr;	my $fnptr = $unpackline[3]&$dirptr;
if ($fnptr == 0 and $unpackline[3] ne "") {	if ($fnptr == 0 and $unpackline[3] ne "") {
foreach my $nextline (@fileext) {	my $embstyle = &Apache::loncommon::fileembstyle($fext);
push @trimlist,$line if $nextline eq $fext;	push @trimlist,$line if (defined($embstyle) &&
}	$embstyle ne 'hdn' );
} else {	} else {
push @trimlist,$line;	push @trimlist,$line;
}	}
Line 470 sub match_ext {	Line 502 sub match_ext {
}	}

# ------------------------------- displays one line in appropriate table format	# ------------------------------- displays one line in appropriate table format
sub display_line{	sub display_line {
my ($r,$diropen,$line,$indent,$startdir,$hashref,@list)=@_;	my ($r,$diropen,$line,$indent,$startdir,$hashref,@list)=@_;
my (@pathfn, $fndir, $fnptr);	my (@pathfn, $fndir, $fnptr);
my $dirptr=16384;	my $dirptr=16384;
Line 560 sub display_line{	Line 592 sub display_line{
# display file	# display file
if ($fnptr == 0 and $filecom[3] ne "") {	if ($fnptr == 0 and $filecom[3] ne "") {
my @file_ext = split (/\./,$listname);	my @file_ext = split (/\./,$listname);
my $curfext = $file_ext[scalar(@file_ext)-1];	my $curfext = $file_ext[-1];
	# Set the icon for the file
	my $iconname = "unknown.gif";
	my $embstyle = &Apache::loncommon::fileembstyle($curfext);
	# The unless conditional that follows is a bit of overkill
	$iconname = $curfext.".gif" unless
	(!defined($embstyle) \|\| $embstyle eq 'unk' \|\| $embstyle eq 'hdn');
	#
my $filelink = $startdir.$filecom[0];	my $filelink = $startdir.$filecom[0];
$r->print("<tr><td nowrap valign='bottom' bgcolor=$fileclr>");	$r->print("<tr><td nowrap valign='bottom' bgcolor=$fileclr>");
my $metafile = grep /^$filecom[0]\.meta\&/, @list;	my $metafile = grep /^$filecom[0]\.meta\&/, @list;
Line 614 sub display_line{	Line 653 sub display_line{
".gif border='0' />\n") if $rem > 0;	".gif border='0' />\n") if $rem > 0;
}	}

$r->print("<img src=$iconpath$curfext.gif border='0' />\n");	$r->print("<img src=$iconpath$iconname border='0' />\n");
$r->print (" <a href=\"javascript:openWindow('".$filelink.	$r->print (" <a href=\"javascript:openWindow('".$filelink.
"', 'metadatafile', '450', '500', 'no', 'yes')\";".	"', 'metadatafile', '450', '500', 'no', 'yes')\";".
" TARGET=_self>$listname</a> ");	" TARGET=_self>$listname</a> ");
Line 651 sub display_line{	Line 690 sub display_line{
if ($hash{'display_attrs_5'} == 1) {	if ($hash{'display_attrs_5'} == 1) {
my $lang = &Apache::lonnet::metadata($filelink,'language')	my $lang = &Apache::lonnet::metadata($filelink,'language')
if ($metafile == 1);	if ($metafile == 1);
$lang = $language{$lang};	$lang = &Apache::loncommon::languagedescription($lang);
$lang = ' ' if (!$lang);	$lang = ' ' if (!$lang);
$r->print("<td bgcolor=$fileclr valign=bottom> ".$lang.	$r->print("<td bgcolor=$fileclr valign=bottom> ".$lang.
" </td>\n");	" </td>\n");
Line 715 sub begin_form {	Line 754 sub begin_form {

# ----------- grab unprocessed CGI variables that may have been appended to URL	# ----------- grab unprocessed CGI variables that may have been appended to URL
sub get_unprocessed_cgi {	sub get_unprocessed_cgi {
map {	foreach (split(/&/,$ENV{'QUERY_STRING'})) {
my ($name, $value) = split(/=/,$_);	my ($name, $value) = split(/=/,$_);
$value =~ tr/+/ /;	$value =~ tr/+/ /;
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;	$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
if ($name eq 'catalogmode' or $name eq 'launch' or $name eq 'acts') {	if ($name eq 'catalogmode' or $name eq 'launch' or $name eq 'acts') {
$ENV{'form.'.$name}=$value;	$ENV{'form.'.$name}=$value;
}	}
} (split(/&/,$ENV{'QUERY_STRING'}));	}
}	}

# --------- settings whenever the user causes the indexer window to be launched	# --------- settings whenever the user causes the indexer window to be launched
sub start_fresh_session {	sub start_fresh_session {
delete $hash{'mode_catalog'};	delete $hash{'mode_catalog'};
map {	foreach (keys %hash) {
if ($_ =~ /^pre_/) {	if ($_ =~ /^pre_/) {
delete $hash{$_};	delete $hash{$_};
}	}
if ($_ =~ /^store/) {	if ($_ =~ /^store/) {
delete $hash{$_};	delete $hash{$_};
}	}
} keys %hash;	}
}	}

1;	1;
__END__
	=head1 NAME

	Apache::lonindexer - mod_perl module for cross server filesystem browsing

	=head1 SYNOPSIS

	Invoked by /etc/httpd/conf/srm.conf:

	<LocationMatch "^/res.*/$">
	SetHandler perl-script
	PerlHandler Apache::lonindexer
	</LocationMatch>

	=head1 INTRODUCTION

	This module enables a scheme of browsing across a cross server.

	This is part of the LearningOnline Network with CAPA project
	described at http://www.lon-capa.org.

	=head1 BEGIN SUBROUTINE

	This routine is only run once after compilation.

	=over 4

	=item *

	Initializes %language hash table.

	=back

	=head1 HANDLER SUBROUTINE

	This routine is called by Apache and mod_perl.

	=over 4

	=item *

	read in machine configuration variables

	=item *

	see if called from an interactive mode

	=item *

	refresh environment with user database values (in %hash)

	=item *

	define extra fields and buttons in case of special mode

	=item *

	set catalogmodefunctions to have extra needed javascript functionality

	=item *

	print header

	=item *

	evaluate actions from previous page (both cumulatively and chronologically)

	=item *

	output title

	=item *

	get state of file attributes to be showing

	=item *

	output state of file attributes to be showing

	=item *

	output starting row to the indexed file/directory hierarchy

	=item *

	read in what directories have previously been set to "open"

	=item *

	if not at top level, provide an uplink arrow

	=item *

	recursively go through all the directories and output as appropriate

	=item *

	information useful for group import

	=item *

	end the tables

	=item *

	end the output and return

	=back

	=head1 OTHER SUBROUTINES

	=over 4

	=item *

	scanDir - recursive scan of a directory

	=item *

	get_list - get complete matched list based on the uri (returns an array)

	=item *

	match_ext - filters out files based on extensions (returns an array)

	=item *

	display_line - displays one line in appropriate table format

	=item *

	begin_form - prints the beginning of a form for directory or file link

	=item *

	get_unprocessed_cgi - grab unprocessed CGI variables that may have been
	appended to URL

	=item *

	start_fresh_session - settings whenever the user causes the indexer window
	to be launched

	=back

	=cut

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Removed from v.1.21
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	Added in v.1.28