version 1.3, 2000/10/16 20:47:39
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version 1.17, 2006/02/07 19:46:08
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# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# Handler to resolve ambiguous file locations |
# Handler to resolve ambiguous file locations |
# |
# |
# (TeX Content Handler |
# $Id$ |
# |
# |
# 05/29/00,05/30,10/11 Gerd Kortemeyer) |
# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
# |
# |
# 10/11,10/12,10/16 Gerd Kortemeyer |
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package Apache::lonambiguous; |
package Apache::lonambiguous; |
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Line 13 use strict;
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Line 32 use strict;
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use Apache::lonnet; |
use Apache::lonnet; |
use Apache::Constants qw(:common REDIRECT); |
use Apache::Constants qw(:common REDIRECT); |
use GDBM_File; |
use GDBM_File; |
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use Apache::loncommon; |
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use Apache::lonlocal; |
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my %bighash; |
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sub cleanup { |
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if (tied(%bighash)){ |
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&Apache::lonnet::logthis('Cleanup ambiguous: bighash'); |
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unless (untie(%bighash)) { |
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&Apache::lonnet::logthis('Failed cleanup ambiguous: bighash'); |
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} |
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} |
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return OK; |
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} |
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# ----------------------------------------------------------- Could not resolve |
# ----------------------------------------------------------- Could not resolve |
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sub getlost { |
sub getlost { |
my ($r,$errmsg)=@_; |
my ($r,$errmsg)=@_; |
$r->content_type('text/html'); |
$errmsg=&mt($errmsg); |
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&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->send_http_header; |
$r->print( |
$r->print( |
'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
'<head><title>Unknown Error</title></head>'. |
'LON-CAPA</h1>Could not handle ambiguous resource reference.<p>'.$errmsg. |
&Apache::loncommon::bodytag('Could not handle ambiguous resource reference'). |
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$errmsg. |
'</body></html>'); |
'</body></html>'); |
} |
} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub make_symb { |
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my ($id)=@_; |
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my ($mapid,$resid)=split(/\./,$id); |
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my $map=$bighash{'map_id_'.$mapid}; |
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my $res=$bighash{'src_'.$id}; |
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my $symb=&Apache::lonnet::encode_symb($map,$resid,$res); |
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return $symb; |
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} |
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sub handler { |
sub handler { |
my $r=shift; |
my $r=shift; |
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if ($r->header_only) { |
if ($r->header_only) { |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->send_http_header; |
return OK; |
return OK; |
} |
} |
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# ---------------------------------------------------------- Is this selecting? |
# ---------------------------------------------------------- Is this selecting? |
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my %bighash; |
if ($env{'form.selecturl'}) { |
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if ($ENV{'form.selecturl'}) { |
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my $envkey; |
my $envkey; |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
foreach $envkey (keys %ENV) { |
foreach $envkey (keys %env) { |
if ($envkey=~/^form\.(\d+)\.(\d+)$/) { |
if ($envkey=~/^form\.(\d+)\.(\d+)$/) { |
# ---------------------------------------------------- Update symb and redirect |
# ---------------------------------------------------- Update symb and redirect |
my $mapid=$1; |
my $mapid=$1; |
my $resid=$2; |
my $resid=$2; |
my $resurl=$bighash{'src_'.$mapid.'.'.$resid}; |
my $resurl=$bighash{'src_'.$mapid.'.'.$resid}; |
&Apache::lonnet::symblist($bighash{'map_id_'.$mapid}, |
&Apache::lonnet::symblist($bighash{'map_id_'.$mapid}, |
$resurl => $resid); |
$resurl => [$resurl,$resid]); |
untie(%bighash); |
untie(%bighash); |
$r->header_out(Location => |
$r->header_out(Location => |
'http://'.$ENV{'HTTP_HOST'}.$resurl); |
'http://'.$ENV{'HTTP_HOST'}.$resurl); |
Line 70 sub handler {
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Line 111 sub handler {
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# ---------------------------------------------------------- Do we have a case? |
# ---------------------------------------------------------- Do we have a case? |
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my $thisfn; |
my $thisfn; |
unless (($thisfn=$ENV{'request.ambiguous'})&&($ENV{'request.course.fn'})) { |
unless (($thisfn=$env{'request.ambiguous'})&&($env{'request.course.fn'})) { |
&getlost($r,'Could not find information on resource.'); |
&getlost($r,'Could not find information on resource.'); |
return OK; |
return OK; |
} |
} |
Line 81 sub handler {
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Line 122 sub handler {
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my %hash; |
my %hash; |
my $syval=''; |
my $syval=''; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
$syval=$hash{$thisfn}; |
$syval=$hash{$thisfn}; |
untie(%hash); |
untie(%hash); |
} |
} |
Line 90 sub handler {
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Line 131 sub handler {
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# ---------------------------------------------------------- There was an entry |
# ---------------------------------------------------------- There was an entry |
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if ($syval) { |
if ($syval) { |
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my ($page,undef,$res)=&Apache::lonnet::decode_symb($syval); |
if ($syval=~/\_$/) { |
if ($res eq 'page') { |
# ----------------------------------- Okay, this should have appeared on a page |
# ----------------------------------- Okay, this should have appeared on a page |
$syval=~s/\_\_\_$//; |
&Apache::loncommon::content_type($r,'text/html'); |
$r->content_type('text/html'); |
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$r->header_out(Location => |
$r->header_out(Location => |
'http://'.$ENV{'HTTP_HOST'}.'/res/'.$syval); |
'http://'.$ENV{'HTTP_HOST'}. |
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&Apache::lonnet::clutter($page)); |
return REDIRECT; |
return REDIRECT; |
} else { |
} else { |
# There is not really a problem (???), but cannot go back without endless loop |
# There is not really a problem (???), but cannot go back without endless loop |
Line 104 sub handler {
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Line 145 sub handler {
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return OK; |
return OK; |
} |
} |
} |
} |
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# ------------------------------------Encrypted requests go straight to navmaps |
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if ($env{'request.enc'}) { |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.'/adm/navmaps'); |
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return REDIRECT; |
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} |
# ------------------------------------------------ Would be standalone resource |
# ------------------------------------------------ Would be standalone resource |
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if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
# ---------------------------------------------- Get ID(s) for current resource |
# ---------------------------------------------- Get ID(s) for current resource |
my $ids=$bighash{'ids_/res/'.$thisfn}; |
my $ids=$bighash{'ids_'.&Apache::lonnet::clutter($thisfn)}; |
if ($ids) { |
if ($ids) { |
# ------------------------------------------------------------------- Has ID(s) |
# ------------------------------------------------------------------- Has ID(s) |
my @possibilities=split(/\,/,$ids); |
my @possibilities=split(/\,/,$ids); |
my $couldbe=''; |
my $couldbe=''; |
map { |
foreach (@possibilities) { |
if (&Apache::lonnet::allowed('bre',$bighash{'src_'.$_})) { |
if ($bighash{'encrypted_'.$_}) { next; } |
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my $symb=&make_symb($_); |
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if (&Apache::lonnet::allowed('bre',$bighash{'src_'.$_},$symb)) { |
if ($couldbe) { |
if ($couldbe) { |
$couldbe.=','.$_; |
$couldbe.=','.$_; |
} else { |
} else { |
$couldbe=$_; |
$couldbe=$_; |
} |
} |
} |
} |
} @possibilities; |
} |
if ($couldbe) { |
if ($couldbe) { |
@possibilities=split(/\,/,$couldbe); |
@possibilities=split(/\,/,$couldbe); |
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if ($#possibilities==0) { |
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my $id=$possibilities[0]; |
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my $resurl=$bighash{'src_'.$id}; |
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my $mapurl=$bighash{'map_id_'.(split(/\./,$id))[0]}; |
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my $symb=&make_symb($id); |
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&Apache::loncommon::content_type($r,'text/html'); |
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&Apache::lonnet::logthis('http://'.$ENV{'HTTP_HOST'}.$resurl.'?symb='.$symb); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.$resurl.'?symb='.$symb); |
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return REDIRECT; |
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} |
if ($#possibilities>0) { |
if ($#possibilities>0) { |
# ----------------------------------------------- Okay, really multiple choices |
# ----------------------------------------------- Okay, really multiple choices |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->send_http_header; |
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my $bodytag= |
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&Apache::loncommon::bodytag('Pick Instance of Resource'); |
$r->print(<<ENDSTART); |
$r->print(<<ENDSTART); |
<head><title>Choose Location</title></head> |
<head><title>Choose Location</title></head> |
<body bgcolor="#FFFFFF"> |
$bodytag |
<h1>LON-CAPA</h1> |
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The resource you had been accessing appears more than once in this course, |
The resource you had been accessing appears more than once in this course, |
and LON-CAPA has insufficient session information to determine which instance |
and LON-CAPA has insufficient session information to determine which instance |
of the resource you meant. |
of the resource you meant. |
<p> |
<p> |
Please click on the instance of the resource you intended to access: |
Please click on the instance of the resource you intended to access: |
<p> |
</p> |
<form action="/adm/ambiguous" method=post> |
<table border="2"> |
<input type=hidden name=orgurl value="$thisfn"> |
<tr><th>Title</th><th>Part of ...</th></tr> |
<input type=hidden name=selecturl value=1> |
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<table border=2> |
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<tr><th> </th><th>Title</th><th>Type</th><th>Part of ...</th></tr> |
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ENDSTART |
ENDSTART |
map { |
map { |
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my $resurl=$bighash{'src_'.$_}; |
my $mapurl=$bighash{'map_id_'.(split(/\./,$_))[0]}; |
my $mapurl=$bighash{'map_id_'.(split(/\./,$_))[0]}; |
$r->print('<tr><td><input type=submit value=Select name="'. |
my $symb=&make_symb($_); |
$_.'"></td><td>'.$bighash{'title_'.$_}. |
$r->print('<tr><td><a href="'.$resurl.'?symb='.$symb.'">'. |
'</td><td>'.$bighash{'type_'.$_}. |
&Apache::lonnet::gettitle($symb). |
'</td><td><a href="'.$mapurl.'">'.$mapurl. |
'</a></td><td>'. |
'</a></td></tr>'); |
&Apache::lonnet::gettitle($mapurl).' '. |
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'</td></tr>'); |
} @possibilities; |
} @possibilities; |
$r->print('</table></form></body></html>'); |
$r->print('</table></body></html>'); |
untie(%bighash); |
untie(%bighash); |
return OK; |
return OK; |
} |
} |