--- loncom/homework/daxeopen.pm	2015/12/03 20:40:27	1.1
+++ loncom/homework/daxeopen.pm	2023/08/23 22:34:48	1.11
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Opening converted problems and directory listings for Daxe
 #
-# $Id: daxeopen.pm,v 1.1 2015/12/03 20:40:27 damieng Exp $
+# $Id: daxeopen.pm,v 1.11 2023/08/23 22:34:48 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -28,96 +28,218 @@
 ###
 
 package Apache::daxeopen;
+use strict;
 
-use Apache::Constants;
+use Apache::Constants qw(:common);
 use DateTime;
 use Try::Tiny;
 use File::stat;
 use Fcntl ':mode';
 
+use LONCAPA qw(:match);
 use Apache::loncommon;
 use Apache::lonnet;
 use Apache::pre_xml;
 use Apache::html_to_xml;
 use Apache::post_xml;
-
+use Apache::lonlocal;
 
 sub handler {
     my $request = shift;
     my $uri = $request->uri;
-    $uri =~ s/^\/daxeopen//;
+    $uri =~ s{^/daxeopen}{};
     &Apache::loncommon::no_cache($request);
-    if ($uri =~ /\/$/) {
+    if ($uri =~ m{/$}) {
         return directory_listing($uri, $request);
-    } elsif ($uri =~ /\.(task|problem|exam|quiz|assess|survey|library)$/) {
+    } elsif ($uri =~ m{^/priv/.*\.(task|problem|exam|quiz|assess|survey|library|xml|html|htm|xhtml|xhtm)$}) {
         return convert_problem($uri, $request);
     } else {
         # Apache should send other files directly
-        return HTTP_NOT_ACCEPTABLE;
+        $request->status(406);
+        return OK;
     }
 }
 
 sub convert_problem {
     my ($uri, $request) = @_;
-    
+    if ($uri =~ m{^/priv/([^/]+)/([^/]+)/}) {
+        my ($domain, $user) = ($1, $2);
+        my ($uname, $udom) = ($env{'user.name'}, $env{'user.domain'});
+        if (!defined $uname || !defined $udom || $domain ne $udom || $user ne $uname) {
+            $request->content_type('text/plain');
+            $request->print(&mt('Forbidden URI: [_1]',$uri));
+            $request->status(403);
+            return OK;
+        }
+    }
     my $file = &Apache::lonnet::filelocation('', $uri);
     &Apache::lonnet::repcopy($file);
     if (! -e $file) {
-        return HTTP_NOT_FOUND;
+        $request->status(404);
+        return OK;
     }
     try {
         my $warnings = 0; # no warning printed
         my $textref = &Apache::pre_xml::pre_xml($file, $warnings);
-        $textref = &Apache::html_to_xml::html_to_xml($textref, $warnings);
-        my $text = &Apache::post_xml::post_xml($textref, $file, $warnings);
+        my $case_sensitive;
+        if ($uri =~ /\.(task)$/) {
+          $case_sensitive = 1;
+        } else {
+          $case_sensitive = 0;
+        }
+        $textref = &Apache::html_to_xml::html_to_xml($textref, $warnings, $case_sensitive);
+        my $text = &Apache::post_xml::post_xml($textref, $file, $Apache::lonnet::perlvar{'lonDocRoot'}, $warnings);
         &Apache::loncommon::content_type($request, 'text/xml', 'utf-8');
         $request->print($text);
         return OK;
     } catch {
-        die "convert failed for $file: $_";
-        #$request->print('<?xml version="1.0" encoding="UTF-8"?>'."\n");
-        #$request->print("<problem>\n");
-        #$request->print("convert failed for $file: $_");
-        #$request->print("</problem>\n");
-        #return OK;
+        $request->content_type('text/plain');
+        $request->print(&mt('convert failed for [_1]:',$file)." $_");
+        $request->status(406);
+        return OK;
     };
 }
 
 sub directory_listing {
     my ($uri, $request) = @_;
-    my $dirpath = &Apache::lonnet::filelocation('', $uri);
-    if (! -e $dirpath) {
-        return HTTP_NOT_FOUND;
-    }
-    $dirpath =~ s/\/$//;
-    opendir my $dir, $dirpath or die "Cannot open directory: $dirpath";
-    my @files = readdir $dir;
-    closedir $dir;
     my $res = '<?xml version="1.0" encoding="UTF-8"?>'."\n";
-    my $dirname = $dirpath;
-    $dirname =~ s/^.*\/([^\/]*)$/$1/;
-    $res .= "<directory name=\"$dirname\">\n";
-    foreach my $name (@files) {
-        if ($name eq '.' || $name eq '..') {
-            next;
-        }
-        if ($name =~ /\.(bak|log|meta|save)$/) {
-            next;
-        }
-        $sb = stat($dirpath.'/'.$name);
-        my $mode = $sb->mode;
-        if (S_ISDIR($mode)) {
-            $res .= "<directory name=\"$name\"/>\n";
+    if ($uri eq '/') {
+        # root: let users browse /res
+        $res .= "<directory name=\"/\">\n";
+        $res .= "<directory name=\"priv\"/>\n";
+        $res .= "<directory name=\"res\"/>\n";
+    } elsif ($uri !~ m{^/(priv|res)/}) {
+        $request->content_type('text/plain');
+        $request->print(&mt('Not found: [_1]',$uri));
+        $request->status(404);
+        return OK;
+    } elsif ($uri =~ m{^/res/}) {
+        # NOTE: dirlist does not return an error for /res/idontexist/
+	my ($listref, $listerror) = &Apache::lonnet::dirlist($uri);
+	if ($listerror) {
+            $request->content_type('text/plain');
+            $request->print(&mt('listing error: [_1]',$listerror));
+            $request->status(406);
+            return OK;
+	} elsif ($uri =~ m{^/res/[^/]+/$} && scalar(@{$listref}) == 0) {
+            $request->content_type('text/plain');
+            $request->print(&mt('Not found: [_1]',$uri));
+            $request->status(404);
+            return OK;
+	}
+        my $dirname = $uri;
+        $dirname =~ s{^.*/([^/]*)$}{$1};
+        $res .= "<directory name=\"$dirname/\">\n";
+        if (ref($listref) eq 'ARRAY') {
+            my @lines = @{$listref};
+            foreach my $line (@lines) {
+                my ($path, $dom, undef, $testdir, undef, undef, undef, undef, $size, undef, $mtime, undef, undef, undef, $obs, undef) = split(/\&/, $line, 16);
+                my $isdir = ($testdir & 16384) || $dom =~ /^(user|domain)$/;
+                $path =~ s{^/home/httpd/html/res/}{};
+                next if $path eq '.' || $path eq '..';
+                next if $path =~ /\.meta$/ || $obs || $path =~ /\.\d+\.[^.]+$/;
+                if ($dom ne 'domain') {
+                    my ($udom,$uname);
+                    if ($dom eq 'user') {
+                        ($udom) = ($uri =~ m{^/res/($match_domain)});
+                        $uname = $path;
+                    } else {
+                        ($udom, $uname) = ($uri =~ m{^/res/($match_domain)/($match_courseid)});
+                    }
+                    if ($udom ne '' && $uname ne '') {
+                        # remove courses from the list
+                        next if (&Apache::lonnet::is_course($udom, $uname));
+                    }
+                }
+                $path =~ s{/$}{};
+                my $name = $path;
+                if ($isdir) {
+                    $res .= "<directory name=\"$name\"/>\n";
+                } else {
+                    my $dt = DateTime->from_epoch(epoch => $mtime);
+                    my $modified = $dt->iso8601().'Z';
+                    $res .= "<file name=\"$name\" size=\"$size\" modified=\"$modified\"/>\n";
+                }
+            }
+        }
+    } elsif ($uri eq '/priv/') {
+        my $udom = $env{'user.domain'};
+        if (!defined $udom) {
+            $request->content_type('text/plain');
+            $request->print(&mt('Forbidden URI: [_1]',$uri));
+            $request->status(403);
+            return OK;
+        }
+        $res .= "<directory name=\"priv\">\n";
+        $res .= "<directory name=\"$udom\"/>\n";
+    } elsif ($uri =~ m{^/priv/([^/]+)/$}) {
+        my $domain = $1;
+        my ($uname, $udom) = ($env{'user.name'}, $env{'user.domain'});
+        if (!defined $uname || !defined $udom || $domain ne $udom) {
+            $request->content_type('text/plain');
+            $request->print(&mt('Forbidden URI: [_1]',$uri));
+            $request->status(403);
+            return OK;
+        }
+        $res .= "<directory name=\"$domain\">\n";
+        $res .= "<directory name=\"$uname\"/>\n";
+    } elsif ($uri =~ m{^/priv/([^/]+)/([^/]+)/}) {
+        my ($domain, $user) = ($1, $2);
+        my ($uname, $udom) = ($env{'user.name'}, $env{'user.domain'});
+        if (!defined $uname || !defined $udom || $domain ne $udom || $user ne $uname) {
+            $request->content_type('text/plain');
+            $request->print(&mt('Forbidden URI: [_1]',$uri));
+            $request->status(403);
+            return OK;
+        }
+        my $dirpath = &Apache::lonnet::filelocation('', $uri);
+        if (! -e $dirpath) {
+            $request->content_type('text/plain');
+            $request->print(&mt('Not found: [_1]',$uri));
+            $request->status(404);
+            return OK;
+        }
+        $dirpath =~ s{/$}{};
+        my @files;
+        if (opendir(my $dir, $dirpath)) {
+            @files = readdir($dir);
+            closedir($dir);
         } else {
-            $res .= "<file name=\"$name\"";
-            my $size = $sb->size; # total size of file, in bytes
-            $res .= " size=\"$size\"";
-            my $mtime = $sb->mtime; # last modify time in seconds since the epoch
-            my $dt = DateTime->from_epoch(epoch => $mtime);
-            my $modified = $dt->iso8601().'Z';
-            $res .= " modified=\"$modified\"";
-            $res .= "/>\n";
+            $request->content_type('text/plain');
+            $request->print(&mt('Error opening directory: [_1]',$dirpath));
+            $request->status(403);
+            return OK;
         }
+        my $dirname = $dirpath;
+        $dirname =~ s{^.*/([^/]*)$}{$1};
+        $res .= "<directory name=\"$dirname\">\n";
+        foreach my $name (@files) {
+            if ($name eq '.' || $name eq '..') {
+                next;
+            }
+            if ($name =~ /\.(bak|log|meta|save)$/) {
+                next;
+            }
+            my $sb = stat($dirpath.'/'.$name);
+            my $mode = $sb->mode;
+            if (S_ISDIR($mode)) {
+                $res .= "<directory name=\"$name\"/>\n";
+            } else {
+                $res .= "<file name=\"$name\"";
+                my $size = $sb->size; # total size of file, in bytes
+                $res .= " size=\"$size\"";
+                my $mtime = $sb->mtime; # last modify time in seconds since the epoch
+                my $dt = DateTime->from_epoch(epoch => $mtime);
+                my $modified = $dt->iso8601().'Z';
+                $res .= " modified=\"$modified\"";
+                $res .= "/>\n";
+            }
+        }
+    } else {
+        $request->content_type('text/plain');
+        $request->print(&mt('Not found: [_1]',$uri));
+        $request->status(404);
+        return OK;
     }
     $res .= "</directory>\n";
     &Apache::loncommon::content_type($request, 'text/xml', 'utf-8');
@@ -125,26 +247,5 @@ sub directory_listing {
     return OK;
 }
 
-# NOTE: binaries should be sent directly be Apache
-# sub send_binary {
-#     my ($request, $filepath) = @_;
-# 
-#     $buffer = '';
-#     if (!open(FILE, "<", $filepath)) {
-#         return HTTP_NOT_FOUND;
-#     }
-#     binmode(FILE);
-# 
-#     # Read file in 32K blocks
-#     while ((read(FILE, $buffer, 32768)) != 0) {
-#         $request->print($buffer);
-#     } 
-# 
-#     if (!close(FILE)) {
-#         &Apache::lonnet::logthis("Error closing the file $filepath");
-#     }
-#     return OK;
-# }
-
 1;
 __END__