--- loncom/publisher/lonupload.pm	2003/08/04 18:22:55	1.19
+++ loncom/publisher/lonupload.pm	2011/11/14 00:20:31	1.59
@@ -1,8 +1,7 @@
-
 # The LearningOnline Network with CAPA
 # Handler to upload files into construction space
 #
-# $Id: lonupload.pm,v 1.19 2003/08/04 18:22:55 www Exp $
+# $Id: lonupload.pm,v 1.59 2011/11/14 00:20:31 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -28,252 +27,6 @@
 #
 ###
 
-package Apache::lonupload;
-
-use strict;
-use Apache::File;
-use File::Copy;
-use File::Basename;
-use Apache::Constants qw(:common :http :methods);
-use Apache::loncacc;
-use Apache::loncommon();
-use Apache::Log();
-use Apache::lonnet;
-use HTML::Entities();
-
-my $DEBUG=0;
-
-sub Debug {
-  
-  # Marshall the parameters.
-  
-  my $r       = shift;
-  my $log     = $r->log;
-  my $message = shift;
-  
-  # Put out the indicated message butonly if DEBUG is false.
-  
-  if ($DEBUG) {
-    $log->debug($message);
-  }
-}
-
-sub upfile_store {
-    my $r=shift;
-	
-    my $fname=$ENV{'form.upfile.filename'};
-    $fname=~s/\W//g;
-    
-    chomp($ENV{'form.upfile'});
-  
-    my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
-		  '_upload_'.$fname.'_'.time.'_'.$$;
-    {
-       my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
-                                   '/tmp/'.$datatoken.'.tmp');
-       print $fh $ENV{'form.upfile'};
-    }
-    return $datatoken;
-}
-
-
-sub phaseone {
-   my ($r,$fn,$uname,$udom)=@_;
-   $ENV{'form.upfile.filename'}=~s/\\/\//g;
-   $ENV{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
-   if ($ENV{'form.upfile.filename'}) {
-    $fn=~s/\/[^\/]+$//;
-    $fn=~s/([^\/])$/$1\//;
-    $fn.=$ENV{'form.upfile.filename'};
-    $fn=~s/^\///;
-    $fn=~s/(\/)+/\//g;
-
-#    Fn is the full path to the destination filename.
-#    
-
-    &Debug($r, "Filename for upload: $fn");
-    if (($fn) && ($fn!~/\/$/)) {
-      $r->print(
- '<form action=/adm/upload method=post>'.
- '<input type=hidden name=phase value=two>'.
- '<input type=hidden name=datatoken value="'.&upfile_store.'">'.
- '<input type=hidden name=uploaduname value="'.$uname.'">'.
- 'Store uploaded file as '.
- '<input type=text size=50 name=filename value="'.$fn.'"><br>'.
- '<input type=submit value="Store"></form>');
-      # Check for bad extension and warn user
-      if ($fn=~/\.(\w+)$/ && 
-	  (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
-	  $r->print(
- '<font color=red>'.
- 'The extension on this file, "'.$1.
- '", is reserved internally by LON-CAPA. <br \>'.
- 'Please change the extension.'.
- '</font>');
-      } elsif($fn=~/\.(\w+)$/ && 
-	      !defined(&Apache::loncommon::fileembstyle($1))) {
-	  $r->print(
- '<font color=red>'.
- 'The extension on this file, "'.$1.
- '", is not recognized by LON-CAPA. <br \>'.
- 'Please change the extension.'.
- '</font>');
-      }
-  } else {
-      $r->print('<font color=red>Illegal filename.</font>');
-  }
- } else {
-     $r->print('<font color=red>No upload file specified.</font>');
- }
-}
-
-sub phasetwo {
-   my ($r,$tfn,$uname,$udom)=@_;
-   my $fn='/priv/'.$uname.'/'.$tfn;
-   $fn=~s/\/+/\//g;
-   &Debug($r, "Filename is ".$tfn);
-   if ($tfn) {
-    &Debug($r, "Filename for tfn = ".$tfn);
-    my $target='/home/'.$uname.'/public_html'.$tfn;
-    &Debug($r, "target -> ".$target);
-#     target is the full filesystem path of the destination file.
-    my $base = &File::Basename::basename($fn);
-    my $path = &File::Basename::dirname($fn);
-    $base    = &HTML::Entities::encode($base);
-    my $url  = $path."/".$base; 
-    &Debug($r, "URL is now ".$url);
-    my $datatoken=$ENV{'form.datatoken'};
-    if (($fn) && ($datatoken)) {
-	if ((-e $target) && ($ENV{'form.override'} ne 'Yes')) {
-           $r->print(
- '<form action=/adm/upload method=post>'.
- 'File <tt>'.$fn.'</tt> exists. Overwrite? '.
- '<input type=hidden name=phase value=two>'.
- '<input type=hidden name=filename value="'."$url".'">'.
- '<input type=hidden name=datatoken value="'.$datatoken.'">'.
- '<input type=submit name=override value="Yes"></form>');
-       } else {
-           my $source=$r->dir_config('lonDaemons').
-	                             '/tmp/'.$datatoken.'.tmp';
-           # Check for bad extension and disallow upload
-	   if ($fn=~/\.(\w+)$/ && 
-	       (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
-	       $r->print(
- 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
- '<font color=red>'.
- 'The extension on this file is reserved internally by LON-CAPA.'.
- '</font>');
-              $r->print('<p><font size=+2><a href="'.$path.
-                        '">Back to Directory</a></font>');
-	   } elsif ($fn=~/\.(\w+)$/ && 
-		    !defined(&Apache::loncommon::fileembstyle($1))) {
-	       $r->print(
- 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
- '<font color=red>'.
- 'The extension on this file is not recognized by LON-CAPA.'.
- '</font>');
-	       $r->print('<p><font size=+2><a href="'.$path.
-                        '">Back to Directory</a></font>');
-	   } elsif (-d $target) {
-	       $r->print(
- 'File <tt>'.$fn.'</tt> could not be copied.<br />'.
- '<font color=red>'.
- 'The target is an existing directory.'.
- '</font>');
-	       $r->print('<p><font size=+2><a href="'.$path.
-                        '">Back to Directory</a></font>');
-	   } elsif (copy($source,$target)) {
-	       chmod(0660, $target); # Set permissions to rw-rw---.
-	      $r->print('File copied.');
-              $r->print('<p><font size=+2><a href="'.$url.
-                        '">View file</a></font>');
-              $r->print('<p><font size=+2><a href="'.$path.
-                        '">Back to Directory</a></font>');
-	   } else {
-              $r->print('Failed to copy: '.$!);
-              $r->print('<p><font size=+2><a href="'.$path.
-                        '">Back to Directory</a></font>');
-	   }
-       }
-    } else {
-       $r->print(
-   '<font size=+1 color=red>Please use browser "Back" button and pick a filename</font><p>');
-    }
-  } else {
-    $r->print(
-   '<font size=+1 color=red>Please use browser "Back" button and pick a filename</font><p>');
-  }
-}
-
-# ---------------------------------------------------------------- Main Handler
-sub handler {
-
-  my $r=shift;
-
-  my $uname;
-  my $udom;
-#
-# phase two: re-attach user
-#
-  if ($ENV{'form.uploaduname'}) {
-      $ENV{'form.filename'}='/priv/'.$ENV{'form.uploaduname'}.'/'.
-	  $ENV{'form.filename'};
-  }
-#
-
-  ($uname,$udom)=
-    &Apache::loncacc::constructaccess(
-			 $ENV{'form.filename'},$r->dir_config('lonDefDomain'));
-  unless (($uname) && ($udom)) {
-     $r->log_reason($uname.' at '.$udom.
-         ' trying to publish file '.$ENV{'form.filename'}.
-         ' - not authorized', 
-         $r->filename); 
-     return HTTP_NOT_ACCEPTABLE;
-  }
-
-  my $fn;
-  if ($ENV{'form.filename'}) {
-      $fn=$ENV{'form.filename'};
-      $fn=~s/^http\:\/\/[^\/]+\///;
-      $fn=~s/^\///;
-      $fn=~s/(\~|priv\/)(\w+)//;
-      $fn=~s/\/+/\//g;
-  } else {
-     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
-         ' unspecified filename for upload', $r->filename); 
-     return HTTP_NOT_FOUND;
-  }
-
-# ----------------------------------------------------------- Start page output
-
-
-  $r->content_type('text/html');
-  $r->send_http_header;
-
-  $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
-
-  $r->print(&Apache::loncommon::bodytag('Upload file to Construction Space'));
-  
-  if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
-          $r->print('<h3><font color=red>Co-Author: '.$uname.' at '.$udom.
-               '</font></h3>');
-  }
-
-
-  if ($ENV{'form.phase'} eq 'two') {
-      &phasetwo($r,$fn,$uname,$udom);
-  } else {
-      &phaseone($r,$fn,$uname,$udom);
-  }
-
-  $r->print('</body></html>');
-  return OK;  
-}
-
-1;
-__END__
-
 =head1 NAME
 
 Apache::lonupload - upload files into construction space
@@ -316,33 +69,489 @@ Start page output
 
 =item *
 
-output relevant interface phase (phaseone or phasetwo)
+output relevant interface phase (phaseone, phasetwo, phasethree or phasefour)
 
 =item *
 
 (phase one is to specify upload file; phase two is to handle conditions
-subsequent to specification--like overwriting an existing file)
+subsequent to specification--like overwriting an existing file; phase three
+is to handle processing of secondary uploads - of embedded objects in an
+html file).
 
 =back
 
 =head1 OTHER SUBROUTINES
 
-=over 4
+=over
 
-=item *
+=item phaseone()
 
-phaseone() : Interface for specifying file to upload.
+Interface for specifying file to upload.
 
-=item *
+=item phasetwo()
 
-phasetwo() : Interface for handling post-conditions about uploading (such
+Interface for handling post-conditions about uploading (such
 as overwriting an existing file).
 
-=item *
+=item phasethree()
 
-upfile_store() : Store contents of uploaded file into temporary space.  Invoked
+Interface for handling secondary uploads of embedded objects
+in an html file.
+
+=item phasefour()
+
+Interface for handling optional renaming of links to embedded
+objects. 
+
+=item upfile_store()
+
+Store contents of uploaded file into temporary space.  Invoked
 by phaseone subroutine.
 
+=item check_extension()
+
+Checks if filename extension is permitted and checks type
+ of file - if html file, calls parser to check for embedded objects.
+ Invoked by phasetwo subroutine.
+
 =back
 
 =cut
+
+package Apache::lonupload;
+
+use strict;
+use Apache::File;
+use File::Copy;
+use File::Basename;
+use Apache::Constants qw(:common :http :methods);
+use Apache::loncacc;
+use Apache::loncommon();
+use Apache::lonnet;
+use HTML::Entities();
+use Apache::lonlocal;
+use Apache::lonnet;
+use LONCAPA();
+
+my $DEBUG=0;
+
+sub Debug {
+    # Put out the indicated message but only if DEBUG is true.
+    if ($DEBUG) {
+	my ($r,$message) = @_;
+	$r->log_reason($message);
+    }
+}
+
+sub upfile_store {
+    my $r=shift;
+	
+    my $fname=$env{'form.upfile.filename'};
+    $fname=~s/\W//g;
+    
+    chomp($env{'form.upfile'});
+  
+    my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
+		  '_upload_'.$fname.'_'.time.'_'.$$;
+    {
+       my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
+                                   '/tmp/'.$datatoken.'.tmp');
+       print $fh $env{'form.upfile'};
+    }
+    return $datatoken;
+}
+
+sub phaseone {
+    my ($r,$fn,$mode)=@_;
+    my $action = '/adm/upload';
+    if ($mode eq 'testbank') {
+        $action = '/adm/testbank';
+    } elsif ($mode eq 'imsimport') {
+        $action = '/adm/imsimport';
+    }
+
+    # Check for file to be uploaded
+    $env{'form.upfile.filename'}=~s/\\/\//g;
+    $env{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
+    if (!$env{'form.upfile.filename'}) {
+        $r->print('<p class="LC_warning">'.&mt('No upload file specified.').'</p>');
+        return;
+    }
+
+    # Append the name of the uploaded file
+    $fn.=$env{'form.upfile.filename'};
+    $fn=~s/(\/)+/\//g;
+
+    # Check for illegal filename
+    &Debug($r, "Filename for upload: $fn");
+    if (!(($fn) && ($fn!~/\/$/))) {
+        $r->print('<p class="LC_warning">'.&mt('Illegal filename.').'</p>');
+        return;
+    }
+# Split part that I can change from the part that I cannot change
+    my ($fn1,$fn2)=($fn=~/^(\/priv\/[^\/]+\/[^\/]+\/)(.*)$/);
+    # Display additional options for upload
+    # and upload button
+    $r->print(
+        '<form action="'.$action.'" method="post" name="fileupload">'
+       .'<input type="hidden" name="phase" value="two" />'
+       .'<input type="hidden" name="datatoken" value="'.&upfile_store.'" />'
+    );
+    $r->print(
+        &Apache::lonhtmlcommon::start_pick_box()
+       .&Apache::lonhtmlcommon::row_title(&mt('Save uploaded file as'))
+       .'<span class="LC_filename">'.$fn1.'</span>'
+       .'<input type="hidden" name="filename1" value="'.$fn1.'" />'
+       .'<input type="text" size="50" name="filename2" value="'.$fn2.'" />'
+       .&Apache::lonhtmlcommon::row_closure()
+       .&Apache::lonhtmlcommon::row_title(&mt('File Type'))
+       .'<select name="filetype">'
+       .'<option value="standard" selected="selected">'.&mt('Regular file').'</option>'
+       .'<option value="testbank">'.&mt('Testbank file').'</option>'
+       .'<option value="imsimport">'.&mt('IMS package').'</option>'
+       .'</select>'.&Apache::loncommon::help_open_topic("Uploading_File_Options")
+       .&Apache::lonhtmlcommon::row_closure(1)
+       .&Apache::lonhtmlcommon::end_pick_box()
+    );
+    $r->print(
+        '<p>'
+       .'<input type="button" value="'.&mt('Upload').'" onclick="javascript:verifyForm()"/>'
+       .'</p>'
+       .'</form>'
+    );
+
+   # Check for bad extension and warn user
+    if ($fn=~/\.(\w+)$/ && 
+        (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
+                $r->print('<p class="LC_error">'
+                          .&mt('The extension on this file, [_1], is reserved internally by LON-CAPA.',
+                               '<span class="LC_filename">'.$1.'</span>')
+                          .' <br />'.&mt('Please change the extension.')
+                          .'</p>');
+    } elsif($fn=~/\.(\w+)$/ && 
+                    !defined(&Apache::loncommon::fileembstyle($1))) {
+                $r->print('<p class="LC_error">'
+                         .&mt('The extension on this file, [_1], is not recognized by LON-CAPA.',
+                              '<span class="LC_filename">'.$1.'</span>')
+                         .' <br />'.&mt('Please change the extension.')
+                         .'</p>');
+    }
+}
+
+sub phasetwo {
+    my ($r,$fn,$mode)=@_;
+
+    my $output;
+    my $action = '/adm/upload';
+    my $returnflag = '';
+    if ($mode eq 'testbank') {
+        $action = '/adm/testbank';
+    } elsif ($mode eq 'imsimport') {
+        $action = '/adm/imsimport';
+    }
+    $fn=~s/\/+/\//g;
+    if ($fn) {
+	my $target= $r->dir_config('lonDocRoot').'/'.$fn;
+	&Debug($r, "target -> ".$target);
+#     target is the full filesystem path of the destination file.
+	my $base = &File::Basename::basename($fn);
+	my $path = &File::Basename::dirname($fn);
+	$base    = &HTML::Entities::encode($base,'<>&"');
+	my $url  = $path."/".$base; 
+	&Debug($r, "URL is now ".$url);
+	my $datatoken=$env{'form.datatoken'};
+	if (($fn) && ($datatoken)) {
+            if ($env{'form.cancel'}) {
+                my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
+                my $dirpath=$path.'/';
+                $dirpath=~s/\/+/\//g;
+                $output .= '<p class="LC_warning">'.&mt('Upload cancelled.').'</p>'
+                          .'<p><a href="'.$dirpath.'">'.
+                          &mt('Back to Directory').'</a></p>';
+            } elsif ((-e $target) && (!$env{'form.override'})) {
+                $output .= '<form action="'.$action.'" method="post">'
+                          .'<p class="LC_warning">'
+                          .&mt('File [_1] already exists.',
+                               '<span class="LC_filename">'.$fn.'</span>')
+                         .'<input type="hidden" name="phase" value="two" />'
+                         .'<input type="hidden" name="filename" value="'.$url.'" />'
+                         .'<input type="hidden" name="datatoken" value="'.$datatoken.'" />'
+                         .'<p>'
+                         .'<input type="submit" name="cancel" value="'.&mt('Cancel').'" />'
+                         .' <input type="submit" name="override" value="'.&mt('Overwrite').'" />'
+                         .'</p>'
+                         .'</form>';
+            } else {
+		my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
+		my $dirpath=$path.'/';
+		$dirpath=~s/\/+/\//g;
+		# Check for bad extension and disallow upload
+                my $result;
+                ($result,$returnflag) = &check_extension($fn,$mode,$source,$target,$action,$dirpath,$url);
+                $output .= $result;
+	    }
+	} else {
+	    $output .= '<span class="LC_error">'.
+		      &mt('Please use browser "Back" button and pick a filename').
+		      '</span><br />';
+	}
+    } else {
+	$output .= '<span class="LC_error">'.
+		   &mt('Please use browser "Back" button and pick a filename').
+		   '</span><br />';
+    }
+    return ($output,$returnflag);
+}
+
+sub check_extension {
+    my ($fn,$mode,$source,$target,$action,$dirpath,$url) = @_;
+    my ($result,$returnflag);
+    # Check for bad extension and disallow upload
+    if ($fn=~/\.(\w+)$/ &&
+        (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
+        $result .= '<p class="LC_warning">'.
+                   &mt('File [_1] could not be copied.',
+                       '<span class="LC_filename">'.$fn.'</span> ').
+                   '<br />'.
+                   &mt('The extension on this file is reserved internally by LON-CAPA.').
+                   '</p>';
+    } elsif ($fn=~/\.(\w+)$/ &&
+             !defined(&Apache::loncommon::fileembstyle($1))) {
+        $result .= '<p class="LC_warning">'.
+                   &mt('File [_1] could not be copied.',
+                       '<span class="LC_filename">'.$fn.'</span> ').
+                   '<br />'.
+                   &mt('The extension on this file is not recognized by LON-CAPA.').
+                   '</p>';
+    } elsif (-d $target) {
+        $result .= '<p class="LC_warning">'.
+                   &mt('File [_1] could not be copied.',
+                       '<span class="LC_filename">'.$fn.'</span>').
+                   '<br />'.
+                   &mt('The target is an existing directory.').
+                   '</p>';
+    } elsif (copy($source,$target)) {
+        chmod(0660, $target); # Set permissions to rw-rw---.
+        if ($mode eq 'testbank' || $mode eq 'imsimport') {
+            $returnflag = 'ok';
+            $result .= '<p class="LC_success">'
+                      .&mt('Your file - [_1] - was uploaded successfully.',
+                           '<span class="LC_filename">'.$fn.'<span>')
+                      .'</p>';
+        } else {
+            $result .= '<p class="LC_success">'
+                      .&mt('File copied.')  
+                      .'</p>';
+        }
+        # Check for embedded objects.
+        my (%allfiles,%codebase);
+        my ($text,$header,$css,$js);
+        if (($mode ne 'imsimport') && ($target =~ /\.(htm|html|shtml)$/i)) {
+            my (%allfiles,%codebase);
+            &Apache::lonnet::extract_embedded_items($target,\%allfiles,\%codebase);
+            if (keys(%allfiles) > 0) {
+                my ($currentpath) = ($url =~ m{^(.+)/[^/]+$});
+                my $state = &embedded_form_elems('upload_embedded',$url,$mode);
+                my ($embedded,$num,$pathchg) = 
+                    &Apache::loncommon::ask_for_embedded_content($action,$state,\%allfiles,
+                                                                 \%codebase,
+                                                                 {'error_on_invalid_names'   => 1,
+                                                                  'ignore_remote_references' => 1,
+                                                                  'current_path'             => $currentpath});
+                if ($embedded) {
+                    $result .= '<h3>'.&mt('Reference Warning').'</h3>';
+                    if ($num) {
+                        $result .= '<p>'.&mt('Completed upload of the file.').' '.&mt('This file contained references to other files.').'</p>'.
+                                   '<p>'.&mt('Please select the locations from which the referenced files are to be uploaded.').'</p>'.
+                                   $embedded;
+                        if ($mode eq 'testbank') {
+                            $returnflag = 'embedded';
+                            $result .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without these files.','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
+                        }
+                    } else {
+                        $result .= '<p>'.&mt('Completed upload of the file.').'</p>'.$embedded;
+                        if ($pathchg) {
+                            if ($mode eq 'testbank') {
+                                $returnflag = 'embedded';
+                                $result .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without modifying the references(s).','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        if (($mode ne 'imsimport') && ($mode ne 'testbank')) {
+            $result .= '<br /><a href="'.$url.'">'.
+                        &mt('View file').'</a>';
+        }
+    } else {
+        $result .= &mt('Failed to copy: [_1].',$!);
+    }
+    if ($mode ne 'imsimport' && $mode ne 'testbank') {
+        $result .= '<br /><a href="'.$dirpath.'">'.
+                   &mt('Back to Directory').'</a><br />';
+    }
+    return ($result,$returnflag);
+}
+
+sub phasethree {
+    my ($r,$fn,$uname,$udom,$mode) = @_;
+
+    my $action = '/adm/upload'; 
+    if ($mode eq 'testbank') {
+        $action = '/adm/testbank';
+    } elsif ($mode eq 'imsimport') {
+        $action = '/adm/imsimport';
+    }
+    my $url_root = "/priv/$udom/$uname";
+    my $dir_root = $r->dir_config('lonDocRoot').$url_root;
+    my $path = &File::Basename::dirname($fn);
+    $path =~ s{^\Q$url_root\E}{};
+    my $filename = &HTML::Entities::encode($env{'form.filename'},'<>&"');
+    my $state = &embedded_form_elems('modify_orightml',$filename,$mode).
+                '<input type="hidden" name="phase" value="four" />';
+    my ($result,$returnflag) = 
+        &Apache::loncommon::upload_embedded($mode,$path,$uname,$udom,
+                                            $dir_root,$url_root,undef,
+                                            undef,undef,$state,$action);
+    if ($mode ne 'imsimport' && $mode ne 'testbank') {
+        $result .= '<br /><h3><a href="'.$fn.'">'.
+                  &mt('View main file').'</a></h3>'.
+                  '<h3><a href="'.$url_root.$path.'">'.
+                  &mt('Back to Directory').'</a></h3><br />';
+    }
+    return ($result,$returnflag);
+}
+
+sub embedded_form_elems {
+    my ($action,$filename,$mode) = @_;
+    return <<STATE;
+    <input type="hidden" name="action" value="$action" />
+    <input type="hidden" name="mode" value="$mode" />
+    <input type="hidden" name="filename" value="$filename" />
+STATE
+}
+
+sub phasefour {
+    my ($r,$fn,$uname,$udom,$mode) = @_;
+
+    my $action = '/adm/upload';
+    if ($mode eq 'testbank') {
+        $action = '/adm/testbank';
+    } elsif ($mode eq 'imsimport') {
+        $action = '/adm/imsimport';
+    }
+    my $result;
+    my $url_root = "/priv/$udom/$uname";
+    my $dir_root = $r->dir_config('lonDocRoot').$url_root;
+    my $path = &File::Basename::dirname($fn);
+    $path =~ s{^\Q$url_root\E}{};
+    $result .= &Apache::loncommon::modify_html_refs($mode,$path,
+                              $uname,$udom,$dir_root);
+    if ($mode ne 'imsimport' && $mode ne 'testbank') {
+        $result .= '<br /><h3><a href="'.$fn.'">'.
+                  &mt('View main file').'</a></h3>'.
+                  '<h3><a href="'.$url_root.$path.'">'.
+                  &mt('Back to Directory').'</a></h3><br />';
+    }
+    return $result;
+}
+
+# ---------------------------------------------------------------- Main Handler
+sub handler {
+
+    my $r=shift;
+    my $javascript = '';
+    my $fn=$env{'form.filename'};
+
+    if ($env{'form.filename1'}) {
+       $fn=$env{'form.filename1'}.$env{'form.filename2'};
+    }
+    $fn=~s/\/+/\//g;
+
+    unless ($fn) {
+        $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
+                       ' unspecified filename for upload', $r->filename);
+        return HTTP_NOT_FOUND;
+    }
+
+    my ($uname,$udom)=&Apache::loncacc::constructaccess($fn);
+
+    unless (($uname) && ($udom)) {
+        $r->log_reason($uname.' at '.$udom.
+                       ' trying to publish file '.$env{'form.filename'}.
+                       ' - not authorized',
+                       $r->filename);
+        return HTTP_NOT_ACCEPTABLE;
+    }
+
+# ----------------------------------------------------------- Start page output
+
+    &Apache::loncommon::content_type($r,'text/html');
+    $r->send_http_header;
+
+    unless ($env{'form.phase'} eq 'two') {
+        $javascript = <<"ENDJS";
+<script type="text/javascript">
+// <![CDATA[
+function verifyForm() {
+    var mode = document.fileupload.filetype.options[document.fileupload.filetype.selectedIndex].value
+    if (mode == "testbank") {
+        document.fileupload.action = "/adm/testbank";
+    }
+    if (mode == "imsimport") {
+        document.fileupload.action = "/adm/imsimport";
+    }
+    if (mode == "standard") {
+        document.fileupload.action = "/adm/upload";
+    }
+    document.fileupload.submit();
+}
+// ]]>
+</script>
+ENDJS
+    }
+
+    my $londocroot = $r->dir_config('lonDocRoot');
+    my $trailfile = $fn;
+    $trailfile =~ s{^/(priv/)}{$londocroot/$1};
+
+    # Breadcrumbs
+    my $brcrum = [{'href' => &Apache::loncommon::authorspace($fn),
+                   'text' => 'Construction Space'},
+                  {'href' => '/adm/upload',
+                   'text' => 'Upload file to Construction Space'}];
+    $r->print(&Apache::loncommon::start_page('Upload file to Construction Space',
+                                             $javascript,
+                                             {'bread_crumbs' => $brcrum,})
+             .&Apache::loncommon::head_subbox(
+                &Apache::loncommon::CSTR_pageheader($trailfile))
+    );
+  
+    if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
+        $r->print('<p class="LC_info">'
+                 .&mt('Co-Author [_1]',$uname.':'.$udom)
+                 .'</p>'
+        );
+    }
+    if ($env{'form.phase'} eq 'four') {
+        my $output = &phasefour($r,$fn,$uname,$udom,'author');
+        $r->print($output);
+    } elsif ($env{'form.phase'} eq 'three') {
+        my ($output,$rtnflag) = &phasethree($r,$fn,$uname,$udom,'author');
+        $r->print($output);
+    } elsif ($env{'form.phase'} eq 'two') {
+	my ($output,$returnflag) = &phasetwo($r,$fn);
+        $r->print($output);
+    } else {
+	&phaseone($r,$fn);
+    }
+
+    $r->print(&Apache::loncommon::end_page());
+    return OK;  
+}
+
+1;
+__END__
+
+