--- loncom/publisher/lonupload.pm 2003/02/03 18:03:53 1.15 +++ loncom/publisher/lonupload.pm 2019/03/06 03:39:54 1.70 @@ -1,8 +1,7 @@ - # The LearningOnline Network with CAPA # Handler to upload files into construction space # -# $Id: lonupload.pm,v 1.15 2003/02/03 18:03:53 harris41 Exp $ +# $Id: lonupload.pm,v 1.70 2019/03/06 03:39:54 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,254 +25,8 @@ # # http://www.lon-capa.org/ # -# (Handler to retrieve an old version of a file -# -# (Publication Handler -# -# (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 Gerd Kortemeyer) -# -# 04/05,04/09,05/25,06/23,06/24,08/22 Gerd Kortemeyer -# 11/29 Matthew Hall -# ### -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'}; - $fname=~s/\W//g; - - chop($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) && ($fn!~/\/$/)) { - $r->print( - '
'. - ''. - ''. - 'Store uploaded file as '. - '
'. - '
'); - # Check for bad extension and warn user - if ($fn=~/\.(\w+)$/ && - (&Apache::loncommon::fileembstyle($1) eq 'hdn')) { - $r->print( - ''. - 'The extension on this file, "'.$1. - '", is reserved internally by LON-CAPA.
'. - 'Please change the extension.'. - ''); - } elsif($fn=~/\.(\w+)$/ && - !defined(&Apache::loncommon::fileembstyle($1))) { - $r->print( - ''. - 'The extension on this file, "'.$1. - '", is not recognized by LON-CAPA.
'. - 'Please change the extension.'. - ''); - } - } else { - $r->print('Illegal filename.'); - } - } else { - $r->print('No upload file specified.'); - } -} - -sub phasetwo { - my ($r,$fn,$uname,$udom)=@_; - &Debug($r, "Filename is ".$fn); - if ($fn=~/^\/priv\/$uname\//) { - &Debug($r, "Filename after priv substitution: ".$fn); - my $tfn=$fn; - $tfn=~s/^\/(\~|priv)\/(\w+)//; - &Debug($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')) { - $r->print( - '
'. - 'File '.$fn.' exists. Overwrite? '. - ''. - ''. - ''. - '
'); - } 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')) { - $r->print( - 'File '.$fn.' could not be copied.
'. - ''. - 'The extension on this file is reserved internally by LON-CAPA.'. - ''); - } elsif ($fn=~/\.(\w+)$/ && - !defined(&Apache::loncommon::fileembstyle($1))) { - $r->print( - 'File '.$fn.' could not be copied.
'. - ''. - 'The extension on this file is not recognized by LON-CAPA.'. - ''); - } elsif (copy($source,$target)) { - chmod(0660, $target); # Set permissions to rw-rw---. - $r->print('File copied.'); - $r->print('

View file'); - } else { - $r->print('Failed to copy: '.$!); - } - } - } else { - $r->print( - 'Please pick a filename

'); - &phaseone($r,$fn,$uname,$udom); - } - } else { - $r->print( - 'Please pick a filename

'); - &phaseone($r,$fn,$uname,$udom); - } -} - -# ---------------------------------------------------------------- Main Handler -sub handler { - - my $r=shift; - - my $uname; - my $udom; - - ($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\:\/\/[^\/]+\/(\~|priv\/)(\w+)//; - } 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('LON-CAPA Construction Space'); - - $r->print( - ''); - - - $r->print('

Upload file to Construction Space

'); - - if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) { - $r->print('

Co-Author: '.$uname.' at '.$udom. - '

'); - } - - - if ($ENV{'form.phase'} eq 'two') { - &phasetwo($r,$fn,$uname,$udom); - } else { - &phaseone($r,$fn,$uname,$udom); - } - - $r->print(''); - return OK; -} - -1; -__END__ - =head1 NAME Apache::lonupload - upload files into construction space @@ -316,33 +69,599 @@ 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() + +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() -upfile_store() : Store contents of uploaded file into temporary space. Invoked +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::loncommon(); +use Apache::lonnet; +use HTML::Entities(); +use Apache::lonlocal; +use Apache::lonnet; +use LONCAPA qw(:DEFAULT :match); + +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 $datatoken; + if (($env{'user.name'} =~ /^$match_username$/) && ($env{'user.domain'} =~ /^$match_domain$/)) { + $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}. + '_upload_'.$fname.'_'.time.'_'.$$; + } + return if ($datatoken eq ''); + { + 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,$uname,$udom)=@_; + 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/; + $env{'form.upfile.filename'}=~s/(\s+$|^\s+)//g; + if (!$env{'form.upfile.filename'}) { + $r->print('

'.&mt('No upload file specified.').'

'. + &earlyout($fn,$uname,$udom)); + 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('

'.&mt('Illegal filename.').'

'); + return; + } + # Check if quota exceeded + my $filesize = length($env{'form.upfile'}); + if (!$filesize) { + $r->print('

'. + &mt('Unable to upload [_1]. (size = [_2] bytes)', + ''.$env{'form.upfile.filename'}.'', + $filesize).'
'. + &mt('Either the file you attempted to upload was empty, or your web browser was unable to read its contents.').'
'. + '

'. + &earlyout($fn,$uname,$udom)); + return; + } + $filesize = int($filesize/1000); #expressed in kb + my $output = &Apache::loncommon::excess_filesize_warning($uname,$udom,'author', + $env{'form.upfile.filename'},$filesize,'upload'); + if ($output) { + $r->print($output.&earlyout($fn,$uname,$udom)); + return; + } + +# Split part that I can change from the part that I cannot change + my ($fn1,$fn2)=($fn=~/^(\/priv\/[^\/]+\/[^\/]+\/)(.*)$/); +# Check for pattern: .number.extension which is reserved for LON-CAPA versioning. +# Check for disallowed characters: #?&%:<>`|, and remove + if ($fn2 ne '') { + ($fn2,my $warning) = &check_filename($fn2); + if ($warning ne '') { + $r->print($warning); + } + } + # Display additional options for upload + # and upload button + $r->print( + '
' + .'' + .'' + ); + $r->print( + &Apache::lonhtmlcommon::start_pick_box() + .&Apache::lonhtmlcommon::row_title(&mt('Save uploaded file as')) + .''.$fn1.'' + .'' + .'' + .&Apache::lonhtmlcommon::row_closure() + .&Apache::lonhtmlcommon::row_title(&mt('File Type')) + .''.&Apache::loncommon::help_open_topic("Uploading_File_Options") + .&Apache::lonhtmlcommon::row_closure(1) + .&Apache::lonhtmlcommon::end_pick_box() + ); + $r->print( + '

' + .'' + .'

' + .'
' + ); + + # Check for bad extension and warn user + if ($fn=~/\.(\w+)$/ && + (&Apache::loncommon::fileembstyle($1) eq 'hdn')) { + $r->print('

' + .&mt('The extension on this file, [_1], is reserved internally by LON-CAPA.', + ''.$1.'') + .'
'.&mt('Please change the extension.') + .'

'); + } elsif($fn=~/\.(\w+)$/ && + !defined(&Apache::loncommon::fileembstyle($1))) { + $r->print('

' + .&mt('The extension on this file, [_1], is not recognized by LON-CAPA.', + ''.$1.'') + .'
'.&mt('Please change the extension.') + .'

'); + } +} + +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 $datatoken; + if ($env{'form.datatoken'} =~ /^$match_username\_$match_domain\_upload_\w*_\d+_\d+$/) { + $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 .= '

'.&mt('Upload cancelled.').'

' + .'

'. + &mt('Back to Directory').'

'; + } elsif ((-e $target) && (!$env{'form.override'})) { + $output .= '
' + .'

' + .&mt('File [_1] already exists.', + ''.$fn.'') + .'' + .'' + .'' + .'

' + .'' + .' ' + .'

' + .'
'; + } 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 .= ''. + &mt('Please use browser "Back" button and pick a filename'). + '
'; + } + } else { + $output .= ''. + &mt('Please use browser "Back" button and pick a filename'). + '
'; + } + return ($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 .= '

'. + &mt('File [_1] could not be copied.', + ''.$fn.' '). + '
'. + &mt('The extension on this file is reserved internally by LON-CAPA.'). + '

'; + } elsif ($fn=~/\.(\w+)$/ && + !defined(&Apache::loncommon::fileembstyle($1))) { + $result .= '

'. + &mt('File [_1] could not be copied.', + ''.$fn.' '). + '
'. + &mt('The extension on this file is not recognized by LON-CAPA.'). + '

'; + } elsif (-d $target) { + $result .= '

'. + &mt('File [_1] could not be copied.', + ''.$fn.''). + '
'. + &mt('The target is an existing directory.'). + '

'; + } elsif (copy($source,$target)) { + chmod(0660, $target); # Set permissions to rw-rw---. + if ($mode eq 'testbank' || $mode eq 'imsimport') { + $returnflag = 'ok'; + $result .= '

' + .&mt('Your file - [_1] - was uploaded successfully.', + ''.$fn.'') + .'

'; + } else { + $result .= '

' + .&mt('File copied.') + .'

'; + } + # 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 .= '

'.&mt('Reference Warning').'

'; + if ($num) { + $result .= '

'.&mt('Completed upload of the file.').' '.&mt('This file contained references to other files.').'

'. + '

'.&mt('Please select the locations from which the referenced files are to be uploaded.').'

'. + $embedded; + if ($mode eq 'testbank') { + $returnflag = 'embedded'; + $result .= '

'.&mt('Or [_1]continue[_2] the testbank import without these files.','','').'

'; + } + } else { + $result .= '

'.&mt('Completed upload of the file.').'

'.$embedded; + if ($pathchg) { + if ($mode eq 'testbank') { + $returnflag = 'embedded'; + $result .= '

'.&mt('Or [_1]continue[_2] the testbank import without modifying the reference(s).','','').'

'; + } + } + } + } + } + } + if (($mode ne 'imsimport') && ($mode ne 'testbank')) { + $result .= '
'. + &mt('View file').''; + } + } else { + $result .= &mt('Failed to copy: [_1].',$!); + } + if ($mode ne 'imsimport' && $mode ne 'testbank') { + $result .= '
'. + &mt('Back to Directory').'
'; + } + return ($result,$returnflag); +} + +sub check_filename { + my ($fname) = @_; + my $warning; + if ($fname =~/[#\?&%":<>`|]/) { + $fname =~s/[#\?&%":<>`|]//g; + $warning .= '

' + .&mt('Removed one or more disallowed characters from filename') + .'

'; + } + if ($fname=~ /\.(\d+)\.(\w+)$/) { + my $num = $1; + $warning .= '

' + .&mt('Bad filename [_1]',''.$fname.'') + .'
' + .&mt('[_1](name).(number).(extension)[_2] not allowed.','','') + .'
' + .&mt('Replacing the [_1].number.[_2] with [_1]_letter.[_2] in requested filename.','','') + .'

'; + if ($num eq '0') { + $fname =~ s/\.(\d+)(\.\w+)$/_A$2/; + } else { + my $letts = ''; + my %digletter = reverse &Apache::lonnet::letter_to_digits(); + if ($num >= 100) { + $num = substr($num,-2); + } + foreach my $digit (split('',$num)) { + $letts .= $digletter{$digit}; + } + $fname =~ s/\.(\d+)(\.\w+)$/_$letts$2/; + } + } + if ($fname =~/___/) { + $fname =~s/_+/_/g; + $warning .= '

' + .&mt('Changed ___ to a single _ in filename') + .'

'; + } + return ($fname,$warning); +} + +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 $dirpath = $url_root.$path.'/'; + $dirpath=~s{/+}{/}g; + my $filename = &HTML::Entities::encode($env{'form.filename'},'<>&"'); + my $state = &embedded_form_elems('modify_orightml',$filename,$mode). + ''; + my ($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 .= '

'. + &mt('View main file').'

'. + '

'. + &mt('Back to Directory').'


'; + } + return ($result,$returnflag); +} + +sub embedded_form_elems { + my ($action,$filename,$mode) = @_; + return < + + +STATE +} + +sub phasefour { + my ($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}{}; + my $dirpath = $url_root.$path.'/'; + $dirpath=~s{/+}{/}g; + my $outcome = + &Apache::loncommon::modify_html_refs($mode,$path,$uname,$udom,$dir_root); + $result .= $outcome; + if ($mode ne 'imsimport' && $mode ne 'testbank') { + $result .= '

'. + &mt('View main file').'

'. + '

'. + &mt('Back to Directory').'


'; + } + return $result; +} + +sub earlyout { + my ($fn,$uname,$udom) = @_; + if ($fn =~ m{^(/priv/$udom/$uname(?:.*)/)[^/]*}) { + return &Apache::lonhtmlcommon::actionbox( + [''.&mt('Return to Directory').'']); + } + return; +} + +# ---------------------------------------------------------------- Main Handler +sub handler { + + my $r=shift; + my $javascript = ''; + my $fn; + my $warning; + + if ($env{'form.filename1'}) { + my $fn1 = $env{'form.filename1'}; + my $fn2 = $env{'form.filename2'}; + $fn2 =~ s/(\s+$|^\s+)//g; + $fn2 =~ s/\/+/\//g; + ($fn2,$warning) = &check_filename($fn2); + $fn = $fn1.$fn2; + } else { + $fn = $env{'form.filename'}; + } + $fn=~s/\/+/\//g; + if ($fn =~ m{/\.\./}) { + $warning .= '

' + .&mt('Path modified as a result of one or more instances of /../') + .'

'; + while ($fn =~ m{/\.\./}) { + $fn =~ s{/[^/]+/\.\./}{/}g; + } + } + + unless ($fn) { + $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}. + ' unspecified filename for upload', $r->filename); + return HTTP_NOT_FOUND; + } + + my ($uname,$udom)=&Apache::lonnet::constructaccess($fn); + + unless (($uname) && ($udom)) { + $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}. + ' trying to upload file '.$fn. + ' - 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"; + +ENDJS + } + + my $londocroot = $r->dir_config('lonDocRoot'); + my $trailfile = $fn; + $trailfile =~ s{^/(priv/)}{$londocroot/$1}; + + # Breadcrumbs + my $brcrum = [{'href' => &Apache::loncommon::authorspace($fn), + 'text' => 'Authoring Space'}, + {'href' => '/adm/upload', + 'text' => 'Upload file to Authoring Space'}]; + $r->print(&Apache::loncommon::start_page('Upload file to Authoring 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('

' + .&mt('Co-Author [_1]',$uname.':'.$udom) + .'

' + ); + } + if ($warning) { + $r->print($warning); + } + 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,undef,$uname,$udom); + } + + $r->print(&Apache::loncommon::end_page()); + return OK; +} + +1; +__END__ + +