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    1: # The LearningOnline Network with CAPA
    2: # Handler to upload files into construction space
    3: #
    4: # $Id: lonupload.pm,v 1.70 2019/03/06 03:39:54 raeburn Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: ###
   29: 
   30: =head1 NAME
   31: 
   32: Apache::lonupload - upload files into construction space
   33: 
   34: =head1 SYNOPSIS
   35: 
   36: Invoked by /etc/httpd/conf/srm.conf:
   37: 
   38:  <Location /adm/upload>
   39:  PerlAccessHandler       Apache::lonacc
   40:  SetHandler perl-script
   41:  PerlHandler Apache::lonupload
   42:  ErrorDocument     403 /adm/login
   43:  ErrorDocument     404 /adm/notfound.html
   44:  ErrorDocument     406 /adm/unauthorized.html
   45:  ErrorDocument	  500 /adm/errorhandler
   46:  </Location>
   47: 
   48: =head1 INTRODUCTION
   49: 
   50: This module uploads a file sitting on a client computer into 
   51: library server construction space.
   52: 
   53: This is part of the LearningOnline Network with CAPA project
   54: described at http://www.lon-capa.org.
   55: 
   56: =head1 HANDLER SUBROUTINE
   57: 
   58: This routine is called by Apache and mod_perl.
   59: 
   60: =over 4
   61: 
   62: =item *
   63: 
   64: Initialize variables
   65: 
   66: =item *
   67: 
   68: Start page output
   69: 
   70: =item *
   71: 
   72: output relevant interface phase (phaseone, phasetwo, phasethree or phasefour)
   73: 
   74: =item *
   75: 
   76: (phase one is to specify upload file; phase two is to handle conditions
   77: subsequent to specification--like overwriting an existing file; phase three
   78: is to handle processing of secondary uploads - of embedded objects in an
   79: html file).
   80: 
   81: =back
   82: 
   83: =head1 OTHER SUBROUTINES
   84: 
   85: =over
   86: 
   87: =item phaseone()
   88: 
   89: Interface for specifying file to upload.
   90: 
   91: =item phasetwo()
   92: 
   93: Interface for handling post-conditions about uploading (such
   94: as overwriting an existing file).
   95: 
   96: =item phasethree()
   97: 
   98: Interface for handling secondary uploads of embedded objects
   99: in an html file.
  100: 
  101: =item phasefour()
  102: 
  103: Interface for handling optional renaming of links to embedded
  104: objects. 
  105: 
  106: =item upfile_store()
  107: 
  108: Store contents of uploaded file into temporary space.  Invoked
  109: by phaseone subroutine.
  110: 
  111: =item check_extension()
  112: 
  113: Checks if filename extension is permitted and checks type
  114:  of file - if html file, calls parser to check for embedded objects.
  115:  Invoked by phasetwo subroutine.
  116: 
  117: =back
  118: 
  119: =cut
  120: 
  121: package Apache::lonupload;
  122: 
  123: use strict;
  124: use Apache::File;
  125: use File::Copy;
  126: use File::Basename;
  127: use Apache::Constants qw(:common :http :methods);
  128: use Apache::loncommon();
  129: use Apache::lonnet;
  130: use HTML::Entities();
  131: use Apache::lonlocal;
  132: use Apache::lonnet;
  133: use LONCAPA qw(:DEFAULT :match);
  134: 
  135: my $DEBUG=0;
  136: 
  137: sub Debug {
  138:     # Put out the indicated message but only if DEBUG is true.
  139:     if ($DEBUG) {
  140: 	my ($r,$message) = @_;
  141: 	$r->log_reason($message);
  142:     }
  143: }
  144: 
  145: sub upfile_store {
  146:     my $r=shift;
  147: 	
  148:     my $fname=$env{'form.upfile.filename'};
  149:     $fname=~s/\W//g;
  150:     
  151:     chomp($env{'form.upfile'});
  152:   
  153:     my $datatoken;
  154:     if (($env{'user.name'} =~ /^$match_username$/) && ($env{'user.domain'} =~ /^$match_domain$/)) {
  155:         $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
  156:                    '_upload_'.$fname.'_'.time.'_'.$$;
  157:     }
  158:     return if ($datatoken eq '');
  159:     {
  160:        my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
  161:                                    '/tmp/'.$datatoken.'.tmp');
  162:        print $fh $env{'form.upfile'};
  163:     }
  164:     return $datatoken;
  165: }
  166: 
  167: sub phaseone {
  168:     my ($r,$fn,$mode,$uname,$udom)=@_;
  169:     my $action = '/adm/upload';
  170:     if ($mode eq 'testbank') {
  171:         $action = '/adm/testbank';
  172:     } elsif ($mode eq 'imsimport') {
  173:         $action = '/adm/imsimport';
  174:     }
  175: 
  176:     # Check for file to be uploaded
  177:     $env{'form.upfile.filename'}=~s/\\/\//g;
  178:     $env{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
  179:     $env{'form.upfile.filename'}=~s/(\s+$|^\s+)//g;
  180:     if (!$env{'form.upfile.filename'}) {
  181:         $r->print('<p class="LC_warning">'.&mt('No upload file specified.').'</p>'.
  182:                   &earlyout($fn,$uname,$udom));
  183:         return;
  184:     }
  185: 
  186:     # Append the name of the uploaded file
  187:     $fn.=$env{'form.upfile.filename'};
  188:     $fn=~s/(\/)+/\//g;
  189: 
  190:     # Check for illegal filename
  191:     &Debug($r, "Filename for upload: $fn");
  192:     if (!(($fn) && ($fn!~/\/$/))) {
  193:         $r->print('<p class="LC_warning">'.&mt('Illegal filename.').'</p>');
  194:         return;
  195:     }
  196:     # Check if quota exceeded
  197:     my $filesize = length($env{'form.upfile'});
  198:     if (!$filesize) {
  199:         $r->print('<p class="LC_warning">'.
  200:                   &mt('Unable to upload [_1]. (size = [_2] bytes)',
  201:                       '<span class="LC_filename">'.$env{'form.upfile.filename'}.'</span>',
  202:                       $filesize).'<br />'.
  203:                   &mt('Either the file you attempted to upload was empty, or your web browser was unable to read its contents.').'<br />'.
  204:                   '</p>'.
  205:                   &earlyout($fn,$uname,$udom));
  206:         return;
  207:     }
  208:     $filesize = int($filesize/1000); #expressed in kb
  209:     my $output = &Apache::loncommon::excess_filesize_warning($uname,$udom,'author',
  210:                                                              $env{'form.upfile.filename'},$filesize,'upload');
  211:     if ($output) {
  212:         $r->print($output.&earlyout($fn,$uname,$udom));
  213:         return;
  214:     }
  215: 
  216: # Split part that I can change from the part that I cannot change
  217:     my ($fn1,$fn2)=($fn=~/^(\/priv\/[^\/]+\/[^\/]+\/)(.*)$/);
  218: # Check for pattern: .number.extension which is reserved for LON-CAPA versioning. 
  219: # Check for disallowed characters: #?&%:<>`|, and remove
  220:     if ($fn2 ne '') {
  221:         ($fn2,my $warning) = &check_filename($fn2);
  222:         if ($warning ne '') {
  223:             $r->print($warning);
  224:         }
  225:     }
  226:     # Display additional options for upload
  227:     # and upload button
  228:     $r->print(
  229:         '<form action="'.$action.'" method="post" name="fileupload">'
  230:        .'<input type="hidden" name="phase" value="two" />'
  231:        .'<input type="hidden" name="datatoken" value="'.&upfile_store.'" />'
  232:     );
  233:     $r->print(
  234:         &Apache::lonhtmlcommon::start_pick_box()
  235:        .&Apache::lonhtmlcommon::row_title(&mt('Save uploaded file as'))
  236:        .'<span class="LC_filename">'.$fn1.'</span>'
  237:        .'<input type="hidden" name="filename1" value="'.$fn1.'" />'
  238:        .'<input type="text" size="50" name="filename2" value="'.$fn2.'" />'
  239:        .&Apache::lonhtmlcommon::row_closure()
  240:        .&Apache::lonhtmlcommon::row_title(&mt('File Type'))
  241:        .'<select name="filetype">'
  242:        .'<option value="standard" selected="selected">'.&mt('Regular file').'</option>'
  243:        .'<option value="testbank">'.&mt('Testbank file').'</option>'
  244:        .'<option value="imsimport">'.&mt('IMS package').'</option>'
  245:        .'</select>'.&Apache::loncommon::help_open_topic("Uploading_File_Options")
  246:        .&Apache::lonhtmlcommon::row_closure(1)
  247:        .&Apache::lonhtmlcommon::end_pick_box()
  248:     );
  249:     $r->print(
  250:         '<p>'
  251:        .'<input type="button" value="'.&mt('Upload').'" onclick="javascript:verifyForm()"/>'
  252:        .'</p>'
  253:        .'</form>'
  254:     );
  255: 
  256:    # Check for bad extension and warn user
  257:     if ($fn=~/\.(\w+)$/ && 
  258:         (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
  259:                 $r->print('<p class="LC_error">'
  260:                           .&mt('The extension on this file, [_1], is reserved internally by LON-CAPA.',
  261:                                '<span class="LC_filename">'.$1.'</span>')
  262:                           .' <br />'.&mt('Please change the extension.')
  263:                           .'</p>');
  264:     } elsif($fn=~/\.(\w+)$/ && 
  265:                     !defined(&Apache::loncommon::fileembstyle($1))) {
  266:                 $r->print('<p class="LC_error">'
  267:                          .&mt('The extension on this file, [_1], is not recognized by LON-CAPA.',
  268:                               '<span class="LC_filename">'.$1.'</span>')
  269:                          .' <br />'.&mt('Please change the extension.')
  270:                          .'</p>');
  271:     }
  272: }
  273: 
  274: sub phasetwo {
  275:     my ($r,$fn,$mode)=@_;
  276: 
  277:     my $output;
  278:     my $action = '/adm/upload';
  279:     my $returnflag = '';
  280:     if ($mode eq 'testbank') {
  281:         $action = '/adm/testbank';
  282:     } elsif ($mode eq 'imsimport') {
  283:         $action = '/adm/imsimport';
  284:     }
  285:     $fn=~s/\/+/\//g;
  286:     if ($fn) {
  287: 	my $target= $r->dir_config('lonDocRoot').'/'.$fn;
  288: 	&Debug($r, "target -> ".$target);
  289: #     target is the full filesystem path of the destination file.
  290: 	my $base = &File::Basename::basename($fn);
  291: 	my $path = &File::Basename::dirname($fn);
  292: 	$base    = &HTML::Entities::encode($base,'<>&"');
  293: 	my $url  = $path."/".$base;
  294: 	&Debug($r, "URL is now ".$url);
  295: 	my $datatoken;
  296:         if ($env{'form.datatoken'} =~ /^$match_username\_$match_domain\_upload_\w*_\d+_\d+$/) {
  297:             $datatoken = $env{'form.datatoken'};
  298:         }
  299: 	if (($fn) && ($datatoken)) {
  300:             if ($env{'form.cancel'}) {
  301:                 my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
  302:                 my $dirpath=$path.'/';
  303:                 $dirpath=~s/\/+/\//g;
  304:                 $output .= '<p class="LC_warning">'.&mt('Upload cancelled.').'</p>'
  305:                           .'<p><a href="'.$dirpath.'">'.
  306:                           &mt('Back to Directory').'</a></p>';
  307:             } elsif ((-e $target) && (!$env{'form.override'})) {
  308:                 $output .= '<form action="'.$action.'" method="post">'
  309:                           .'<p class="LC_warning">'
  310:                           .&mt('File [_1] already exists.',
  311:                                '<span class="LC_filename">'.$fn.'</span>')
  312:                          .'<input type="hidden" name="phase" value="two" />'
  313:                          .'<input type="hidden" name="filename" value="'.$url.'" />'
  314:                          .'<input type="hidden" name="datatoken" value="'.$datatoken.'" />'
  315:                          .'<p>'
  316:                          .'<input type="submit" name="cancel" value="'.&mt('Cancel').'" />'
  317:                          .' <input type="submit" name="override" value="'.&mt('Overwrite').'" />'
  318:                          .'</p>'
  319:                          .'</form>';
  320:             } else {
  321: 		my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
  322: 		my $dirpath=$path.'/';
  323: 		$dirpath=~s/\/+/\//g;
  324: 		# Check for bad extension and disallow upload
  325:                 my $result;
  326:                 ($result,$returnflag) = &check_extension($fn,$mode,$source,$target,$action,$dirpath,$url);
  327:                 $output .= $result;
  328: 	    }
  329: 	} else {
  330: 	    $output .= '<span class="LC_error">'.
  331: 		      &mt('Please use browser "Back" button and pick a filename').
  332: 		      '</span><br />';
  333: 	}
  334:     } else {
  335: 	$output .= '<span class="LC_error">'.
  336: 		   &mt('Please use browser "Back" button and pick a filename').
  337: 		   '</span><br />';
  338:     }
  339:     return ($output,$returnflag);
  340: }
  341: 
  342: sub check_extension {
  343:     my ($fn,$mode,$source,$target,$action,$dirpath,$url) = @_;
  344:     my ($result,$returnflag);
  345:     # Check for bad extension and disallow upload
  346:     if ($fn=~/\.(\w+)$/ &&
  347:         (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
  348:         $result .= '<p class="LC_warning">'.
  349:                    &mt('File [_1] could not be copied.',
  350:                        '<span class="LC_filename">'.$fn.'</span> ').
  351:                    '<br />'.
  352:                    &mt('The extension on this file is reserved internally by LON-CAPA.').
  353:                    '</p>';
  354:     } elsif ($fn=~/\.(\w+)$/ &&
  355:              !defined(&Apache::loncommon::fileembstyle($1))) {
  356:         $result .= '<p class="LC_warning">'.
  357:                    &mt('File [_1] could not be copied.',
  358:                        '<span class="LC_filename">'.$fn.'</span> ').
  359:                    '<br />'.
  360:                    &mt('The extension on this file is not recognized by LON-CAPA.').
  361:                    '</p>';
  362:     } elsif (-d $target) {
  363:         $result .= '<p class="LC_warning">'.
  364:                    &mt('File [_1] could not be copied.',
  365:                        '<span class="LC_filename">'.$fn.'</span>').
  366:                    '<br />'.
  367:                    &mt('The target is an existing directory.').
  368:                    '</p>';
  369:     } elsif (copy($source,$target)) {
  370:         chmod(0660, $target); # Set permissions to rw-rw---.
  371:         if ($mode eq 'testbank' || $mode eq 'imsimport') {
  372:             $returnflag = 'ok';
  373:             $result .= '<p class="LC_success">'
  374:                       .&mt('Your file - [_1] - was uploaded successfully.',
  375:                            '<span class="LC_filename">'.$fn.'<span>')
  376:                       .'</p>';
  377:         } else {
  378:             $result .= '<p class="LC_success">'
  379:                       .&mt('File copied.')  
  380:                       .'</p>';
  381:         }
  382:         # Check for embedded objects.
  383:         my (%allfiles,%codebase);
  384:         my ($text,$header,$css,$js);
  385:         if (($mode ne 'imsimport') && ($target =~ /\.(htm|html|shtml)$/i)) {
  386:             my (%allfiles,%codebase);
  387:             &Apache::lonnet::extract_embedded_items($target,\%allfiles,\%codebase);
  388:             if (keys(%allfiles) > 0) {
  389:                 my ($currentpath) = ($url =~ m{^(.+)/[^/]+$});
  390:                 my $state = &embedded_form_elems('upload_embedded',$url,$mode);
  391:                 my ($embedded,$num,$pathchg) = 
  392:                     &Apache::loncommon::ask_for_embedded_content($action,$state,\%allfiles,
  393:                                                                  \%codebase,
  394:                                                                  {'error_on_invalid_names'   => 1,
  395:                                                                   'ignore_remote_references' => 1,
  396:                                                                   'current_path'             => $currentpath});
  397:                 if ($embedded) {
  398:                     $result .= '<h3>'.&mt('Reference Warning').'</h3>';
  399:                     if ($num) {
  400:                         $result .= '<p>'.&mt('Completed upload of the file.').' '.&mt('This file contained references to other files.').'</p>'.
  401:                                    '<p>'.&mt('Please select the locations from which the referenced files are to be uploaded.').'</p>'.
  402:                                    $embedded;
  403:                         if ($mode eq 'testbank') {
  404:                             $returnflag = 'embedded';
  405:                             $result .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without these files.','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
  406:                         }
  407:                     } else {
  408:                         $result .= '<p>'.&mt('Completed upload of the file.').'</p>'.$embedded;
  409:                         if ($pathchg) {
  410:                             if ($mode eq 'testbank') {
  411:                                 $returnflag = 'embedded';
  412:                                 $result .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without modifying the reference(s).','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
  413:                             }
  414:                         }
  415:                     }
  416:                 }
  417:             }
  418:         }
  419:         if (($mode ne 'imsimport') && ($mode ne 'testbank')) {
  420:             $result .= '<br /><a href="'.$url.'">'.
  421:                         &mt('View file').'</a>';
  422:         }
  423:     } else {
  424:         $result .= &mt('Failed to copy: [_1].',$!);
  425:     }
  426:     if ($mode ne 'imsimport' && $mode ne 'testbank') {
  427:         $result .= '<br /><a href="'.$dirpath.'">'.
  428:                    &mt('Back to Directory').'</a><br />';
  429:     }
  430:     return ($result,$returnflag);
  431: }
  432: 
  433: sub check_filename {
  434:     my ($fname) = @_;
  435:     my $warning;
  436:     if ($fname =~/[#\?&%":<>`|]/) {
  437:         $fname =~s/[#\?&%":<>`|]//g;
  438:         $warning .= '<p class="LC_warning">'
  439:                    .&mt('Removed one or more disallowed characters from filename')
  440:                    .'</p>';
  441:     }
  442:     if ($fname=~ /\.(\d+)\.(\w+)$/) {
  443:         my $num = $1;
  444:         $warning .= '<p class="LC_warning">'
  445:                    .&mt('Bad filename [_1]','<span class="LC_filename">'.$fname.'</span>')
  446:                    .'<br />'
  447:                    .&mt('[_1](name).(number).(extension)[_2] not allowed.','<tt>','</tt>')
  448:                    .'<br />'
  449:                    .&mt('Replacing the [_1].number.[_2] with [_1]_letter.[_2] in requested filename.','<tt>','</tt>')
  450:                    .'</p>';
  451:         if ($num eq '0') {
  452:             $fname =~ s/\.(\d+)(\.\w+)$/_A$2/;
  453:         } else {
  454:             my $letts = '';
  455:             my %digletter = reverse &Apache::lonnet::letter_to_digits();
  456:             if ($num >= 100) {
  457:                 $num = substr($num,-2);
  458:             }
  459:             foreach my $digit (split('',$num)) {
  460:                 $letts .= $digletter{$digit};
  461:             }
  462:             $fname =~ s/\.(\d+)(\.\w+)$/_$letts$2/;
  463:         }
  464:     }
  465:     if ($fname =~/___/) {
  466:         $fname =~s/_+/_/g;
  467:         $warning .= '<p class="LC_warning">'
  468:                     .&mt('Changed ___ to a single _ in filename')
  469:                     .'</p>';
  470:     }
  471:     return ($fname,$warning);
  472: }
  473: 
  474: sub phasethree {
  475:     my ($r,$fn,$uname,$udom,$mode) = @_;
  476: 
  477:     my $action = '/adm/upload'; 
  478:     if ($mode eq 'testbank') {
  479:         $action = '/adm/testbank';
  480:     } elsif ($mode eq 'imsimport') {
  481:         $action = '/adm/imsimport';
  482:     }
  483:     my $url_root = "/priv/$udom/$uname";
  484:     my $dir_root = $r->dir_config('lonDocRoot').$url_root;
  485:     my $path = &File::Basename::dirname($fn);
  486:     $path =~ s{^\Q$url_root\E}{};
  487:     my $dirpath = $url_root.$path.'/';
  488:     $dirpath=~s{/+}{/}g;
  489:     my $filename = &HTML::Entities::encode($env{'form.filename'},'<>&"');
  490:     my $state = &embedded_form_elems('modify_orightml',$filename,$mode).
  491:                 '<input type="hidden" name="phase" value="four" />';
  492:     my ($result,$returnflag) = 
  493:         &Apache::loncommon::upload_embedded($mode,$path,$uname,$udom,
  494:                                             $dir_root,$url_root,undef,
  495:                                             undef,undef,$state,$action);
  496:     if ($mode ne 'imsimport' && $mode ne 'testbank') {
  497:         $result .= '<br /><h3><a href="'.$fn.'">'.
  498:                   &mt('View main file').'</a></h3>'.
  499:                   '<h3><a href="'.$dirpath.'">'.
  500:                   &mt('Back to Directory').'</a></h3><br />';
  501:     }
  502:     return ($result,$returnflag);
  503: }
  504: 
  505: sub embedded_form_elems {
  506:     my ($action,$filename,$mode) = @_;
  507:     return <<STATE;
  508:     <input type="hidden" name="action" value="$action" />
  509:     <input type="hidden" name="mode" value="$mode" />
  510:     <input type="hidden" name="filename" value="$filename" />
  511: STATE
  512: }
  513: 
  514: sub phasefour {
  515:     my ($r,$fn,$uname,$udom,$mode) = @_;
  516: 
  517:     my $action = '/adm/upload';
  518:     if ($mode eq 'testbank') {
  519:         $action = '/adm/testbank';
  520:     } elsif ($mode eq 'imsimport') {
  521:         $action = '/adm/imsimport';
  522:     }
  523:     my $result;
  524:     my $url_root = "/priv/$udom/$uname";
  525:     my $dir_root = $r->dir_config('lonDocRoot').$url_root;
  526:     my $path = &File::Basename::dirname($fn);
  527:     $path =~ s{^\Q$url_root\E}{};
  528:     my $dirpath = $url_root.$path.'/';
  529:     $dirpath=~s{/+}{/}g;
  530:     my $outcome = 
  531:         &Apache::loncommon::modify_html_refs($mode,$path,$uname,$udom,$dir_root);
  532:     $result .= $outcome;
  533:     if ($mode ne 'imsimport' && $mode ne 'testbank') {
  534:         $result .= '<br /><h3><a href="'.$fn.'">'.
  535:                   &mt('View main file').'</a></h3>'.
  536:                   '<h3><a href="'.$dirpath.'">'.
  537:                   &mt('Back to Directory').'</a></h3><br />';
  538:     }
  539:     return $result;
  540: }
  541: 
  542: sub earlyout {
  543:     my ($fn,$uname,$udom) = @_;
  544:     if ($fn =~ m{^(/priv/$udom/$uname(?:.*)/)[^/]*}) {
  545:         return &Apache::lonhtmlcommon::actionbox(
  546:                ['<a href="'.$1.'">'.&mt('Return to Directory').'</a>']);
  547:     }
  548:     return;
  549: }
  550: 
  551: # ---------------------------------------------------------------- Main Handler
  552: sub handler {
  553: 
  554:     my $r=shift;
  555:     my $javascript = '';
  556:     my $fn;
  557:     my $warning;
  558: 
  559:     if ($env{'form.filename1'}) {
  560:         my $fn1 = $env{'form.filename1'};
  561:         my $fn2 = $env{'form.filename2'};
  562:         $fn2 =~ s/(\s+$|^\s+)//g;
  563:         $fn2 =~ s/\/+/\//g;
  564:         ($fn2,$warning) = &check_filename($fn2);
  565:         $fn = $fn1.$fn2;
  566:     } else {
  567:         $fn = $env{'form.filename'};
  568:     }
  569:     $fn=~s/\/+/\//g;
  570:     if ($fn =~ m{/\.\./}) {
  571:         $warning .= '<p class="LC_warning">'
  572:                    .&mt('Path modified as a result of one or more instances of /../')
  573:                    .'</p>';
  574:         while ($fn =~ m{/\.\./}) {
  575:             $fn =~ s{/[^/]+/\.\./}{/}g;
  576:         }
  577:     }
  578: 
  579:     unless ($fn) {
  580:         $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
  581:                        ' unspecified filename for upload', $r->filename);
  582:         return HTTP_NOT_FOUND;
  583:     }
  584: 
  585:     my ($uname,$udom)=&Apache::lonnet::constructaccess($fn);
  586: 
  587:     unless (($uname) && ($udom)) {
  588:         $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
  589:                        ' trying to upload file '.$fn.
  590:                        ' - not authorized',
  591:                        $r->filename);
  592:         return HTTP_NOT_ACCEPTABLE;
  593:     }
  594: 
  595: # ----------------------------------------------------------- Start page output
  596: 
  597:     &Apache::loncommon::content_type($r,'text/html');
  598:     $r->send_http_header;
  599: 
  600:     unless ($env{'form.phase'} eq 'two') {
  601:         $javascript = <<"ENDJS";
  602: <script type="text/javascript">
  603: // <![CDATA[
  604: function verifyForm() {
  605:     var mode = document.fileupload.filetype.options[document.fileupload.filetype.selectedIndex].value
  606:     if (mode == "testbank") {
  607:         document.fileupload.action = "/adm/testbank";
  608:     }
  609:     if (mode == "imsimport") {
  610:         document.fileupload.action = "/adm/imsimport";
  611:     }
  612:     if (mode == "standard") {
  613:         document.fileupload.action = "/adm/upload";
  614:     }
  615:     document.fileupload.submit();
  616: }
  617: // ]]>
  618: </script>
  619: ENDJS
  620:     }
  621: 
  622:     my $londocroot = $r->dir_config('lonDocRoot');
  623:     my $trailfile = $fn;
  624:     $trailfile =~ s{^/(priv/)}{$londocroot/$1};
  625: 
  626:     # Breadcrumbs
  627:     my $brcrum = [{'href' => &Apache::loncommon::authorspace($fn),
  628:                    'text' => 'Authoring Space'},
  629:                   {'href' => '/adm/upload',
  630:                    'text' => 'Upload file to Authoring Space'}];
  631:     $r->print(&Apache::loncommon::start_page('Upload file to Authoring Space',
  632:                                              $javascript,
  633:                                              {'bread_crumbs' => $brcrum,})
  634:              .&Apache::loncommon::head_subbox(
  635:                 &Apache::loncommon::CSTR_pageheader($trailfile))
  636:     );
  637:   
  638:     if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
  639:         $r->print('<p class="LC_info">'
  640:                  .&mt('Co-Author [_1]',$uname.':'.$udom)
  641:                  .'</p>'
  642:         );
  643:     }
  644:     if ($warning) {
  645:         $r->print($warning);
  646:     }
  647:     if ($env{'form.phase'} eq 'four') {
  648:         my $output = &phasefour($r,$fn,$uname,$udom,'author');
  649:         $r->print($output);
  650:     } elsif ($env{'form.phase'} eq 'three') {
  651:         my ($output,$rtnflag) = &phasethree($r,$fn,$uname,$udom,'author');
  652:         $r->print($output);
  653:     } elsif ($env{'form.phase'} eq 'two') {
  654: 	my ($output,$returnflag) = &phasetwo($r,$fn);
  655:         $r->print($output);
  656:     } else {
  657: 	&phaseone($r,$fn,undef,$uname,$udom);
  658:     }
  659: 
  660:     $r->print(&Apache::loncommon::end_page());
  661:     return OK;
  662: }
  663: 
  664: 1;
  665: __END__
  666: 
  667: