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Annotation of loncom/publisher/lonretrieve.pm, revision 1.4

1.1       www         1: # The LearningOnline Network with CAPA
                      2: # Handler to retrieve an old version of a file
                      3: #
                      4: # (Publication Handler
                      5: # 
                      6: # (TeX Content Handler
                      7: #
                      8: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
                      9: #
                     10: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
                     11: # 03/23 Guy Albertelli
                     12: # 03/24,03/29 Gerd Kortemeyer)
                     13: #
1.3       www        14: # 03/31,04/03 Gerd Kortemeyer
1.1       www        15: 
                     16: package Apache::lonretrieve;
                     17: 
                     18: use strict;
                     19: use Apache::File;
                     20: use File::Copy;
                     21: use Apache::Constants qw(:common :http :methods);
                     22: 
1.2       www        23: sub phaseone {
                     24:     my ($r,$fn,$uname,$udom)=@_;
                     25:     my $docroot=$r->dir_config('lonDocRoot');
                     26: 
1.3       www        27:     my $urldir='/res/'.$udom.'/'.$uname.$fn;
                     28:     $urldir=~s/\/[^\/]+$/\//;
                     29: 
                     30:     my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
                     31:     my $resdir=$resfn;
1.2       www        32:     $resdir=~s/\/[^\/]+$/\//;
                     33: 
                     34:     $fn=~/^\/(.+)\.(\w+)$/;
                     35:     my $main=$1;
                     36:     my $suffix=$2;
1.3       www        37:   
                     38:     $r->print('<form action=/adm/retrieve method=post>'.
                     39: 	      '<input type=hidden name=filename value="'.$fn.'">'.
                     40:               '<input type=hidden name=phase value=two>'.
                     41:               '<table border=2><tr><th>Select</th><th>Version</th>'.
                     42:               '<th>Became this version on ...</th>'.
                     43:               '<th>Metadata</th></tr>');
1.2       www        44:     my $filename;
                     45:     opendir(DIR,$resdir);
                     46:     while ($filename=readdir(DIR)) {
                     47:         if ($filename=~/^$main\.(\d+)\.$suffix$/) {
1.3       www        48: 	   my $version=$1;
                     49:            my ($rdev,$rino,$rmode,$rnlink,
                     50:                 $ruid,$rgid,$rrdev,$rsize,
                     51:                 $ratime,$rmtime,$rctime,
                     52:                 $rblksize,$rblocks)=stat($resdir.'/'.$filename);
                     53:            $r->print('<tr><td><input type=radio name=version value="'.
                     54:                      $version.'"></td><th>'.$version.'</th><td>'.
                     55:                      localtime($rmtime).'</td><td>'.
                     56:                      '<a href="'.$urldir.$filename.'.meta" target=cat>'.
                     57:                      'Metadata Version '.$version.'</a></td></tr>');
1.2       www        58:         }
                     59:     }
                     60:     closedir(DIR);
1.3       www        61:     my ($rdev,$rino,$rmode,$rnlink,
                     62:         $ruid,$rgid,$rrdev,$rsize,
                     63:         $ratime,$rmtime,$rctime,
                     64:         $rblksize,$rblocks)=stat($resfn);
                     65:     $r->print('<tr><td><input type=radio name=version value="new"></td>'.
                     66:               '<th>Current</th><td>'.localtime($rmtime).
                     67:            '</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
                     68:               'Metadata current version</a></td></tr></table><p>'.
1.4     ! www        69:            '<font size=+1 color=red>Retrieval of an old version will '.
        !            70:            'overwrite the file currently in construction space</font><p>'.
1.3       www        71:            '<input type=submit value="Retrieve version"></form>');
1.2       www        72: }
1.1       www        73: 
1.4     ! www        74: sub phasetwo {
        !            75:     my ($r,$fn,$uname,$udom)=@_;
        !            76:     if ($ENV{'form.version'}) {
        !            77:         my $version=$ENV{'form.version'};
        !            78: 	if ($version eq 'new') {
        !            79: 	    $r->print('<h3>Retrieving current (most recent) version</h3>');
        !            80:         } else {
        !            81:             $r->print('<h3>Retrieving old version '.$version.'</h3>');
        !            82:         }
        !            83:         my $logfile;
        !            84:         my $ctarget='/home/'.$uname.'/public_html'.$fn;
        !            85:         unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
        !            86: 	  $r->print(
        !            87:          '<font color=red>No write permission to user directory, FAIL</font>');
        !            88:         }
        !            89:         print $logfile 
        !            90: "\n\n================= Retrieve ".localtime()." ================\n".
        !            91: "Version $version\n\n";
        !            92: 
        !            93:     } else {
        !            94:        $r->print(
        !            95:    '<font size=+1 color=red>Please pick a version to retrieve</font><p>');
        !            96:        &phaseone($r,$fn,$uname,$udom);
        !            97:     }
        !            98: }
        !            99: 
1.1       www       100: sub handler {
                    101: 
                    102:   my $r=shift;
                    103: 
                    104:   my $fn;
                    105: 
                    106:   if ($ENV{'form.filename'}) {
                    107:       $fn=$ENV{'form.filename'};
1.2       www       108:       $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)//;
1.1       www       109:   } else {
1.2       www       110:      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
                    111:          ' unspecified filename for retrieval', $r->filename); 
                    112:      return HTTP_NOT_FOUND;
1.1       www       113:   }
                    114: 
                    115:   unless ($fn) { 
                    116:      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
1.2       www       117:          ' trying to retrieve non-existing file', $r->filename); 
1.1       www       118:      return HTTP_NOT_FOUND;
                    119:   } 
                    120: 
                    121: # ----------------------------------------------------------- Start page output
                    122: 
                    123:   my $uname=$ENV{'user.name'};
                    124:   my $udom=$ENV{'user.domain'};
                    125: 
                    126:   $r->content_type('text/html');
                    127:   $r->send_http_header;
                    128: 
                    129:   $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
                    130: 
                    131:   $r->print(
                    132:    '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
                    133: 
                    134:   
1.2       www       135:   $r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
1.1       www       136: 
1.2       www       137:   if ($ENV{'form.phase'} eq 'two') {
1.4     ! www       138:       &phasetwo($r,$fn,$uname,$udom);
1.2       www       139:   } else {
                    140:       &phaseone($r,$fn,$uname,$udom);
                    141:   }
1.1       www       142: 
                    143:   $r->print('</body></html>');
                    144:   return OK;  
                    145: }