Diff for /rat/lonambiguous.pm between versions 1.11 and 1.22

version 1.11, 2004/12/17 22:40:24 version 1.22, 2008/11/11 16:06:46
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # (TeX Content Handler  
 #  
 # 05/29/00,05/30,10/11 Gerd Kortemeyer)  =head1 NAME
 #  
 # 10/11,10/12,10/16 Gerd Kortemeyer  Apache::lonambiguous
   
   =head1 SYNOPSIS
   
   Handler to resolve ambiguous file locations.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 HANDLER SUBROUTINE
   
   make_symb()
   
   and
   
   handler()
   
   =head1 OTHER SUBROUTINES
   
   =over
   
   =item *
   
   cleanup()
   
   =item *
   
   getlost()
   
   =back
   
   =cut
   
 package Apache::lonambiguous;  package Apache::lonambiguous;
   
Line 49  sub cleanup { Line 80  sub cleanup {
     &Apache::lonnet::logthis('Failed cleanup ambiguous: bighash');      &Apache::lonnet::logthis('Failed cleanup ambiguous: bighash');
         }          }
     }      }
       return OK;
 }  }
   
 # ----------------------------------------------------------- Could not resolve  # ----------------------------------------------------------- Could not resolve
Line 56  sub cleanup { Line 88  sub cleanup {
 sub getlost {  sub getlost {
     my ($r,$errmsg)=@_;      my ($r,$errmsg)=@_;
     $errmsg=&mt($errmsg);      $errmsg=&mt($errmsg);
     $r->content_type('text/html');      &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;      $r->send_http_header;
     $r->print(      $r->print(&Apache::loncommon::start_page('Could not handle ambiguous resource reference').
  '<head><title>Unknown Error</title></head>'.        $errmsg.
   &Apache::loncommon::bodytag('Could not handle ambiguous resource reference').        &Apache::loncommon::end_page());
   $errmsg.  
  '</body></html>');  
 }  }
   
 # ================================================================ Main Handler  # ================================================================ Main Handler
Line 87  sub handler { Line 117  sub handler {
   
 # ---------------------------------------------------------- Is this selecting?  # ---------------------------------------------------------- Is this selecting?
     
    if ($ENV{'form.selecturl'}) {     if ($env{'form.selecturl'}) {
        my $envkey;         my $envkey;
        if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',         if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                     &GDBM_READER(),0640)) {                      &GDBM_READER(),0640)) {
           foreach $envkey (keys %ENV) {            foreach $envkey (keys %env) {
              if ($envkey=~/^form\.(\d+)\.(\d+)$/) {               if ($envkey=~/^form\.(\d+)\.(\d+)$/) {
 # ---------------------------------------------------- Update symb and redirect  # ---------------------------------------------------- Update symb and redirect
          my $mapid=$1;           my $mapid=$1;
                  my $resid=$2;                   my $resid=$2;
                  my $resurl=$bighash{'src_'.$mapid.'.'.$resid};                   my $resurl=$bighash{'src_'.$mapid.'.'.$resid};
                  &Apache::lonnet::symblist($bighash{'map_id_'.$mapid},                   &Apache::lonnet::symblist($bighash{'map_id_'.$mapid},
            $resurl => $resid);             $resurl => [$resurl,$resid]);
                  untie(%bighash);                   untie(%bighash);
                  $r->header_out(Location =>                    $r->header_out(Location => 
                                 'http://'.$ENV{'HTTP_HOST'}.$resurl);   &Apache::lonnet::absolute_url().$resurl);
                  return REDIRECT;                   return REDIRECT;
              }               }
   }    }
Line 115  sub handler { Line 145  sub handler {
 # ---------------------------------------------------------- Do we have a case?  # ---------------------------------------------------------- Do we have a case?
   
    my $thisfn;     my $thisfn;
    unless (($thisfn=$ENV{'request.ambiguous'})&&($ENV{'request.course.fn'})) {     unless (($thisfn=$env{'request.ambiguous'})&&($env{'request.course.fn'})) {
        &getlost($r,'Could not find information on resource.');         &getlost($r,'Could not find information on resource.');
        return OK;         return OK;
    }     }
Line 126  sub handler { Line 156  sub handler {
     my %hash;      my %hash;
     my $syval='';      my $syval='';
           
     if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',      if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                   &GDBM_READER(),0640)) {                    &GDBM_READER(),0640)) {
        $syval=$hash{$thisfn};         $syval=$hash{$thisfn};
        untie(%hash);         untie(%hash);
Line 135  sub handler { Line 165  sub handler {
 # ---------------------------------------------------------- There was an entry  # ---------------------------------------------------------- There was an entry
   
     if ($syval) {      if ($syval) {
    my ($page,undef,$res)=&Apache::lonnet::decode_symb($syval);
        if ($syval=~/\_$/) {   if ($res eq 'page') {
 # ----------------------------------- Okay, this should have appeared on a page  # ----------------------------------- Okay, this should have appeared on a page
    $syval=~s/\_\_\_$//;     &Apache::loncommon::content_type($r,'text/html');
     $r->content_type('text/html');  
            $r->header_out(Location =>              $r->header_out(Location => 
                 'http://'.$ENV{'HTTP_HOST'}.'/res/'.$syval);    &Apache::lonnet::absolute_url().
     &Apache::lonnet::clutter($page));
            return REDIRECT;             return REDIRECT;
        } else {         } else {
 #  There is not really a problem (???), but cannot go back without endless loop  #  There is not really a problem (???), but cannot go back without endless loop
Line 149  sub handler { Line 179  sub handler {
            return OK;             return OK;
        }         }
     }      }
   # ------------------------------------Encrypted requests go straight to navmaps
      if ($env{'request.enc'}) {
          &Apache::loncommon::content_type($r,'text/html');
          $r->header_out(Location => 
         &Apache::lonnet::absolute_url().'/adm/navmaps');
          return REDIRECT;
      }
 # ------------------------------------------------ Would be standalone resource  # ------------------------------------------------ Would be standalone resource
   
    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',     if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                     &GDBM_READER(),0640)) {                      &GDBM_READER(),0640)) {
 # ---------------------------------------------- Get ID(s) for current resource  # ---------------------------------------------- Get ID(s) for current resource
       my $ids=$bighash{'ids_'.&Apache::lonnet::clutter($thisfn)};        my $ids=$bighash{'ids_'.&Apache::lonnet::clutter($thisfn)};
Line 173  sub handler { Line 209  sub handler {
  }   }
          if ($couldbe) {           if ($couldbe) {
             @possibilities=split(/\,/,$couldbe);              @possibilities=split(/\,/,$couldbe);
       if ($#possibilities==0) {
    my $id=$possibilities[0];
    my $resurl=$bighash{'src_'.$id};
    my $mapurl=$bighash{'map_id_'.(split(/\./,$id))[0]};
    my $symb=&make_symb($id);
    &Apache::loncommon::content_type($r,'text/html');
    $r->header_out(Location => 
          &Apache::lonnet::absolute_url().
          $resurl.'?symb='.$symb);
    return REDIRECT;
       }
             if ($#possibilities>0) {              if ($#possibilities>0) {
 # ----------------------------------------------- Okay, really multiple choices  # ----------------------------------------------- Okay, really multiple choices
                $r->content_type('text/html');         &Apache::loncommon::content_type($r,'text/html');
                $r->send_http_header;                 $r->send_http_header;
                my $bodytag=                 my $start_page=
                       &Apache::loncommon::bodytag('Pick Instance of Resource');     &Apache::loncommon::start_page('Pick Instance of Resource');
                $r->print(<<ENDSTART);                 $r->print(<<ENDSTART);
 <head><title>Choose Location</title></head>  $start_page
 $bodytag  
 The resource you had been accessing appears more than once in this course,  The resource you had been accessing appears more than once in this course,
 and LON-CAPA has insufficient session information to determine which instance  and LON-CAPA has insufficient session information to determine which instance
 of the resource you meant.  of the resource you meant.
Line 201  ENDSTART Line 247  ENDSTART
      &Apache::lonnet::gettitle($mapurl).'&nbsp;'.       &Apache::lonnet::gettitle($mapurl).'&nbsp;'.
      '</td></tr>');       '</td></tr>');
                } @possibilities;                 } @possibilities;
                $r->print('</table></body></html>');                 $r->print('</table>'.&Apache::loncommon::end_page());
        untie(%bighash);         untie(%bighash);
                return OK;                 return OK;
             }              }

Removed from v.1.11  
changed lines
  Added in v.1.22


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