[BACK]Return to LONCAPA.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom

Diff for /loncom/LONCAPA.pm between versions 1.11 and 1.30

version 1.11, 2006/06/27 21:47:15 version 1.30, 2010/06/15 05:31:43
Line 27 Line 27
 #  #
 ###  ###
   
   
   
 package LONCAPA;  package LONCAPA;
   
 use strict;  use strict;
Line 38  use POSIX; Line 40  use POSIX;
   
 my $loncapa_max_wait_time = 13;  my $loncapa_max_wait_time = 13;
   
   
   use vars qw($match_domain   $match_not_domain
       $match_username $match_not_username
       $match_courseid $match_not_courseid
               $match_community
       $match_name
               $match_lonid
       $match_handle   $match_not_handle);
   
 require Exporter;  require Exporter;
 our @ISA = qw (Exporter);  our @ISA = qw (Exporter);
 our @EXPORT = qw(&escape_LaTeX &add_get_param &escape &unescape &tie_domain_hash &untie_domain_hash &tie_user_hash &untie_user_hash &propath);  our @EXPORT = qw(&add_get_param    &escape            &unescape       
    &tie_domain_hash  &untie_domain_hash &tie_user_hash
    &untie_user_hash  &propath);
   our @EXPORT_OK = qw($match_domain   $match_not_domain
       $match_username $match_not_username
       $match_courseid $match_not_courseid
                       $match_community
       $match_name
       $match_lonid
       $match_handle   $match_not_handle);
   our %EXPORT_TAGS = ( 'match' =>[qw($match_domain   $match_not_domain
      $match_username $match_not_username
      $match_courseid $match_not_courseid
                                      $match_community
      $match_name
      $match_lonid
      $match_handle   $match_not_handle)],);
 my %perlvar;  my %perlvar;
   
 # Escape a LaTeX string of special characters that according to LaTeX line by line  
 # pg 9 are: # $ % & \ ^ _ { } ~  These are escaped by prepending a \  
 #  
 sub escape_LaTeX {  
     my ($string) = @_;  
     $string =~ s/[\#\$\%\&\\^_{}]/\\$&/g;  
     return $string;  
 }  
   
   
 # Inputs are a url, and a hash ref of  
 # form name => value pairs  
 # takes care of properly adding the form name elements and values to the   
 # the url doing proper escaping of the values and joining with ? or & as   
 # needed  
   
 sub add_get_param {  sub add_get_param {
     my ($url,$form_data) = @_;      my ($url,$form_data) = @_;
Line 91  sub unescape { Line 103  sub unescape {
     return $str;      return $str;
 }  }
   
   $match_domain     = $LONCAPA::domain_re     = qr{[[:alnum:]\-.]+};
   $match_not_domain = $LONCAPA::not_domain_re = qr{[^[:alnum:]\-.]+};
   sub clean_domain {
       my ($domain) = @_;
       $domain =~ s/$match_not_domain//g;
       return $domain;
   }
   
   $match_username     = $LONCAPA::username_re     = qr{\w[\w\-.@]+};
   $match_not_username = $LONCAPA::not_username_re = qr{[^\w\-.@]+};
   sub clean_username {
       my ($username) = @_;
       $username =~ s/^\W+//;
       $username =~ s/$match_not_username//g;
       return $username;
   }
   
   
   $match_courseid     = $LONCAPA::courseid_re     = qr{\d[\w\-.]+};
   $match_community    =$LONCAPA::community_re     = qr{0[\w\-.]+};
   $match_not_courseid = $LONCAPA::not_courseid_re = qr{[^\w\-.]+};
   sub clean_courseid {
       my ($courseid) = @_;
       $courseid =~ s/^\D+//;
       $courseid =~ s/$match_not_courseid//g;
       return $courseid;
   }
   
   $match_name         = $LONCAPA::name_re = qr{$match_username|$match_courseid};
   sub clean_name {
       my ($name) = @_;
       $name =~ s/$match_not_username//g;
       return $name;
   }
   
   $match_lonid     = $LONCAPA::lonid_re     = qr{[\w\-.]+};
   
   sub split_courseid {
       my ($courseid) = @_;
       my  ($domain,$coursenum) = 
    ($courseid=~m{^/($match_domain)/($match_courseid)});
       return ($domain,$coursenum);
   }
   
   $match_handle     = $LONCAPA::handle_re     = qr{[\w\-.@]+};
   $match_not_handle = $LONCAPA::not_handle_re = qr{[^\w\-.@]+};
   sub clean_handle {
       my ($handle) = @_;
       $handle =~ s/$match_not_handle//g;
       return $handle;
   }
   
 # -------------------------------------------- Return path to profile directory  # -------------------------------------------- Return path to profile directory
   
 sub propath {  sub propath {
     my ($udom,$uname)=@_;      my ($udom,$uname)=@_;
     $udom=~s/\W//g;      $udom = &clean_domain($udom);
     $uname=~s/\W//g;      $uname= &clean_name($uname);
     my $subdir=$uname.'__';      my $subdir=$uname.'__';
     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;      $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";      my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
     return $proname;      return $proname;
 }   }
   
   
 #---------------------------------------------------------------  
 #  
 # Manipulation of hash based databases (factoring out common code  
 # for later use as we refactor.  
 #  
 #  Ties a domain level resource file to a hash.  
 #  If requested a history entry is created in the associated hist file.  
 #  
 #  Parameters:  
 #     domain    - Name of the domain in which the resource file lives.  
 #     namespace - Name of the hash within that domain.  
 #     how       - How to tie the hash (e.g. GDBM_WRCREAT()).  
 #     loghead   - Optional parameter, if present a log entry is created  
 #                 in the associated history file and this is the first part  
 #                  of that entry.  
 #     logtail   - Goes along with loghead,  The actual logentry is of the  
 #                 form $loghead:<timestamp>:logtail.  
 # Returns:  
 #    Reference to a hash bound to the db file or alternatively undef  
 #    if the tie failed.  
 #  
 sub tie_domain_hash {  sub tie_domain_hash {
     my ($domain,$namespace,$how,$loghead,$logtail) = @_;      my ($domain,$namespace,$how,$loghead,$logtail) = @_;
           
     # Filter out any whitespace in the domain name:      # Filter out any whitespace in the domain name:
           
     $domain =~ s/\W//g;      $domain = &clean_domain($domain);
           
     # We have enough to go on to tie the hash:      # We have enough to go on to tie the hash:
           
Line 143  sub tie_domain_hash { Line 185  sub tie_domain_hash {
 sub untie_domain_hash {  sub untie_domain_hash {
     return &_locking_hash_untie(@_);      return &_locking_hash_untie(@_);
 }  }
 #  
 #   Ties a user's resource file to a hash.    
 #   If necessary, an appropriate history  
 #   log file entry is made as well.  
 #   This sub factors out common code from the subs that manipulate  
 #   the various gdbm files that keep keyword value pairs.  
 # Parameters:  
 #   domain       - Name of the domain the user is in.  
 #   user         - Name of the 'current user'.  
 #   namespace    - Namespace representing the file to tie.  
 #   how          - What the tie is done to (e.g. GDBM_WRCREAT().  
 #   loghead      - Optional first part of log entry if there may be a  
 #                  history file.  
 #   what         - Optional tail of log entry if there may be a history  
 #                  file.  
 # Returns:  
 #   hash to which the database is tied.  It's up to the caller to untie.  
 #   undef if the has could not be tied.  
 #  
 sub tie_user_hash {  sub tie_user_hash {
     my ($domain,$user,$namespace,$how,$loghead,$what) = @_;      my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
   
     $namespace=~s/\//\_/g; # / -> _      $namespace=~s{/}{_}g; # / -> _
     $namespace=~s/\W//g; # whitespace eliminated.      $namespace     = &clean_username($namespace);
     my $proname     = &propath($domain, $user);      my $proname    = &propath($domain, $user);
   
     my $file_prefix="$proname/$namespace";      my $file_prefix="$proname/$namespace";
     return &_locking_hash_tie($file_prefix,$namespace,$how,$loghead,$what);      return &_locking_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
 }  }
Line 177  sub untie_user_hash { Line 201  sub untie_user_hash {
     return &_locking_hash_untie(@_);      return &_locking_hash_untie(@_);
 }  }
   
 # routines if you just have a filename  
 # return tied hashref or undef  
   
 sub locking_hash_tie {  sub locking_hash_tie {
     my ($filename,$how)=@_;      my ($filename,$how)=@_;
Line 305  sub _do_hash_untie { Line 327  sub _do_hash_untie {
 # Change access mode to non-blocking  # Change access mode to non-blocking
        $how=$how|&GDBM_NOLOCK();         $how=$how|&GDBM_NOLOCK();
 # Go ahead and tie the hash  # Go ahead and tie the hash
        return &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);        my $result = 
       &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
    if (!$result) {
       &clean_sym();
    }
    return $result;
     }      }
   
     sub flock_sym {      sub flock_sym {
Line 351  __END__ Line 378  __END__
   
 =head1 NAME  =head1 NAME
   
   Apache::LONCAPA
   
 LONCAPA - Basic routines  LONCAPA - Basic routines
   
 =head1 SYNOPSIS  =head1 SYNOPSIS
Line 359  Generally useful routines Line 388  Generally useful routines
   
 =head1 EXPORTED SUBROUTINES  =head1 EXPORTED SUBROUTINES
   
 =over 4  =over
   
 =item *  =item escape()
   
 escape() : unpack non-word characters into CGI-compatible hex codes  unpack non-word characters into CGI-compatible hex codes
   
 =item *  =item unescape()
   
 unescape() : pack CGI-compatible hex codes into actual non-word ASCII character   pack CGI-compatible hex codes into actual non-word ASCII character
   
 =item *  =item  add_get_param()
   
 add_get_param() :  Append escaped form elements (name=value etc.) to a url.
    
  Inputs:  url (with or without exit GET from parameters), hash ref of   Inputs:  url (with or without exit GET from parameters), hash ref of
               form name => value pairs                form name => value pairs
   
  Return: url with properly added the form name elements and values to the    Return: url with form name elements and values appended to the 
          the url doing proper escaping of the values and joining with ? or &           the url, doing proper escaping of the values and joining with ? or &
          as needed           as needed
   
   =item clean_handle()
   
   =item propath()
   
   =item untie_domain_hash()
   
   =item tie_domain_hash()
   
   Manipulation of hash based databases (factoring out common code
   for later use as we refactor.
   
    Ties a domain level resource file to a hash.
    If requested a history entry is created in the associated hist file.
   
    Parameters:
       domain    - Name of the domain in which the resource file lives.
       namespace - Name of the hash within that domain.
       how       - How to tie the hash (e.g. GDBM_WRCREAT()).
       loghead   - Optional parameter, if present a log entry is created
                   in the associated history file and this is the first part
                    of that entry.
       logtail   - Goes along with loghead,  The actual logentry is of the
                   form $loghead:<timestamp>:logtail.
   Returns:
      Reference to a hash bound to the db file or alternatively undef
      if the tie failed.
   
   =item tie_user_hash()
   
     Ties a user's resource file to a hash.  
     If necessary, an appropriate history
     log file entry is made as well.
     This sub factors out common code from the subs that manipulate
     the various gdbm files that keep keyword value pairs.
   Parameters:
     domain       - Name of the domain the user is in.
     user         - Name of the 'current user'.
     namespace    - Namespace representing the file to tie.
     how          - What the tie is done to (e.g. GDBM_WRCREAT().
     loghead      - Optional first part of log entry if there may be a
                    history file.
     what         - Optional tail of log entry if there may be a history
                    file.
   Returns:
     hash to which the database is tied.  It's up to the caller to untie.
     undef if the has could not be tied.
   
   =item locking_hash_tie()
   
   routines if you just have a filename return tied hashref or undef
   
   =item locking_hash_untie()
   
   =item db_filename_parts()
   
   =head1 INTERNAL SUBROUTINES
   
   =item _do_hash_tie()
   
   =item _do_hash_untie()
   
 =back  =back
   
   =cut
   
Removed from v.1.11  
changed lines
  Added in v.1.30

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>