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Util(3)                              User Contributed Perl Documentation                             Util(3)



NAME
       Apache::Util - Interface to Apache C util functions

SYNOPSIS
         use Apache::Util qw(:all);

DESCRIPTION
       This module provides a Perl interface to some of the C utility functions available in Perl.  The same
       functionality is avaliable in libwww-perl, but the C versions are faster:

           use Benchmark;
           timethese(1000, {
               C => sub { my $esc = Apache::Util::escape_html($html) },
               Perl => sub { my $esc = HTML::Entities::encode($html) },
           });

           Benchmark: timing 1000 iterations of C, Perl...
                   C:  0 secs ( 0.17 usr  0.00 sys =  0.17 cpu)
                Perl: 15 secs (15.06 usr  0.04 sys = 15.10 cpu)

           use Benchmark;
           timethese(10000, {
               C => sub { my $esc = Apache::Util::escape_uri($uri) },
               Perl => sub { my $esc = URI::Escape::uri_escape($uri) },
           });

           Benchmark: timing 10000 iterations of C, Perl...
                   C:  0 secs ( 0.55 usr  0.01 sys =  0.56 cpu)
                Perl:  2 secs ( 1.78 usr  0.01 sys =  1.79 cpu)

FUNCTIONS
       escape_html
           This routine replaces unsafe characters in $string with their entity representation.

            my $esc = Apache::Util::escape_html($html);

           This function will correctly escape US-ASCII output. If you are using a different character set
           such as UTF8, or need more control on the escaping process, use HTML::Entities.

       escape_uri
           This function replaces all unsafe characters in the $string with their escape sequence and
           returns the result.

            my $esc = Apache::Util::escape_uri($uri);

       unescape_uri
           This function decodes all %XX hex escape sequences in the given URI.

            my $unescaped = Apache::Util::unescape_uri($safe_uri);

       unescape_uri_info
           This function is similar to unescape_uri() but is specialized to remove escape sequences from the
           query string portion of the URI. The main difference is that it translates the ``+'' character
           into spaces  as well as recognizing and translating the hex escapes.

           Example:

            $string = $r->uri->query;
            my %data = map { Apache::Util::unescape_uri_info($_) }
                         split /[=&]/, $string, -1;

            This would correctly translate the query string
            ``name=Fred+Flintstone&town=Bedrock'' into the hash:

            name => 'Fred Flintstone',
            town => 'Bedrock'

       parsedate
           Parses an HTTP date in one of three standard forms:

            Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 822, updated by RFC 1123

            Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036

            Sun Nov  6 08:49:37 1994       ; ANSI C's asctime() format

           Example:

            my $secs = Apache::Util::parsedate($date_str);

       ht_time
           Format a time string.

           Examples:

            my $str = Apache::Util::ht_time(time);

            my $str = Apache::Util::ht_time(time, "%d %b %Y %T %Z");

            my $str = Apache::Util::ht_time(time, "%d %b %Y %T %Z", 0);

       size_string
           Converts the given file size into a formatted string. The size given in the string will be in
           units of bytes, kilobytes, or megabytes, depending on the size.

            my $size = Apache::Util::size_string -s $r->finfo;

       validate_password
           Validate a plaintext password against a smashed one.  Use either crypt() (if available),
           ap_MD5Encode() or ap_SHA1Encode depending upon the format of the smashed input password.

           Returns true if they match, false otherwise.

            if (Apache::Util::validate_password("slipknot", "aXYx4GnaCrDQc")) {
                print "password match\n";
            }
            else {
                print "password mismatch\n";
            }

AUTHOR
       Doug MacEachern

SEE ALSO
       perl(1).



perl v5.8.8                                      2003-10-08                                          Util(3)