File(3)

NAME
Digest::MD5::File - Perl extension for getting MD5 sums for files and urls.

SYNOPSIS
    use Digest::MD5::File qw(dir_md5_hex file_md5_hex url_md5_hex);

    my $md5 = Digest::MD5->new;
    $md5->addpath('/path/to/file');
    my $digest = $md5->hexdigest;

    my $digest = file_md5($file);
    my $digest = file_md5_hex($file);
    my $digest = file_md5_base64($file);

    my $md5 = Digest::MD5->new;
    $md5->addurl('http://www.tmbg.com/tour.html');
    my $digest = $md5->hexdigest;

    my $digest = url_md5($url);
    my $digest = url_md5_hex($url);
    my $digest = url_md5_base64($url);

    my $md5 = Digest::MD5->new;
    $md5->adddir('/directory');
    my $digest = $md5->hexdigest;

    my $dir_hashref = dir_md5($dir);
    my $dir_hashref = dir_md5_hex($dir);
    my $dir_hashref = dir_md5_base64($dir);

DESCRIPTION
  Get MD5 sums for files of a given path or content of a given url.

EXPORT
None by default. You can export any file_* dir_*, or url_* function and anything Digest::MD5 can export.

   use Digest::MD5::File qw(md5 md5_hex md5_base64); # 3 Digest::MD5 functions
   print md5_hex('abc123'), "\n";
   print md5_base64('abc123'), "\n";

OBJECT METHODS

  addpath()
    my $md5 = Digest::MD5->new;
    $md5->addpath('/path/to/file.txt')
        or die "file.txt is not where you said: $!";

or you can add multiple files by specifying an array ref of files:

    $md5->addpath(\@files);

  adddir()
addpath()s each file in a directory recursively. Follows the same rules as the dir_* functions.

    my $md5 = Digest::MD5->new;
    $md5->adddir('/home/tmbg/')
        or die "See warning above to see why I bailed: $!";

  addurl()
    my $md5 = Digest::MD5->new;
    $md5->addurl('http://www.tmbg.com/tour.html')
        or die "They Must Be not on tour";

file_* functions
Get the digest in variouse formats of $file. If file does not exist or is a directory it croaks (See NOFATALS for more info)

    my $digest = file_md5($file) or warn "$file failed: $!";
    my $digest = file_md5_hex($file) or warn "$file failed: $!";
    my $digest = file_md5_base64($file) or warn "$file failed: $!";

dir_* functions
Returns a hashref whose keys are files relative to the given path and the values are the MD5 sum of the file or and empty string if a directory. It recurses through the entire depth of the directory. Symlinks to files are just addpath()d and symlinks to directories are followed.

    my $dir_hashref = dir_md5($dir) or warn "$dir failed: $!";
    my $dir_hashref = dir_md5_hex($dir) or warn "$dir failed: $!";
    my $dir_hashref = dir_md5_base64($dir) or warn "$dir failed: $!";

url_* functions
Get the digest in various formats of the content at $url (Including, if $url points to directory, the directory listing content). Returns undef if url fails (IE if LWP::UserAgent's $res->is_success is false)

    my $digest = url_md5($url) or warn "$url failed";
    my $digest = url_md5_hex($url) or warn "$url failed";
    my $digest = url_md5_base64($url) or warn "$url failed";

SPECIAL SETTINGS

  BINMODE
By default files are opened in binmode. If you do not want to do this you can unset it a variety of ways:

    use Digest::MD5::File qw(-nobin);

or

    $Digest::MD5::File::BINMODE = 0;

or at the function/method level by specifying its value as the second argument:

    $md5->addpath($file,0);

    my $digest = file_md5_hex($file,0);

  UTF8
In some cases you may want to have your data utf8 encoded, you can do this the following ways:

    use Digest::MD5::File qw(-utf8);

or

    $Digest::MD5::File::UTF8 = 1;

or at the function/method level by specifying its value as the third argument for files and second for urls:

    $md5->addpath($file,$binmode,1);

    my $digest = file_md5_hex($file,$binmode,1);

    $md5->addurl($url,1);

    url_md5_hex($url,1);

It use's Encode's encode_utf8() function to do the encoding. So if you do not have Encode (pre 5.7.3) this won't work :)

  NOFATALS
Instead of croaking it will return undef if you set NOFATALS to true.

You can do this two ways:

    $Digest::MD5::File::NOFATALS = 1;

or the -nofatals flag:

    use Digest::MD5::File qw(-nofatals);

    my $digest = file_md5_hex($file) or die "$file failed";

$! is not set so its not really helpful if you die().

SEE ALSO
Digest::MD5, Encode, LWP::UserAgent

AUTHOR
Daniel Muey, <http://drmuey.com/cpan_contact.pl>

COPYRIGHT AND LICENSE
Copyright 2005 by Daniel Muey

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.