Email::Find(3) User Contributed Perl Documentation Email::Find(3)NAMEEmail::Find - Find RFC 822 email addresses in plain text
SYNOPSIS
use Email::Find;
# new object oriented interface
my $finder = Email::Find->new(\&callback);
my $num_found - $finder->find(\$text);
# good old functional style
$num_found = find_emails($text, \&callback);
DESCRIPTIONEmail::Find is a module for finding a subset of RFC 822 email addresses
in arbitrary text (see "CAVEATS"). The addresses it finds are not
guaranteed to exist or even actually be email addresses at all (see
"CAVEATS"), but they will be valid RFC 822 syntax.
Email::Find will perform some heuristics to avoid some of the more
obvious red herrings and false addresses, but there's only so much
which can be done without a human.
METHODS
new
$finder = Email::Find->new(\&callback);
Constructs new Email::Find object. Specified callback will be
called with each email as they're found.
find
$num_emails_found = $finder->find(\$text);
Finds email addresses in the text and executes callback registered.
The callback is given two arguments. The first is a Mail::Address
object representing the address found. The second is the actual
original email as found in the text. Whatever the callback returns
will replace the original text.
FUNCTIONS
For backward compatibility, Email::Find exports one function,
find_emails(). It works very similar to URI::Find's find_uris().
EXAMPLES
use Email::Find;
# Simply print out all the addresses found leaving the text undisturbed.
my $finder = Email::Find->new(sub {
my($email, $orig_email) = @_;
print "Found ".$email->format."\n";
return $orig_email;
});
$finder->find(\$text);
# For each email found, ping its host to see if its alive.
require Net::Ping;
$ping = Net::Ping->new;
my %Pinged = ();
my $finder = Email::Find->new(sub {
my($email, $orig_email) = @_;
my $host = $email->host;
next if exists $Pinged{$host};
$Pinged{$host} = $ping->ping($host);
});
$finder->find(\$text);
while( my($host, $up) = each %Pinged ) {
print "$host is ". $up ? 'up' : 'down' ."\n";
}
# Count how many addresses are found.
my $finder = Email::Find->new(sub { $_[1] });
print "Found ", $finder->find(\$text), " addresses\n";
# Wrap each address in an HTML mailto link.
my $finder = Email::Find->new(
sub {
my($email, $orig_email) = @_;
my($address) = $email->format;
return qq|<a href="mailto:$address">$orig_email</a>|;
},
);
$finder->find(\$text);
SUBCLASSING
If you want to change the way this module works in finding email
address, you can do it by making your subclass of Email::Find, which
overrides "addr_regex" and "do_validate" method.
For example, the following class can additionally find email addresses
with dot before at mark. This is illegal in RFC822, see
Email::Valid::Loose for details.
package Email::Find::Loose;
use base qw(Email::Find);
use Email::Valid::Loose;
# should return regex, which Email::Find will use in finding
# strings which are "thought to be" email addresses
sub addr_regex {
return $Email::Valid::Loose::Addr_spec_re;
}
# should validate $addr is a valid email or not.
# if so, return the address as a string.
# else, return undef
sub do_validate {
my($self, $addr) = @_;
return Email::Valid::Loose->address($addr);
}
Let's see another example, which validates if the address is an
existent one or not, with Mail::CheckUser module.
package Email::Find::Existent;
use base qw(Email::Find);
use Mail::CheckUser qw(check_email);
sub do_validate {
my($self, $addr) = @_;
return check_email($addr) ? $addr : undef;
}
CAVEATS
Why a subset of RFC 822?
I say that this module finds a subset of RFC 822 because if I
attempted to look for all possible valid RFC 822 addresses I'd wind
up practically matching the entire block of text! The complete
specification is so wide open that its difficult to construct
soemthing that's not an RFC 822 address.
To keep myself sane, I look for the 'address spec' or 'global
address' part of an RFC 822 address. This is the part which most
people consider to be an email address (the 'foo@bar.com' part) and
it is also the part which contains the information necessary for
delivery.
Why are some of the matches not email addresses?
Alas, many things which aren't email addresses look like email
addresses and parse just fine as them. The biggest headache is
email and usenet and email message IDs. I do my best to avoid
them, but there's only so much cleverness you can pack into one
library.
AUTHORS
Copyright 2000, 2001 Michael G Schwern <schwern@pobox.com>. All rights
reserved.
Current maintainer is Tatsuhiko Miyagawa <miyagawa@bulknews.net>.
THANKS
Schwern thanks to Jeremy Howard for his patch to make it work under
5.005.
LICENSE
This module is free software; you may redistribute it and/or modify it
under the same terms as Perl itself.
The author STRONGLY SUGGESTS that this module not be used for the
purposes of sending unsolicited email (ie. spamming) in any way, shape
or form or for the purposes of generating lists for commercial sale.
If you use this module for spamming I reserve the right to make fun of
you.
SEE ALSO
Email::Valid, RFC 822, URI::Find, Apache::AntiSpam, Email::Valid::Loose
POD ERRORS
Hey! The above document had some coding errors, which are explained
below:
Around line 138:
You forgot a '=back' before '=head1'
perl v5.14.1 2007-01-16 Email::Find(3)
