Provided by: libemail-address-xs-perl_1.01-1_amd64 
NAME
Email::Address::XS - Parse and format RFC 2822 email addresses and groups
SYNOPSIS
use Email::Address::XS;
my $winstons_address = Email::Address::XS->new(phrase => 'Winston Smith', user => 'winston.smith', host => 'recdep.minitrue', comment => 'Records Department');
print $winstons_address->address();
# winston.smith@recdep.minitrue
my $julias_address = Email::Address::XS->new('Julia', 'julia@ficdep.minitrue');
print $julias_address->format();
# Julia <julia@ficdep.minitrue>
my $users_address = Email::Address::XS->parse('user <user@oceania>');
print $users_address->host();
# oceania
my $goldsteins_address = Email::Address::XS->parse_bare_address('goldstein@brotherhood.oceania');
print $goldsteins_address->user();
# goldstein
my @addresses = Email::Address::XS->parse('"Winston Smith" <winston.smith@recdep.minitrue> (Records Department), Julia <julia@ficdep.minitrue>');
# ($winstons_address, $julias_address)
use Email::Address::XS qw(format_email_addresses format_email_groups parse_email_addresses parse_email_groups);
my $addresses_string = format_email_addresses($winstons_address, $julias_address, $users_address);
# "Winston Smith" <winston.smith@recdep.minitrue> (Records Department), Julia <julia@ficdep.minitrue>, user <user@oceania>
my @addresses = map { $_->address() } parse_email_addresses($addresses_string);
# ('winston.smith@recdep.minitrue', 'julia@ficdep.minitrue', 'user@oceania')
my $groups_string = format_email_groups('Brotherhood' => [ $winstons_address, $julias_address ], undef() => [ $users_address ]);
# Brotherhood: "Winston Smith" <winston.smith@recdep.minitrue> (Records Department), Julia <julia@ficdep.minitrue>;, user <user@oceania>
my @groups = parse_email_groups($groups_string);
# ('Brotherhood' => [ $winstons_address, $julias_address ], undef() => [ $users_address ])
use Email::Address::XS qw(compose_address split_address);
my ($user, $host) = split_address('julia(outer party)@ficdep.minitrue');
# ('julia', 'ficdep.minitrue')
my $string = compose_address('charrington"@"shop', 'thought.police.oceania');
# "charrington\"@\"shop"@thought.police.oceania
DESCRIPTION
This module implements RFC 2822 <https://tools.ietf.org/html/rfc2822> parser and formatter
of email addresses and groups. It parses an input string from email headers which contain
a list of email addresses or a groups of email addresses (like From, To, Cc, Bcc, Reply-
To, Sender, ...). Also it can generate a string value for those headers from a list of
email addresses objects.
Parser and formatter functionality is implemented in XS and uses shared code from Dovecot
IMAP server.
It is a drop-in replacement for the Email::Address module which has several security
issues. E.g. issue CVE-2015-7686 (Algorithmic complexity vulnerability)
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7686>, which allows remote
attackers to cause denial of service, is still present in Email::Address version 1.908.
Email::Address::XS module was created to finally fix CVE-2015-7686.
Existing applications that use Email::Address module could be easily switched to
Email::Address::XS module. In most cases only changing "use Email::Address" to "use
Email::Address::XS" and replacing every "Email::Address" occurrence with
"Email::Address::XS" is sufficient.
So unlike Email::Address, this module does not use regular expressions for parsing but
instead native XS implementation parses input string sequentially according to RFC 2822
grammar.
Additionally it has support also for named groups and so can be use instead of the
Email::Address::List module.
If you are looking for the module which provides object representation for the list of
email addresses suitable for the MIME email headers, see Email::MIME::Header::AddressList.
EXPORT
None by default. Exportable functions are: "parse_email_addresses", "parse_email_groups",
"format_email_addresses", "format_email_groups", "compose_address", "split_address".
Exportable Functions
format_email_addresses
use Email::Address::XS qw(format_email_addresses);
my $winstons_address = Email::Address::XS->new(phrase => 'Winston Smith', address => 'winston@recdep.minitrue');
my $julias_address = Email::Address::XS->new(phrase => 'Julia', address => 'julia@ficdep.minitrue');
my @addresses = ($winstons_address, $julias_address);
my $string = format_email_addresses(@addresses);
print $string;
# "Winston Smith" <winston@recdep.minitrue>, Julia <julia@ficdep.minitrue>
Takes a list of email address objects and returns one formatted string of those email
addresses.
format_email_groups
use Email::Address::XS qw(format_email_groups);
my $undef = undef;
my $winstons_address = Email::Address::XS->new(phrase => 'Winston Smith', user => 'winston.smith', host => 'recdep.minitrue');
my $julias_address = Email::Address::XS->new('Julia', 'julia@ficdep.minitrue');
my $users_address = Email::Address::XS->new(address => 'user@oceania');
my $groups_string = format_email_groups('Brotherhood' => [ $winstons_address, $julias_address ], $undef => [ $users_address ]);
print $groups_string;
# Brotherhood: "Winston Smith" <winston.smith@recdep.minitrue>, Julia <julia@ficdep.minitrue>;, user@oceania
my $undisclosed_string = format_email_groups('undisclosed-recipients' => []);
print $undisclosed_string;
# undisclosed-recipients:;
Like "format_email_addresses" but this method takes pairs which consist of a group
display name and a reference to address list. If a group is not undef then address
list is formatted inside named group.
parse_email_addresses
use Email::Address::XS qw(parse_email_addresses);
my $string = '"Winston Smith" <winston.smith@recdep.minitrue>, Julia <julia@ficdep.minitrue>, user@oceania';
my @addresses = parse_email_addresses($string);
# @addresses now contains three Email::Address::XS objects, one for each address
Parses an input string and returns a list of Email::Address::XS objects. Optional
second string argument specifies class name for blessing new objects.
parse_email_groups
use Email::Address::XS qw(parse_email_groups);
my $undef = undef;
my $string = 'Brotherhood: "Winston Smith" <winston.smith@recdep.minitrue>, Julia <julia@ficdep.minitrue>;, user@oceania, undisclosed-recipients:;';
my @groups = parse_email_groups($string);
# @groups now contains list ('Brotherhood' => [ $winstons_object, $julias_object ], $undef => [ $users_object ], 'undisclosed-recipients' => [])
Like "parse_email_addresses" but this function returns a list of pairs: a group
display name and a reference to a list of addresses which belongs to that named group.
An undef value for a group means that a following list of addresses is not inside any
named group. An output is in a same format as a input for the function
"format_email_groups". This function preserves order of groups and does not do any
de-duplication or merging.
compose_address
use Email::Address::XS qw(compose_address);
my $string_address = compose_address($user, $host);
Takes an unescaped user part and unescaped host part of an address and returns escaped
address.
Available since version 1.01.
split_address
use Email::Address::XS qw(split_address);
my ($user, $host) = split_address($string_address);
Takes an escaped address and split it into pair of unescaped user part and unescaped
host part of address. If splitting input address into these two parts is not possible
then this function returns pair of undefs.
Available since version 1.01.
Class Methods
new
my $empty_address = Email::Address::XS->new();
my $winstons_address = Email::Address::XS->new(phrase => 'Winston Smith', user => 'winston.smith', host => 'recdep.minitrue', comment => 'Records Department');
my $julias_address = Email::Address::XS->new('Julia', 'julia@ficdep.minitrue');
my $users_address = Email::Address::XS->new(address => 'user@oceania');
my $only_name = Email::Address::XS->new(phrase => 'Name');
my $copy_of_winstons_address = Email::Address::XS->new(copy => $winstons_address);
Constructs and returns a new "Email::Address::XS" object. Takes named list of
arguments: phrase, address, user, host, comment and copy. An argument address takes
precedence over user and host.
When an argument copy is specified then it is expected an Email::Address::XS object
and a cloned copy of that object is returned. All other parameters are ignored.
Old syntax from the Email::Address module is supported too. Takes one to four
positional arguments: phrase, address comment, and original string. Passing an
argument original is deprecated, ignored and throws a warning.
parse
my $winstons_address = Email::Address::XS->parse('"Winston Smith" <winston.smith@recdep.minitrue> (Records Department)');
my @users_addresses = Email::Address::XS->parse('user1@oceania, user2@oceania');
Parses an input string and returns a list of an Email::Address::XS objects. Same as
the function "parse_email_addresses" but this one is class method.
In scalar context this function returns just first parsed object. If more then one
object was parsed then "is_valid" method on returned object returns false. If no
object was parsed then empty Email::Address::XS object is returned.
Prior to version 1.01 return value in scalar context is undef when no object was
parsed.
parse_bare_address
my $winstons_address = Email::Address::XS->parse_bare_address('winston.smith@recdep.minitrue');
Parses an input string as one bare email address (addr spec) which does not allow
phrase part or angle brackets around email address and returns an Email::Address::XS
object. It is just a wrapper around "address" method. Method "is_valid" can be used to
check if parsing was successful.
Available since version 1.01.
Object Methods
format
my $string = $address->format();
Returns formatted Email::Address::XS object as a string.
is_valid
my $is_valid = $address->is_valid();
Returns true if the parse function or method which created this Email::Address::XS
object had not received any syntax error on input string and also that "user" and
"host" part of the email address are not empty strings.
Thus this function can be used for checking if Email::Address::XS object is valid
before calling "format" method on it.
Available since version 1.01.
phrase
my $phrase = $address->phrase();
$address->phrase('Winston Smith');
Accessor and mutator for the phrase (display name).
user
my $user = $address->user();
$address->user('winston.smith');
Accessor and mutator for the unescaped user (local/mailbox) part of an address.
host
my $host = $address->host();
$address->host('recdep.minitrue');
Accessor and mutator for the unescaped host (domain) part of an address.
address
my $string_address = $address->address();
$address->address('winston.smith@recdep.minitrue');
Accessor and mutator for the escaped address (addr spec).
Internally this module stores a user and a host part of an address separately.
Function "compose_address" is used for composing full address and function
"split_address" for splitting into a user and a host parts. If splitting new address
into these two parts is not possible then this method returns undef and sets both
parts to undef.
comment
my $comment = $address->comment();
$address->comment('Records Department');
Accessor and mutator for the comment which is formatted after an address. A comment
can contain another nested comments in round brackets. When setting new comment this
method check if brackets are balanced. If not undef is set and returned.
name
my $name = $address->name();
This method tries to return a name which belongs to the address. It returns either
"phrase" or "comment" or "user" part of the address or empty string (first defined
value in this order). But it never returns undef.
original
my $address = Email::Address::XS->parse('(Winston) "Smith" <winston.smith@recdep.minitrue> (Minitrue)');
my $original = $address->original();
# (Winston) "Smith" <winston.smith@recdep.minitrue> (Minitrue)
my $format = $address->format();
# Smith <winston.smith@recdep.minitrue> (Minitrue)
This method returns original part of the string which was used for parsing current
Email::Address::XS object. If object was not created by parsing input string, then
this method returns undef.
Note that "format" method does not have to return same original string.
Available since version 1.01.
Overloaded Operators
stringify
my $address = Email::Address::XS->new(phrase => 'Winston Smith', address => 'winston.smith@recdep.minitrue');
print "Winston's address is $address.";
# Winston's address is "Winston Smith" <winston.smith@recdep.minitrue>.
Objects stringify to "format". For stringification purpose is defined method
"as_string".
Deprecated Functions and Variables
For compatibility with the Email::Address module there are defined some deprecated
functions and variables. Do not use them in new code. Their usage throws warnings.
Altering deprecated variable $Email::Address::XS::STRINGIFY changes method which is called
for objects stringification.
Deprecated cache functions "purge_cache", "disable_cache" and "enable_cache" are noop and
do nothing.
SEE ALSO
RFC 822 <https://tools.ietf.org/html/rfc822>, RFC 2822
<https://tools.ietf.org/html/rfc2822>, Email::MIME::Header::AddressList, Email::Address,
Email::Address::List, Email::AddressParser
AUTHOR
Pali <pali@cpan.org>
COPYRIGHT AND LICENSE
Copyright (C) 2015-2017 by Pali <pali@cpan.org>
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself, either Perl version 5.6.0 or, at your option, any later version of
Perl 5 you may have available.
Dovecot parser is licensed under The MIT License and copyrighted by Dovecot authors.