RFC2822::EmailAddress

Ruby
1

I am checking email addresses using RFC2822::EmailAddress

address =~ RFC2822::EmailAddress

seems to work fine, but I wonder why an email address like :
me@somewhere is accepeted… there is no domain

is it right ?

tfyl

joss

2

On Wed, 17 Jan 2007, Josselin wrote:

I am checking email addresses using RFC2822::EmailAddress

address =~ RFC2822::EmailAddress

seems to work fine, but I wonder why an email address like : me@somewhere is
accepeted… there is no domain

is it right ?

it could still be ‘me@somehost’ - and as long as your mail service can
resolve that address, it’s perfectly fine… When you perform the regexp
check therefore, this address is fine - the regexp check can’t see
whether
the user, host, or domain are valid - but the format is OK.

Benedikt

ALLIANCE, n. In international politics, the union of two thieves who
have their hands so deeply inserted in each other’s pockets that
they cannot separately plunder a third.
(Ambrose Bierce, The Devil’s Dictionary)

3

…excuse me…but…how do i load this module or is it a constant???
dave

Josselin wrote:

On 2007-01-17 12:50:22 +0100, Benedikt H. [email protected]
said:

ALLIANCE, n. In international politics, the union of two thieves who
have their hands so deeply inserted in each other’s pockets that
they cannot separately plunder a third.
(Ambrose Bierce, The Devil’s Dictionary)

thanks a lot

4

On 2007-01-17 12:50:22 +0100, Benedikt H. [email protected]
said:

ALLIANCE, n. In international politics, the union of two thieves who
have their hands so deeply inserted in each other’s pockets that
they cannot separately plunder a third.
(Ambrose Bierce, The Devil’s Dictionary)

thanks a lot

5

On Wed, 17 Jan 2007 22:56:26 +0900
Dave R. [email protected] wrote:

…excuse me…but…how do i load this module or is it a constant???
dave

–
module RFC822
EmailAddress = begin
qtext = ‘[^\x0d\x22\x5c\x80-\xff]’
dtext = ‘[^\x0d\x5b-\x5d\x80-\xff]’
atom = ‘[^\x00-\x20\x22\x28\x29\x2c\x2e\x3a-’ +
‘\x3c\x3e\x40\x5b-\x5d\x7f-\xff]+’
quoted_pair = ‘\x5c[\x00-\x7f]’
domain_literal = “\x5b(?:#{dtext}|#{quoted_pair})\x5d"
quoted_string = "\x22(?:#{qtext}|#{quoted_pair})\x22”
domain_ref = atom
sub_domain = “(?:#{domain_ref}|#{domain_literal})”
word = “(?:#{atom}|#{quoted_string})”
domain = “#{sub_domain}(?:\x2e#{sub_domain})"
local_part = "#{word}(?:\x2e#{word})”
addr_spec = “#{local_part}\x40#{domain}”
pattern = /\A#{addr_spec}\z/
end
end

In your program. On in a file of its own and require ‘rfc822.rb’

Dom