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Validate newline delimited email list

by philosophia (Sexton)
on Jan 12, 2007 at 20:44 UTC ( #594446=perlquestion: print w/replies, xml ) Need Help??

philosophia has asked for the wisdom of the Perl Monks concerning the following question:

This code is supposed to split up a newline delimited list of email addresses, and iterate through each line, using Email::Valid to test each address. It is not working correctly - it seems to be flagging every address as being invalid, even correct addresses.

my ($error) = 0; my (@other_addresses) = split( /\n/, $email_list ); foreach (@other_addresses) { chomp($_); print $_; $error++ unless(Email::Valid->address($_)); } $error_message .= "$error Email list contains an invalid email add +ress.<br>" unless( $error < 1 );

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Re: Validate newline delimited email list
by japhy (Canon) on Jan 12, 2007 at 21:08 UTC
    First of all, use split /\n/. Don't put a literal newline in your code -- that's ugly. Second, the chomping is entirely unnecessary if you're splitting the string on newlines. Third, are you entirely sure the email addresses contain validly formatted addresses and nothing else? I'd suggest doing:
    foreach (@other_addresses) { my $ok = Email::Valid->address($_); print "address($_) = $ok\n"; }

    Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
    How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart
Re: Validate newline delimited email list
by ikegami (Patriarch) on Jan 12, 2007 at 21:14 UTC

    Works for me except I had to initialize $email_list, initialize $error_message and print $error_message. Could you provide a snippet that actually shows the error?

    There are a couple of details worth mentioning.

      the current version of this code looks like

      my ($error) = 0; my (@other_addresses) = split( /\n/, $email_list ); foreach (@other_addresses) { my $ok = Email::Valid->address($_); $error++ if(!$ok); print "address($_) = $ok\n"; print "error ".$error."<br>"; } $error_message .= "$error Email list contains an invalid email ad +dress.<br>" if $error;
      and gives me

      address( ) = error 1 address( = error 1 There was an error with your form submission. 1 Email list contains an invalid email address.

      it seems to let every address through whether it is valid or not.

        " " is indeed bad. Notice the trailing space? It's easy to fix the address, though.

        sub trim { my ($s) = @_; for ($s) { s/^\s+//; s/\s+$//; return $_; } } ... my @other_addresses = map trim, split( /\n/, $email_list ); ...

        Looks to me that this line

        $error++ if(!$ok);

        is merely testing whether $ok exists, which it always does according to the line above it.

        my $ok = Email::Valid->address($_);

        Try testing for the value of $ok that was returned instead.

        if ($ok == 1) {#the rest of your code } else {# code here too if you like }
Re: Validate newline delimited email list
by ikegami (Patriarch) on Jan 12, 2007 at 20:48 UTC
    Something's wrong with what you posted. Some lines are missing (where is $error set?) and the print line is cut halfway through.
      $error is set in the first line of code. I've revised the print line. Thanks for taking a look...

        $error is set in the first line of code.

        You know I meant where it set after being initialized because you added

        $error++ unless(Email::Valid->address($_));
Re: Validate newline delimited email list
by MonkE (Hermit) on Jan 12, 2007 at 21:53 UTC
    Are you using Perl or newer? Because it's a preqrequisite mentioned on CPAN.

    What happens if you evaluate Email::Valid->address('') or some other string constant, email address that you know to be valid? I ask because perhaps you are having character encoding issues on your form submission.

      perl 5.8.5.

      '' evaluates correctly, as in Email::Valid->address('') returns the email address. An invalid email address returns nothing.
Re: Validate newline delimited email list
by phaylon (Curate) on Jan 16, 2007 at 12:54 UTC
    Just as a quick note, I would do:
    my @addrs = split /\n/, $email_list; my @addrs_invalid = grep { not Email::Valid->address($_) } @addrs; print 'The following Email addresses are invalid:<ul>' . (map { '<li>' . $_ . '</li>' } @addrs_invalid) . '</ul>';
    Untested and only proof of concept (no encoding and stuff), of course ;)

    Ordinary morality is for ordinary people. -- Aleister Crowley

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