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Getting recommened_filename from MIME::Parser

by thatguy (Parson)
on Oct 16, 2001 at 10:52 UTC ( #119076=perlquestion: print w/ replies, xml ) Need Help??
thatguy has asked for the wisdom of the Perl Monks concerning the following question:

I've looked through the Super Search for examples of receiving attachments with MIME::Parser. I've been through the docs for Parser, MIME::Parser::Filer, and Parser::Head and for the life of me I cannot get the recomended filename for an attached file.

Anyone know what is causing the script to fail to find the suggested filename?

These are the errors I get with the various methods:
Method 1:
Can't call method "path" on an undefined value at ./mail_prog.pl line 59.
Method 2 & 3:
Use of uninitialized value in concatenation (.) or string at ./mail_prog.pl line 67

I have the three methods I've seen and tried below.

much thanks in advance.
-phill

#!/usr/bin/perl -w use Mail::POP3Client; use MIME::Parser; use MIME::Head; use strict; my $pop=new Mail::POP3Client( USER=>"xxxx", PASSWORD=>"xxxx", HOST=>"mail.example.com"); my $msgcount=$pop->Count(); my $msgnum; for $msgnum (1 .. $msgcount){ print "message number: $msgnum\n"; # get headers my $header=$pop->Head($msgnum); # get body my $body=$pop->Body($msgnum); # get whole message my $message=$pop->HeadAndBody($msgnum); my $parser=new MIME::Parser; # disable output to file/dir $parser->output_to_core(1); my $entity = $parser->parse_data($message); # get the number of parts of the message (if multipart) my $num_parts = $entity->parts; my @parts = $entity->parts; my $bodydata; if ($num_parts > 0) { # more than one part, mime-ahoy? my $part; for $part(@parts){ # get mime type my $type=$part->mime_type; my $bhandle=$part->bodyhandle; # special treatment for text and html if (($type =~ /text/i) || ($type=~ /html/i)){ if (my $io = $part->open("r")) { while (defined($_ = $io->getline)) { $bodydata .= $_; } $io->close; } print $bodydata,"\n"; } else { # must be an attachment of sorts or # at least not text/html my $content .= $bhandle->as_string if defined $bhandle; # method 1 # my $file_name = $entity->head->recommended_filename || # $entity->bodyhandle->path; # method 2 #my $mimehead=MIME::Head->new; #my $file_name=$mimehead->recommended_filename; # method 3 #my $file_name = $bhandle->{MB_Path}; print "path: $file_name\n"; # dump attachment to outfile # (works when name is specified) open(OUT,"> /path/to/attachments/$file_name"); # is this needed? local $/ = undef; print OUT $content,"\n"; close(OUT); } } } else { # plaintext or html! if (my $io = $entity->open("r")) { while (defined($_ = $io->getline)) { $bodydata .= $_; } $io->close; } print $bodydata,"\n"; } $entity->purge; } exit;

Comment on Getting recommened_filename from MIME::Parser
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Re: Getting recommened_filename from MIME::Parser
by projekt21 (Friar) on Oct 16, 2001 at 13:01 UTC

    I'm not sure if I can help you solve your problem ...

    Update (further research): I noticed three things:

    • As long as I use $parser->output_to_core(1); I don't get the path. Changing to $parser->output_under("/tmp"); does return a path.
    • Your for $part(@parts){ }-loop runs one iteration too often, so your error message comes from the last call, where no parts are left.
    • method 1: change $entity->bodyhandle->path; to $part->bodyhandle->path;.

    The following code works fine for me:

    use MIME::Parser; split_entity($entity); # $entity is a MIME::Entity object ################################################ sub split_entity { ################################################ local $entity = shift; my $num_parts = $entity->parts; # how many mime parts? if ($num_parts) { # we have a multipart mime message foreach (1..$num_parts) { split_entity( $entity->parts($_ - 1) ); # recursive call } } else { # we have a single mime message/part if ($entity->effective_type =~ /^text\/plain$/) { # text message handle_text($entity->bodyhandle->as_string); } else { # no text message handle_other($entity->bodyhandle->path); } } }

    As you can see, I use path as you did and it is working perfectly.

    I further recommend using a similar recursive call as some mailers seem to nest multipart messages and you maybe want to parse them correctly to any depth.

    alex pleiner <alex@zeitform.de>
    zeitform Internet Dienste

      Excellent! that works perfectly, thanks!
      -phill

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