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

I am working on a project where I need to be able to extract attachments from an email that have been added in Simplified Chinese. The problem is that when they are extract to the file system I end up with names like ????.doc!

I put together a little test script to show what I mean:

#!/usr/bin/perl

use MIME::Parser;
use MIME::Parser::Filer;

my $tempdir = "extract";
( -d $tempdir) or mkdir $tempdir, 0755 or die "mkdir: $!";

my $parser = new MIME:arser;

$parser->output_under("/home/uxbod/extract");
$parser->extract_uuencode(1);
$entity = $parser->parse_open("/home/uxbod/testmessage");

foreach my $part ($entity->parts_DFS) {

  next if (!$part->bodyhandle);

  my $rec_filename = $part->head->recommended_filename;
  my $filename = $part->bodyhandle->path;
  print "Recommended: $rec_filename Alternative : $filename\n";
}

$parser->filer->purge;
rmtree $tempdir;

[download]

and when this runs I see the following output:

[uxbod@gateway ~]# ./testextract.pl
ignoring text in character set `GB2312'
 at /usr/share/perl5/MIME/Parser/Filer.pm line 659
ignoring text in character set `GB2312'
 at /usr/share/perl5/MIME/Parser/Filer.pm line 659
Recommended: =?gb2312?B?MzYw0MLOxbzgsuItMTItMDEtQ2hpIFNpbXAudHh0?= Alt
+ernative : /home/uxbod/extract/msg-1321526988-4755-0/1
Recommended: =?gb2312?B?MzYw0MLChLFPnHktMTItMDEtQ2hpIFRyYWQudHh0?= Alt
+ernative : /home/uxbod/extract/msg-1321526988-4755-0/1-1

[download]

As you can see the last two MIME entities are encoded using gb2312 but how can I get that to be the correct name on the file system ? If I extract the file through an email client and transfer it across to that system it does look okay:

-rw-r--r-- 1 uxbod uxbod 34304 Nov 15 10:42 撰稿材料.doc

Any help would be very very much appreciated.

Replies are listed 'Best First'.
Re: MIME::Parser::Filer and filenames in Simplified Chinese
by zwon (Abbot) on Nov 17, 2011 at 15:57 UTC

    Can't help with MIME::Parser, but you can decode name yourself: 

    use 5.010;
use strict;
use warnings;
use open qw(:utf8 :std);

use Encode::MIME::EncWords;
use Encode qw/encode decode/;

my $fname = '=?gb2312?B?MzYw0MLOxbzgsuItMTItMDEtQ2hpIFNpbXAudHh0?=';
say decode('MIME-EncWords', $fname);

    [download]
[reply]
[d/l]

      Thanks Zwon. I have managed to get a little further but now I have an issue between Simplified and Traditional Chinese.

      The MIME encoding for the following file name

      =?gb2312?B?MzYw0MLOxbzgsuItMTItMDEtQ2hpIFNpbXAudHh0?=

      should decode to:

      DPM2007exchange電郵與郵箱修復.zip

      but when I try and decode that name in Perl it comes out as:

      DPM2007exchange���]�c�]箱修��.zip

      I have installed the Encode::HanExtra module but even with that it is still not showing correctly. Am I missing some other type of module ?

[reply]

        comes out as where? Showing correctly where?

        Does the program produce the correct bytes?

[reply]

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