Admin: 2 revisions imported

2016-04-06T20:11:24Z

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= html2mime =

Below are several means of solving the 'This transaction appears to have no content' when users send pure HTML messages.

== Procmail ==

The script at the bottom of the page offers what looks like a very nice solution - I wish it was available when I ran across this problem. Unfortunately I had to roll my own; the result of a bunch of tweaking after running on a production system is presented below, for those interested in an alternative solution. Also uses procmail, along with "html2text" utility that's pretty widely available.

<nowiki>:0
#Ignore messages>599k
* <599000
* ^Content-Type: text/html
{
:0 fbw
| /usr/local/bin/html2text -nobs -style pretty -width 62

:0 fbw
| /usr/bin/sed 's/ />/g'

:0 Afw
| /usr/bin/sed 's/$Content-Type: text\/$html/\1plain/'
}

</nowiki>

----

== Perl script ==

=== v2 ===

A script that provides a text part as multipart/alternative, unlike the other options here, and other optional functionality.

http://pthbb.org/manual/software/mailfilter

=== v1 ===

rt: "|/home/rt/bin/html2mime | /usr/local/rt3/bin/rt-mailgate --queue "General" --action correspond --url http://whatever/"

The script is so small that I put it directly here:

<nowiki>#!/usr/bin/perl
# 1.0 - XXXX - original version

use strict;
use Mail::Field;
use MIME::Parser;
use MIME::Entity;
use HTML::TreeBuilder;
use HTML::FormatText;

# because MIME silently writes local files
chdir("/tmp/");

my $parser = new MIME::Parser;
my $entity = $parser->parse(\*STDIN) or die "parse failed\n";

# Parse only non-multipart text/html mime-type
if ( ($entity->is_multipart) ||
($entity->mime_type ne "text/html") ) {
$entity->print(\*STDOUT);
exit 0;
}

# Decode body
my $bh = $entity->bodyhandle;

my $tree = HTML::TreeBuilder->new();
$tree->utf8_mode();
$tree->parse($bh->as_string);

my $formatter = HTML::FormatText->new(leftmargin => 0, rightmargin => 72);
my $txt= $formatter->format($tree);

my $txtEntity=MIME::Entity->build(Data => $txt,
Type => "text/plain",
#Encoding => "quoted-printable"
Encoding => "8bit"
);

$entity->make_multipart;
$entity->add_part($txtEntity,0);

$entity->print(\*STDOUT);
</nowiki>

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