Process $body with decodeHeader()?

Hi,

This isn't a bug report but a simple question.

In src/compose.php, body of a message is passed to decodeHeader().
Why $body is passed to decodeHeader()?

SM-1_4-STABLE: about line 1316 of src/compose.php:

    echo sm_encode_html_special_chars(decodeHeader($body,false,false,true));

trunk: about line 1398 of src/compose.php:

    $body_str = sm_encode_html_special_chars(decodeHeader($body,false,false));

There was a bad scenario.

1. Accidently (or intentionally) body text contains encoded MIME
   header string such as "=?iso-2022-jp?B ...".

2. decodeHeader() decodes such ""=?iso-2022-jp?B ..." string into
   iso-2022-jp (or other none UTF-8 string) encoded string.

3. Body is expected to UTF-8 or EUC-JP and really contain such string
   in the encoding.

4. As a result, multiple text encopding are miexed and it cause
   strange garbled characters.

I hope $body should be already properly encoded and no need to decode
header any more at that time.

Best regards.

-- 
Takahiro Kambe <[email protected]>

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