Re: [Mimedefang] utf-8 issue?

2017-12-14 Thread Bill Cole 

On 14 Dec 2017, at 9:14 (-0500), Dianne Skoll wrote:


On Wed, 13 Dec 2017 20:37:36 -0500
"Bill Cole"  wrote:


-return IO::File->new(\ $self->{MBS_Data}, $mode);
+return IO::Scalar->new(\ $self->{MBS_Data}, $mode);


This will cause other problems down the line.  I suggest you
study the section "Byte and Character Semantics" in the perlunicode
man page.


Thanks for the reference and for your patience with my confusion. I 
understand much better now: anything expressed as a string has to make 
sense as a series of encoded characters, not a series of bytes.


And as `strings PerlIO/scalar/scalar.bundle` says: "Strings with code 
points over 0xFF may not be mapped into in-memory file handles"



Modern Perl does let you open a "file" by passing a reference
to a scalar; it has built-in in-memory I/O.


Indeed. I was fooled by the fact that deep inside the 'open' call stack, 
both $! and $^E get set to "No such file or directory" but that's 
because XSLoader looks for a .bs while loading PerlIO::scalar...


I couldn't find exactly where the "Invalid Argument" error (and matching 
numeric errno) is being generated, since it's in a debug-resistant 
return that pops 4 stack layers in one step, but I'm perfectly happy to 
believe that it's buried in PerlIO/scalar/scalar.bundle and is entirely 
proper.


--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Currently Seeking Steady Work: https://linkedin.com/in/billcole
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Re: [Mimedefang] Is calling action_rebuild() idempotent?

2017-12-14 Thread Dianne Skoll 
On Thu, 14 Dec 2017 08:52:32 -0800
Amit Gupta  wrote:

> If I call action_rebuild() a couple times in my filter_end code, could
> it have different effects depending on when it's called?

Nope.  All it does is set a flag informing mimedefang.pl it should rebuild
the message when filter_end is done.

Regards,

Dianne.
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[Mimedefang] Is calling action_rebuild() idempotent?

2017-12-14 Thread Amit Gupta 
If I call action_rebuild() a couple times in my filter_end code, could
it have different effects depending on when it's called?
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Re: [Mimedefang] utf-8 issue?

2017-12-14 Thread Dianne Skoll 
On Wed, 13 Dec 2017 20:37:36 -0500
"Bill Cole"  wrote:

> -return IO::File->new(\ $self->{MBS_Data}, $mode);
> +return IO::Scalar->new(\ $self->{MBS_Data}, $mode);

This will cause other problems down the line.  I suggest you
study the section "Byte and Character Semantics" in the perlunicode
man page.

Modern Perl does let you open a "file" by passing a reference
to a scalar; it has built-in in-memory I/O.

Regards,

Dianne.
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Re: [Mimedefang] utf-8 issue?

2017-12-14 Thread Dianne Skoll 
On Wed, 13 Dec 2017 21:03:27 -0500
"Bill Cole"  wrote:

> It is entirely possible (as stated explicitly in RFC2045) for a MIME 
> entity to contain unencoded binary data: any arbitrary stream of
> bytes.

Stream of *bytes* yes.  But Perl native characters > 0xFF are not bytes.

Regards,

Dianne.
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