I don't know of an existing module but you could do it something like this:
sub get_nice_chunk {
my($fh, $size) = @_;
local $/ = '';
local $_;
my $chunk;
$chunk .= $_
while $_ = <$fh> and length($_) + length($chunk) < $size;
seek $fh, tell($fh) - length($_), 0
if length($_) + length($chunk) < $size;
return $chunk;
}
print "got chunk: $_"
while $_ = get_nice_chunk(\*DATA, 19);
__DATA__
foo
bar
baz
quux
ichi
ni
san
shi
the
last
bit
So that just sets the INPUT_RECORD_SEPARATOR to paragraph mode, reads paragraphs until we've hit the $size limit, rewinds the file pointer and returns the chunk. However, this does suffer from the bug that it won't read pargraphs greater than $size but I'll leave that as an exercise to the OP of what to do in that case.
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