Plack::TempBuffer(3)temporary buffer to save bytes
my $buf = Plack::TempBuffer->new($length); $buf->print($bytes); my $size = $buf->size; my $fh = $buf->rewind;
Plack::TempBuffer is a buffer class to store arbitrary length of byte
strings and then get a seekable filehandle once everything is
buffered. It uses PerlIO and/or temporary file to save the buffer
depending on the length of the size.