Python Low-Overhead Profiler
i m unable to boot usb flash drive in virtual box. so I installed plop for boot options, after which i was able to use "usb boot option" after which i got a blank 'black dos screen' . Usb is bootable and works fine on my physical laptop. I think may it is something related to bios as this feature is not provided in virtual box. Any ideas ? What could be the possible reason ?
-i installed the extension pack 4.1.26 for usb support in vbox (same version as that of VBox)
-i tried plop version 5.0.13 and 5.0.14
Or suggest me any alternative to plop so that i can boot usb in VBox.
Source: (StackOverflow)
I'm trying to give my users the option of password protecting the PDFs they create via PDFLib. I've read the documentation regarding PLOP, and came across the following paragraph in appendix A of the the manual (located here):
Memory-Based Combination The memory-based method is faster, but requires more
memory. It is recommended for dynamic PDF generation and signature in Web applications
unless you deal with very large documents. Instead of generating a PDF file on
disk with PDFlib, use in-core PDF generation by supplying an empty file name to
PDF_begin_document( ), fetch the contents of the buffer containing the generated PDF
data using PDF_get_buffer( ), and create a virtual file with PLOP_create_pvf( ) . The file
name used for the virtual file can then be passed to PLOP/PLOP DS using
PLOP_open_document( ) without having to create a physical file on disk. Note that it is
not possible to fetch the PDFlib buffer contents in multiple portions since the full document
must be supplied to PLOP/PLOP DS in a single buffer. Therefore you must call
PDF_get_buffer( ) between PDF_end_document( ) and PDF_delete( ).
The hellosign programming sample, which is included in all PLOP packages, demonstrates
how to use PDFlib for dynamically creating a PDF document and passing it to
PLOP in memory for applying a digital signature.
So far I have the following method written, to be called prior to PDF_end_document(), as the manual instructs:
function encrypt_pdf($pdf_buffer, $password) {
$optlist = '';
$filename = "temp";
create_pvf($filename, $pdf_buffer, $optlist);
$optlist = "masterpassword=$password";
open_document($filename, $optlist);
$doc = create_file($filename, $optlist);
}
I have no idea how to proceed from here. There is no documentation that I've found that even remotely covers what I'm trying to do (even though I imagine this is a common usage of the PLOP API).
How can I complete this method, and password protect my output PDF?
Source: (StackOverflow)