How to correctly send binary data over HTTPS POST?

Question

I send binary data from client (Debian 6.0.3) to server (Windows Server 2003). To bypass most firewalls I use HTTPS POST. Client and server are implemented usin

Answer 1

I was misled from the start with this problem. Narrowed it down to surprising details:

Sending over SSL socket fails if I use Boost.Asio multi-buffers in Boost v.1.48 (the most recent one at this moment). Example:

// data to send, protocol is [packet size: 4 bytes][packet: packet_size bytes]
std::vector packet = ...;
uint32_t packet_size = packet.size();
// prepare buffers
boost::array bufs = {{boost::asio::buffer(&packet_size, sizeof(packet_size)), boost::asio::buffer(packet)}};
// send multi buffers by single call
boost::asio::async_write(socket, bufs, ...);

Sending separately packet_size and packet in this example works around the problem. I'm far from calling any suspicious behavior as a bug, especially if it's related with Boost libraries. But this one really looks like a bug. Tried on Boost v.1.47 - works fine. Tried with usual TCP socket (not SSL one) - works fine. The same on both Linux and Windows.

I'm going to find any reports about this problem in Asio mailing list and will report it if nothing found.