Re: File Transfer between c and perl sockets

[Merlin42]

I am guessing that sending STX and ETX is part of the protocol for this pro*c thing. This is definately not part of IO::socket. A socket is to be considered a stream of bytes (assuming TCP) and nothing more. My guess is that the STX/ETX are there to allow several files to be sent over a single socket connection. In http/1.0 eg each file is sent in a seperate connection so closing the connection signals EOF. One thing you might have to worry about is any kind of escaping/stuffing required in case the file happens to contain ETX.

[wileykt]

I was able to get this working, so I wanted to explain what I was talking about earlier. Yes, IO::socket works simply by opening and closing connections, and so do the c programs I need the PERL to communicate with. But the difference is the c programs need a flag to tell it when the transactions started and ended, STX and ETX whose unix octals are \002 and \003. I was able to get this working simply by adding two print $server lines with the \002 and \003 before and after the files sent.

By the way pro*c is just a version of c that works with embedded sql. It really has nothing to do with the sockets other than that the author was using a table to store constants in.