To send data over a network, the data has to conform to a certain format or protocol. The Transmission Control
Protocol (TCP/IP) is one of the core protocols to be used on the Internet. The following screenshot shows how to communicate over TCP/IP between a Julia Tcp server and a client (see the code in Chapter 8\tcpserver.jl
):
The server (in the upper-left corner) is started in a Julia session with server = listen(8080)
that returns a TcpServer
object listening on the port 8080
. The line conn = accept(server)
waits for an incoming client to make a connection. Now, in a second terminal (in the lower-right corner), start the netcat (nc) tool at the prompt to make a connection with the Julia server on port 8080
, for example, nc localhost 8080
. Then, the accept
function creates a TcpSocket
object on which the server can read or write.
Then, the server issues the command line = readline(conn)
, blocking the server until it gets a full line (ending with a newline...