tcp-ip

How to implement a web client in bash

Are you able to write a Bash script that will download an HTTP resource from the web? The inputs are: $hostname $port $path $output You can't: use external commands other than telnet (no sed, no awk, no wget, ...) use other shells You can: use /dev/tcp pseudo devices use telnet Your MUST pass this test (you can cha...

What structure of data use to communicate via tcp/ip in java?

Let's assume I want to send many messages between 2 programs made in java that use TCP sockets. I think the most convienient way is to send objects like: PrintStream ps = new PrintStream(s.getOutputStream()); ObjectOutputStream oos = new ObjectOutputStream(ps); some_kind_of_object_here; oos.writeObject(some_kind_of_object_here);...

Discover a TCP/IP Socket?

I am using Objective-C and Java for this, but I think the question is language-neutral. I have an iOS client that talks to a Java server over TCP/IP. Right now I need to tell at least one of the parties the IP address of the other. Is there a standard way that I can "discover" IP addresses (from one side or the other)? Also, how would...