Ruby - How to send a text string from a TCP Server to a client on a different computer with Ruby? - ruby

Question

I've been trying to learn this for days and nothing is working. When I write code like this
for the client.
require 'socket'
tcp_client=TCPSocket.new('localhost',2000)
while grab_string=tcp_client.gets
puts(grab_string)
end
tcp_client.close
and code like this for the server.
# Set up a server program.
require 'socket'
tcp_server=TCPServer.new(2000)
loop{
waiting_client=tcp_server.accept
path='C:\Users\Nil_Face\Music\Bad Religion - Anxiety.mp3'
test=File.new(path,'rb')
waiting_client.puts(File.basename(path))
test.close
waiting_client.close
}
It works just fine but when I use that server on my desktop and try to get that text string to appear on the client located on a different computer. It doesn't work. Why won't the client connect to the server when their both on different computers? And how can I get them to?

Answer 1

Your client is connecting to 'localhost', which is the same computer where the client runs.
tcp_client=TCPSocket.new('localhost',2000)
The client should be connecting to the hostname/ip of the machine on which the server is running. Change 'localhost' with the IPv4 address / inet addr of the server machine, in this case '192.168.1.10'.
On windows:
ipconfig
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : local.domain
IPv4 Address. . . . . . . . . . . : 192.168.1.10
On Linux:
# /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr FF:FF:FF:FF:FF:FF
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
If you're getting connection timed out. You can try connecting with telnet from the command prompt:
telnet 192.168.1.10 2000
From the server computer, you can also verify that the server is running and is accepting connections with netstat:
netstat -an
Active Connections
Proto Local Address Foreign Address State
TCP 0.0.0.0:2000 0.0.0.0:0 LISTENING
If those are all correct, you probably have a firewall that is blocking the connection.