I'm attempting to create a script in ruby that connects to a Minecraft server via TCP and fetches the current number of players much like the PHP script at http://www.webmaster-source.com/2012/07/05/checking-the-status-of-a-minecraft-server-with-php/
When running the code below I get �Took too long to log in
require 'socket'
server = TCPSocket.new '192.241.174.210', 25565
while line = server.gets
puts line
end
server.close
What am I doing wrong here?
you're not sending this:
fwrite($sock, "\xfe");
from the script you linked. You have to send that before you call read, like they do.
Basically the server is waiting for you to send data and when you don't after a timeout, you are disconnected.
Related
I am writing a simple server in Ruby in order to understand the Socket module. Here is my code:
require 'socket'
s = TCPServer.new(3939)
loop do
c = s.accept
STDERR.puts c.gets
c.close
end
I simply want to print the request to the server console before closing the socket. Why does it print the request thrice, instead of just once?
If I curl that code
$ curl localhost:3939
I get an empty reply
curl: (52) Empty reply from server
and a single GET request
GET / HTTP/1.1
I'm trying to go through this particular code example from "The Well Grounded Rubyist" regarding TCPServer and threads. The code is below:
require 'socket'
server = TCPServer.new(3939)
connect = server.accept
connect.puts "Hi. Here's the date."
connect.puts 'date'
connect.close
server.close
How do I know what port is on my Macbook? The docs has 2000 in the example. However, when I try both of these numbers the code doesn't execute, it continues to hang indefinitely.
How can I check if these numbers are verified ports? I tried telnetting to the port number and the connection is refused everytime.
server.accepts waits for a client to connect to the server. If that does not happen, it just keeps waiting. Run the code, then open terminal and type:
require 'socket'
s = TCPSocket.new 'localhost', 3939
At this point you will create TCPSocket, which will connect with your server. This will cause the rest of the code to execute. You can check it with your socket:
while line = s.gets # Read lines from socket
puts line # and print them
end
I have a TCP server running which accepts the command "GETHELLO" and return "HELLO".
I test it by using Telnet in linux shell :
:~$ telnet 192.168.1.10 3000
Trying 192.168.1.10...
Connected to 192.168.1.10.
Escape character is '^]'.
GETHELLO
HELLO
How can I do this in ruby using TCPSocket ? (send "GETHELLO" and read the data "HELLO" returned by the server)
Thanks!
require 'socket'
sock = TCPSocket.new('192.168.1.10', 3000)
sock.write 'GETHELLO'
puts sock.read(5) # Since the response message has 5 bytes.
sock.close
I'm trying to create a socket in Ruby using
require "socket"
w = UNIXSocket.new("socket")
and I keep running into
No such file or directory - socket (Errno::ENOENT)
This looks completely backwards to me, because new() is supposed to create that missing file. What am I missing?
This is super old. Please don't try to use it verbatim anymore.
http://blog.antarestrader.com/posts/153
#!/ruby
file = 'path/to/my/socket'
File.unlink if File.exists(file) && File.socket?(file)
server = UNIXServer.new(file)
# return a UNIXSocket once a connection is made
socket = server.accept
# socket is now ready to communicate.
UnixServer makes the socket, UnixSocket only connects to an existing socket.
I am looking for possibility to have ruby-based webserver communicating by pipe, not by TCP/IP. So I will send HTTP request by pipe and I want to read response by pipe. It should be used as bundled/internal webserver (RPC or something) for desktop application. I don't want to handle ports configuration when there will be more instances of my application running on same machine.
Any ideas?
Thank you in advance.
Try a UNIXSocket You use a local path to specify where the socket connection is,
not a port, and you can easily handle multiple simultaneous connections.
# server.rb
require 'socket'
File.delete( filename ) if File.exists? filename
server = UNIXServer.open( filename )
server.listen( queuesize )
puts "waiting on client connection"
while client= server.accept
puts "got client connection #{client.inspect}"
child_pid = fork do
puts "Asking the client what they want"
client.puts "Welcome to your server, what can I get for you?"
until client.eof?
line = client.gets
puts "The client wants #{line.chomp.inspect}"
end
client.close
end
puts "running server (#{child_pid})"
client.close
Process.detach(child_pid)
end
server.close
# client.rb
require 'socket'
puts "requesting server connection"
server = UNIXSocket.new( filename )
puts "got server connection #{server}"
line = server.gets
puts "The server said: #{line.chomp.inspect}"
%w{ a-pony a-puppy a-kitten a-million-dollars }.each do |item|
server.puts item
end
server.close
Pipe is for one-way communication, so there is no way you can set up webserver on that. You might try with unix socket. But really simplest solution is to use loopback (127.0.0.1). It's highly optimized, so the speed won't be a problem.
Not an answer to your question. However, if you do end up having to use a TCP/IP HTTP Server, you should ensure that it's only listening on 127.0.0.1. Listening on the local host address should be quite fast, as it won't hit the network, and will also make it a tad more secure to stop people connecting from the outside.
Thin supports unix sockets.