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import socket
import struct
import json
def unpack_varint(s):
d = 0
for i in range(5):
b = ord(s.recv(1))
d |= (b & 0x7F) << 7*i
if not b & 0x80:
return d
def pack_varint(d):
o = ""
while True:
b = d & 0x7F
d >>= 7
o += struct.pack("B", b | (0x80 if d > 0 else 0))
if d == 0:
return o
def pack_data(d):
return pack_varint(len(d)) + d
def pack_port(i):
return struct.pack('>H', i)
def get_info(host='localhost', port=25565):
# Connect
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host, port))
# Send handshake + status request
s.send(pack_data("\x00\x00" + pack_data(host.encode('utf8')) + pack_port(port) + "\x01"))
# Read response
unpack_varint(s) # Packet length
unpack_varint(s) # Packet ID
l = unpack_varint(s) # String length
d = ""
while len(d) < l:
d += s.recv(1024)
# Close our socket
# Load json and return
return json.loads(d.decode('utf8'))

Thanks for this! I wrote a simple OO wrapper using it as a base.

mid-kid commented May 29, 2014

Thanks for this! I used the *_varint functions to create a simple chat client.

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