Python No JSON object could be decoded

Question

I am having an issue with JSON, I can't seem to figure out why this is not working. This is supposed to output JSON.

Here is my code

#!/usr/bin/env python
import socket
import struct
import json
def unpack_varint(s):
 d = 0
 i = 0
 while True:
 b = ord(s.recv(1))
 d |= (b & 0x7F) << 7*i
 i += 1
 if not b & 0x80:
 return d
def pack_data(d):
 return struct.pack('>b', len(d)) + d
def pack_port(i):
 return struct.pack('>H', i)
def get_info(host, 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"))
 s.send(pack_data("\x00"))
 # 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
 s.close()
 # Load json and return
 return json.loads(d.decode('utf8'))
get_info('162.213.43.124');

I am getting this error

Traceback (most recent call last):
 File "main.py", line 46, in 
 get_info('162.213.43.124');
 File "main.py", line 45, in get_info
 return json.loads(d.decode('utf8'))
 File "/usr/local/lib/python2.7/json/__init__.py", line 338, in loads
 return _default_decoder.decode(s)
 File "/usr/local/lib/python2.7/json/decoder.py", line 365, in decode
 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
 File "/usr/local/lib/python2.7/json/decoder.py", line 383, in raw_decode
 raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

If anyone could come to the rescue that would be awesome!

• Brian: > your json is invalid

Answer 1

It seems that you have invalid JSON. In that case, that's totally dependent on the data the server sends you which you have not shown. I would suggest running the response through a JSON validator.

• Mario: I'm new to python, how would I get the output that the server is sending so I could put it into JSON Validator?
• g.d.d.c: @Mario - print d.decode('utf-8') or if using python 3.x print(d.decode('utf-8'))