Files
SysTray-X/app/ping_pong.py
2020-01-13 22:50:50 +01:00

65 lines
2.1 KiB
Python
Executable File

#!/usr/bin/python
import sys
import json
import struct
try:
# Python 3.x version
# Read a message from stdin and decode it.
def getMessage():
rawLength = sys.stdin.buffer.read(4)
if len(rawLength) == 0:
sys.exit(0)
messageLength = struct.unpack('@I', rawLength)[0]
message = sys.stdin.buffer.read(messageLength).decode('utf-8')
return json.loads(message)
# Encode a message for transmission,
# given its content.
def encodeMessage(messageContent):
encodedContent = json.dumps(messageContent).encode('utf-8')
encodedLength = struct.pack('@I', len(encodedContent))
return {'length': encodedLength, 'content': encodedContent}
# Send an encoded message to stdout
def sendMessage(encodedMessage):
sys.stdout.buffer.write(encodedMessage['length'])
sys.stdout.buffer.write(encodedMessage['content'])
sys.stdout.buffer.flush()
while True:
receivedMessage = getMessage()
if receivedMessage == "ping":
sendMessage(encodeMessage("pong3"))
except AttributeError:
# Python 2.x version (if sys.stdin.buffer is not defined)
# Read a message from stdin and decode it.
def getMessage():
rawLength = sys.stdin.read(4)
if len(rawLength) == 0:
sys.exit(0)
messageLength = struct.unpack('@I', rawLength)[0]
message = sys.stdin.read(messageLength)
return json.loads(message)
# Encode a message for transmission,
# given its content.
def encodeMessage(messageContent):
encodedContent = json.dumps(messageContent)
encodedLength = struct.pack('@I', len(encodedContent))
return {'length': encodedLength, 'content': encodedContent}
# Send an encoded message to stdout
def sendMessage(encodedMessage):
sys.stdout.write(encodedMessage['length'])
sys.stdout.write(encodedMessage['content'])
sys.stdout.flush()
while True:
sendMessage(encodeMessage("pong2"))
receivedMessage = getMessage()
if receivedMessage == "ping":
sendMessage(encodeMessage("pong2"))