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import sys
import io
import json
import multiprocessing
import threading
import time
from logs import log
from rmq import Rmq
rmq = Rmq()
def execute(body):
msg = body.decode('utf-8')
log.info(f"incoming: {msg}")
failed = False
old_stdout = sys.stdout
old_stderr = sys.stderr
redirected_output = sys.stdout = io.StringIO()
redirected_error = sys.stderr = io.StringIO()
snek_msg = json.loads(msg)
snekid = snek_msg['snekid']
snekcode = snek_msg['message'].strip()
try:
exec(snekcode)
except Exception as e:
failed = str(e)
finally:
sys.stdout = old_stdout
sys.stderr = old_stderr
if failed:
result = failed.strip()
log.debug(f"this was captured via exception: {result}")
result_err = redirected_error.getvalue().strip()
result_ok = redirected_output.getvalue().strip()
if result_err:
log.debug(f"this was captured via stderr: {result_err}")
result = result_err
if result_ok:
result = result_ok
log.info(f"outgoing: {result}")
rmq.publish(result,
queue=snekid,
routingkey=snekid,
exchange=snekid)
exit(0)
def stopwatch(process):
log.debug(f"10 second timer started for process {process.pid}")
for _ in range(10):
time.sleep(1)
if not process.is_alive():
log.debug(f"Clean exit on process {process.pid}")
exit(0)
process.terminate()
log.debug(f"Rerminated process {process.pid} forcefully")
def message_handler(ch, method, properties, body, thread_ws=None):
p = multiprocessing.Process(target=execute, args=(body,))
p.daemon = True
p.start()
t = threading.Thread(target=stopwatch, args=(p,))
t.daemon = True
t.start()
ch.basic_ack(delivery_tag=method.delivery_tag)
if __name__ == '__main__':
rmq.consume(callback=message_handler)
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