205 lines
8.5 KiB
Python
205 lines
8.5 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
||
|
|
||
|
from __future__ import absolute_import, division, print_function, with_statement
|
||
|
import logging
|
||
|
import os
|
||
|
import signal
|
||
|
import subprocess
|
||
|
import sys
|
||
|
from tornado.httpclient import HTTPClient, HTTPError
|
||
|
from tornado.httpserver import HTTPServer
|
||
|
from tornado.ioloop import IOLoop
|
||
|
from tornado.log import gen_log
|
||
|
from tornado.process import fork_processes, task_id, Subprocess
|
||
|
from tornado.simple_httpclient import SimpleAsyncHTTPClient
|
||
|
from tornado.testing import bind_unused_port, ExpectLog, AsyncTestCase
|
||
|
from tornado.test.util import unittest, skipIfNonUnix
|
||
|
from tornado.web import RequestHandler, Application
|
||
|
|
||
|
|
||
|
def skip_if_twisted():
|
||
|
if IOLoop.configured_class().__name__.endswith('TwistedIOLoop'):
|
||
|
raise unittest.SkipTest("Process tests not compatible with TwistedIOLoop")
|
||
|
|
||
|
# Not using AsyncHTTPTestCase because we need control over the IOLoop.
|
||
|
|
||
|
|
||
|
@skipIfNonUnix
|
||
|
class ProcessTest(unittest.TestCase):
|
||
|
def get_app(self):
|
||
|
class ProcessHandler(RequestHandler):
|
||
|
def get(self):
|
||
|
if self.get_argument("exit", None):
|
||
|
# must use os._exit instead of sys.exit so unittest's
|
||
|
# exception handler doesn't catch it
|
||
|
os._exit(int(self.get_argument("exit")))
|
||
|
if self.get_argument("signal", None):
|
||
|
os.kill(os.getpid(),
|
||
|
int(self.get_argument("signal")))
|
||
|
self.write(str(os.getpid()))
|
||
|
return Application([("/", ProcessHandler)])
|
||
|
|
||
|
def tearDown(self):
|
||
|
if task_id() is not None:
|
||
|
# We're in a child process, and probably got to this point
|
||
|
# via an uncaught exception. If we return now, both
|
||
|
# processes will continue with the rest of the test suite.
|
||
|
# Exit now so the parent process will restart the child
|
||
|
# (since we don't have a clean way to signal failure to
|
||
|
# the parent that won't restart)
|
||
|
logging.error("aborting child process from tearDown")
|
||
|
logging.shutdown()
|
||
|
os._exit(1)
|
||
|
# In the surviving process, clear the alarm we set earlier
|
||
|
signal.alarm(0)
|
||
|
super(ProcessTest, self).tearDown()
|
||
|
|
||
|
def test_multi_process(self):
|
||
|
# This test can't work on twisted because we use the global reactor
|
||
|
# and have no way to get it back into a sane state after the fork.
|
||
|
skip_if_twisted()
|
||
|
with ExpectLog(gen_log, "(Starting .* processes|child .* exited|uncaught exception)"):
|
||
|
self.assertFalse(IOLoop.initialized())
|
||
|
sock, port = bind_unused_port()
|
||
|
|
||
|
def get_url(path):
|
||
|
return "http://127.0.0.1:%d%s" % (port, path)
|
||
|
# ensure that none of these processes live too long
|
||
|
signal.alarm(5) # master process
|
||
|
try:
|
||
|
id = fork_processes(3, max_restarts=3)
|
||
|
self.assertTrue(id is not None)
|
||
|
signal.alarm(5) # child processes
|
||
|
except SystemExit as e:
|
||
|
# if we exit cleanly from fork_processes, all the child processes
|
||
|
# finished with status 0
|
||
|
self.assertEqual(e.code, 0)
|
||
|
self.assertTrue(task_id() is None)
|
||
|
sock.close()
|
||
|
return
|
||
|
try:
|
||
|
if id in (0, 1):
|
||
|
self.assertEqual(id, task_id())
|
||
|
server = HTTPServer(self.get_app())
|
||
|
server.add_sockets([sock])
|
||
|
IOLoop.instance().start()
|
||
|
elif id == 2:
|
||
|
self.assertEqual(id, task_id())
|
||
|
sock.close()
|
||
|
# Always use SimpleAsyncHTTPClient here; the curl
|
||
|
# version appears to get confused sometimes if the
|
||
|
# connection gets closed before it's had a chance to
|
||
|
# switch from writing mode to reading mode.
|
||
|
client = HTTPClient(SimpleAsyncHTTPClient)
|
||
|
|
||
|
def fetch(url, fail_ok=False):
|
||
|
try:
|
||
|
return client.fetch(get_url(url))
|
||
|
except HTTPError as e:
|
||
|
if not (fail_ok and e.code == 599):
|
||
|
raise
|
||
|
|
||
|
# Make two processes exit abnormally
|
||
|
fetch("/?exit=2", fail_ok=True)
|
||
|
fetch("/?exit=3", fail_ok=True)
|
||
|
|
||
|
# They've been restarted, so a new fetch will work
|
||
|
int(fetch("/").body)
|
||
|
|
||
|
# Now the same with signals
|
||
|
# Disabled because on the mac a process dying with a signal
|
||
|
# can trigger an "Application exited abnormally; send error
|
||
|
# report to Apple?" prompt.
|
||
|
# fetch("/?signal=%d" % signal.SIGTERM, fail_ok=True)
|
||
|
# fetch("/?signal=%d" % signal.SIGABRT, fail_ok=True)
|
||
|
# int(fetch("/").body)
|
||
|
|
||
|
# Now kill them normally so they won't be restarted
|
||
|
fetch("/?exit=0", fail_ok=True)
|
||
|
# One process left; watch it's pid change
|
||
|
pid = int(fetch("/").body)
|
||
|
fetch("/?exit=4", fail_ok=True)
|
||
|
pid2 = int(fetch("/").body)
|
||
|
self.assertNotEqual(pid, pid2)
|
||
|
|
||
|
# Kill the last one so we shut down cleanly
|
||
|
fetch("/?exit=0", fail_ok=True)
|
||
|
|
||
|
os._exit(0)
|
||
|
except Exception:
|
||
|
logging.error("exception in child process %d", id, exc_info=True)
|
||
|
raise
|
||
|
|
||
|
|
||
|
@skipIfNonUnix
|
||
|
class SubprocessTest(AsyncTestCase):
|
||
|
def test_subprocess(self):
|
||
|
subproc = Subprocess([sys.executable, '-u', '-i'],
|
||
|
stdin=Subprocess.STREAM,
|
||
|
stdout=Subprocess.STREAM, stderr=subprocess.STDOUT,
|
||
|
io_loop=self.io_loop)
|
||
|
self.addCleanup(lambda: os.kill(subproc.pid, signal.SIGTERM))
|
||
|
subproc.stdout.read_until(b'>>> ', self.stop)
|
||
|
self.wait()
|
||
|
subproc.stdin.write(b"print('hello')\n")
|
||
|
subproc.stdout.read_until(b'\n', self.stop)
|
||
|
data = self.wait()
|
||
|
self.assertEqual(data, b"hello\n")
|
||
|
|
||
|
subproc.stdout.read_until(b">>> ", self.stop)
|
||
|
self.wait()
|
||
|
subproc.stdin.write(b"raise SystemExit\n")
|
||
|
subproc.stdout.read_until_close(self.stop)
|
||
|
data = self.wait()
|
||
|
self.assertEqual(data, b"")
|
||
|
|
||
|
def test_close_stdin(self):
|
||
|
# Close the parent's stdin handle and see that the child recognizes it.
|
||
|
subproc = Subprocess([sys.executable, '-u', '-i'],
|
||
|
stdin=Subprocess.STREAM,
|
||
|
stdout=Subprocess.STREAM, stderr=subprocess.STDOUT,
|
||
|
io_loop=self.io_loop)
|
||
|
self.addCleanup(lambda: os.kill(subproc.pid, signal.SIGTERM))
|
||
|
subproc.stdout.read_until(b'>>> ', self.stop)
|
||
|
self.wait()
|
||
|
subproc.stdin.close()
|
||
|
subproc.stdout.read_until_close(self.stop)
|
||
|
data = self.wait()
|
||
|
self.assertEqual(data, b"\n")
|
||
|
|
||
|
def test_stderr(self):
|
||
|
subproc = Subprocess([sys.executable, '-u', '-c',
|
||
|
r"import sys; sys.stderr.write('hello\n')"],
|
||
|
stderr=Subprocess.STREAM,
|
||
|
io_loop=self.io_loop)
|
||
|
self.addCleanup(lambda: os.kill(subproc.pid, signal.SIGTERM))
|
||
|
subproc.stderr.read_until(b'\n', self.stop)
|
||
|
data = self.wait()
|
||
|
self.assertEqual(data, b'hello\n')
|
||
|
|
||
|
def test_sigchild(self):
|
||
|
# Twisted's SIGCHLD handler and Subprocess's conflict with each other.
|
||
|
skip_if_twisted()
|
||
|
Subprocess.initialize(io_loop=self.io_loop)
|
||
|
self.addCleanup(Subprocess.uninitialize)
|
||
|
subproc = Subprocess([sys.executable, '-c', 'pass'],
|
||
|
io_loop=self.io_loop)
|
||
|
subproc.set_exit_callback(self.stop)
|
||
|
ret = self.wait()
|
||
|
self.assertEqual(ret, 0)
|
||
|
self.assertEqual(subproc.returncode, ret)
|
||
|
|
||
|
def test_sigchild_signal(self):
|
||
|
skip_if_twisted()
|
||
|
Subprocess.initialize(io_loop=self.io_loop)
|
||
|
self.addCleanup(Subprocess.uninitialize)
|
||
|
subproc = Subprocess([sys.executable, '-c',
|
||
|
'import time; time.sleep(30)'],
|
||
|
io_loop=self.io_loop)
|
||
|
subproc.set_exit_callback(self.stop)
|
||
|
os.kill(subproc.pid, signal.SIGTERM)
|
||
|
ret = self.wait()
|
||
|
self.assertEqual(subproc.returncode, ret)
|
||
|
self.assertEqual(ret, -signal.SIGTERM)
|