cpython/Lib/test/test_socketserver.py

293 lines
9.4 KiB
Python

"""
Test suite for socketserver.
"""
import _imp as imp
import contextlib
import os
import select
import signal
import socket
import select
import errno
import tempfile
import unittest
import socketserver
import test.support
from test.support import reap_children, reap_threads, verbose
try:
import threading
except ImportError:
threading = None
test.support.requires("network")
TEST_STR = b"hello world\n"
HOST = test.support.HOST
HAVE_UNIX_SOCKETS = hasattr(socket, "AF_UNIX")
requires_unix_sockets = unittest.skipUnless(HAVE_UNIX_SOCKETS,
'requires Unix sockets')
HAVE_FORKING = hasattr(os, "fork")
requires_forking = unittest.skipUnless(HAVE_FORKING, 'requires forking')
def signal_alarm(n):
"""Call signal.alarm when it exists (i.e. not on Windows)."""
if hasattr(signal, 'alarm'):
signal.alarm(n)
# Remember real select() to avoid interferences with mocking
_real_select = select.select
def receive(sock, n, timeout=20):
r, w, x = _real_select([sock], [], [], timeout)
if sock in r:
return sock.recv(n)
else:
raise RuntimeError("timed out on %r" % (sock,))
if HAVE_UNIX_SOCKETS:
class ForkingUnixStreamServer(socketserver.ForkingMixIn,
socketserver.UnixStreamServer):
pass
class ForkingUnixDatagramServer(socketserver.ForkingMixIn,
socketserver.UnixDatagramServer):
pass
@contextlib.contextmanager
def simple_subprocess(testcase):
pid = os.fork()
if pid == 0:
# Don't raise an exception; it would be caught by the test harness.
os._exit(72)
yield None
pid2, status = os.waitpid(pid, 0)
testcase.assertEqual(pid2, pid)
testcase.assertEqual(72 << 8, status)
@unittest.skipUnless(threading, 'Threading required for this test.')
class SocketServerTest(unittest.TestCase):
"""Test all socket servers."""
def setUp(self):
signal_alarm(60) # Kill deadlocks after 60 seconds.
self.port_seed = 0
self.test_files = []
def tearDown(self):
signal_alarm(0) # Didn't deadlock.
reap_children()
for fn in self.test_files:
try:
os.remove(fn)
except OSError:
pass
self.test_files[:] = []
def pickaddr(self, proto):
if proto == socket.AF_INET:
return (HOST, 0)
else:
# XXX: We need a way to tell AF_UNIX to pick its own name
# like AF_INET provides port==0.
dir = None
fn = tempfile.mktemp(prefix='unix_socket.', dir=dir)
self.test_files.append(fn)
return fn
def make_server(self, addr, svrcls, hdlrbase):
class MyServer(svrcls):
def handle_error(self, request, client_address):
self.close_request(request)
self.server_close()
raise
class MyHandler(hdlrbase):
def handle(self):
line = self.rfile.readline()
self.wfile.write(line)
if verbose: print("creating server")
server = MyServer(addr, MyHandler)
self.assertEqual(server.server_address, server.socket.getsockname())
return server
@reap_threads
def run_server(self, svrcls, hdlrbase, testfunc):
server = self.make_server(self.pickaddr(svrcls.address_family),
svrcls, hdlrbase)
# We had the OS pick a port, so pull the real address out of
# the server.
addr = server.server_address
if verbose:
print("ADDR =", addr)
print("CLASS =", svrcls)
t = threading.Thread(
name='%s serving' % svrcls,
target=server.serve_forever,
# Short poll interval to make the test finish quickly.
# Time between requests is short enough that we won't wake
# up spuriously too many times.
kwargs={'poll_interval':0.01})
t.daemon = True # In case this function raises.
t.start()
if verbose: print("server running")
for i in range(3):
if verbose: print("test client", i)
testfunc(svrcls.address_family, addr)
if verbose: print("waiting for server")
server.shutdown()
t.join()
server.server_close()
if verbose: print("done")
def stream_examine(self, proto, addr):
s = socket.socket(proto, socket.SOCK_STREAM)
s.connect(addr)
s.sendall(TEST_STR)
buf = data = receive(s, 100)
while data and b'\n' not in buf:
data = receive(s, 100)
buf += data
self.assertEqual(buf, TEST_STR)
s.close()
def dgram_examine(self, proto, addr):
s = socket.socket(proto, socket.SOCK_DGRAM)
s.sendto(TEST_STR, addr)
buf = data = receive(s, 100)
while data and b'\n' not in buf:
data = receive(s, 100)
buf += data
self.assertEqual(buf, TEST_STR)
s.close()
def test_TCPServer(self):
self.run_server(socketserver.TCPServer,
socketserver.StreamRequestHandler,
self.stream_examine)
def test_ThreadingTCPServer(self):
self.run_server(socketserver.ThreadingTCPServer,
socketserver.StreamRequestHandler,
self.stream_examine)
@requires_forking
def test_ForkingTCPServer(self):
with simple_subprocess(self):
self.run_server(socketserver.ForkingTCPServer,
socketserver.StreamRequestHandler,
self.stream_examine)
@requires_unix_sockets
def test_UnixStreamServer(self):
self.run_server(socketserver.UnixStreamServer,
socketserver.StreamRequestHandler,
self.stream_examine)
@requires_unix_sockets
def test_ThreadingUnixStreamServer(self):
self.run_server(socketserver.ThreadingUnixStreamServer,
socketserver.StreamRequestHandler,
self.stream_examine)
@requires_unix_sockets
@requires_forking
def test_ForkingUnixStreamServer(self):
with simple_subprocess(self):
self.run_server(ForkingUnixStreamServer,
socketserver.StreamRequestHandler,
self.stream_examine)
def test_UDPServer(self):
self.run_server(socketserver.UDPServer,
socketserver.DatagramRequestHandler,
self.dgram_examine)
def test_ThreadingUDPServer(self):
self.run_server(socketserver.ThreadingUDPServer,
socketserver.DatagramRequestHandler,
self.dgram_examine)
@requires_forking
def test_ForkingUDPServer(self):
with simple_subprocess(self):
self.run_server(socketserver.ForkingUDPServer,
socketserver.DatagramRequestHandler,
self.dgram_examine)
# Alas, on Linux (at least) recvfrom() doesn't return a meaningful
# client address so this cannot work:
# @requires_unix_sockets
# def test_UnixDatagramServer(self):
# self.run_server(socketserver.UnixDatagramServer,
# socketserver.DatagramRequestHandler,
# self.dgram_examine)
#
# @requires_unix_sockets
# def test_ThreadingUnixDatagramServer(self):
# self.run_server(socketserver.ThreadingUnixDatagramServer,
# socketserver.DatagramRequestHandler,
# self.dgram_examine)
#
# @requires_unix_sockets
# @requires_forking
# def test_ForkingUnixDatagramServer(self):
# self.run_server(socketserver.ForkingUnixDatagramServer,
# socketserver.DatagramRequestHandler,
# self.dgram_examine)
@reap_threads
def test_shutdown(self):
# Issue #2302: shutdown() should always succeed in making an
# other thread leave serve_forever().
class MyServer(socketserver.TCPServer):
pass
class MyHandler(socketserver.StreamRequestHandler):
pass
threads = []
for i in range(20):
s = MyServer((HOST, 0), MyHandler)
t = threading.Thread(
name='MyServer serving',
target=s.serve_forever,
kwargs={'poll_interval':0.01})
t.daemon = True # In case this function raises.
threads.append((t, s))
for t, s in threads:
t.start()
s.shutdown()
for t, s in threads:
t.join()
s.server_close()
def test_tcpserver_bind_leak(self):
# Issue #22435: the server socket wouldn't be closed if bind()/listen()
# failed.
# Create many servers for which bind() will fail, to see if this result
# in FD exhaustion.
for i in range(1024):
with self.assertRaises(OverflowError):
socketserver.TCPServer((HOST, -1),
socketserver.StreamRequestHandler)
def test_main():
if imp.lock_held():
# If the import lock is held, the threads will hang
raise unittest.SkipTest("can't run when import lock is held")
test.support.run_unittest(SocketServerTest)
if __name__ == "__main__":
test_main()