320 lines
11 KiB
Python
320 lines
11 KiB
Python
"""
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Test suite for SocketServer.py.
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"""
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import contextlib
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import imp
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import os
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import select
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import signal
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import socket
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import select
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import errno
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import tempfile
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import unittest
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import SocketServer
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import test.test_support
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from test.test_support import reap_children, reap_threads, verbose
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try:
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import threading
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except ImportError:
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threading = None
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test.test_support.requires("network")
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TEST_STR = "hello world\n"
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HOST = test.test_support.HOST
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HAVE_UNIX_SOCKETS = hasattr(socket, "AF_UNIX")
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HAVE_FORKING = hasattr(os, "fork") and os.name != "os2"
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def signal_alarm(n):
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"""Call signal.alarm when it exists (i.e. not on Windows)."""
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if hasattr(signal, 'alarm'):
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signal.alarm(n)
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# Remember real select() to avoid interferences with mocking
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_real_select = select.select
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def receive(sock, n, timeout=20):
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r, w, x = _real_select([sock], [], [], timeout)
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if sock in r:
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return sock.recv(n)
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else:
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raise RuntimeError, "timed out on %r" % (sock,)
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if HAVE_UNIX_SOCKETS:
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class ForkingUnixStreamServer(SocketServer.ForkingMixIn,
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SocketServer.UnixStreamServer):
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pass
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class ForkingUnixDatagramServer(SocketServer.ForkingMixIn,
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SocketServer.UnixDatagramServer):
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pass
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@contextlib.contextmanager
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def simple_subprocess(testcase):
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pid = os.fork()
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if pid == 0:
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# Don't raise an exception; it would be caught by the test harness.
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os._exit(72)
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yield None
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pid2, status = os.waitpid(pid, 0)
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testcase.assertEqual(pid2, pid)
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testcase.assertEqual(72 << 8, status)
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@unittest.skipUnless(threading, 'Threading required for this test.')
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class SocketServerTest(unittest.TestCase):
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"""Test all socket servers."""
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def setUp(self):
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signal_alarm(60) # Kill deadlocks after 60 seconds.
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self.port_seed = 0
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self.test_files = []
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def tearDown(self):
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signal_alarm(0) # Didn't deadlock.
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reap_children()
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for fn in self.test_files:
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try:
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os.remove(fn)
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except os.error:
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pass
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self.test_files[:] = []
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def pickaddr(self, proto):
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if proto == socket.AF_INET:
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return (HOST, 0)
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else:
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# XXX: We need a way to tell AF_UNIX to pick its own name
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# like AF_INET provides port==0.
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dir = None
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if os.name == 'os2':
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dir = '\socket'
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fn = tempfile.mktemp(prefix='unix_socket.', dir=dir)
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if os.name == 'os2':
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# AF_UNIX socket names on OS/2 require a specific prefix
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# which can't include a drive letter and must also use
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# backslashes as directory separators
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if fn[1] == ':':
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fn = fn[2:]
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if fn[0] in (os.sep, os.altsep):
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fn = fn[1:]
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if os.sep == '/':
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fn = fn.replace(os.sep, os.altsep)
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else:
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fn = fn.replace(os.altsep, os.sep)
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self.test_files.append(fn)
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return fn
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def make_server(self, addr, svrcls, hdlrbase):
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class MyServer(svrcls):
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def handle_error(self, request, client_address):
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self.close_request(request)
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self.server_close()
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raise
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class MyHandler(hdlrbase):
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def handle(self):
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line = self.rfile.readline()
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self.wfile.write(line)
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if verbose: print "creating server"
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server = MyServer(addr, MyHandler)
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self.assertEqual(server.server_address, server.socket.getsockname())
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return server
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@reap_threads
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def run_server(self, svrcls, hdlrbase, testfunc):
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server = self.make_server(self.pickaddr(svrcls.address_family),
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svrcls, hdlrbase)
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# We had the OS pick a port, so pull the real address out of
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# the server.
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addr = server.server_address
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if verbose:
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print "server created"
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print "ADDR =", addr
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print "CLASS =", svrcls
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t = threading.Thread(
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name='%s serving' % svrcls,
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target=server.serve_forever,
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# Short poll interval to make the test finish quickly.
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# Time between requests is short enough that we won't wake
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# up spuriously too many times.
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kwargs={'poll_interval':0.01})
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t.daemon = True # In case this function raises.
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t.start()
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if verbose: print "server running"
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for i in range(3):
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if verbose: print "test client", i
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testfunc(svrcls.address_family, addr)
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if verbose: print "waiting for server"
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server.shutdown()
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t.join()
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if verbose: print "done"
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def stream_examine(self, proto, addr):
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s = socket.socket(proto, socket.SOCK_STREAM)
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s.connect(addr)
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s.sendall(TEST_STR)
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buf = data = receive(s, 100)
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while data and '\n' not in buf:
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data = receive(s, 100)
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buf += data
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self.assertEqual(buf, TEST_STR)
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s.close()
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def dgram_examine(self, proto, addr):
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s = socket.socket(proto, socket.SOCK_DGRAM)
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s.sendto(TEST_STR, addr)
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buf = data = receive(s, 100)
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while data and '\n' not in buf:
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data = receive(s, 100)
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buf += data
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self.assertEqual(buf, TEST_STR)
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s.close()
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def test_TCPServer(self):
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self.run_server(SocketServer.TCPServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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def test_ThreadingTCPServer(self):
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self.run_server(SocketServer.ThreadingTCPServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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if HAVE_FORKING:
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def test_ForkingTCPServer(self):
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with simple_subprocess(self):
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self.run_server(SocketServer.ForkingTCPServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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if HAVE_UNIX_SOCKETS:
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def test_UnixStreamServer(self):
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self.run_server(SocketServer.UnixStreamServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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def test_ThreadingUnixStreamServer(self):
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self.run_server(SocketServer.ThreadingUnixStreamServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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if HAVE_FORKING:
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def test_ForkingUnixStreamServer(self):
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with simple_subprocess(self):
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self.run_server(ForkingUnixStreamServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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def test_UDPServer(self):
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self.run_server(SocketServer.UDPServer,
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SocketServer.DatagramRequestHandler,
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self.dgram_examine)
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def test_ThreadingUDPServer(self):
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self.run_server(SocketServer.ThreadingUDPServer,
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SocketServer.DatagramRequestHandler,
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self.dgram_examine)
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if HAVE_FORKING:
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def test_ForkingUDPServer(self):
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with simple_subprocess(self):
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self.run_server(SocketServer.ForkingUDPServer,
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SocketServer.DatagramRequestHandler,
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self.dgram_examine)
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@contextlib.contextmanager
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def mocked_select_module(self):
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"""Mocks the select.select() call to raise EINTR for first call"""
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old_select = select.select
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class MockSelect:
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def __init__(self):
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self.called = 0
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def __call__(self, *args):
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self.called += 1
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if self.called == 1:
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# raise the exception on first call
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raise select.error(errno.EINTR, os.strerror(errno.EINTR))
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else:
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# Return real select value for consecutive calls
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return old_select(*args)
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select.select = MockSelect()
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try:
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yield select.select
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finally:
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select.select = old_select
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def test_InterruptServerSelectCall(self):
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with self.mocked_select_module() as mock_select:
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pid = self.run_server(SocketServer.TCPServer,
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SocketServer.StreamRequestHandler,
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self.stream_examine)
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# Make sure select was called again:
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self.assertGreater(mock_select.called, 1)
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# Alas, on Linux (at least) recvfrom() doesn't return a meaningful
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# client address so this cannot work:
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# if HAVE_UNIX_SOCKETS:
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# def test_UnixDatagramServer(self):
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# self.run_server(SocketServer.UnixDatagramServer,
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# SocketServer.DatagramRequestHandler,
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# self.dgram_examine)
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#
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# def test_ThreadingUnixDatagramServer(self):
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# self.run_server(SocketServer.ThreadingUnixDatagramServer,
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# SocketServer.DatagramRequestHandler,
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# self.dgram_examine)
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#
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# if HAVE_FORKING:
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# def test_ForkingUnixDatagramServer(self):
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# self.run_server(SocketServer.ForkingUnixDatagramServer,
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# SocketServer.DatagramRequestHandler,
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# self.dgram_examine)
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@reap_threads
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def test_shutdown(self):
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# Issue #2302: shutdown() should always succeed in making an
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# other thread leave serve_forever().
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class MyServer(SocketServer.TCPServer):
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pass
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class MyHandler(SocketServer.StreamRequestHandler):
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pass
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threads = []
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for i in range(20):
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s = MyServer((HOST, 0), MyHandler)
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t = threading.Thread(
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name='MyServer serving',
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target=s.serve_forever,
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kwargs={'poll_interval':0.01})
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t.daemon = True # In case this function raises.
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threads.append((t, s))
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for t, s in threads:
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t.start()
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s.shutdown()
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for t, s in threads:
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t.join()
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def test_main():
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if imp.lock_held():
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# If the import lock is held, the threads will hang
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raise unittest.SkipTest("can't run when import lock is held")
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test.test_support.run_unittest(SocketServerTest)
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if __name__ == "__main__":
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test_main()
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