""" Test suite for socketserver. """ 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() self.assertEqual(-1, server.socket.fileno()) 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) class MiscTestCase(unittest.TestCase): def test_all(self): # objects defined in the module should be in __all__ expected = [] for name in dir(socketserver): if not name.startswith('_'): mod_object = getattr(socketserver, name) if getattr(mod_object, '__module__', None) == 'socketserver': expected.append(name) self.assertCountEqual(socketserver.__all__, expected) def test_shutdown_request_called_if_verify_request_false(self): # Issue #26309: BaseServer should call shutdown_request even if # verify_request is False class MyServer(socketserver.TCPServer): def verify_request(self, request, client_address): return False shutdown_called = 0 def shutdown_request(self, request): self.shutdown_called += 1 socketserver.TCPServer.shutdown_request(self, request) server = MyServer((HOST, 0), socketserver.StreamRequestHandler) s = socket.socket(server.address_family, socket.SOCK_STREAM) s.connect(server.server_address) s.close() server.handle_request() self.assertEqual(server.shutdown_called, 1) server.server_close() if __name__ == "__main__": unittest.main()