def _check_file(modify_times, path):
try:
modified = os.stat(path).st_mtime
except Exception:
return
if path not in modify_times:
modify_times[path] = modified
return
if modify_times[path] != modified:
gen_log.info("%s modified; restarting server", path)
_reload()
def _on_headers(self, data):
try:
data = native_str(data.decode('latin1'))
eol = data.find("\r\n")
start_line = data[:eol]
try:
method, uri, version = start_line.split(" ")
except ValueError:
raise _BadRequestException("Malformed HTTP request line")
if not version.startswith("HTTP/"):
raise _BadRequestException("Malformed HTTP version in HTTP Request-Line")
try:
headers = httputil.HTTPHeaders.parse(data[eol:])
except ValueError:
# Probably from split() if there was no ':' in the line
raise _BadRequestException("Malformed HTTP headers")
# HTTPRequest wants an IP, not a full socket address
if self.address_family in (socket.AF_INET, socket.AF_INET6):
remote_ip = self.address[0]
else:
# Unix (or other) socket; fake the remote address
remote_ip = '0.0.0.0'
self._request = HTTPRequest(
connection=self, method=method, uri=uri, version=version,
headers=headers, remote_ip=remote_ip, protocol=self.protocol)
content_length = headers.get("Content-Length")
if content_length:
content_length = int(content_length)
if content_length > self.stream.max_buffer_size:
raise _BadRequestException("Content-Length too long")
if headers.get("Expect") == "100-continue":
self.stream.write(b"HTTP/1.1 100 (Continue)\r\n\r\n")
self.stream.read_bytes(content_length, self._on_request_body)
return
self.request_callback(self._request)
except _BadRequestException as e:
gen_log.info("Malformed HTTP request from %r: %s",
self.address, e)
self.close()
return
def run(self, result=None):
logger = logging.getLogger()
if not logger.handlers:
logging.basicConfig()
handler = logger.handlers[0]
if (len(logger.handlers) > 1 or
not isinstance(handler, logging.StreamHandler)):
# Logging has been configured in a way we don't recognize,
# so just leave it alone.
super(LogTrapTestCase, self).run(result)
return
old_stream = handler.stream
try:
handler.stream = StringIO()
gen_log.info("RUNNING TEST: " + str(self))
old_error_count = len(result.failures) + len(result.errors)
super(LogTrapTestCase, self).run(result)
new_error_count = len(result.failures) + len(result.errors)
if new_error_count != old_error_count:
old_stream.write(handler.stream.getvalue())
finally:
handler.stream = old_stream
def fork_processes(num_processes, max_restarts=100):
"""Starts multiple worker processes.
If ``num_processes`` is None or <= 0, we detect the number of cores
available on this machine and fork that number of child
processes. If ``num_processes`` is given and > 0, we fork that
specific number of sub-processes.
Since we use processes and not threads, there is no shared memory
between any server code.
Note that multiple processes are not compatible with the autoreload
module (or the ``autoreload=True`` option to `webalchemy.tornado.web.Application`
which defaults to True when ``debug=True``).
When using multiple processes, no IOLoops can be created or
referenced until after the call to ``fork_processes``.
In each child process, ``fork_processes`` returns its *task id*, a
number between 0 and ``num_processes``. Processes that exit
abnormally (due to a signal or non-zero exit status) are restarted
with the same id (up to ``max_restarts`` times). In the parent
process, ``fork_processes`` returns None if all child processes
have exited normally, but will otherwise only exit by throwing an
exception.
"""
global _task_id
assert _task_id is None
if num_processes is None or num_processes <= 0:
num_processes = cpu_count()
if ioloop.IOLoop.initialized():
raise RuntimeError("Cannot run in multiple processes: IOLoop instance "
"has already been initialized. You cannot call "
"IOLoop.instance() before calling start_processes()")
gen_log.info("Starting %d processes", num_processes)
children = {}
def start_child(i):
pid = os.fork()
if pid == 0:
# child process
_reseed_random()
global _task_id
_task_id = i
return i
else:
children[pid] = i
return None
for i in range(num_processes):
id = start_child(i)
if id is not None:
return id
num_restarts = 0
while children:
try:
pid, status = os.wait()
except OSError as e:
if e.errno == errno.EINTR:
continue
raise
if pid not in children:
continue
id = children.pop(pid)
if os.WIFSIGNALED(status):
gen_log.warning("child %d (pid %d) killed by signal %d, restarting",
id, pid, os.WTERMSIG(status))
elif os.WEXITSTATUS(status) != 0:
gen_log.warning("child %d (pid %d) exited with status %d, restarting",
id, pid, os.WEXITSTATUS(status))
else:
gen_log.info("child %d (pid %d) exited normally", id, pid)
continue
num_restarts += 1
if num_restarts > max_restarts:
raise RuntimeError("Too many child restarts, giving up")
new_id = start_child(id)
if new_id is not None:
return new_id
# All child processes exited cleanly, so exit the master process
# instead of just returning to right after the call to
# fork_processes (which will probably just start up another IOLoop
# unless the caller checks the return value).
sys.exit(0)
def main(**kwargs):
"""A simple test runner.
This test runner is essentially equivalent to `unittest.main` from
the standard library, but adds support for webalchemy.tornado-style option
parsing and log formatting.
The easiest way to run a test is via the command line::
python -m webalchemy.tornado.testing webalchemy.tornado.test.stack_context_test
See the standard library unittest module for ways in which tests can
be specified.
Projects with many tests may wish to define a test script like
``webalchemy.tornado/test/runtests.py``. This script should define a method
``all()`` which returns a test suite and then call
`webalchemy.tornado.testing.main()`. Note that even when a test script is
used, the ``all()`` test suite may be overridden by naming a
single test on the command line::
# Runs all tests
python -m webalchemy.tornado.test.runtests
# Runs one test
python -m webalchemy.tornado.test.runtests webalchemy.tornado.test.stack_context_test
Additional keyword arguments passed through to ``unittest.main()``.
For example, use ``webalchemy.tornado.testing.main(verbosity=2)``
to show many test details as they are run.
See http://docs.python.org/library/unittest.html#unittest.main
for full argument list.
"""
from webalchemy.tornado.options import define, options, parse_command_line
define('exception_on_interrupt', type=bool, default=True,
help=("If true (default), ctrl-c raises a KeyboardInterrupt "
"exception. This prints a stack trace but cannot interrupt "
"certain operations. If false, the process is more reliably "
"killed, but does not print a stack trace."))
# support the same options as unittest's command-line interface
define('verbose', type=bool)
define('quiet', type=bool)
define('failfast', type=bool)
define('catch', type=bool)
define('buffer', type=bool)
argv = [sys.argv[0]] + parse_command_line(sys.argv)
if not options.exception_on_interrupt:
signal.signal(signal.SIGINT, signal.SIG_DFL)
if options.verbose is not None:
kwargs['verbosity'] = 2
if options.quiet is not None:
kwargs['verbosity'] = 0
if options.failfast is not None:
kwargs['failfast'] = True
if options.catch is not None:
kwargs['catchbreak'] = True
if options.buffer is not None:
kwargs['buffer'] = True
if __name__ == '__main__' and len(argv) == 1:
print("No tests specified", file=sys.stderr)
sys.exit(1)
try:
# In order to be able to run tests by their fully-qualified name
# on the command line without importing all tests here,
# module must be set to None. Python 3.2's unittest.main ignores
# defaultTest if no module is given (it tries to do its own
# test discovery, which is incompatible with auto2to3), so don't
# set module if we're not asking for a specific test.
if len(argv) > 1:
unittest.main(module=None, argv=argv, **kwargs)
else:
unittest.main(defaultTest="all", argv=argv, **kwargs)
except SystemExit as e:
if e.code == 0:
gen_log.info('PASS')
else:
gen_log.error('FAIL')
raise
def main():
"""Command-line wrapper to re-run a script whenever its source changes.
Scripts may be specified by filename or module name::
python -m webalchemy.tornado.autoreload -m webalchemy.tornado.test.runtests
python -m webalchemy.tornado.autoreload webalchemy.tornado/test/runtests.py
Running a script with this wrapper is similar to calling
`webalchemy.tornado.autoreload.wait` at the end of the script, but this wrapper
can catch import-time problems like syntax errors that would otherwise
prevent the script from reaching its call to `wait`.
"""
original_argv = sys.argv
sys.argv = sys.argv[:]
if len(sys.argv) >= 3 and sys.argv[1] == "-m":
mode = "module"
module = sys.argv[2]
del sys.argv[1:3]
elif len(sys.argv) >= 2:
mode = "script"
script = sys.argv[1]
sys.argv = sys.argv[1:]
else:
print(_USAGE, file=sys.stderr)
sys.exit(1)
try:
if mode == "module":
import runpy
runpy.run_module(module, run_name="__main__", alter_sys=True)
elif mode == "script":
with open(script) as f:
global __file__
__file__ = script
# Use globals as our "locals" dictionary so that
# something that tries to import __main__ (e.g. the unittest
# module) will see the right things.
exec_in(f.read(), globals(), globals())
except SystemExit as e:
logging.basicConfig()
gen_log.info("Script exited with status %s", e.code)
except Exception as e:
logging.basicConfig()
gen_log.warning("Script exited with uncaught exception", exc_info=True)
# If an exception occurred at import time, the file with the error
# never made it into sys.modules and so we won't know to watch it.
# Just to make sure we've covered everything, walk the stack trace
# from the exception and watch every file.
for (filename, lineno, name, line) in traceback.extract_tb(sys.exc_info()[2]):
watch(filename)
if isinstance(e, SyntaxError):
# SyntaxErrors are special: their innermost stack frame is fake
# so extract_tb won't see it and we have to get the filename
# from the exception object.
watch(e.filename)
else:
logging.basicConfig()
gen_log.info("Script exited normally")
# restore sys.argv so subsequent executions will include autoreload
sys.argv = original_argv
if mode == 'module':
# runpy did a fake import of the module as __main__, but now it's
# no longer in sys.modules. Figure out where it is and watch it.
loader = pkgutil.get_loader(module)
if loader is not None:
watch(loader.get_filename())
wait()
