/usr/lib/python3/dist-packages/pyramid/scripts/pserve.py is in python3-pyramid 1.6+dfsg-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# (http://pythonpaste.org) Licensed under the MIT license:
# http://www.opensource.org/licenses/mit-license.php
#
# For discussion of daemonizing:
# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
#
# Code taken also from QP: http://www.mems-exchange.org/software/qp/ From
# lib/site.py
import atexit
import ctypes
import errno
import logging
import optparse
import os
import py_compile
import re
import subprocess
import sys
import tempfile
import textwrap
import threading
import time
import traceback
import webbrowser
from paste.deploy import loadserver
from paste.deploy import loadapp
from paste.deploy.loadwsgi import loadcontext, SERVER
from pyramid.compat import PY3
from pyramid.compat import WIN
from pyramid.paster import setup_logging
from pyramid.scripts.common import parse_vars
MAXFD = 1024
try:
import termios
except ImportError: # pragma: no cover
termios = None
if WIN and not hasattr(os, 'kill'): # pragma: no cover
# py 2.6 on windows
def kill(pid, sig=None):
"""kill function for Win32"""
# signal is ignored, semibogus raise message
kernel32 = ctypes.windll.kernel32
handle = kernel32.OpenProcess(1, 0, pid)
if (0 == kernel32.TerminateProcess(handle, 0)):
raise OSError('No such process %s' % pid)
else:
kill = os.kill
def main(argv=sys.argv, quiet=False):
command = PServeCommand(argv, quiet=quiet)
return command.run()
class DaemonizeException(Exception):
pass
class PServeCommand(object):
usage = '%prog config_uri [start|stop|restart|status] [var=value]'
description = """\
This command serves a web application that uses a PasteDeploy
configuration file for the server and application.
If start/stop/restart is given, then --daemon is implied, and it will
start (normal operation), stop (--stop-daemon), or do both.
Note: Daemonization features are deprecated.
You can also include variable assignments like 'http_port=8080'
and then use %(http_port)s in your config files.
"""
default_verbosity = 1
parser = optparse.OptionParser(
usage,
description=textwrap.dedent(description)
)
parser.add_option(
'-n', '--app-name',
dest='app_name',
metavar='NAME',
help="Load the named application (default main)")
parser.add_option(
'-s', '--server',
dest='server',
metavar='SERVER_TYPE',
help="Use the named server.")
parser.add_option(
'--server-name',
dest='server_name',
metavar='SECTION_NAME',
help=("Use the named server as defined in the configuration file "
"(default: main)"))
if hasattr(os, 'fork'):
parser.add_option(
'--daemon',
dest="daemon",
action="store_true",
help="Run in daemon (background) mode [DEPRECATED]")
parser.add_option(
'--pid-file',
dest='pid_file',
metavar='FILENAME',
help=("Save PID to file (default to pyramid.pid if running in "
"daemon mode) [DEPRECATED]"))
parser.add_option(
'--log-file',
dest='log_file',
metavar='LOG_FILE',
help="Save output to the given log file (redirects stdout)")
parser.add_option(
'--reload',
dest='reload',
action='store_true',
help="Use auto-restart file monitor")
parser.add_option(
'--reload-interval',
dest='reload_interval',
default=1,
help=("Seconds between checking files (low number can cause "
"significant CPU usage)"))
parser.add_option(
'--monitor-restart',
dest='monitor_restart',
action='store_true',
help="Auto-restart server if it dies [DEPRECATED]")
parser.add_option(
'-b', '--browser',
dest='browser',
action='store_true',
help="Open a web browser to server url")
parser.add_option(
'--status',
action='store_true',
dest='show_status',
help=("Show the status of the (presumably daemonized) server "
"[DEPRECATED]"))
parser.add_option(
'-v', '--verbose',
default=default_verbosity,
dest='verbose',
action='count',
help="Set verbose level (default "+str(default_verbosity)+")")
parser.add_option(
'-q', '--quiet',
action='store_const',
const=0,
dest='verbose',
help="Suppress verbose output")
if hasattr(os, 'setuid'):
# I don't think these are available on Windows
parser.add_option(
'--user',
dest='set_user',
metavar="USERNAME",
help="Set the user (usually only possible when run as root)")
parser.add_option(
'--group',
dest='set_group',
metavar="GROUP",
help="Set the group (usually only possible when run as root)")
parser.add_option(
'--stop-daemon',
dest='stop_daemon',
action='store_true',
help=('Stop a daemonized server (given a PID file, or default '
'pyramid.pid file) [DEPRECATED]'))
_scheme_re = re.compile(r'^[a-z][a-z]+:', re.I)
_reloader_environ_key = 'PYTHON_RELOADER_SHOULD_RUN'
_monitor_environ_key = 'PASTE_MONITOR_SHOULD_RUN'
possible_subcommands = ('start', 'stop', 'restart', 'status')
def __init__(self, argv, quiet=False):
self.options, self.args = self.parser.parse_args(argv[1:])
if quiet:
self.options.verbose = 0
def out(self, msg): # pragma: no cover
if self.options.verbose > 0:
print(msg)
def get_options(self):
if (len(self.args) > 1
and self.args[1] in self.possible_subcommands):
restvars = self.args[2:]
else:
restvars = self.args[1:]
return parse_vars(restvars)
def run(self): # pragma: no cover
if self.options.stop_daemon:
self._warn_daemon_deprecated()
return self.stop_daemon()
if not hasattr(self.options, 'set_user'):
# Windows case:
self.options.set_user = self.options.set_group = None
# @@: Is this the right stage to set the user at?
if self.options.set_user or self.options.set_group:
self.change_user_group(
self.options.set_user, self.options.set_group)
if not self.args:
self.out('You must give a config file')
return 2
app_spec = self.args[0]
if (len(self.args) > 1
and self.args[1] in self.possible_subcommands):
cmd = self.args[1]
else:
cmd = None
if self.options.reload:
if (
getattr(self.options, 'daemon', False) or
cmd in ('start', 'stop', 'restart')
):
self.out(
'Error: Cannot use reloading while running as a dameon.')
return 2
if os.environ.get(self._reloader_environ_key):
if self.options.verbose > 1:
self.out('Running reloading file monitor')
install_reloader(int(self.options.reload_interval), [app_spec])
# if self.requires_config_file:
# watch_file(self.args[0])
else:
return self.restart_with_reloader()
if cmd not in (None, 'start', 'stop', 'restart', 'status'):
self.out(
'Error: must give start|stop|restart (not %s)' % cmd)
return 2
if cmd == 'status' or self.options.show_status:
self._warn_daemon_deprecated()
return self.show_status()
if cmd == 'restart' or cmd == 'stop':
self._warn_daemon_deprecated()
result = self.stop_daemon()
if result:
if cmd == 'restart':
self.out("Could not stop daemon; aborting")
else:
self.out("Could not stop daemon")
return result
if cmd == 'stop':
return result
self.options.daemon = True
if cmd == 'start':
self.options.daemon = True
app_name = self.options.app_name
vars = self.get_options()
if not self._scheme_re.search(app_spec):
app_spec = 'config:' + app_spec
server_name = self.options.server_name
if self.options.server:
server_spec = 'egg:pyramid'
assert server_name is None
server_name = self.options.server
else:
server_spec = app_spec
base = os.getcwd()
# warn before setting a default
if self.options.pid_file:
self._warn_daemon_deprecated()
if getattr(self.options, 'daemon', False):
if not self.options.pid_file:
self.options.pid_file = 'pyramid.pid'
if not self.options.log_file:
self.options.log_file = 'pyramid.log'
# Ensure the log file is writeable
if self.options.log_file:
try:
writeable_log_file = open(self.options.log_file, 'a')
except IOError as ioe:
msg = 'Error: Unable to write to log file: %s' % ioe
raise ValueError(msg)
writeable_log_file.close()
# Ensure the pid file is writeable
if self.options.pid_file:
try:
writeable_pid_file = open(self.options.pid_file, 'a')
except IOError as ioe:
msg = 'Error: Unable to write to pid file: %s' % ioe
raise ValueError(msg)
writeable_pid_file.close()
# warn before forking
if (
self.options.monitor_restart and
not os.environ.get(self._monitor_environ_key)
):
self.out('''\
--monitor-restart has been deprecated in Pyramid 1.6. It will be removed
in a future release per Pyramid's deprecation policy. Please consider using
a real process manager for your processes like Systemd, Circus, or Supervisor.
''')
if (
getattr(self.options, 'daemon', False) and
not os.environ.get(self._monitor_environ_key)
):
self._warn_daemon_deprecated()
try:
self.daemonize()
except DaemonizeException as ex:
if self.options.verbose > 0:
self.out(str(ex))
return 2
if (
not os.environ.get(self._monitor_environ_key) and
self.options.pid_file
):
self.record_pid(self.options.pid_file)
if (
self.options.monitor_restart and
not os.environ.get(self._monitor_environ_key)
):
return self.restart_with_monitor()
if self.options.log_file:
stdout_log = LazyWriter(self.options.log_file, 'a')
sys.stdout = stdout_log
sys.stderr = stdout_log
logging.basicConfig(stream=stdout_log)
log_fn = app_spec
if log_fn.startswith('config:'):
log_fn = app_spec[len('config:'):]
elif log_fn.startswith('egg:'):
log_fn = None
if log_fn:
log_fn = os.path.join(base, log_fn)
setup_logging(log_fn)
server = self.loadserver(server_spec, name=server_name,
relative_to=base, global_conf=vars)
app = self.loadapp(app_spec, name=app_name, relative_to=base,
global_conf=vars)
if self.options.verbose > 0:
if hasattr(os, 'getpid'):
msg = 'Starting server in PID %i.' % os.getpid()
else:
msg = 'Starting server.'
self.out(msg)
def serve():
try:
server(app)
except (SystemExit, KeyboardInterrupt) as e:
if self.options.verbose > 1:
raise
if str(e):
msg = ' ' + str(e)
else:
msg = ''
self.out('Exiting%s (-v to see traceback)' % msg)
if self.options.browser:
def open_browser():
context = loadcontext(SERVER, app_spec, name=app_name, relative_to=base,
global_conf=vars)
url = 'http://127.0.0.1:{port}/'.format(**context.config())
time.sleep(1)
webbrowser.open(url)
t = threading.Thread(target=open_browser)
t.setDaemon(True)
t.start()
serve()
def loadapp(self, app_spec, name, relative_to, **kw): # pragma: no cover
return loadapp(app_spec, name=name, relative_to=relative_to, **kw)
def loadserver(self, server_spec, name, relative_to, **kw):# pragma:no cover
return loadserver(
server_spec, name=name, relative_to=relative_to, **kw)
def quote_first_command_arg(self, arg): # pragma: no cover
"""
There's a bug in Windows when running an executable that's
located inside a path with a space in it. This method handles
that case, or on non-Windows systems or an executable with no
spaces, it just leaves well enough alone.
"""
if (sys.platform != 'win32' or ' ' not in arg):
# Problem does not apply:
return arg
try:
import win32api
except ImportError:
raise ValueError(
"The executable %r contains a space, and in order to "
"handle this issue you must have the win32api module "
"installed" % arg)
arg = win32api.GetShortPathName(arg)
return arg
def find_script_path(self, name): # pragma: no cover
"""
Return the path to the script being invoked by the python interpreter.
There's an issue on Windows when running the executable from
a console_script causing the script name (sys.argv[0]) to
not end with .exe or .py and thus cannot be run via popen.
"""
if sys.platform == 'win32':
if not name.endswith('.exe') and not name.endswith('.py'):
name += '.exe'
return name
def daemonize(self): # pragma: no cover
pid = live_pidfile(self.options.pid_file)
if pid:
raise DaemonizeException(
"Daemon is already running (PID: %s from PID file %s)"
% (pid, self.options.pid_file))
if self.options.verbose > 0:
self.out('Entering daemon mode')
pid = os.fork()
if pid:
# The forked process also has a handle on resources, so we
# *don't* want proper termination of the process, we just
# want to exit quick (which os._exit() does)
os._exit(0)
# Make this the session leader
os.setsid()
# Fork again for good measure!
pid = os.fork()
if pid:
os._exit(0)
# @@: Should we set the umask and cwd now?
import resource # Resource usage information.
maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
if (maxfd == resource.RLIM_INFINITY):
maxfd = MAXFD
# Iterate through and close all file descriptors.
for fd in range(0, maxfd):
try:
os.close(fd)
except OSError: # ERROR, fd wasn't open to begin with (ignored)
pass
if (hasattr(os, "devnull")):
REDIRECT_TO = os.devnull
else:
REDIRECT_TO = "/dev/null"
os.open(REDIRECT_TO, os.O_RDWR) # standard input (0)
# Duplicate standard input to standard output and standard error.
os.dup2(0, 1) # standard output (1)
os.dup2(0, 2) # standard error (2)
def _remove_pid_file(self, written_pid, filename, verbosity):
current_pid = os.getpid()
if written_pid != current_pid:
# A forked process must be exiting, not the process that
# wrote the PID file
return
if not os.path.exists(filename):
return
with open(filename) as f:
content = f.read().strip()
try:
pid_in_file = int(content)
except ValueError:
pass
else:
if pid_in_file != current_pid:
msg = "PID file %s contains %s, not expected PID %s"
self.out(msg % (filename, pid_in_file, current_pid))
return
if verbosity > 0:
self.out("Removing PID file %s" % filename)
try:
os.unlink(filename)
return
except OSError as e:
# Record, but don't give traceback
self.out("Cannot remove PID file: (%s)" % e)
# well, at least lets not leave the invalid PID around...
try:
with open(filename, 'w') as f:
f.write('')
except OSError as e:
self.out('Stale PID left in file: %s (%s)' % (filename, e))
else:
self.out('Stale PID removed')
def record_pid(self, pid_file):
pid = os.getpid()
if self.options.verbose > 1:
self.out('Writing PID %s to %s' % (pid, pid_file))
with open(pid_file, 'w') as f:
f.write(str(pid))
atexit.register(self._remove_pid_file, pid, pid_file, self.options.verbose)
def stop_daemon(self): # pragma: no cover
pid_file = self.options.pid_file or 'pyramid.pid'
if not os.path.exists(pid_file):
self.out('No PID file exists in %s' % pid_file)
return 1
pid = read_pidfile(pid_file)
if not pid:
self.out("Not a valid PID file in %s" % pid_file)
return 1
pid = live_pidfile(pid_file)
if not pid:
self.out("PID in %s is not valid (deleting)" % pid_file)
try:
os.unlink(pid_file)
except (OSError, IOError) as e:
self.out("Could not delete: %s" % e)
return 2
return 1
for j in range(10):
if not live_pidfile(pid_file):
break
import signal
kill(pid, signal.SIGTERM)
time.sleep(1)
else:
self.out("failed to kill web process %s" % pid)
return 3
if os.path.exists(pid_file):
os.unlink(pid_file)
return 0
def show_status(self): # pragma: no cover
pid_file = self.options.pid_file or 'pyramid.pid'
if not os.path.exists(pid_file):
self.out('No PID file %s' % pid_file)
return 1
pid = read_pidfile(pid_file)
if not pid:
self.out('No PID in file %s' % pid_file)
return 1
pid = live_pidfile(pid_file)
if not pid:
self.out('PID %s in %s is not running' % (pid, pid_file))
return 1
self.out('Server running in PID %s' % pid)
return 0
def restart_with_reloader(self): # pragma: no cover
self.restart_with_monitor(reloader=True)
def restart_with_monitor(self, reloader=False): # pragma: no cover
if self.options.verbose > 0:
if reloader:
self.out('Starting subprocess with file monitor')
else:
self.out('Starting subprocess with monitor parent')
while 1:
args = [
self.quote_first_command_arg(sys.executable),
self.find_script_path(sys.argv[0]),
] + sys.argv[1:]
new_environ = os.environ.copy()
if reloader:
new_environ[self._reloader_environ_key] = 'true'
else:
new_environ[self._monitor_environ_key] = 'true'
proc = None
try:
try:
_turn_sigterm_into_systemexit()
proc = subprocess.Popen(args, env=new_environ)
exit_code = proc.wait()
proc = None
except KeyboardInterrupt:
self.out('^C caught in monitor process')
if self.options.verbose > 1:
raise
return 1
finally:
if proc is not None:
import signal
try:
kill(proc.pid, signal.SIGTERM)
except (OSError, IOError):
pass
if reloader:
# Reloader always exits with code 3; but if we are
# a monitor, any exit code will restart
if exit_code != 3:
return exit_code
if self.options.verbose > 0:
self.out('%s %s %s' % ('-' * 20, 'Restarting', '-' * 20))
def change_user_group(self, user, group): # pragma: no cover
import pwd
import grp
self.out('''\
The --user and --group options have been deprecated in Pyramid 1.6. They will
be removed in a future release per Pyramid's deprecation policy. Please
consider using a real process manager for your processes like Systemd, Circus,
or Supervisor, all of which support process security.
''')
uid = gid = None
if group:
try:
gid = int(group)
group = grp.getgrgid(gid).gr_name
except ValueError:
import grp
try:
entry = grp.getgrnam(group)
except KeyError:
raise ValueError(
"Bad group: %r; no such group exists" % group)
gid = entry.gr_gid
try:
uid = int(user)
user = pwd.getpwuid(uid).pw_name
except ValueError:
try:
entry = pwd.getpwnam(user)
except KeyError:
raise ValueError(
"Bad username: %r; no such user exists" % user)
if not gid:
gid = entry.pw_gid
uid = entry.pw_uid
if self.options.verbose > 0:
self.out('Changing user to %s:%s (%s:%s)' % (
user, group or '(unknown)', uid, gid))
if gid:
os.setgid(gid)
if uid:
os.setuid(uid)
def _warn_daemon_deprecated(self):
self.out('''\
The daemon options have been deprecated in Pyramid 1.6. They will be removed
in a future release per Pyramid's deprecation policy. Please consider using
a real process manager for your processes like Systemd, Circus, or Supervisor.
The following commands are deprecated:
[start,stop,restart,status] --daemon, --stop-server, --status, --pid-file
''')
class LazyWriter(object):
"""
File-like object that opens a file lazily when it is first written
to.
"""
def __init__(self, filename, mode='w'):
self.filename = filename
self.fileobj = None
self.lock = threading.Lock()
self.mode = mode
def open(self):
if self.fileobj is None:
with self.lock:
self.fileobj = open(self.filename, self.mode)
return self.fileobj
def close(self):
fileobj = self.fileobj
if fileobj is not None:
fileobj.close()
def __del__(self):
self.close()
def write(self, text):
fileobj = self.open()
fileobj.write(text)
fileobj.flush()
def writelines(self, text):
fileobj = self.open()
fileobj.writelines(text)
fileobj.flush()
def flush(self):
self.open().flush()
def live_pidfile(pidfile): # pragma: no cover
"""(pidfile:str) -> int | None
Returns an int found in the named file, if there is one,
and if there is a running process with that process id.
Return None if no such process exists.
"""
pid = read_pidfile(pidfile)
if pid:
try:
kill(int(pid), 0)
return pid
except OSError as e:
if e.errno == errno.EPERM:
return pid
return None
def read_pidfile(filename):
if os.path.exists(filename):
try:
with open(filename) as f:
content = f.read()
return int(content.strip())
except (ValueError, IOError):
return None
else:
return None
def ensure_port_cleanup(
bound_addresses, maxtries=30, sleeptime=2): # pragma: no cover
"""
This makes sure any open ports are closed.
Does this by connecting to them until they give connection
refused. Servers should call like::
ensure_port_cleanup([80, 443])
"""
atexit.register(_cleanup_ports, bound_addresses, maxtries=maxtries,
sleeptime=sleeptime)
def _cleanup_ports(
bound_addresses, maxtries=30, sleeptime=2): # pragma: no cover
# Wait for the server to bind to the port.
import socket
import errno
for bound_address in bound_addresses:
for attempt in range(maxtries):
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
sock.connect(bound_address)
except socket.error as e:
if e.args[0] != errno.ECONNREFUSED:
raise
break
else:
time.sleep(sleeptime)
else:
raise SystemExit('Timeout waiting for port.')
sock.close()
def _turn_sigterm_into_systemexit(): # pragma: no cover
"""
Attempts to turn a SIGTERM exception into a SystemExit exception.
"""
try:
import signal
except ImportError:
return
def handle_term(signo, frame):
raise SystemExit
signal.signal(signal.SIGTERM, handle_term)
def ensure_echo_on(): # pragma: no cover
if termios:
fd = sys.stdin
if fd.isatty():
attr_list = termios.tcgetattr(fd)
if not attr_list[3] & termios.ECHO:
attr_list[3] |= termios.ECHO
termios.tcsetattr(fd, termios.TCSANOW, attr_list)
def install_reloader(poll_interval=1, extra_files=None): # pragma: no cover
"""
Install the reloading monitor.
On some platforms server threads may not terminate when the main
thread does, causing ports to remain open/locked.
"""
ensure_echo_on()
mon = Monitor(poll_interval=poll_interval)
if extra_files is None:
extra_files = []
mon.extra_files.extend(extra_files)
t = threading.Thread(target=mon.periodic_reload)
t.setDaemon(True)
t.start()
class classinstancemethod(object):
"""
Acts like a class method when called from a class, like an
instance method when called by an instance. The method should
take two arguments, 'self' and 'cls'; one of these will be None
depending on how the method was called.
"""
def __init__(self, func):
self.func = func
self.__doc__ = func.__doc__
def __get__(self, obj, type=None):
return _methodwrapper(self.func, obj=obj, type=type)
class _methodwrapper(object):
def __init__(self, func, obj, type):
self.func = func
self.obj = obj
self.type = type
def __call__(self, *args, **kw):
assert not 'self' in kw and not 'cls' in kw, (
"You cannot use 'self' or 'cls' arguments to a "
"classinstancemethod")
return self.func(*((self.obj, self.type) + args), **kw)
class Monitor(object): # pragma: no cover
"""
A file monitor and server restarter.
Use this like:
..code-block:: Python
install_reloader()
Then make sure your server is installed with a shell script like::
err=3
while test "$err" -eq 3 ; do
python server.py
err="$?"
done
or is run from this .bat file (if you use Windows)::
@echo off
:repeat
python server.py
if %errorlevel% == 3 goto repeat
or run a monitoring process in Python (``pserve --reload`` does
this).
Use the ``watch_file(filename)`` function to cause a reload/restart for
other non-Python files (e.g., configuration files). If you have
a dynamic set of files that grows over time you can use something like::
def watch_config_files():
return CONFIG_FILE_CACHE.keys()
add_file_callback(watch_config_files)
Then every time the reloader polls files it will call
``watch_config_files`` and check all the filenames it returns.
"""
instances = []
global_extra_files = []
global_file_callbacks = []
def __init__(self, poll_interval):
self.module_mtimes = {}
self.keep_running = True
self.poll_interval = poll_interval
self.extra_files = list(self.global_extra_files)
self.instances.append(self)
self.syntax_error_files = set()
self.pending_reload = False
self.file_callbacks = list(self.global_file_callbacks)
temp_pyc_fp = tempfile.NamedTemporaryFile(delete=False)
self.temp_pyc = temp_pyc_fp.name
temp_pyc_fp.close()
def _exit(self):
try:
os.unlink(self.temp_pyc)
except IOError:
# not worried if the tempfile can't be removed
pass
# use os._exit() here and not sys.exit() since within a
# thread sys.exit() just closes the given thread and
# won't kill the process; note os._exit does not call
# any atexit callbacks, nor does it do finally blocks,
# flush open files, etc. In otherwords, it is rude.
os._exit(3)
def periodic_reload(self):
while True:
if not self.check_reload():
self._exit()
break
time.sleep(self.poll_interval)
def check_reload(self):
filenames = list(self.extra_files)
for file_callback in self.file_callbacks:
try:
filenames.extend(file_callback())
except:
print(
"Error calling reloader callback %r:" % file_callback)
traceback.print_exc()
for module in list(sys.modules.values()):
try:
filename = module.__file__
except (AttributeError, ImportError):
continue
if filename is not None:
filenames.append(filename)
new_changes = False
for filename in filenames:
try:
stat = os.stat(filename)
if stat:
mtime = stat.st_mtime
else:
mtime = 0
except (OSError, IOError):
continue
if filename.endswith('.pyc') and os.path.exists(filename[:-1]):
mtime = max(os.stat(filename[:-1]).st_mtime, mtime)
pyc = True
else:
pyc = False
old_mtime = self.module_mtimes.get(filename)
self.module_mtimes[filename] = mtime
if old_mtime is not None and old_mtime < mtime:
new_changes = True
if pyc:
filename = filename[:-1]
is_valid = True
if filename.endswith('.py'):
is_valid = self.check_syntax(filename)
if is_valid:
print("%s changed ..." % filename)
if new_changes:
self.pending_reload = True
if self.syntax_error_files:
for filename in sorted(self.syntax_error_files):
print("%s has a SyntaxError; NOT reloading." % filename)
if self.pending_reload and not self.syntax_error_files:
self.pending_reload = False
return False
return True
def check_syntax(self, filename):
# check if a file has syntax errors.
# If so, track it until it's fixed.
try:
py_compile.compile(filename, cfile=self.temp_pyc, doraise=True)
except py_compile.PyCompileError as ex:
print(ex.msg)
self.syntax_error_files.add(filename)
return False
else:
if filename in self.syntax_error_files:
self.syntax_error_files.remove(filename)
return True
def watch_file(self, cls, filename):
"""Watch the named file for changes"""
filename = os.path.abspath(filename)
if self is None:
for instance in cls.instances:
instance.watch_file(filename)
cls.global_extra_files.append(filename)
else:
self.extra_files.append(filename)
watch_file = classinstancemethod(watch_file)
def add_file_callback(self, cls, callback):
"""Add a callback -- a function that takes no parameters -- that will
return a list of filenames to watch for changes."""
if self is None:
for instance in cls.instances:
instance.add_file_callback(callback)
cls.global_file_callbacks.append(callback)
else:
self.file_callbacks.append(callback)
add_file_callback = classinstancemethod(add_file_callback)
watch_file = Monitor.watch_file
add_file_callback = Monitor.add_file_callback
# For paste.deploy server instantiation (egg:pyramid#wsgiref)
def wsgiref_server_runner(wsgi_app, global_conf, **kw): # pragma: no cover
from wsgiref.simple_server import make_server
host = kw.get('host', '0.0.0.0')
port = int(kw.get('port', 8080))
server = make_server(host, port, wsgi_app)
print('Starting HTTP server on http://%s:%s' % (host, port))
server.serve_forever()
# For paste.deploy server instantiation (egg:pyramid#cherrypy)
def cherrypy_server_runner(
app, global_conf=None, host='127.0.0.1', port=None,
ssl_pem=None, protocol_version=None, numthreads=None,
server_name=None, max=None, request_queue_size=None,
timeout=None
): # pragma: no cover
"""
Entry point for CherryPy's WSGI server
Serves the specified WSGI app via CherryPyWSGIServer.
``app``
The WSGI 'application callable'; multiple WSGI applications
may be passed as (script_name, callable) pairs.
``host``
This is the ipaddress to bind to (or a hostname if your
nameserver is properly configured). This defaults to
127.0.0.1, which is not a public interface.
``port``
The port to run on, defaults to 8080 for HTTP, or 4443 for
HTTPS. This can be a string or an integer value.
``ssl_pem``
This an optional SSL certificate file (via OpenSSL) You can
generate a self-signed test PEM certificate file as follows:
$ openssl genrsa 1024 > host.key
$ chmod 400 host.key
$ openssl req -new -x509 -nodes -sha1 -days 365 \\
-key host.key > host.cert
$ cat host.cert host.key > host.pem
$ chmod 400 host.pem
``protocol_version``
The protocol used by the server, by default ``HTTP/1.1``.
``numthreads``
The number of worker threads to create.
``server_name``
The string to set for WSGI's SERVER_NAME environ entry.
``max``
The maximum number of queued requests. (defaults to -1 = no
limit).
``request_queue_size``
The 'backlog' argument to socket.listen(); specifies the
maximum number of queued connections.
``timeout``
The timeout in seconds for accepted connections.
"""
is_ssl = False
if ssl_pem:
port = port or 4443
is_ssl = True
if not port:
if ':' in host:
host, port = host.split(':', 1)
else:
port = 8080
bind_addr = (host, int(port))
kwargs = {}
for var_name in ('numthreads', 'max', 'request_queue_size', 'timeout'):
var = locals()[var_name]
if var is not None:
kwargs[var_name] = int(var)
from cherrypy import wsgiserver
server = wsgiserver.CherryPyWSGIServer(bind_addr, app,
server_name=server_name, **kwargs)
if ssl_pem is not None:
if not PY3:
server.ssl_certificate = server.ssl_private_key = ssl_pem
else:
# creates wsgiserver.ssl_builtin as side-effect
wsgiserver.get_ssl_adapter_class()
server.ssl_adapter = wsgiserver.ssl_builtin.BuiltinSSLAdapter(
ssl_pem, ssl_pem)
if protocol_version:
server.protocol = protocol_version
try:
protocol = is_ssl and 'https' or 'http'
if host == '0.0.0.0':
print('serving on 0.0.0.0:%s view at %s://127.0.0.1:%s' %
(port, protocol, port))
else:
print('serving on %s://%s:%s' % (protocol, host, port))
server.start()
except (KeyboardInterrupt, SystemExit):
server.stop()
return server
if __name__ == '__main__': # pragma: no cover
sys.exit(main() or 0)
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