/usr/lib/python2.7/dist-packages/cherrypy/_cpengine.py is in python-cherrypy 2.3.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | """Create and manage the CherryPy application server engine."""
import cgi
import signal
import sys
import threading
import time
import warnings
import cherrypy
from cherrypy import _cphttptools, filters
from cherrypy.lib import autoreload, cptools
# Use a flag to indicate the state of the application server.
STOPPED = 0
STARTING = None
STARTED = 1
try:
if hasattr(signal, "SIGTERM"):
def SIGTERM(signum=None, frame=None):
cherrypy.server.stop()
cherrypy.engine.stop()
signal.signal(signal.SIGTERM, SIGTERM)
except ValueError, _signal_exc:
if _signal_exc.args[0] != "signal only works in main thread":
raise
class Engine(object):
"""The application server engine, connecting HTTP servers to Requests."""
request_class = _cphttptools.Request
response_class = _cphttptools.Response
def __init__(self):
self.state = STOPPED
self.seen_threads = {}
self.interrupt = None
# Startup/shutdown hooks
self.on_start_server_list = []
self.on_stop_server_list = []
self.on_start_thread_list = []
self.on_stop_thread_list = []
def setup(self):
# The only reason this method isn't in __init__ is so that
# "import cherrypy" can create an Engine() without a circular ref.
conf = cherrypy.config.get
# Output config options to log
if conf("server.log_config_options", True):
cherrypy.config.outputConfigMap()
# Hmmm...we *could* check config in _start instead, but I think
# most people would like CP to fail before autoreload kicks in.
err = cherrypy.WrongConfigValue
for name, section in cherrypy.config.configs.iteritems():
for k, v in section.iteritems():
if k == "server.environment":
if v and v not in cherrypy.config.environments:
raise err("'%s' is not a registered environment." % v)
if cherrypy.codecoverage:
from cherrypy.lib import covercp
covercp.start()
# If sessions are stored in files and we
# use threading, we need a lock on the file
if (conf('server.thread_pool') > 1
and conf('session.storage_type') == 'file'):
cherrypy._sessionFileLock = threading.RLock()
# Initialize the built in filters
filters.init()
def start(self):
"""Start the application server engine."""
self.state = STARTING
self.interrupt = None
conf = cherrypy.config.get
# Autoreload. Note that, if we're not starting our own HTTP server,
# autoreload could do Very Bad Things when it calls sys.exit, but
# deployers will just have to be educated and responsible for it.
if conf('autoreload.on', False):
try:
freq = conf('autoreload.frequency', 1)
autoreload.main(self._start, freq=freq)
except KeyboardInterrupt:
cherrypy.log("<Ctrl-C> hit: shutting down autoreloader", "ENGINE")
self.stop()
except SystemExit:
cherrypy.log("SystemExit raised: shutting down autoreloader", "ENGINE")
self.stop()
# We must raise here: if this is a process spawned by
# autoreload, then it must return its error code to
# the parent.
raise
return
self._start()
def _start(self):
for func in self.on_start_server_list:
func()
self.state = STARTED
def block(self):
"""Block forever (wait for stop(), KeyboardInterrupt or SystemExit)."""
try:
while self.state != STOPPED:
time.sleep(.1)
if self.interrupt:
raise self.interrupt
except KeyboardInterrupt:
cherrypy.log("<Ctrl-C> hit: shutting down app server", "ENGINE")
self.stop()
except SystemExit:
cherrypy.log("SystemExit raised: shutting down app server", "ENGINE")
self.stop()
raise
except:
# Don't bother logging, since we're going to re-raise.
self.interrupt = sys.exc_info()[1]
self.stop()
raise
def stop(self):
"""Stop the application server engine."""
if self.state != STOPPED:
for thread_ident, i in self.seen_threads.iteritems():
for func in self.on_stop_thread_list:
func(i)
self.seen_threads.clear()
for func in self.on_stop_server_list:
func()
self.state = STOPPED
cherrypy.log("CherryPy shut down", "ENGINE")
def restart(self):
"""Restart the application server engine."""
self.stop()
self.start()
def wait(self):
"""Block the caller until ready to receive requests (or error)."""
while not self.ready:
time.sleep(.1)
if self.interrupt:
msg = "The CherryPy application server errored"
raise cherrypy.NotReady(msg, "ENGINE")
def _is_ready(self):
return bool(self.state == STARTED)
ready = property(_is_ready, doc="Return True if the server is ready to"
" receive requests, False otherwise.")
def request(self, clientAddress, remoteHost, scheme="http"):
"""Obtain an HTTP Request object.
clientAddress: the (IP address, port) of the client
remoteHost: should be the client's host name. If not available
(because no reverse DNS lookup is performed), the client
IP should be provided.
scheme: either "http" or "https"; defaults to "http"
"""
if self.state == STOPPED:
raise cherrypy.NotReady("The CherryPy server has stopped.")
elif self.state == STARTING:
raise cherrypy.NotReady("The CherryPy server could not start.")
threadID = threading._get_ident()
if threadID not in self.seen_threads:
if cherrypy.codecoverage:
from cherrypy.lib import covercp
covercp.start()
i = len(self.seen_threads) + 1
self.seen_threads[threadID] = i
for func in self.on_start_thread_list:
func(i)
r = self.request_class(clientAddress[0], clientAddress[1],
remoteHost, scheme)
cherrypy.serving.request = r
cherrypy.serving.response = self.response_class()
return r
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