print(f"Delegate: exception reported in task {task}")
traceback.print_exception(etype, evalue, etb)
def taskEnded(self, queue, task):
print(f"Delegate: task ended: {task}")
d = Delegate()
q1 = TaskQueue(2)
q2 = TaskQueue(2, delegate = d)
tok = TaskOK()
terr = TaskError()
print("-------- Queue without delegae --------")
for _ in range(100):
q1 << tok << terr
q1.join()
print("-------- Queue with delegae --------")
for _ in range(100):
q2 << tok << terr
q2.join()
class Service(Primitive, Logged):
def __init__(self, config, logger=None):
name = config["name"]
#print("Service(): config:", config)
self.ServiceName = name
Primitive.__init__(self, name=f"[service {name}]")
Logged.__init__(self, f"[app {name}]", logger, debug=True)
self.Config = None
self.Initialized = self.initialize(config)
@synchronized
def initialize(self, config=None):
config = config or self.Config
self.Config = config
reload_files = config.get("touch_reload", [])
if isinstance(reload_files, str):
reload_files = [reload_files]
self.ReloadFileTimestamps = {
path: self.mtime(path)
for path in reload_files
}
self.Prefix = config.get("prefix", "/")
self.ReplacePrefix = config.get("replace_prefix")
self.Timeout = config.get("timeout", 10)
saved_path = sys.path[:]
saved_modules = set(sys.modules.keys())
saved_environ = os.environ.copy()
try:
args = None
if "file" in config:
print(
'*** Use of "file" parameter is deprecated. Use "module" instead'
)
self.ScriptFileName = fname = config.get("module",
config.get("file"))
g = {}
extra_path = config.get("python_path")
if extra_path is not None:
if isinstance(extra_path, str):
extra_path = [extra_path]
sys.path = extra_path + sys.path
if "env" in config:
os.environ.update(config["env"])
try:
exec(open(fname, "r").read(), g)
except:
tb = traceback.format_exc()
self.log_error(f"Error importing module {fname}:\n{tb}")
return False
if "create" in config:
# deprecated
print(
'*** Use of "create" parameter is deprecated. Use "application: function()" instead'
)
application = config["create"] + "()"
else:
application = config.get("application", "application")
if application.endswith("()"):
args = config.get("args")
fcn_name = application[:-2]
fcn = g.get(fcn_name)
if fcn is None:
self.log_error(
f"Application creation function {fcn_name} not found in module {fname}"
)
return False
try:
if isinstance(args, dict):
app = fcn(**args)
elif isinstance(args, (list, tuple)):
app = fcn(*args)
elif args is None:
app = fcn()
else:
app = fcn(args)
except:
tb = traceback.format_exc()
self.log_error(
f"Error calling the application initialization function:\n{tb}"
)
return False
if app is None:
self.log_error(
f'Application creation function {fcn_name} returned None'
)
return False
else:
app = g.get(application)
if app is None:
self.log_error(
f'Application object "{application}" not found in {fname}'
)
return False
self.AppArgs = args
self.WSGIApp = app
max_workers = config.get("max_workers", 5)
queue_capacity = config.get("queue_capacity", 10)
self.RequestQueue = TaskQueue(max_workers,
capacity=queue_capacity,
delegate=self)
self.log("initiaized")
except:
tb = traceback.format_exc()
self.log_error(f"Error initializing application:\n{tb}")
return False
finally:
sys.path = saved_path
extra_modules = set(sys.modules.keys()) - set(saved_modules)
#print("loadApp: removing modules:", sorted(list(extra_modules)))
for m in extra_modules:
del sys.modules[m]
for n in set(os.environ.keys()) - set(saved_environ.keys()):
del os.environ[n]
os.environ.update(saved_environ)
return True
def taskFailed(self, queue, task, exc_type, exc_value, tb):
self.log_error(
"request failed:",
"".join(traceback.format_exception(exc_type, exc_value, tb)))
try:
task.Request.close()
except:
pass
def accept(self, request):
#print(f"Service {self}: accept()")
if not self.Initialized:
return False
header = request.HTTPHeader
uri = header.URI
self.debug("accept: uri:", uri, " prefix:", self.Prefix)
#print("Sevice", self," accept: uri:", uri, " prefix:", self.Prefix)
if uri.startswith(self.Prefix):
uri = uri[len(self.Prefix):]
if not uri.startswith("/"): uri = "/" + uri
if self.ReplacePrefix:
uri = self.ReplacePrefix + uri
header.replaceURI(uri)
request.AppName = self.ServiceName
script_path = self.Prefix
while script_path and script_path.endswith("/"):
script_path = script_path[:-1]
request.Environ["SCRIPT_NAME"] = script_path
request.Environ["SCRIPT_FILENAME"] = self.ScriptFileName
self.RequestQueue.addTask(
RequestTask(self.WSGIApp, request, self.Logger))
#print("Service", self, " accepted")
return True
else:
#print("Service", self, " rejected")
return False
def close(self):
self.RequestQueue.hold()
def join(self):
self.RequestQueue.join()
def mtime(self, path):
try:
return os.path.getmtime(path)
except:
return None
def reloadIfNeeded(self):
for path, old_timestamp in self.ReloadFileTimestamps.items():
mt = self.mtime(path)
if mt is not None and mt != old_timestamp:
ct = time.ctime(mt)
self.log(f"file {path} was modified at {ct}")
break
else:
return False
self.Initialized = self.initialize()
class HTTPServer(PyThread, Logged):
def __init__(self,
port,
app=None,
services=[],
sock=None,
logger=None,
max_connections=100,
timeout=20.0,
enabled=True,
max_queued=100,
logging=False,
log_file="-",
debug=None,
certfile=None,
keyfile=None,
verify="none",
ca_file=None,
password=None):
PyThread.__init__(self)
self.Port = port
self.Sock = sock
assert self.Port is not None, "Port must be specified"
if logger is None and logging:
logger = Logger(log_file)
#print("logs sent to:", f)
Logged.__init__(self, f"[server {self.Port}]", logger, debug=True)
self.Logger = logger
self.Timeout = timeout
max_connections = max_connections
queue_capacity = max_queued
self.RequestReaderQueue = TaskQueue(max_connections,
capacity=queue_capacity,
delegate=self)
self.SocketWrapper = SSLSocketWrapper(
certfile, keyfile, verify, ca_file, password) if keyfile else None
if app is not None:
services = [Service(app, logger)]
self.Services = services
self.Stop = False
def close(self):
self.Stop = True
self.RequestReaderQueue.hold()
def join(self):
self.RequestReaderQueue.join()
@staticmethod
def from_config(config,
services,
logger=None,
logging=False,
log_file=None,
debug=None):
port = config["port"]
timeout = config.get("timeout", 20.0)
max_connections = config.get("max_connections", 100)
queue_capacity = config.get("queue_capacity", 100)
# TLS
certfile = config.get("cert")
keyfile = config.get("key")
verify = config.get("verify", "none")
ca_file = config.get("ca_file")
password = config.get("password")
#print("HTTPServer.from_config: services:", services)
return HTTPServer(port,
services=services,
logger=logger,
max_connections=max_connections,
timeout=timeout,
max_queued=queue_capacity,
logging=logging,
log_file=log_file,
debug=debug,
certfile=certfile,
keyfile=keyfile,
verify=verify,
ca_file=ca_file,
password=password)
def setServices(self, services):
self.Services = services
def connectionCount(self):
return len(self.Connections)
def run(self):
if self.Sock is None:
# therwise use the socket supplied to the constructior
self.Sock = socket(AF_INET, SOCK_STREAM)
self.Sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
self.Sock.bind(('', self.Port))
self.Sock.listen(10)
while not self.Stop:
self.debug("--- accept loop port=%d start" % (self.Port, ))
csock = None
caddr = ('-', '-')
try:
csock, caddr = self.Sock.accept()
self.connection_accepted(csock, caddr)
except Exception as exc:
#print(exc)
if not self.Stop:
self.debug("connection processing error: %s" %
(traceback.format_exc(), ))
self.log_error(caddr,
"Error processing connection: %s" % (exc, ))
if csock is not None:
try:
csock.close()
except:
pass
self.debug("--- accept loop port=%d end" % (self.Port, ))
if self.Stop: self.debug("stopped")
try:
self.Sock.close()
except:
pass
self.Sock = None
def connection_accepted(self, csock,
caddr): # called externally by multiserver
request = Request(self.Port, csock, caddr)
self.debug("connection %s accepted from %s:%s" %
(request.Id, caddr[0], caddr[1]))
reader = RequestReader(self, request, self.SocketWrapper, self.Timeout,
self.Logger)
self.RequestReaderQueue << reader
@synchronized
def stop(self):
self.Stop = True
try:
self.Sock.close()
except:
pass
@synchronized
def dispatch(self, request):
for service in self.Services:
if service.accept(request):
return service
else:
return None
def taskFailed(self, queue, task, exc_type, exc, tb):
traceback.print_exception(exc_type, exc, tb)