pynetdicom.transport.AssociationServer

class pynetdicom.transport.AssociationServer(ae, address, ae_title, contexts, ssl_context=None, evt_handlers=None, request_handler=None)

An Association server implementation.

New in version 1.2.

Changed in version 1.5: Added request_handler keyword parameter.

Any attempts to connect will be assumed to be from association requestors.

The server should be started with serve_forever(poll_interval), where poll_interval is the timeout (in seconds) that the select.select() call will block for (default 0.5). A value of 0 specifies a poll and never blocks. A value of None blocks until a connection is ready.

ae

The parent AE that is running the server.

Type

ae.ApplicationEntity

request_queue_size

Default 5.

Type

int

server_address

The (host, port) that the server is running on.

Type

2-tuple

ssl_context

The ssl.SSLContext used to wrap client sockets, or None if no TLS is required (default).

Type

ssl.SSLContext or None

__init__(ae, address, ae_title, contexts, ssl_context=None, evt_handlers=None, request_handler=None)

Create a new AssociationServer, bind a socket and start listening.

Parameters

• ae (ae.ApplicationEntity) – The parent AE that’s running the server.

• address (2-tuple) – The (host, port) that the server should run on.

• ae_title (bytes) – The AE title of the SCP.

• contexts (list of presentation.PresentationContext) – The SCPs supported presentation contexts.

• ssl_context (ssl.SSLContext, optional) – If TLS is to be used then this should be the ssl.SSLContext used to wrap the client sockets, otherwise if None then no TLS will be used (default).

• evt_handlers (list of 2- or 3-tuple, optional) – A list of (event, callable) or (event, callable, args), the callable function to run when event occurs and the optional extra args to pass to the callable.

• request_handler (type) – The request handler class; an instance of this class is created for each request. Should be a subclass of BaseRequestHandler.

Methods

__init__(ae, address, ae_title, contexts[, …])	Create a new AssociationServer, bind a socket and start listening.
bind(event, handler[, args])	Bind a callable handler to an event.
close_request(request)	Called to clean up an individual request.
fileno()	Return socket file number.
finish_request(request, client_address)	Finish one request by instantiating RequestHandlerClass.
get_events()	Return a list of currently bound events.
get_handlers(event)	Return handlers bound to a specific event.
get_request()	Handle a connection request.
handle_error(request, client_address)	Handle an error gracefully.
handle_request()	Handle one request, possibly blocking.
handle_timeout()	Called if no new request arrives within self.timeout.
process_request(request, client_address)	Process a connection request.
serve_forever([poll_interval])	Handle one request at a time until shutdown.
server_activate()	Called by constructor to activate the server.
server_bind()	Bind the socket and set the socket options.
server_close()	Close the server.
service_actions()	Called by the serve_forever() loop.
shutdown()	Completely shutdown the server and close it’s socket.
shutdown_request(request)	Called to shutdown and close an individual request.
unbind(event, handler)	Unbind a callable handler from an event.
verify_request(request, client_address)	Verify the request.

Attributes

active_associations	Return the server’s running Association acceptor instances
address_family
allow_reuse_address
request_queue_size
socket_type
ssl_context	Return the ssl.SSLContext (if available).
timeout

property active_associations

Return the server’s running Association acceptor instances

bind(event, handler, args=None)

Bind a callable handler to an event.

New in version 1.3.

Changed in version 1.5: Added args keyword parameter.

Parameters

• event (namedtuple) – The event to bind the function to.

• handler (callable) – The function that will be called if the event occurs.

• args (list, optional) – Optional extra arguments to be passed to the handler (default: no extra arguments passed to the handler).

get_events()

Return a list of currently bound events.

New in version 1.3.

get_handlers(event)

Return handlers bound to a specific event.

New in version 1.3.

Changed in version 1.5: Returns a 2-tuple of (callable, args) or list of 2-tuple.

Parameters

event (namedtuple) – The event bound to the handlers.

Returns

If the event is a notification event then returns a list of 2-tuples containing the callable functions bound to event and the arguments passed to the callable as (callable, args). If the event is an intervention event then returns either a 2-tuple of (callable, args) if a handler is bound to the event or (None, None) if no handler has been bound.

Return type

2-tuple of (callable, args), list of 2-tuple

get_request()

Handle a connection request.

If ssl_context is set then the client socket will be wrapped using SSLContext.wrap_socket().

Returns

• client_socket (socket.socket) – The connection request.

• address (2-tuple) – The client’s address as (host, port).

process_request(request, client_address)

Process a connection request.

server_bind()

Bind the socket and set the socket options.

• socket.SO_REUSEADDR is set to 1

• socket.SO_RCVTIMEO is set to AE.network_timeout unless the value is None in which case it will be left unset.

server_close()

Close the server.

shutdown()

Completely shutdown the server and close it’s socket.

property ssl_context

Return the ssl.SSLContext (if available).

unbind(event, handler)

Unbind a callable handler from an event.

New in version 1.3.

Parameters

• event (3-tuple) – The event to unbind the function from.

• handler (callable) – The function that will no longer be called if the event occurs.