twisted.protocols.loopback : API documentation

Function	identityPumpPolicy	`identityPumpPolicy` is a policy which delivers each chunk of data written to the given queue as-is to the target.
Function	collapsingPumpPolicy	`collapsingPumpPolicy` is a policy which collapses all outstanding chunks into a single string and delivers it to the target.
Function	loopbackAsync	Establish a connection between `server` and `client` then transfer data between them until the connection is closed. This is often useful for testing a protocol.
Class	LoopbackRelay	Undocumented
Function	loopback	Run session between server and client. DEPRECATED in Twisted 2.5. Use loopbackAsync instead.
Class	LoopbackClientFactory	Undocumented
Function	loopbackTCP	Run session between server and client protocol instances over TCP.
Function	loopbackUNIX	Run session between server and client protocol instances over UNIX socket.
Class	_LoopbackQueue	Trivial wrapper around a list to give it an interface like a queue, which the addition of also sending notifications by way of a Deferred whenever the list has something added to it.
Class	_LoopbackAddress	Undocumented
Class	_LoopbackTransport	Undocumented
Function	_loopbackAsyncBody	Transfer bytes from the output queue of each protocol to the input of the other.
Function	_loopbackAsyncContinue	Undocumented
Class	_FireOnClose	Undocumented

def identityPumpPolicy(queue, target): (source)

identityPumpPolicy is a policy which delivers each chunk of data written to the given queue as-is to the target.

This isn't a particularly realistic policy.

See Also loopbackAsync

def loopbackAsync(server, client, pumpPolicy=identityPumpPolicy): (source)

Establish a connection between server and client then transfer data between them until the connection is closed. This is often useful for testing a protocol.

Parameters	server	The protocol instance representing the server-side of this connection.
	client	The protocol instance representing the client-side of this connection.
	pumpPolicy	When either `server` or `client` writes to its transport, the string passed in is added to a queue of data for the other protocol. Eventually, `pumpPolicy` will be called with one such queue and the corresponding protocol object. The pump policy callable is responsible for emptying the queue and passing the strings it contains to the given protocol's `dataReceived` method. The signature of `pumpPolicy` is `(queue, protocol)`. `queue` is an object with a `get` method which will return the next string written to the transport, or `None` if the transport has been disconnected, and which evaluates to `True` if and only if there are more items to be retrieved via `get`.
Returns	A `Deferred` which fires when the connection has been closed and both sides have received notification of this.

def _loopbackAsyncBody(server, serverToClient, client, clientToServer, pumpPolicy): (source)

Transfer bytes from the output queue of each protocol to the input of the other.

Parameters	server	The protocol instance representing the server-side of this connection.
	serverToClient	The `_LoopbackQueue` holding the server's output.
	client	The protocol instance representing the client-side of this connection.
	clientToServer	The `_LoopbackQueue` holding the client's output.
	pumpPolicy	See `loopbackAsync`.
Returns	A `Deferred` which fires when the connection has been closed and both sides have received notification of this.

t.p.loopback : module documentation