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Resource limiting policies.
@seealso: See also L{twisted.protocols.htb} for rate limiting.
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Compute a log prefix for a wrapper and the object it wraps.
@rtype: C{str}
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Wraps protocol instances and acts as their transport as well.
@ivar wrappedProtocol: An L{IProtocol<twisted.internet.interfaces.IProtocol>}
provider to which L{IProtocol<twisted.internet.interfaces.IProtocol>}
method calls onto this L{ProtocolWrapper} will be proxied.
@ivar factory: The L{WrappingFactory} which created this
L{ProtocolWrapper}.
r �factory�WrappingFactory�wrappedProtocolc C s || _ || _d S �N)r r )�selfr r r r r �__init__5 s
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Use a customized log prefix mentioning both the wrapped protocol and
the current one.
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When a connection is made, register this wrapper with its factory,
save the real transport, and connect the wrapped protocol to this
L{ProtocolWrapper} to intercept any transport calls it makes.
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writeSequencer$ r r r r' R r& z ProtocolWrapper.writeSequencec C s d| _ | j�� d S �N� )�
disconnectingr! �loseConnectionr r r r r+ U s z ProtocolWrapper.loseConnectionc C �
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stopConsumingr r r r r9 e r8 z ProtocolWrapper.stopConsumingc C s t | j|�S r )�getattrr! �r �namer r r � __getattr__h s zProtocolWrapper.__getattr__c C r" r )r � dataReceivedr$ r r r r> m r& z ProtocolWrapper.dataReceivedc C s" | j �| � | j�|� d | _d S r )r �unregisterProtocolr �connectionLost�r �reasonr r r r@ p s
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__module__� __qualname__�__doc__r* r � IProtocolr r r r# r' r+ r- r/ r1 r7 r9 r= r> r@ r r r r r ' s* �
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Wraps a factory and its protocols, and keeps track of them.
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Generate a log prefix mentioning both the wrapped factory and this one.
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zWrappingFactory.doStartc C rK r )rH �doStopr r r r r rN � rM zWrappingFactory.doStopc C r" r )rH �startedConnecting)r � connectorr r r rO � r& z!WrappingFactory.startedConnectingc C r0 r )rH �clientConnectionFailed�r rP rB r r r rQ � r5 z&WrappingFactory.clientConnectionFailedc C r0 r )rH �clientConnectionLostrR r r r rS � r5 z$WrappingFactory.clientConnectionLostc C s | � | | j�|��S r )rG rH �
buildProtocol�r �addrr r r rT � s z WrappingFactory.buildProtocolc C s d| j |< dS )z8
Called by protocol to register itself.
r) N�rI �r �pr r r r � s z WrappingFactory.registerProtocolc C s | j |= dS )z8
Called by protocols when they go away.
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Protocol for L{ThrottlingFactory}.
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Throttles bandwidth and number of connections.
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registered.
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Wrapper around
L{reactor.callLater<twisted.internet.interfaces.IReactorTime.callLater>}
for test purpose.
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Called by protocol to tell us more bytes were written.
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Called by protocol to tell us more bytes were read.
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Checks if we've passed bandwidth limits.
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Throttle reads on all protocols.
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Stop throttling reads on all protocols.
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Throttle writes on all protocols.
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Stop throttling writes on all protocols.
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Factory that limits the number of simultaneous connections.
@type connectionCount: C{int}
@ivar connectionCount: number of current connections.
@type connectionLimit: C{int} or L{None}
@cvar connectionLimit: maximum number of connections.
@type overflowProtocol: L{Protocol} or L{None}
@cvar overflowProtocol: Protocol to use for new connections when
connectionLimit is exceeded. If L{None} (the default value), excess
connections will be closed immediately.
r N�overflowProtocolc C sX | j d u s | j| j k r| �� }n | jd u rd S | �� }| |_t| |�}| jd7 _|S r( )�connectionLimitrq rG r� r r )r rV r rG r r r rT � s
z*LimitTotalConnectionsFactory.buildProtocolc C s d S r r rX r r r r � s z-LimitTotalConnectionsFactory.registerProtocolc C s | j d8 _ d S r( )rq rX r r r r? � r5 z/LimitTotalConnectionsFactory.unregisterProtocol)r rC rD rE rq r� r� r r r
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Protocol that automatically disconnects when the connection is idle.
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Constructor.
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timing out.
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timeoutPeriod�
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Set a timeout.
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Cancel the timeout.
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Reset the timeout, usually because some activity just happened.
N)r� �resetr� r r r r � resetTimeout� s �z TimeoutProtocol.resetTimeoutc C � | � � t�| |� d S r )r� r r# r$ r r r r# � � zTimeoutProtocol.writec C r� r )r� r r' rb r r r r' � r� z TimeoutProtocol.writeSequencec C r� r )r� r r> r$ r r r r> � r� z TimeoutProtocol.dataReceivedc C r� r )r� r r@ rA r r r r@ � r� z TimeoutProtocol.connectionLostc C s | � � dS )z�
This method is called when the timeout is triggered.
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something else to happen.
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Factory for TimeoutWrapper.
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�z TimeoutFactory.buildProtocolc C r{ r| r~ r� r r r r� r� zTimeoutFactory.callLaterN)r� ) r rC rD rE r� rG r rT r� r r r r r� � s
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@param factory: factory which created this protocol.
@type factory: L{protocol.Factory}.
@param wrappedProtocol: the underlying protocol.
@type wrappedProtocol: C{protocol.Protocol}.
@param logfile: file opened for writing used to write log messages.
@type logfile: C{file}
@param lengthLimit: maximum size of the datareceived logged.
@type lengthLimit: C{int}
@param number: identifier of the connection.
@type number: C{int}.
N)r r �logfile� lengthLimit�_number)r r r r� r� �numberr r r r s
z TrafficLoggingProtocol.__init__c C s | j �|d � | j �� d S )N�
)r� r# �flush)r �liner r r �_log* s zTrafficLoggingProtocol._logc C s. | j rt|�| j kr|d | j d � d }|S )N� z <... elided>)r� r^ r$ r r r �
_mungeData. s z!TrafficLoggingProtocol._mungeDatac C s | � d� t�| �S )N�*)r� r �connectionMader r r r r� 4 s
z%TrafficLoggingProtocol.connectionMadec C �& | � d| j| �|�f � t�| |�S �NzC %d: %r)r� r� r� r r> r$ r r r r> 8 � z#TrafficLoggingProtocol.dataReceivedc C s | � d| j|f � t�| |�S r� )r� r� r r@ rA r r r r@ < s z%TrafficLoggingProtocol.connectionLostc C r� )NzS %d: %r)r� r� r� r r# r$ r r r r# A r� z TrafficLoggingProtocol.writec s. � � d� j� fdd�|D �f � t�� |�S )Nz SV %d: %rc s g | ]}� � |��qS r )r� )�.0�dr r r �
<listcomp>F s z8TrafficLoggingProtocol.writeSequence.<locals>.<listcomp>)r� r� r r' )r �iovecr r r r' E s " z$TrafficLoggingProtocol.writeSequencec C s | � d| jf � t�| �S )NzS %d: *)r� r� r r+ r r r r r+ I s
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t |d�S )N�w)�openr; r r r r� X r. zTrafficLoggingFactory.openc C sF | j d7 _ | �| jd t| j � �}| �| | j�|�|| j| j �S )Nr) �-)�_counterr� r� �strrG rH rT r� )r rV r� r r r rT [ s
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Reset the value of the counter used to identify connections.
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Mixin for protocols which wish to timeout connections.
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default, closes the connection.
@cvar timeOut: The number of seconds after which to timeout the connection.
N�timeOutc C r{ r| r~ r� r r r r� | r� zTimeoutMixin.callLaterc C s. | j dur| jdur| j �| j� dS dS dS )a�
Reset the timeout count down.
If the connection has already timed out, then do nothing. If the
timeout has been cancelled (probably using C{setTimeout(None)}), also
do nothing.
It's often a good idea to call this when the protocol has received
some meaningful input from the other end of the connection. "I've got
some data, they're still there, reset the timeout".
N)�_TimeoutMixin__timeoutCallr� r� r r r r r� � s �zTimeoutMixin.resetTimeoutc C s~ | j }|| _ | jdur1|du r)z| j�� W n
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Change the timeout period
@type period: C{int} or L{None}
@param period: The period, in seconds, to change the timeout to, or
L{None} to disable the timeout.
N) r� r� r� r r� r� r� r� �_TimeoutMixin__timedOut)r r� �prevr r r r� � s
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Called when the connection times out.
Override to define behavior other than dropping the connection.
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