void asyncCopy ( nsIRequestObserver observer , nsISupports observerContext )

AsyncCopy triggers the start of the copy. The observer will be notified when the copy completes.

Arguments:

observer: receives notifications.

observerContext: passed to observer methods.

void init ( nsIInputStream source , nsIOutputStream sink , nsIEventTarget target , PRBool sourceBuffered , PRBool sinkBuffered , PRUint32 chunkSize )

Initialize the stream copier.

NOTE: at least one of the streams must be buffered.

Arguments:

source: contains the data to be copied.

sink: specifies the destination for the data.

target: specifies the thread on which the copy will occur. a null value is permitted and will cause the copy to occur on an unspecified background thread.

sourceBuffered: true if source implements ReadSegments.

sinkBuffered: true if sink implements WriteSegments.

chunkSize: specifies how many bytes to read/write at a time. this controls the granularity of the copying. it should match the segment size of the "buffered" streams involved.