gecko-dev/xpcom/io/nsIInputStreamTee.idl

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * Contributor(s):
 *   Darin Fisher <darin@netscape.com> (original author)
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#include "nsIInputStream.idl"

interface nsIOutputStream;

/**
 * A nsIInputStreamTee is a wrapper for an input stream, that when read
 * reads the specified amount of data from its |source| and copies that
 * data to its |sink|.  |sink| must be a blocking output stream.
 */
[scriptable, uuid(44e8b2c8-1ecb-4a63-8b23-3e3500c34f32)]
interface nsIInputStreamTee : nsIInputStream
{
    attribute nsIInputStream source;
    attribute nsIOutputStream sink;
};

%{C++
// factory method
extern NS_COM nsresult
NS_NewInputStreamTee(nsIInputStream **tee, // read from this input stream
                     nsIInputStream *source,
                     nsIOutputStream *sink);
%}