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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsIHttpHeaderVisitor.idl"
#include "nsIInputStream.idl"

/**
 * The MIME stream separates headers and a datastream. It also allows
 * automatic creation of the content-length header.
 */

[scriptable, uuid(dcbce63c-1dd1-11b2-b94d-91f6d49a3161)]
interface nsIMIMEInputStream : nsIInputStream
{
    /**
     * Adds an additional header to the stream on the form "name: value". May
     * not be called once the stream has been started to be read.
     * @param name   name of the header
     * @param value  value of the header
     */
    void addHeader(in string name, in string value);

    /**
     * Visits all headers which have been added via addHeader.  Calling
     * addHeader while visiting request headers has undefined behavior.
     *
     * @param aVisitor
     *        The header visitor instance.
     */
    void visitHeaders(in nsIHttpHeaderVisitor visitor);

    /**
     * Sets data-stream. May not be called once the stream has been started
     * to be read.
     * The cursor of the new stream should be located at the beginning of the
     * stream if the implementation of the nsIMIMEInputStream also is used as
     * an nsISeekableStream.
     * @param stream  stream containing the data for the stream
     */
    void setData(in nsIInputStream stream);

    /**
     * Get the wrapped data stream
     */
    readonly attribute nsIInputStream data;
};