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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 "nsISupports.idl"
#include "nsIContentPolicyBase.idl"

interface nsIChannel;
interface nsIConsoleReportCollector;
interface nsIOutputStream;
interface nsIURI;

%{C++
#include "nsIConsoleReportCollector.h"
namespace mozilla {
namespace dom {
class ChannelInfo;
}
}
%}

[ptr] native ChannelInfo(mozilla::dom::ChannelInfo);

/**
 * Interface to allow implementors of nsINetworkInterceptController to control the behaviour
 * of intercepted channels without tying implementation details of the interception to
 * the actual channel. nsIInterceptedChannel is expected to be implemented by objects
 * which do not implement nsIChannel.
 */

[scriptable, uuid(f4b82975-6a86-4cc4-87fe-9a1fd430c86d)]
interface nsIInterceptedChannel : nsISupports
{
    /**
     * Instruct a channel that has been intercepted to continue with the original
     * network request.
     */
    void resetInterception();

    /**
     * Set the status and reason for the forthcoming synthesized response.
     * Multiple calls overwrite existing values.
     */
    void synthesizeStatus(in uint16_t status, in ACString reason);

    /**
     * Attach a header name/value pair to the forthcoming synthesized response.
     * Overwrites any existing header value.
     */
    void synthesizeHeader(in ACString name, in ACString value);

    /**
     * Instruct a channel that has been intercepted that a response has been
     * synthesized and can now be read. No further header modification is allowed
     * after this point. The caller may optionally pass a spec for a URL that
     * this response originates from; an empty string will cause the original
     * intercepted request's URL to be used instead.
     */
    void finishSynthesizedResponse(in ACString finalURLSpec);

    /**
     * Cancel the pending intercepted request.
     * @return NS_ERROR_FAILURE if the response has already been synthesized or
     *         the original request has been instructed to continue.
     */
    void cancel(in nsresult status);

    /**
     * The synthesized response body to be produced.
     */
    readonly attribute nsIOutputStream responseBody;

    /**
     * The underlying channel object that was intercepted.
     */
    readonly attribute nsIChannel channel;

    /**
     * The URL of the underlying channel object, corrected for a potential
     * secure upgrade.
     */
    readonly attribute nsIURI secureUpgradedChannelURI;

    /**
     * This method allows to override the channel info for the channel.
     */
    [noscript]
    void setChannelInfo(in ChannelInfo channelInfo);

    /**
     * Get the internal load type from the underlying channel.
     */
    [noscript]
    readonly attribute nsContentPolicyType internalContentPolicyType;

    [noscript]
    readonly attribute nsIConsoleReportCollector consoleReportCollector;

%{C++
    already_AddRefed<nsIConsoleReportCollector>
    GetConsoleReportCollector()
    {
      nsCOMPtr<nsIConsoleReportCollector> reporter;
      GetConsoleReportCollector(getter_AddRefs(reporter));
      return reporter.forget();
    }
%}

    /**
     * Allow the ServiceWorkerManager to set an RAII-style object on the
     * intercepted channel that should be released once the channel is
     * torn down.
     */
    [noscript]
    void setReleaseHandle(in nsISupports aHandle);
};

/**
 * Interface to allow consumers to attach themselves to a channel's
 * notification callbacks/loadgroup and determine if a given channel
 * request should be intercepted before any network request is initiated.
 */

[scriptable, uuid(70d2b4fe-a552-48cd-8d93-1d8437a56b53)]
interface nsINetworkInterceptController : nsISupports
{
    /**
     * Returns true if a channel should avoid initiating any network
     * requests until specifically instructed to do so.
     *
     * @param aURI the URI being requested by a channel
     * @param aIsNavigate True if the request is for a navigation, false for a fetch.
     */
    bool shouldPrepareForIntercept(in nsIURI aURI, in bool aIsNonSubresourceRequest);

    /**
     * Notification when a given intercepted channel is prepared to accept a synthesized
     * response via the provided stream.
     *
     * @param aChannel the controlling interface for a channel that has been intercepted
     */
    void channelIntercepted(in nsIInterceptedChannel aChannel);
};