content/common/navigation_client.mojom

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module content.mojom;

import "services/network/public/mojom/url_loader.mojom";
import "content/common/service_worker/controller_service_worker.mojom";
import "content/common/url_loader_factory_bundle.mojom";
import "content/public/common/transferrable_url_loader.mojom";
import "mojo/public/mojom/base/unguessable_token.mojom";
import "url/mojom/url.mojom";
import "third_party/blink/public/web/commit_result.mojom";

// See src/content/common/navigation_params.h
[Native]
struct CommonNavigationParams;

// See src/content/common/navigation_params.h
[Native]
struct RequestNavigationParams;

interface NavigationClient {
  // Tells the renderer that a navigation is ready to commit.
  //
  // The renderer should bind the |url_loader_client_endpoints| to an
  // URLLoaderClient implementation to continue loading the document that will
  // be the result of the committed navigation.
  //
  // Note: |url_loader_client_endpoints| will be empty iff the navigation URL
  // wasn't handled by the network stack (i.e. about:blank, ...)
  //
  // When the Network Service is enabled, |subresource_loader_factories| may
  // also be provided by the browser as a a means for the renderer to load
  // subresources where applicable.
  //
  // |controller_service_worker_info| may also be provided by the browser if the
  // frame that is being navigated is supposed to be controlled by a Service
  // Worker.
  //
  // For automation driver-initiated navigations over the devtools protocol,
  // |devtools_navigation_token_| is used to tag the navigation. This navigation
  // token is then sent into the renderer and lands on the DocumentLoader. That
  // way subsequent Blink-level frame lifecycle events can be associated with
  // the concrete navigation.
  // - The value should not be sent back to the browser.
  // - The value on DocumentLoader may be generated in the renderer in some
  // cases, and thus shouldn't be trusted.
  // TODO(crbug.com/783506): Replace devtools navigation token with the generic
  // navigation token that can be passed from renderer to the browser.
  CommitNavigation(
      network.mojom.URLResponseHead head,
      CommonNavigationParams common_params,
      RequestNavigationParams request_params,
      network.mojom.URLLoaderClientEndpoints? url_loader_client_endpoints,
      handle<data_pipe_consumer>? response_body,
      URLLoaderFactoryBundle? subresource_loader_factories,
      array<TransferrableURLLoader>? subresource_overrides,
      ControllerServiceWorkerInfo? controller_service_worker_info,
      mojo_base.mojom.UnguessableToken devtools_navigation_token);

  // Tells the renderer that a failed navigation is ready to commit.
  //
  // The result of this commit usually results in displaying an error page.
  // Note |error_page_content| may contain the content of the error page
  // (i.e. flattened HTML, JS, CSS).
  //
  // When the Network Service is enabled, |subresource_loader_factories| may
  // also be provided by the browser as a means for the renderer to load
  // subresources where applicable.
  CommitFailedNavigation(
      CommonNavigationParams common_params,
      RequestNavigationParams request_params,
      bool has_stale_copy_in_cache,
      int32 error_code,
      string? error_page_content,
      URLLoaderFactoryBundle? subresource_loader_factories);
};