chrome/common/subresource_redirect_service.mojom

// Copyright 2020 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 subresource_redirect.mojom;

import "mojo/public/mojom/base/time.mojom";

// Image loading hints passed by the browser to renderers. Send at most once
// per page load from browser to renderer. The hints are provided to the
// renderer and aid in redirecting these public images to compressed versions.
struct CompressPublicImagesHints {
  array<string> image_urls;
};

// This service is implemented in the browser process and is used by the
// renderer to notify the state of https image compression. This interface is
// associated with a frame.
interface SubresourceRedirectService {
  // Notifies an image fetch from the compression server had failed. When
  // Retry-After response header is present |retry_after| indicates the time
  // after which subsequent image fetches should be initiated, otherwise
  // |retry_after| is zero.
  NotifyCompressedImageFetchFailed(mojo_base.mojom.TimeDelta retry_after);
};

// Render process implemented interface that receives hints from the browser
// about https image compression.
interface SubresourceRedirectHintsReceiver {
  // Sends the public image URL hints from the browser to renderers.
  SetCompressPublicImagesHints(CompressPublicImagesHints images_hints);
};