third_party/blink/public/mojom/fetch/fetch_api_request.mojom

// Copyright 2017 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 blink.mojom;

import "mojo/public/mojom/base/unguessable_token.mojom";
import "services/network/public/mojom/fetch_api.mojom";
import "services/network/public/mojom/request_context_frame_type.mojom";
import "services/network/public/mojom/url_loader.mojom";
import "third_party/blink/public/mojom/blob/serialized_blob.mojom";
import "third_party/blink/public/mojom/referrer.mojom";
import "url/mojom/url.mojom";


// Type of the context associated with a request.
// https://fetch.spec.whatwg.org/#concept-request-destination.
// TODO(crbug.com/889751): This is a deprecated spec concept, figure out
// how to refactor this to match the new spec concepts, 'destination' and
// 'initiator'.
enum RequestContextType {
  UNSPECIFIED,
  AUDIO,
  BEACON,
  CSP_REPORT,
  DOWNLOAD,
  EMBED,
  EVENT_SOURCE,
  FAVICON,
  FETCH,
  FONT,
  FORM,
  FRAME,
  HYPERLINK,
  IFRAME,
  IMAGE,
  IMAGE_SET,
  IMPORT,
  INTERNAL,
  LOCATION,
  MANIFEST,
  OBJECT,
  PING,
  PLUGIN,
  PREFETCH,
  SCRIPT,
  SERVICE_WORKER,
  SHARED_WORKER,
  SUBRESOURCE,
  STYLE,
  TRACK,
  VIDEO,
  WORKER,
  XML_HTTP_REQUEST,
  XSLT,
};

// https://fetch.spec.whatwg.org/#concept-request-cache-mode
enum FetchCacheMode {
  // "default": Fetch will inspect the HTTP cache on the way to the network. If
  // there is a fresh response it will be used. If there is a stale response a
  // conditional request will be created, and a normal request otherwise. It
  // then updates the HTTP cache with the response.
  kDefault,

  // "no-store": Fetch behaves as if there is no HTTP cache at all.
  kNoStore,

  // "reload": Fetch behaves as if there is no HTTP cache on the way to the
  // network. Ergo, it creates a normal request and updates the HTTP cache with
  // the response.
  kBypassCache,

  // "no-cache": Fetch creates a conditional request if there is a response in
  // the HTTP cache and a normal request otherwise. It then updates the HTTP
  // cache with the response.
  kValidateCache,

  // "force-cache": Fetch uses any response in the HTTP cache matching the
  // request, not paying attention to staleness. If there was no response, it
  // creates a normal request and updates the HTTP cache with the response.
  kForceCache,

  // "only-if-cached": Fetch uses any response in the HTTP cache matching the
  // request, not paying attention to staleness. If there was no response, it
  // returns a network error.
  kOnlyIfCached,

  // Unspecified ones
  // Similar to ONLY_IF_CACHED, but checks freshness strictly.
  kUnspecifiedOnlyIfCachedStrict,
  // Used by devtools to trigger a request which ends up in CACHE_MISS.
  kUnspecifiedForceCacheMiss,
};

// Corresponds to Fetch request's "importance mode"
// Currently discussed at: https://github.com/WICG/priority-hints
// TODO(domfarolino): add a spec link to this once specified.
enum FetchImportanceMode {
  kImportanceLow,
  kImportanceAuto,
  kImportanceHigh
};

// Request headers for FetchAPIRequest. This is typemapped to a container with a
// case insensitive compare or hash function.
struct FetchAPIRequestHeaders {
  map<string, string> headers;
};

// Struct representing a Request:
// https://fetch.spec.whatwg.org/#request-class
// Compared to network.mojom.URLRequest which is kind of internal data in the
// loading stack, FetchAPIRequest acts as a direct representation of the JS
// Request object in all API implementations like Background Fetch, Cache
// Storage and Service Worker, with no need to care how the loading logic
// happens.
// Note: When updating this struct, also update
// content/common/fetch/fetch_request_type_converters.cc.
struct FetchAPIRequest {
  network.mojom.FetchRequestMode mode = network.mojom.FetchRequestMode.kNoCors;
  bool is_main_resource_load = false;
  RequestContextType request_context_type = RequestContextType.UNSPECIFIED;
  network.mojom.RequestContextFrameType frame_type =
    network.mojom.RequestContextFrameType.kNone;
  url.mojom.Url url;
  string method;
  FetchAPIRequestHeaders headers;

  // Note: |blob| and |body| are mutually exclusive.
  // |blob| is used in implementing Background Fetch APIs, also used to
  // represent the FetchEvent#request#body dispatched to service workers for
  // non-S13nServiceWorker case.
  // |body| is used only to represent the FetchEvent#request#body dispatched to
  // service workers for S13nServiceWorker case.
  // TODO(crbug.com/911930): Remove |blob| and use |body| instead everywhere.
  SerializedBlob? blob;
  network.mojom.URLRequestBody? body;

  Referrer? referrer;
  network.mojom.FetchCredentialsMode credentials_mode =
    network.mojom.FetchCredentialsMode.kOmit;
  FetchCacheMode cache_mode = FetchCacheMode.kDefault;
  network.mojom.FetchRedirectMode redirect_mode =
    network.mojom.FetchRedirectMode.kFollow;
  string? integrity;
  network.mojom.RequestPriority priority = network.mojom.RequestPriority.kIdle;

  // Id of the original requestor window.
  // See network::ResourceRequest::fetch_window_id.
  mojo_base.mojom.UnguessableToken? fetch_window_id;

  bool keepalive = false;
  bool is_reload = false;
  bool is_history_navigation = false;
};