Use mojo for Chrome Loading, Part 1

content/common/url_loader.mojom

+// Copyright 2016 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;
+
+enum ReferrerPolicy {
+  Always,
+  Default,
+  NoReferrerWhenDowngrade,
+  Never,
+  Origin,
+  OriginWhenCrossOrigin,
+  NoReferrerWhenDowngradeOriginWhenCrossOrigin,
+  Last = NoReferrerWhenDowngradeOriginWhenCrossOrigin,
+};
+
+enum ServiceWorkerResponseType {
+  Basic,
+  CORS,
+  Default,
+  Error,
+  Opaque,
+  OpaqueRedirect,
+  Last = OpaqueRedirect,
+};
+
+struct URLRequest {
+  // The request method: GET, POST, etc.
+  string method;
+
+  // The requested URL.
+  string url;

[dcheng, 2016/05/11 17:05:18]

Use url.mojom.Url?

[yhirano, 2016/05/16 14:40:06]

Thanks, but I'm now using IPC ParamTraits and we don't need this property.

+
+  // Usually the URL of the document in the top-level window, which may be
+  // checked by the third-party cookie blocking policy. Leaving it empty may
+  // lead to undesired cookie blocking. Third-party cookie blocking can be
+  // bypassed by setting first_party_for_cookies = url, but this should ideally
+  // only be done if there really is no way to determine the correct value.
+  string first_party_for_cookies;
+
+  // The origin of the context which initiated the request, which will be used
+  // for cookie checks like 'First-Party-Only'.
+  string request_initiator;
+
+  // The referrer to use (may be empty).
+  string referrer;
+
+  // The referrer policy to use.
+  ReferrerPolicy referrer_policy;
+
+  // TODO(yhirano): Add more members from ResourceMsg_Request.
+
+  // These are needed for compatibility with the existing ChromeIPC.
+  int32 request_id;
+  int32 routing_id;
+};
+
+struct URLResponse {
+  // TimeTicks::Now() when the browser received the request from the renderer.
+  int64 request_start;
+  // TimeTicks::Now() when the browser sent the response to the renderer.
+  int64 response_start;
+
+  // The time at which the request was made that resulted in this response.
+  // For cached responses, this time could be "far" in the past.
+  int64 request_time;
+
+  // The time at which the response headers were received. For cached responses,
+  // this time could be "far" in the past.
+  int64 response_time;
+
+  // The HTTP response headers.
+  string? headers;
+
+  // The HTTP response body.
+  handle<data_pipe_consumer>? body;
+
+  // The MIME type of the response body.
+  string mime_type;
+
+  // The character set of the response body.
+  string charset;
+
+  // An opaque string carrying security information pertaining to this
+  // response. This may include information about the SSL connection used.
+  string security_info;
+
+  // True if the resource was loaded in spite of certificate errors.
+  bool has_major_certificate_errors;
+
+  // Content length if available.
+  int64 content_length;
+
+  // Length of the encoded data transferred over the network.
+  int64 encoded_data_length;
+  
+  // The appcache this response was loaded from.
+  int64 appcache_id;
+
+  // The appcache this response was loaded from.
+  string appcache_manifest_url;
+
+  // Detailed timing information used by the WebTiming, HAR and Developer
+  // Tools. Includes socket ID and socket reuse information.
+  // TODO(yhirano): Add this.
+  // LoadTimingInfo load_timing;
+
+  // Actual request and response headers, as obtained from the network stack.
+  // Only present if renderer set report_raw_headers to true and had the
+  // CanReadRawCookies permission.
+  // TODO(yhirano): Add this.
+  // ResourceDevToolsInfo? devtools_info;
+
+  // The path to a file that will contain the response body. It may only
+  // contain a portion of the response body at the time that the ResponseInfo
+  // becomes available.
+  // TODO(yhirano): Add this.
+  // base::FilePath download_file_path;
+
+  // True if the response was delivered using SPDY.
+  bool was_fetched_via_spdy;
+
+  // True if the response was delivered after NPN is negotiated.
+  bool was_npn_negotiated;
+
+  // True if response could use alternate protocol. However, browser will
+  // ignore the alternate protocol when spdy is not enable on browser side.
+  bool was_alternate_protocol_available;
+
+  // Information about the type of connection used to fetch this response.
+  // TODO(yhirano): Add this.
+  // ConnectionInfo connection_info;
+
+  // True if the response was fetched via an explicit proxy (as opposed to a
+  // transparent proxy). The proxy could be any type of proxy, HTTP or SOCKS.
+  // Note: we cannot tell if a transparent proxy may have been involved. If
+  // true, |proxy_server| contains the name of the proxy server that was used.
+  bool was_fetched_via_proxy;
+
+  // TODO(yhirano): Add this.
+  // net::HostPortPair proxy_server;
+
+  // NPN protocol negotiated with the server.
+  string npn_negotiated_protocol;
+
+  // Remote address of the socket which fetched this resource.
+  // TODO(yhirano): Add this.
+  // net::HostPortPair socket_address;
+
+  // True if the response was fetched by a ServiceWorker.
+  bool was_fetched_via_service_worker;
+
+  // True when the request whoes mode is |CORS| or |CORS-with-forced-preflight|
+  // is sent to a ServiceWorker but FetchEvent.respondWith is not called. So the
+  // renderer have to resend the request with skip service worker flag
+  // considering the CORS preflight logic.
+  bool was_fallback_required_by_service_worker;
+
+  // The original URL of the response which was fetched by the ServiceWorker.
+  // This may be empty if the response was created inside the ServiceWorker.
+  string original_url_via_service_worker;
+
+  // The type of the response which was fetched by the ServiceWorker.
+  ServiceWorkerResponseType response_type_via_service_worker;
+
+  // The time immediately before starting ServiceWorker. If the response is not
+  // provided by the ServiceWorker, kept empty.
+  // TODO(ksakamoto): Move this to net::LoadTimingInfo.
+  int64 service_worker_start_time;
+
+  // The time immediately before dispatching fetch event in ServiceWorker.
+  // If the response is not provided by the ServiceWorker, kept empty.
+  // TODO(ksakamoto): Move this to net::LoadTimingInfo.
+  int64 service_worker_ready_time;
+
+  // True when the response is served from the CacheStorage via the
+  // ServiceWorker.
+  bool is_in_cache_storage;
+
+  // The cache name of the CacheStorage from where the response is served via
+  // the ServiceWorker. Empty if the response isn't from the CacheStorage.
+  string cache_storage_cache_name;
+
+  // Whether or not the request was for a LoFi version of the resource.
+  bool is_using_lofi;
+};
+
+struct URLLoaderStatus {
+  // The error code.
+  int32 network_error;
+
+  // True when the request was ignored by the request handler.
+  bool was_ignored_by_handler;
+
+  // True when the resource for the request exists in the cache.
+  bool exists_in_cache;
+
+  // Serialized securify info; see content/common/ssl_status_serialization.h.
+  string security_info;
+
+  // Time the request completed.
+  int64 completion_time;
+
+  // Total amount of data received from the network.
+  int64 encoded_data_length;
+};
+
+interface URLLoader {
+  // Loads the given |request|, asynchronously producing |response|. Consult
+  // |response| to determine if the request resulted in an error, was
+  // redirected, or has a response body to be consumed.
+  Load(URLRequest request, URLLoaderClient client);
+
+  // If the request passed to |Load| had |auto_follow_redirects| set to false,
+  // then upon receiving an URLResponse with a non-NULL |redirect_url| field,
+  // |FollowRedirect| may be called to load the URL indicated by the redirect.
+  FollowRedirect();
+
+  // Cancels the request.
+  Cancel();
+};
+
+interface URLLoaderClient {
+  OnReceiveResponse(URLResponse response);
+  OnComplete(URLLoaderStatus completion_status);
+};
+