Network service: move URLLoaderThrottle and ThrottlingURLLoader.

content/child/throttling_url_loader.h

-// 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.
-
-#ifndef CONTENT_CHILD_THROTTLING_URL_LOADER_H_
-#define CONTENT_CHILD_THROTTLING_URL_LOADER_H_
-
-#include <memory>
-
-#include "content/common/content_export.h"
-#include "content/common/url_loader.mojom.h"
-#include "content/common/url_loader_factory.mojom.h"
-#include "content/public/child/url_loader_throttle.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace content {
-
-namespace mojom {
-class URLLoaderFactory;
-}
-
-// ThrottlingURLLoader is a wrapper around the mojom::URLLoader[Factory]
-// interfaces. It applies a list of URLLoaderThrottle instances which could
-// defer, resume or cancel the URL loading.
-class CONTENT_EXPORT ThrottlingURLLoader : public mojom::URLLoaderClient,
-                                           public URLLoaderThrottle::Delegate {
- public:
-  // |factory| and |client| must stay alive during the lifetime of the returned
-  // object.
-  static std::unique_ptr<ThrottlingURLLoader> CreateLoaderAndStart(
-      mojom::URLLoaderFactory* factory,
-      std::vector<std::unique_ptr<URLLoaderThrottle>> throttles,
-      int32_t routing_id,
-      int32_t request_id,
-      uint32_t options,
-      std::unique_ptr<ResourceRequest> url_request,
-      mojom::URLLoaderClient* client);
-
-  ~ThrottlingURLLoader() override;
-
-  void FollowRedirect();
-  void SetPriority(net::RequestPriority priority, int32_t intra_priority_value);
-
- private:
-  ThrottlingURLLoader(std::vector<std::unique_ptr<URLLoaderThrottle>> throttles,
-                      mojom::URLLoaderClient* client);
-
-  void Start(mojom::URLLoaderFactory* factory,
-             int32_t routing_id,
-             int32_t request_id,
-             uint32_t options,
-             std::unique_ptr<ResourceRequest> url_request);
-
-  // mojom::URLLoaderClient implementation:
-  void OnReceiveResponse(const ResourceResponseHead& response_head,
-                         const base::Optional<net::SSLInfo>& ssl_info,
-                         mojom::DownloadedTempFilePtr downloaded_file) override;
-  void OnReceiveRedirect(const net::RedirectInfo& redirect_info,
-                         const ResourceResponseHead& response_head) override;
-  void OnDataDownloaded(int64_t data_len, int64_t encoded_data_len) override;
-  void OnUploadProgress(int64_t current_position,
-                        int64_t total_size,
-                        OnUploadProgressCallback ack_callback) override;
-  void OnReceiveCachedMetadata(const std::vector<uint8_t>& data) override;
-  void OnTransferSizeUpdated(int32_t transfer_size_diff) override;
-  void OnStartLoadingResponseBody(
-      mojo::ScopedDataPipeConsumerHandle body) override;
-  void OnComplete(const ResourceRequestCompletionStatus& status) override;
-
-  // URLLoaderThrottle::Delegate:
-  void CancelWithError(int error_code) override;
-  void Resume() override;
-
-  enum DeferredStage {
-    DEFERRED_NONE,
-    DEFERRED_START,
-    DEFERRED_REDIRECT,
-    DEFERRED_RESPONSE
-  };
-  DeferredStage deferred_stage_ = DEFERRED_NONE;
-  bool cancelled_by_throttle_ = false;
-
-  std::unique_ptr<URLLoaderThrottle> throttle_;
-
-  mojom::URLLoaderClient* forwarding_client_;
-  mojo::Binding<mojom::URLLoaderClient> client_binding_;
-
-  mojom::URLLoaderAssociatedPtr url_loader_;
-
-  // Set if start is deferred.
-  mojom::URLLoaderFactory* url_loader_factory_ = nullptr;
-  int32_t routing_id_ = -1;
-  int32_t request_id_ = -1;
-  uint32_t options_ = mojom::kURLLoadOptionNone;
-  std::unique_ptr<ResourceRequest> url_request_;
-
-  // Set if either response or redirect is deferred.
-  ResourceResponseHead response_head_;
-
-  // Set if response is deferred.
-  base::Optional<net::SSLInfo> ssl_info_;
-  mojom::DownloadedTempFilePtr downloaded_file_;
-
-  // Set if redirect is deferred.
-  net::RedirectInfo redirect_info_;
-
-  // Set if request is deferred and SetPriority() is called.
-  bool set_priority_cached_ = false;
-  net::RequestPriority priority_ = net::MINIMUM_PRIORITY;
-  int32_t intra_priority_value_ = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(ThrottlingURLLoader);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_THROTTLING_URL_LOADER_H_