| // Copyright (c) 2012 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_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_ |
| #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "components/download/public/common/download_url_parameters.h" |
| #include "content/browser/download/download_request_core.h" |
| #include "content/browser/loader/resource_handler.h" |
| #include "content/public/browser/browser_context.h" |
| #include "content/public/browser/download_manager.h" |
| #include "content/public/browser/web_contents.h" |
| #include "services/metrics/public/cpp/ukm_recorder.h" |
| |
| namespace download { |
| struct DownloadCreateInfo; |
| } // namespace download |
| |
| namespace net { |
| class URLRequest; |
| } // namespace net |
| |
| namespace content { |
| class ByteStreamReader; |
| class ResourceController; |
| |
| // Forwards data to the download thread. |
| class CONTENT_EXPORT DownloadResourceHandler |
| : public ResourceHandler, |
| public DownloadRequestCore::Delegate, |
| public base::SupportsWeakPtr<DownloadResourceHandler> { |
| public: |
| struct DownloadTabInfo; |
| |
| // started_cb will be called exactly once on the UI thread. |
| // |id| should be invalid if the id should be automatically assigned. |
| DownloadResourceHandler(net::URLRequest* request, |
| const std::string& request_origin, |
| download::DownloadSource download_source, |
| bool follow_cross_origin_redirects); |
| |
| // static |
| // This function is passed into ResourceDispatcherHostImpl during its |
| // creation and is used to create instances of DownloadResourceHandler when |
| // intercepting navigation request to download system. |
| // TODO(ananta) |
| // Find a better way to achieve this. Ideally we want to move the logic of |
| // creating DownloadResourceHandler instances out of |
| // ResourceDispatcherHostImpl. |
| static std::unique_ptr<ResourceHandler> Create(net::URLRequest* request); |
| |
| // Create the resource handler when the request is not intercepted from |
| // navigation. |
| static std::unique_ptr<ResourceHandler> CreateForNewRequest( |
| net::URLRequest* request, |
| const std::string& request_origin, |
| download::DownloadSource download_source, |
| bool follow_cross_origin_redirects); |
| |
| void OnRequestRedirected( |
| const net::RedirectInfo& redirect_info, |
| network::ResourceResponse* response, |
| std::unique_ptr<ResourceController> controller) override; |
| |
| // Send the download creation information to the download thread. |
| void OnResponseStarted( |
| network::ResourceResponse* response, |
| std::unique_ptr<ResourceController> controller) override; |
| |
| // Pass-through implementation. |
| void OnWillStart(const GURL& url, |
| std::unique_ptr<ResourceController> controller) override; |
| |
| // Create a new buffer, which will be handed to the download thread for file |
| // writing and deletion. |
| void OnWillRead(scoped_refptr<net::IOBuffer>* buf, |
| int* buf_size, |
| std::unique_ptr<ResourceController> controller) override; |
| |
| void OnReadCompleted(int bytes_read, |
| std::unique_ptr<ResourceController> controller) override; |
| |
| void OnResponseCompleted( |
| const net::URLRequestStatus& status, |
| std::unique_ptr<ResourceController> controller) override; |
| |
| void PauseRequest(); |
| void ResumeRequest(); |
| |
| // May result in this object being deleted by its owner. |
| void CancelRequest(); |
| |
| std::string DebugString() const; |
| |
| private: |
| ~DownloadResourceHandler() override; |
| |
| // DownloadRequestCore::Delegate |
| void OnStart( |
| std::unique_ptr<download::DownloadCreateInfo> download_create_info, |
| std::unique_ptr<ByteStreamReader> stream_reader, |
| const download::DownloadUrlParameters::OnStartedCallback& callback) |
| override; |
| void OnReadyToRead() override; |
| |
| // Stores information about the download that must be acquired on the UI |
| // thread before StartOnUIThread is called. |
| // Created on IO thread, but only accessed on UI thread. |tab_info_| holds |
| // the pointer until we pass it off to StartOnUIThread or DeleteSoon. |
| // Marked as a std::unique_ptr<> to indicate ownership of the structure, but |
| // deletion must occur on the IO thread. |
| std::unique_ptr<DownloadTabInfo> tab_info_; |
| |
| bool follow_cross_origin_redirects_; |
| url::Origin first_origin_; |
| |
| DownloadRequestCore core_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_ |