| // 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 <string> |
| |
| #include "base/callback.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "content/browser/download/download_request_core.h" |
| #include "content/browser/loader/resource_handler.h" |
| #include "content/public/browser/download_interrupt_reasons.h" |
| #include "content/public/browser/download_manager.h" |
| #include "content/public/browser/download_save_info.h" |
| #include "content/public/browser/download_url_parameters.h" |
| |
| namespace net { |
| class URLRequest; |
| } // namespace net |
| |
| namespace content { |
| class ByteStreamReader; |
| class ByteStreamWriter; |
| class DownloadRequestHandle; |
| class PowerSaveBlocker; |
| struct DownloadCreateInfo; |
| |
| // Forwards data to the download thread. |
| class CONTENT_EXPORT DownloadResourceHandler |
| : public ResourceHandler, |
| 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( |
| uint32 id, |
| net::URLRequest* request, |
| const DownloadUrlParameters::OnStartedCallback& started_cb, |
| scoped_ptr<DownloadSaveInfo> save_info); |
| |
| bool OnRequestRedirected(const net::RedirectInfo& redirect_info, |
| ResourceResponse* response, |
| bool* defer) override; |
| |
| // Send the download creation information to the download thread. |
| bool OnResponseStarted(ResourceResponse* response, bool* defer) override; |
| |
| // Pass-through implementation. |
| bool OnWillStart(const GURL& url, bool* defer) override; |
| |
| // Pass-through implementation. |
| bool OnBeforeNetworkStart(const GURL& url, bool* defer) override; |
| |
| // Create a new buffer, which will be handed to the download thread for file |
| // writing and deletion. |
| bool OnWillRead(scoped_refptr<net::IOBuffer>* buf, |
| int* buf_size, |
| int min_size) override; |
| |
| bool OnReadCompleted(int bytes_read, bool* defer) override; |
| |
| void OnResponseCompleted(const net::URLRequestStatus& status, |
| const std::string& security_info, |
| bool* defer) override; |
| |
| // N/A to this flavor of DownloadHandler. |
| void OnDataDownloaded(int bytes_downloaded) override; |
| |
| void PauseRequest(); |
| void ResumeRequest(); |
| |
| // May result in this object being deleted by its owner. |
| void CancelRequest(); |
| |
| std::string DebugString() const; |
| |
| private: |
| ~DownloadResourceHandler() override; |
| |
| // Arrange for started_cb_ to be called on the UI thread with the |
| // below values, nulling out started_cb_. Should only be called |
| // on the IO thread. |
| void CallStartedCB(DownloadInterruptReason interrupt_reason); |
| |
| void OnCoreReadyToRead(); |
| |
| uint32 download_id_; |
| |
| // This is read only on the IO thread, but may only |
| // be called on the UI thread. |
| DownloadUrlParameters::OnStartedCallback started_cb_; |
| |
| // 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 scoped_ptr<> to indicate ownership of the structure, but |
| // deletion must occur on the IO thread. |
| scoped_ptr<DownloadTabInfo> tab_info_; |
| |
| DownloadRequestCore core_; |
| DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_RESOURCE_HANDLER_H_ |