| // 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. |
| |
| #ifndef CONTENT_BROWSER_LOADER_MOJO_ASYNC_RESOURCE_HANDLER_H_ |
| #define CONTENT_BROWSER_LOADER_MOJO_ASYNC_RESOURCE_HANDLER_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/timer/timer.h" |
| #include "content/browser/loader/resource_handler.h" |
| #include "content/common/content_export.h" |
| #include "content/common/url_loader.mojom.h" |
| #include "mojo/public/cpp/bindings/binding.h" |
| #include "mojo/public/cpp/system/watcher.h" |
| #include "net/base/io_buffer.h" |
| #include "url/gurl.h" |
| |
| namespace net { |
| class URLRequest; |
| } |
| |
| namespace content { |
| class ResourceDispatcherHostImpl; |
| class ResourceRequestInfoImpl; |
| struct ResourceResponse; |
| |
| // Used to complete an asynchronous resource request in response to resource |
| // load events from the resource dispatcher host. This class is used only |
| // when LoadingWithMojo runtime flag is enabled. |
| // |
| // TODO(yhirano): Implement redirects. |
| // TODO(yhirano): Implement downloading to file. |
| // TODO(yhirano): Add histograms. |
| // TODO(yhirano): Set zoom level. |
| // TODO(yhirano): Send cached metadata. |
| // |
| // This class can be inherited only for tests. |
| class CONTENT_EXPORT MojoAsyncResourceHandler |
| : public ResourceHandler, |
| public NON_EXPORTED_BASE(mojom::URLLoader) { |
| public: |
| MojoAsyncResourceHandler( |
| net::URLRequest* request, |
| ResourceDispatcherHostImpl* rdh, |
| mojo::InterfaceRequest<mojom::URLLoader> mojo_request, |
| mojom::URLLoaderClientPtr url_loader_client); |
| ~MojoAsyncResourceHandler() override; |
| |
| // ResourceHandler implementation: |
| bool OnRequestRedirected(const net::RedirectInfo& redirect_info, |
| ResourceResponse* response, |
| bool* defer) override; |
| bool OnResponseStarted(ResourceResponse* response, bool* defer) override; |
| bool OnWillStart(const GURL& url, bool* defer) override; |
| 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, |
| bool* defer) override; |
| void OnDataDownloaded(int bytes_downloaded) override; |
| |
| // mojom::URLLoader implementation |
| void FollowRedirect() override; |
| void Cancel() override; |
| |
| void ResumeForTesting(); |
| static void SetAllocationSizeForTesting(size_t size); |
| static constexpr size_t kDefaultAllocationSize = 512 * 1024; |
| |
| protected: |
| // These functions can be overriden only for tests. |
| virtual MojoResult BeginWrite(void** data, uint32_t* available); |
| virtual MojoResult EndWrite(uint32_t written); |
| |
| private: |
| class SharedWriter; |
| class WriterIOBuffer; |
| |
| // This funcion copies data stored in |buffer_| to |shared_writer_| and |
| // resets |buffer_| to a WriterIOBuffer when all bytes are copied. Returns |
| // true when done successfully. |
| bool CopyReadDataToDataPipe(bool* defer); |
| // Allocates a WriterIOBuffer and set it to |*buf|. Returns true when done |
| // successfully. |
| bool AllocateWriterIOBuffer(scoped_refptr<net::IOBufferWithSize>* buf, |
| bool* defer); |
| |
| void Resume(); |
| void OnDefer(); |
| bool CheckForSufficientResource(); |
| void OnWritable(MojoResult result); |
| |
| ResourceDispatcherHostImpl* rdh_; |
| mojo::Binding<mojom::URLLoader> binding_; |
| |
| bool has_checked_for_sufficient_resources_ = false; |
| bool sent_received_response_message_ = false; |
| bool is_using_io_buffer_not_from_writer_ = false; |
| bool did_defer_ = false; |
| base::TimeTicks response_started_ticks_; |
| |
| mojo::Watcher handle_watcher_; |
| std::unique_ptr<mojom::URLLoader> url_loader_; |
| mojom::URLLoaderClientPtr url_loader_client_; |
| scoped_refptr<net::IOBufferWithSize> buffer_; |
| size_t buffer_offset_ = 0; |
| size_t buffer_bytes_read_ = 0; |
| scoped_refptr<SharedWriter> shared_writer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MojoAsyncResourceHandler); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_LOADER_MOJO_ASYNC_RESOURCE_HANDLER_H_ |