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// Copyright (c) 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_BROWSER_APPCACHE_APPCACHE_UPDATE_URL_LOADER_REQUEST_H_
#define CONTENT_BROWSER_APPCACHE_APPCACHE_UPDATE_URL_LOADER_REQUEST_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "content/browser/appcache/appcache_update_request_base.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "net/base/io_buffer.h"
#include "services/network/public/cpp/net_adapters.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/cpp/resource_response.h"
#include "services/network/public/mojom/url_loader.mojom.h"
namespace net {
class HttpResponseInfo;
}
namespace content {
class URLLoaderFactoryGetter;
// URLLoaderClient subclass for the UpdateRequestBase class. Provides
// functionality to update the AppCache using functionality provided by the
// network URL loader.
class AppCacheUpdateJob::UpdateURLLoaderRequest
: public AppCacheUpdateJob::UpdateRequestBase,
public network::mojom::URLLoaderClient {
public:
~UpdateURLLoaderRequest() override;
// UpdateRequestBase overrides.
void Start() override;
void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers) override;
GURL GetURL() const override;
void SetLoadFlags(int flags) override;
int GetLoadFlags() const override;
std::string GetMimeType() const override;
void SetSiteForCookies(const GURL& site_for_cookies) override;
void SetInitiator(const base::Optional<url::Origin>& initiator) override;
net::HttpResponseHeaders* GetResponseHeaders() const override;
int GetResponseCode() const override;
const net::HttpResponseInfo& GetResponseInfo() const override;
void Read() override;
int Cancel() override;
// network::mojom::URLLoaderClient implementation.
// These methods are called by the network loader.
void OnReceiveResponse(
const network::ResourceResponseHead& response_head) override;
void OnReceiveRedirect(
const net::RedirectInfo& redirect_info,
const network::ResourceResponseHead& response_head) 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 network::URLLoaderCompletionStatus& status) override;
private:
UpdateURLLoaderRequest(URLLoaderFactoryGetter* loader_factory_getter,
const GURL& url,
int buffer_size,
URLFetcher* fetcher);
// Helper function to initiate an asynchronous read on the data pipe.
void StartReading(MojoResult unused);
// Helper function to setup the data pipe watcher to start reading from
// the pipe. We need to do this when the data pipe is available and there is
// a pending read.
void MaybeStartReading();
friend class AppCacheUpdateJob::UpdateRequestBase;
URLFetcher* fetcher_;
// Used to retrieve the network URLLoader interface to issue network
// requests
scoped_refptr<URLLoaderFactoryGetter> loader_factory_getter_;
network::ResourceRequest request_;
network::ResourceResponseHead response_;
network::URLLoaderCompletionStatus response_status_;
// Response details.
std::unique_ptr<net::HttpResponseInfo> http_response_info_;
// Binds the URLLoaderClient interface to the channel.
mojo::Binding<network::mojom::URLLoaderClient> client_binding_;
// The network URL loader.
network::mojom::URLLoaderPtr url_loader_;
// Caller buffer size.
int buffer_size_;
// The mojo data pipe.
mojo::ScopedDataPipeConsumerHandle handle_;
// Used to watch the data pipe to initiate reads.
mojo::SimpleWatcher handle_watcher_;
// Set to true when the caller issues a read request. We set it to false in
// the StartReading() function when the mojo BeginReadData API returns a
// value indicating one of the following:
// 1. Data is available.
// 2. End of data has been reached.
// 3. Error.
// Please look at the StartReading() function for details.
bool read_requested_;
// Adapter for transferring data from a mojo data pipe to net.
scoped_refptr<network::MojoToNetPendingBuffer> pending_read_;
DISALLOW_COPY_AND_ASSIGN(UpdateURLLoaderRequest);
};
} // namespace content
#endif // CONTENT_BROWSER_APPCACHE_APPCACHE_UPDATE_URL_LOADER_REQUEST_H_
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