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// 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_LOADER_ASYNC_RESOURCE_HANDLER_H_
#define CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "content/browser/loader/resource_handler.h"
#include "content/browser/loader/resource_message_delegate.h"
#include "url/gurl.h"
namespace net {
class URLRequest;
}
namespace content {
class ResourceBuffer;
class ResourceContext;
class ResourceDispatcherHostImpl;
class ResourceMessageFilter;
class SharedIOBuffer;
// Used to complete an asynchronous resource request in response to resource
// load events from the resource dispatcher host.
class AsyncResourceHandler : public ResourceHandler,
public ResourceMessageDelegate {
public:
AsyncResourceHandler(net::URLRequest* request,
ResourceDispatcherHostImpl* rdh);
~AsyncResourceHandler() override;
bool OnMessageReceived(const IPC::Message& message) override;
// ResourceHandler implementation:
bool OnUploadProgress(uint64 position, uint64 size) override;
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 OnBeforeNetworkStart(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,
const std::string& security_info,
bool* defer) override;
void OnDataDownloaded(int bytes_downloaded) override;
private:
// IPC message handlers:
void OnFollowRedirect(int request_id);
void OnDataReceivedACK(int request_id);
bool EnsureResourceBufferIsInitialized();
void ResumeIfDeferred();
void OnDefer();
scoped_refptr<ResourceBuffer> buffer_;
ResourceDispatcherHostImpl* rdh_;
// Number of messages we've sent to the renderer that we haven't gotten an
// ACK for. This allows us to avoid having too many messages in flight.
int pending_data_count_;
int allocation_size_;
bool did_defer_;
bool has_checked_for_sufficient_resources_;
bool sent_received_response_msg_;
bool sent_first_data_msg_;
int64_t reported_transfer_size_;
base::TimeTicks redirect_start_time_;
DISALLOW_COPY_AND_ASSIGN(AsyncResourceHandler);
};
} // namespace content
#endif // CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_
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