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// Copyright 2014 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 NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_
#define NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "net/base/completion_callback.h"
#include "net/disk_cache/disk_cache.h"
#include "net/quic/crypto/quic_server_info.h"
namespace net {
class HttpCache;
class IOBuffer;
class QuicServerId;
// DiskCacheBasedQuicServerInfo fetches information about a QUIC server from
// our standard disk cache. Since the information is defined to be
// non-sensitive, it's ok for us to keep it on disk.
class NET_EXPORT_PRIVATE DiskCacheBasedQuicServerInfo
: public QuicServerInfo,
public NON_EXPORTED_BASE(base::NonThreadSafe) {
public:
DiskCacheBasedQuicServerInfo(const QuicServerId& server_id,
HttpCache* http_cache);
// QuicServerInfo implementation.
virtual void Start() OVERRIDE;
virtual int WaitForDataReady(const CompletionCallback& callback) OVERRIDE;
virtual bool IsDataReady() OVERRIDE;
virtual bool IsReadyToPersist() OVERRIDE;
virtual void Persist() OVERRIDE;
private:
struct CacheOperationDataShim;
enum State {
GET_BACKEND,
GET_BACKEND_COMPLETE,
OPEN,
OPEN_COMPLETE,
READ,
READ_COMPLETE,
WAIT_FOR_DATA_READY_DONE,
CREATE_OR_OPEN,
CREATE_OR_OPEN_COMPLETE,
WRITE,
WRITE_COMPLETE,
SET_DONE,
NONE,
};
virtual ~DiskCacheBasedQuicServerInfo();
std::string key() const;
// The |unused| parameter is a small hack so that we can have the
// CacheOperationDataShim object owned by the Callback that is created for
// this method. See comment above CacheOperationDataShim for details.
void OnIOComplete(CacheOperationDataShim* unused, int rv);
int DoLoop(int rv);
int DoGetBackendComplete(int rv);
int DoOpenComplete(int rv);
int DoReadComplete(int rv);
int DoWriteComplete(int rv);
int DoCreateOrOpenComplete(int rv);
int DoGetBackend();
int DoOpen();
int DoRead();
int DoWrite();
int DoCreateOrOpen();
// DoWaitForDataReadyDone is the terminal state of the read operation.
int DoWaitForDataReadyDone();
// DoSetDone is the terminal state of the write operation.
int DoSetDone();
CacheOperationDataShim* data_shim_; // Owned by |io_callback_|.
CompletionCallback io_callback_;
State state_;
bool ready_;
bool found_entry_; // Controls the behavior of DoCreateOrOpen.
std::string new_data_;
const QuicServerId server_id_;
HttpCache* const http_cache_;
disk_cache::Backend* backend_;
disk_cache::Entry* entry_;
CompletionCallback user_callback_;
scoped_refptr<IOBuffer> read_buffer_;
scoped_refptr<IOBuffer> write_buffer_;
std::string data_;
base::WeakPtrFactory<DiskCacheBasedQuicServerInfo> weak_factory_;
};
} // namespace net
#endif // NET_HTTP_DISK_CACHE_BASED_QUIC_SERVER_INFO_H_