chromium/net/shared_dictionary/shared_dictionary_network_transaction.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_SHARED_DICTIONARY_SHARED_DICTIONARY_NETWORK_TRANSACTION_H_
#define NET_SHARED_DICTIONARY_SHARED_DICTIONARY_NETWORK_TRANSACTION_H_

#include <vector>

#include "base/functional/callback.h"
#include "base/memory/raw_ref.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "net/base/completion_once_callback.h"
#include "net/base/net_errors.h"
#include "net/base/net_export.h"
#include "net/http/http_transaction.h"
#include "net/shared_dictionary/shared_dictionary_getter.h"
#include "net/socket/next_proto.h"

class GURL;

namespace net {
class SharedDictionary;
class SourceStream;
struct TransportInfo;

// A `HttpTransaction` that decodes shared dictionary compression.
// If the `LOAD_CAN_USE_SHARED_DICTIONARY` flag is not set in the `request`'s
// `load_flags`, this class delegates all function calls to the underlying
// transaction.
// Otherwise, this class registers a callback with the underlying transaction
// that will be called just before the request is sent to the network. When this
// callback is called, this class tries to get a registered dictionary from the
// `shared_dictionary_manager`. If a matching dictionary is found, and the
// "content-encoding" header of the response from the server is "dcb" or "dcz",
// this class will decode the response body using a `BrotliSourceStream` or
// `ZstdSourceStream` with the dictionary.
class NET_EXPORT SharedDictionaryNetworkTransaction : public HttpTransaction { … };

}  // namespace net

#endif  // NET_SHARED_DICTIONARY_SHARED_DICTIONARY_NETWORK_TRANSACTION_H_