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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_BASE_PROTOBUF_HTTP_CLIENT_H_
#define REMOTING_BASE_PROTOBUF_HTTP_CLIENT_H_
#include <list>
#include <memory>
#include <string>
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "remoting/base/oauth_token_getter.h"
#include "remoting/base/url_loader_network_service_observer.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
namespace network {
class SharedURLLoaderFactory;
} // namespace network
namespace remoting {
class ProtobufHttpRequestBase;
// Helper class for executing REST/Protobuf requests over HTTP.
class ProtobufHttpClient final {
public:
// |server_endpoint| is the hostname of the server.
// |token_getter| is nullable if none of the requests are authenticated.
// |token_getter| must outlive |this|.
ProtobufHttpClient(
const std::string& server_endpoint,
OAuthTokenGetter* token_getter,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
~ProtobufHttpClient();
ProtobufHttpClient(const ProtobufHttpClient&) = delete;
ProtobufHttpClient& operator=(const ProtobufHttpClient&) = delete;
// Executes a unary request. Caller will not be notified of the result if
// CancelPendingRequests() is called or |this| is destroyed.
void ExecuteRequest(std::unique_ptr<ProtobufHttpRequestBase> request);
// Cancel all pending requests.
void CancelPendingRequests();
// Indicates whether the client has any pending requests.
bool HasPendingRequests() const;
private:
using PendingRequestList =
std::list<std::unique_ptr<ProtobufHttpRequestBase>>;
// std::list iterators are stable, so they survive list editing and only
// become invalidated when underlying element is deleted.
using PendingRequestListIterator = PendingRequestList::iterator;
void DoExecuteRequest(std::unique_ptr<ProtobufHttpRequestBase> request,
OAuthTokenGetter::Status status,
const std::string& user_email,
const std::string& access_token);
void CancelRequest(const PendingRequestListIterator& request_iterator);
std::string server_endpoint_;
raw_ptr<OAuthTokenGetter> token_getter_;
absl::optional<UrlLoaderNetworkServiceObserver> service_observer_;
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
PendingRequestList pending_requests_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<ProtobufHttpClient> weak_factory_{this};
};
} // namespace remoting
#endif // REMOTING_BASE_PROTOBUF_HTTP_CLIENT_H_
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