mirror of https://gitee.com/bigwinds/arangodb
126 lines
3.9 KiB
C++
126 lines
3.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2019 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Jan Christoph Uhde
|
|
/// @author Simon Grätzer
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGOD_GENERAL_SERVER_VST_COMM_TASK_H
|
|
#define ARANGOD_GENERAL_SERVER_VST_COMM_TASK_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
#include "GeneralServer/GeneralCommTask.h"
|
|
#include "Rest/VstRequest.h"
|
|
#include "Rest/VstResponse.h"
|
|
|
|
#include <boost/lockfree/queue.hpp>
|
|
#include <fuerte/detail/vst.h>
|
|
|
|
namespace arangodb {
|
|
namespace rest {
|
|
|
|
template <SocketType T>
|
|
class VstCommTask final : public GeneralCommTask<T> {
|
|
public:
|
|
VstCommTask(GeneralServer& server,
|
|
ConnectionInfo,
|
|
std::unique_ptr<AsioSocket<T>> socket,
|
|
fuerte::vst::VSTVersion v);
|
|
~VstCommTask();
|
|
|
|
bool allowDirectHandling() const override { return false; }
|
|
|
|
protected:
|
|
|
|
std::unique_ptr<GeneralResponse> createResponse(rest::ResponseCode,
|
|
uint64_t messageId) override final;
|
|
|
|
// @brief send simple response including response body
|
|
void addSimpleResponse(rest::ResponseCode, rest::ContentType, uint64_t messageId,
|
|
velocypack::Buffer<uint8_t>&&) override;
|
|
|
|
// convert from GeneralResponse to VstResponse ad dispatch request to class
|
|
// internal addResponse
|
|
void sendResponse(std::unique_ptr<GeneralResponse>, RequestStatistics*) override;
|
|
|
|
bool readCallback(asio_ns::error_code ec) override;
|
|
|
|
|
|
private:
|
|
|
|
// Process the given incoming chunk.
|
|
bool processChunk(fuerte::vst::Chunk const& chunk);
|
|
/// process a VST message
|
|
bool processMessage(velocypack::Buffer<uint8_t>, uint64_t messageId);
|
|
|
|
void doWrite();
|
|
|
|
// process the VST 1000 request type
|
|
void handleAuthHeader(velocypack::Slice header, uint64_t messageId);
|
|
|
|
private:
|
|
using MessageID = uint64_t;
|
|
|
|
struct Message {
|
|
/// used to index chunks in _buffer
|
|
struct ChunkInfo {
|
|
uint32_t index; /// chunk index
|
|
size_t offset; /// offset into buffer
|
|
size_t size; /// content length
|
|
};
|
|
|
|
velocypack::Buffer<uint8_t> buffer;
|
|
/// @brief List of chunks that have been received.
|
|
std::vector<ChunkInfo> chunks;
|
|
std::size_t expectedChunks = 0;
|
|
std::size_t expectedMsgSize = 0;
|
|
|
|
/// @brief add chunk to this message
|
|
/// @return false if the message size is too big
|
|
bool addChunk(fuerte::vst::Chunk const& chunk);
|
|
/// assemble message, if true result is in _buffer
|
|
bool assemble();
|
|
};
|
|
|
|
struct ResponseItem {
|
|
RequestStatistics* stat;
|
|
velocypack::Buffer<uint8_t> metadata;
|
|
std::unique_ptr<GeneralResponse> response;
|
|
std::vector<asio_ns::const_buffer> buffers;
|
|
};
|
|
/// default max chunksize is 30kb in arangodb in all versions
|
|
static constexpr size_t maxChunkSize = 30 * 1024;
|
|
|
|
private:
|
|
|
|
std::map<uint64_t, std::unique_ptr<Message>> _messages;
|
|
boost::lockfree::queue<ResponseItem*, boost::lockfree::capacity<512>> _writeQueue;
|
|
std::atomic<bool> _writing; /// is writing
|
|
|
|
/// Is the current user authorized
|
|
bool _authorized;
|
|
rest::AuthenticationMethod _authMethod;
|
|
fuerte::vst::VSTVersion _vstVersion;
|
|
};
|
|
} // namespace rest
|
|
} // namespace arangodb
|
|
|
|
#endif
|