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/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPCXX_IMPL_CODEGEN_THRIFT_SERIALIZER_H
#define GRPCXX_IMPL_CODEGEN_THRIFT_SERIALIZER_H
#include <grpc/impl/codegen/byte_buffer_reader.h>
#include <grpc/impl/codegen/slice.h>
#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/protocol/TCompactProtocol.h>
#include <thrift/protocol/TProtocolException.h>
#include <thrift/transport/TBufferTransports.h>
#include <thrift/transport/TTransportUtils.h>
#include <boost/make_shared.hpp>
#include <memory>
#include <stdexcept>
#include <string>
namespace apache {
namespace thrift {
namespace util {
using apache::thrift::protocol::TBinaryProtocolT;
using apache::thrift::protocol::TCompactProtocolT;
using apache::thrift::protocol::TMessageType;
using apache::thrift::protocol::TNetworkBigEndian;
using apache::thrift::transport::TMemoryBuffer;
using apache::thrift::transport::TBufferBase;
using apache::thrift::transport::TTransport;
template <typename Dummy, typename Protocol>
class ThriftSerializer {
public:
ThriftSerializer()
: prepared_(false),
last_deserialized_(false),
serialize_version_(false) {}
virtual ~ThriftSerializer() {}
// Serialize the passed type into the internal buffer
// and returns a pointer to internal buffer and its size
template <typename T>
void Serialize(const T& fields, const uint8_t** serialized_buffer,
size_t* serialized_len) {
// prepare or reset buffer
if (!prepared_ || last_deserialized_) {
prepare();
} else {
buffer_->resetBuffer();
}
last_deserialized_ = false;
// if required serialize protocol version
if (serialize_version_) {
protocol_->writeMessageBegin("", TMessageType(0), 0);
}
// serialize fields into buffer
fields.write(protocol_.get());
// write the end of message
if (serialize_version_) {
protocol_->writeMessageEnd();
}
uint8_t* byte_buffer;
uint32_t byte_buffer_size;
buffer_->getBuffer(&byte_buffer, &byte_buffer_size);
*serialized_buffer = byte_buffer;
*serialized_len = byte_buffer_size;
}
// Serialize the passed type into the byte buffer
template <typename T>
void Serialize(const T& fields, grpc_byte_buffer** bp) {
const uint8_t* byte_buffer;
size_t byte_buffer_size;
Serialize(fields, &byte_buffer, &byte_buffer_size);
grpc_slice slice = grpc_slice_from_copied_buffer(
reinterpret_cast<const char*>(byte_buffer), byte_buffer_size);
*bp = grpc_raw_byte_buffer_create(&slice, 1);
grpc_slice_unref(slice);
}
// Deserialize the passed char array into the passed type, returns the number
// of bytes that have been consumed from the passed string.
template <typename T>
uint32_t Deserialize(uint8_t* serialized_buffer, size_t length, T* fields) {
// prepare buffer if necessary
if (!prepared_) {
prepare();
}
last_deserialized_ = true;
// reset buffer transport
buffer_->resetBuffer(serialized_buffer, length);
// read the protocol version if necessary
if (serialize_version_) {
std::string name = "";
TMessageType mt = static_cast<TMessageType>(0);
int32_t seq_id = 0;
protocol_->readMessageBegin(name, mt, seq_id);
}
// deserialize buffer into fields
uint32_t len = fields->read(protocol_.get());
// read the end of message
if (serialize_version_) {
protocol_->readMessageEnd();
}
return len;
}
// Deserialize the passed byte buffer to passed type, returns the number
// of bytes consumed from byte buffer
template <typename T>
uint32_t Deserialize(grpc_byte_buffer* buffer, T* msg) {
grpc_byte_buffer_reader reader;
grpc_byte_buffer_reader_init(&reader, buffer);
grpc_slice slice = grpc_byte_buffer_reader_readall(&reader);
uint32_t len =
Deserialize(GRPC_SLICE_START_PTR(slice), GRPC_SLICE_LENGTH(slice), msg);
grpc_slice_unref(slice);
grpc_byte_buffer_reader_destroy(&reader);
return len;
}
// set serialization version flag
void SetSerializeVersion(bool value) { serialize_version_ = value; }
// Set the container size limit to deserialize
// This function should be called after buffer_ is initialized
void SetContainerSizeLimit(int32_t container_limit) {
if (!prepared_) {
prepare();
}
protocol_->setContainerSizeLimit(container_limit);
}
// Set the string size limit to deserialize
// This function should be called after buffer_ is initialized
void SetStringSizeLimit(int32_t string_limit) {
if (!prepared_) {
prepare();
}
protocol_->setStringSizeLimit(string_limit);
}
private:
bool prepared_;
bool last_deserialized_;
boost::shared_ptr<TMemoryBuffer> buffer_;
std::shared_ptr<Protocol> protocol_;
bool serialize_version_;
void prepare() {
buffer_ = boost::make_shared<TMemoryBuffer>();
// create a protocol for the memory buffer transport
protocol_ = std::make_shared<Protocol>(buffer_);
prepared_ = true;
}
}; // ThriftSerializer
typedef ThriftSerializer<void, TBinaryProtocolT<TBufferBase, TNetworkBigEndian>>
ThriftSerializerBinary;
typedef ThriftSerializer<void, TCompactProtocolT<TBufferBase>>
ThriftSerializerCompact;
} // namespace util
} // namespace thrift
} // namespace apache
#endif // GRPCXX_IMPL_CODEGEN_THRIFT_SERIALIZER_H
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