blob: b91e57e412c64f5b7cd937795027f9cdb5e068d2 [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "flutter/shell/platform/common/json_message_codec.h"
#include <iostream>
#include <string>
#include "rapidjson/error/en.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"
namespace flutter {
// static
const JsonMessageCodec& JsonMessageCodec::GetInstance() {
static JsonMessageCodec sInstance;
return sInstance;
}
std::unique_ptr<std::vector<uint8_t>> JsonMessageCodec::EncodeMessageInternal(
const rapidjson::Document& message) const {
// TODO: Look into alternate writers that would avoid the buffer copy.
rapidjson::StringBuffer buffer;
rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
message.Accept(writer);
const char* buffer_start = buffer.GetString();
return std::make_unique<std::vector<uint8_t>>(
buffer_start, buffer_start + buffer.GetSize());
}
std::unique_ptr<rapidjson::Document> JsonMessageCodec::DecodeMessageInternal(
const uint8_t* binary_message,
const size_t message_size) const {
auto raw_message = reinterpret_cast<const char*>(binary_message);
auto json_message = std::make_unique<rapidjson::Document>();
rapidjson::ParseResult result =
json_message->Parse(raw_message, message_size);
bool parsing_successful =
result == rapidjson::ParseErrorCode::kParseErrorNone;
if (!parsing_successful) {
std::cerr << "Unable to parse JSON message:" << std::endl
<< rapidjson::GetParseError_En(result.Code()) << std::endl;
return nullptr;
}
return json_message;
}
} // namespace flutter