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json_message_codec.cc
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "flutter/shell/platform/common/json_message_codec.h"
6
7 #include <iostream>
8 #include <string>
9
10 #include "rapidjson/error/en.h"
11 #include "rapidjson/stringbuffer.h"
12 #include "rapidjson/writer.h"
13
14 namespace flutter {
15
16 // static
17 const JsonMessageCodec& JsonMessageCodec::GetInstance() {
18 static JsonMessageCodec sInstance;
19 return sInstance;
20 }
21
22 std::unique_ptr<std::vector<uint8_t>> JsonMessageCodec::EncodeMessageInternal(
23 const rapidjson::Document& message) const {
24 rapidjson::StringBuffer buffer;
25 rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
26 // clang-tidy has trouble reasoning about some of the complicated array and
27 // pointer-arithmetic code in rapidjson.
28 // NOLINTNEXTLINE(clang-analyzer-core.*)
29 message.Accept(writer);
30 const char* buffer_start = buffer.GetString();
31 return std::make_unique<std::vector<uint8_t>>(
32 buffer_start, buffer_start + buffer.GetSize());
33 }
34
35 std::unique_ptr<rapidjson::Document> JsonMessageCodec::DecodeMessageInternal(
36 const uint8_t* binary_message,
37 const size_t message_size) const {
38 auto raw_message = reinterpret_cast<const char*>(binary_message);
39 auto json_message = std::make_unique<rapidjson::Document>();
40 rapidjson::ParseResult result =
41 json_message->Parse(raw_message, message_size);
42 if (result.IsError()) {
43 std::cerr << "Unable to parse JSON message:" << std::endl
44 << rapidjson::GetParseError_En(result.Code()) << std::endl;
45 return nullptr;
46 }
47 return json_message;
48 }
49
50 } // namespace flutter
flutter::JsonMessageCodec::GetInstance
static const JsonMessageCodec & GetInstance()
Definition: json_message_codec.cc:17
json_message_codec.h
flutter::JsonMessageCodec::DecodeMessageInternal
std::unique_ptr< rapidjson::Document > DecodeMessageInternal(const uint8_t *binary_message, const size_t message_size) const override
Definition: json_message_codec.cc:35
flutter
Definition: AccessibilityBridgeMac.h:16
flutter::JsonMessageCodec
Definition: json_message_codec.h:16
flutter::JsonMessageCodec::EncodeMessageInternal
std::unique_ptr< std::vector< uint8_t > > EncodeMessageInternal(const rapidjson::Document &message) const override
Definition: json_message_codec.cc:22