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75 lines
2.5 KiB
75 lines
2.5 KiB
4 months ago
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <jsonpb/jsonpb.h>
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#include <android-base/logging.h>
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#include <google/protobuf/descriptor.h>
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#include <google/protobuf/message.h>
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#include <google/protobuf/util/json_util.h>
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#include <google/protobuf/util/type_resolver_util.h>
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namespace android {
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namespace jsonpb {
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using google::protobuf::DescriptorPool;
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using google::protobuf::Message;
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using google::protobuf::util::NewTypeResolverForDescriptorPool;
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using google::protobuf::util::TypeResolver;
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static constexpr char kTypeUrlPrefix[] = "type.googleapis.com";
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std::string GetTypeUrl(const Message& message) {
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return std::string(kTypeUrlPrefix) + "/" + message.GetDescriptor()->full_name();
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}
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ErrorOr<std::string> MessageToJsonString(const Message& message) {
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std::unique_ptr<TypeResolver> resolver(
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NewTypeResolverForDescriptorPool(kTypeUrlPrefix, DescriptorPool::generated_pool()));
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google::protobuf::util::JsonOptions options;
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options.add_whitespace = true;
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std::string json;
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auto status = BinaryToJsonString(resolver.get(), GetTypeUrl(message), message.SerializeAsString(),
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&json, options);
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if (!status.ok()) {
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return MakeError<std::string>(status.error_message().as_string());
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}
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return ErrorOr<std::string>(std::move(json));
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}
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namespace internal {
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ErrorOr<std::monostate> JsonStringToMessage(const std::string& content, Message* message) {
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std::unique_ptr<TypeResolver> resolver(
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NewTypeResolverForDescriptorPool(kTypeUrlPrefix, DescriptorPool::generated_pool()));
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std::string binary;
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auto status = JsonToBinaryString(resolver.get(), GetTypeUrl(*message), content, &binary);
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if (!status.ok()) {
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return MakeError<std::monostate>(status.error_message().as_string());
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}
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if (!message->ParseFromString(binary)) {
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return MakeError<std::monostate>("Fail to parse.");
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}
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return ErrorOr<std::monostate>();
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}
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} // namespace internal
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} // namespace jsonpb
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} // namespace android
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