/*
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* Copyright (C) 2018 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 "apex_manifest.h"
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#include "string_log.h"
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#include <android-base/logging.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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#include <memory>
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#include <string>
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using google::protobuf::DescriptorPool;
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using google::protobuf::scoped_ptr;
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using google::protobuf::util::NewTypeResolverForDescriptorPool;
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using google::protobuf::util::TypeResolver;
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namespace android {
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namespace apex {
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namespace {
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const char kTypeUrlPrefix[] = "type.googleapis.com";
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std::string GetTypeUrl(const ApexManifest& apex_manifest) {
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const google::protobuf::Descriptor* message = apex_manifest.GetDescriptor();
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return std::string(kTypeUrlPrefix) + "/" + message->full_name();
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}
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// TODO: JsonStringToMessage is a newly added function in protobuf
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// and is not yet available in the android tree. Replace this function with
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// https://developers.google.com/protocol-buffers/docs/reference/cpp/
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// google.protobuf.util.json_util#JsonStringToMessage.details
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// as and when the android tree gets updated
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StatusOr<ApexManifest> JsonToApexManifestMessage(const std::string& content,
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ApexManifest& apex_manifest) {
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scoped_ptr<TypeResolver> resolver(NewTypeResolverForDescriptorPool(
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kTypeUrlPrefix, DescriptorPool::generated_pool()));
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std::string binary;
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auto parse_status = JsonToBinaryString(
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resolver.get(), GetTypeUrl(apex_manifest), content, &binary);
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if (!parse_status.ok()) {
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return StatusOr<ApexManifest>::MakeError(
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StringLog() << "Failed to parse APEX Manifest JSON config: "
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<< parse_status.error_message().as_string());
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}
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if (!apex_manifest.ParseFromString(binary)) {
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return StatusOr<ApexManifest>::MakeError(
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StringLog() << "Unexpected fields in APEX Manifest JSON config");
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}
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return StatusOr<ApexManifest>(apex_manifest);
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}
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} // namespace
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StatusOr<ApexManifest> ParseManifest(const std::string& content) {
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ApexManifest apex_manifest;
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std::string err;
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StatusOr<ApexManifest> parse_manifest_status =
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JsonToApexManifestMessage(content, apex_manifest);
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if (!parse_manifest_status.Ok()) {
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return parse_manifest_status;
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}
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// Verifying required fields.
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// name
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if (apex_manifest.name().empty()) {
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err = StringLog() << "Missing required field \"name\" from APEX manifest.";
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return StatusOr<ApexManifest>::MakeError(err);
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}
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// version
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if (apex_manifest.version() == 0) {
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err =
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StringLog() << "Missing required field \"version\" from APEX manifest.";
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return StatusOr<ApexManifest>::MakeError(err);
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}
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return parse_manifest_status;
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}
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std::string GetPackageId(const ApexManifest& apexManifest) {
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return apexManifest.name() + "@" + std::to_string(apexManifest.version());
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}
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} // namespace apex
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} // namespace android
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