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// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/buildtool/execution_api/execution_service/cas_server.hpp"
#include "fmt/format.h"
#include "src/buildtool/compatibility/native_support.hpp"
#include "src/buildtool/storage/garbage_collector.hpp"
static constexpr std::size_t kJustHashLength = 42;
static constexpr std::size_t kSHA256Length = 64;
static auto IsValidHash(std::string const& x) -> bool {
auto const& length = x.size();
return (Compatibility::IsCompatible() and length == kSHA256Length) or
length == kJustHashLength;
}
auto CASServiceImpl::FindMissingBlobs(
::grpc::ServerContext* /*context*/,
const ::bazel_re::FindMissingBlobsRequest* request,
::bazel_re::FindMissingBlobsResponse* response) -> ::grpc::Status {
auto lock = GarbageCollector::SharedLock();
if (!lock) {
auto str =
fmt::format("FindMissingBlobs: could not acquire SharedLock");
logger_.Emit(LogLevel::Error, str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
for (auto const& x : request->blob_digests()) {
auto const& hash = x.hash();
if (!IsValidHash(hash)) {
logger_.Emit(LogLevel::Error,
"FindMissingBlobs: unsupported digest {}",
hash);
auto* d = response->add_missing_blob_digests();
d->CopyFrom(x);
continue;
}
logger_.Emit(LogLevel::Trace, "FindMissingBlobs: {}", hash);
if (NativeSupport::IsTree(hash)) {
if (!storage_->CAS().TreePath(x)) {
auto* d = response->add_missing_blob_digests();
d->CopyFrom(x);
}
}
else if (!storage_->CAS().BlobPath(x, false)) {
auto* d = response->add_missing_blob_digests();
d->CopyFrom(x);
}
}
return ::grpc::Status::OK;
}
auto CASServiceImpl::CheckDigestConsistency(
std::string const& ref,
std::string const& computed) const noexcept -> std::optional<std::string> {
if (ref != computed) {
auto const& str = fmt::format(
"Blob {} is corrupted: digest and data do not correspond", ref);
logger_.Emit(LogLevel::Error, str);
return str;
}
return std::nullopt;
}
auto CASServiceImpl::BatchUpdateBlobs(
::grpc::ServerContext* /*context*/,
const ::bazel_re::BatchUpdateBlobsRequest* request,
::bazel_re::BatchUpdateBlobsResponse* response) -> ::grpc::Status {
auto lock = GarbageCollector::SharedLock();
if (!lock) {
auto str =
fmt::format("BatchUpdateBlobs: could not acquire SharedLock");
logger_.Emit(LogLevel::Error, str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
for (auto const& x : request->requests()) {
auto const& hash = x.digest().hash();
if (!IsValidHash(hash)) {
auto const& str =
fmt::format("BatchUpdateBlobs: unsupported digest {}", hash);
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{grpc::StatusCode::INVALID_ARGUMENT, str};
}
logger_.Emit(LogLevel::Trace, "BatchUpdateBlobs: {}", hash);
auto* r = response->add_responses();
r->mutable_digest()->CopyFrom(x.digest());
if (NativeSupport::IsTree(hash)) {
auto const& dgst = storage_->CAS().StoreTree(x.data());
if (!dgst) {
auto const& str = fmt::format(
"BatchUpdateBlobs: could not upload tree {}", hash);
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{grpc::StatusCode::INTERNAL, str};
}
if (auto err = CheckDigestConsistency(hash, dgst->hash())) {
return ::grpc::Status{grpc::StatusCode::INVALID_ARGUMENT, *err};
}
}
else {
auto const& dgst = storage_->CAS().StoreBlob(x.data(), false);
if (!dgst) {
auto const& str = fmt::format(
"BatchUpdateBlobs: could not upload blob {}", hash);
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{grpc::StatusCode::INTERNAL, str};
}
if (auto err = CheckDigestConsistency(hash, dgst->hash())) {
return ::grpc::Status{grpc::StatusCode::INVALID_ARGUMENT, *err};
}
}
}
return ::grpc::Status::OK;
}
auto CASServiceImpl::BatchReadBlobs(
::grpc::ServerContext* /*context*/,
const ::bazel_re::BatchReadBlobsRequest* request,
::bazel_re::BatchReadBlobsResponse* response) -> ::grpc::Status {
auto lock = GarbageCollector::SharedLock();
if (!lock) {
auto str = fmt::format("BatchReadBlobs: Could not acquire SharedLock");
logger_.Emit(LogLevel::Error, str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
for (auto const& digest : request->digests()) {
auto* r = response->add_responses();
r->mutable_digest()->CopyFrom(digest);
std::optional<std::filesystem::path> path;
if (NativeSupport::IsTree(digest.hash())) {
path = storage_->CAS().TreePath(digest);
}
else {
path = storage_->CAS().BlobPath(digest, false);
}
if (!path) {
google::rpc::Status status;
status.set_code(grpc::StatusCode::NOT_FOUND);
r->mutable_status()->CopyFrom(status);
continue;
}
std::ifstream cert{*path};
std::string tmp((std::istreambuf_iterator<char>(cert)),
std::istreambuf_iterator<char>());
*(r->mutable_data()) = std::move(tmp);
r->mutable_status()->CopyFrom(google::rpc::Status{});
}
return ::grpc::Status::OK;
}
auto CASServiceImpl::GetTree(
::grpc::ServerContext* /*context*/,
const ::bazel_re::GetTreeRequest* /*request*/,
::grpc::ServerWriter< ::bazel_re::GetTreeResponse>* /*writer*/)
-> ::grpc::Status {
auto const* str = "GetTree not implemented";
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{grpc::StatusCode::UNIMPLEMENTED, str};
}
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