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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 "bytestream_server.hpp"
#include <fstream>
#include <sstream>
#include <utility>
#include "fmt/core.h"
#include "src/buildtool/compatibility/native_support.hpp"
#include "src/buildtool/execution_api/common/bytestream_common.hpp"
#include "src/buildtool/storage/garbage_collector.hpp"
#include "src/utils/cpp/tmp_dir.hpp"
namespace {
auto ParseResourceName(std::string const& x) -> std::optional<std::string> {
// resource name is like this
// remote-execution/uploads/c4f03510-7d56-4490-8934-01bce1b1288e/blobs/62183d7a696acf7e69e218efc82c93135f8c85f895/4424712
if (auto end = x.rfind('/'); end != std::string::npos) {
if (auto start = x.rfind('/', end - 1); start != std::string::npos) {
return x.substr(start + 1, end - start - 1);
}
}
return std::nullopt;
}
} // namespace
auto BytestreamServiceImpl::Read(
::grpc::ServerContext* /*context*/,
const ::google::bytestream::ReadRequest* request,
::grpc::ServerWriter<::google::bytestream::ReadResponse>* writer)
-> ::grpc::Status {
logger_.Emit(LogLevel::Trace, "Read {}", request->resource_name());
// resource_name is of type
// remote-execution/blobs/62f408d64bca5de775c4b1dbc3288fc03afd6b19eb/0
std::istringstream iss{request->resource_name()};
auto hash = ParseResourceName(request->resource_name());
if (!hash) {
auto str = fmt::format("could not parse {}", request->resource_name());
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT, str};
}
auto lock = GarbageCollector::SharedLock();
if (!lock) {
auto str = fmt::format("Could not acquire SharedLock");
logger_.Emit(LogLevel::Error, str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
std::optional<std::filesystem::path> path{};
if (NativeSupport::IsTree(*hash)) {
ArtifactDigest dgst{NativeSupport::Unprefix(*hash), 0, true};
path = storage_->CAS().TreePath(static_cast<bazel_re::Digest>(dgst));
}
else {
ArtifactDigest dgst{NativeSupport::Unprefix(*hash), 0, false};
path = storage_->CAS().BlobPath(static_cast<bazel_re::Digest>(dgst),
false);
}
if (!path) {
auto str = fmt::format("could not find {}", *hash);
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{::grpc::StatusCode::NOT_FOUND, str};
}
std::ifstream blob{*path};
::google::bytestream::ReadResponse response;
std::string buffer(kChunkSize, '\0');
bool done = false;
blob.seekg(request->read_offset());
while (!done) {
blob.read(buffer.data(), kChunkSize);
if (blob.eof()) {
// do not send random bytes
buffer.resize(static_cast<std::size_t>(blob.gcount()));
done = true;
}
*(response.mutable_data()) = buffer;
writer->Write(response);
}
return ::grpc::Status::OK;
}
auto BytestreamServiceImpl::Write(
::grpc::ServerContext* /*context*/,
::grpc::ServerReader<::google::bytestream::WriteRequest>* reader,
::google::bytestream::WriteResponse* response) -> ::grpc::Status {
::google::bytestream::WriteRequest request;
reader->Read(&request);
logger_.Emit(LogLevel::Debug, "write {}", request.resource_name());
auto hash = ParseResourceName(request.resource_name());
if (!hash) {
auto str = fmt::format("could not parse {}", request.resource_name());
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT, str};
}
logger_.Emit(LogLevel::Trace,
"Write: {}, offset {}, finish write {}",
*hash,
request.write_offset(),
request.finish_write());
auto lock = GarbageCollector::SharedLock();
if (!lock) {
auto str = fmt::format("Could not acquire SharedLock");
logger_.Emit(LogLevel::Error, str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
auto tmp_dir = TmpDir::Create(StorageConfig::GenerationCacheRoot(0) /
"execution-service");
if (!tmp_dir) {
return ::grpc::Status{::grpc::StatusCode::INTERNAL,
"could not create TmpDir"};
}
auto tmp = tmp_dir->GetPath() / *hash;
{
std::ofstream of{tmp, std::ios::binary};
of.write(request.data().data(),
static_cast<std::streamsize>(request.data().size()));
}
while (!request.finish_write() && reader->Read(&request)) {
std::ofstream of{tmp, std::ios::binary | std::ios::app};
of.write(request.data().data(),
static_cast<std::streamsize>(request.data().size()));
}
if (NativeSupport::IsTree(*hash)) {
if (not storage_->CAS().StoreTree</*kOwner=*/true>(tmp)) {
auto str = fmt::format("could not store tree {}", *hash);
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT, str};
}
}
else {
if (not storage_->CAS().StoreBlob</*kOwner=*/true>(
tmp, /*is_executable=*/false)) {
auto str = fmt::format("could not store blob {}", *hash);
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT, str};
}
}
response->set_committed_size(
static_cast<google::protobuf::int64>(std::filesystem::file_size(tmp)));
return ::grpc::Status::OK;
}
auto BytestreamServiceImpl::QueryWriteStatus(
::grpc::ServerContext* /*context*/,
const ::google::bytestream::QueryWriteStatusRequest* /*request*/,
::google::bytestream::QueryWriteStatusResponse* /*response*/)
-> ::grpc::Status {
auto const* str = "QueryWriteStatus not implemented";
logger_.Emit(LogLevel::Error, str);
return ::grpc::Status{grpc::StatusCode::UNIMPLEMENTED, str};
}
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