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// Copyright 2024 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/common/bytestream_utils.hpp"
#include <string_view>
#include <utility>
#include <vector>
#include "fmt/core.h"
#include "src/buildtool/common/bazel_types.hpp"
namespace {
/// \brief Split a string into parts with '/' delimiter
/// \param request String to be split
/// \return A vector of parts on success or an empty vector on failure.
[[nodiscard]] auto SplitRequest(std::string const& request) noexcept
-> std::vector<std::string_view> {
std::vector<std::string_view> parts;
try {
std::size_t shift = 0;
for (std::size_t length = 0; shift + length < request.size();
++length) {
if (request.at(shift + length) == '/') {
parts.emplace_back(request.data() + shift, length);
shift += length + 1;
length = 0;
}
}
if (shift < request.size()) {
parts.emplace_back(request.data() + shift, request.size() - shift);
}
} catch (...) {
return {};
}
return parts;
}
[[nodiscard]] inline auto ToBazelDigest(std::string hash,
std::int64_t size) noexcept
-> bazel_re::Digest {
bazel_re::Digest digest{};
digest.set_hash(std::move(hash));
digest.set_size_bytes(size);
return digest;
}
} // namespace
ByteStreamUtils::ReadRequest::ReadRequest(
std::string instance_name,
bazel_re::Digest const& digest) noexcept
: instance_name_{std::move(instance_name)},
hash_{digest.hash()},
size_{digest.size_bytes()} {}
auto ByteStreamUtils::ReadRequest::ToString() && noexcept -> std::string {
return fmt::format("{}/{}/{}/{}",
std::move(instance_name_),
ByteStreamUtils::kBlobs,
std::move(hash_),
size_);
}
auto ByteStreamUtils::ReadRequest::FromString(
std::string const& request) noexcept -> std::optional<ReadRequest> {
static constexpr std::size_t kInstanceNameIndex = 0U;
static constexpr std::size_t kBlobsIndex = 1U;
static constexpr std::size_t kHashIndex = 2U;
static constexpr std::size_t kSizeIndex = 3U;
static constexpr std::size_t kReadRequestPartsCount = 4U;
auto const parts = ::SplitRequest(request);
if (parts.size() != kReadRequestPartsCount or
parts.at(kBlobsIndex).compare(ByteStreamUtils::kBlobs) != 0) {
return std::nullopt;
}
ReadRequest result;
result.instance_name_ = std::string(parts.at(kInstanceNameIndex));
result.hash_ = std::string(parts.at(kHashIndex));
try {
result.size_ = std::stoi(std::string(parts.at(kSizeIndex)));
} catch (...) {
return std::nullopt;
}
return result;
}
auto ByteStreamUtils::ReadRequest::GetDigest() const noexcept
-> bazel_re::Digest {
return ToBazelDigest(hash_, size_);
}
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