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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.
#ifndef INCLUDED_SRC_OTHER_TOOLS_UTILS_CONTENT_HPP
#define INCLUDED_SRC_OTHER_TOOLS_UTILS_CONTENT_HPP
#include <optional>
#include <string>
#include <utility> // std::move
#include "src/buildtool/common/user_structs.hpp"
#include "src/buildtool/crypto/hasher.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/other_tools/just_mr/mirrors.hpp"
#include "src/other_tools/utils/curl_easy_handle.hpp"
#include "src/other_tools/utils/curl_url_handle.hpp"
#include "src/utils/cpp/expected.hpp"
// Utilities related to the content of an archive
/// \brief Fetches a file from the internet and stores its content in memory.
/// \returns the content.
[[nodiscard]] static auto NetworkFetch(std::string const& fetch_url,
CAInfoPtr const& ca_info) noexcept
-> std::optional<std::string> {
auto curl_handle = CurlEasyHandle::Create(
ca_info->no_ssl_verify, ca_info->ca_bundle, LogLevel::Debug);
if (not curl_handle) {
return std::nullopt;
}
return curl_handle->DownloadToString(fetch_url);
}
/// \brief Fetches a file from the internet and stores its content in memory.
/// Tries not only a given remote, but also all associated remote locations.
/// \returns The fetched data on success or an unexpected error as string.
[[nodiscard]] static auto NetworkFetchWithMirrors(
std::string const& fetch_url,
std::vector<std::string> const& mirrors,
CAInfoPtr const& ca_info,
MirrorsPtr const& additional_mirrors) noexcept
-> expected<std::string, std::string> {
// keep all remotes tried, to report in case fetch fails
std::string remotes_buffer{};
std::optional<std::string> data{std::nullopt};
// try repo url
auto all_mirrors = std::vector<std::string>({fetch_url});
// try repo mirrors afterwards
all_mirrors.insert(all_mirrors.end(), mirrors.begin(), mirrors.end());
if (auto preferred_hostnames =
MirrorsUtils::GetPreferredHostnames(additional_mirrors);
not preferred_hostnames.empty()) {
all_mirrors =
MirrorsUtils::SortByHostname(all_mirrors, preferred_hostnames);
}
// always try local mirrors first
auto local_mirrors =
MirrorsUtils::GetLocalMirrors(additional_mirrors, fetch_url);
all_mirrors.insert(
all_mirrors.begin(), local_mirrors.begin(), local_mirrors.end());
for (auto const& mirror : all_mirrors) {
if (data = NetworkFetch(mirror, ca_info); data) {
break;
}
// add local mirror to buffer
remotes_buffer.append(fmt::format("\n> {}", mirror));
}
if (not data) {
return unexpected{remotes_buffer};
}
return *data;
}
template <Hasher::HashType kType>
[[nodiscard]] static auto GetContentHash(std::string const& data) noexcept
-> std::string {
auto hasher = Hasher::Create(kType);
hasher->Update(data);
auto digest = std::move(*hasher).Finalize();
return digest.HexString();
}
#endif // INCLUDED_SRC_OTHER_TOOLS_UTILS_CONTENT_HPP
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