Move content archive helper functions in own library

2 files changed, 60 insertions, 0 deletions

diff --git a/src/other_tools/utils/TARGETS b/src/other_tools/utils/TARGETS
index df08d551..35685ba7 100644
--- a/src/other_tools/utils/TARGETS
+++ b/src/other_tools/utils/TARGETS
@@ -28,4 +28,15 @@
   , "stage": ["src", "other_tools", "utils"]
   , "private-deps": [["src/buildtool/logging", "logging"], ["", "libcurl"]]
   }
+, "content":
+  { "type": ["@", "rules", "CC", "library"]
+  , "name": ["content"]
+  , "hdrs": ["content.hpp"]
+  , "deps":
+    [ "curl_easy_handle"
+    , ["src/buildtool/common", "user_structs"]
+    , ["src/buildtool/crypto", "hasher"]
+    ]
+  , "stage": ["src", "other_tools", "utils"]
+  }
 }
diff --git a/src/other_tools/utils/content.hpp b/src/other_tools/utils/content.hpp
new file mode 100644
index 00000000..e7cb7501
--- /dev/null
+++ b/src/other_tools/utils/content.hpp
@@ -0,0 +1,49 @@
+// 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 "src/buildtool/common/user_structs.hpp"
+#include "src/buildtool/crypto/hasher.hpp"
+#include "src/other_tools/utils/curl_easy_handle.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);
+    if (not curl_handle) {
+        return std::nullopt;
+    }
+    return curl_handle->DownloadToString(fetch_url);
+}
+
+template <Hasher::HashType type>
+[[nodiscard]] static auto GetContentHash(std::string const& data) noexcept
+    -> std::string {
+    Hasher hasher{type};
+    hasher.Update(data);
+    auto digest = std::move(hasher).Finalize();
+    return digest.HexString();
+}
+
+#endif  // INCLUDED_SRC_OTHER_TOOLS_UTILS_CONTENT_HPP