Utils: Add curl context utility class

3 files changed, 84 insertions, 0 deletions

diff --git a/src/utils/cpp/TARGETS b/src/utils/cpp/TARGETS
index 43ff504a..82177208 100644
--- a/src/utils/cpp/TARGETS
+++ b/src/utils/cpp/TARGETS
@@ -58,4 +58,12 @@
   , "stage": ["src", "utils", "cpp"]
   , "private-deps": [["src/buildtool/file_system", "file_system_manager"]]
   }
+, "curl_context":
+  { "type": ["@", "rules", "CC", "library"]
+  , "name": ["curl_context"]
+  , "hdrs": ["curl_context.hpp"]
+  , "srcs": ["curl_context.cpp"]
+  , "stage": ["src", "utils", "cpp"]
+  , "private-deps": [["src/buildtool/logging", "logging"], ["", "libcurl"]]
+  }
 }
diff --git a/src/utils/cpp/curl_context.cpp b/src/utils/cpp/curl_context.cpp
new file mode 100644
index 00000000..3369b2d3
--- /dev/null
+++ b/src/utils/cpp/curl_context.cpp
@@ -0,0 +1,40 @@
+// Copyright 2022 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/utils/cpp/curl_context.hpp"
+
+#include "src/buildtool/logging/logger.hpp"
+
+#ifndef BOOTSTRAP_BUILD_TOOL
+extern "C" {
+#include <curl/curl.h>
+}
+#endif  // BOOTSTRAP_BUILD_TOOL
+
+CurlContext::CurlContext() noexcept {
+#ifndef BOOTSTRAP_BUILD_TOOL
+    // NOLINTNEXTLINE(hicpp-signed-bitwise)
+    if (not(initialized_ = (curl_global_init(CURL_GLOBAL_DEFAULT) >= 0))) {
+        Logger::Log(LogLevel::Error, "initializing libcurl failed");
+    }
+#endif  // BOOTSTRAP_BUILD_TOOL
+}
+
+CurlContext::~CurlContext() noexcept {
+#ifndef BOOTSTRAP_BUILD_TOOL
+    if (initialized_) {
+        curl_global_cleanup();
+    }
+#endif  // BOOTSTRAP_BUILD_TOOL
+}
\ No newline at end of file
diff --git a/src/utils/cpp/curl_context.hpp b/src/utils/cpp/curl_context.hpp
new file mode 100644
index 00000000..e408b8bf
--- /dev/null
+++ b/src/utils/cpp/curl_context.hpp
@@ -0,0 +1,36 @@
+// Copyright 2022 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_CURL_CONTEXT_HPP
+#define INCLUDED_SRC_OTHER_TOOLS_CURL_CONTEXT_HPP
+
+/// \brief Maintainer of a libcurl state.
+/// Classes, static methods, and global functions dealing with curl operations
+/// should create a CurlContext before using libcurl.
+class CurlContext {
+  public:
+    // prohibit moves and copies
+    CurlContext(CurlContext const&) = delete;
+    CurlContext(CurlContext&& other) = delete;
+    auto operator=(CurlContext const&) = delete;
+    auto operator=(CurlContext&& other) = delete;
+
+    CurlContext() noexcept;
+    ~CurlContext() noexcept;
+
+  private:
+    bool initialized_{false};
+};
+
+#endif  // INCLUDED_SRC_OTHER_TOOLS_CURL_CONTEXT_HPP
\ No newline at end of file